uplink polling of multiple resources and transmission in antenna subsets

专利摘要:
According to some aspects of the techniques disclosed in the present invention, a UE adapted to transmit on different antenna subsets transmits an indication that the UE can transmit a number of distinct RS resources, where each of the RS resources comprises at least one RS port. The UE transmits capacity information indicating that the UE is capable of simultaneous transmission on various RS resources and / or receives first and second RS configurations, where the first RS configuration is a first list of SRS resources that at least correspond the indications of RS resources used for PUSCH transmission, and the second RS configuration is a second list of RS resources that can be used for SRS transmission. The UE receives an indication of at least one RS resource and transmits a physical channel on UE antennas associated with the indicated RS resources.
公开号:BR112019026710A2
申请号:R112019026710-7
申请日:2018-06-15
公开日:2020-06-30
发明作者:Robert Mark Harrison；Niklas Wernersson；Sebastian Faxér；Andreas Nilsson
申请人:Telefonaktiebolaget Lm Ericsson (Publ)；
IPC主号:

专利说明:

[001] [001] The present invention relates, in general, to wireless networks and particularly to the use and signaling of configurations for uplink polling reference signals for wireless devices with multiple antennas, including transmitting and receiving in different antenna subsets on wireless devices. BACKGROUND
[002] [002] The next generation wireless mobile communication system currently under development by members of the 3rd Generation Partnership Project (3GPP), commonly referred to as 5G, or "new radio" (NR), will support a diverse set of cases of use and a diverse set of implementation scenarios. The latter includes implementation both at low frequencies (hundreds of MHz), similar to current long-term evolution (LTE) systems, as well as very high frequencies (millimeter waves in tens of GHz).
[003] [003] Depending on the case of LTE, NR will use Orthogonal Frequency Division Multiplexing (OFDM) on the downlink (that is, from a network node, gNB, eNB or other base station, for a user equipment or HUH). In the ascending link (that is, from the UE to the gNB), both OFDM and OFDM scattering by Discrete Fourier Transform (DFT) will be supported.
[004] [004] The basic NR physical resource can thus be seen as a time frequency grid similar to that of LTE, as illustrated in Figure 1, in which each resource element corresponds to an OFDM subcarrier during a symbol interval of OFDM. Although a sub carrier spacing of Af = 15 kHz is illustrated in Figure 1, different values of sub carrier spacing are supported in NR. The spacing values of supported subcarriers (also referred to as different numerologies) in NR are given by Af = (15 x 2º) kHz, where a is a non-negative integer.
[005] [005] In addition, the allocation of resources in LTE is usually described in the case of resource blocks (RBs), in which a resource block corresponds to a slot (0.5 ms) in the time domain and 12 contiguous subcarriers in the frequency domain. Resource blocks are numbered in the frequency domain, starting with O from one end of the system's bandwidth. For NR, a block of resources are also 12 subcarriers in frequency, but for further study in time domain. A RB is also referred to (interchangeably) as a physical RB (PRB) in the discussion that follows.
[006] [006] In the time domain, the uplink and downlink transmissions in the NR will be organized in subframes of equal size similar to LTE, as shown in Figure 2. In NR, the length of the subframe for a reference numbering of (15 x 2nd) kHz is exactly 1/24 ms.
[007] [007] Downlink transmissions are dynamically scaled, that is, the gNB transmits, in each subframe, downlink control (DCI) information in relation to which UE data should be transmitted and which resource blocks in the link subframe current descendant the data is transmitted. According to current understandings, this control signal will normally be transmitted in the first one or two OFDM symbols in each subframe in the NR. Control information is carried over a Physical Control Channel (PDCCH) and data is carried over a Physical Downlink Shared Channel (PDSCH). The UE first detects and decodes the PDCCH and, if a PDCCH is successfully decoded, the UE decodes the corresponding PDSCH based on the control information decoded in the PDCCH. Each UE is assigned a C-RNTI (Temporary Cell Radio Network Identifier) that is unique within the same server cell. The CRC (cyclic redundancy check) bits from a PDCCH to a UE are scrambled by the UE's C-RNTI, so that a UE recognizes its PDCCH by checking the C-RNTI used to scramble the CRC (redundancy check) bits cyclic) of the PDCCH.
[008] [008] Uplink data transmission is also dynamically scaled using the PDCCH. The UE first decodes the uplink leases in the PDCCH and then transmits data about the Physical Uplink Shared Channel (PUSCH), based on the control information decoded in the uplink leasing, which can specify the order of modulation, encoding rate, allocation of uplink resources, etc.
[009] [009] In LTE, semi-persistent scheduling (SPS) is also supported on both the uplink and the downlink, with a sequence of periodic data transmissions being activated or deactivated by a single PDCCH. With SPS, there is no PDCCH transmitted for data transmissions after activation. In the SPS, the CRC of the PDCCH is shuffled by an SPS-C-RNTI, which is configured for a UE if the UE supports the SPS.
[010] [010] In addition to PUSCH, the Physical Uplink Control Channel (PUCCH) is also supported on NR, to carry uplink control (UCI) information, such as Recognition (ACK) related to HARQ (Automatic Repeat Request) Hybrid), Negative Recognition (NACK) or Channel State Information (CSI) feedback.
[011] [011] Multi-cantine techniques can significantly increase data rates and the reliability of a wireless communication system. Performance is particularly improved if the transmitter and receiver are equipped with multiple antennas, which results in a multiple input and multiple output (MIMO) communication channel. Such systems and / or related techniques are commonly referred to as MIMO.
[012] [012] While the NR standard is currently being specified, it is expected that a central component in NR will be the support for MIMO antenna deployments and MIMO-related techniques. NR is expected to support uplink MIMO, with spatial multiplexing with at least 4 layers using at least 4 antenna ports with channel-dependent pre-coding. The spatial multiplexing mode is designed for high data rates under favorable channel conditions. An illustration of the spatial multiplexing operation is provided in Figure 3 for the case where CP-OFDM (cyclic prefix OFDM) is used on the uplink.
[013] [013] As seen, the information vector symbol s is multiplied by a pre-coding matrix W Nf xr, which serves to distribute the transmission power in a subspace of the dimensional vector space Nr (corresponding to the antenna ports Nr). The pre-coding matrix is normally selected from a code book of possible pre-coding matrices and is usually indicated by means of a transmission pre-coding matrix indicator (TPMI), which specifies a unique pre-coding matrix in code books for a number of symbol streams. The symbols r in s each correspond to a layer, and r is referred to as the transmission classification. In this way, spatial multiplexing is achieved, since multiple symbols can be transmitted simultaneously on the same time / frequency resource element (TFRE). The number of symbols r is usually adapted to suit the current channel properties.
[014] [014] Since CP-OFDM is supported for uplink MIMO in NR, as opposed to only DFT spreading OFDM for PUSCH in LTE, NR MIMO codebook designs do not need to consider increases in the average power ratio for UE amplifier peak power (PAPR) as a design factor, as much as was necessary for LTE uplink MIMO Rel. 10. Therefore, both codebooks with limited PAPR increases and those with relatively high PAPR increases may be suitable for uplink MIMO in NR. Consequently, suitable uplink MIMO code books in NR may include the uplink MIMO code books defined in clause 5.3.3A of pre-existing 3GPP technical specification 36.211, as well as downlink MIMO code books in clauses 6.3.4.2.3 of 3GPP technical specification 36.211 and 7.24 of 3GPP technical specification 36.213.
[015] [015] The received No. x 1 vector yn for a given TFRE in subcarrier n (or, alternatively, number n of TFRE data) is modeled by: mn = HnWsn + ten, Equation1l where e, is a noise / interference vector obtained as achievements of a random process. The pre-encoder W can be a broadband pre-encoder, which is constant with respect to frequency or frequency selective.
[016] [016] The pre-coding matrix W is often chosen to correspond to the characteristics of the matrix H, of MIMO channel NrexNr, resulting in the so-called channel-dependent pre-coding. This is also commonly referred to as closed loop pre-coding and, essentially, strives to concentrate the transmission power in a subspace that is strong in the sense of transmitting much of the transmitted power to the UE. In addition, the pre-coding matrix can also be selected to engage the orthogonalization of the channel, which means that, after proper linear equalization in the UF, interference between layers is reduced.
[017] [017] An example of the method for a UE to select a pre-coding matrix W may be to select the Wk that maximizes the Frobenius norm of the hypothetical equivalent channel: max | [A, W; | Equation2 where A, is a channel estimate, possibly derived from sounding reference symbols (SRS).
[018] [018] In closed loop pre-coding for the NR uplink, a transmission point (TRP) transmits, based on channel measurements on the reverse link (uplink), TPMI to the UE that the UE should use in its uplink antennas. (The term "TRP" can correspond to a specific eNB, gNB, access point or other transmission point or a controller for one or more transmission points.) GNodeB (gNB) configures the UE to transmit the SRS accordingly with the number of UE antennas you would like the UE to use for uplink transmission to allow channel measurements. A single pre-encoder that must cover a large bandwidth (wide-band pre-encoder) can be signaled. It can also be beneficial to match the channel's frequency variations and instead provide feedback with a frequency selective pre-coding report, for example, multiple pre-encoders and / or multiple TPMIs, one per subband.
[019] [019] Information other than TPMI is used, in general, to determine the transmission status of the uplink MIMO, such as SRS resource indicators (SRIs), as well as transmission classification indicator (TRIs). These parameters, as well as the modulation and encoding state (MCS) and the uplink resources on which the PUSCH is to be transmitted, are also determined by channel measurements derived from SRS transmissions from the UE. The transmission rating, and thus the number of spatially multiplexed layers, is reflected in the number of pre-encoder W columns. For efficient performance, it is important to select a transmission rating that matches the channel properties.
[020] [020] In LTE, a UE can be configured with multiple channel status information reference symbol (CSI-RS) features for downlink channel status information (CSI) acquisition purposes if eMIlIMO type is used Class B. A CSI-RS resource defines a certain number of CSI-RS at a given position in the time frequency resource grid and can be associated with a given quasi-placement (QCL) assumption and relative power level for another reference signal. The CSI-RS in each CSI-RS resource is normally pre-coded with different pre-coding weights, in order to form different transmission beams. As part of the CSI reporting procedure, the UE can select a preferred CSI-RS resource, corresponding to a preferred transmission beam, with a CSI-RS resource indicator (CRI). The UE then determines a corresponding PMI, RI and CQI for the selected CSI-RS resource when performing a pre-coding search. Thus, the UE first selects the best CSI-RS resource and then applies a pre-coding codebook from among the selected CSI-RS resource.
[021] [021] LTE control signaling can be carried in a number of ways, including in PDCCH or PUCCH, incorporated in PUSCH, in Control Elements (MAC CEs) for Media Access Control (MAC) or in Resource Control signaling Radio (RRC). Each of these mechanisms is customized to carry a particular type of control information.
[022] [022] Control information carried in PDCCH, PUCCH or embedded (“piggy backed”) in PUSCH is control information related to the physical layer, such as downlink control information (DCI), uplink control information (UCI), as described in TS 36.211 of 3GPP, TS 36.212 of 3GPP and TS 36.213 of 3GPP. DCIs are used, in general, to instruct the UE to perform some physical layer function, providing the information needed to perform the function. ICUs, in general, provide the network with the necessary information, such as HAROQO-ACK, scheduling request (SR), channel status information (CSI), including CQLI, PMI, RI and / or CRI. UCI and DCI can be transmitted on a subframe by subframe basis and are therefore designed to support fast-changing parameters, including those that can vary with a rapidly weakening radio channel. Since UCI and DCI can be transmitted in each subframe, the UCI or DCI corresponding to a given cell tend to be in the order of dozens of bits, to limit the amount of control overhead.
[023] [023] Control information carried in MAC CEs is carried in MAC headers on the shared uplink and downlink transport channels (UL-SCH and DL-SCH), as described in TS 36.321 of 3GPP. Since a MAC header does not have a fixed size, control information in MAC CEs can be sent when needed and does not necessarily represent a fixed overhead. In addition, MAC CEs can transport large control payloads efficiently, as they are transported on UL-SCH or DL-SCH transport channels, which benefit from link adaptation, HARO, and can be turbo encoded. MAC CEs are used to perform repetitive tasks that use a set of fixed parameters, such as maintaining timing advance or buffer status reporting, but these tasks generally do not require transmission of a MAC CE on a subframe by subframe basis. Consequently, channel status information related to a rapidly weakening radio channel, such as PMI, CQI, RI and CRI, is not carried on MAC CEs in LTE until Release 14.
[024] [024] When building EU antenna arrays, it can be a challenge to have antennas with the same angular coverage so that they are generally seen by a given receiver TRP at the same power level. This can be particularly challenging in the millimeter wave frequencies supported by NR. In addition, it may be difficult to place all UE antennas and transmission chains (TX) in close proximity in the limited spaces available on small mobile devices. An assembly practice is to use a modular approach, in which the UE chains are divided into "panels", with one or more transmission chains per panel, as shown in Figure 4. Such multi-panel UEs are, in general, modeled as having panels with patterns of elements that point in different directions, while antenna elements within a panel have patterns of elements that generally point in the same directions, as discussed in technical report 38,802 of the 3GPP. Since the transmission chains in different panels can be separated in the UEs, it may be more difficult to maintain the calibration and phase coherence between antenna elements in different panels than to maintain the calibration and phase coherence between the antenna elements in a panel. Therefore, there can be a frequency shift, timing misalignment and / or a phase shift between the panels. Aspects of phase coherence between TX chains from different panels are discussed below.
[025] [025] The example in Figure 4 illustrates an EU set of 4 panels with 8 antenna elements in total. Each panel consists of 2 elements, with similar antenna patterns, which are driven by independent TX chains. The antenna element patterns have beam widths of approximately 90 degrees, so that all directions are covered by the 4 panels together. It is noted that, although the term "panel" relates conceptually to the notion of having physically distinct and separate groups of antennas, for example, as implemented on separate printed circuit boards, its use in the present invention should not be understood as being limited to groups of antennas that are separate and distinct in this physical sense.
[026] [026] Polling reference signals (SRS) are used for a variety of purposes in LTE and are expected to serve similar purposes in NR. A primary use for SRS is for uplink channel state estimation, allowing the channel quality estimate to enable uplink link adaptation (including determining which MCS state the UE should transmit with) and / or scheduling. selective frequency. In the context of uplink MIMO, they can also be used to determine precoders and multiple layers that will provide a good uplink transfer rate and / or SINR when the UE uses them for transmission in its uplink antenna array. Additional uses include power control and early uplink timing adjustment.
[027] [027] Unlike UEs designed according to Release 14 of the LTE standards, at least some NR UEs may be able to transmit multiple SRS resources. This is conceptually similar to the use of multiple CSI-RS resources on the downlink: an SRS resource comprises one or more SRS ports and the UE can apply a beam former and / or a precoder to the SRS ports within the SRS feature so that they are transmitted with the same effective antenna pattern. A primary motivation for defining multiple SRS resources in the UE is to support analog beam formation in the UE, in which a UE can transmit with a variety of beam patterns, but only one at a time. Such an analog beam formation can have a relatively high directivity, especially at the higher frequencies that can be supported by the NR.
[028] [028] Previous transmission diversity and uplink MIMO projects at LTE did not focus on cases in which the formation of high directivity beams could be used on different SRS ports and thus a single SRS resource was sufficient. When an NR UE transmits on different beams, the power received by the TRP can be substantially different, depending on which beam is used. One approach could be to have a single SRS feature, but to tell the UE which of its beams to use for transmission. However, since EU antenna designs vary widely between UEs and EU antenna patterns can be highly irregular, it is impracticable to have a predetermined set of EU antenna patterns with which the TRP could control beam formation. or UE uplink pre-coding. Therefore, an NR UE can transmit across multiple SRS resources using a different effective antenna pattern on each SRS resource, allowing the TRP to determine the quality and characteristics of the composite channel for the different effective antenna patterns used by the UE. Given this association of each effective antenna pattern with a corresponding SRS resource, the TRP can then indicate to the UE which of the one or more effective antenna patterns must be used for PUSCH transmission (or other physical signals or channels) via one or more SRS resource indicator, or "SRIs".
[029] [029] Depending on the implementation of the UE, it may be possible to maintain the relative phase of the transmission chains in relation to each other. In this case, the UE can form an adaptive arrangement by selecting a beam in each transmission chain and by transmitting the same modulation symbol in the selected beams of both transmission chains using different gain and / or phases between the transmission chains. This transmission of a signal or symbol of common modulation in multiple antenna elements with controlled phase can be labeled as "coherent" transmission. Support for coherent uplink MIMO transmission in LTE Release 10 is indicated by a characteristic group indication for continuity of the relative transmission phase for uplink spatial multiplexing, in which a UE indicates whether it can properly maintain the phase transmission chains over time in order to support consistent transmission.
[030] [030] In other UF implementations, the relative phases of the transmission chains may not be well controlled and coherent transmission may not be used. In such implementations, it may still be possible to transmit on one of the transmission chains at a time or to transmit different modulation symbols on the transmission chains. In the latter case, the modulation symbols in each transmission chain can form a spatially multiplexed or "MIMO" layer. This class of transmission schemes can be referred to as "non-coherent" transmission. Such non-coherent transmission schemes can be used by UEs in Release 10 of LTE with multiple transmission chains, but which do not support the continuity of the relative transmission phase.
[031] [031] An example of using an analog beam former in multiple transmission chains is diagrammed in Figure 5. In this, each transmission chain comprises a power amplifier that can be switched between a set of beams produced by a phase arrangement. The transmission chains are grouped into two sets of two transmission chains each. The transmission chains within each set have the same beam directions, whereas different sets may have beams covering different directions. For illustrative purposes, it is assumed that each transmission chain can select one of the four analog beams and the two sets of transmission chain point in opposite directions. Each set of transmission chains can therefore correspond to a "panel", as defined in TR 38,900 from 3GPP and TR 38,802 from 3GPP, and so, for illustration, the term "panel" is used.
[032] [032] In Figure 5, it is assumed that effective antenna patterns HO and H! 7 are selected for simultaneous transmission on the first and second panels, respectively. However, due to the use of analog beamforming, simultaneous transmission of, for example, effective antenna patterns HO and tt1 are not possible, since they are analog beams selected within a panel. As UE implementations vary, a mechanism is needed to allow the TRP to determine which effective antenna patterns can be transmitted simultaneously by the UE based on the use of multiple SRS ports and resources. A second problem is how to determine whether coherent transmission is possible between the SRS ports associated with different SRS resources. The continuity of the relative transmission phase of a UE in LTE applies to all transmission chains, which can be an oversimplification for UEs in the multi-panel NR, since the phase coherence between elements within a panel it can be easier to reach than between panels.
[033] [033] Defining the output power levels of transmitters, downlink base stations and uplink mobile stations, in mobile systems, is commonly referred to as power control (PC). The goals of the PC include improved capacity, coverage, improved system robustness and reduced power consumption.
[034] [034] NaLTE, CP mechanisms can be categorized into groups (i) open loop, (ii) closed loop and (iii) combined open and closed loop. These differ on which input is used to determine the transmission power. In the case of open loop, the transmitter measures some signal sent from the receiver and defines its output power based on this. In the case of closed loop, the receiver measures the signal from the transmitter and, based on this, sends a Transmission Power Control (TPC) command to the transmitter, which then sets its transmission power accordingly. In a combined open and closed loop scheme, both inputs are used to define the transmission power.
[035] [035] In systems with multiple channels between terminals and base stations, for example, traffic and control channels, different power control principles can be applied to different channels. The use of different principles gives more freedom in adapting the power control principle to the needs of the individual channels. The disadvantage is a greater complexity in maintaining several principles.
[036] [036] For example, in LTE release 10, the definition of UE transmission power for a physical uplink control channel (PUCCH) transmission is defined as follows.
[037] [037] Here, Ppuscnc is the transmission power for use in a given subframe and PLp, is the path loss estimated by the UE. For PUSCH, the equation is used instead: PpuscH.c = minfPemax, .c - Ppucer Po, pusca + aPLpi + 10l0g, oM + Vucs + 5) where c denotes the serving cell and Ppyscn, c IS the transmission power for use in a given subframe. In addition, it is noted that PLp is part of the definition of the power level for the UE transmission. From this, it is evident that the estimate of loss of route conducted by the UE plays an important role of the CP. The path loss must, in turn, be estimated from a downlink transmission (DL) and is usually made by measuring a reference signal. SUMMARY
[038] [038] Although NR supports several SRS transmissions to facilitate the use of analog beam formation in UEs, the mechanisms are not yet defined to determine which UE beams can be transmitted simultaneously, or which can be combined in a coherent manner.
[039] [039] According to several modalities described in detail below, a UE indicates that it can transmit a series of distinct SRS resources, where each of the SRS resources comprises a series of SRS ports. This indication can be used by the network to determine how many beams a UE needs for good angular coverage and to determine how many layers the UE can transmit in a similar direction, for example. The indication can also be used to determine how many layers can be transmitted from an UE panel.
[040] [040] In some embodiments, the UE also indicates groups of SRS resources, where each SRS in a group cannot be transmitted simultaneously, but SRS resources in different groups can be transmitted simultaneously. The network can use this information to determine which transmission chains the UE can transmit simultaneously.
[041] [041] In some embodiments, the UE then receives an indication of at least one SRS resource that it must use to determine PUSCH precoding. The UE must apply the same analog precoder or beam generator as used for each SRS port in the selected SRS resource to form a virtualized set of PUSCH-bearing elements, where the virtualized set has the same number of virtualized antennas for PUSCH as per the indicated SRS feature. In some embodiments, the UE may also receive a TPMI indicating a pre-encoder that it must use to combine the virtualized elements, thus allowing the consistent combination of PUSCH antenna elements corresponding to the SRS ports within the selected SRS resource.
[042] [042] Finally, in some of these modalities, the UE transmits a PUSCH using the analog beam formation and / or the pre-coding determined from the selected TPMI and / or SRS.
[043] [043] According to some aspects of the techniques disclosed in the present invention, a UE is adapted for transmission in different antenna subsets transmitting an indication that the UE can transmit several different RS resources, in which each of the RS resources comprises at least one RS port. The UE transmits capacity information indicating that the UE is capable of simultaneous transmission on various RS resources and / or receives first and second RS configurations, where the first RS configuration is a first list of SRS resources that at least correspond the RS resource indications used for PUSCH transmission and the second RS configuration is a second list of RS resources that can be used for SRS transmission. The UE receives an indication of at least one RS resource and transmits a physical channel on UE antennas associated with the indicated RS resources.
[044] [044] According to some modalities, a method in a UE of transmitting in subsets of different antennas in the UE includes transmitting an indication that the UE can transmit several different RS resources, where each of the RS resources comprises several ports of RS. The method includes transmitting an indication of which RS resources the UE can transmit simultaneously. The method additionally includes receiving an indication of at least one RS resource and transmitting a physical channel on UE antennas associated with at least one indicated RS resource.
[045] [045] In some modalities, the UE indicates that it cannot control the relative phase between the antenna ports corresponding to different SRS resources while transmitting on the antenna ports. The UE can then receive an indication of a plurality of SRS resources and then transmit a modulation symbol on an antenna corresponding to one of the SRS resources and a different modulation symbol on a different antenna corresponding to a second SRS feature. In this way, MIMO transmission that is not coherent with different layers of MIMO in different subsets of different antennas can be supported in UEs that do not support a coherent combination of all their transmission chains.
[046] [046] In some related modalities, a UE receives multiple TPMlIs, where each TPMI corresponds to one of the plurality of SRS resources and indicates a pre-encoder to be applied to combine the virtualized elements of the PUSCH antenna corresponding to each port of SRS in each of the SRS resources. In this way, coherent MIMO transmission can be used in transmission chains corresponding to an SRS resource, whereas MIMO transmission not coherent with different layers of MIMO is used for different antenna subsets and corresponding to different SRS resources.
[047] [047] With the techniques and devices described in the present invention, UEs with analog beam formation and multiple TX chains can transmit on all TX chains. UEs that support a coherent combination of different analog beams can transmit a MIMO layer on different analog beams. UEs that do not support a consistent combination of analog beams can transmit different layers of MIMO in different analog beams.
[048] [048] According to some modalities, a method, on a network node of a wireless network, to receive transmissions from a UE on different antenna subsets in the UE includes receiving an indication that the UE can transmit several resources of Distinct RS, where each of the RS features comprises multiple RS ports. The method also includes receiving an indication of which RS resources the UE can transmit simultaneously and selecting at least one RS resource based on the received indications. The method additionally includes transmitting an indication of at least one selected RS resource to the UE and receiving a physical channel transmitted by the UE on UE antennas associated with at least one
[049] [049] According to some modalities, a method, on a network node of a wireless network, to receive transmissions from a UE on different antenna subsets in the UE includes receiving an indication that the UE can transmit several resources of Distinct RS, where each of the RS features comprises at least one RS port. This method additionally includes receiving capacity information that indicates that the UE is capable of transmitting simultaneously on several RS resources and / or sending the first and second RS configuration to the UE, where the first RS configuration is a first list of SRS resources that corresponds at least to the RS resource indications used for PUSCH transmission and the second RS configuration is a second list of RS resources that can be used for SRS transmission and / or send the UE a transmission request, in which the transmission request is constructed by the network node to avoid instructing the UE to transmit SRS resources that the UE cannot transmit simultaneously. This method additionally includes selecting at least one RS resource based on the received indications, transmitting an indication of at least one selected RS resource to the UE and receiving a physical channel transmitted by the UE on UE antennas associated with at least one resource selected RS.
[050] [050] According to some modalities, a UE adapted to transmit in different antenna subsets in the UE includes a transceiver circuit, a processor operatively coupled to the transceiver circuit and a memory coupled to the processing circuit, the memory storing instructions for execution by the processor, the processor being configured to control the transceiver circuit. The transceiver circuit is controlled to transmit an indication that the UE can transmit several distinct RS resources, where each of the RS resources comprises a series of RS ports and transmit an indication of which RS resources the UE can transmit simultaneously . The transceiver circuit is also controlled to receive an indication from at least one RS resource and transmit a physical channel on UE antennas associated with at least one indicated RS resource.
[051] [051] According to some modalities, a network node of a wireless network adapted to receive transmissions from a UE in different antenna subsets in the UE includes a transceiver circuit, a processor operationally coupled to the transceiver circuit and a memory coupled to the processing circuit, the memory storing instructions for execution by the processor, and the processor is configured to control the transceiver circuit. The transceiver circuit is controlled to receive an indication that the UE can transmit several distinct RS resources, where each of the RS resources comprises a series of RS ports. The transceiver circuit is also controlled to receive an indication of which RS resources the UE can transmit simultaneously and select at least one RS resource based on the received indications. The transceiver circuit is controlled to transmit an indication of at least one selected RS resource to the UE and receive a physical channel transmitted by the UE on UE antennas associated with at least one indicated RS resource.
[052] [052] Other modalities may include devices, computer program products and non-transitory computer-readable media that store instructions that, when executed by the processing circuit, perform the operations of the modalities described above. BRIEF DESCRIPTION OF THE FIGURES
[053] [053] Figure 1 illustrates the basic physical resources of NR.
[054] [054] Figure 2 illustrates the LTE time domain structure with 15 kHz subcarrier spacing.
[055] [055] Figure 3 illustrates the transmission structure of spatial multiplexing pre-coded in NR.
[056] [056] Figure 4 illustrates an example of an EU antenna array with 8 elements and 4 panels.
[057] [057] Figure 5 illustrates an example of two panels with four distinct effective antenna patterns per panel.
[058] [058] Figure 6 is a signal flow and process diagram illustrating an exemplary technique according to some embodiments of the present invention.
[059] [059] Figure 7 illustrates an UE supporting a different number of SRS features per panel.
[060] [060] Figure 8 illustrates an exemplary UE.
[061] [061] Figure 9 is a process flow diagram illustrating an exemplary method according to some modalities.
[062] [062] Figure 10 illustrates an exemplary network node.
[063] [063] Figure 11 is a process flow diagram illustrating another exemplary method according to some modalities.
[064] [064] Figures 12 and 13 illustrate achievable channel gains between different transmission schemes and different codebooks for rating 1 transmission over 2 single port panels at 28 GHz.
[065] [065] Figures 14 and 15 illustrate achievable channel gains between different transmission schemes and different codebooks for rating 1 transmission over 4 single port panels at 28 GHz.
[066] [066] Figure 16 is a functional representation of an exemplary UE.
[067] [067] Figure 17 is a functional representation of an exemplary network node.
[068] [068] As discussed above, a UE can be instructed to transmit PUSCH using multiple SRIs and such transmission can be done in a coherent or non-coherent manner. For a TRP or gNB to associate a particular SRI with an effective UE antenna pattern, an eNB (or gNB, or other base station or access point) must know how many effective antenna patterns are required by the UE, and in addition, how many antenna ports the UE must transmit simultaneously using the same effective antenna pattern.
[069] [069] Figure 6 illustrates a flow chart that summarizes some modalities of techniques described in the present invention to address these issues. In the figure, as in the remainder of this document, the term "UE" can be understood to refer to any wireless device that supports the transmission of SRS across multiple SRS resources, while the term "TRP" can correspond to one eNB, gNB, access point or other transmission point or to a controller for one or more transmission points. Similarly, the term "gNB", commonly used to describe base stations in NR, should be understood here as referring more generally to refer to any base station, access point or transmission point.
[070] [070] In the first step shown in Figure 6, the UE transmits information regarding how many SRS resources the UE would like to use, how many SRS resources can be transmitted simultaneously and the number of ports per SRS resource (block 602). This can include indicating the number of SRS resource groups, the number of SRS resources per group, and the number of SRS ports per SRS resource. In some embodiments, this step includes an indication of which SRS resources can be transmitted simultaneously by the UE. In some modalities described in more detail below, the SRS resources that can be transmitted simultaneously can be determined using a fixed mapping based on the number of SRS resource groups and the number of SRS resources per group. In other modalities, more parameters are used to identify the SRS resources that can be transmitted simultaneously. In general, this step can be done in many different ways, as will be described in more detail below.
[071] [071] In the next step shown in Figure 6, the TRP defines, based on the information regarding the UE capacities received in the first step, the SRS resources that should be used for the UE and signals that information to the UE (block 604 ). This may comprise configuring the UE with SRS resources and the corresponding SRIs based on the information on the UE's capabilities.
[072] [072] Whenever the UE must be staggered for UL transmission, the TRP begins with the transmission of an SRS Transmission Request to the UE, informing the UE which SRS resources must be transmitted (block 606). Based on the previous configuration of the SRS resources, the UE can directly map each SRS resource to a specific beam in a given transmission chain. The TRP can use the indication of which SRS resources can be transmitted simultaneously by the UE to avoid instructing the UE to simultaneously transmit SRS resources that it cannot transmit simultaneously.
[073] [073] In the next step, the UE transmits the SRS resources (block 608) and the TRP measures on them and determines the preferred SRS resource (s) and the corresponding TPMI (s) for the next UL transmissions (block 610). The TRP then signals the SRI (s) and TPMI (s) to the UE and the UE applies them for the next PUSCH transmission (block 612). It is observed that arrows and text boxes with dashed lines are optional elements, in that they do not necessarily need to appear in all implementations or in all instances of the illustrated method.
[074] [074] Here, mechanisms are described to indicate the UE's capacity for SRS resources and PUSCH transmission. These mechanisms can be understood through the exemplary configuration of Figure 5, in which the analog beam formation is used in 4 transmission chains, with 2 transmission chains per "panel" and the panels covering different directions. Of course, these mechanisms can be generalized to cover any number of "panels" or sets of transmission chains with any number of transmission chains per set.
[075] [075] In the example shown in Figure 5, since there are 4 unique beams per panel (since each transmission chain in one panel uses the same viewing angles of the 4 beams as the other transmission chain in the same panel), The EU then has 8 unique beams that it can produce. These are numbered from 0 to 7 in the figure. Since each beam can be received at a different power level by the TRP, the TRP must be informed of the total number of beams (or, more generally, effective antenna patterns) that the UE can produce. One way to do this is for the UE to indicate to the TRP that the UE can support (or, alternatively, require) 8 SRS resources as an UE capacity. In general, the number of SRS features in the UE capability may reflect cases where there are a different number of beams per panel; in this case, the number of SRS features is just the sum of all the SRS features required for each panel, that is, the number of distinct beams that each panel can produce or that is needed to provide sufficient angular coverage for the beams in the panel. In some cases, the UE may have overlapping beams across panels, so a given beam direction can be used only on one panel and the total number of SRS features in the UE's capacity would be the number of beams sufficiently not overlapping.
[076] [076] To continue the example, it is assumed that 8 SRS resources, each with 2 SRS ports corresponding to each of the transmission chains on one of the panels, are then configured for the UE. If the TRP wishes the UE to transmit on all TX chains, it must know which SRS resources correspond to each TX chain. This can be identified in an equivalent way by which SRS resources can be transmitted simultaneously by the UE.
[077] [077] In a modality, suitable for when a single number of beams per panel is supported by the UE, it is determined which SR resources can be transmitted simultaneously by a rule based on the number of SRS resources that are associated with each panel. In a two-panel example, SRS resources with O .. Nv -1 indexes are implicitly transmitted in the tHt1 panel, whereas SRS resources with Np ... 2 * Nv -1 indexes are for the tt2 panel, where Nv is the number of beams (or equivalent SRS resources) per panel (and Nh. = 4 in the example in Figure 5). In general, when two panels have the same number of N beams, two SRS resource indexes k: and kz can be assumed by the TRP to be capable of simultaneous transmission, for example, in the same OFDM symbol, if | k] / N,] = | k2 / Ny]. If more than one SRS resource pair is transmitted simultaneously, then the rule lk; / Ny] Is [&; / Np] is used to determine whether all SRS resources can be transmitted simultaneously, where ki and kj are i- th and j-th SRS resource indices to be paired and all combinations of SRS resource pairs to be transmitted simultaneously must satisfy the rule.
[078] [078] The SRS resource indexing used to determine which SRS resources can be transmitted simultaneously or which SRSs to transmit on the uplink may not be the same as the indexing used for SRI that indicates how PUSCH should be transmitted. This is because the set of SRS resources that can be transmitted by a UE is generally greater than the number of SRS configured for a UE for PUSCH transmission at any one time. Configuring UE to transmit PUSCH using a subset of all SRS resources it can transmit allows fewer SRI bits to be used to signal the subset instead of the entire possible SRS resource set. Therefore, in some embodiments, a UE is configured with a first list of SRS resources that correspond to the SRS resource indications used for PUSCH transmission (SRIs) and with a second list of SRS resources in which the UE can transmit SRS .
[079] [079] In some modalities, the number of beams per panel may be different. Assuming that panel k (or equivalent SRS resource group k) uses N, bundles (or equivalent SRS resources), SRS resources O, ..., Nha - 1 is implicitly associated with panel H1 and cannot be transmitted simultaneously while SRS resources Ny1, .., Nv1a + Nh2-1 are associated with the H2 panel and cannot be transmitted simultaneously, and so on.
[080] [080] In other modalities, suitable for when a different number of beams can be supported for each panel by the UE, which SRS resources that can be transmitted simultaneously can be configured per panel. Multiple lists of SRS resources are built, each list comprising a set of SRS resources that cannot be transmitted simultaneously. All other combinations of SRS resources can be transmitted simultaneously. Each list of these SRS features could correspond to the beams on each panel that cannot be transmitted simultaneously, for example, analog beams that are selected for each panel. The lists do not have to be exactly the same length or identify the same number of beams that cannot be transmitted simultaneously, which allows different numbers of beams to be associated with each list and, therefore, with each panel. In one embodiment, each list with Index / comprises a bitmap of length N p, max, E bit with index m in the list / corresponds to the SRS resource k, where k = INymax tm ek, lem are integers with a minimum value zero. The Nv, max quantity can alternatively be identified as the maximum number of SRS resources in each SRS resource list and each SRS resource list can be identified as an "SRS resource group" or a "set of SRS resources ".
[081] [081] An example of the use of the latter modalities can be illustrated using the UE configuration of Figure 7 below, in which the HH1 panel supports 4 beams, but the H2 panel has 2 beams. Two lists (one for each panel) would be required, where the first and second lists are represented as (1111) and (1100), respectively. SRS k E resources (0, 1,2,3) could not be transmitted simultaneously and would be associated with the first list (and panel), whereas SRS k E resources (4,5) could not be transmitted simultaneously and would be associated with the second list (and panel),
[082] [082] In a variant of the previous modalities, each list comprises a bitmap of Knmax bits, where Kmax IS The total number of SRS resources and each bit corresponds to an SRS resource. For the UE configuration in Figure 7, the two lists defining which resources cannot be transmitted simultaneously would be represented by (111100) and (000011), respectively.
[083] [083] In yet another variant of the previous modalities in relation to Figure 7, signaling is done instead by signaling that resources cannot be transmitted simultaneously when signaling (4, 2), which means that SRS kEfo resources , 1,2,3) could not be transmitted simultaneously and whereas the SRS k E (4, 5) resources could not be transmitted simultaneously. The order of this signaling can therefore be important and used to mark individual SRS resources; the signaling (4, 2) could be translated into the list: SRS resource index O: panel 1, beam O inside the panel, SRS resource index 1: panel 1, beam 1 inside the panel, resource index of SRS 2: panel 1, beam 2 inside the panel, SRS resource index 3: panel 1, beam 3 inside the panel, SRS resource index 4: panel 1, beam O inside the panel, SRS resource index 5 : panel 1, beam 1 inside the panel,
[084] [084] Thus, any gNB signaling to indicate a particular beam could use this indexing. Based on the UE 14, 24 capacity signaling, it also implies an SRS Resource Index for beam mapping. This mapping can, for example, make it clear that SRI E (0,1,2,3) corresponds to panel 1, while SRI E (4, 5) corresponds to panel 2. For the more general case (N1, N2 , ..., Nq), this would imply that the resource resource indexes
[085] [085] In other modalities suitable for when any SRS resource can be associated with any panel, a list of all possible combinations of SRS resources is used for a given number of panels (or, equivalently, groups of resources SRS, groups of SRS resource groups) to identify which combinations of SRS resources can be transmitted. The list of permitted SRS feature combinations is generated as a combinatorial index r defined as: NA -.
[086] [086] As discussed above, a UE with UL MIMO capability may not be able to transmit, coherently, between some or all of its Tx chains and the TRP should be aware of this limitation. In the simplest case, the UE cannot transmit coherently between any group of its Tx chains. Such an EU could indicate that it cannot transmit consistently across any combination of transmission chains. In one embodiment, this indication that it cannot transmit consistently across any transmission chain can be identified when the UE with UL MIMO capability does not indicate that it can support the continuity of the relative phase between the Tx chains.
[087] [087] It is also possible that a UE can support coherent transmission in the Tx chains within a panel, but not across panels. In one embodiment, such UE indicates which SRS resources can be transmitted together in a coherent manner, indicating whether it can coherently transmit PUSCH DMRS antenna ports corresponding to the SRS resources that are in different lists of SRS resources (or, equivalent way, different panels, SRS resource sets or SRS groups), plus PUSCH DMRS antenna ports corresponding to the SRS ports that are in each of your SRS resources. Such an indication may be that it supports relative phase continuity between all SRS resources corresponding to different SRS resource lists (or, equivalently, different panels, SRS resource sets or SRS groups).
[088] [088] In other cases, a UE may be able to transmit in a coherent manner only between some of its panels. Therefore, in another embodiment, a UE indicates that it can consistently transmit PUSCH DMRS antenna ports corresponding to the SRS resources between subsets of SRS resource lists (or, equivalently, subsets of panels, SRS resource sets or SRS groups) in addition to PUSCH DMRS antenna ports corresponding to the SRS resources that are in each of your SRS resources. Such an indication may be that it supports the continuation of the relative phase between a set of SRS resource lists (or, equivalently, different panels, SRS resource sets or SRS groups). The set of SRS resource lists can be identified by a bitmap of coherent SRS resource lists, the bitmap being of length N ,, where N, is the number of SRS resource lists (or, equivalently, the number of panels, SRS resource sets, or SRS groups). A "1" in the bitmap of coherent SRS resource lists, for example, indicates that all PUSCH DMRS ports associated with SRS resources in the corresponding SRS resource list can be transmitted in a manner consistent with other associated DMRS ports to the SRS resources in the list of coherent SRS resources that also have a "1" in the bitmap. An "O" in the coherent SRS resource list bitmap indicates that all PUSCH DMRS ports associated with the SRS resources in the SRS resource list cannot be transmitted in a manner consistent with any other PUSCH DMRS ports.
[089] [089] In some modalities, the DCI Format comprising granting UL by staggering a PUSCH transmission is scaled according to the indicated capacity of the UE for SRS resources. For example, since the SRS resources in a list of SRS resources, according to some modalities, cannot be transmitted simultaneously, at most one SRS resource per list of SRS resources (or, in an equivalent way, group of resources). SRS resources) can be indicated in the form of an SRI in the scaling of the PUSCH DCI. Therefore, in one embodiment, the SRI indication field comprises N, subfields, where each subfield k = 1, ..., No comprises log2 [1 + Nyx] bits. Each subfield is associated with a list of SRS resources (or, in an equivalent way, SRS resource group) composed of SRS Ni resources, which cannot be transmitted simultaneously. Each code point in the bit field indicates an SRS resource in the list or that no SRS resource in the list is used.
[090] [090] When a UE is configured to be able to transmit using multiple SRIs, the SRS resources can be associated with different Tx chains and, therefore, a subset of the UE's antennas. If there are multiple SRS ports on the SRS feature, TRP could use the SRS ports to determine a TPMI that identifies a precoder for use in the antenna subset for PUSCH transmission. Consequently, each SRS resource and, optionally, each TPMI would correspond to a different subset of the UE's antennas. Therefore, in one embodiment, when a UE is signaled with an SRI, it transmits a physical channel, such as PUSCH, using the pre-encoders indicated by TPMI on the UE antennas associated with the signaled SRS feature.
[091] [091] In some modalities that support multiple SRIs, when a UE further indicates that each of a combination of SRS resources can be transmitted simultaneously and it is signaled that a plurality of SRIs that can be transmitted simultaneously, the UE transmits simultaneously in multiple subsets of your antennas. In some related modalities in which the UE can additionally transmit PUSCH in a coherent way on antennas corresponding to the SRS resources, the UE can be signaled to a single TPMI that identifies a pre-coding matrix or a single pre-coder to apply in the PUSCH on all antennas corresponding to the multiple SRIs to which it is signaled. In other related modalities in which the UE cannot additionally transmit PUSC in a coherent way on antennas corresponding to the SRS resources, the UE transmits different modulation symbols and, therefore, different layers of MIMO in the different antenna subsets corresponding to the signaled SRIs . In a similar modality in which the UE cannot transmit in a coherent way, the UE may have signaled a single TPMI for each SRS resource that identifies a single pre-encoder or pre-encoding matrix to apply to PUSCH in the antenna subset corresponding to each of the multiple SRiIs to which it is signaled.
[092] [092] Since different panels can be directed in different directions, the propagation environment they admit can potentially be very different. It may also be that they are transmitting to different TRPs in a transmission of multiple TRPs. In some embodiments of the invention, the UL power control is therefore connected to the panel. Thus, returning to the previous modality in Figure 7 in which the analog beam formation is used in 4 transmission chains, with 2 transmission chains per "panel" and the panels covering different directions that the UE can connect its power control to the panel . So, for example, if the power control is based on CSI-RS, the UE can be configured with two different CSI-RSs and then base the power control from panel 1 from the CSI-RS, the power control to panel 2 is based on CS | - RS2. In this way, the open mesh part of the power control will be specific to the panel, since the path loss estimate for the power control is specific to the panel. In addition, for power control, a set of parameters are usually configured (alpha, Po etc.) and they can then be configured per panel based on the signaled capacity of the UE.
[093] [093] In other modalities, two separate power control loops are used, but the path loss estimate is based on the same
[094] [094] In some modalities, closed-loop power control is done per panel when transmitting a TPC command per panel. In such cases, one or both of the SRS and PUSCH powers transmitted from a panel can be used for uplink power measurement and both SRS and PUSCH can have their transmission power controlled by a TPC command. The power control command for each panel can, therefore, be associated with an SRS resource and, in some modalities, with a list or group of SRS resources.
[095] [095] In some modalities related to panel power control, when multiple SRIs are assigned to a UE, it transmits using power levels corresponding to each of the power control commands, which in turn correspond to each of the resources of SRS. Since SRS lists, groups or resources can correspond to subsets of the UE antennas, when multiple SRIs are indicated, power control commands can be used to define the power in different subsets of different antennas when transmitting simultaneously on the different antenna subsets. This can have the advantage of allowing different amplitude weighting in antenna elements, even when the code books associated with TPMI have only unit magnitude weightings. These unevenly weighted antenna arrays can perform better.
[096] [096] In some modalities, the PHR (power headroom report) is reported by the panel.
[097] [097] Figure 8 illustrates a block diagram of a wireless device 50 in a wireless communication system (for example, a cellular communications system) in which the embodiments of the present invention can be implemented. The wireless device 50 can be a UE. The term "UE" is used in the present invention in its broadest sense to refer to any wireless device. As such, the terms "wireless device" and "UE" can be used interchangeably in the present invention. In general, wireless device 50 may additionally represent a target device, a UE D2D, a machine-type UE or a machine-to-machine-capable UE (M2M), a sensor equipped with a UE, an iPAD, a tablet , a mobile terminal, a smartphone, Laptop Embedded Equipment (LEE), Laptop Mounted Equipment (LME), Universal Serial Bus (USB) dongles, Equipment at Client Facility (CPE), a loT (Internet capable) device of Things) or any other device capable of communicating with a 5G and / or NR network, etc.
[098] [098] As shown in Figure 8, wireless device 50 includes processing circuitry 52 consisting of one or more processors 62 (for example, Central Processing Units (CPUs), Application Specific Integrated Circuits (ASICs), Port Arrangement Field Programmable (FPGAs) and / or the like) and a memory 64 that stores computer programs 68 and, optionally, configuration data 68. Wireless device 50 also includes transceiver circuits 56, including one or more transmitters or receivers coupled to one or more antennas 54. In some embodiments, the functionality of the wireless device 50 described above may be implemented in whole or in part in software (for example, computer programs 66) that are stored in memory 64 and executed by the processor (s) ( s) 62.
[099] [099] In some embodiments, a carrier is provided containing the computer program products described in the present invention. The carrier is one of an electronic signal, an optical signal, a radio signal or a computer-readable storage medium (for example, a non-transitory computer-readable medium, such as memory).
[0100] [0100] In some embodiments, a computer program including instructions that, when executed by at least one processor, cause this at least one processor of the wireless device 50 to perform any of the UE-related techniques described in the present invention.
[0101] [0101] Wireless device 50 (eg UE) or similar wireless device can be configured, for example, to perform method 900 shown in Figure 9. Method 900 includes transmitting an indication that the UE can transmit several distinct RS resources, where each of the RS resources includes a series of RS ports - this is shown in block 902. The exemplary method 900 additionally includes transmitting an indication of which RS resources the UE can transmit simultaneously, as shown in block 904, and receive an indication of at least one RS resource, as shown in block 906. Note that transmitting an indication of which RS resources the UE can transmit simultaneously is a specific example transmission information from the UE indicating that the UE 50 is capable of simultaneous transmission on multiple resources.
[0102] [0102] Not shown in the exemplary method 900, but discussed above, the UE 50 can receive first and second RS configurations from the network, for example, where the first RS configuration is a first list of SRS resources that correspond at least the RS resource indications used for PUSCH transmission and the second RS configuration is a second list of RS resources that can be used for SRS transmission. In several embodiments, this step can be an alternative to the step shown in block 904 or an additional step.
[0103] [0103] Method 900 also includes, additionally, transmitting a physical channel in UE antennas associated with at least one indicated RS resource,
[0104] [0104] In some modalities, the 900 method includes, in addition, transmitting layers of MIMO in different subsets of antennas in the UF. In these embodiments, method 900 also includes transmitting an indication that the UE cannot control the relative phase between the antenna ports corresponding to different RS resources when transmitting on the antenna ports. The step of receiving an indication of at least one RS resource comprises, in addition, receiving a plurality of RS resources and a precoder corresponding to each one among the plurality of RS resources. The step of transmitting the physical channel comprises using the precoders indicated on UE antennas associated with each of the indicated RS resources.
[0105] [0105] Method 900 may also include receiving an indication of at least one precoder corresponding to each of the at least one RS resource and transmitting the physical channel using the precoders indicated on UE antennas associated with the RS indicated.
[0106] [0106] Method 900 may include adjusting the transmitted power of a plurality of RS resources, where the RS resources are transmitted simultaneously and the transmitted power of each of the RS resources is adjusted by a power control command which is distinct from the power control commands adjusting the other RS features. In some embodiments, the 900 method may include adjusting the transmitted power of a PUSCH corresponding to one or more RS resource indicators or adjusting the transmitted power of one or more SRS resources corresponding to the respective RS resource indicators, or both, wherein the transmitted power corresponding to each or more RS resource indicators or each of the respective RS resource indicators is adjusted by power control commands that are distinct from the power control commands by adjusting the transmitted power corresponding to others among the one or more SR resource indicators or respective SR resource indicators.
[0107] [0107] In some embodiments, a plurality of RS resources are indicated to the UE and the method (900) additionally includes transmitting the physical channel in a plurality of antenna subsets corresponding to the plurality of indicated RS resources, using a preset -coder that jointly adjusts the phase of all RS ports comprised within the plurality of indicated RS resources.
[0108] [0108] Figure 10 is a block diagram illustrating an example of network node 30 in a wireless communication system (e.g., a cellular communications system) in which the modalities of the present invention can be implemented. The network node 30 can be a network access point, for example, such as an eNB or gNB. In the illustrated example, network node 30 is a radio access node, Transmitting and Receiving Point (TRP), base station or other general radio node that allows communication within a radio network. In various embodiments, network node 30 can also represent, for example, a transceiver base station, a base station controller, a network controller, an enhanced or evolved Node B (eNB), a Node B, a gNB (point supporting NR or 5G), Multi-Cell / Multicast Coordination Entity (MCE), a relay node, an access point, a radio access point or a Remote Radio Unit (RRU), Remote Radio Head ( RRH). It will be appreciated that some of these examples do not include radio circuits for communication with UEs, but are connected via communication interface circuit (s) 38 with one or more other network nodes with such capacity. In some embodiments, network node 30 provides wireless access to other nodes, such as wireless device 50 or other access nodes within a coverage area (e.g., cell) of network node 30. The network node 30 described in the present invention is configured to operate on an NR network, but may be applicable to other networks or standards that use the techniques discussed in the present invention.
[0109] [0109] As illustrated in Figure 10, network node 30 includes processing circuits 32 comprising one or more processors 42 (for example, CPUs, ASICs, FPGAs and / or the like) and a memory 44 that stores computer programs 46 and , optionally, configuration data 48. Network node 30 may include communication interface circuitry 38 to communicate with the core network or other network nodes. The illustrated network node 30 also includes transceiver circuits 36, which may include one or more transmitters and receivers coupled to one or more antennas 34 for communication with wireless devices, such as the wireless device 50. In some embodiments, functionality the network node 30 described in the present invention can be implemented in whole or in part in software that is, for example, stored in memory 44 and executed by processor (s) 42.
[0110] [0110] In some embodiments, the memory 44 of the network node 30 stores instructions that, when executed by one or more of the processors, 42 configure the network node 30 to perform one or more of the techniques described in the present invention.
[0111] [0111] Network node 30, either operating individually or in combination with one or more other network nodes, can be configured to perform the method illustrated in Figure 11, for example, and the variants of it. The 1100 method, as shown in Figure 11, includes the steps of receiving an indication that the UE can transmit several distinct RS resources, where each of the RS resources comprises several RS ports - this is shown in block 1102. The exemplary method 1100 also includes receiving an indication of which RS resources the UE can transmit simultaneously,
[0112] [0112] Although not illustrated in the exemplary method 1100, network node 30 may, in some modalities, send the first and second RS configurations to the UE, where the first RS configuration is a first list of SRS resources that at least least correspond to the RS resource indications used for PUSCH transmission and the second RS configuration is a second list of RS resources that can be used for SRS transmission. In some embodiments, network node 30 may send a transmission request to the UE, where the transmission request is constructed by network node 30 to avoid instructing the UE to transmit SRS resources that the UE cannot transmit simultaneously, for example. example, using capacity information provided by the UE.
[0113] [0113] Method 1100 further comprises transmitting an indication of at least one selected RS resource to the UE, as shown in block 1108, and receiving a physical channel transmitted by the UE on UE antennas associated with at least one RS resource indicated, as shown in block 1110.
[0114] [0114] Method 1100 may additionally include receiving layers of MIMO transmitted in different subsets of antennas in the UE and receiving an indication that the UE cannot control the relative phase between antenna ports corresponding to different RS resources when transmitting in the antenna ports. The step of transmitting an indication of at least one RS resource can include transmitting a plurality of RS resources and a precoder corresponding to each of the plurality of RS resources. The received physical channel can be transmitted using the precoders indicated on UE antennas associated with each one of the indicated RS resources.
[0115] [0115] Method 1100 may additionally include receiving an indication from at least one precoder corresponding to each of the at least one RS resource and transmitting the physical channel using the precoders indicated on UE antennas associated with the RS resource indicated.
[0116] [0116] Method 1100 may include transmitting power control commands to the UE for each of a plurality of UE's RS resources, in which the RS resources are transmitted simultaneously and the power transmitted from each of the resources of RS is adjusted by a power control command that is distinct from the power control commands by adjusting the other RS resources.
[0117] [0117] In some embodiments, a plurality of RS resources are indicated to the UE and method 1100 includes, additionally, receiving the physical channel transmitted in a plurality of antenna subsets corresponding to the plurality of indicated RS resources, using a pre- coder that jointly adjusts the phase of all RS ports comprised within the plurality of indicated RS resources.
[0118] [0118] Other embodiments of the inventive techniques and apparatus disclosed in the present invention include computer programs and computer program products, including instructions that, when executed by at least one processor of the wireless device 50, cause at least one processor of the wireless device. wireless device 50 perform one or more of the methods described above. Similarly, modalities include computer programs and computer program products, including instructions that, when executed by at least one processor on a network node, cause at least one processor on network node 30 to perform one or more among the methods described above for network node 30.
[0119] [0119] The following provides additional context and details to complement the various techniques described above.
[0120] [0120] Some agreements for the structure of UL MIMO codebooks, such as those coming from RAN1H88 and RAN1t88hbis, include NR with support for scaling UL MIMO by DCI. This support may include an indication that an SRI was transmitted by this UE at a time in the previous time. Each configured SRS resource is associated with at least one UL Tx precoder / beam; no SRI is required when configuring a single SRS resource. Support for UL MIMO can also include a TRI for possible values that go to the number of SRS ports configured in the indicated SRI and a broad band of TPMI. TPMI is used to indicate a preferred precoder over the SRS ports in the SRS resource selected by the SRI. Pre-coding arrays may depend on the number of SRS ports configured on the indicated SRI. This field can be used for UL MIMO transmission not based on codebook and the TPMI subband can be signaled. There can be several ways to indicate the selection of various SRS resources.
[0121] [0121] When a UE is configured with UL frequency selective pre-coding and if the subband TPMI signaling is supported, one of the following alternatives can be supported: 1) the subband TPMIs are signaled via DCI to the UE only for PRBs allocated for a given PUSCH transmission; or 2) subband TPMIs are signaled via DCI to the UE for all PRBs in UL, regardless of the actual RA for a given PUSCH transmission. The TPMI subband can correspond to W2 if dual stage code books are supported. Broadband TPMI can always be signaled along with the TPMI subband.
[0122] [0122] In addition, there may be a predetermined minimum number, as well as definition, of the X and Y ports that are used to support selective frequency pre-coding for various schemes, for example, scheme A and B. Scheme A is a UL transmission based on a codebook related to a previous agreement that involves support for frequency selective pre-coding for CP-OFDM when the number of transmission ports is equal to or greater than X. B is a UL transmission not based on codebooks related to the frequency selective pre-coding support for CP-OFDM when the number of transmission ports is equal to or greater than Y.
[0123] [0123] The main difference between UL transmission schemes based on codebooks and not based on NR codebooks is that, for UL transmission based on codebooks, TPMI is signaled to the UE, whereas, for UL transmission not based on a codebook, TPMI is not signaled. Another difference is that, for UL transmission based on codebooks, no power amplifiers (PAs) are intended (or are allowed) to be mapped to more than one SRS port in order to preserve the use of the power amplifier. when applying additional pre-coding on the SRS ports. For UL transmission not based on a codebook on the other side, APs are intended (or are allowed) to be mapped to multiple SRS ports as no additional pre-coding will be applied to the SRS ports.
[0124] [0124] In some modalities, for UL transmission based on codebooks, at least one TPM! is signaled back to the UE to determine the precoder for UL transmissions. In other modalities, for UL transmission not based on codebooks, no TPMI is signaled back to the UE. Instead, SRI (s) can (s) be signaled back to the UE to determine the precoder for UL transmissions.
[0125] [0125] A primary trigger for TPMI overhead is whether broadband or frequency selective TPMI is supported. TPMI overhead can be reasonably carried over in PDCCH and upper limits can be determined for which gain may be possible from frequency selective pre-coding.
[0126] [0126] Signaling to support selective frequency pre-coding based on code books on the upward and downward link is fundamentally different. In the downlink, TPMI signaling can be avoided, since the UE can determine the effective channel by measuring the DMRS. However, in UL MIMO based on codebooks, the UE must be aware of the pre-coding desired by gNB and, therefore, must be signaled with TPMI.
[0127] [0127] A second difference between downlink and uplink pre-coding is that UCIl payloads can have a wide variety of sizes, whereas a UE is configured for only a small number of DCI formats with fixed sizes. Therefore, the PMI for MIMO of DL can have very different sizes, while the TPMI for MIMO of UL should preferably be of a fixed size. Note that DCI signaling in two phases is possible to support additional overhead, but such a two-stage design, in general, could significantly complicate NR control signaling and may not be preferred in at least one first version of NR .
[0128] [0128] Another difference is that UCI can be realized in a wide variety of PUCCH formats, as well as PUSCH, which allows UCI to adapt according to coverage requirements. Although PDCCH supports compact and larger DCI formats to allow for different coverage conditions, there is considerably less flexibility.
[0129] [0129] Another observation is that PDCCH of NR must have the same coverage as PDCCH in LTE and, therefore, the format sizes must be similar. This can be used as an approximate guide for TPMI sizes for UL MIMO in NR. It is observed that up to 6 bits are used for 4 Tx pre-coding and classification indication and that 5 bits are used for MCS of a second transport block, with 1 bit for a new data indicator. Therefore, a total of 11 bits for all TPMI, SRI and RI would have a consistent amount of overhead over LTE with respect to the UL MIMO operation.
[0130] [0130] It was observed that about 10 DCI bits for all between TPMI, SRI and RI can be used as a starting point for the UL MIMO codebook project in NR.
[0131] [0131] The performance of the broadband and sub-band of TPM! will be discussed now. The number of bits required for the selective TPM frequency! tends to be proportional to the number of sub-bands. In this section, high-level simulation results obtained by the inventors are presented, comparing the gains from ideal transmission arrangements based on classification 1 subband TPMI to that using broadband transmission. The upper and lower limit performances are evaluated by the ideal closed-loop MIMO (CL) based on the SVD of subband correlation matrices and an ideal transmission diversity scheme (TXD). For a performance comparison, the Release 8 code books and an exemplary code book were evaluated with non-constant module elements. Classification pre-coding 1 is used, since it tends to have the biggest gains and, thus, can serve as an initial check against the merits of the subband TPMI. The graphs shown in Figures 12-15 are obtained using the channel realizations extracted from the system level simulators with the 3GPP assessment assumptions to model a single link. Therefore, considerations at the system level, such as interference between UEs are not captured in the performance comparison. An ideal channel estimate is used. Consequently, the results can be considered as upper limits on the frequency selective pre-coding gains. The simulation results for UEs equipped with multi-panels are shown in Figures 12 to 15. Two (four) UE antennas are implemented as two (four) single-door panels to transmit signals from different angles, that is, in angles of O degree and 180 degrees (O degree, 90 degrees, 180 degrees and 270 degrees) in azimuth.
[0132] [0132] Figures 12 to 13 show evaluation results for transmission of classification 1 on 2 panels of a door with a channel bandwidth of 10MHz in the frequency of 28GHz. In these simulations, three different sub-band sizes are compared, namely 1 PRB and 12 PRBs per sub-band, in addition to broadband transmission, assuming 48 PRBs in total, which is depicted in different curves grouped by ellipses in the figures.
[0133] [0133] From these results, it is observed that the maximum gain (essentially theoretical) up to 0.4 dB is achievable by the transmission based on subband TPMI with one PRB per subband on the broadband transmission. More realistic numbers of sub-bands, such as 4 sub-bands, produce in the order of 0.15 dB of median gain.
[0134] [0134] Comparing the code books, it can be seen that the example code books tend to outperform Release 8 code books, often with an average gain in the order of 1.0 dB. Exemplary code books with a 3-bit overhead really outperform Release 8 code books, even when Release 8 code books use many more bits (with TPMI per subband). The gains from exemplary code books are expected largely due to their use of non-constant module elements and thus it is concluded that a larger code book with non-constant module elements may be a better performance solution than using more sub- bands with a Release 8 code books (constant module). This is particularly true for millimeter wave cases, since the directivity of the different panels can lead to widely varying power levels received in the gNB from the panels.
[0135] [0135] Figures 12 and 13 illustrate a performance comparison dealing with achievable channel gains between different transmission schemes and different codebooks for rating 1 transmission over 2 panels of a port at a frequency of 28 GHz.
[0136] [0136] Figures 14 and 15 illustrate a performance comparison addressing achievable channel gains between different transmission schemes and different code books for 1-panel 4-port rating transmission at 28 GHz. The simulation results for Class 1 transmission on 4 door panels are provided in Figures 14 and 15. Similar observations can be made for these 4 door panels. In particular, the gain from practical subband numbers in frequency selective pre-coding is again a few tenths of a dB. However, since 4-port codebooks are larger than 2-port codebooks, the TPMI overhead for 4-port subband precoding to achieve the same subband precoding gains of 2 doors is much bigger. Therefore, subband TPMI seems less motivated for 4 ports than for 2 ports.
[0137] [0137] It was observed that the gains from the subband TPMI with practical numbers of bits in realistic channels can be modest. For example, for both 2 and 4 ports at 28 GHz, gains of around 0.15-0.3 dB were observed in UMa. It has also been observed that increasing the size of codebooks and the use of non-constant module elements can provide substantially better gains than increasing the size of the subband in multi-panel UEs.
[0138] [0138] Based on the simulation results presented in this contribution, in some modalities, the subband TPMI may be necessary. The value of X may not be determined by UL MIMO subband precoding gains. Code books with non-constant module can be considered as an alternative to subband TPMI for UL MIMO.
[0139] [0139] The antenna array topology of the UEs is expected to be quite arbitrary in relation to the radiation patterns of antenna elements, polarization properties, antenna element separations and orientation directions. For UE implementations, especially at higher frequencies, it is expected that different antenna arrays within a UE (where each antenna array, for example, a single antenna element or a panel, is assumed to be connected to a baseband port) will have channels with little or no correlation, for example, due to radiation patterns pointing in different directions, great separation between antenna arrangements or orthogonal polarizations. This is not to say that the simple i.i.d. appropriate. Instead, evaluations with channels and realistic models of these various UE configurations are necessary to produce robust code books.
[0140] [0140] Thus, it is desired to create a code books that can work well in a wide variety of EU antenna configurations and channel conditions. DL DFT-based codebooks that are based on a uniform linear arrangement of antenna elements or sub-arrays, with equally spaced antenna elements, may not be sufficient for UEs.
[0141] [0141] It was observed that, to support complete freedom of UE antenna implementation, an NR code books must be designed considering a wide variety of UE antenna configurations and channel conditions.
[0142] [0142] In addition, several optimizations are possible for the design of UL code books. Since both DFT-S-OFDM and CP-OFDM must be supported for the uplink, code books can be designed for both sets of waveforms. Multi-stage or single-stage code books could be supported according to channel conditions and the amount of UL overhead that can be tolerated. The cubic metric that preserves codebooks, or those with non-constant module elements, could be configured to allow for some potential power savings versus exchanges for performance, and so on. Therefore, it may be desirable to start with a simple, robust design as a baseline and add code books one by one after your performance gains, complexity benefits and use cases are established.
[0143] [0143] Optimizations should consider the UL MIMO use cases. The main purpose of several Tx chains in an UE is, in general, SU-MIMO, as it allows a higher peak rate than that which an end user can benefit from. The capacity gains of the system are more likely to be of uplink sectoring and / or MU-MIMO, since gNBs tend to have more (sometimes many more) receiving antennas. It is not possible to define cell coverage based on multiple Tx antennas if multiple Tx antennas is an UE capability and therefore having multiple UE antennas is not an effective way, in general, to increase the range. Therefore, projects must focus on obtaining the greatest “bang for the buck” possible from the DCI bits and using simple schemes.
[0144] [0144] It is noted that a wide variety of codebooks could be designed for CP-OFDM against DFT-S-OFDM, CM preservation against non-constant module, single stage against multi-stage etc. Therefore, it is important to prioritize the design of a robust, simple code books, as a baseline and add other code books according to their gain, complexity and use case.
[0145] [0145] It is still undecided whether 8-port SRS will be supported. As discussed above, the UL MIMO project is driven primarily by the peak rate. NR requires a peak spectral efficiency of 15 bps / Hz on the uplink and this can be achieved with four layers of 64 QAM MIMO, each with a code rate of 5/8. Therefore, there appears to be no need for 8 layers of MIMO or code books to support 8 port SRS at least in a first NR release. It is noted that future compatibility should be considered, so even if Release 15 of the NR does not support 8 layers of MIMO, it may be desirable to have 8 SRS ports and 8 DMRS in Release 15. It was observed that SU-MIMO 4-layer can meet NR peak spectral efficiency requirements of 15 bps / Hz. Release 15 of NR can support a maximum of 4 layers for code books and SU-MIMO transmission.
[0146] [0146] Due to the assumption that, at least in some UE implementations, different antennas in a UE are expected to have low correlation to a dual stage code books (ie, with a W = W1W2 structure, as defined for the LTE downlink) may not be sufficient, as this structure is specifically adapted to separate broadband (and potentially slowly varying) and subband behavior. In addition, a 2-door SRS code books will be just a single step.
[0147] [0147] However, in UE configurations and with a greater number of SRS ports, if the channels demonstrate sufficient correlation, this could be exploited to reduce feedback as done by the dual stage code books. In some embodiments, UL code books may include a double stage structure. It was observed that a single-stage code book structure is probably necessary to deal with low channel correlation. In some embodiments, a multi-stage codebook structure (for example, using W = W1W2 as in DL) can be used to reduce overhead if the channel correlation allows it.
[0148] [0148] Two alternatives to RAN1H88bis have fundamental implications if the TPMI is persistent over time. In Alternative 1, subband TPMIs can be signaled via DCI to the UE only for PRBs allocated for a given PUSCH transmission. In Alternative 2, subband TPMIs can be signaled via DCI to the UE for all PRBs in UL, regardless of the actual AR for a given PUSCH transmission.
[0149] [0149] In Alternative 1, TPMI applies only to a PUSCH transmission. This means that there is no interdependence or accumulation of TPMI between subframes, that is, TPMI is a "single shot". Allowing TPMI to be persistent can be used to reduce overhead, for example, in multi-stage codebooks, where a long-term "W1" is signaled less often than a short-term "W2". Similarly, different TPMIs in different subframes could be applied to different subbands. However, whether or how much overhead can be saved depends on the characteristics of the channel and how many PUSCH transmissions a UE performs.
[0150] [0150] In addition, TPMI applies only to PUSCH, instead of other signals, such as SRS. This is in contrast to Alternative 2, which allows the pre-coded SRS controlled by TPMI. As long as the eNB is aware of the TPM, and has either non-pre-coded DMRS or SRS, the eNB must be able to determine the composite channel after pre-coding and there is no benefit from, for example, estimating interference or perspectives power control. In addition, multiple SRS features can be used to track the beam formation gain of Tx chains. TPMI can control SRS pre-coding. Finally, it is not clear whether Alternative 2 applies outside a portion of the bandwidth. In some modalities, a variation of Alternative 1 from RAN1H88bis is supported for at least broadband TPMI and a single stage code books: TPMI is signaled via DCI to the UE only for PRBs allocated for a given PUSCH transmission.
[0151] [0151] In some embodiments, codebooks can be used for UL transmissions based on codebooks containing only ports combining precoders (ie, there are no port selection precoders, as this can be handled through SRI) in order to minimize the size of the code books and therefore reduce signaling overhead.
[0152] [0152] Since the NR is likely to support only a limited number of ports in a codebook while the number of SRS features will be more flexible, it may be advantageous to use SRI instead of the codebook for port selection. It was observed that the SRI can be used to select UE Tx antenna without increasing the TPMI overhead. In some embodiments, the code books for transmitting UL based on code books must contain only the port that combines pre-encoders.
[0153] [0153] Since antenna patterns, orientations and polarization behaviors vary widely between UEs, it may not be practical to develop models specifically for multi-panel UEs. However, codebook designs that support uncorrelated elements can provide gains in a wide variety of antenna configurations. Therefore, a sufficiently robust single-panel design could be used in the multi-panel case. It has been observed that robust single-panel designs can be used for multi-panel applications. In some embodiments, the UL codebook design targets single panel operation and multi-panel operation can be supported with single panel design.
[0154] [0154] It is natural to transmit different panels in different SRS resources, since the spatial characteristics of elements in panels are likely to be different between the panels. However, it can also be beneficial to transmit simultaneously on several panels to produce a higher rating, a more directive transmission and / or to combine the transmission power from several power amplifiers. Consequently, the ports to which a codebook can be applied must be able to be formed by aggregating SRS resources. When multiple SRIs are indicated, TPMI is applied to all ports on the indicated resources and a code book corresponding to the aggregated resource is used. In some modalities, TPMI can apply to the aggregated SRS resources indicated by multiple SRIS.
[0155] [0155] UL beam management concepts are being developed for the NR in order to control the beam (or, more correctly, the effective antenna pattern) for the respective UE panel. UL beam management is expected to be performed by letting the UE transmit different SRS resources on different UE panel beams, where the TRP performs RSRP measurements and signals back the corresponding SRI (s) (s) to the SRS (s) resource with the highest RSRP value (s). If a multi-panel UE is staggered for transmitting multiple-beam SRS from each of the multiple panels, the TRP and the UE must have a mutual agreement on which combinations of SRS resources can be transmitted simultaneously from the different panels. Otherwise, the TRP could select SRS resources that could not be transmitted simultaneously, such as when the SRS resources correspond to different analog beams switched on a panel. One way to resolve this is to identify groups of SRS resources, in which only one of the resources in an SRS resource group can be transmitted at a time. The single resource from each of the SRS resource groups can be transmitted simultaneously with each of the other SRS resources selected from the other groups. Given the knowledge of the number of SRS groups and which SRS resources are in the groups, TRP can determine which SRS resources it can instruct the UE to transmit when multiple SRIs are signaled.
[0156] [0156] It is noted that the notion of an SRS resource group here serves a purpose similar to the DMRS port groups defined for the downlink in the NR and for the SRS port group. Since an SRI refers to an SRS resource and, since a group of SRS antenna ports appears to imply some selection or subdivision within an SRS resource, "SRS resource group" seems to be more appropriate to describe the intended behavior.
[0157] [0157] In some embodiments, SRS resource groups can be defined, in which a UE can be assumed to be able to transmit only one SRS resource in one SRS resource group at a time and in which one
[0158] [0158] A variety of issues related to UL MIMO codebooks have been explored, including definitions of UL transmission based on codebooks and UL transmission not based on codebooks, the UL MIMO codebook design, the amount of TPMI overhead that may be available to support them, benefit of frequency selective pre-coding, if the TPMI should be persistent, and the number of ports and layers designed for UL SU-MIMO and codebooks. It was observed that: about 10 DCI bits for TPMI, SRI and RI can be used as a starting point for the UL MIMO code books project in NR; and gains from subband TPMI with practical bit numbers on realistic channels can be modest. For example, for both 2 and 4 ports at 28 GHz, average gains in the order of 0.15 to 0.3 dB were observed in UMa.
[0159] [0159] It has also been observed that increasing the size of codebooks and the use of non-constant module elements can provide substantially better gains than increasing the size of the subband in multi-panel UEs. To support complete freedom of UE antenna implementation, an NR code books must be designed considering a wide variety of UE antenna configurations and channel conditions. It is noted that a wide variety of code books could be designed for CP-OFDM against DFT-S-OFDM, CM preservation against non-constant module, single stage against multi-stage etc. It was observed that 4-layer SU-MIMO can meet the peak spectral efficiency requirements of the NR of 15 bps / Hz. A single-stage code book structure is likely to be needed to deal with low channel correlation.
[0160] [0160] It was also noted that the SRI can be used for the selection of Tx antennas in the UE without increasing the overhead of TPMI and robust designs of individual panels can be used for multi-panel applications.
[0161] [0161] In some modalities, for UL transmission based on codebooks, at least one TPMI is signaled back to the UE to determine the precoder for UL transmissions. For UL transmission not based on codebooks, no TPMI can be signaled back to the UE, instead, SRI (s) will be signaled back to the UE to determine the precoder for UL transmissions . The subband TPMI can be used in some cases.
[0162] [0162] In some embodiments, the value of X is not determined by the UL MIMO subband precoding gains. Code books with non-constant module can be considered as an alternative to subband TPMI for UL MIMO.
[0163] [0163] In some modalities, it is possible to prioritize the design of a robust, simple code books, as a baseline and to add other code books according to their gain, complexity and use case. Release 15 of the NR can support a maximum of 4 layers for code books and SUMIMO transmission. A multi-stage code book structure (for example, using W = W1W2 as in DL) could be useful to reduce overhead if the channel correlation allows it.
[0164] [0164] In some modalities, a variation of Alternative 1 from RAN1tH88bis is supported for at least broadband TPMI and a single stage code books: TPMI is signaled via DCI to the UE only for PRBs allocated for a given transmission of PUSCH. Code books for transmission of UL based on code books should contain only the port that combines pre-encoders in some cases.
[0165] [0165] UL codebook design can target single panel operation and multi-panel operation can be supported with single panel design.
[0166] [0166] TPMI can apply to aggregated SRS resources indicated by multiple SRIs. SRS resource groups can be defined, in which a UE can be assumed to be able to transmit only one SRS resource in one SRS resource group at a time and in which a UE can simultaneously transmit an SRS resource from of each of the various SRS resource groups.
[0167] [0167] Figure 16 is a schematic block diagram of a wireless device 50 in accordance with some other embodiments of the present invention. The node includes one or more modules, each of which is implemented in software. The modules provide the functionality of the wireless device according to any of the various UE-related techniques described in the present invention and include a 1602 indication transmitting module to transmit an indication that the UE can transmit several distinct RS resources, in which each RS resource comprises several RS ports and, to transmit an indication of which RS resources the UE can transmit simultaneously. The illustrated wireless device 50 additionally includes a receiver module 1604 for receiving an indication of at least one RS resource and a physical channel transmitting module 1606 for transmitting a physical channel on UE antennas associated with at least one RS resource. indicated.
[0168] [0168] Similarly, figure 17 is a schematic block diagram of a network node according to some other embodiments of the present invention. The node includes one or more modules, each of which is implemented in software. The modules provide the functionality of the network node, according to various modalities, and include an indication module 1702 to receive an indication that the UE can transmit several different RS resources, where each of the RS resources comprises several RS ports and to receive an indication of which RS resources the UE can transmit simultaneously, as well as a selector module 1704 to select at least one RS resource, based on the received indications. The illustrated network node 30 further comprises a transmitter module 1706 to transmit an indication of at least one selected RS resource to the UE and a physical channel receiver module 1708 to receive a physical channel transmitted by the UE on UE antennas associated with the UE. at least one RS resource indicated.
[0169] [0169] Notably, modifications and other modalities of the disclosed invention (s) will come to the mind of someone skilled in the art with the benefit of the teachings presented in the previous descriptions and in the associated drawings. Therefore, it is understood that the invention (s) should not be limited to the specific modalities disclosed and that modifications and other modalities should be included in the scope of this invention. Although specific terms can be used in the present invention, they are used only in a generic and descriptive sense and not for purposes of limitation.
[0170] [0170] The modalities of the techniques and devices disclosed above include, among others, the following examples: (a). One method, in a UF, for transmission in different antenna subsets in the UE, the method comprising: transmitting an indication that the UE can transmit several distinct RS resources in which each of the RS resources comprises several RS ports; transmit an indication of which RS resources the UE can transmit simultaneously; receive an indication of at least one RS resource; transmit a physical channel on UE antennas associated with at least one indicated RS resource.
[0171] [0171] (1). OUE of exemplary modality (k), in which the UE is additionally adapted to transmit layers of MIMO in different subsets of antennas in the UE, in which: the UE is adapted to provide an indication that the UE cannot control the relative phase between the antenna ports corresponding to different RS resources during transmission on the antenna ports; the UE is adapted to receive a plurality of RS resources and a precoder corresponding to each of the plurality of RS resources; and the UE is adapted to transmit the physical channel using the pre-encoders indicated on UE antennas associated with each of the indicated RS resources.
(m). The exemplary UE (k) or (l), in which the UE is additionally adapted to: receive an indication from at least one precoder corresponding to each of the at least one RS resource; and transmitting the physical channel using the pre-encoders indicated on UE antennas associated with the indicated RS resource.
(n). The UE of any of the exemplary modalities from (k) to (m) in which the UE is additionally adapted to adjust the transmitted power of a plurality of RS resources, in which the RS resources are transmitted simultaneously and the power transmitted from each of the RS resources is adjusted by a power control command that is distinct from the power control commands by adjusting the other RS resources.
(O). The UE of any of the exemplary modalities (k) to (n), in which a plurality of RS resources are indicated to the UE, the UE being additionally adapted to transmit the physical channel in a plurality of antenna subsets corresponding to the plurality of indicated RS resources, using a precoder that jointly adjusts the phase of all RS ports comprised within the plurality of indicated RS resources.
(P). A network node of a wireless network adapted to receive transmissions from a UE in different antenna subsets in the UE, where the network node is adapted to: receive an indication that the UE can transmit several different RS resources, where each of the RS resources comprises multiple RS ports; receive an indication of which RS resources the UE can transmit simultaneously; select at least one RS resource, based on the indications received; transmit an indication of at least one selected RS resource to the UE; receiving a physical channel transmitted by the UE on UE antennas associated with at least one indicated RS resource.
(q). The exemplary mode network node (p), in which the network node is adapted to receive layers of MIMO transmitted in subsets of different antennas in the UE, in which the network node is adapted to: receive an indication that the UE it cannot control the relative phase between the antenna ports corresponding to different RS resources during transmission on the antenna ports; and transmitting to the UE a plurality of RS resources and a precoder corresponding to each of the plurality of RS resources; and in which the received physical channel is transmitted by the UE using the precoders indicated on antennas of the UE associated with each one of the indicated RS resources. (r). The exemplary network node (p) or (q), in which the network node is additionally adapted to: receive an indication from at least one precoder corresponding to each of the at least one RS resource; transmit the physical channel using the pre-encoders indicated on UE antennas associated with the indicated RS resource. (s). The network node of any of the exemplary modalities from (p) to (r), in which the network node is additionally adapted to transmit power control commands to the UE for each of a plurality of RS resources of the UE, in which the RS resources are transmitted simultaneously and the transmitted power of each of the RS resources is adjusted by a power control command which is distinct from the power control commands by adjusting the other RS resources. (t). The network node of any of the exemplary modalities from (p) to (s), in which a plurality of RS resources are indicated to the UE, in which the received physical channel is transmitted by the UE in a plurality of corresponding antenna subsets to the plurality of indicated RS resources, using a precoder that jointly adjusts the phase of all the RS ports comprised within the plurality of indicated RS resources. (u). A UE adapted to transmit in subsets of different antennas in the UE, the UE comprising: a transceiver circuit; a processor operationally coupled to the transceiver circuit;
and a memory coupled to the processing circuit, the memory storing instructions for execution by the processor, the processor being configured to control the transceiver circuit to: transmit an indication that the UE can transmit several distinct RS resources, each of which of RS resources comprises several RS ports; transmit an indication of which RS resources the UE can transmit simultaneously; receive an indication of at least one RS resource; transmit a physical channel on UE antennas associated with at least one indicated RS resource.
(v). The exemplary mode UE (u), in which the processor is configured to transmit layers of MIMO in different subsets of antennas in the UE, in which: the processor is configured to transmit an indication that the UE cannot control the relative phase between the antenna ports corresponding to different RS resources during transmission on the antenna ports; the processor is configured to receive a plurality of RS resources and a precoder corresponding to each of the plurality of RS resources; and the processor is configured to transmit the physical channel using the pre-encoders indicated on UE antennas associated with each of the indicated RS resources.
(w). The exemplary UE (u) or (v), in which the processor is configured to: receive an indication from at least one precoder corresponding to each of the at least one RS resource; and transmitting the physical channel using the pre-encoders indicated on UE antennas associated with the indicated RS resource.
(x). The UE of any of the exemplary modalities (u) to (w), in which the processor is configured to adjust the transmitted power of a plurality of RS resources, in which the RS resources are transmitted simultaneously and the power transmitted from each of the RS resources is adjusted by a power control command that is distinct from the power control commands by adjusting the other RS resources.
(y). The UE of any of the exemplary modalities (u) to (x), in which a plurality of RS resources are assigned to the UE, the processor being further configured to transmit the physical channel in a plurality of antenna subsets corresponding to the plurality of indicated RS resources, using a precoder that jointly adjusts the phase of all the RS ports comprised within the plurality of indicated RS resources.
(0) A network node of a wireless network adapted to receive transmissions from a UE on different antenna subsets in the UE, the network node comprising: a transceiver circuit; a processor operationally coupled to the transceiver circuit; and a memory coupled to the processing circuit, the memory storing instructions for execution by the processor, the processor being configured to control the transceiver circuit to: receive an indication that the UE can transmit several distinct RS resources, each of which of RS resources comprises several RS ports; receive an indication of which RS resources the UE can transmit simultaneously; select at least one RS resource, based on the indications received; transmit an indication of at least one selected RS resource to the UE; receiving a physical channel transmitted by the UE on UE antennas associated with at least one indicated RS resource.
(aa). The exemplary mode network node (z), in which the processor is configured to receive layers of MIMO transmitted in different antenna subsets in the UE, in which the processor is configured to: receive an indication that the UE cannot control the relative phase between the antenna ports corresponding to different RS resources during transmission on the antenna ports; and transmitting to the UE a plurality of RS resources and a precoder corresponding to each of the plurality of RS resources; and in which the received physical channel is transmitted by the UE using the precoders indicated on antennas of the UE associated with each one of the indicated RS resources.
(bb). The exemplary network node (z) or (aa), in which the processor is configured to: receive an indication from at least one precoder corresponding to each of the at least one RS resource; transmit the physical channel using the pre-encoders indicated on UE antennas associated with the indicated RS resource.
(cc). The network node of any of the exemplary modalities from (2) to (bb), in which the processor is configured to transmit power control commands to the UE for each of a plurality of RS resources of the
UE, in which the RS resources are transmitted simultaneously and the transmitted power of each of the RS resources is adjusted by a power control command which is distinct from the power control commands by adjusting the other RS resources.
(dd). The network node of any of the exemplary modalities from (7) to (cc), in which a plurality of RS resources are indicated to the UE, in which the received physical channel is transmitted by the UE in a plurality of corresponding antenna subsets to the plurality of indicated RS resources, using a precoder that jointly adjusts the phase of all the RS ports comprised within the plurality of indicated RS resources.
(and is). A UE adapted to transmit in subsets of different antennas in the UE, the UE comprising: an indication transmitting module to transmit an indication that the UE can transmit several different RS resources, where each of the RS resources comprises a series of RS ports and transmit an indication of which RS resources the UE can transmit simultaneously.
a receiver module for receiving an indication from at least one RS resource; and a physical channel transmitter module for transmitting a physical channel on UE antennas associated with at least one indicated RS resource.
(ff). A network node of a wireless network adapted to receive transmissions from a UE on different antenna subsets in the UE, the network node comprising: an indication receiver module to receive an indication that the UE can transmit various RS resources distinct, where each of the RS resources comprises a series of RS ports and receive an indication of which RS resources the UE can transmit simultaneously.
a selector module to select at least one RS resource based on the indications received; a transmitter module for transmitting an indication of at least one selected RS resource to the UE; and a physical channel receiver module for receiving a physical channel transmitted by the UE on antennas of the UE associated with at least one indicated RS resource.

权利要求:
Claims (42)
[1]
1. A method (900), in a user equipment, UE, (50) of transmission in different antenna subsets in the UE (50), the method (900) comprising: transmitting (902) an indication that the UE ( 50) can transmit different reference signal resources, RS, in which each of the RS resources comprises at least one RS port; at least one of: a. transmit capacity information indicating that the UE (50) is capable of simultaneous transmission on multiple RS resources, and b. receiving a first and a second RS configuration, where the first RS configuration is a first list of SRS resources that corresponds at least to the RS resource indications used for PUSCH transmission, and the second RS configuration is a second list of RS resources that can be used for SRS transmission; receive (906) an indication of at least one RS resource; and transmitting (908) a physical channel on UE antennas associated with at least one indicated RS resource.
[2]
The method (900) of claim 1, wherein the capacity information indicates which RS resources the UE (50) can transmit simultaneously.
[3]
The method (900) of claim 1 or 2, wherein the method (900) further comprises transmitting layers of Multiple Inputs Multiple Outputs, MIMO, on different antenna subsets in the UE (50), wherein: the method (900 ) further comprises transmitting an indication that the UE (50) cannot control the relative phase between the antenna ports corresponding to different RS resources while transmitting on the antenna ports;
the step of receiving (906) an indication of at least one RS resource further comprises receiving an indication of a plurality of RS resources; and the transmit step (908) the physical channel comprises transmitting a different MIMO layer associated with each of the indicated RS resources.
[4]
The method (900) of any one of claims 1 to 3, further comprising: receiving an indication from at least one precoder corresponding to each of the at least one RS resource; and transmitting the physical channel using the pre-encoders indicated on UE antennas (50) associated with the indicated RS resource.
[5]
The method (900) of any one of claims 1-4, further comprising adjusting the transmitted power of a PUSCH corresponding to one or more RS resource indicators or adjusting the transmitted power of one or more SRS resources corresponding to the indicators respective RS resource indicators, or both, in which the transmitted power corresponding to each or more RS resource indicators or each of the respective RS resource indicators is adjusted by power control commands that are distinct from control commands of power by adjusting the transmitted power corresponding to others among the one or more RS resource indicators or respective RS resource indicators.
[6]
The method (900) of claim 5, wherein a set of parameters is associated with each RS resource indicator, the method comprising using the set of parameters to determine the transmitted power and in which each set of parameters is distinct from the sets of parameters associated with other RS resource indicators.
[7]
The method (900) of any one of claims 1-6, wherein a plurality of RS resources are assigned to the UE (50), the method (900) further comprising transmitting the physical channel in a plurality of antenna subsets corresponding to the plurality of indicated RS resources, using a precoder that jointly adjusts the phase of all RS ports comprised among the plurality of indicated RS resources.
[8]
8. A method (1100), on a network node (30) of a wireless network, of receiving transmissions from user equipment, UE, (50) on different antenna subsets in the UE (50) method (1100) comprising: receiving an indication that the UE (50) can transmit different reference signal resources, RS, in which each of the RS resources comprises at least one RS port; at least one of: a. receiving capacity information indicating that the UE (50) is capable of simultaneous transmission on multiple RS resources, b. send the UE (50) a first and a second RS configuration, where the first RS configuration is a first list of SRS resources that corresponds at least to the RS resource indications used for PUSCH transmission, and the second configuration RS is a second list of RS resources that can be used for SRS transmission, and c. sending a transmission request to the UE (50), the transmission request being constructed by the network node (30) to avoid instructing the UE (50) to transmit SRS resources that the UE (50) cannot transmit simultaneously; select at least one RS resource, based on the indications received; transmit an indication of at least one selected RS resource to the UE (50); and receiving a physical channel transmitted by the UE (50) on antennas of the UE (50) associated with at least one indicated RS resource.
[9]
The method (1100) of claim 8, wherein the capacity information indicates which RS resources the UE (50) can transmit simultaneously.
[10]
The method (1100) of claim 8 or 9, wherein the method (1100) further comprises receiving layers of MIMO transmitted in different subsets of antennas in the UE (50), wherein: the method (1100) further comprises receiving a indication that the UE (50) cannot control the relative phase between the antenna ports corresponding to different RS resources while transmitting on the antenna ports; the step of transmitting an indication of at least one RS resource comprises transmitting a plurality of RS resources; and the received physical channel is received with a different layer associated with each of the indicated RS resources.
[11]
11.0 the method (1100) of any one of claims 8-10, further comprising: transmitting an indication of at least one precoder corresponding to each of the at least one RS resource; and receiving the transmitted physical channel using the indicated precoders.
[12]
12.0 method (1100) of any one of claims 8-11, further comprising transmitting to the UE (50) power control commands corresponding to each of a plurality of RS resource indicators for the UE (50), of in order to adjust the transmitted power corresponding to each of the RS resource indicators with power control commands that are distinct from the power control commands by adjusting the transmitted power corresponding to other RS resource indicators.
[13]
The method (1100) of any one of claims 8-12, wherein a plurality of RS resources are assigned to the UE (50), the method (1100) further comprising receiving the physical channel transmitted in a plurality of subsets of antennas corresponding to the plurality of indicated RS resources, using a pre-encoder that jointly adjusts the phase of all RS ports comprised among the plurality of indicated RS resources.
[14]
14. A user equipment, UE, (50) adapted to transmit in subsets of different antennas in the UE (50), the UE (50) being adapted to: transmit an indication that the UE (50) can transmit several signal resources reference, RS, distinct, in which each of the RS resources comprises at least one RS port; at least one of: a. transmit capacity information indicating that the UE (50) is capable of simultaneous transmission on multiple RS resources, and b. receiving a first and a second RS configuration, where the first RS configuration is a first list of SRS resources that corresponds at least to the RS resource indications used for PUSCH transmission, and the second RS configuration is a second list of RS resources that can be used for SRS transmission; receive an indication of at least one RS resource; and transmitting a physical channel on UE antennas (50) associated with at least one indicated RS resource.
[15]
The UE (50) of claim 14, wherein the capacity information indicates which RS resources the UE (50) can transmit simultaneously.
[16]
16.0 UE (50) of claim 14 or 15, wherein the UE (50) is additionally adapted to transmit layers of MIMO on different antenna subsets in the UE (50), wherein the UE (50) is adapted to: provide a indication that the UE (50) cannot control the relative phase between the antenna ports corresponding to different RS resources while transmitting on the antenna ports; receive a plurality of SR resources; and transmitting a different MIMO layer associated with each of the indicated RS resources.
[17]
The UE (50) of any one of claims 14 to 16, wherein the UE (50) is further adapted to: receive an indication from at least one precoder corresponding to each of the at least one RS resource; and transmitting the physical channel using the pre-encoders indicated on UE antennas (50) associated with the indicated RS feature.
[18]
The UE (50) of any one of claims 14-17, wherein the UE (50) is additionally adapted to adjust the transmitted power of a PUSCH corresponding to one or more RS resource indicators or to adjust the transmitted power one or more SRS resources corresponding to the respective RS resource indicators, or both, in which the transmitted power corresponding to each of the one or more RS resource indicators or each of the respective RS resource indicators is adjusted by power control commands that are distinct from power control commands by adjusting the transmitted power corresponding to others among the one or more RS resource indicators or respective RS resource indicators.
[19]
19. The UE (50) of claim 18, wherein a set of parameters is associated with each RS resource indicator, wherein the UE (50) is additionally adapted to use the set of parameters to determine the transmitted power and in that each parameter set is distinct from the parameter sets associated with other RS resource indicators.
[20]
20. The UE (50) of any one of claims 14-19, wherein a plurality of RS resources are assigned to the UE (50), the UE (50) being further adapted to transmit the physical channel in a plurality of subsets antenna corresponding to the plurality of indicated RS resources, using a pre-encoder that jointly adjusts the phase of all RS ports comprised within the plurality of indicated RS resources.
[21]
21. A network node (30) of a wireless network adapted to receive transmissions from user equipment, UE, (50) in different antenna subsets in the UE (50), where the network node (30) it is adapted to: receive an indication that the UE (50) can transmit different reference signal resources, RS, in which each of the RS resources comprises at least one RS port; at least one of: a. receiving capacity information indicating that the UE (50) is capable of simultaneous transmission on multiple RS resources, b. send the UE (50) a first and a second RS configuration, where the first RS configuration is a first list of SRS resources that corresponds at least to the RS resource indications used for PUSCH transmission, and the second configuration RS is a second list of RS resources that can be used for SRS transmission, and c. sending a transmission request to the UE (50), the transmission request being constructed by the network node (30) to avoid instructing the UE (50) to transmit SRS resources that the UE (50) cannot transmit simultaneously; select at least one RS resource, based on the indications received; transmit an indication of at least one selected RS resource to the UE (50); and receiving a physical channel transmitted by the UE (50) on antennas of the UE (50) associated with at least one indicated RS resource.
[22]
The network node (30) of claim 21, wherein the capacity information indicates which RS resources the UE (50) can transmit simultaneously.
[23]
The network node (30) of claim 21 or 22, wherein the network node (30) is adapted to receive layers of MIMO transmitted in different subsets of antennas in the UE (50), wherein the network node ( 30) is adapted to: receive an indication that the UE (50) cannot control the relative phase between the antenna ports corresponding to different RS resources while transmitting on the antenna ports; and transmit to the UE (50) a plurality of RS resources; wherein the received channel is received with a different layer associated with each of the indicated RS resources.
[24]
The network node (30) of any one of claims 21-23, wherein the network node (30) is additionally adapted to: transmit an indication from at least one precoder corresponding to each of the at least one RS resource; receive the transmitted physical channel using the indicated precoders.
[25]
The network node (30) of any one of claims 21-24, wherein the network node (30) is additionally adapted to transmit, to the UE (50), power control commands corresponding to each one of a plurality of RS resource indicators for the UE (50), in order to adjust the transmitted power corresponding to each of the RS resource indicators with power control commands that are distinct from the power control commands by adjusting the transmitted power corresponding to other SR resource indicators.
[26]
The network node (30) of any one of claims 21-25, wherein a plurality of RS resources are indicated to the UE (50), wherein the received physical channel is transmitted by the UE (50) in a plurality antenna subsets corresponding to the plurality of indicated RS resources, using a pre-encoder that jointly adjusts the phase of all RS ports comprised among the plurality of indicated RS resources.
[27]
27. A user equipment, UE, (50) adapted to transmit in subsets of different antennas in the UE (50), the UE (50) comprising: a transceiver circuit (56); a processing circuit (52) operably coupled to the transceiver circuit (56); and a memory (64) coupled to the processing circuit (52), the memory (64) storing instructions for execution by the processing circuit (52), whereby the processing circuit (52) is configured to control the transceiver circuit (56) to: transmit an indication that the UE (50) can transmit several different reference signal resources, RS, in which each of the RS resources comprises at least one RS port; at least one of: a. transmit capacity information indicating that the UE (50) is capable of simultaneous transmission on multiple RS resources, and b. receiving a first and a second RS configuration, where the first RS configuration is a first list of SRS resources that corresponds at least to the RS resource indications used for PUSCH transmission, and the second RS configuration is a second list of RS resources that can be used for SRS transmission; receive an indication of at least one RS resource; and transmitting a physical channel on UE antennas (50) associated with at least one indicated RS resource.
[28]
28. The UE (50) of claim 27, wherein the capacity information indicates which RS resources the UE (50) can transmit simultaneously.
[29]
29.0 UE (50) of claim 27 or 28, wherein the processing circuit (52) is configured to transmit layers of MIMO in different antenna subsets in the UE (50), wherein the processing circuit (52) is configured to : transmitting an indication that the UE (50) cannot control the relative phase between the antenna ports corresponding to different RS resources while transmitting on the antenna ports; receive a plurality of SR resources; and transmitting a different MIMO layer associated with each of the indicated RS resources.
[30]
The UE (50) of any of claims 27-29, wherein the processing circuit (52) is configured to: receive an indication from at least one precoder corresponding to each of the at least one RS resource ; and transmitting the physical channel using the pre-encoders indicated on UE antennas (50) associated with the indicated RS feature.
[31]
The UE (50) of any one of claims 27-30, wherein the processing circuit (52) is configured to adjust the transmitted power of a PUSCH corresponding to one or more RS resource indicators or to adjust the power transmitted from one or more SRS resources corresponding to the respective RS resource indicators, or both, where the transmitted power corresponding to each of the one or more RS resource indicators or each of the respective RS resource indicators is adjusted by power control commands that are distinct from power control commands by adjusting the transmitted power corresponding to others among the one or more RS resource indicators or respective RS resource indicators.
[32]
32. The UE (50) of claim 31, wherein a set of parameters is associated with each RS resource indicator, where the processing circuit is further configured to use the set of parameters to determine the transmitted power and at which each parameter set is distinct from the parameter sets associated with other RS resource indicators.
[33]
The UE (50) of any of claims 27-32, wherein a plurality of RS resources are assigned to the UE (50), the processing circuit (52) being further configured to transmit the physical channel in a plurality antenna subsets corresponding to the plurality of indicated RS resources, using a pre-encoder that jointly adjusts the phase of all RS ports comprised among the plurality of indicated RS resources.
[34]
34. A network node (30) of a wireless network adapted to receive transmissions from user equipment, UE, (50) in different antenna subsets in the UE (50), the network node (30) comprising :
a transceiver circuit (36);
a processing circuit (32) operationally coupled to the transceiver circuit (36); and a memory (44) coupled to the processing circuit (32), the memory (44) storing instructions for execution by the processing circuit (32), whereby the processing circuit (52) is configured to control the transceiver circuit (56) for:
receiving an indication that the UE (50) can transmit several different reference signal resources, RS, in which each of the RS resources comprises at least one RS port;
at least one of:
The. receive capacity information indicating that the UE (50) is capable of simultaneous transmission on multiple RS resources,
B. send the UE (50) a first and a second RS configuration, where the first RS configuration is a first list of SRS resources that corresponds at least to the RS resource indications used for PUSCH transmission, and the second configuration RS is a second list of RS resources that can be used for SRS transmission,
ç. sending a transmission request to the UE (50), the transmission request being constructed by the network node (30) to avoid instructing the UE (50) to transmit SRS resources that the UE (50) cannot transmit simultaneously;
select at least one RS resource, based on the indications received; transmit an indication of at least one selected RS resource to the UE (50); and receiving a physical channel transmitted by the UE (50) on antennas of the UE (50) associated with at least one indicated RS resource.
[35]
The network node (30) of claim 34, wherein the capacity information indicates on which RS resources the UE (50) can transmit simultaneously.
[36]
The network node (30) of claim 34 or 35, wherein the processing circuit (32) is configured to receive layers of MIMO transmitted in different antenna subsets in the UE (50), wherein the processing circuit ( 32) is configured to: receive an indication that the UE (50) cannot control the relative phase between the antenna ports corresponding to different RS resources while transmitting on the antenna ports; and transmit to the UE (50) a plurality of RS resources; wherein the received channel is received with a different layer associated with each of the indicated RS resources.
[37]
The network node (30) of any one of claims 34 to 36, wherein the processing circuit (32) is configured to: transmit an indication of at least one precoder corresponding to each of the at least one resource of RS; and receiving the transmitted physical channel using the indicated precoders.
[38]
38. The network node (30) of any one of claims 34-37, wherein the processing circuit (32) is configured to transmit, to the UE (50), power control commands corresponding to each of a plurality of RS resource indicators to the UE (50), in order to adjust the transmitted power corresponding to each of the RS resource indicators with power control commands that are distinct from the power control commands by adjusting the transmitted power corresponding to other SR resource indicators.
[39]
39. The network node (30) of any one of claims 34-38, wherein a plurality of RS resources are indicated to the UE (50), wherein the received physical channel is transmitted by the UE (50) in a plurality antenna subsets corresponding to the plurality of indicated RS resources, using a pre-encoder that jointly adjusts the phase of all RS ports comprised among the plurality of indicated RS resources.
[40]
40. A computer program product comprising program instructions for a processor (52) in user equipment, UE, (50), wherein said program instructions are configured to cause the UE (50) perform a method (900) according to any of claims 1 to 7 when the program instructions are executed by the processor (52).
[41]
41. A computer program product comprising program instructions for a processor (32) on a network node (30), wherein said program instructions are configured to cause the network node (30) to perform a method (1100) according to any one of claims 8 to 13 when program instructions are executed by the processor (32).
[42]
42. A non-transitory computer-readable medium (44, 64) comprising, stored therein, the computer program product of claim 40 or 41.

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---

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---

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---

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---

WO2018231141A1|2018-12-20|

---

CN110741592A|2020-01-31|

---

JP2020523912A|2020-08-06|

---

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引用文献:

---

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

---

---

CN105227284B|2008-09-26|2019-03-22|三星电子株式会社|For receiving and dispatching the method and apparatus of reference signal in a wireless communication system|

---

KR20130032906A|2009-03-17|2013-04-02|인터디지탈 패튼 홀딩스, 인크|Method and apparatus for power control of sounding reference signal transmission|

---

KR101641968B1|2009-09-14|2016-07-29|엘지전자 주식회사|Method and appraturs for transmitting downlink signal in a mimo wireless communication system|

---

EP2343849B1|2010-01-07|2019-05-29|Samsung Electronics Co., Ltd.|Apparatus and method for enhancing features of uplink reference signals|

---

KR101241916B1|2010-02-07|2013-03-11|엘지전자 주식회사|A method for transmitting downlink reference signal in multi-carrier supporting wireless communication system and an apparatus for the same|

---

US8305987B2|2010-02-12|2012-11-06|Research In Motion Limited|Reference signal for a coordinated multi-point network implementation|

---

CN106130708B|2010-04-02|2019-06-28|交互数字专利控股公司|Execute the method and multi-antenna wireless transmitter/receiver unit of SRS transmission|

---

EP2556712B1|2010-04-05|2020-09-09|Nokia Technologies Oy|Channel state information feedback for enhanced downlink multiple input - multiple output operation|

---

IN2014KN01042A|2011-10-20|2015-10-09|Samsung Electronics Co Ltd|

---

CN103138869B|2011-11-22|2015-08-19|中国移动通信集团公司|The sending method of channel state information reference signals, base station and relaying|

---

KR101890419B1|2012-01-16|2018-08-21|삼성전자주식회사|Method and apparatus for transmitting and receiving reference signal|

---

US20150098369A1|2012-05-11|2015-04-09|Optis Wireless Technology, Llc|Reference signal design for special subframe configurations|

---

CN103688586B|2012-05-11|2017-12-22|华为技术有限公司|Reference signal processing method and user equipment, base station|

---

EP2897407A4|2012-09-16|2016-06-15|Lg Electronics Inc|Method and apparatus for transceiving channel status information in wireless communication system supporting cooperative transmission|

---

EP3197070B1|2012-12-27|2019-05-22|Huawei Technologies Co., Ltd.|Method for feeding back channel state information, user equipment, and base station|

---

CN103905104B|2012-12-28|2017-12-19|中兴通讯股份有限公司|It is a kind of according to the multi-antenna sending method and terminal of detection reference signal and base station|

---

US9300451B2|2013-03-13|2016-03-29|Samsung Electronics Co., Ltd.|Transmission of sounding reference signals for adaptively configured TDD communication systems|

---

US9787379B2|2014-11-17|2017-10-10|Samsung Electronics Co., Ltd.|Method and apparatus for precoding channel state information reference signal|

---

CN105991267B|2015-02-06|2019-08-06|电信科学技术研究院|A kind of channel measuring method and device|

---

KR20190090869A|2017-02-14|2019-08-02|엘지전자 주식회사|Method for receiving SRS configuration information and terminal for the same|CN109152035A|2017-06-16|2019-01-04|电信科学技术研究院|A kind of method and device sending Downlink Control Information DCI|

---

US10707939B2|2017-10-03|2020-07-07|Mediatek Inc.|Codebook-based uplink transmission in wireless communications|

---

US11089434B2|2017-09-27|2021-08-10|Lg Electronics Inc.|Method for transmitting and receiving reports for range estimation and communication device therefor|

---

EP3711189A4|2017-11-16|2021-07-07|LenovoLimited|Method and apparatus for mimo transmission|

---

CN110034802B|2018-01-12|2021-08-20|大唐移动通信设备有限公司|Information transmission method and device|

---

WO2020141963A1|2019-01-04|2020-07-09|Samsung Electronics Co., Ltd.|Method and apparatus for signaling multiple resources for message 3transmissions|

---

CN113302987A|2019-01-10|2021-08-24|联想（新加坡）私人有限公司|Uplink power control|

---

CN113273278A|2019-01-11|2021-08-17|联想有限公司|Method and apparatus for enabling panel-specific configuration and transmission|

---

WO2020157040A1|2019-01-28|2020-08-06|Sony Corporation|Multiple antenna panel uplink communication|

---

CN113316950A|2019-02-03|2021-08-27|Oppo广东移动通信有限公司|Signal transmission method, terminal equipment and network equipment|

---

WO2020197357A1|2019-03-28|2020-10-01|엘지전자 주식회사|Method for transmitting and receiving sounding reference signal in wireless communication system and device therefor|

---

CN111757474A|2019-03-28|2020-10-09|中兴通讯股份有限公司|Method and device for sending and scheduling uplink transmission|

---

US11159221B2|2019-04-04|2021-10-26|Qualcomm Incorporated|UE transmission schemes with subband precoding and TPMI re-interpretation|

---

US11251919B2|2019-05-17|2022-02-15|Qualcomm Incorporated|Panel selection for user equipment with multiple panels|

---

WO2021028767A1|2019-08-13|2021-02-18|Nokia Technologies Oy|Panel specific ul power control|

---

WO2021081979A1|2019-11-01|2021-05-06|Qualcomm Incorporated|Uplink subband precoding via sounding reference signals precoded by frequency domain bases|

---

US20210153143A1|2019-11-19|2021-05-20|Qualcomm Incorporated|Signaling and configuration of maximum transmit power using virtual ports|

---

WO2021102788A1|2019-11-28|2021-06-03|Apple Inc.|Apparatus, system, and method for enhanced mobile station power transmission|

---

US20210250943A1|2020-02-06|2021-08-12|Qualcomm Incorporated|Support of multiple srs in the same subframe|

---

CN113271188A|2020-02-14|2021-08-17|大唐移动通信设备有限公司|Data transmission method, terminal and base station|

---

WO2021226884A1|2020-05-13|2021-11-18|Qualcomm Incorporated|Ue indication of coherent uplink transmission|

---

WO2021243674A1|2020-06-05|2021-12-09|Qualcomm Incorporated|Multi-panel power reporting techniques|

---

CN113972938A|2020-07-24|2022-01-25|华为技术有限公司|Communication method and device|

法律状态:
2021-11-03| B350| Update of information on the portal [chapter 15.35 patent gazette]|

优先权:

---

申请号 | 申请日 | 专利标题

---

US201762521028P| true| 2017-06-16|2017-06-16|

---

US62/521,028|2017-06-16|

---

PCT/SE2018/050632|WO2018231141A1|2017-06-16|2018-06-15|Multi-resource uplink sounding and antenna subset transmission|

---