SYSTEM AND METHOD FOR WIRELESS POWER CONTROL

专利摘要:
a method for operating user equipment (eu) includes receiving at least one of a first group configuration of one or more downlink signals (dl), a second group configuration of one or more power control parameters (pc) open loop, a third group configuration of one or more closed loop pc parameters, or a fourth group configuration of one or more mesh states, receiving a configuration from a pc definition, where the definition of pc is associated with at least one of a subset of the first group, a subset of the second group, a subset of the third group, or a subset of the fourth group, select a transmission power level according to the definition of pc and with a loss of trajectory, in which the loss of trajectory is determined according to a dl reference signal (ss) and a synchronization signal (ss).
公开号:BR112019024051A2
申请号:R112019024051-9
申请日:2018-05-15
公开日:2020-06-02
发明作者:Liu Jialing；Xiao Weimin；Cheng Qian
申请人:Huawei Technologies Co., Ltd.；
IPC主号:

专利说明:

“METHOD IMPLEMENTED BY COMPUTER, USER EQUIPMENT, ACCESS NODE, LEGIBLE MEDIA BY COMPUTER, COMMUNICATION DEVICE AND COMMUNICATION SYSTEM”
TECHNICAL FIELD
[001] The present disclosure refers in general to a system and method for digital communications and, in particular, to a method implemented by computer, user equipment, access node, computer-readable media, communication device and system of communication.
FUNDAMENTALS
[002] The transmission power level of a communications device can have an impact on the data rate of communications. If the transmission power level of transmissions from the communications device is too low, the data rate for the communications device may be reduced due to insufficient signal strength, as well as increased susceptibility to interference from others communications devices. If the transmission power level of transmissions from the communications device is too high, the data rate of other communications devices may be negatively impacted due to increased interference from transmissions from the communications device.
[003] The next generation wireless communications systems will have greater flexibility in terms of power control parameters and settings. As a result, signaling parameters and power control settings can be more complex and increase communications overhead, which will negatively impact the overall performance of the communication system.
[004] So there is a need for systems and methods for wireless power control that scale efficiently with increasing number of power control parameters and settings.
SUMMARY
[005] The example modalities provide a system and method for wireless power control.
[006] According to one example embodiment, a computer-implemented method for operating user equipment (UE) is
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2/70 provided. The method includes receiving at least one of a first group configuration of one or more downlink (DL) signals by the UE, a second group configuration of one or more loop power control (PC) parameters open or a third group configuration of one or more closed loop PC parameters, receiving, by the UE, a PC configuration in which the PC configuration is associated with at least one of a subset of the first group, a subset of the second group or a subset of the third group, determining, by the UE, a transmission power level, according to the PC configuration and with a path loss in which the path loss is calculated, according to the DL signals in the subset of the first group and transmitting, through the UE, a signal in a set of uplink resources (UL) at the transmission power level.
[007] Optionally in any of the previous modalities, a modality in which each DL signal in the first group of one or more DL signals is associated with a first index.
[008] Optionally in any of the previous modalities, a modality in which the DL signals are DL reference signals (RSs) or synchronization signals (SS) and a demodulation reference signal (DMRS) of the physical transmission channel ( PBCH) associated with SS.
[009] Optionally in any of the previous modalities, a modality in which the DL RSs are channel state information RSs (CSI-RSs).
[010] Optionally in any of the above modes, a mode in which the third group of one or more closed loop PC parameters comprises a group of one or more PC transmission command (TPC) configurations.
[011] Optionally in any of the previous modes, a mode in which the third group of one or more closed loop PC parameters comprises a group of one or more PC adjustment state configurations.
[012] Optionally in any of the previous modes, a mode in which each PC setting state setting in the group of one or more PC setting state settings is associated with
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3/70 a third index.
[013] Optionally in any of the previous modes, a mode in which each open loop PC parameter of the second group of one or more open loop PC parameters comprises a pair of Po and alpha (a) parameters, with each pair of Po and alpha (a) parameters associated with a second index.
[014] Optionally in any of the previous modalities, an additional modality comprising receiving, by the UE, a configuration of one or more sets of UL resources and in which one or more sets of UL resources comprise at least one among the resources of audible reference signal (SRS), physical uplink control channel resources (PUCCH) or resources used for a physical uplink shared channel (PUSCH).
[015] Optionally in any of the previous modes, a mode in which the PC configuration is associated with the signal transmitted in the UL resource set.
[016] Optionally in any of the previous modes, a mode in which the transmission power level is additionally selected, according to a power limit value associated with the UE.
[017] Optionally in any of the previous modalities, an additional modality comprising receiving, by the UE, a DL transmission power level for a port of the DL signals in the subset of the first group.
[018] Optionally in any of the previous modes, a mode in which the DL transmission power level is received in a system information block (SIB).
[019] Optionally in any of the previous modes, a mode in which the transmission power level is additionally selected, according to a power received from the reference signal (RSRP) associated with the port and the transmission power level of DL for the door.
[020] Optionally in any of the previous modes, a mode in which the PC configuration is associated with a
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4/70 unique identifier.
[021] Optionally in any of the previous modes, a mode in which the PC configuration is associated with a first index, a second index and a third index.
[022] According to an example embodiment, a computer-implemented method for operating an access node is provided. The method includes sending, through the access node, at least one of a first group configuration of one or more DL signals, a second group configuration of one or more open loop PC parameters or a third party configuration group of one or more closed loop PC parameters sending, through the access node, a PC configuration in which the PC configuration is associated with at least one of a subset of the first group, a subset of the second group or a subset of the third group and receiving, through the access node from a UE, a signal in a set of UL resources at a selected transmission power level, according to the PC configuration and with a loss of path in which the loss of path is calculated according to the DL signals in the subset of the first group.
[023] Optionally in any of the previous modalities, an additional modality comprising sending, through the access node, a configuration of one or more sets of UL resources and in which one or more sets of UL resources comprise at least one among SRS resources, PUCCH resources or resources used for a PUSCH.
[024] Optionally in any of the previous modes, a mode in which the transmission power level is additionally selected, according to a power limit value associated with the UE.
[025] Optionally in any of the previous modalities, an additional modality comprising sending, through the access node, a DL transmission power level to a port of the DL signals in the subset of the first group.
[026] According to an example mode, a UE is provided. The UE includes a memory store comprising instructions and one or more processors in communication with the memory store. Where one or more processors execute instructions for
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5/70 receive at least one of a first group configuration of one or more DL signals, a second group configuration of one or more open loop PC parameters or a third group configuration of one or more parameters closed-loop PC, receiving a PC configuration where the PC configuration is associated with at least one of a subset of the first group, a subset of the second group or a subset of the third group, determining a transmit power level, according to the PC configuration and a loss of path in which the loss of path is calculated, according to the DL signals in the subset of the first group and transmit a signal in a set of UL resources at the power level of streaming.
[027] Optionally in any of the previous modalities, a modality in which one or more processors additionally execute the instructions to receive a configuration of one or more sets of UL resources and in which one or more sets of UL resources comprise at least one of the SRS resources, PUCCH resources or resources used for a PUSCH.
[028] Optionally in any of the previous modes, a mode in which one or more processors additionally execute the instructions to also select the transmission power level, according to a power limit value associated with the UE.
[029] Optionally in any of the previous modes, a mode in which one or more processors additionally execute the instructions to receive a DL transmission power level for a port of the DL signals in the subset of the first group.
[030] According to an example mode, an access node is provided. The access node includes a memory store comprising instructions and one or more processors in communication with the memory store. Where one or more processors execute instructions to send at least one of a first group configuration of one or more DL signals, a second group configuration of one or more open loop PC parameters or a third party configuration group of one or more closed loop PC parameters send a PC configuration where the PC configuration is associated with at least
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6/70 minus one of a subset of the first group, a subset of the second group or a subset of the third group and receive, from a UE, a signal in a set of UL resources at a selected transmission power level, according to the PC configuration and a path loss in which the path loss is calculated, according to the DL signals in the subset of the first group.
[031] Optionally in any of the previous modalities, a modality in which one or more processors additionally execute the instructions to send a configuration of one or more sets of UL resources and in which one or more sets of UL resources comprise at least one of the SRS resources, PUCCH resources or resources used for a PUSCH.
[032] Optionally in any of the previous modes, a mode in which one or more processors additionally execute the instructions to send a DL transmission power level to a port of the DL signals in the subset of the first group.
[033] Optionally in any of the previous modes, a mode in which the transmission power level is additionally selected, according to a power limit value associated with the UE.
[034] The practice of the previous modalities allows efficient signaling of parameters and power control settings as the number of parameters and power control settings of a communication system increases. Consequently, the signaling of power control parameters and settings does not negatively impact the overall communication performance of the communication system by significantly increasing the overhead of communications.
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7/70
BRIEF DESCRIPTION OF THE DRAWINGS
[035] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following descriptions taken in conjunction with the accompanying drawings in which:
[036] Figure 1 illustrates an example of a wireless communication system, according to the modality of the examples described in this report;
[037] Figure 2A illustrates a wireless network to support carrier aggregation (CA) or carrier switching (CS);
[038] Figure 2B illustrates a heterogeneous wireless network (HetNet) configured to support carrier aggregation or carrier selection;
[039] Figure 2C illustrates another heterogeneous wireless network (HetNet) configured to support carrier aggregation, carrier selection or dual connectivity;
[040] Figure 3 illustrates a method of modality for processing signals for 3GPP LTE, as can be performed by a UE;
[041] Figure 4 illustrates power control parameters in 3GPP LTE;
[042] Figure 5 illustrates the first example of power control parameters for an NR communication system, according to the modality of the examples described in this report;
[043] Figure 6 illustrates the second example of power control parameters for an NR communication system, according to the modality of the examples described in this report;
[044] Figure 7 illustrates the third example of power control parameters for an NR communication system, according to the modality of the examples described in this report;
[045] Figure 8 illustrates the relationships between the downlink and uplink beams used for power control;
[046] Figure 9 illustrates a radiated power diagram for an example of a directional antenna, according to the example modality described in this report;
[047] Figure 10A illustrates a flow diagram of example operations that occur on an access node that communicates with a UE with
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8/70 a specified power control setting using groups of power control parameters, according to the modality of the examples described in this report;
[048] Figures 10B to 10D illustrate example techniques used by an access node to send the power control parameter values, according to the example mode described in this report;
[049] Figure 11 illustrates a flow diagram of example operations that occur on an access node that configures groups of power control parameters, according to the modality of the examples described in this report;
[050] Figure 12 illustrates a flow diagram of example operations that take place on a UE that communicates with an access node with a specified power control setting using groups of power control parameters, according to the modality of the examples described in this report;
[051] Figure 13 illustrates a flow diagram of example operations that occur on an access node that communicates with a UE using the power control specified by groups of power control parameters, according to the modality of the examples described in this report;
[052] Figure 14 illustrates a flow diagram of example operations that occur in an UE that communicates with an access node using the power control specified by groups of power control parameters, according to the modality of the examples described in this report;
[053] Figure 15 illustrates a block diagram of a modality processing system that performs the methods described in this report, which can be installed on a host device;
[054] Figure 16 illustrates a block diagram of a transceiver adapted to transmit and receive signaling over a telecommunications network;
[055] Figure 17 illustrates an example of a communication system;
[056] Figures 18A and 18B illustrate examples of devices that can implement the methods and teachings, in accordance with this disclosure; and
[057] Figure 19 is a block diagram of a
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9/70 computation that can be used to implement the devices and methods disclosed in this report.
DETAILED DESCRIPTION OF THE ILLUSTRATIVE MODALITIES
[058] The manufacture and use of the disclosed modalities are discussed in detail below. It should be appreciated, however, that the present disclosure provides many applicable inventive concepts that can be incorporated in a variety of specific contexts. The specific modalities discussed are merely illustrative of specific ways of making and using the modalities and do not limit the scope of the disclosure.
[059] Figure 1 illustrates an example of wireless communication system 100. Communication system 100 includes an access node 110 with a coverage area 101. Access node 110 serves a plurality of user equipment (UEs) 120. Communication system 100 also includes a return network 130. As shown, access node 110 establishes uplink channels (shown as dashed lines) or downlink channels (shown as solid lines) with UEs 120, which they serve to transport data from UEs 120 to access node 110 and vice versa. The data carried through the uplink channels or downlink channels can include data communicated between UEs 120, as well as data communicated to or from a remote end (not shown) via the return network 130.
[060] In an operating mode, communications to and from the plurality of UEs pass through access node 105 while in device-to-device communications mode, such as proximity services (ProSe) mode, for example , direct communication between UEs is possible. Access nodes can also be commonly referred to as Bs nodes, evolved Bs nodes (eNBs), next generation Bs nodes (NGs) (gNBs) and main eNBs (MeNBs), secondary eNBs (SeNBs), main gNBs (MgNBs), secondary gNBs (SgNBs), network controllers, control nodes, base stations, access points, transmission points (TPs), transmission reception points (TRPs), cells, carriers, macrocells, femtocell, peak cells and so on while UEs can also be commonly referred to as mobile stations, cell phones, terminals, users, subscriber stations and the like. Access nodes can provide wireless access, from
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10/70 according to one or more wireless communication protocols, for example long term evolution (LTE) of the Third Generation Partnership Project (3GPP), advanced 3GPP LTE (LTE-A), Fifth Generation (5G), 5G LTE, New 5G Radio (NR), High Speed Packet Access (HSPA), 802.11a Wi-Fi, b, g, n or ac etc. While it is understood that communications systems can use multiple access nodes capable of communicating with multiple UEs, only one access node and two UEs are illustrated for simplicity.
[061] Figure 2A illustrates a wireless network 210 to support carrier aggregation (CA) or carrier switching (CS). As shown, an access node 211 communicates with a UE 215 through different component carriers 216, 217. In some embodiments, component carrier 216 is a primary component carrier (PCC) and component carrier 217 is a secondary component carrier (SCC). In one embodiment, the PCC carries control information (for example, return from UE 215 to access node 211) and the SCC carries data traffic. In the 3GPP Rel-10 specification, a component carrier is called a cell. When multiple cells are controlled by the same eNB, a single programmer can cross-program multiple cells. In the context of carrier aggregation, a high power node can operate and control several component carriers, thereby forming a primary cell (Pcell) and a secondary cell (Scell). A primary carrier that is communicated from an access node to a UE can be referred to as a Primary Downlink Component Carrier (DL PCC) while a primary carrier communicated from a UE to an access node can be referred to as a Primary Uplink Component Carrier (UL PCC). A secondary carrier that is communicated from an access node to a UE can be referred to as a Downlink Secondary Component Carrier (DL SCC) while a secondary carrier communicated from a UE to an access node can be referred to as a Secondary Uplink Component Carrier (UL SCC). In the 3GPP Rel-11 project, an eNB can control both a macrocell and a peak cell. In this case, the return between the macrocell and the peak cell is a quick return. The eNB can dynamically control the transmission or reception of both the macrocell
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11/70 and the peak cell. It should be noted that the terms carriers, channels, bands, sub-bands, parts of bandwidth, frequency units, virtual carriers, cells, virtual cells, etc., when referring to a set of frequency resources generally contiguous configured or used for an UE refers to a unit for the programmer to operate.
[062] In a modern wireless network, access nodes can be grouped together to form a group of access nodes. Each access node in the group can have multiple antennas and can provide wireless access to multiple UEs in a wireless coverage area of the corresponding access node. Resources can be allocated to UEs based on a programming algorithm, for example, proportional justice, round robin etc. Figure 2B illustrates a heterogeneous wireless network (HetNet) 220 configured to support carrier aggregation or carrier selection. As shown, access nodes 221,222 communicate with a UE 225 through different component carriers 226, 227. Access node 221 can be a high power node (for example, a macrocell) and access node 222 can be a low power node, for example, a peak cell, femtocell, microcell, retransmission, remote radio head (RRHs), remote radio unit, a distributed antenna, etc. Consequently, access node 222 may have a smaller footprint than access node 221. Low-power nodes can provide improved cell coverage, capacity and applications for homes and businesses, as well as metropolitan and rural public spaces.
[063] Figure 2C illustrates another heterogeneous wireless network (HetNet) 230 configured to support carrier aggregation, carrier selection or dual connectivity. As shown, access nodes (or transmit or receive points, TRPs) 232, 233, 234 communicate with a UE 235 through different component carriers 236, 237, 238. Access node 234 can be an access node high power (for example, a macrocell) and access nodes 232, 233 can be a low power node, for example, a peak cell, femtocell, microcell, retransmission, remote radio head (RRHs), radio unit remote, a distributed antenna, etc. Access nodes or TRPs at different locations can be connected via quick returns (sometimes referred to as an ideal return) that makes access nodes or TRPs
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12/70 act as an access node or controlled as an access node. Access nodes or TRPs at different locations can be connected via a non-ideal feedback that requires radio resources at each location to be managed with a certain amount of autonomy especially for fast time scale resources in the physical access control layers (PHY ) or media (MAC), but coordinated between locations through a non-ideal slow-time feedback for some layers of radio resource control (RRC) and higher (or greater). This is referred to as dual connectivity. As related to the antenna ports from the same TRP location they can share certain points in common, such as the same doppler spread, propagation delay etc. In general, the network generally does not reveal the antenna port location information to the UE, but in some cases, this can help signal the UE about the commonality of the antenna ports. Flagged properties are referred to as quasi-placement relationships (QCL). QCL relationships can define a relationship between two reference signals or data signals so that the two signals can be seen to have similar characteristics. Example features include carrier frequency, time shift, frequency shift, spatial precoding vectors, and so on.
[064] Although Figures 2B to 2C represent access nodes that communicate with a UE through different component carriers, it must be assessed that in some implementations, access nodes on a HetNet can be communicated with a UE through the same component carriers.
[065] Some Het-Nets may have multiple high-power access nodes or multiple low-power access nodes that operate across multiple component carriers. Access nodes on the same Het-Net can be interconnected by slow slow return connections depending on the deployment. Quick return connections can be used to improve coordination between access nodes, such as transmitting or receiving together. Multiple remote radio units can be connected to the same base band unit as the eNB via fiber cable to relatively support low latency communications between the base band unit and the remote radio unit. In some modalities, the same
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13/70 baseband unit processes the coordinated transmission or reception of multiple cells. For example, a baseband unit can coordinate a joint transmission (for example, a multi-point coordinated transmission (CoMP)) from multiple access nodes to a UE or multiple cell transmissions to a terminal to carry out a transmission CoMP. As another example, a baseband unit can coordinate a joint reception of a signal communicated from a UE to multiple access nodes to effect a CoMP reception. Quick return connections can also be used to coordinate joint programming between different access nodes. Densely deployed networks are an extension of HetNets and include relatively large numbers of densely deployed low-power access nodes to provide enhanced coverage and throughput. Densely deployed networks can be especially well suited for internal or external access points.
[066] In a wireless network, reference signals, data signals and control signals can be communicated through orthogonal time frequency resources. Orthogonal frequency division multiplexing (OFDM) is generally used, with cyclic displacement OFDM (CP-) being a commonly used variant. For example, the respective signals can be mapped to different resource elements (REs) in a resource block (RB) of a radio frame. In some cases, variants or related ones, such as Discrete Fourier Transform (OFDM) dispersion OFDM (DFT-SOFDM), frequency split interspersed multiple access, OFDMA, SCFDMA and so on, can be used.
[067] Figure 3 illustrates a method of modality 300 for processing signals for 3GPP LTE, as can be performed by a UE. In steps 305 and 310, the UE processes a primary sync signal (PSS) and a secondary sync signal (SSS), respectively, to determine a cell identity and frame time for a physical broadcast channel. In step 315, the UE processes a cell-specific reference signal (CRS) from the physical broadcast channel to obtain the channel information, as in 3GPP LTE; in 3GPP NR or other systems, CRS may not be present and channel information may be obtained from SSS, a demodulation reference signal (DMRS), discovery reference signal (DRS), a
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14/70 channel status information reference (CSI-RS) and so on. In step 320, the UE processes a physical broadcast channel (PBCH) to obtain system information block (SIB) messages for one or more carriers, for example, SIB1, SIB2 etc. In step 325, the UE processes SIB messages to obtain system information, for example, downlink control (DCI) information, associated with the corresponding component carriers. DCIs can provide information about the transmission parameters (for example, modulation and coding scheme parameters (MCS) etc.) used to transmit the respective candidate carriers. In step 330, the UE processes CRSs on the candidate carriers to estimate a channel quality associated with each of the respective candidate carriers.
[068] In steps 335, the UE performs the cell selection based on the channel quality (for example, channel quality information) estimated in step 330. In steps 340 and 345, the UE starts monitoring the selected carrier and performs a random access transmission (RACH) of the uplink transmission to request resources from the selected carrier to be programmed for the UE. In step 350, the UE transitions from an RRCJDLE mode to an RRC_CONNECTED mode. This can be achieved by exchanging messages with an access node associated with the respective carrier, for example. Similar procedures can be considered for 3GPP NR, with potentially different terminology or notation.
[069] At meeting number 71 of the 3GPP radio access network (RAN) (RAN meeting # 71), the new 5G study item on the new radio access technology (RATO) was approved, with the aim of identifying and develop the technology components needed to successfully standardize the NR system to 5G. Next, considerations about physical layer procedures and the design and configuration of SR for oriented access to the UE were discussed.
[070] The following deployment scenarios are important for cellular systems and were supported by 3GPP LTE. They must be supported for NR and possible improvements and optimizations can be considered for these deployment scenarios.
1) The EU density is higher (or much higher) than the TRP or carrier density - This is a typical scenario in 3GPP LTE. In NR, the density
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15/70 EU can be even higher than in 3GPP LTE. The NR project must provide efficient support for this scenario (for example this scenario is more suitable for measurement based on DL).
2) The density of TRP or carrier is higher (or much higher) than the density of UE - This can be a result of network densification and is an important scenario to be considered and sustained efficiently in NR. The design principles can be quite different from the scenario above; for example, UL-based measurement, UE-oriented access etc., may be more suitable for this scenario.
3) A network generally includes both TRPs and carriers that support the initial access procedure and TRPs or carriers that do not support the initial access procedure. Some TRPs or carriers need to support initial access procedures (such as transmitting SS directly detectable by the UE) and related functionality, referred to as independent TRPs (SA) (simply SA for short) while some others do not need to support initial access procedures, referred to as non-autonomous TRPs (NSA) (simply NSA for short). Not all TRPs or carriers need to support initial access procedures. To help reduce the strokes and complexities of the network, a network, especially a dense network, generally includes fewer TRPs or carriers that support the initial access procedure than those that do not. NSA TRPs or carriers can be accessed through some assistance from SA TRPs or carriers.
[071] Therefore, NR must support 3GPP LTE deployment scenarios, including those with high EU or TRP density or carrier density and with a subset of TRPs or carriers that support the initial access procedure.
[072] The above scenarios are generally common for both NR and 3GPP LTE. However, NR has some new features that are different from 3GPP LTE. As an example, NR will support high frequency carriers with narrow beam transmissions, possibly through an analog beam shape. As another example, NR operates with “light carriers”. More specifically, with network densification and requirements for greater flexibility in operation, light carriers with
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16/70 reduced common overhead especially CRS are considered for NR.
[073] As previously discussed, transmit power control (such as uplink transmit power control) is an important element of 3GPP LTE, achieving a desirable balance between interference management and throughput performance for various scenarios. As an example, uplink transmit power control balances uplink interference management and uplink throughput performance. Transmission power control must be supported by NR, with improvements, according to new scenarios and NR requirements. This is observed although the discussion presented in this report focuses on the control of uplink transmission power, the modalities of the example presented are operable for control of downlink transmission power. Therefore, the focus on uplink transmission power control should not be construed as limiting the scope or spirit of the example modalities.
[074] The following scenarios can be considered for the control of uplink transmission power in NR. It should be noted that some scenarios presented in this report are new and are not present in 3GPP LTE while others may have been discussed in 3GPP LTE but not supported.
- Without CRS: The upstream transmission power control in 3GPP LTE is based on the path loss (PL) that is estimated on the downlink. The PL estimate is obtained based on CRS. However, it is likely that CRS is not present in NR. Consequently, the PL estimate must depend on another RS or a new mechanism.
- Beam-based transmissions or receptions: In NR, transmissions and receptions can be based on beams, potentially very narrow beams especially at high frequency (HF) or massively multiple input and multiple output (MIMO) implementations. In addition, the beam widths and, therefore, the beam formation gains between the same access node and the UE can vary significantly, for different times and channels. There are two main implications for transmissions or receptions
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17/70 based on beam:
- the UE transmission becomes a narrow beam and the reception of the access node also becomes a narrow beam. The likelihood of a narrow beam uplink transmission interferes with narrow beam reception with another access node that is generally low. Consequently, the need for very precise uplink transmission power control to reduce interference becomes less critical in NR than in 3GPP LTE.
- Narrow beam transmissions and receptions cause variations in receiving power due to differences in beam formation. As an example, a UE sees a higher receive power on the downlink as the downlink beam is refined and becomes narrower and the access node sees a higher receive power on the uplink as the uplink beam is refined and becomes narrower. The fact that the downlink receiving power must be used for the PL estimate and the fact that the uplink receiver power must be used as the transmit power control operating point needs to be determined.
- Analog beam formation at access nodes or UEs: NR HF can adopt analog beam formation at access nodes and UEs. In order to transmit and receive with the analog beam formation, the analog direction must be known before transmission and reception (for example, a transmission on a physical uplink shared channel (PUSCH)) can occur. In scheduled transmissions, knowledge of the analogous direction is not a problem. However, in unscheduled transmissions (for example, a contention-based RACH transmission or an uplink signal without concession) lacking knowledge of the analog direction may require the reception of the transmission with one more broader analog beams at the access with no or low gain of analog beam formation. The use of the broad analog beam should be reflected in the adjustment of the power level of the uplink transmission.
- Uplink CoMP: The Uplink CoMP in NR can be similar to the 3GPP LTE Rel-11 CoMP but can be found more often in NR. Therefore, the uplink CoMP must be
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18/70 considered as an important scenario for NR especially the aspect of uplink transmission power control. In 3GPP LTE Rel11, an uplink transmission power control setting based on a service cell is used by a UE for all service access nodes, therefore, the signal power levels received at some service nodes access may be greater or less than expected. One issue to consider is how uplink transmission power control can be enhanced to better support uplink CoMP.
- Multiple numerologies: A UE can support multiple numerologies and how uplink transmission power control should be configured for different numerologies should be discussed. A numerology can specify the subcarrier spacing, subframe or interval or symbol durations, the bandwidths of the carriers or parts or sub-bands of bandwidth, CP lengths, carrier frequency, possible time settings or block frequency or SS bursts and so on.
- Uplink signal transmissions without previous reception of the downlink transmission from a potential destination access node: In NR, it may be useful to introduce a new uplink signal referred to as an uplink signal. The uplink signal is transmitted by a UE to allow neighboring access nodes to discover the UE without depending on the downlink transmissions from the access nodes. In this scenario, the UE does not know the destination uplink signals, nor does the PL estimate the channels for the destination. How the UE defines its uplink transmission power level is a topic for discussion.
- Dynamic TDD (D-TDD) may require improved control of the uplink transmission power control level to reduce interference from UE to EU: D-TDD is a flexible and dynamic evolution of interference mitigation and adaptation enhanced traffic (eMITA). The improvement of the double loop uplink transmit power control introduced in eMITA which is dependent on the subframe set may become insufficient and the link transmit power control
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Upward 19/70 should be further improved when considering D-TDD.
[075] Projects or enhancements for uplink transmission power control may include:
- First, the 3GPP LTE uplink transmission power control, referred to as fractional power control (FPC), provides a general framework and is expected to work well for any OFDM or OFDM based communication system in a single carrier (SCOFDM). The general form for the EU transmission power is expressable as. PCMAxÚX
P (i) = min]>
[10log ₁₀ (M (0) + P _o (j) + a (j) PL + Δ ^ ζί) + / (0J J where P (i) is the transmission power in a carrier (or cell, part of the width bandwidth (BWP) and so on) for subframe i, Pcmax (/) is the UE transmission power configured in subframe / for carrier, M (i) is the bandwidth factor, Po is a parameter of open loop power control displacement, α (or equivalently, alpha) is the open loop power control scheduling parameter, PL is the path loss estimate, ATf (/) is the MCS factor and / ( /) is the adjustment state of the closed loop power control (or simply loop state, loop status, loop state value, and so on). The UE transmit power captures the maximum UE power, the bandwidth allocation factor, open loop power control, MCS factor and the closed loop offset. Clearly, the transmission power to the UE is comprehensive and flexible and can be used as the line the base for the structure for power control of uplink transmission in NR.
[076] If the accumulation is configured, that is, / (/) = / (/ - 1) + õ (iK) then δ is the closed loop correction value (also referred to as a TPC command) and / ( /) is the closed loop power control adjustment state or the loop state. If the accumulation is not configured, that is, absolute closed loop power control, f (i) = õ (iK), then the closed loop power control adjustment state or the loop state is ο δ or the TPC command and the loop is really out of memory. Multiple subframe sets can be configured and each subframe set can use a set of open loop power control parameters (ie α and Dust) and their own loop state. But subframe sets can
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20/70 share the same PL and δ (the TPC command).
[077] Figure 4 illustrates 400 power control parameters in 3GPP LTE. Power control parameters 400 in 3GPP LTE can include PUSCHs configured for CCs 405 with parameters a (or equivalent, alpha), Po, optional TPC features and RNTI for each PUSCH, PUCCHs configured for CC 410 with Po parameters and features of Optional TPC and RNTI for each PUCCH, as well as TPC and RNTI features that are implied in DCI 415. It should be noted that PL may not require the 420 configuration. It should be noted that there is a strict association between a power control setting and an associated signal in 3GPP LTE.
[078] Nevertheless, some variations or improvements can be introduced in NR to address new scenarios previously described. Some options are listed for additional consideration:
- No CRS for PL estimate: One option is that PL estimates can be based on DRS, SS, non-UE downlink RS or other long-term downlink RS.
- Beam based transmissions or receptions: The PL estimate can be based on beams, ie beam specific PL estimates can be used. In addition, narrow beam downlink RSs may not provide a robust estimate of PL and the high gain of associated beam formation may cause the UE to underestimate the PL. Therefore, wide beam downlink RSs can be used for PL estimation, which can lead to uplink power levels above what is necessary if the transmission is narrow beam. However, as previously described, the use of narrow beam transmissions may not interfere with other access nodes due to the narrow beam nature of the transmissions.
- The formation of an analog beam at the access node or UE: In order to support uplink transmissions without concession, the access node may need to use a broad analog beam and, consequently, the uplink transmission power control for any transmission without concession must not be based on a narrow beam downlink RS. One option may be to use long-term, wide-beam downlink RSs in the estimate of PL and uplink transmission power control for all uplink transmissions without concession.
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- Uplink CoMP: A potential enhancement may be to specify uplink transmission power control settings specific to the access node for uplink CoMP. That is, the UE applies different uplink transmission power control settings for different access nodes. This can also be generalized to cover multi-beam uplink transmissions.
- Multiple numerologies: For multiple numerologies, multiple uplink transmission power control configurations can be provided. In other words, a UE with multiple uplink numerologies may need to support multiple numerology-specific uplink transmit power control configurations.
- Uplink transmission without previous downlink transmission reception: The UE may be unable to obtain a PL estimate. The access node in service can signal an estimate of PL (or uplink transmission power) to the UE and the value signaling can be estimated by the access node based on, for example, density of the access node near the UE, any other side information and so on. Any other information may be implementation dependent.
- D-TDD: More advanced techniques for determining the level of interference from EU to EU and adjusting the uplink transmission power level can be considered. Due to the dramatic fluctuation of interference levels in the time domain, instantaneous and accurate measurements or sensors may be required to allow for further enhancement of the uplink transmission power control for D-TDD.
[079] It should be noted that the control of transmission power in NR can be quite diverse and complicated. Therefore, a unified power control structure in NR is required. In addition to directly providing the power control values, a power control setting may necessarily include essential elements and optional elements., According to one example mode, power control settings can be specified with the essential elements, together with one or more optional elements. UE behavior
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Corresponding 22/70 is well defined. Multiple power control configurations can share some common elements.
[080] In a modality, a first essential element is a resource of time, frequency, antenna, antenna port, beam or panel for uplink transmission. Resources can be defined, according to channel and signals, such as PUSCH, physical uplink control channel (PUCCH), audible reference signals (SRS), RACH and so on. A channel or signal type can correspond to one or more types of resources, depending on the channel or signal properties and resources. The different types of uplink resources can use different power control settings. As an example, PUSCH and PUCCH use different features and have different properties, so different power control settings are used. As another example, PUSCH with persistent programming and PUSCH programmed by DCI can have different Po values and therefore different power control settings (although the same α values can be shared). As yet another example, PUSCH with one beam can use a different power control setting for PUSCH with another beam, but if the corresponding receiving beams on the receiving side (ie, the network side) have certain QCL ratios, the Power control configurations can share some common elements. Similar distinctions are true for other channels and signals, such as PUCCH, SRS, RACH, as well as newly introduced signals or channels.
[081] In a modality, a second essential element are parameters used to determine the power level. The parameters mainly include two types: semi-static power control parameters and dynamic power control parameters. Semi-static power control parameters are typically essential to determine the power level and include α and Po (which can be the target power level received) or the equivalent, which are often referred to as open loop power control parameters . Power ramp values can also be included as semi-static power control parameters. In some cases, the transmission power level or a reference factor can be specified so that a UE can determine the
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23/70 transmission based on it. The semistatic power control parameters can be configured (or specified) for a UE through RRC signaling.
[082] Dynamic power control parameters include loop states, closed loop TPC command and bandwidth adjustment factors or MCS. TPC commands can be of an absolute or cumulative nature. In existing systems, TPC commands can be 1 bit or 2 bits for PUSCH, PUCCH or SRS and 3 bits for 3 PUSCH messages in RACH procedures. TPC commands are typically carried in DCI, but for the case of RACH, TPC commands are carried in a random access response (RAR). TPC commands can be used for closed loop adjustment and can be useful for adjusting exact transmit power levels. However, TPC commands may not be present in all power control configurations. Loop states can determine how many power control loops (ie closed loop) are configured for the UE and need to be maintained. For absolute TPC commands, the loop state is the same as the TPC command and has no memory. Otherwise, the loop state is a cumulative sum (an integral) of the TPC commands associated with the loop. In 3GPP LTE, the loop state does not require any configuration signaling, but is specified in the technical standards of 3GPP LTE in a simple way and its association with other elements is also specified in the technical standards of 3GPP LTE. However in NR, the loop state may need to be associated with other elements in more complex ways. As an example, to take flexibility into account, the configuration signaling for loop states may need to be designed. Some of the associations can still be defined in the associated technical standards, but some can be configured in RRC signaling and in the most flexible cases, when and which loop state to be used for an uplink transmission can be specified in MAC or PHY signaling. One mode is to provide information about which loop state (specifying a loop state index, for example) to be used in DCI in the TPC command.
[083] Another element is the PL estimate used in power control. The PL estimate can be generated, according to link RS
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24/70 downlink or uplink RS or even without RS. Based on RS, the receiver can obtain the values of power received from the reference signal (RSRP). Then, by removing the transmit power (TxP) associated with the RS, the PL estimate can be obtained. As an example, PL = TxP RSRP per port, where each TxP port is generally the reference signal strength signaled to the UE for an associated RS or SS. When multiple antenna ports, panels, etc., are used for RS, RSRP per port must be used and TxP per port must be signaled from the transmitter side to the receiver side (otherwise, if the TxP total is flagged, the number of ports must also be flagged). This should apply to all RS or signals in the PL estimate, for example, SS (SSS in particular), physical broadcast channel DMRS (PBCH), CSI-RS, PDSCH DMRS if used for calculating RSRP, link signals upward for the net PL estimate etc. In general, the number of ports for the RS can be signaled to the receiver. Therefore, if the receiver receives RS from multiple RS ports, the receiver can correctly use the TxP per corresponding port to determine the PL estimate. It should be noted that a port on a first RS can actually be a layer or stream formed by multiple ports on a second RS and the transmitter must adjust the power so that the TxP per port of the first RS is equal to the TxP per port of the second RS RS or signal the TxPs by port of the first and second RSs to the receiver. In one embodiment, when no PL estimate is available, the power rise from an initially small power value can be used.
[084] An example of a PUSCH PC setting can be configured as follows. The network configures PUSCH on a component carrier (CC) or BWP associated with an access node and uses DCI or RRC to specify the time or frequency resource allocation for the PUSCH. The power control parameters configure the α and Po semistatic power for PUSCH driven DCI and another set of α and Po semistatic power control parameter for semi-persistent PUSCH. The network configures a closed-loop TPC command for PC tuning, such as the temporary radio network identifier (RNTI) associated with a DCI group and the TPC command bit allocation information for the tuning control setting. power within the DCI group. The configuration of the TPC command can also be
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25/70 specified in a standard specification if the DCI is dedicated to the UE. The loop state is specified as separate from PUCCH, PUSCH in subframe set 2 in TDD, and so on. That is, there may be 3 loops for the UE to maintain: 1) PUSCH (in the subframe set 1 in TDD), 2) PUCCH and 3) PUSCH in the subframe set 2 in TDD. The network configures several sets of the downlink RS, among which one is configured for this power control setting, such as a CSI-RS and the TxP per port is signaled to the UE. The UE then uses CSI-RS to measure RSRP per port (if multiple ports are present, the first port can be used or the RSRP for all ports can be determined and the average RSRP is used as the RSRP per port) and subtract the RSRP from the TxP per port to obtain the PL estimate associated with the CSI-RS and, consequently, with the power control adjustment. PL estimation and open loop PC parameters are used to generate the open loop power control value. This value can be further updated based on the TPC value and the bandwidth factor associated with a PUSCH transmission and applied to the PUSCH transmission.
[085] The power control adjustment methodology above can easily be extended to multiple PUSCH power control configurations, one or more PUCCH power control configurations, one or more SRS power control configurations and with appropriate modifications, one or multiple PRACH power control configurations. Multiple power control settings may be required for one type of channel, for example, PUSCH, due to multiple carriers, bandwidth parts, cells, cell groups, access nodes, transmit beams in the UE or on the network, receive beams in the UE or in the network, transmit panels in the UE or in the network, receive panels in the UE or in the network, number of transmit or receive antenna ports in the UE or in the network, RS, numerologies, interference conditions, duplex, allocation of resources in different subframes, subframe or range types etc.
[086] When such multiple power control settings are defined, each power control setting is individually defined and associated with the corresponding uplink signal on the corresponding CC and beam etc. For example, an access node can configure, for a
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UE, an uplink signal (for example, PUSCH) for a CC and a beam. Then, the access node sets power control parameters and resources for the signal, such as α and Po, for the signal on the CC with the beam. If the PUSCH is signaled semi-persistently (SPS), triggered by DCI or free of concession then a first set of α and Po is configured for SPS, a second set of α and Po is configured for PUSCH triggered by DCI and a third set of α and Po is configured for PUSCH without concession. Then, for PUSCH on another CC or with another beam, the access node also configures power and resource control parameters. Similar processes are repeated for other signals (for example, PUCCH, SRS, RACH, UL signal etc.) and other uplink channels, uplink resources, uplink configurations, etc. Alternatively, the settings can be, for each CC, one or more signals are configured and then, for each signal, the multiple parameters of power control and resources are configured for each type (SPS, DCI activated or without concession, with others signals simultaneously or without etc.) and for each beam, numerology etc. and this is repeated additionally for other CCs and so on.
[087] Correspondingly, on the downlink, the network configures or specifies the downlink SS or RS for a CC or beam, configures or specifies downlink SS or RS based on RSRP measurement for a CC or beam and TxP signals per downlink SS RS port to a CC or a beam. It should be noted that not all downlink SS or RS and the associated RSRP need to be configured for the UE due to the fact that the UE may be able to discover the SS or RS, according to pre-defined technical standards or protocols, such as PSS, SSS, DRS, Layer 3 CSI-RS and so on. The UE then obtains a PL estimate for a CC or a beam. Then, the PL estimate per DC or the PL estimate per beam is used if an uplink signal is transmitted. For example, if an uplink signal should be transmitted on a CC associated with a beam where the beam can be an uplink beam (obtained through the beam management process, for example) or a downlink beam for a Downlink RS or SS, the estimate of PL per CC and per beam associated with the beam
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27/70 uplink or downlink beam is used to define the power for the uplink signal.
[088] In the example configurations presented previously, the resources and parameters of TPC can be configured optionally. They may not need to be explicitly configured if the DCI group for TPC commands is not used. For the DCI dedicated to a UE to trigger a PUSCH or SRS or program a PDSCH with ACK or NACK on a PUSCH and so on, the TPC command bit (s) is already included as defined in the standard specifications of the technique. However, to allow greater flexibility, the DCI group for TPC commands can be used. In such a situation, a UE may need to be configured with TPC RNTI (s) for the DCI and the bit locations within the DCI.
[089] Loop states can also be configured optionally. They cannot be explicitly configured for absolute TPC commands. In situations of accumulated TPC commands, loop states sometimes do not need to be configured either, if a TPC command configuration is associated with a type of uplink transmission and a common loop state is used for all of these. transmissions, for example. However, multiple loop states can be specified, even for the same TPC commands and the accumulation performed separately for each loop state. Each loop state can be maintained by the UE and will be updated until the next TPC command associated with the loop or loop state is received (the next TPC command can be specified in RRC, MAC or PHY signaling or in technical specifications pattern.
[090] Multiple TPC commands with different parameters or settings can be assigned to the same loop or loop state to reduce loop overhead. Multiple loops or loop states can be assigned to a set of TPC command settings or parameters to reduce TPC overhead. Although the relationship between the loop or loop state and its associated TPC command can be complicated and there are many different mappings, in the example modalities presented in this report, the loop or loop state and its associated TPC command are used interchangeably for questions brevity unless otherwise
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28/70 specified. The loop or loop state and its associated TPC command can be referred to as closed loop PC parameters.
[091] An example mode related to configuring multiple power control settings can be as follows:
- The network configures multiple sets of downlink RSs and transmits the downlink RSs to the UE to receive. Network access nodes can also send SSs (which may not require configuration signaling) and the UE receives the SSs. Downlink RSs and SSs comprise an element of the power control settings.
- The network configures one or more uplink transmissions and their associated resources. One or more uplink transmissions and associated resources comprise another element of the power control settings.
- The network configures resources and parameters for multiple closed-loop TPC commands. The network configures multiple sets of parameters for semi-static power control. In order to limit complexity, a maximum number of semi-static open loop power control parameter sets can be defined as a pre-defined first limit and a maximum number of dynamic open loop power control parameter sets can be defined as a second predefined limit, with the second predefined limit being the same or different from the first predefined limit. It should be noted that the second predefined limit may be less than the first predefined limit because it can be more complex to maintain multiple power control loops.
- A power control setting can be configured by specifying: one or more uplink elements configured for the UE, one or more sets of open loop power control parameters for the UE, optionally one or more power control parameters closed loop for the UE and parameters or settings to obtain an estimate of PL for the UE, where the PL is associated with an RSRP from a downlink RS. Multiple power control settings can be configured.
- To simplify power control settings or their signaling: downlink RSs (or associated RSRP measurements)
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29/70 can be indexed, open loop power control parameters can be indexed, closed loop power control parameters can be indexed and these indexes are used in the power control setting. The power control setting can also be indexed. The uplink signal, transmission or resources can also be indexed and used to configure a power control setting. Alternatively, indexing cannot be used for the different elements, but the power control setting is configured for each of the different elements.
[092] An example modality related to the configuration of multiple power control configurations can be the following:
- The network configures multiple feature sets and parameters for multiple closed loop TPC commands and open loop power control parameters and a maximum number of power control sets is set to limit complexity. The network configures multiple sets of parameters for potentially different semi-static power control from existing power control settings, closed-loop and open-loop power control settings and configurations can be specified when configuring uplink transmissions. . Instead, closed-loop and open-loop power control parameters and settings can be specified separately from the uplink signal settings and closed-loop and open-loop power control parameters and settings are linked to an uplink signal configuration and, optionally, an RS configuration. When such a link is provided, a power control setting is defined.
- A set of open loop power control parameters can be connected to one or more sets of RS. A set of closed loop power control parameters can be connected to one or more sets of RS. A set of open loop power control parameters can be connected to one or more sets of uplink resource transmission. A set of closed loop power control parameters can be connected to one or more sets of uplink resource transmission. It should be noted that many combinations are possible as flexibly enabled for linking elements to define
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30/70 multiple power control configurations.
- Sets of power control parameters can be indexed with unique identifiers and each identifier is configured for one or more uplink signals and, optionally, one or more RSs for PL estimates. In this report, the downlink RS (or the associated RSRP measurement) can also be indexed. That is, for an uplink signal, if a power control parameter index is provided and, optionally, a downlink RS or RSRP index is provided then a power control setting is defined. This can be done in RRC configuration signaling, MAC and PHY DCI signaling which are used to trigger (directly or indirectly such as ACK or NACK) the uplink signal or PHY DCI which is used to provide information about the TPC commands.
[093] In an example embodiment, a DCI can provide information about the power control for PUSCH from a UE in a CC and together with the TPC command for the PUSCH in the UE CC, an index of set of control parameters open loop power is specified and, optionally, a downlink RS or RSRP index is also specified. This specifies a power control setting for the UE to use in the subsequent or corresponding PUSCH power control. The DCI can be a DCI group (RNTI associated with UE PUSCH in the CC, for example) or a UE specific DCI for an uplink grant. If PUSCH has multiple types (such as wide beam width PUSCH or narrow beam width PUSCH, first PUSCH numerology or second PUSCH numerology etc.) then type information should also be provided in the associated DCI (unless that the UE can determine the type based on the implicit link to the downlink RS or RSRP (for example, wide beam width downlink RS or narrow beam width downlink RS, for which the UE uses width wide or narrow beam, respectively, to receive) or RNTI, CRC, DCI format or the set of open loop power control parameters). This can be applied similarly to PUCCH, SRS, PRACH or other signals.
[094] In an example embodiment, a DCI can provide information about the power control for PUSCH from a UE in a DC and
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31/70 together with the TPC command for the PUSCH in the UE CC, optionally a downlink RS or RSRP index can also be specified. The TPC command is configured to be associated with a set of open loop power control parameters or multiple sets of open loop power control parameters (determining which to use is described below). This specifies a power control setting for the UE to use in the subsequent or corresponding PUSCH power control. The DCI can be a DCI group (RNTI associated with UE PUSCH in the CC, for example) or a UE specific DCI for an uplink grant. The network can configure the UE with several sets of closed loop power control parameters and each set is associated with one (or more) set of open loop power control parameters. Each set of closed loop power control parameters is also associated with one or multiple uplink signals, channels or resources. When the corresponding DCI is detected by the UE, the UE knows which set of closed loop power control parameters will be applied. If PUSCH has multiple types (such as wide beam width PUSCH or narrow beam width PUSCH, first PUSCH numerology or second PUSCH numerology etc.) and if some types are associated with different sets of loop power control parameters then type information also needs to be provided in the associated DCI (unless the UE can determine the type based on implicit link to the RS or downlink RSRP (for example, wide beam width downlink RS or RS narrow beam width downlink, which the UE uses wide or narrow beam width to receive) or RNTI, CRC, DCI format or the open loop power control parameter set). If none of this is used to determine which open loop power control parameter set should be used, the network selected open loop power control parameter set index for PUSCH may need to be flagged explicitly. The index can be specific to each set of closed loop power control parameters, in which case different sets of closed loop power control parameters are assigned with their respective sets of open loop power control parameters or can be common to all sets of
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32/70 closed loop power control parameters. This can be similarly applied to PUCCH, SRS, PRACH or other signals.
[095] In an example mode, some of the association interfaces are not specified along TPC commands to help reduce DCI overhead. For example, which PL estimate should be used for which uplink signals of what type can be specified in RRC or MAC signaling or by technical standards. In an example embodiment, all PUSCH, PUCCH, SRS of a first type (for example, wide beam width, such as one associated with Layer 3 SS or CSI-RS reception) must use the same PL estimate (for example, example, derived from Layer 3 SS or CSI-RS). In another embodiment of the example, all PUSCH, PUCCH, SRS of a second type (eg narrow beam width, such as one associated with CSI-RS for PUSCH measurement CSI, CSI-RS for beam management, CSI-RS for RSRP Layer 1) they must use the same PL estimate (for example, derived from the associated CSI-RS). This can also be seen as a QCL ratio in terms of beam width (or beam formation level, beam formation gain, etc.), that is, uplink signal, channel or resources are transmitted and received on QCLed ports with antenna ports in which some downlink signal, channel or resources are received and transmitted. In yet another embodiment of the example, all uplink and downlink signals are grouped into groups in which at least one group of uplink or downlink signals is used or can be used before the beam management or refinement process or without the results of a beam management and refinement process and at least one group of uplink or downlink signals is used based on the results of a beam management and refinement process. The signals within a group have a QCL relationship in terms of beam width. For example, the group formed above can be all based on or QCLed in a bundle, signal or SS ports or a bundle, signal or CSI-RS Layer 3 ports of the service cell. For example, the last group above can be based on or QCLed on a beam, signal or CSI-RS ports for CSI measurements or beam management or Layer 1 RSRP, using beams likely narrower than the above group, thanks to beam management
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33/70 resulting in finer beams for data.
[096] These associations or relationships can be standardized or configured by the network for the UE, so that they do not need to be signaled to the UE using MAC or PHY signaling. If a signal type (for example, PUSCH, SRS or PUCCH) is assigned to more than one group, before the signal is transmitted, the network may need to configure or provide information about the selected group. One example mode uses a group index and signals the index. Another embodiment of the example uses QCL or a reference port or transmission ratio specifying that this signal is QCLed or associated with another signal, reference port or uplink or downlink transmission. It should be noted that for brevity, the terms “wide”, “wider”, “narrower”, “narrower” can be used to the fullest extent and can be more precisely understood as the definitions above. Similarly, the term “bundles” can be understood as pairs of bundles (i.e., associated Tx bundles and pairs of Rx bundles) based on context or sometimes referred to as bundle bundle connections (BPLs). The beams can also be understood as a spatial assumption of QCL linking the specified transmission to another signal (for example, RS and SS).
[097] In an example mode, a first power control setting shares some parameters and settings for a second power control setting, including the, Po and TPC command, but an additional offset is configured in the set of parameter settings. open loop power control. For example, for multiple PUSCHs on the same TRP with different beam widths, a first PUSCH with a narrower beam can be configured as a displacement version of a second PUSCH with a wider beam. For example, a PUSCH can be associated (for example, grouped) with a Layer 3 SS or CSI-RS and a power control setting is specified. Another PUSCH can be associated (for example, grouped) with another CSI-RS where this CSI-RS is QCLed with SS or Layer 3 CSI-RS (in terms of mean delay and doppler shift or other weak QCL properties, for example) or as a refined bundle of Layer 3 SS or CSI-RS. The last PUSCH can be specified to reuse the parameters of the old PUSCH power control setting, but with an offset applied. The displacement can be signaled to the UE from
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34/70 of the network, through RRC, MAC or PHY signaling, as in the conclusion of the beam management process.
[098] The offset can be based on the difference between the Layer 3 RSRP from the Layer 1 CSI-RS RSRP or the difference between the Layer 3 PL from the Layer 1 PL calculated by the network (possibly with a additional displacement determined by the network or additional scale such as α of the PUSCH power control setting). The displacement can also be calculated by the UE, based on a difference between the Layer 3 RSRP from the Layer 1 CSI-RS RSRP. The utility of the displacement can be to regulate the PUSCH power such that the density of the power spectrum on the receiver side it can be more uniform for different PUSCH transmissions.
[099] For another example, the open loop power control parameters are set to PUSCH with a standard setting (reference) and an additional offset is set to PUSCH with other settings. In one embodiment, PUSCH can generally use standard numerology (for example, 15 kHz at a lower frequency or 120 kHz at a higher frequency), standard waveform (for example, DFT-S-FDM), standard format (for example, example in an uplink interval), standard beam width etc., which are configured with standard open loop power control parameters such as α and Po.
[0100] When a different numerology (for example, 30 kHz at a lower frequency or 240 kHz at a higher frequency), different waveform (for example, OFDM), different format (for example in a mini interval, a link interval descending-ascending link, etc.), different beam width (for example, wider beam width) and so on, are used, additional offsets are applied. Additional offsets can generally be configured on RRC signaling for different scenarios. Additional displacements can also be signaled in, for example, MAC or PHY when numerology, waveform, format etc., are signaled as changeable. The latter may be more flexible, but requires more signaling overhead on fast timescales.
[0101] In one mode, the two types of PUSCH described above (and some other types of signals) can share the same PC setting
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35/70 except for the associated RS, RSRP or PL. L3 CSI-RS, RSRP or PL is used for one type and the other type uses another PL generated from another set of RS or RSRP, such as CSI-RS for L1. The displacement is not necessary since it is accounted for in the differences in PL estimate. Which PL to use for a particular PUSCH is specified or determined as described elsewhere in this specification.
[0102] In one mode, the two types of PUSCH described previously (as well as some other types of signals) can share the same power control setting except for the associated RS, RSRP or PL. Layer 3 CSI-RS, RSRP or PL is used for one type of PUSCH and the other type of PUSCH uses another PL generated from another set of RS or RSRP, such as CSI-RS for Layer 1. The offset it is not necessary due to the fact that it is already accounted for in the PL estimate differences. Which PL to use for a particular PUSCH is specified or determined as described in this report.
[0103] In one mode, the two types of PUSCH described previously (as well as some other types of signals) can share the same power control setting. This results in different power spectrum densities on the receiver side, but as the network can be aware of this beforehand and different link adaptations (ie MCS levels, ratings, resource allocations and so on) can be used to total advantage.
[0104] In one mode, a set of closed loop power control settings is shared with multiple power control settings. In order for the network to adjust the power for different signals, TPC commands with a possibly greater range of power control adjustment values can be used. Cumulative TPC commands may not be suitable for this case, unless one type of signal is transmitted for a relatively long time without other types of transmitted signals, for example. In more general cases, absolute TPC commands should be used for these different types of signals. In order to increase the range of TPC commands, 2 bits or even 3 bits (as defined in RAR) or more can be used. Another way of not increasing the DCI bit width is to signal the UE that a different power control resolution
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36/70 is applied. Multiple sets of power control resolutions, for example, 2 bits, can be predefined and indexed and one of them is selected for a UE for one or more power control configurations. The network can also modify the resolution by signaling a new index in RRC, MAC or PHY signaling, for a group of UEs or an UE. The advantage of this is that no additional DCI formats need to be defined, but a new interpretation of the already defined DCI formats is allowed by the appropriate signaling.
[0105] In one mode, a loop of two TPC command configurations is defined. One of the TPC command configurations is used for accumulation, that is, it is used to be added to the current loop state and transported to the next instances and the other is not used for accumulation, that is, it is applied once at the current moment. . For example, / 1 (/) = / (/ - 1) + Õ1 (iK) and / 2 (/) = / 1 (/) + δ2 (/ - / <), where Õ1 is cumulative and Õ2 is not and the UE maintains / 1 (/) only; e / 2 is derived from / 1 and Õ2 and is applied to obtain the power control value. This helps multiple types of signals to share the same loop or common loop state, that is, / 1 (/) and Õ2 can be different for different signals, which prevents unwanted interactions between the signals.
[0106] In one embodiment, an access node, TRP, cell, carrier or part of the bandwidth to which a UE is connected may not have any Layer 3 SS or CSI-RS observed by the UE. In this case, the UE may have been connected by the TRP, cell, carrier or part of the bandwidth through an uplink mobility procedure or a non-persistent Layer 3 SS or CSI-RS configured for the UE and after establishment of the connection, the narrow beam most directly associated with data transmissions is maintained. The UE may then need to counter only with CSI-RS for CSI or beam management and Layer 1 RSRP or similar for RP downlink RS and PL estimate. In other words, all uplink transmissions associated with this access node, TRP, cell, carrier or part of the bandwidth can be the narrow beam width and uplink power control for these transmissions is based on the estimate corresponding PL.
[0107] In one embodiment, an access node, TRP, cell, carrier or part of the bandwidth to which a UE is connected transmits Layer 3 SS or CSIRS (which can also be configurable and periodic to the UE) and is
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37/70 observed by the UE, even after the UE and the TRP selected the narrow beam for higher rate data transmission. In other words, the UE maintains multiple beams of different beam widths for the same access node (although the UE may not have to know whether they are from the same access node or not, but the UE knows certain QCL relationships between them). In this case, the uplink transmissions can be wide-beam or narrow-beam. Wide beams are suitable for robustness of the beam connection while narrow beams are suitable for a higher data rate. Therefore, for uplink data transmissions, narrow beams may be preferred whereas for control or other transmissions, wide beams may be preferred. If both are supported for a signal, the beam type will need to be specified as previously described.
[0108] However, for SRS used for the formation and classification of precise downlink beams, MCS or resource allocation, narrow beams associated with PDSCH may be preferred, otherwise wide beams may be used. The UE can differentiate or be signaled to differentiate these cases and apply the corresponding power control. In an embodiment in a deployment with different signals with different beams (for example, different beam width or different beam directions), each is configured with a power control setting, including open loop power control parameters, parameters closed-loop power control, respectively its downlink RS, etc. In an embodiment in a deployment with different signals with different beams (for example, different beam width or different beam directions), some signals can be configured with a common set of open loop power control parameters and control parameters of closed loop power, but are configured with their respective and different downlink RS for PL estimates. In a deployment mode with different signals with different beams (for example, different beam width or different beam directions), some signals can be configured with a common set of open loop power control parameters, but are configured with their respective and different closed loop power control parameters and downlink RS for PL estimation. In a modality in a deployment with different signals with beams
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38/70 different (for example, different beam width or different beam directions), some signals can be configured with a common set of closed loop power control and downlink RS parameters for PL estimation, but are configured with their respective and different open loop power control parameters. These modes above can be used for different scenarios and constitute specific beam power control. Similar designs can be made for specific power control of specific numerology of specific waveform subframe set etc.
[0109] In one mode, the PL estimate is obtained on the network side. This can be for uplink based mobility, uplink signals, carriers or parts of the bandwidth without a downlink to a UE or carriers or parts of the bandwidth where the uplink or downlink asymmetry is serious or reciprocity is not maintained. The uplink power control must depend on the uplink RS for the PL estimate on the network side and then signaled to the UE. For initial power control, the UE can be configured with an initial power value to be used and the power increase can be used. The power increase can be autonomous if the connection has not been established, similar to the regular RACH power control except that the regular RACH is configured with the initial destination power and to perform the PL estimate on the downlink while the signal can be configured with the initial transmission power. The same power boost settings for regular RACH power control can be reused in this report. It should be noted that this signal may be a new special form of RACH. The increase in power can be based on the TPC command on the downlink if the connections are not established. An accumulative TPC can be used. In addition, 3 or more bits can be used for TPC commands. In each case, when the network receives the signal with sufficient PL estimate accuracy, it can signal the PL value to the UE so that the UE can use the value to define other power control settings. It should be noted that the UE needs to signal the TxP per port associated with the successful transmission (which is defined as a transmission recognized by the network) to the network for PL estimation.
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Alternatively, the network can signal the RSRP to the UE and the UE determines the PL estimate based on the TxP for the successful transmission. This PL estimate can be combined in other modalities for the PL estimate element.
[0110] In one embodiment, for a UE on a carrier or part of the bandwidth of an access node, the maximum number of dynamic closed loop power control parameter sets is predetermined, according to technical standards. In 3GPP LTE, the maximum number, although not pre-specified, of sets is effectively 2, one for PUSCH and one for PUCCH or one for SRS on a carrier without PUSCH. NR can be more complicated and to set a limit to complexity, the maximum number of sets may need to be standardized. A possible value is 4 (but other values are possible) to address various forms of transmissions on the uplink. If this maximum value is not sufficient to provide full flexibility to all forms of uplink transmissions, the UE should share a set of closed loop power control parameters (for example, TPC, RNTI commands and bit allocations) between multiple power control configurations, through additional offsets, additional bits in the TPC commands, variable resolutions of the TPC commands etc., as discussed in this report. Similarly, a modality for a UE on a carrier or part of the bandwidth of an access node, the maximum number of sets of semi-static open loop power control parameters is predetermined, according to technical standards although this value greater than the maximum number of sets for closed loop power control.
[0111] In one embodiment, the PL estimate is adjusted based on knowledge of the number of Tx antenna ports, panels, layers, etc., used for RS. If the TxP per port (or per layer) is not signaled to the receiver then the total TxP will need to be signaled or the number of antenna ports, panels, layers etc., used for the RS will need to be signaled. Based on this, the RSRP and PL per port can be determined. This can be useful if the number of antenna ports, panels, layers, etc. used for RS or transmission varies more dynamically than in 3GPP LTE, such as for beam management and different forms of CSI (for example, CSI- RS pre
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40/70 coded with multiple layers). If the total TxP is kept the same for different RS with different numbers of antenna ports then the TxP per port varies. In this case, the total TxP and the number of ports or layers can be used. If, however, the TxP per door or layer is kept the same then the total TxP may vary depending on the number of doors, panels or layers used.
[0112] In one embodiment, an analog beam forming UE (ABF) uses the corresponding ABF receiving antenna to transmit ABF to receive downlink RS for PL estimates. The UE may have limited antenna capacity for transmission on the uplink than on reception on the downlink. For example, the UE can have 2 RF chains in the reception of downlink and form a very narrow reception beam, which is associated with a higher antenna gain and, consequently, an effectively lower PL. However, the UE can have 1 RF chain for the uplink transmission and can form broader beam transmissions (which does not have to be as wide as the initial RACH beam but even wider than its receiving beam), leading the reduction of antenna gains and, consequently, an effectively higher PL. This can be adjusted based on EU estimates of beam formation gain differences on the downlink and uplink and compensate for them.
[0113] However, for some UEs, such estimates may not be available. The UE can then extract the receive signal associated with the RF chain associated with the transmission, if the associated receive signals for different RF chains can be separated. In other words, the UE emulates ABF on the uplink using ABF on the downlink. This can be generalized to, for example, different numbers of antennas on the uplink or downlink (which causes differences in the antenna beam formation gains). The downlink receiving condition of the UE is made similar to the uplink transmission condition although on antennas or RF chains not used for the uplink, such emulation is not necessary. It should be noted that the emulation in this report does not require the UE to receive the RS with an antenna or an RF chain; all can be used on the downlink, but the
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41/70 signals on an antenna or RF chain are extracted for purposes of estimating PL. This may need to be specified in the technical standards as UE behavior or under test.
[0114] In one mode, the SS (for example, the SSS) TxP is signaled to the UE. In 3GPP LTE, SS is not used for PL estimates (CRS is used) and SS TxP is not signaled (and CRS referencesignal Power is signaled). In NR, the UE can use SSS (or in addition, the DMRS in associated PBCH) for SS-RSRP measurements and then generate the PL estimate based on SS-RSRP and SS TxP measurements. In a modality, the RE by (that is, by linear means over all SSS REs) TxP of SSS is signaled. If the spacing of the subcarrier is not fixed in technical standards, the RE by TxP or TxP for each bandwidth of the unit (for example, 15 KHz at low frequency, even though 30 KHz can be used for a subcarrier) can be signaled. The SSS can be QCLed for the PSS, so the SSS TxP can be specified as QCLed PSS TxP or TxP averaged over the SS block including both PSS and SSS. The SSS can be QCLed for DMRS in PBCH. DMRS can also be used for SS-RSRP and if the RE by TxP per DMRS port is signaled to the UE, the UE can also use the RSRP associated with the DMRS to estimate PL. If the DMRS per RE power per port is not the same as the power per RE SSS, the UE may need to consider the difference in the determination of RSRP and PL estimate and convert the results obtained from DMRS, according to the SSS power. In any of the above modes, the power can be signaled in PBCH or in minimum system information. This can be useful if the RACH configuration is also signaled in PBCH or in minimum system information, so that the UE can perform RACH after decoding PBCH or minimum system information. Alternatively, the power can be signaled in another SIB, such as SIB2 as in 3GPP LTE, where the RACH and referenceSignalPower configuration are signaled.
[0115] Figure 5 illustrates the first example of power control parameters 500 for an NR communication system. The power control parameters 500 for an NR communication system are based on 3GPP LTE and can include two elements. A first element 505 includes power control parameters for link signals
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42/70 uplink, such as parameters α (alpha), Po, optional TPC resources and RNTI for each uplink signal of a first type (for example, PUSCH); parameters α (alpha), Po, optional TPC resources and RNTI for each uplink signal of a second type (for example, PUCCH); and TPC and RNTI resources that are implicit in DCI. The first element 505 includes power control parameters for each configured uplink signal. A second element 510 includes parameters for PL measurements, such as parameters for downlink reference signals used for channel measurements and reference signal transmission power for a CC or beam. The second element 510 includes parameters for PL measurements for each PL measurement to be made.
[0116] Figure 6 illustrates the second example of 600 power control parameters for an NR communication system. The power control parameters 600 for an NR communication system are based on 3GPP LTE and can include two elements and add support for beams. A first element 605 includes power control parameters for uplink signals, such as parameters α (alpha), Po, optional TPC resources and RNTI for each uplink signal of a first type (for example, PUSCH); parameters α (alpha), Po, optional TPC resources and RNTI for each uplink signal of a second type (for example, PUCCH); α (alpha), Po parameters, optional TPC features and RNTI for each uplink signal (separately for each beam used); and TPC and RNTI resources that are implicit in DCI. The first element 605 includes power control parameters for each configured uplink signal. A second element 610 includes parameters for PL measurements, such as parameters for downlink reference signals used for channel measurements and reference signal transmission power for a CC or beam. The second element 610 includes parameters for PL measurements for each PL measurement to be made for each beam used.
[0117] Figure 7 illustrates the third example of power control parameters 700 for an NR communication system. Power control parameters 700 are partitioned into multiple groups that specify power control settings. The elements from each group can be configured to specify a power control setting.
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As shown in Figure 7 there are four groups: group A 705, group B 710, group C 715 and group D 720. Group A 705, referred to as uplink signals or resource group, includes parameters that specify uplink signals and can be defined for different CCs or beams. Group B 710, referred to as RS or SS for the PL measurement group, includes parameters for the measurement of PL and can be defined for different CCs or beams. The C 715 group, referred to as an open loop configuration or parameter set group, includes power control parameters (including α (alpha), Po and so on) for different CCs or beams. Group D 720, referred to as closed loop configuration or parameter set group, includes parameters for the loop state, TPC, RNTI and so on.
[0118] Partitioning of power control parameters 700 into multiple groups allows the addition of extra parameters or the addition of additional parameter values for extra signals, beams, etc. in a subset of the groups without impacting the parameters in other groups. Signaling parameters can also require less overhead due to a smaller number of parameters or parameter values per group, thus requiring lower index values, for example. Differential signaling can also be used to reduce signaling overhead. As an example, for all UEs in an EU group a common set of power control parameters can be signaled from a subset of the groups while individual UEs in the EU group can be signaled only for the power control parameters which are different for each EU instead of having to signal the complete set of power control parameters for each EU in the EU group.
[0119] In one embodiment, the elements of the power control parameter groups 700 can be configured using RRC. In one embodiment, the power control setting can be specified using MAC, PHY or DCI signaling (which implies that there are no pre-defined power control settings) and the DCI provides dynamic information on which power control setting to use . In one embodiment, the DCI dynamically provides information about the power control parameters of group C 715 or group D 720.
[0120] Although the discussion describes the specification of an adjustment of
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44/70 power control specifying one or more power control parameters from each of the four groups. However, it is possible to specify a power control setting by specifying power control parameters from a subset of the four groups. As an example, the default values can be set for some of the groups. In such a situation, it is not necessary to specify the default values. In fact, specifying the default values generates additional signaling overhead. For example, standard values of a and Po can be configured, as well as standard loop states, TPC and RNTI. So, only power control parameters from group A 705 and group B 710 need to be signaled for a UE and the UE would use the default values from group C 715 and group D 720. It should be noted that each of the groups can have default values. In addition, each group can have more than one default value. In such a situation, a UE would select a default value, according to a power control parameter specified from another group, for example.
[0121] Figure 8 illustrates 800 relationships between downlink and uplink beams used for power control. As shown in Figure 8, a relationship 815 exists between SS beams and initial RACH beams. Similarly, an 820 relationship exists between Layer 3 CSI-RS beams and other RACH beams. The downlink and uplink beams shown in Figure 8 that are related to each other can be referred to as BPLs. These BPLs can also be referred to as QCLed beams or have QCL ratios.
[0122] How transmission power is measured and defined is another aspect of power control and power reports (PHRs). Total radiated power is a conducted metric that measures the amount of power radiated by antennas in all directions. The total radiated power is usually measurable at the antenna connector and can be seen as the output power of the antenna's power amplifier (PA). The total radiated power can also be referred to as EU output power. In order to avoid confusion with a TRP (transmission-reception point), the total radiated power is represented by the acronym TORP (Total Radiate Power). However, in the literature, TRP is the typical acronym for total radiated power.
[0123] Effective isotropic radiated power (EIRP) or potency
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45/70 equivalent isotropic irradiated, is a radiation metric that measures the amount of power radiated by antennas over a single direction, which includes directivity (beam formation gain of the directional antenna in that direction). EIRP cannot be measured at the antenna connector and is usually measured over the air (OTA). The peak EIRP, usually the EIRP along the antenna's sights (the maximum gain axis of a directional antenna and is often the antenna's symmetry axis), is obtained with maximum TORP output by the EU PA and maximum antenna gain across the crosshair (such as applying a DFT codeword across the crosshair), can be determined as
EIRPmax__boresight = TORPmax + Gmax_boresight (1) where TORPmax is the maximum TORP and Gmax_boresight is the maximum gain of the antenna across the crosshair. Equation (1) is for the aiming direction and the total TORP power is used for the transmission.
[0124] Figure 9 illustrates a radiated power diagram 900 for an example of directional antenna. A first curve 905 represents TORPmax for the antenna and a second curve 910 represents the EIRPantenna envelope for the antenna. It should be noted that TORPmax is independent of the angle in relation to the aim while the EIRPantenna varies as the angle changes. As expected, the antenna's EIRP maximizes at the elRPmax_boresight crosshair. It should be noted that although the radiated power diagram 900 is presented as a two-dimensional diagram, a real diagram for an antenna is three-dimensional.
[0125] In general, the total power radiated from the antenna at a particular angle is a sum of the antenna's TORP and the Gantenna at a particular angle. As an example, curve 915 represents the maximum radiated power of the antenna and is a sum of Gantenna 917 at the crosshairs and TORPmax 919. As another example, curve 920 represents the maximum radiated power of the antenna at angle α (in relation to the crosshairs) and it is a sum of Gantenna_a 922 and TORPmax 919. However, the antenna does not need to transmit at full power. In such a situation, the real power radiated at angle β (in relation to the crosshairs and shown as curve 925) is a sum of Gantenna_p 927 and TORPactuai 929. The radiated powers are expressable as
EIRPmax_a = TORPmax + G max_a (2) e
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EIRPactual_p = TORPactual + GactualJB (3)
[0126] So in any direction, TORP eIRP and antenna gain are related. In addition, any amount can be deducted from the other two amounts. This relationship can be useful in converting quantities based on EIRP to quantities based on TORP and vice versa.
[0127] It should be noted that the maximum antenna gain over one direction can be generated from pre-coding using the DFT codeword in that direction. If the analog beam formation is generating by introducing certain bit combinations into the analog phase shifters, a DFT code word may not be generated accurately. The maximum gain of the antenna over a direction may not be precisely known to the UE and the maximum EIRP envelope (for example, curve 910) may appear to have a complicated, not smooth shape. In one embodiment, some UEs may be able to estimate their antenna gain for a given bit combination for the phase shifters although with a certain estimation error tolerance (for example, 0.5 dB to 1 dB in one direction although other values are possible). In one embodiment, some UEs may be able to estimate their antenna gain in all directions although with a certain estimation error tolerance (for example, 0.5 dB to 1 dB in one direction although other values are possible). In one embodiment, some UEs may not be able to estimate their actual antenna gains for a given combination of bits for phase shifters or for a given direction, but UEs may be able to estimate their primary antenna gain for a given direction. In one embodiment, some UEs may not be able to estimate their maximum antenna gain for a given direction. In one embodiment, some UEs may not be able to estimate their maximum antenna gain for any given direction, but UEs may estimate their maximum antenna gain for one or more directions given or store their maximum antenna gain for one or more directions given (such as for the purpose of testing the radio access network (RAN) 4 or 5, power class definitions, Pcmax definitions and so on, across the crosshairs or 0, 30, 45 or 60 degrees incline at from the crosshairs and so on). In the case of staff or peak antenna gain be difficult to achieve in practice, the maximum antenna gain of 95 percentile ² (or 90th percentile ²⁾ can be
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47/70 used as peak sighting gain, as shown below.
[0128] Peak EIRP may not be easily obtained in practice, as the antenna pattern may be more complicated (for example, it is not smooth in spatial directions) but it usually peaks around the crosshairs and reduces when moving away from aim. Therefore, in practice, a UE can generate a plurality of maximum EIRPs over a plurality of directions, associated with the maximum EIRP for a plurality of angles. The UE ranks the maximum EIRPs to obtain a cumulative distribution function (CDF) and selects a small number of percentage points to represent the total EIRP CDF. This can be a way of defining the power class of the UEs, which can be useful for network planning because the higher power UEs can allow larger cells while the lower power UEs require smaller cells.
[0129] In 3GPP LTE, the power class and Pcmax for UEs are defined as driven, that is, based on TORP. As an illustrative example, the EU power class specifications from TS 36.101 are as follows:
EUTRA Class 3 band (dBm) Tolerance (dB)
1 23 + 1-2 2 23 + 1-2 3 23 + 1-2 4 23 +/- 2
Other examples are similar. Clearly, the EU power class in 3GPP LTE is generally defined as the maximum output power, ie, maximum TORP, summarizing all antenna connectors in possibly all bands. Likewise, maximum power reduction (MPR) and additional MPR (A-MPR) are also based on TORP. In addition, Pcmax is defined based on TORP and other quantities. In other words, Pcmax is also based on TORP. Additionally in 3GPP LTE, the uplink power control and PHR use Pcmax. Therefore, uplink power control and PHR are also based on TORP.
[0130] However, 3GPP LTE and its definitions for Pcmax, Ppusch, PH, Po and so on, are for communications to operate at the most frequencies
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48/70 lows, such as less than 6 GHz or even below 28 GHz. In higher frequency (HF) communication systems, due to possibly higher antenna gain in general, TORP alone may be insufficient in some cases and EIRP becomes more useful in some cases. Consequently, 3GPP RAN4 adopts definitions based on EIRP for the power class and Pcmax.
[0131] It should be noted that if the HF uplink power control equations are similar to those of 3GPP LTE then it is implied that the antenna gains are absorbed in PL, which can be more accurately referred to as loss of coupling (CL ). In such a situation, the uplink power control must use TORP-based definitions, which are generally accessible by the UE and knowledge of the antenna gain is not necessary for uplink power control. Even in 3GPP LTE, the base station antenna gain and the UE antenna gain exist and are absorbed in the PL.
[0132] On the other hand, if the HF uplink power control equations are based on EIRP then the gains of the UE antenna should be excluded from PL. Otherwise, the gains of the antenna would be counted twice. A disadvantage of this is that the UE needs to be aware of the antenna gain for the uplink power control. Some UEs may be able to estimate the antenna gains within a certain tolerance, but other UEs may not be able to do so.
[0133] Consequently, TORP based uplink power control helps to avoid the need to estimate antenna gains and can be simpler than EIRP based uplink power control. Similar conclusions can be drawn for the uplink PHR. Therefore, uplink power control based on TORP and PHR avoids the need to estimate antenna gain and may be simpler than uplink power control based on EIRP and PHR.
[0134] In NR for HF, a UE can maintain one or multiple beam pair connections (BPLs). Each GLP is associated with an RSRP and, consequently, a loss of coupling value. Unless the gain
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49/70 of the antenna is estimated by the UE, the PL (excluding the gain of the UE antenna) will not be available for the UE. Consequently, assuming that the loss of coupling (as opposed to PL) is used for power control, multiple BPLs cannot share power control or PHR, that is, separate power control and PHR are required per beam and the UE antenna gain is transparent to power control and PHR-related operations. On the other hand, if PL is obtained by the UE excluding antenna gain then in principle, multiple GLPs associated with the same access node may be able to share the same power control process and PHR process, but different power controls or PHR values are still required for BPLs and antenna gains used in power control or PHR. Therefore, separate power control and PHR for each GLP must be adopted. To summarize, the uplink power control and PHR are separate for each GLP maintained by a UE.
[0135] It should be noted that uplink power control based on EIRP or PHR may have some advantages. As an example, it may be more relevant from the receiver's point of view. Where, if the receiver needs to receive a signal with a certain SINR, the entire receiver will be concerned with the EIRP of the transmitter and how the EIRP is obtained is irrelevant. For example, whether that EIRP is obtained from TORP high lowest antenna gain or from TORP low highest antenna gain is irrelevant to the receiver. The transmitter may have more flexibility in adjusting its TORP and beam. However, if the power control and PHR are separate for each GLP and each GLP has a fixed antenna gain then such flexibility may not exist anyway. This further suggests that uplink power control based on TORP and PHR should be used.
[0136] According to an example modality, a limit value (for example, a possible upper limit) for uplink power control and PHR is provided. The limit value can be used to limit the uplink power, both in TORP and EIRP. The limit value can also be used to determine the PHR. As an example in 3GPP LTE, Pcmax is the limit value. In other words in 3GPP LTE, the power class and Pcmax are used as a limit value in the power control of
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50/70 uplink or PHR.
[0137] A similar limit value is usable in HF. As an example, the limit value is based on TORP. A limit value based on TORP can be entered, based on Equations (1) or (2). It should be noted that because TORP is not directional, only a limit value of TORP is required and can be applied in any direction. It should also be noted that the TORP threshold value must be set so that it is an achievable value for the UE. Otherwise, the PHR determined by the UE would not be significant and the UE would not be able to accurately implement the power control equation. The uplink power control can still adopt an equation of the form
P = rnin (Pcmax, P '), where P' is determined based on resource allocation, open or closed loop parameters and so on. When P '> Pcmax _and then the UE must transmit at Pcmax power. If the UE is unable to reach Pcmax then the UE will not be able to follow exactly the power control equation defined in the technical standard, which can lead to problems. A similar problem is present in PHR. As an example, if the UE reports 10 dB PHR and the access node requests the UE to increase 9 dB on the next transmission, the UE may not be able to accommodate itself. Therefore, it is necessary to know how to limit the real transmission power of the UE in terms of TORP.
[0138] According to an example embodiment, a specific maximum UE TORP limit value attainable by a UE is provided for the uplink power and PHR control. The UE-specific maximum TORP limit value helps to ensure that the power class definitions based on EIRP and Pcmax can be compatible with power control and PHR for all possible types of transmissions, provided the TORP limit value is provided specific UE maximum is actually possible by the UE or alternatively, that the antenna gain associated with the maximum EIRP in a particular direction is achievable by the UE. If Pcmax, as defined in 3GPP RAN4, is attainable by the UE then Pcmax will also be the limit value of the UE's specific maximum TORP. However, Pcmax can be defined to be a generic value for a type of UE and cannot always be reached by a particular UE. In such a situation, the limit value of the maximum specific TORP of the UE
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51/70 is another value that is less than Pcmax.
[0139] In one embodiment, assume that the power class for a UE for any transmission bandwidth with the channel bandwidth for MIMO operation without AC and without uplink is defined as a 90 ² percentile point of EIRP ( denoted Pp ₀ werciass_9o% eiRP or simply Pp) and the associated antenna gain is estimated by the UE at Ggo% then the Pcmax, c of EIRP for a service cell is defined within the expressive limits as:
Pcmax_l, c - Pcmax, PcMAx_H, _c with
PcMAX_L, c = MIN {PeMAX, c- ATc, c,
Pp - MAX (MPR _C + A-MPR _C + ATib, c + ATc.c + ATProSe, P-MPR _C )}, Pcmax_h, c = MIN {Pemax, c, Pp} · where Pemax, _c is a maximum value power specified to meet cell c, Pp is the maximum EU power without considering the tolerance specified in 3GPP TS 36.101 Table 6.2.2-1 under consideration, MPR _c and AMPR _c are values specified in sub-clauses 3GPP TS 36.101 6.2.3 and 6.2.4, ATib, c is an additional tolerance to meet cell c as specified in 3GPP TS 36.101 Table 6.2.5-1 (ATib, c = 0 dB, otherwise), ATc, _c is another tolerance and is equal at 1.5 dB when NOTE 2 in 3GPP TS 36.101 Table 6.2.21 applies and is equal to 0 dB when NOTE 2 in 3GPP TS 36.101 does not apply, ATproSe = 0.1 dB when the UE supports ProSe Direct Discovery or ProSe Direct Communications in the corresponding E-UTRA ProSe band, ATp _ro if = 0 dB otherwise and P-MPR _C is a maximum allowable reduction in output power. In addition, APpowerciass = 3 dB for an operational EU power class 2 capable in Band 41, when P-max information of 23 dBm or less is provided or if the uplink or downlink configuration is 0 or 6 in the cell; otherwise, APpowerciass = 0 dB. As shown above, Pcmax, based on EIRP, is limited by the values of Pp, MPR and other tolerances or adjustments. It should be noted that the definition of the power class may include other CDF points of EIRP, but only the highest EIRP value is used for the definition of Pcmax. The UE can then derive PcmaxTORP, c as
PcmaXTORP, C = PCmax, c - G90%.
[0140] As an illustrative example, the control equation for
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52/70 power for PUSCH is expressable as _ .... ^ CMAX, TORP, c0)>
pTTSCHeV) ^{= mln} 1. Γ log ₁₀ (M _PUSCHjC (/)) + P _o PUSCHç 0 ·) + ^ ο ·) · Ρ4 + Δ ^ ο ·) + Λ (/)]
[0141] As another illustrative example, the maximum power equation is expressable as ^ _ty pel, _c (O ^ CMAX-TORP, c (D {10 log io (^^ PLISCH, c (*)) ^ OPUSCH, c ( f) Ί (j) 'Ã'l .: (O fc (D}
[0142] In accordance with one example, the maximum EIRP restrictions, as defined in regulatory requirements, are also incorporated. The maximum restrictions of EIRP can be incorporated in Pcmax or in the power control equations. If the maximum EIRP restrictions are incorporated into Pcmax then Pcmax of EIRP can be updated as
Pcmax_l, c - Pcmax, PcMAx_H, _c with
PcMAX_L, c = MIN {PeMAX, c- ATc, c,
Pp - MAX (MPR _C + A-MPR _C + ΔΤιβ, ο + ÁTc.c + ÁTProSe, P-MPR _C )}, PcMAX_H, c = MIN {PeMAX, c PPowerClass, PeIRP, upper}.
The rest of the power control or PHR project follows in a similar way. It should be noted that PcmaxTRP, c may be of a conservative nature (i.e., less than necessary), due to the fact that a very severe limit is placed on the UE TORP in directions that are very far from the crosshairs. Incorporating the power control equation, the transmission power can be expressed as
TpuSCH.c (0 = ηώι 1 P _EIRPwer - G,
101og ₁₀ (M
PUSCH, c (0) + ^ O_PUSCH, c (j) + a _c (j) PL _c + Δ. ,, _c (0 + f _c (0J where G can be the gain of the actual antenna along the transmission direction uplink, Gactuai, which would require the UE to estimate the gain of the actual antenna in the direction. Alternatively, G may be an antenna gain known to the UE, such as Ggo%, which would also lead to link transmission power conservative upward (lower than necessary) For some UEs, it may be possible to determine a range of angles (or a set of beamformers, phase shift bit combinations or so on) that would exceed Peirp, upper if TORP complete is used and the UEs
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53/70 determine the maximum allowable TORP for these angles during actual transmissions. For other angles, the maximum TORP can be used. In other words
PcmaXTORR, a, c = min (PCmax, C - G max, a)
OR
PcmaxTORP.a = min (Pcmax - G max, a).
It should be noted that with the c index, Pcmax is applicable to a specific carrier whereas, without the c index, Pcmax is applicable to the sum of all carriers.
[0143] It should be noted that in addition to an EU power class, the gain value of the G antenna or more specifically, Ggo% or Gmax.a may be a known quantity for the UE. Alternatively, G can be one of the quantities defined in the UE power class. Because the gain of the elRP and TORP antenna are related and one can be derived from the other two, PcmaxTORP can be made available to the UE and instead, the gain value of the antenna is not then necessary for the control of power or PHR. However, the power class (including tolerance) can be set so that the regulating ElRP is not exceeded even with the highest antenna gain and maximum TORP. In such a situation, the Peirp, upper parameter must appear in Pcmax or in the uplink power control or PHR equations.
[0144] The expressions previously given are for ElRP power class ² with 90th percentile , and the antenna gain associated as shown. However, if an XRth percentile (or peak or average) ElRP and associated antenna gain are provided and if there is a higher defined ElRP point then these values can be used to define the Pcmax. In other words, the Pp in the expressions above is replaced by Ppowerclass, x% elRP and PcmaxTORP = Pcmax, c - Gx% and the expressions will be evaluated as described.
[0145] Additionally, if the Xésiwo percentile ElRP (or peak or medium) is provided and there is no higher defined ElRP point. In addition, if the antenna gain known to the UE is G 'and is not associated with the ElRP value then the Pp in the above expressions will be replaced by Pp _O werciass, x% eiRP and PcmaxTORP = Pcmax, c - G' and the expressions will be evaluated as described. It should be noted that if G '<Gx%, the link power control
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Upward 54/70 would be conservative whereas if G '> Gx% then aggressive uplink power control can be used (when aggressive power control causes no problems (such as violating regulatory limits) and then can be allowed , otherwise, aggressive power control is not allowed).
[0146] The modality of the examples for uplink power control based on EIRP or PHR presented in this report is described using the PUSCH. However, the modality of the examples presented in this report are operable with other uplink channels, such as SRS, RACH, PUSCH and PUCCH and so on. Therefore, the discussion of uplink power control based on EIRP or PHR using only PUSCH should not be interpreted as limiting the scope or spirit of the example modalities.
[0147] Additionally, the modality of the examples for uplink power control based on EIRP or PHR presented in this report is described in an environment with a carrier and a single beam, without an uplink AC link MIMO uplink, dual connectivity (DC ) uplink. However, the modality of the examples presented in this report are operable in deployments that support U-link CA U-link MIMO U-link DC, multiple panels in the UE, wide carriers with one or more parts of the bandwidths (BWPs), multiple beams and so on against. In such a situation, the power class can be defined to include all bands, all panels, all cell groups (or TRP groups), MIMO resources and so on. Pcmax can be defined for all bands and delimited by the power class and Pcmax, c can be defined for each carrier or BWP and also delimited by the power class. Example expressions for Pcmax, c include
Pcmax_l = MIN {1 Olog-ιοΣ MIN [EMAx, c / (Átc, c), pPowerClass / (mprc-a-mpr _c -Atc, c 'AtlB.cAtProSe), pPowerCIass / pmprc], PPowerCIass]
Pcmax_l, c - Pcmax, PcMAx_H, _c with
PcMAX_L, c = MIN {PeMAX, c- ATc, c,
Pp - MAX (MPR _C + A-MPR _C + ΔΤιβ, ο + ATc.c + ATProSe, P-MPR _C )}.
[0148] The above expressions for Pcmax, c are based on
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55/70
EIRP. In order to determine Pcmax expressions based on TORP, a conversion is applied. Sample conversions include
PcmaxTORP = Pcmax - G90%
PcmaxTORP.c = Pcmax, c - G90%.
[0149] According to one example mode, in power control or PHR, Pcmax, torp, c is used for each CC or BWP. In addition, a general PcmaxTORP is used to determine whether the UE must scale down its power. The remaining aspects of power control or PHR follow as specified in 3GPP LTE. Clearly, in addition to the EIRP regulatory requirements, the maximum output power of a UE, that is, the maximum TORP, is the limit (in other words, the limit value) of all carrier resources. Therefore, the power scale, 0 power control and PHR, must be based on the limit value.
[0150] According to an example modality in a communication system that supports DC and the like, a group of cells per Pcmax (denoted Pcmax, c, i) is defined and is delimited by the power class. In such a situation, Pcmax based on TORP, Pcmax, torp, c, í, can be defined by removing Ggo% and the expressions will be evaluated as described. In addition to the EIRP regulatory requirements, the maximum output power of a UE, that is, the maximum TORP, is the limit (in other words, the limit value) of all carrier resources of all cell groups, as well as scaling power, power control and PHR, must be based on the limit value. This is also applicable to situations with multiple beam transmissions to multiple TRPs using one or more antenna panels.
[0151] According to an example embodiment, when 0 UE supports both HF and LF, the HF power class is defined based on EIRP and the LF power class is defined based on TORP. However, each can operate independently if the regulatory requirements are independent for HF and LF. As an example, a regulatory requirement for LF requires that LF does not exceed 23 dBm TORP while a regulatory requirement for HF requires that HF does not exceed 45 dBm EIRP. In such a situation, the UE determines the power control or PHR separately or independently for HF and LF. If there is a total EIRP restriction however, the UE also needs to estimate its LF antenna gain, consequently, obtaining LF EIRP. The gain
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56/70 LF antenna maximum can be used to simplify implementation due to the fact that the gain variations of the LF antenna are generally smaller. If the total EIRP restriction is violated, the LF and HF TORP can be reduced by the same amount of dB to meet the restriction. In other words, the power control or PHR for HF or LF can still be based on a single TORP value.
[0152] Figure 10A illustrates an operation flow diagram of example 1000 that occurs on an access node that communicates with a UE with a specified power control setting using groups of power control parameters. Operations 1000 can be indicative of operations occurring on an access node as the access node communicates with a UE with a specified power control setting using groups of power control parameters.
[0153] Operations 1000 begin with the access node specifying a power control setting, selecting power control parameter values for the power control parameter groups (block 1005). The access node can select values for power control parameters for each group of power control parameters or for a subset of the groups of power control parameters. The access node can select values for one or more power control parameters from a group of particular power control parameters. The access node sends the power control parameter values of the power control setting to the UE on a per-group basis (block 1007). As an example, the power control parameters of a single group can be organized into a list and referenced using an index and the access node sends an index to a power control parameter and a value of the control parameter power. In a situation where there is more than one value or more than one power control parameter, the access node can repeat the parameter value and the power control parameter index for each one. The access node receives an uplink transmission from the UE (block 1009). The uplink transmission is sent by the UE, according to the power control setting sent by the access node.
[0154] Figure 10B illustrates a 1030 diagram of a first technique
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57/70 of the example used by an access node to send the power control parameter values. Diagram 1030 illustrates an example implementation of block 1007 of Figure 10A. The access node sends the power control parameter values using RRC signaling.
[0155] Figure 10C illustrates a 1040 diagram of a second example technique used by an access node to send the power control parameter values. Diagram 1040 illustrates an example implementation of block 1007 of Figure 10A. The access node sends the power control parameter values using DCI signaling.
[0156] Figure 10D illustrates a 1050 diagram of a third example technique used by an access node to send power control parameter values. Diagram 1050 illustrates an example implementation of block 1007 of Figure 10A. The access node sends a subset of the power control parameter values using RRC signaling (block 1055) and a remainder of the power control parameter values using DCI signaling (block 1057). As an example, the power control setting can be specified using MAC, PHY or DCI signaling (implying that there are no pre-defined power control settings) and the DCI provides dynamic information on which power control setting to use . In one embodiment, the DCI provides information on the power control parameters of group C 715 or group D 720 dynamically while the power control parameters of group A 705 and group B 710 are signaled using MAC, PHY or DCI signaling.
[0157] Figure 11 illustrates a flow diagram of example 1100 operations that occur on an access node that sets up groups of power control parameters. The 1100 operations can be indicative of operations that occur on an access node since the access node configures groups of power control parameters for UEs.
[0158] Operations 1100 begin with the access node sending configuration information about uplink resources (block 1105). The configuration information sent by the access node specifies uplink resources that have been allocated to the UE for uplink transmissions, for example. The access node groups the power control parameters in a plurality of groups (block 1107). As a
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58/70 illustrative example, power control parameters are grouped into four groups: group A, group B, group C and group D. Group A including power control parameters related to uplink signals or resources, group B including power control parameters related to RS or SS for PL measurement, group C including power control parameters related to the configuration or set of open loop parameters and group D including power control parameters related to the configuration or set of parameters closed loop. The access node sends configuration information about the plurality of groups (block 1109). Configuration information about the plurality of groups can be sent using RRC signaling, for example.
[0159] Figure 12 illustrates a flow diagram of example 1200 operations occurring on an UE that communicates with an access node with a specified power control setting using groups of power control parameters. The 1200 operations can be indicative of operations that take place on a UE as the UE communicates with an access node with a specified power control setting using groups of power control parameters.
[0160] Operations 1200 begin with the UE receiving configuration information about uplink resources (block 1205). The configuration information sent by the access node specifies uplink resources that have been allocated to the UE for uplink transmissions, for example. The UE receives configuration information about a plurality of groups of power control parameters (block 1207). The plurality of groups of power control parameters collectively specify power control settings and can be grouped by the access node or a technical standard. The configuration information can be received at the RRC signaling. The UE receives values from the power control parameter (block 1209). The power control parameter values can be received based on a group of parameters, which means that the UE can receive an index in a group and a value for the power control parameter associated with the index. The UE can receive index and values for power control parameters from each group before receiving indexes and values for power control parameters a
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59/70 from another group. It should be noted that power control parameters from some groups may not be received, allowing the UE to use default values for these power control parameters. The UE selects a transmit power level (block 1211). The transmit power level is selected, according to the power control setting (as specified by the power control parameter values received from the access node ) and a count related to the number of times the UE tried to transmit. As an example, the UE performs one or more PL estimates based on downlink signals (such as a downlink RS (for example, CSI-RS), SS, DMRS and so on), as specified by the values of the power control parameter provided by the access node. The UE also maintains one or more closed loop power control states, as specified by the power control parameter values provided by the access node. The PL estimate and the closed loop power control state are used in the selection of the transmit power level. In addition, open loop power control parameters (for example, α (alpha) and Pd) are also used in the selection of the transmit power level. The UE transmits on the uplink with the power level selected in block 1211 (block 1213).
[0161] Figure 13 illustrates a flow diagram of example 1300 operations that take place on an access node that communicates with a UE using the power control specified by groups of power control parameters. The 1300 operations can be indicative of operations that occur on an access node such as the access node that communicates with a UE using the power control specified by groups of power control parameters.
[0162] Operations 1300 begin with the access node sending configurations of one or more uplink resources to the UE (block 1305). One or more uplink resources are allocated to the UE to allow the UE to make uplink transmissions, such as SRSs, PUCCH or PUSCH. The access node sends configurations of one or more groups of power control parameters (block 1307). As an example, the access node can send downlink signal configurations, open loop power control parameters or
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60/70 closed loop. The access node sends a power control configuration (block 1309). The power control setting can specify power control parameter values from one or more than one or more groups of power control parameters, for example. The access node receives an uplink transmission from the UE (block 1311). The uplink transmission from the UE can be transmitted, according to the power control configuration provided by the access node. The transmission power of the uplink transmission is also, according to a loss of path between the access node and the UE, which is determined based on downlink signals transmitted by the access node.
[0163] Figure 14 illustrates a flow diagram of example 1400 operations that occur on a UE that communicates with an access node using the power control specified by groups of power control parameters. The 1400 operations can be indicative of operations that occur in a UE such as the UE that communicates with an access node using the power control specified by groups of power control parameters.
[0164] Operations 1400 begin with the UE receiving configurations of one or more uplink resources from the access node (block 1405). One or more uplink resources are allocated to the UE to allow the UE to make uplink transmissions, such as SRSs, PUCCH or PUSCH. The UE receives configurations of one or more groups of power control parameters (block 1407). As an example, the UE can receive downlink signal configurations, open loop power control parameters or closed loop power control parameters. The UE receives a power control configuration (block 1409). The power control setting can specify power control parameter values from one or more than one or more groups of power control parameters, for example. The UE sends an uplink transmission to the access node (block 1411). The uplink transmission from the UE can be transmitted, according to the power control configuration provided by the access node. The transmission power of the uplink transmission is also
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61/70 according to a loss of path between the access node and the UE, which is determined based on downlink signals transmitted by the access node.
[0165] Figure 15 illustrates a block diagram of a 1500 mode processing system that performs methods described in this report, which can be installed on a host device. As shown, processing system 1500 includes processor 1504, memory 1506 and interfaces 1510 to 1514, which can (or cannot) be arranged as shown in Figure 15. Processor 1504 can be any component or collection of components adapted for performing computations or other processing-related tasks and memory 1506 can be any component or collection of components adapted to store schedules or instructions for execution by the 1504 processor. In one embodiment, memory 1506 includes non-transitory, computer-readable media. Interfaces 1510, 1512, 1514 can be any component or collection of components that allow the processing system 1500 to communicate with other devices or components or a user. For example, one or more of interfaces 1510, 1512, 1514 can be adapted to communicate data, control or management messages from processor 1504 to applications installed on the host device or a remote device. As another example, one or more of interfaces 1510,1512, 1514 can be adapted to allow a user or user device (eg, personal computer (PC) etc.) to interact or communicate with the 1500 processing system. Processing system 1500 may include additional components not shown in Figure 15, such as long-term storage (e.g., non-volatile memory, etc.).
[0166] In some embodiments, the 1500 processing system is included in a network device that is accessing or otherwise part of a telecommunications network. In one example, the 1500 processing system is on a network-side device in a wired or wireless telecommunications network, such as a base station, a relay station, a programmer, a controller, a gateway, a router , an application server or any other device on the telecommunications network. In other modalities, the 1500 processing system
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62/70 is on a user-side device accessing a wired or wireless telecommunications network, such as a mobile station, user equipment (UE), personal computer (PC), tablet, wearable communications device (for example, a smartwatch, etc.) or any other device adapted to access a telecommunications network.
[0167] In some embodiments, one or more of the interfaces 1510, 1512, 1514 connect the processing system 1500 to a transceiver adapted to transmit and receive signaling through the telecommunications network. Figure 16 illustrates a block diagram of a transceiver 1600 adapted to transmit and receive signaling over a telecommunications network. The 1600 transceiver can be installed on a host device. As shown, transceiver 1600 comprises a network side interface 1602, a coupler 1604, a transmitter 1606, a receiver 1608, a signal processor 1610 and a device side interface 1612. The network side interface 1602 can include any component or collection of components adapted to transmit or receive signaling through a wired or wireless telecommunications network. Coupler 1604 can include any component or collection of components adapted to facilitate bidirectional communication via the 1602 side interface. Transmitter 1606 can include any component or collection of components (eg, uplink converter, power amplifier, etc.). ) adapted to convert a baseband signal into a modulated carrier signal suitable for transmission through the network side interface 1602. The receiver 1608 can include any component or collection of components (for example, downlink converter, amplifier low noise etc.) adapted to convert a carrier signal received through the network side interface 1602 into a baseband signal. The signal processor 1610 can include any component or collection of components adapted to convert a baseband signal into a data signal suitable for communication through the device side interface 1612 or vice versa. The 1612 device-side interface can include any component or collection of components adapted to communicate data signals between the 1610 signal processor and components within the device
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63/70 host (for example, 1300 processing system, local area network (LAN) ports etc.).
[0168] Transceiver 1600 can transmit and receive signaling through any type of communication medium. In some embodiments, the 1600 transceiver transmits and receives signaling via wireless media. For example, the transceiver 1600 may be a wireless transceiver adapted to communicate, according to a wireless telecommunications protocol, such as a cellular protocol (for example, long-term evolution (LTE), 5G, 5G NR etc.) , a wireless local area network (WLAN) protocol (for example, WiFi, etc.), or any other type of wireless protocol (for example, Bluetooth, near field communication (NFC), etc.). In such embodiments, the network side interface 1602 comprises one or more antennas or radiating elements. For example, the network side interface 1602 can include a single antenna, multiple separate antennas or a set of multiple antennas configured for multi-layer communication, for example, single input multiple output (SIMO), multiple input single output ( MISO), multiple input multiple input (MIMO) etc. In other modalities, the 1600 transceiver transmits and receives signaling through a steel cable medium, for example, twisted pair cable, coaxial cable, optical fiber etc. Specific processing systems or transceivers may use all components shown or a subset of the components and levels of integration may vary from device to device.
[0169] Figure 17 illustrates an example of a 1700 communication system. In general, the 1700 system allows multiple wired or wireless users to transmit and receive data and other content. The 1700 system can implement one or more methods of channel access, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA ), Single carrier FDMA (SC-FDMA) or non-orthogonal multiple access (NOMA).
[0170] In this example, the 1700 communication system includes electronic devices (ED) 1710a to 1710c, radio access networks (RANs) 1720a to 1720b, a main network 1730, a public switched telephone network (PSTN) 1740, the Internet 1750 and other 1760 networks. While certain numbers of these components or elements are shown in Figure 17, any
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64/70 number of these components or elements can be included in the 1700 system.
[0171] DIs 1710a to 1710c are configured to operate or communicate on the 1700 system. For example, EDs 1710a to 1710c are configured to transmit or receive via wired or wireless communication channels. Each ED 1710a through 1710c represents any suitable end user device and may include such devices (or may be referred to) as an equipment or user device (UE), wireless transmitting or receiving unit (WTRU) mobile station, subscriber unit fixed or mobile, cell phone, personal digital assistant (PDA), smartphone, laptop, computer, touchpad, wireless sensor or consumer electronic device.
[0172] The RANs 1720a to 1720b in this report include base stations 1770a to 1770b, respectively. Each base station 1770a through 1770b is configured to wirelessly interface with one or more of the EDs 1710a through 1710c to allow access to the main network 1730, PSTN 1740, Internet 1750 or other 1760 networks. For example, base stations 1770a through 1770b may include (or be) one or more of several well-known devices, such as a base transceiver station (BTS), a B node (NodeB), an evolved B node (eNodeB), a B node (gNB) from the next generation (NG), a domestic B node, a domestic eNodeB, a site controller, an access point (AP) or a wireless router. EDs 1710a to 1710c are configured to make the interface communicate with the Internet 1750 and be able to access the main network 1730, PSTN 1740 or other networks 1760.
[0173] In the embodiment shown in Figure 17, base station 1770a forms part of RAN 1720a, which may include other base stations elements or devices. Also, the base station 1770b forms part of RAN 1720b, which may include other base stations elements or devices. Each base station 1770a through 1770b operates to transmit or receive wireless signals within a particular region or geographic area, sometimes referred to as a "cell." In some embodiments, MIMO (MIMO) technology can be used with multiple transceivers for each cell.
[0174] Base stations 1770a to 1770b communicate with one or more of the EDs 1710a-1710c via one or more 1790 overhead interfaces using wireless communication links. 1790 overhead interfaces can
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65/70 use any suitable radio access technology.
[0175] It is considered that the 1700 system can use multiple functionalities to access multiple channels, including such schemes as described above. In particular modalities, base stations and EDs implement a new 5G (NR), LTE, LTE-UM or LTE-B radio. Certainly other schemes for multiple access wireless protocols can be used.
[0176] RANs 1720a to 1720b are in communication with the main network 1730 to provide EDs 1710a to 1710c with voice, data, application, Internet Protocol via Voice (VoIP) or other services. Understandably, RANs 1720a through 1720b or main network 1730 can be in direct or indirect communication with one or more other RANs (not shown). The main 1730 network can also serve as gateway access to other networks (such as PSTN 1740, Internet 1750 and other 1760 networks). In addition, some or all EDs 1710a through 1710c may include functionality for communicating with different wireless networks over different wireless connections using different wireless protocols or technologies. Instead of wireless communication (or in addition), EDs can communicate through wired communication channels to a service or switching provider (not shown) and to the 1750 Internet.
[0177] Although Figure 17 illustrates an example of a communication system, several changes can be made in Figure 17. For example, the 1700 communication system can include any number of EDs, base stations, networks or other components in any configuration. proper.
[0178] Figures 18A and 18B illustrate devices of the example that can implement the methods and teachings, according to this disclosure. In particular, Figure 18A illustrates an example ED 1810 and Figure 18B illustrates an example of base station 1870. These components can be used in the 1700 system or any other suitable System.
[0179] As shown in Figure 18A, ED 1810 includes at least one processing unit 1800. Processing unit 1800 implements several processing operations of ED 1810. For example, processing unit 1800 can perform signal encoding, data processing, power control, input or output processing or any other functionality that allows the ED 1810 to
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66/70 1700 system. Processing unit 1800 also supports the methods and teachings described in more detail above. Each processing unit 1800 includes any suitable processing or computing device configured to perform one or more operations. Each 1800 processing unit can, for example, include a microprocessor, microcontroller, digital signal processor, set of field programmable ports or application-specific integrated circuit.
[0180] The ED 1810 also includes at least one transceiver 1802. Transceiver 1802 is configured to modulate data or other content for transmission to at least one antenna or NIC (Network Interface Controller) 1804. Transceiver 1802 is also configured to demodulate data or other content received for at least one 1804 antenna. Each 1802 transceiver includes any structure suitable for generating signals for wireless or wired transmission or processor signals received wireless or wired. Each 1804 antenna includes any structure suitable for transmitting or receiving wireless or wired signals. One or multiple 1802 transceivers can be used on ED 1810 and one or multiple 1804 antennas can be used on ED 1810. Although shown as a single functional unit, a 1802 transceiver can also be implemented using at least one transmitter and at least one separate receiver .
[0181] ED 1810 additionally includes one or more 1806 input or output devices or interfaces (such as a wired interface for the 1750 Internet). 1806 input or output devices facilitate interaction with a user or other devices (network communications) on the network. Each 1806 input or output device includes any structure suitable for providing information or receiving information from a user, such as a speaker, microphone, voice keyboard, keyboard, monitor or touch screen, including communication interface network.
[0182] In addition, ED 1810 includes at least 1808 memory. 1808 memory stores instructions and data used, generated or collected by ED 1810. For example, 1808 memory can store software or firmware instructions executed by the processing unit 1800 and data used to reduce or eliminate interference in received signals. Each 1808 memory includes any suitable volatile or non-volatile device
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67/70 storage and recovery. Any suitable type of memory can be used, such as random access memory (RAM), read-only memory (ROM), hard disk, optical disk, subscriber identity module (SIM) card, memory card, memory card digital security memory (SD) and the like.
[0183] As shown in Figure 18B, base station 1870 includes at least one processing unit 1850, at least one transceiver 1852, which includes functionality for a transmitter and receiver, one or more antennas 1856, at least one memory 1858 and one or more input or output devices or 1866 interfaces. A programmer, who would be skilled in the art, is coupled to the 1850 processing unit. The programmer can be included inside or operated separately from the base station 1870. The processing unit 1850 implements various processing operations for the 1870 base station, such as signal encoding, data processing, power control, input or output processing or any other functionality. The 1850 processing unit can also support the methods and teachings described in more detail above. Each 1850 processing unit includes any suitable computing or processing device configured to perform one or more operations. Each 1850 processing unit can, for example, include a microprocessor, microcontroller, digital signal processor, set of field programmable ports or application-specific integrated circuit.
[0184] Each 1852 transceiver includes any structure suitable for generating signals for wireless or wired transmission to one or more EDs or other devices. Each 1852 transceiver additionally includes any structure suitable for processing signals received wirelessly or wired from one or more EDs or other devices. Although shown combined as an 1852 transceiver, a transmitter and a receiver can be separate components. Each 1856 antenna includes any structure suitable for transmitting or receiving wireless or wired signals. While a common 1856 antenna is shown in this report as attached to the 1852 transceiver, one or more 1856 antennas can be attached to the 1852 transceiver (s), allowing separate 1856 antennas to be attached to the transmitter and receiver, if
Petition 870190133507, of 12/13/2019, p. 73/83
68/70 equipped as separate components. Each 1858 memory includes any suitable volatile or non-volatile storage and retrieval device. Each 1866 input or output device facilitates interaction with a user or other devices (network communications) on the network. Each 1866 input or output device includes any structure suitable for providing or receiving information or receiving information from a user, including network interface communications.
[0185] Figure 19 is a block diagram of a 1900 computing system that can be used to implement the devices and methods disclosed in this report. For example, the computing system can be any EU entity, access network (AN), mobility management (MM), session management (SM), user plan gateway (UPGW) or access layer (AS) . Specific devices can use all the components shown or only a subset of the components and the integration levels can vary from device to device. In addition, a device can contain multiple instances of a component, such as multiple processing units, processors, memories, transmitters, receivers, etc. The computing system 1900 includes a processing unit 1902. The processing unit includes a central processing unit (CPU) 1914, memory 1908 and may additionally include a mass storage device 1904, a video adapter 1910 and an interface I / O 1912 connected to a 1920 bus.
[0186] The 1920 bus can be one or more of any type of various bus architectures including a memory bus or memory controller, a peripheral bus or a video bus. The 1914 CPU can comprise any type of electronic data processor. The 1908 memory can comprise any type of non-transitory system memory such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), read-only memory (ROM) or a combination of same. In one embodiment, memory 1908 may include ROM for use at startup and DRAM for storing programs and data during program execution.
Petition 870190133507, of 12/13/2019, p. 74/83
69/70
[0187] Mass storage 1904 can comprise any type of non-transitory storage device configured to store data, programs and other information and make data, programs and other information accessible via the 1920 bus. Mass storage 1904 can comprise, for example, For example, one or more solid state drives, a hard disk drive, a magnetic disk drive, or an optical disk drive.
[0188] The 1910 video adapter and the 1912 I / O interface provide interfaces for coupling external input or output devices to the 1902 processing unit. As illustrated, examples of input or output devices include a 1918 monitor attached to the adapter video adapter and a 1916 mouse, keyboard or printer attached to the 1912 I / O interface. Other devices can be attached to the 1902 processing unit and additional or less interface cards can be used. For example, a serial interface such as Universal Serial Bus (USB) (not shown) can be used to provide an interface for an external device.
[0189] Processing unit 1902 also includes one or more 1906 network interfaces, which may comprise wired connections, such as an Internet cable or wireless connections to access nodes or different networks. The 1906 network interfaces allow the processing unit 1902 to communicate with remote units over networks. For example, the 1906 network interfaces can provide wireless communication through one or more transmitters or transmit antennas and one or more receivers or receive antennas. In one embodiment, the processing unit 1902 is coupled to a local area network 1922 or to a wide area network for data processing and communications with remote devices, such as other processing units, the Internet or remote storage facilitators.
[0190] It should be assessed that one or more steps of the modalities method provided in this report can be performed by corresponding units or modules. For example, a signal can be transmitted by a transmission unit or a transmission module. A signal can be received by a receiving unit or a receiving module. A signal can be processed by a processing unit or a module
Petition 870190133507, of 12/13/2019, p. 75/83
70/70 processing. Other steps can be performed by a unit or determination module. The respective units or modules can be hardware, software or a combination thereof. For example, one or more of the units or modules can be an integrated circuit, such as an array of field programmable ports (FPGAs) or application-specific integrated circuits (ASICs).
[0191] Although the present disclosure and its advantages have been described in detail, it should be understood that various changes, substitutions and changes can be made to this report without departing from the spirit and scope of the disclosure as defined by the attached claims.

权利要求:
Claims (28)
[1]
1. Computer-implemented method to operate user equipment (UE), FEATURED by the fact that the method comprises:
receive, by the UE, at least one of a first group configuration of one or more downlink (DL) signals, a second group configuration of one or more open loop power control (PC) parameters, or a third group configuration of one or more closed loop PC parameters (1407);
receiving, by the UE, a PC configuration, in which the PC configuration is associated with at least one of a subset of the first group, a subset of the second group, or a subset of the third group (1409);
determine, by the UE, a transmission power level according to the PC configuration and a path loss, in which the path loss is calculated according to the DL signals in the subset of the first group; and transmitting, through the UE, a signal in a set of uplink resources (UL) at the transmission power level (1411).
[2]
2. Method, according to claim 1, CHARACTERIZED by the fact that each DL signal in the first group of one or more DL signals is associated with a first index.
[3]
3. Method according to claim 1 or 2, CHARACTERIZED by the fact that the DL signals are DL reference signals (RSs), or synchronization signals (SS) and a demodulation reference signal (DMRS) of physical diffusion channel (PBCH) associated with the SS.
[4]
4. Method, according to claim 3, CHARACTERIZED by the fact that the DL RSs are channel state information RSs (CSIRSs).
[5]
5. Method according to any one of claims 1 to 4, CHARACTERIZED by the fact that the third group of one or more closed loop PC parameters comprises a group of one or more transmission PC control (TPC) configurations .
[6]
6. Method according to any one of claims 1 to 5,
Petition 870190133507, of 12/13/2019, p. 77/83
2/6
CHARACTERIZED by the fact that the third group of one or more closed loop PC parameters comprises a group of one or more PC adjustment state settings.
[7]
7. Method according to claim 6, CHARACTERIZED by the fact that each PC tuning state setting in the group of one or more PC tuning state settings is associated with a third index.
[8]
8. Method according to any one of claims 1 to 7, CHARACTERIZED in that each open loop PC parameter of the second group of one or more open loop PC parameters comprises a pair of PO and alpha parameters (a ), with each pair of PO and alpha parameters (a) being associated with a second index.
[9]
9. Method implemented by computer to operate an access node, CHARACTERIZED by the fact that the method comprises:
send, through the access node, at least one of a first group configuration of one or more downlink (DL) signals, a second group configuration of one or more open loop (PC) power control parameters , or a configuration of a third group of one or more closed loop parameters PC (1307);
sending, through the access node, a PC configuration, in which the PC configuration is associated with at least one of a subset of the first group, a subset of the second group, or a subset of the third group (1309); and receive, through the access node from a user equipment (UE), a signal in a set of uplink resources (UL) at a transmission power level selected according to the PC configuration and a loss of path, where the path loss is calculated according to the DL signals in the subset of the first group (1311).
[10]
10. Method according to claim 9, CHARACTERIZED by the fact that it additionally comprises sending, through the access node, a configuration of one or more sets of UL resources and in which one or more sets of UL resources comprise at least one of the audible reference signal (SRS) resources, physical uplink control channel (PUCCH) resources, or resources used for a shared channel
Petition 870190133507, of 12/13/2019, p. 78/83
3/6 physical uplink (PUSCH).
[11]
11. Method according to claim 9 or 10, CHARACTERIZED by the fact that it additionally comprises sending, through the access node, a DL transmission power level to a port of the DL signals in the subset of the first group.
[12]
12. Method according to any one of claims 9 to 11, CHARACTERIZED by the fact that the third group of one or more closed loop PC parameters comprises a group of one or more PC adjustment state configurations.
[13]
13. Method according to claims 9 to 12, CHARACTERIZED by the fact that each PC adjustment state configuration in the group of one or more PC adjustment state configurations is associated with a third index.
[14]
14. User equipment (EU), CHARACTERIZED by the fact that it comprises:
a memory store comprising instructions; and one or more processors in communication with the memory store, where the one or more processors execute the instructions to:
receive at least one of a first group configuration of one or more downlink (DL) signals, a second group configuration of one or more open loop power (PC) control parameters, or a configuration of one third group of one or more closed loop parameters PC, receive a PC configuration, where the PC configuration is associated with at least one of a subset of the first group, a subset of the second group or a subset of the third group, determine a transmission power level according to the PC configuration and a path loss, in which the path loss is calculated according to the DL signals in the subset of the first group, and transmit a signal across a set of uplink (UL) at the transmission power level.
[15]
15. User equipment according to claim 14, CHARACTERIZED by the fact that each DL signal in the first group of one or more DL signals is associated with a first index.
Petition 870190133507, of 12/13/2019, p. 79/83
4/6
[16]
16. User equipment according to claim 14 or 15, CHARACTERIZED by the fact that the DL signals are DL reference signals (RSs) or synchronization signals (SS) and a demodulation reference signal (DMRS) physical diffusion channel (PBCH) associated with SS.
[17]
17. User equipment according to claim 16, CHARACTERIZED by the fact that DL RSs are channel state information RSs (CSI-RSs).
[18]
18. User equipment according to any one of claims 14 to 17, CHARACTERIZED by the fact that the third group of one or more closed loop PC parameters comprises a group of one or more PC adjustment state configurations.
[19]
19. User equipment according to claim 18, CHARACTERIZED by the fact that each PC tuning state setting in the group of one or more PC tuning state settings is associated with a third index.
[20]
20. User equipment according to any of claims 14 to 19, CHARACTERIZED by the fact that each open loop PC parameter of the second group of one or more open loop PC parameters comprises a pair of P0 and alpha parameters (a), with each parameter pair P0 and alpha (a) being associated with a second index.
[21]
21. Access node, CHARACTERIZED by the fact that it comprises: a memory store comprising instructions; and one or more processors in communication with the memory store, where the one or more processors execute the instructions to:
send at least one of a first group configuration of one or more downlink (DL) signals, a second group configuration of one or more open loop power control (PC) parameters, or a configuration of one third group of one or more closed loop PC parameters, send a PC configuration, where the PC configuration is associated with at least one of a subset of the first group, a subset of the second group, or a subset of the third group , and receive, from a user equipment (UE), a signal in a set of uplink resources (UL) at a power level of
Petition 870190133507, of 12/13/2019, p. 80/83
5/6 transmission selected according to the PC configuration and a path loss, in which the path loss is calculated according to the DL signals in the subset of the first group.
[22]
22. Access node according to claim 21, CHARACTERIZED by the fact that the third group of one or more closed loop PC parameters comprises a group of one or more PC tuning state configurations.
[23]
23. Access node according to claim 22, CHARACTERIZED by the fact that each PC tuning state setting in the group of one or more PC tuning state settings is associated with a third index.
[24]
24. Computer-readable media, CHARACTERIZED by the fact that it comprises instructions, that when executed by one or more processors, the following method is performed:
receive at least one of a first group configuration of one or more downlink (DL) signals, a second group configuration of one or more open loop power control (PC) parameters, or a configuration of a third group of one or more closed loop PC parameters;
receiving a PC configuration, wherein the PC configuration is associated with at least one of a subset of the first group, a subset of the second group, or a subset of the third group;
determine, a transmission power level according to the PC configuration and a path loss, in which the path loss is calculated according to the DL signals in the subset of the first group; and transmit, a signal in a set of uplink (UL) resources at the transmit power level.
[25]
25. Computer-readable media according to claim 24, CHARACTERIZED by the fact that the third group of one or more closed loop PC parameters comprises a group of one or more PC adjustment state configurations.
[26]
26. Communication device, CHARACTERIZED by the fact that the device is configured to perform:
receive at least one of a configuration from a first
Petition 870190133507, of 12/13/2019, p. 81/83
6/6 group of one or more downlink (DL) signals, a second group configuration of one or more open loop power control (PC) parameters, or a third group configuration of one or more parameters closed-loop PC;
receiving a PC configuration, wherein the PC configuration is associated with at least one of a subset of the first group, a subset of the second group, or a subset of the third group;
determine, a transmission power level according to the PC configuration and a path loss, in which the path loss is calculated according to the DL signals in the subset of the first group; and transmit, a signal in a set of uplink (UL) resources at the transmit power level.
[27]
27. Communication apparatus according to claim 26, CHARACTERIZED by the fact that the third group of one or more closed loop PC parameters comprises a group of one or more PC adjustment state configurations.
[28]
28. Communication system comprising a user equipment and a base station, CHARACTERIZED by the fact that the user equipment is configured to carry out the method as defined in any of claims 1 to 8, and the base station is configured to carrying out the method as defined in any of claims 9 to 11.

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法律状态:
2021-10-19| B350| Update of information on the portal [chapter 15.35 patent gazette]|

优先权:

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申请号 | 申请日 | 专利标题

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US201762506435P| true| 2017-05-15|2017-05-15|

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US62/506,435|2017-05-15|

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US201762558190P| true| 2017-09-13|2017-09-13|

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US62/558,190|2017-09-13|

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US15/977,872|2018-05-11|

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US15/977,872|US10425900B2|2017-05-15|2018-05-11|System and method for wireless power control|

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PCT/CN2018/086903|WO2018210241A1|2017-05-15|2018-05-15|System and method for wireless power control|

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