radio link monitoring without permanent reference signals

专利摘要:
wireless communication methods, systems and devices are described. a discontinuous reception periodicity (drx) can be configured to enable monitoring of a reference signal (rs) for rlm procedures. for example, a transmission device can configure a drx periodicity for an rs, where the configured drx periodicity can include a discrete transmission periodicity of rs or a periodicity of a transmission window in which rs is located. therefore, a receiving device can identify the drx frequency and monitor the radio link quality using the rs based on the drx frequency. in some examples, the rs can be transmitted independently of the control channel transmissions and the transmitting device can configure one or more sets of control features for the rs.
公开号:BR112019018730A2
申请号:R112019018730
申请日:2018-03-10
公开日:2020-04-07
发明作者:Lee Heechoon；Binamira Soriaga Joseph；Kiran Mukkavilli Krishna；Gaal Peter；Luo Tao；Chen Wanshi
申请人:Qualcomm Inc；
IPC主号:

专利说明:

RADIO LINK MONITORING WITHOUT PERMANENT REFERENCE SIGNS
CROSS REFERENCES AND PRIORITY CLAIM [0001] The present Patent Application claims priority for the US Interim Patent Application, No. 62 / 470,862 by Lee et alli, entitled Radio Link Monitoring without Permanent Reference Signals, filed at March 13, 2017; and U.S. Patent Application No. 15/917,553 to Lee et alli, entitled Radio Link Monitoring without Permanent Reference Signals, filed March 9, 2018; each of which is granted to the transferee.
INTRODUCTION [0002] The foregoing generally refers to wireless communication and, more specifically, to radio link monitoring (RLM) without permanent reference signals (RSs). Certain modalities enable and provide communication devices, methods, systems and techniques with improved connection reliability and efficient use of energy.
[0003] Wireless communications systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messages, broadcast and so on. These systems may be able to support communication with multiple users by sharing available system resources (such as time, frequency and energy). Examples of such multiple access systems include code division multiple access (CDMA) systems, time division multiple access systems
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2/77 (TDMA), frequency division multiple access systems (FDMA) and orthogonal frequency division multiple access (OFDMA) systems (such as Long Term Evolution (LTE) or a New System) Radio (NR)). A wireless multiple access communications system may include a number of base stations or access network nodes, each simultaneously supporting communication for multiple communication devices, which may otherwise be known as user equipment (UE).
[0004] In some wireless communication systems, receiving devices (such as UEs) can monitor radio link quality to determine synchronicity when communicating with a transmitting device (such as a base station , other UE, etc.) and identify radio link failures. In such cases, the receiving device can use the quality of a permanent transmission of certain RSs to perform radio link quality measurements. However, some systems may not use the permanent transmissions from these RSs, and efficient radio link monitoring techniques may be desirable to ensure robust communications.
SUMMARY [0005] The techniques described refer to improved methods, systems, devices or devices that support RLM without permanent RSs. Generally, the techniques described provide the use of a discontinuous reception periodicity (DRX) to enable monitoring of an RS used for RLM procedures associated with a downlink control channel. Per
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3 / ΊΊ for example, a transmission device (such as a base station) can configure a DRX periodicity for an RS, where the configured DRX periodicity can include a discrete RS transmission periodicity or a window periodicity transmission in which the RS is located (for example, within at least one transmission time interval (TTI) of the respective transmission windows). Therefore, a
reception (like, per example, a HUH ) can identify The periodicity of XRD and monitor The quality in link in radio using the RS based on Frequency in XRD. In
In some examples, the RS can be transmitted independently of the control channel transmissions and the transmission device can configure one or more sets of control features for the RS. Additionally, the receiving device can opportunistically monitor the radio link quality regardless of the configured periodicity of DRX associated with the RS (for example, the receiving device can monitor the radio link quality outside the configured discrete transmissions or transmission windows. ).
[0006] A wireless communication method is described. The method may include identifying a DRX periodicity for an RS for RLM procedures, monitoring based on, at least in part, the RSD's DRX periodicity, a radio link quality and receiving the RS according to the DRX periodicity.
[0007] A device for wireless communication is described. The apparatus may include means for identifying
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4 / ΊΊ a DRX periodicity for an RS for RLM procedures, means to monitor, based, at least in part on the identified DRX periodicity of the RS, a radio link quality and means to receive the RS according to the XRD periodicity.
[0008] Another device for wireless communication is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in memory. The instructions can be executable to make the processor identify a DRX frequency for an RS for RLM procedures, monitor based on, at least in part, the identified RS DRX frequency, a radio link quality and receive the RS according to the frequency of XRD.
[0009] A computer-readable non-transitory medium for wireless communication is described. The computer-readable non-transitory medium may include executable instructions to have a processor identify an XRD periodicity for an RS for RLM procedures, monitor based on, at least in part, the XRD periodicity of the RS, a link quality of radio and receive the RS according to the frequency of XRD.
[0010] Some examples of the computer-readable method, apparatus and non-transitory medium described above may additionally include processes, characteristics, means or instructions for determining a discrete transmission frequency from RS. Some examples of the computer-readable method, apparatus and non-transitory medium described above may additionally include processes, characteristics, means or instructions for monitoring the
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5/77 radio link quality regardless of the frequency of discrete RS transmissions based, at least in part, on a detected RS presence.
[0011] Some examples of the computer-readable method, apparatus and non-transitory medium described above may additionally include processes, characteristics, means or instructions for determining a periodicity of transmission windows to the RS, in which the RS can be received within the respective transmission windows and monitor radio link quality regardless of the frequency of transmission windows based, at least in part, on a detected RS presence.
[0012] In some examples of the method, apparatus and non-transient computer-readable medium described above, each of the respective transmission windows comprises one or more TTIs and the RS can be included within at least one TTI of the one or more TTIs. Some examples of the computer-readable method, apparatus and non-transitory medium described above may additionally include processes, characteristics, means or instructions for receiving an indication of the frequency of XRD or a length of the respective transmission windows, where the indication can be received through radio resource control (RRC) signaling, broadcast signaling of system information or a combination of them.
[0013] Some examples of the computer-readable method, apparatus and non-transitory medium described above may additionally include processes, characteristics, means or instructions for selecting the RS within a
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6 / ΊΊ transmission window specifies for RLM procedures based, at least in part, on one or more signal-to-noise ratios (SNRs) of discrete RS transmissions within the respective transmission windows.
[0014] Some examples of the computer-readable method, apparatus and non-transitory medium described above may additionally include processes, characteristics, means or instructions for selecting the RS within a specific TTI for RLM procedures based, at least in part, in one or more SNRs of discrete RS transmissions within one or more TTIs within the respective transmission windows. In some examples of the method, apparatus and non-transient computer-readable medium described above, the frequency of XRD for RS can be independent of the reception of control channels.
[0015] Some examples of the computer-readable method, apparatus and non-transitory medium described above may additionally include processes, characteristics, means or instructions for identifying one or more sets of control resources associated with the receipt of the RS associated with the RLM procedures . In some examples of the computer-readable method, apparatus and non-transient medium described above, the one or more sets of control resources comprise at least resources associated with a common control channel or resources associated with a specific UE control channel.
[0016] Some examples of the computer-readable method, apparatus and non-transitory medium described above may additionally include processes, characteristics, means or instructions for identifying a first set
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7/77 of control resources associated with RS reception. Some examples of the computer-readable method, apparatus and non-transitory medium described above may additionally include processes, characteristics, means or instructions for identifying a second set of control features associated with RS reception. Some examples of the computer-readable method, apparatus and non-transitory medium described above may additionally include processes, characteristics, means or instructions for using at least the first set of control features, the second set of control features or a combination of these control procedures. RLM.
[0017] Some examples of the computer-readable method, apparatus and non-transitory medium described above may additionally include processes, characteristics, means or instructions for decoding the downlink control channel. Some examples of the computer-readable method, apparatus and non-transitory medium described above may additionally include processes, characteristics, means or instructions for restoring or boosting an RLM counter based, at least in part, on the decoded downlink control channel.
[0018] In some examples of the computer-readable method, apparatus and non-transitory medium described above, boosting the RLM counter comprises: identifying a type of control channel resources or an aggregation level associated with the downlink control channel. Some examples of the computer-readable method, apparatus and non-transitory medium described above may additionally include processes, characteristics, means or
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8/77 instructions for boosting the RLM counter based, at least in part, on the identified type of control channel resources or aggregation level.
[0019] A wireless communication method is described. The method may include identifying an RS for RLM procedures, configuring a DRX periodicity for the RS and transmitting the RS according to the configured DRX periodicity.
[0020] A device for wireless communication is described. The apparatus may include means for identifying an RS for RLM procedures, means for configuring a DRX periodicity for the RS and means for transmitting the RS according to the configured DRX periodicity.
[0021] Another device for wireless communication is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in memory. The instructions can be executable to make the processor identify an RS for RLM procedures, configure a DRX periodicity for the RS and transmit the RS according to the configured DRX periodicity.
[0022] A computer-readable non-transitory medium for wireless communication is described. The computer-readable non-transient medium may include executable instructions to have a processor identify an RS for RLM procedures, configure a DRX periodicity for the RS, and transmit the RS according to the configured DRX periodicity.
[0023] Some examples of the computer-readable method, apparatus and non-transitory medium described above
Petition 870190089416, of 10/09/2019, p. 15/114 °> / ΊΊ may additionally include processes, characteristics, means or instructions for configuring a transmission window periodicity for the RS in which the RS can be transmitted within the respective transmission windows or configure a discrete transmission periodicity of the RS . In some examples of the computer-readable method, apparatus and non-transitory medium described above, each of the respective transmission windows comprises one or more TTIs and the RS can be transmitted within at least one TTI of the one or more TTIs.
[0024] Some examples of the computer-readable method, apparatus and non-transitory medium described above may additionally include processes, characteristics, means or instructions for transmitting an indication of the frequency of XRD or a length of the respective transmission windows, where the indication it can be transmitted via RRC signaling, broadcast signaling of system information or a combination of them. In some examples of the method, apparatus, and non-transient, computer-readable medium described above, the periodicity of XRD to RS may be independent of the control channel transmissions.
[0025] Some examples of the computer-readable method, apparatus and non-transitory medium described above may additionally include processes, characteristics, means or instructions for configuring one or more sets of control features for transmitting the RS associated with the RLM procedures. In some examples of the computer-readable method, apparatus and non-transitory medium described above, the one or more sets of
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10/77 control comprises at least resources associated with a common control channel or resources associated with a specific EU control channel.
BRIEF DESCRIPTION OF THE DRAWINGS [0026] Figure 1 illustrates an example of a system for wireless communication that supports RLM without permanent RSs according to aspects of the present disclosure.
[0027] Figure 2 illustrates an example of a wireless communications system that supports RLM without permanent RSs according to aspects of the present disclosure.
[0028] Figures 3 and 4 illustrate examples of DRX configurations that support RLM without permanent RSs according to aspects of the present disclosure.
[0029] Figure 5 illustrates an example of a process flow in a system that supports RLM without permanent RSs according to aspects of the present disclosure.
[0030] Figures 6 to 8 show block diagrams of a device that supports RLM without permanent RSs according to aspects of the present disclosure.
[0031] Figure 9 illustrates a block diagram of a system that includes a UE that supports RLM without permanent RSs according to aspects of the present disclosure.
[0032] Figures 10 to 12 show block diagrams of a device that supports RLM without permanent RSs according to aspects of the present disclosure.
[0033] Figure 13 illustrates a block diagram of a system that includes a base station that supports RLM without permanent RSs according to aspects of the present disclosure.
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11/77 [0034] Figures 14 to 19 illustrate methods for RLM without permanent RSs according to aspects of the present disclosure.
DETAILED DESCRIPTION [0035] User equipment (UEs) can monitor the quality of downlink radio links to determine if radio link failures occur. For example, in some wireless communication systems, a UE may use a hypothetical control channel block error (BLER) rate (such as a hypothetical physical downlink control channel (PDCCH) BLER) based on a quality of a permanent cell-specific reference signal (CRS) for radio link monitoring (RLM). However, some systems cannot use regular or permanent CRS transmission.
[0036] According described here, the procedures RLM inside of some systems in communications without can use a periodicity configured (like, for example, one guaranteed) of a sign reference (RS ) associated with channels of control in downlink (such as a channel control in physical downlink ( PDCCH), a Advanced PDCCH (ePDCCH) and
similar). For example, a receiving device (such as a UE) can monitor radio link quality at certain intervals based on a discontinuous reception periodicity (XRD) associated with an RS. In such cases, the DRX periodicity may include a discrete periodicity of RS transmissions or it may include a periodicity of a transmission window that includes RS. Therefore, through the use of RS
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12/77 configured, a receiving device can perform RLM in the absence of permanent RSs.
[0037] In some cases, the RS transmission can be independent of the control channel transmissions. In addition, the receiving device can opportunistically monitor the quality of the downlink radio link outside the configured occasions when the receiving device detects the presence of the RS. The RS can also be associated with certain control channel feature sets. For example, RS can be associated with common control channels, EU-specific control channels, or both. Therefore, a receiving device can use different sets of control channel resources for RLM procedures using RS.
[0038] Aspects of the disclosure are initially described in the context of a wireless communications system. Examples are also provided that illustrate the frequency of XRD used to monitor radio link quality. Aspects of the disclosure are further illustrated by, and described with, reference to device diagrams, system diagrams and flowcharts that relate to the RLM without permanent RSs.
[0039] Although aspects and modalities are described in this application with reference to certain examples, those skilled in the art will understand that additional implementations and use cases can arise in many different arrangements and scenarios. The innovations described here can be implemented through different types of platforms, devices, systems,
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13/77 shapes, sizes and packaging arrangements. For example, modalities and / or uses may come about through integrated chip modalities and other non-component-based devices (such as, for example, end-user devices, vehicles, communication devices, computing devices, industrial equipment, buy / sell devices, medical devices, AI-enabled devices, etc.). Although some examples may or may not be specifically targeted to use cases or applications, a wide range of applicability of the innovations described can happen. Implementations may vary from chip-level components or modular components to non-modular implementations, non-chip-level implementations, and / or to aggregates, distributed or OEM devices or systems that incorporate one or more aspects of the described innovations. In some practical configurations, devices that incorporate the described aspects and features may also necessarily include additional components and features for implementing and practicing the claimed and described modalities. For example, wireless signal transmission and reception necessarily includes a number of components for analog and digital purposes (such as hardware components that include one or more antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adder / verifiers, etc.). It is intended that the innovations described here can be practiced on a wide variety of devices, chip-level components,
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14/77 systems, distributed arrangements, end-user devices, etc., of varying sizes, shapes and constitution.
[0040] Figure 1 illustrates an example of a wireless communications system 100 in accordance with various aspects of the present disclosure. The wireless communications system 100 includes base stations 105, UEs 115 and a central network 130. In some instances, the wireless communications system 100 may be a Long Term Evolution (LTE) network, an Advanced LTE (LTE) -A) or a New Radio (NR) network. In some cases, the wireless communications system 100 can support advanced broadband communications, ultra-reliable (ie, mission-critical) communications, low-latency communications, and communications with low-cost, low-complexity devices. The wireless communications system 100 can support the use of configured DRX periodicities to enable efficient RLM procedures that do not depend on a permanent RS.
[0041] Base stations 105 can communicate wirelessly with UEs 115 through one or more base station antennas. Each base station 105 can provide communication coverage for a respective geographic coverage area 110. The communication links 125 shown on the wireless communication system 100 can include uplink transmissions from an UE 115 to a base station 105, or transmissions downlink from a base station 105 to a UE 115. Control and data information can be multiplexed on an uplink or downlink channel according to various techniques. Control and data information can be multiplexed across
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15/77 a downlink channel, for example, using time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques or hybrid TDM-FDM techniques. In some examples, the control information transmitted during a downlink channel TTI can be distributed between different control regions in cascade mode (such as between a common control region and one or more EU-specific control regions ).
[0042] UEs 115 can be dispersed throughout the wireless communication system 100 and each UE 115 can be stationary or mobile. A UE 115 can also be referred to as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device , a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a telephone device, a user agent, a mobile client, a customer or some other suitable terminology. An UE 115 can also be a cell phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a portable device, a tablet, a laptop, a cordless phone, a personal electronic device, a portable device, a personal computer, a wireless local loop station (WLL), an Internet of Things (loT) device, an Internet of Everything (loE) device, an MTC device, an appliance, an automobile, or the like .
[0043] In some cases, an UE 115 can also
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16/77 to be able to communicate directly with other UEs (such as using a peer-to-peer (P2P) or Device-to-Device (D2D) protocol). One or more of a group of UEs 115 using D2D communications can be within the coverage area 110 of a cell. Other UEs 115 in such a group may be outside coverage area 110 of a cell or otherwise unable to receive transmissions from a base station 105. In some cases, groups of UEs 115 communicating via D2D communications may use a one-to-many system (1: M) in which each UE 115 transmits to all other UE 115 in the group. In some cases, a base station 105 makes it easy to program resources for D2D communications. In other cases, D2D communications are ported independently of a base station 105.
[0044] Some UEs 115, such as MTC or loT devices, can be low cost or low complexity devices and can provide automated communication between machines, that is, Machine-Machine (M2M) communication. Ο M2M or MTC can refer to data communication technologies that allow devices to communicate with each other or with a base station without human intervention. For example, ο M2M or MTC can refer to communications from devices that integrate sensors or meters to measure or capture information and relay that information to a central server or application program that can make use of the information or present the information to interacting humans with the program or application. Some UEs 115 can be designed to collect information or
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17/77 provide automated machine behavior. Examples of applications for MTC devices include smart metering, stock monitoring, water level monitoring, equipment monitoring, health care monitoring, wildlife monitoring, weather and geological events, fleet management and tracking, remote security sensing , physical access control and transaction-based business charging.
[0045] In some cases, an MTC device may operate using half-duplex (unidirectional) communications at a reduced peak rate. MTC devices can also be configured to enter hibernation mode when they are not engaged in active communications. In some cases, MTC or ToT devices can be designed to support critical functions and the wireless communication system can be configured to provide ultra-reliable communications for those functions.
[0046] Base stations 105 can communicate with central network 130 and any other. For example, base stations 105 interface with central network 130 via return links 132 (such as, for example, 51, etc.). Base stations 105 can communicate with each other over return links 134 (such as, for example, X2, etc.) either directly or indirectly (such as, via central network 130). Base stations 105 can perform radio configuration and programming for communication with UEs 115 or can operate under the control of a base station controller (not shown). In some
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For example, base stations 105 can be macro-cells, small cells, hot spots or the like. Base stations 105 can also be referred to as eNóBs (eNBs) 105 or gNóBs (gNBs) 105.
[0047] The central network 130 can provide user authentication, access authorization, tracking, IP connectivity and other access, routing or mobility functions. At least some of the network devices, such as a base station 105, can include subcomponents, such as an access network entity, which can be an example of an ANC. Each access network entity can communicate with a number of UEs 115 through one or more access network transmission entities, each of which can be an example of an intelligent radio head or a transmit / receive point (TRP). In some configurations, several functions of each access network entity or base station 105 can be distributed across different network devices (such as radio heads and access network controllers) or consolidated into a single device. network (such as a base station 105).
[0048] Wireless communication system 100 can operate in an ultra high frequency frequency (UHF) region using frequency bands from 700 MHz to 2,600 MHz (2.6 GHz), although in some cases local networks (WLANs) can use frequencies as high as 4 GHz. This region can also be known as a decimetric band, since wavelengths vary from approximately one
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19/77 meter to one meter in length. UHF waves can mainly propagate through the line of sight and can be blocked by buildings and environmental features. However, the waves can penetrate the walls sufficiently to provide services to the UEs 115 located internally. The transmission of UHF waves is characterized by small antennas and short range (such as, for example, less than 100 km) compared to transmission that uses the lowest frequencies (and longest waves) of the high frequency (HF) or very frequency part elevated (VHF). In some cases, the wireless communications system 100 may also use parts of the extremely high frequency (EHF) spectrum (such as, for example, from 30 GHz to 300 GHz). This region can also be known as the millimeter band, since wavelengths vary from approximately one millimeter to one centimeter in length. Thus, EHF antennas can be even smaller and more widely spaced than UHF antennas. In some cases, this may facilitate the use of antenna arrays within an UE 115 (such as, for example, for forming directional beams).
[0049] The wireless communication system 100 can support communications formed by beams or millimeter waves (mmW) between UEs 115 and base stations 105. Devices operating in mmW or EHF bands can have multiple antennas to allow the formation bundles. That is, a base station 105 can use multiple antennas or antenna arrays to conduct beamforming operations for directional communications with an UE 115. Beam formation (which can also be referred to
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20/77 as spatial filtering or directional transmission) is a signal processing technique that can be used on a transmitter (such as a 105 base station) to shape and / or direct a global antenna beam towards a target receiver (such as a UE 115). This can be achieved by combining elements in an antenna array in such a way that signals transmitted at specific angles experience constructive interference while others experience destructive interference.
[0050] Wireless multiple input and multiple output (MIMO) systems use a transmission scheme between a transmitter (such as a 105 base station) and a receiver (such as a UE 115), where both the transmitter and the receiver are equipped with multiple antennas. Some parts of the wireless communication system 100 may use beamforming. For example, base station 105 may have an array of antennas with a number of rows and columns of antenna ports that base station 105 can use for beaming in its communication with UE 115. Signals can be transmitted multiple times in different directions (for example, each transmission can form a different beam formation). An mmW receiver (such as an UE 115) can experience multiple beams (such as antenna sub-arrays) while receiving synchronization signals.
[0051] In some cases, the antennas of a 105 or UE 115 base station may be located within one or more antenna arrays, which can support the
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21/77 beam forming operation or MIMO. One or more base station antennas or antenna arrays can be placed in an antenna array, such as an antenna tower. In some cases, the antennas or antenna arrays associated with a base station 105 may be located in several geographic locations. A base station 105 can use multiple antennas or antenna sets to conduct beamforming operations for directional communications with an UE 115.
[0052] In some cases, wireless communication system 100 may be a packet-based network that operates according to a layered protocol stack. At the user level, carrier communications or the Packet Data Convergence Protocol (PDCP) layer can be IP based. A Radio Link Control (RLC) layer can, in some cases, segment and bundle packets to communicate through logical channels. A Media Access Control (MAC) layer can perform priority handling and multiplex logical channels in transport channels. The MAC layer can also use HARQ to provide relay on the MAC layer to improve the efficiency of the link. In the control plane, the Radio Resource Control (RRC) protocol layer can provide for the establishment, configuration and maintenance of an RRC connection between a UE 115 and a network device or central network 130, which supports radio carriers for user plan data. In the Physical layer (PHY), transport channels can be mapped to physical channels.
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22/77 [0053] Time intervals in LTE or NR can be expressed in multiples of a basic time unit (which can be a sampling period of T _s = 1 / 30,720,000 seconds). Time resources can be organized according to 10 msec radio frames (T _f = 307200T _s ), which can be identified by a number of system frames (SFN) ranging from 0 to 1023. Each frame can include ten 1 msec subframes numbered from 0 to 9. A subframe can be further divided into two 0.5 msec partitions, each of which contains 6 or 7 periods of modulation symbols (depending on the length of the prefix cyclic prefixed in each symbol). Excluding the cyclic prefix, each symbol contains 2048 sample periods. In some cases, the subframe may be the smallest programming unit, also known as a TTI. In other cases, as discussed above, a TTI may be shorter than a subframe (such as, for example, an sTTI) or may be selected dynamically (such as, for example, in short TTI jets or on selected component carriers that use Short TTIs).
[0054] A resource element can consist of a period of symbols and a subcarrier (such as a frequency range of 15 kilohertz (kHz)). A resource block can contain 12 consecutive subcarriers in the frequency domain and, for a normal cyclic prefix in each orthogonal frequency division multiplexing (OFDM) symbol, 7 consecutive time domain OFDM symbols (1 partition) or 84 elements of resources. The number of bits carried by each
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23/77 resource element may depend on the modulation scheme (the configuration of the symbols that can be selected during each symbol period). Thus, the more resource blocks that an UE 115 receives and the higher the modulation scheme, the higher the data rate.
[0055] The wireless communications system 100 can support operation on multiple cells or carriers, a feature that can be referred to as carrier aggregation (CA) or multiple carrier operation. A carrier can also be referred to as a component carrier (CC), a layer, a channel, etc. The terms carrier, component carrier, cell and channel can be used interchangeably here. A UE 115 can be configured with multiple downlink CCs and one or more uplink CCs for carrier aggregation. Carrier aggregation can be used by both carriers with frequency division duplexing (FDD) and time division duplexing (TDD).
[0056] In some cases, the wireless communications system 100 may use advanced component carriers (eCCs). An eCC can be characterized by one or more characteristics, which include: higher bandwidth, shorter symbol duration, shorter TTIs and modified control channel configuration. In some cases, an eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (such as, for example, when multiple server cells have a non-optimal or sub-optimal return link). An eCC can also be
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24/77 configured for use in unlicensed spectrum or shared spectrum (where more than one operator is allowed to use the spectrum). An eCC characterized by wide bandwidth can include one or more segments that can be used by UEs 115 that are not able to monitor all bandwidth or prefer to use limited bandwidth (as, for example, to save energy) .
[0057] In some cases, an eCC may use a different symbol duration than other CCs, which may include the use of a reduced symbol duration compared to the symbol durations of the other CCs. A shorter symbol life may be associated with increased sub carrier spacing. A TTI in an eCC can consist of one or multiple symbols. In some cases, the duration of TTI (that is, the number of symbols in a TTI) can be variable. In some cases, an eCC may use a different symbol duration than other CCs, which may include the use of a reduced symbol duration when compared to the symbol durations of the other CCs. A shorter symbol life is associated with increased sub carrier spacing. A device, such as a UE 115 or base station 105 that uses eCCs, can transmit broadband signals (such as 20, 40, 60, 80 MHz, etc.) at reduced symbol durations (such as, for example , 16.67 microseconds (ps)). An eCC TTI can consist of one or more symbols. In some cases, the duration of TTI (that is, the number of symbols in a TTI) can be variable.
[0058] In the wireless communication system 100,
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25/77, an UE 115 can be expected to monitor radio link quality to determine whether communications with another wireless device (such as a base station 105, another UE 115, etc.) are synchronized (such as, for example, in sync) or out of sync (for example, out of sync), where the latter case can lead to a radio link failure and a dropped communications session if the link quality does not improve. In determining whether the UE 115 is in sync or out of sync with another wireless device, the UE 115 can use a series of RLM counters and timers. For example, an N310 counter can define the number of intervals over which the UE 115 is disabled to decode a control channel. The N310 counter can be used to start a T310 timer during which the UE 115 determines whether it can resynchronize with the wireless device. In addition, an N311 counter can define the number of intervals that the UE 115 must decode on a control channel before it is determined to be in sync with the wireless device again. As an illustrative example, when receiving consecutive out-of-sync N310 indications for upper layers, a UE 115 can start the T310 timer and after the T310 timer expiration cable, a radio link failure can be declared. However, if consecutive indications are received in N311 synchronization for upper layers, while timer T310 is running, UE 115 can stop timer T310. In some cases, each out-of-sync and in-sync indication can be a certain duration (such as
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26/77 example, 10 msec) separately. That is, the UE 115 can determine, every 10 msec, whether it is in sync or out of sync when communicating with other wireless devices.
[0059] In some cases, an UE 115 can continuously monitor a wireless link 125 for an indication that the UE 115 can receive data. In other cases (such as, for example, to conserve energy and extend battery life), an UE 115 can be configured with an XRD cycle. A DRX cycle consists of a On Duration when the UE 115 can monitor control information (such as, for example, about the PDCCH) and a DRX period when the UE 115 can turn off radio components. In some cases, an UE 115 can be configured with a short XRD cycle and a long XRD cycle. In some cases, an UE 115 may enter a long XRD cycle if the UE 115 is inactive for one or more short XRD cycles. The transition between the short DRX cycle, the long DRX cycle and continuous reception can be controlled by an internal timer or by messages from a base station 105. A UE 115 can receive programming messages on the PDCCH during the On Duration . Additionally, the UE 115 can be configured with DRX periodicity, which allows monitoring RSs at discrete times or within transmission windows.
[0060] The wireless communication system 100 can support the use of a DRX periodicity to allow monitoring of an RS (such as, for example, associated with a downlink control channel) used for RLM procedures. For example, a base station
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105 can configure a DRX periodicity for an RS, where the configured DRX periodicity can include a discrete transmission periodicity of the RS or a periodicity of a transmission window in which the RS is located (as, for example, within at least a TTI of the respective transmission windows). Therefore, a UE 115 can identify the frequency of XRD and monitor radio link quality using the RS based on the frequency of XRD. In some examples, the RS can be transmitted independently of the control channel transmissions and the base station 105 can configure one or more sets of control features for the RS. In addition, the UE 115 can opportunistically monitor radio link quality regardless of the configured periodicity of XRD associated with RS (such as, for example, the receiving device can monitor radio link quality outside configured configured discrete transmissions or windows. streaming).
[0061] Figure 2 illustrates an example of a wireless communications system 200 that supports RLM without permanent RSs according to various aspects of the present disclosure. The wireless communication system 200 includes an UE 115-a and a base station 105-a, which can be examples of the corresponding devices, as described with reference to Figure 1. The wireless communication system 200 can be an example of a system which does not use a permanent RS (such as a CRS), but uses an RS configured for downlink control channels that enables an UE 115 to perform RLM procedures.
[0062] For example, the RLM within the system of
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28/77 wireless communications 200 can use a configured periodicity (or guaranteed) of an RS 210 for downlink control channels. In such cases, the UE 115-a can monitor the quality of the downlink radio link, at certain intervals, based on a DRX frequency associated with an RS 210 for a downlink control channel. The DRX periodicity may include a discrete periodicity for RS 210 transmissions. In some cases, the UE 115-a may opportunistically monitor the quality of the downlink radio link outside or regardless of the configured occasions (such as, for example, the discrete periodicity ) when the UE 115-a detects a presence of the RS 210. In some examples, the RS 210 may include a CRS, a channel status information RS (RS CSI), a burst of synchronization signal (SSB), a demodulation reference signal (DMRS) or other types of RSs.
[0063] In addition or alternatively, RS 210 can be transmitted within a certain window. That is, the DRX periodicity can include a transmission window periodicity for the RS 210 and the UE 115-a can monitor transmissions from the RS 210 during the transmission window for RLM purposes. Transmitting the RS 210 within at least one TTI (such as a partition) in the transmission window can allow fluctuations in RS 210 transmission times, and can enable programming flexibility for the base station 105-a. Therefore, the UE 115-a can monitor the downlink radio link quality of the RS (s) 210 within the configured transmission window. In such cases, the UE 115-a can
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29/77 determine signal-to-noise ratios (SNRs) of RSs within respective transmission windows and select an RS in a specific transmission window for use in RLM procedures based on SNRs. In some cases, the UE 115-a may select the RS with a high SNR (such as an RS that has a higher quality) in relation to the SNRs of other RSs. Additionally or alternatively, the UE 115-a can opportunistically take (for example, measure) any SNRs from RSs from other partitions within a window when the UE 115-a detects the presence of the RS 210. In some examples, the UE 115a can monitor the quality of the downlink radio link outside the configured transmission window when the UE 115-a detects the presence of the RS 210.
[0064] Base station 105-b can indicate the DRX periodicity for UE 115-a using RRC signaling or it can transmit the DRX periodicity using a system information broadcast. In some cases, such as when the periodicity of XRD comprises a transmission window, the indication may include a size, duration or length of the transmission window. As a result, the UE 115-a can determine the window periodicity and the window length to assist the UE 115-a in monitoring RSs 210.
[0065] The use of RS 210 inside a window can enable the base station 105-to transmit RS 210 regardless of the presence of a control channel inside the window, at least for a single partition according to the periodicities of the configured window about the configured features. In some cases, if the UE 115-a does not
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30/77 detecting any presence of the RS 210 within a transmission window (as, for example, because of a low RS SNR), the UE 115-a can select the RS with the highest SNR within a transmission window for use for RLM procedures.
[0066] In some cases, the RS 210 may be associated with certain sets of control channel resources. For example, RS can be associated with common control channels, EU-specific control channels, group-specific control channels or a combination of them. That is, the base station 105-a can configure more than one set of control features for RLM purposes for the UE 115-a. Therefore, base station 105-a can configure which sets of control features provide RS 210. In such cases, base station 105-a can transmit RS 210 independently of a control channel (such as a control channel may not be present in the DRX periodicity when RS 210 is transmitted), which may be in accordance with the periodicities configured on the configured resources. The configured periodicity of DRX can enable the elimination of ambiguities between RSs with a low SNR and silent RSs in UE 115-a.
[0067] In some cases, base station 105-a may configure more than one set of control channel resources for the purpose of RLM. The UE 115-a can therefore use a set of control features (such as a set of control features that includes a common primary PDCCH) as an initially standardized set for an SNR measurement. Additional
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31/77 or alternatively, the UE 115-a can optionally use other sets of control features for SNR measurements, although the measurement accuracy cannot be worse than that used from the initially standardized feature set. In some cases, the UE 115-a can use all of the control feature sets configured for measurements, using either a combined SNR or a maximum SNR out of all of the sets for the RLM.
[0068] When decoding a downlink control channel, the UE 115-a can use different techniques to manage RLM counters and timers. For example, after successful decoding of the downlink control channel, the UE 115-a can restore a first RLM counter (such as an N310 counter). Additionally or alternatively, the UE 115-a can boost a second RLM counter (such as, for example, an N311 counter), where boosting the counter can include increasing an amount by which the counter is increased (such as, for example , for a given boost factor). For example, where counter N311 can initially increase by one, counter N311 can increase by five after being boosted. In some cases, different control channels (such as EU-specific control channels and common control channels) may have different boost factors associated with them, where, for example, the decoding of a specific EU control channel it may be associated with a boost factor greater than the decoding of a common control channel. Additionally or alternatively, the aggregation level information of a decoded downlink control channel
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32/77 can also be reflected in the boost factor (as, for example, a lower aggregation level can have a higher boost factor).
[0069] In some cases, the wireless communications system 200 may use an indication that signals single-beam or multiple-beam communications within the system. For example, base station 105-a can transmit a multi-beam indication to UE 115a which signals that communications within wireless communication system 200 use multiple directional beams (not shown). Alternatively, a single beam indication can be transmitted to UE 115-a which signals an implementation that uses single beam transmissions. In some cases, the indication can be sent using different signaling schemes, such as through synchronization signals (as, for example, included in an SSB), a master information block (MIB), a system information block ( SIB), an RRC configuration or the like. Therefore, the use of RS 210 for RLM procedures described here can be implemented in single beam and multiple beam implementations.
[0070] Figure 3 illustrates an example of a DRX 300 configuration that supports RLM without permanent RSs according to various aspects of the present disclosure. The DRX 300 configuration illustrates an example of a DRX periodicity for discrete transmissions from an RS to a downlink control channel for RLM procedures.
[0071] The DRX 300 configuration can include
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33/77 a periodicity of DRX 305 that includes a duration of DRX On and a duration of DRX Off. The DRX 305 periodicity can be configured by a transmitting device (such as a base station 105) such that a receiving device (such as a UE 115) can wake up during a duration of ON DRX to monitor transmissions from an RS 310 to a downlink control channel (such as, for example, which includes at least one first RS 310-a for a downlink control channel, a second RS 310-b for a downlink control channel and so on) for RLM procedures. The DRX 300 configuration can support a discrete transmission frequency of RS 310, which a UE 115 can use to monitor radio link quality (as, for example, in a system that does not use permanent transmissions from a CRS). As a result, each duration of Linked DRX within the DRX periodicity can provide the UE 115 with a configured (or guaranteed) time during which the RS 310 is transmitted, and the UE 115 can make quality measurements of the RS 310. For example, the UE 115 can measure an RS 310 SNR, an RS310 signal-to-interference plus noise ratio (SINR), or an RS 310 bit error rate to determine the quality of RS 310. In some examples, a UE can perform RLM procedures using a hypothetical downlink control channel (such as, based on a quality or SNR of an RS associated with a hypothetical PDCCH).
[0072] In some cases, each streaming in RSs 310 can if r independent of the presence of a channel in control Per example, the transmission of a channel in
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3 ^ / ΊΊ control may not coincide with, or happen at, a different time than the transmission of RSs 310. In addition, a base station 105 can configure control channel resource sets (such as resource blocks ), which can be associated with common control channels and / or EU-specific control channels. The transmission of discrete RS 310, according to the DRX 305 periodicity, can circumvent the ambiguity in different received RSs 310, such as an RS 310 which has a low SNR and mute RSs 310.
[0073] An UE 115 can monitor downlink radio link quality outside the configured occasions when the UE 115 detects the presence of the RS 310. As an example, the UE 115 can opportunistically monitor the radio link quality in instances or before or after the transmission of an RS 310 to a downlink control channel.
[0074] Figure 4 illustrates an example of a DRX 400 configuration that supports RLM without permanent RSs according to various aspects of the present disclosure. The DRX 400 configuration illustrates an example of a DRX periodicity for transmission windows, where the respective transmission windows include a transmission from an RS to a downlink control channel and used for RLM procedures.
[0075] The DRX 400 configuration can include a DRX 405 periodicity that includes a DRX On duration and a DRX Off duration. The DRX 405 frequency can be configured by a transmission device (such as a base station 105) such as
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35/77 that a receiving device (such as a UE 115) can wake up for a duration of On DRX to monitor transmissions from an RS 410 to a downlink control channel (for example, that includes at least one first RS 410-a, a second RS 410-b and so on). The DRX 400 configuration can support a transmission window periodicity setting 415, where each transmission window 415 can include a respective RS 410 transmission that a UE 115 can use to monitor radio link quality (such as example, on a system that does not use permanent transmissions from a CRS). For example, a first transmission window 415-a can include the first RS 410-a, which can be included in at least one TTI (such as, for example, partition) of the first transmission window 415-a. Likewise, a second transmission window 415-b can include the second RS 410-b for at least one TTI, and so on.
[0076] Therefore, each duration of Linked DRX within the DRX 405 periodicity can provide the UE 115 with a configured (or guaranteed) window during which an RS 410 is transmitted to a downlink control channel. In some cases, the UE 115 may take a higher SNR within a 415 transmission window for RLM procedures. Additionally or alternatively, the UE 115 can take SNRs from other TTIs within the transmission window 415 when the presence of RS 410 is detected. The use of the transmission windows 415 can enable the transmission fluctuation of the RS 410, which can provide programming flexibility for the transmitter.
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36 / ΊΊ [0077] In addition or alternatively, an UE 115 can monitor the quality of downlink radio links outside the 415 broadcast windows configured when the UE 115 detects the presence of the RS 410. As an example, the UE 115 can monitor opportunistically the radio link quality in instances or before or after transmission windows 415. In some cases, RS 410 within a transmission window 415 can be transmitted regardless of the presence of a control channel.
[0078] Figure 5 illustrates an example of a process flow 500 in a system that supports RLM without permanent RSs according to various aspects of the present disclosure. Process flow 500 includes a UE 115-b and a base station 105-b, which can be examples of the corresponding devices, as described with reference to Figures 1 and 2. Process flow 500 illustrates an example of using an RS for downlink control channels,
where RS is used for procedures of RLM in one system that doesn't includes transmissions one Permanent RS (such as a CRS) •[0079] In 505, base station 105-b can identify one LOL what Can be associated with procedures RLM. 0 RS Can be ass idle with one control channel downlink (how put example, PDCCH or
ePDCCH). At 505, base station 105-b can configure a DRX periodicity for the RS. In some cases, configuring the DRX periodicity for the RS may include configuring a discrete transmission periodicity of the RS. Additionally or alternatively, configuring the DRX periodicity for RS may include configuring a
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37/77 periodicity of transmission windows to the RS, in which the RS is transmitted within the respective transmission windows. In such cases, at least one TTI within the respective transmission windows can include the RS.
[0080] In some cases, the frequency of DRX to RS can be independent of the control channel transmissions from the base station 105-b. At 510, base station 105-b can also configure one or more sets of control features associated with transmitting the RS associated with the RLM procedures. In such cases, sets of control resources may include resources associated with a common control channel or resources associated with a specific UE control channel.
[0081] At 515, base station 105-b can transmit, and UE 115-b can receive, an indication of the DRX configuration. That is, the base station 105-b can signal the configured DRX frequency to the RS 115-b. In some cases, the indication can be transmitted using RRC signaling, system information broadcast signaling or a combination of them. In some examples, the base station 105-b can transmit an indication of a length of the respective transmission windows.
[0082] In 520, UE 115-b can identify the periodicity of XRD for RS associated with RLM procedures. For example, identifying the DRX frequency for the RS may include determining a discrete transmission frequency for the RS. Additionally or alternatively, identify the frequency of XRD for the
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RS may include determining a transmission window periodicity for the RS, where the RS is received within the respective transmission windows. In such cases, the UE 115-b can use a higher SNR within its transmission windows for RLM procedures, or it can use an SNR associated with one or more TTIs (such as a partition) within its respective transmission windows for RLM procedures.
[0083] At 520, UE 115-b can identify one or more sets of control resources associated with the receipt of the RS associated with the RLM procedures. In some cases, the UE 115-b can identify a first set of control features, identify a second set of control features associated with receiving RS and use at least the first set of control features, the second set of features control panel or a combination of them for RLM procedures. For example, UE 115-b can select the first set of control features as an initially standardized set (which can correspond to a set of control features associated with a common primary PDCCH). The UE 115-b can optionally use the second set of control features (or other sets of control features) for quality measurements of radio links in cases where the accuracy of measurements in the second set of control features is not worse measurements in the first set of control features.
[0084] In 525, UE 115-b can monitor radio link quality based, at least in part, on the identified frequency of XRD. In some instances, the
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UE 115-b can detect the presence of the RS and monitor the quality of the radio link regardless of the frequency of the discrete transmissions. In other cases, the UE 115-b can monitor the quality of the radio link regardless of the periodicity of the transmission windows based on the detected presence of the RS.
[0085] At 530, the base station 105-b can transmit, and the UE 115-b can receive, the RS according to the DRX periodicity. At 535, the base station can transmit a downlink control channel to the UE 115b. By decoding the downlink control channel, the UE 115-b can restore and / or boost an RLM counter based on the control channel decoding. For example, at 540, the UE 115-b can decode the control channel and restore an N310 counter. Additionally or alternatively, the UE 115-b can decode the control channel and boost an N311 counter by 540. In some cases, boosting the N311 counter (such as, according to a boost factor) can be based on a control channel resource type associated with the control channel, or can be based on an aggregation level of the control channel.
[0086] Figure 6 shows a block diagram 600 of a wireless device 605 that supports RLM without permanent RSs according to aspects of the present disclosure. The wireless device 605 can be an example of aspects of a receiving device, such as a UE 115, as described with reference to Figure 1. The wireless device 605 can include the receiver 610, the UE RLM manager 615 and the transmitter 620. The wireless device 605 can
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40/77 also include a processor. Each of these components can be in communication with each other (for example, through one or more buses).
[0087] The receiver 610 can receive information, such as packages, user data or control information associated with various information channels (such as, for example, control channels, data channels and information related to RLM without permanent RSs, etc.). The information can be passed on to other components of the device. The receiver 610 can be an example of aspects of transceiver 935 described with reference to Figure 9. The receiver 610 can use a single antenna or a set of antennas.
[0088] The EU 615 RLM manager can be an example of aspects of the EU 915 RLM manager described with reference to Figure 9. The EU 615 RLM manager and / or at least some of its various subcomponents can be implemented in hardware, software run by a processor, firmware or any combination thereof. If implemented in software run by a processor, the functions of the EU 615 RLM manager and / or at least some of its various subcomponents can be performed by a general purpose processor, a digital signal processor (DSP), an integrated circuit application-specific (ASIC), a field programmable port arrangement (ERGA) or other programmable logic device, discrete or transistor gate logic, discrete hardware components or any combination of these designed to perform the functions described in this disclosure.
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41/77 [0089] The EU 615 RLM manager and / or at least some of its various subcomponents can be physically located in different positions, including being distributed so that parts of functions are implemented in different physical locations by one or more physical devices. In some instances, the EU 615 RLM manager and / or at least some of its various subcomponents may be a separate and distinct component according to different aspects of the present disclosure. In other examples, the EU 615 RLM manager and / or at least some of its various subcomponents can be combined with one or more other hardware components, which include, but are not limited to, an input / output component (I / O), a transceiver, a server network, another computing device, one or more other components described in the present disclosure or a combination thereof according to various aspects of the present disclosure.
[0090] The EU 615 RLM manager can identify a DRX periodicity for an RS for a downlink control channel, where the RS can be associated with RLM procedures, monitor a radio link quality based on the identified periodicity DRX and receive the RS according to the DRX frequency.
[0091] The transmitter 620 can transmit signals generated by other components of the device. In
some examples, the transmitter 620 can be • placed with one 610 receiver in a module in transceiver. For example, O transmitter 620 Can be An example of aspects of transceiver 935 described with reference to Figure 9. 0
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42/77 transmitter 620 can use a single antenna or a set of antennas.
[0092] Figure 7 shows a block diagram 700 of a wireless device 705 that supports RLM without permanent RSs according to aspects of the present disclosure. The wireless device 705 may be an example of aspects of a wireless device 605 or an UE 115, as described with reference to Figures 1 and 6. The wireless device 705 may include the receiver 710, the UE RLM manager. 715 and transmitter 720. The wireless device 705 may also include a processor. Each of these components can be in communication with each other (for example, through one or more buses).
[0093] The receiver 710 can receive information such as packages, user data or control information associated with various information channels (such as, for example, control channels, data channels and information related to RLM without permanent RSs, etc. .). The information can be passed on to other components of the device. Receiver 710 can be an example of aspects of transceiver 935 described with reference to Figure 9. Receiver 710 can use a single antenna or set of antennas. The UE 715 RLM manager can be an example of aspects of the UE 915 RLM manager described with reference to Figure 9. The UE 715 RLM manager can also include the DRX 725 periodicity manager, the monitoring component of radio link 730 and the RS 735 manager.
[0094] The DRX periodicity manager
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725 can identify a DRX periodicity for an RS for a downlink control channel, where the RS can be associated with RLM procedures. In some cases, identifying the frequency of XRD for RS includes determining a periodicity of discrete transmissions from RS. In addition or alternatively, identifying the DRX frequency for the RS includes determining the periodicity of the transmission windows for the RS, where the RS is received within the respective transmission windows. In some cases, at least one TTI within the respective transmission windows includes the RS. In some cases, the frequency of XRD for RS is independent of the reception of the control channels.
[0095] In some cases, the DRX 725 periodicity manager may receive an indication of a length of the respective transmission windows, where the indication is received through RRC signaling, broadcast signaling of system information or a combination of them. In addition, the DRX periodicity manager 725 can receive an indication of the DRX periodicity, in which the indication is also received through RRC signaling, system information broadcast signaling or a combination of them.
[0096] The radio link monitoring component 730 can monitor a radio link quality based on the identified frequency of XRD. In some cases, the radio link monitoring component 730 can monitor radio link quality regardless of the frequency of discrete transmissions based on the detected presence of the RS. Additional
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44/77 or alternatively, the radio link monitoring component 730 can monitor the quality of the radio link regardless of the periodicity of the transmission windows based on the detected presence of the RS. In such cases, the radio link monitoring component 730 may use a higher SNR within its transmission windows for the RLM procedures or use an SNR associated with one or more TTIs within the respective transmission windows for the transmission procedures. RLM or a combination of them.
[0097] In some examples, the radio link monitoring component 730 may use at least a first set of control features, a second set of control features, or a combination of them for RLM procedures. The RS 735 manager can receive the RS according to the DRX frequency and detect the presence of the RS.
[0098] The transmitter 720 can transmit signals generated by other components of the device. In some examples, transmitter 720 can be placed with a receiver 710 in a transceiver module. For example, transmitter 720 can be an example of aspects of transceiver 935 described with reference to Figure 9. Transmitter 720 can use a single antenna or a set of antennas.
[0099] Figure 8 shows a block diagram 800 of a UE 815 RLM manager that supports RLM without permanent RSs according to aspects of the present disclosure. The EU 815 RLM manager can be an example of aspects of an EU 615 RLM manager, a
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45/77 UE 715 RLM manager, or EU 915 RLM manager described with reference to Figures 6, 7 and 9. The EU 815 RLM manager may include the DRX periodicity manager 820, the monitoring component radio link 825, the RS 830 manager, the 835 control feature set component, the 840 decoder and the RLM counter manager 845. Each of these modules can communicate, directly or indirectly, with each other (such as, for example, through one or more buses).
[0100] The DRX periodicity manager 820 can identify a DRX periodicity for an RS for a downlink control channel, where the RS can be
associated with procedures in RLM. In some cases, identify The Frequency in XRD for RS includes to determine an Frequency in discrete transmissions from the
LOL. In addition or alternatively, identifying the DRX frequency for the RS includes determining the periodicity of the transmission windows for the RS, where the RS is received within the respective transmission windows. In some cases, at least one TTI within the respective transmission windows includes the RS. For example, each of the respective transmission windows can be composed of one or more TTIs (such as, for example, partitions), and the RS can be transmitted by a base station 105 within at least one of the partitions. In some cases, the frequency of XRD for RS is independent of the reception of the control channels.
[0101] In some cases, the DRX 820 periodicity manager may receive an indication of a
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46 / ΊΊ length of the respective transmission windows, where the indication is received through RRC signaling, system information broadcast signaling or a combination of them. In addition, the DRX periodicity manager 820 can receive an indication of the DRX periodicity, where the indication is also received through RRC signaling, system information broadcast signaling or a combination of them.
[0102] The radio link monitoring component 825 can monitor a radio link quality based on the identified frequency of DRX and monitor the radio link quality regardless of the frequency of discrete transmissions based on the detected presence of RS. In some instances, the radio link monitoring component 825 can monitor the quality of the radio link regardless of the periodicity of the broadcast windows based on the detected presence of the RS. In some cases, the radio link monitoring component 825 may use a higher SNR within the respective transmission windows for RLM procedures. In addition or alternatively, the radio link monitoring component 825 may use an SNR associated with one or more TTIs within the respective transmission windows for the RLM procedures. In some examples, the radio link monitoring component 825 may use at least the first set of control features, the second set of control features, or a combination of them for RLM procedures.
[0001] The RS 830 manager can receive the
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RS according to the frequency of XRD and detect the presence of RS. The control feature set component 835 can identify one or more sets of control features associated with the receipt of the RS associated with the RLM procedures. In some cases, component 835 of the control feature set may identify a first set of control features associated with RS reception and identify a second set of control features associated with RS reception. In some cases, the one or more sets of control resources include at least resources associated with a common control channel or resources associated with a specific UE control channel.
[0104] The 840 decoder can decode a downlink control channel. The RLM counter manager 845 can restore an RLM counter based on the decoded downlink control channel. Additionally or alternatively, the RLM counter manager 845 can boost an RLM counter based on the decoded downlink control channel. In some cases, boosting the RLM counter may include identifying an aggregation level associated with the downlink control channel and boosting the RLM counter based on the identified aggregation level. Additionally or alternatively, boosting the RLM counter may include identifying a type of control channel associated with the downlink control channel (such as common, group-specific or EU-specific control) and boosting the RLM counter based on the identified type of control channel resources.
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48/77 [0105] Figure 9 shows a diagram of a 900 system, which includes a 905 device, which supports RLM without permanent RSs according to aspects of the present disclosure. The device 905 can be an example or include the components of the wireless device 605, the wireless device 705 or an UE 115, as described above, for example, with reference to Figures 1, 6 and 7. The device 905 can include components for bidirectional voice and data communications, which include components for transmitting and receiving communications, which include the UE 905 RLM manager, the 920 processor, the 925 memory, the 930 software, the 935 transceiver, the 940 antenna and controller I / O 945. These components can be in electronic communication through one or more buses (such as, for example, the 910 bus). Device 905 can communicate wirelessly with one or more base stations 105.
[0106] The 920 processor may include an intelligent hardware device (such as a general purpose processor, a DSP, a central processing unit (CRU), a microcontroller, an ASIC, an FPGA, a programmable logic device , a discrete gate or logic component of the transistor, a discrete hardware component, or any combination thereof). In some cases, the 920 processor can be configured to operate a memory array using a memory controller. In other cases, a memory controller can be integrated into the 920 processor. The 920 processor can be configured to execute computer-readable instructions stored in memory to perform various
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49/77 functions (such as functions or tasks that support RLM without permanent RSs). For example, the 920 processor can be configured to execute instructions to identify a DRX periodicity for an RS and monitor a radio link quality using the identified DRX periodicity. The 920 processor can also be configured to execute instructions to detect or select an RS, decode a downlink control channel, restore or boost an RLM counter and / or measure the quality of an RS, among other functions.
[0107] The 925 memory can include random access memory (RAM) and read-only memory (ROM). The 925 memory can store computer-readable software, executable by computer 930, which includes instructions that, when executed, cause the processor to perform the various functions described here. In some cases, the 925 memory may contain, among other things, a basic input / output system (BIOS) that can control the basic functioning of hardware and / or software, such as interaction with peripheral components or devices.
[0108] Software 930 may include code to implement aspects of the present disclosure, which include code to support RLM without permanent RSs. The 930 software can be stored in a non-transient, computer-readable medium, such as system memory or other memory. In some cases, the 930 software may not be directly executable by the processor, but it can cause a computer (such as, when compiled and run) to perform the functions described here.
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50/77 [0109] The 935 transceiver can communicate bidirectionally, through one or more antennas, wired or wireless links, as described above. For example, the 935 transceiver can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 935 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission and to demodulate the packets received from the antennas. In some cases, the wireless device may include a single 940 antenna. However, in some cases, the device may have more than one 940 antenna, which may be able to transmit or receive multiple wireless transmissions concurrently. The transceiver 935 can, for example, receive an RS, receive an indication of a length of a transmission window and / or receive an indication of an XRD periodicity.
[0110] The I / O controller 945 can manage input and output signals for the 905 device. The I / O controller 945 can also manage peripherals not integrated in the 905 device. In some cases, the I / O controller 945 it can represent a physical connection or port to an external peripheral. In some cases, the 945 I / O controller may use an operating system such as iOS®, ANDROID®, MSDOS®, MS-WINDOWS®, OS / 2®, UNIX®, LINUX® or other known operating system. In other cases, the 945 I / O controller can represent or interact with a modem, keyboard, mouse, touchscreen or similar device. In some cases, the I / O controller 945 can be implemented as
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51/77 part of a processor. In some cases, a user can interact with device 905 through the I / O controller 945 or through hardware components controlled by the I / O controller 945.
[0111] Figure 10 shows a block diagram 1000 of a wireless device 1005 that supports RLM without permanent RSs according to aspects of the present disclosure. Wireless device 1005 can be an example of aspects of a transmitting device, such as a base station 105, as described with reference to Figure 1. Wireless device 1005 can include receiver 1010, the base station RLM manager 1015 and transmitter 1020. The wireless device 1005 may also include a processor. Each of these components can be in communication with each other (for example, through one or more buses).
[0112] The 1010 receiver can receive information such as packets, user data or control information associated with various information channels (such as, for example, control channels, data channels and information related to RLM without permanent RSs, etc. .). The information can be passed on to other components of the device. Receiver 1010 can be an example of aspects of transceiver 1335 described with reference to Figure 13. Receiver 1010 can use a single antenna or set of antennas.
[0113] The base station RLM manager 1015 can be an example of aspects of the base station RLM manager 1315 described with reference to Figure 13. The base station RLM manager 1015 and / or at least
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52/77 some of its various subcomponents can be implemented in hardware, software executed by a processor, firmware or any combination thereof. If implemented in software run by a processor, the functions of the 1015 base station RLM manager and / or at least some of its various subcomponents can be performed by a general purpose processor, DSP, ASIC, FPGA or other device programmable logic, discrete gate or transistor logic, discrete hardware components or any combination of these designed to perform the functions described in this disclosure.
[0114] The base station RLM manager 1015 and / or at least some of its various subcomponents may be physically located in different positions, including being distributed so that parts of functions are implemented in different physical locations by one or more physical devices . In some examples, the base station RLM manager 1015 and / or at least some of its various subcomponents may be a separate and distinct component according to various aspects of the present disclosure. In other examples, the base station RLM manager 1015 and / or at least some of its various subcomponents can be combined with one or more other hardware components, which include, but are not limited to, an I / O component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure or a combination of them, according to various aspects of the present disclosure.
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53/77 [0115] The RLM base station manager 1015 can identify an RS for a downlink control channel, where the RS can be associated with RLM procedures and configure a DRX periodicity for the RS. The transmitter 1020 can transmit signals generated by other components of the device. In some examples, transmitter 1020 can be placed with a receiver 1010 in a transceiver module. For example, transmitter 1020 can be an example of aspects of transceiver 1335 described with reference to Figure 13. Transmitter 1020 can use a single antenna or set of antennas. In some examples, transmitter 1020 can transmit RS according to the configured DRX periodicity.
[0116] Figure 11 shows a block diagram 1100 of a wireless device 1105 that supports RLM without permanent RSs according to aspects of the present disclosure. Wireless device 1105 can be an example of aspects of a wireless device 1005 or a base station 105, as described with reference to Figures 1 and 10. Wireless device 1105 can include receiver 1110, the RLM manager of base station 1115 and transmitter 1120. Wireless device 1105 may also include a processor. Each of these components can be in communication with each other (for example, through one or more buses).
[0117] Receiver 1110 can receive information such as packets, user data or control information associated with various information channels (such as, for example, control channels, data channels and information related to RLM without RSs
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54/77 permanent, etc.). The information can be passed on to other components of the device. The receiver 1110 can be an example of aspects of transceiver 1335 described with reference to Figure 13. The receiver 1110 can use a single antenna or a set of antennas.
[0118] The base station RLM manager 1115 can be an example of aspects of the base station RLM manager 1315 described with reference to Figure 13. The base station RLM manager 1115 can also include the downlink RS component 1125 and the DRX 1130 configuration manager. The 1125 downlink RS component can identify an RS that may be associated with RLM procedures. The RS can be associated with a downlink control channel.
[0119] The DRX 1130 configuration manager can configure a DRX periodicity for RS. In some cases, configuring the DRX periodicity for the RS may include configuring a discrete transmission periodicity of the RS. Additionally or alternatively, configuring the DRX periodicity for the RS may include configuring a transmission window periodicity for the RS, where the RS is transmitted within the respective transmission windows. In some cases, each of the respective transmission windows comprises one or more TTIs and the RS can be included within at least one TTI of one or more TTIs. In some cases, the DRX frequency for RS is independent of the control channel transmissions. In some cases, the DRX 1130 configuration manager can transmit an indication of a length of the respective transmission windows, where the indication is
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55/77 transmitted via RRC signaling, broadcast signaling of system information or a combination of them.
[0120] The 1120 transmitter can transmit signals generated by other components of the device. In some examples, transmitter 1120 can be placed with a receiver 1110 on a transceiver module. For example, transmitter 1120 can be an example of aspects of transceiver 1335 described with reference to Figure 13. Transmitter 1120 can use a single antenna or a set of antennas. In some examples, transmitter 1120 can transmit RS according to the configured DRX periodicity.
[0121] Figure 12 shows a block diagram 1200 of a base station RLM manager 1215 that supports RLM without permanent RSs according to aspects of the present disclosure. The base station RLM manager 1215 can be an example of aspects of a base station RLM manager 1315 described with reference to Figures 10, 11 and 13. The base station RLM manager 1215 can include the downlink RS component 1220, the DRX configuration manager 1225, the control feature set manager 1230 and the DRX indication manager 1235. Each of these modules can be
communicate, direct or indirectly , with each other (such as , at through one or more buses).[0122] 0 component of LOL downlink 1220 can identify one RS that can be associated with procedures RLM. 0 RS may be associated with a control channel downlink. 0 manager in
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56/77 DRX configuration 1225 can configure a DRX periodicity for RS. In some cases, configuring the DRX periodicity for the RS may include configuring a discrete transmission periodicity of the RS. Additionally or alternatively, configuring the DRX periodicity for the RS may include configuring a transmission window periodicity for the RS, where the RS is transmitted within the respective transmission windows. In some cases, at least one TTI within the respective transmission windows includes the RS. In some cases, the DRX frequency for RS is independent of the control channel transmissions. In some cases, the DRX 1225 configuration manager can transmit an indication of a length of the respective transmission windows, where the indication is transmitted through RRC signaling, system information broadcast signaling or a combination of them.
[0123] The 1230 control resource set manager can configure one or more control resource sets for transmission of the RS associated with the RLM procedures. In some cases, the one or more sets of control resources include at least resources associated with a common control channel or resources associated with a specific UE control channel. The DRX indication manager 1235 can transmit an indication of the configured DRX periodicity, in which the indication is transmitted using RRC signaling, broadcast signaling of system information or a combination of them.
[0124] Figure 13 shows a diagram of a
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57/77 system 1300 which includes a device 1305 that supports RLM without permanent RSs according to aspects of the present disclosure. Device 1305 can be an example or include components of base station 105 as described above, for example, with reference to Figure 1. Device 1305 can include components for bidirectional data and voice communications, which include components for transmitting and receiving data. communications, which include the base station RLM manager 1315, the processor 1320, the memory 1325, the software 1330, the transceiver 1335, the antenna 1340, the network communications manager 1345 and the inter-station communications manager 1350. These components can be in electronic communication through one or more buses (such as, for example, the 1310 bus). The 1305 device can communicate wirelessly with one or more 115 UEs.
[0125] The 1320 processor may include an intelligent hardware device (such as a general purpose processor, DSP, CPU, microcontroller, ASIC, FPGA, programmable logic device, gate logic component) discrete or transistor, a discrete hardware component or any combination thereof). In some cases, the 1320 processor can be configured to operate a memory array using a memory controller. In other cases, a memory controller can be integrated into the 1320 processor. The 1320 processor can be configured to execute computer-readable instructions stored in memory to perform a variety of functions (such as functions or tasks that support RLM without permanent RSs. ).
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For example, the 1320 processor can be configured to execute computer-readable instructions to identify an RS, configure a DRX periodicity for the RS, configure a discrete transmission periodicity and / or transmission windows for the RS and / or configure sets of control resources, among other functions.
[0126] The 1325 memory can include RAM and ROM. The 1325 memory can store computer-readable, computer-executable 1330 software, which includes instructions that, when executed, cause the processor to perform the various functions described here. In some cases, the 1325 memory may contain, among other things, a BIOS that can control the basic functioning of hardware and / or software, such as interaction with peripheral components or devices.
[0127] Software 1330 may include code to implement aspects of the present disclosure, which include code to support RLM without permanent RSs. The 1330 software can be stored in a non-transient, computer-readable medium, such as system memory or other memory. In some cases, the 1330 software may not be directly executable by the processor, but it can cause a computer (such as, when compiled and run) to perform the functions described here.
[0128] The 1335 transceiver can communicate bidirectionally, through one or more antennas, wired or wireless links, as described above. For example, the 1335 transceiver can represent a wireless transceiver and can communicate bidirectionally with another transceiver
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59/77 wireless. Transceiver 1335 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission and to demodulate packets received from the antennas. In some cases, the wireless device may include a single 1340 antenna. However, in some cases, the device may have more than one 1340 antenna, which may be capable of simultaneously transmitting or receiving multiple wireless transmissions. The transceiver 1335 can, for example, transmit an RS, transmit an indication of a length of a transmission window and / or transmit an indication of the configured periodicity of DRX.
[0129] 0 network communications manager
1345 can manage communications with the central network (for example, through one or more wired return links). For example, the network communications manager 1345 can manage the transfer of data communications to client devices, such as one or more UEs
115.
[0130] The interstations communications manager 1350 can manage communications with other base stations 105 and may include a controller or programmer to control communications with UEs 115 in cooperation with other base stations 105. For example, the interstations communications manager 1350 can coordinate scheduling for transmissions to UEs 115 for various interference mitigation techniques such as beam formation or joint transmission. In some instances, the inter-station communications manager 1350 may provide an X2 interface within
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60/77 LTE / LTE-A wireless communication network to provide communication between base stations 105.
[0131] Figure 14 shows a flow chart illustrating a 1400 method for RLM without permanent RSs according to aspects of the present disclosure. The operations of method 1400 can be implemented by a receiving device, such as a UE 115 or its components, as described herein. For example, method 1400 operations can be performed by a UE RLM manager, as described with reference to Figures 6 to 9. In some examples, a UE 115 can execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 can perform aspects of the functions described below using special purpose hardware.
[0132] In 1405, UE 115 can identify a DRX periodicity for an RS associated with RLM procedures. The RS can be associated with a downlink control channel. The 1405 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of the operations
1405 can to be made by a manager in periodicity of XRD, according described with reference at Figures 6 to 9. [0133] In 1410, the EU 115 can monitor an
radio link quality based, at least in part, on the identified frequency of XRD. 1410 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples,
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61/77 aspects of 1410 operations can be performed by a radio link monitoring component, as described with reference to Figures 6 to 9.
[0134] In 1415, the UE 115 can receive the RS according to the frequency of XRD. The 1415 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of the 1415 operations can be performed by an RS manager, as described with reference to Figures 6 to 9 .
[0135] Figure 15 shows a flow chart illustrating a 1500 method for RLM without permanent RSs according to aspects of the present disclosure. The 1500 method operations can be implemented by a receiving device, such as a UE 115, or its components, as described herein. For example, method 1500 operations can be performed by a UE RLM manager, as described with reference to Figures 6 to 9. In some examples, a UE 115 can execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 can perform aspects of the functions described below using special purpose hardware.
[0136] In 1505 the UE 115 can determine a periodicity of discrete transmissions from an RS. The 1505 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of the 1505 operations can be performed by an XRD periodicity manager,
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62/77 as described with reference to Figures 6 to 9.
[0137] In 1510, the UE 115 can monitor a radio link quality based, at least in part, on an identified frequency of XRD. The 1510 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of the 1510 operations can be performed by a radio link monitoring component as described with reference to the Figures of 6 to 9.
[0138] In 1515, the UE 115 can detect a RS presence. The 1515 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of the 1515 operations can be performed by an RS manager as described with reference to Figures 6 to 9.
[0139] In 1520, the UE 115 can optionally (as, for example, opportunistically) monitor the radio link quality regardless of the frequency of the RS's discrete transmissions based, at least in part, on the detected presence of the RS. The 1520 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of the 1520 operations can be performed by a radio link monitoring component as described with reference to the Figures of 6 to 9.
[0140] Figure 16 shows a flow chart illustrating a 1600 method for RLM without permanent RSs according to aspects of the present disclosure. The 1600 method operations can be implemented by a receiving device, such as a UE 115, or its components, as
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63/77 described herein. For example, operations of method 1600 can be performed by a UE RLM manager as described with reference to Figures 6 to 9. In some examples, a UE 115 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 can perform aspects of the functions described below using special purpose hardware.
[0141] In 1605, the UE 115 can determine a transmission window periodicity for an RS. 1605 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of 1605 operations can be performed by a DRX periodicity manager, as described with reference to Figures 6 to 9.
[0142] In 1610, the UE 115 can monitor a radio link quality based, at least in part, on an identified frequency of XRD. 1610 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of 1610 operations can be performed by a radio link monitoring component as described with reference to Figures 6 to 9.
[0143] In 1615, the UE 115 can detect the presence of the RS, where the RS is detected within the respective transmission windows. 1615 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of 1615 operations can be performed by a data manager.
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RS as described with reference to Figures 6 to 9.
[0144] In 1620, the UE 115 can optionally (as, for example, opportunistically) monitor the radio link quality regardless of the periodicity of the transmission windows based, at least in part, on the detected presence of the RS. The 1620 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of the 1620 operations can be performed by a radio link monitoring component as described with reference to the Figures of 6 to 9.
[0145] Figure 17 shows a flow chart illustrating a 1700 method for RLM without permanent RSs according to aspects of the present disclosure. The 1700 method operations can be implemented by a receiving device, such as an UE 115, or its components, as described herein. For example, method 1700 operations can be performed by a UE RLM manager, as described with reference to Figures 6 to 9. In some examples, a UE 115 can execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 can perform aspects of the functions described below using special purpose hardware.
[0146] In 1705, the UE 115 can identify an XRD periodicity for an RS associated with RLM procedures. The RS can be associated with a downlink control channel. 1705 operations can be performed according to the methods described with reference to Figures
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65/77 from 1 to 5. In certain examples, aspects of 1705 operations can be performed by a DRX periodicity manager as described with reference to Figures 6 to 9.
[0147] In 1710, the UE 115 can monitor a radio link quality based, at least in part, on the identified frequency of XRD. 1710 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of 1710 operations can be performed by a radio link monitoring component as described with reference to Figures from 6 to 9.
[0148] In 1715, the UE 115 can receive the RS according to the frequency of XRD. 1715 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of 1715 operations can be performed by an RS manager as described with reference to Figures 6 to 9.
[0149] In 1720, the UE 115 can decode a downlink control channel. 1720 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of 1720 operations can be performed by a decoder as described with reference to Figures 6 to 9.
[0150] In 1725, the UE 115 can restore an RLM counter (such as an N310 counter) based, at least in part, on the decoded downlink control channel. The 1725 operations can be carried out in
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66/77 according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of the 1725 operations can be performed by an RLM count manager as described with reference to Figures 6 to 9.
[0151] In 1730, the UE 115 can boost an RLM counter (such as an N311 counter) based, at least in part, on the decoded downlink control channel. 1730 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of 1730 operations can be performed by an RLM count manager as described with reference to Figures 6 to 9.
[0152] Figure 18 shows a flow chart illustrating an 1800 method for RLM without permanent RSs according to aspects of the present disclosure. The 1800 method operations can be implemented by a transmission device, such as a base station 105 or its components, as described herein. For example, method 1800 operations can be performed by a base station RLM manager, as described with reference to Figures 10 through 13. In some examples, a base station 105 can execute a set of codes to control the functional elements device to perform the functions described below. In addition or alternatively, the base station 105 can perform aspects of the functions described below using special purpose hardware.
[0153] In 1805 the base station 105 can
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67/77 identify an SR associated with RLM procedures. The RS can be associated with a downlink control channel. 1805 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of 1805 operations can be performed by a downlink RS component, as described with reference to Figures 10 to 13.
[0154] In 1810, base station 105 can configure a DRX periodicity for RS. 1810 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of 1810 operations can be performed by a DRX configuration manager as described with reference to Figures 10 to 13.
[0155] In 1815, base station 105 can transmit RS according to the configured periodicity of DRX. The 1815 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of the 1815 operations can be performed by a transmitter as described with reference to Figures 10 to 13.
[0156] Figure 19 shows a flow chart illustrating a 1900 method for RLM without permanent RSs according to aspects of the present disclosure. The 1900 method operations can be implemented by a transmission device, such as a base station 105 or its components, as described herein. For example, 1900 method operations can be performed by a base station RLM manager, as described with reference to Figures 10 through 13. In some examples, a
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68/77 base station 105 can execute a set of codes to control the functional elements of the device to perform the functions described below. In addition or alternatively, the base station 105 can perform aspects of the functions described below using special purpose hardware.
[0157] In 1905, base station 105 can identify an RS for a downlink control channel, where the RS is associated with RLM procedures. 1905 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of 1905 operations can be performed by a downlink RS component, as described with reference to Figures 10 to 13.
[0158] In 1910, base station 105 can configure a DRX periodicity for RS. 1910 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of 1910 operations can be performed by an XRD configuration manager, as described with reference to Figures 10 to 13.
[0159] In 1915, base station 105 can configure one or more sets of control resources for transmitting the RS associated with RLM procedures, where the one or more sets of control resources comprise at least resources associated with a channel control system or resources associated with a specific EU control channel. 1915 operations can be carried out according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of
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6 °> / ΊΊ 1915 operations can be performed by a manager of a set of control resources, as described with reference to Figures 10 to 13.
[0160] In 1920, base station 105 can transmit RS according to the configured periodicity of DRX. 1920 operations can be performed according to the methods described with reference to Figures 1 to 5. In certain examples, aspects of 1920 operations can be performed by a transmitter, as described with reference to Figures 10 to 13.
[0161] It should be noted that the methods described above describe possible implementations and that the operations and steps can be redistributed or otherwise modified so that other implementations are possible. In addition, aspects from two or more of the methods can be combined.
[0162] The techniques described here can be used for several wireless communication systems, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA) , orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SCFDMA) and other systems. A CDMA system can implement radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers the IS-2000, IS-95 and IS-856 standards. IS-2000 versions are commonly referred to as CDMA2000 lx, ix, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 IxEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes CDMA
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70/77 broadband (WCDMA) and other CDMA variants. A TDMA system can implement radio technology like the Global Mobile Communications System (GSM).
[0163] An OFDMA system can implement radio technology such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (WiFi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash -OFDM, etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE 3GPP and LTE-A are versions of the Universal Mobile Telecommunications System (UMTS) that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, NR and the Global System for Mobile Communications (GSM) are described in documents from an organization called Partnership Project 3. Generation (3GPP) . The CDMA2000 and UMB are described in documents from an organization called Partnership Project 3. Generation 2 (3GPP2). The techniques described here can be used for the radio systems and technologies mentioned above, as well as for other radio systems and technologies. Although aspects of an LTE or NR system can be described for exemplary purposes, and LTE or NR terminology can be used in much of the disclosure, the techniques described here are applicable in addition to LTE or NR applications.
[0164] In LTE / LTE-A networks, which include the networks described here, the term Evolved B node (eNB) can generally be used to describe base stations. The wireless communication system or systems described here may include a heterogeneous LTE / LTEA or NR network in which different types of evolved B-node (eNBs) provide
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71/77 coverage for several geographic regions. For example, each eNB, gNB or base station can provide communication coverage for a macro cell, a small cell or other types of cell. The term cell can be used to describe a base station, a carrier or component carrier associated with a base station or a coverage area (such as, sector, etc.) of a carrier or base station, depending on the context.
[0165] Base stations may include or may be referred to by those skilled in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, eNodeB (eNB), a NodeB next generation (gNB), Domestic Node, a Domestic eNode or some other suitable terminology. The geographical coverage area of a base station can be divided into sectors, making up only a part of the coverage area. The wireless communications system or systems described herein can include base stations of different types (such as, for example, macro or small cell base stations). The UEs described herein may be able to communicate with various types of base stations and network equipment, which includes macro eNBs, small cell eNBs, gNBs, relay base stations and the like. There may be overlapping geographic coverage areas for different technologies.
[0166] A macro cell generally covers a relatively large geographic area (such as a radius of many kilometers) and can allow unrestricted access by UEs with service subscriptions with the network provider. A small cell is a base station for
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72/77 lower power compared to a macro cell, which can operate in the same frequency band or in different frequency bands (such as licensed, unlicensed, etc.). Small cells can include picocells, femto-cells and micro-cells, according to several examples. A peak cell can generally cover a relatively smaller geographical area and can allow unrestricted access by UEs with service subscriptions from the network provider. A femto-cell can also cover a relatively small geographical area (a residence, for example) and can provide restricted access by UEs that are associated with the femto-cell (UEs in a closed group of subscribers (CSG), UEs for users in the residence and the like, for example). An eNB for a macro cell can be referred to as a macro-eNB. A small cell eNB can be referred to as small cell eNB, pico-eNB, femto-eNB or home eNB. An eNB can support one or multiple (such as, two, three, four and the like) cells (such as component carriers).
[0167] The wireless communication system or systems described here can support synchronous or asynchronous operation. For synchronous operation, base stations may have similar frame timings and transmissions from different base stations may be approximately time aligned. For asynchronous operation, base stations may have different frame timings and transmissions from different base stations may not be time aligned. The techniques described here can be used for operation
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73/77 synchronous or asynchronous.
[0168] The downlink streams described here can also be called direct link streams, while uplink streams can also be called reverse link streams. Each communication link described here, which includes, for example, the wireless communication system 100 in Figure 1 - can include one or more carriers, where each carrier can be a signal consisting of multiple subcarriers (such as, for example, waveform of different frequencies).
[0169] The description presented here, in connection with the attached drawings, describes exemplary configurations and does not represent all examples that can be implemented or that are within the scope of the claims. The term exemplary used here means to serve as an example, instance or illustration, and not preferred or advantageous over other examples. The detailed description includes specific details for the purpose of providing an understanding of the techniques described. These techniques, however, can be practiced without these specific details. In some cases, well-known structures and devices are shown in the form of a block diagram to avoid obscuring the exemplary concepts described.
[0170] In the attached figures, components or similar characteristics may have the same reference marker. In addition, several components of the same type can be distinguished by following the reference marker by a dashed line and a second marker
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74/77 that distinguishes between similar components. If only the first reference marker is used in the report, the description applies to any of the similar components that have the same first reference marker, regardless of the second reference marker.
[0171] The information and signals described here can be represented using any of several different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols and chips that can be referenced throughout the above disclosure can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0172] The various illustrative blocks and modules described in connection with the present disclosure can be implemented or executed with a general purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic, components discrete hardware or any combination of these designed to perform the functions described here. A general purpose processor can be a microprocessor, but, alternatively, the processor can be any conventional processor, controller, microcontroller or state machine. A processor can also be implemented as a combination of computing devices (such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core or
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75/77 any other configuration).
[0173] The functions described here can be implemented in hardware, software executed by a processor, firmware or any combination thereof. If implemented in software run by a processor, functions can be stored or transmitted as one or more instructions or code in a computer-readable medium. Other examples and implementations are within the scope and spirit of the disclosure and attached claims. For example, due to the nature of the software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring or combinations of any of them. Resources that implement functions can also be physically located in different positions, including being distributed so that parts of functions are implemented in different physical locations. As here, including in the claims, the term and / or, when used in a list of two or more items, means that any of the items listed can be used alone, or any combination of two or more of the items listed can be employed. For example, if a composition is described as containing components A, B and / or C, the composition can contain A alone; B alone; C alone; A and B in combination; A and C in combination; B and C in combination; or A, B and C in combination. Also, as used herein, including in the claims, or as used in a list of items (such as, for example, a list of items preceded by a phrase such as at least one of or one or more of) indicates such a disjunctive list
Petition 870190089416, of 10/09/2019, p. 82/114
76/77 that, for example, a list of at least one of A, B or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Also, as used here, the phrase based on will not be interpreted as a reference to a closed set of conditions. For example, an exemplary step that is described as based on condition A can be based on both condition A and condition B without abandoning the scope of the present disclosure. In other words, as used here, the phrase based on will be interpreted in the same way as the phrase based at least in part on.
[0174] The computer-readable medium includes both non-transitory computer storage medium and communication medium, which includes any medium that facilitates the transfer of a computer program from one place to another. A non-transitory storage medium can be any available medium that can be accessed by a general purpose or special purpose computer. For example, and not by way of limitation, non-transient, computer-readable media may comprise RAM, ROM, electrically erasable read-only memory (EEPROM), compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic device, storage devices, or any other non-transitory medium that can be used to transport or store the desired program code in the form of instructions or data structures and that can be accessed by a general purpose or special purpose computer, or general-purpose processor or special-purpose processor. In addition, any
Petition 870190089416, of 10/09/2019, p. 83/114
77/77 connection is appropriately called a computer-readable medium. For example, if the software is transmitted from a website, server or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technologies such as infrared, radio and microwaves, coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technologies, such as infrared, radio and microwave, are included in the media definition. Disc (Disk) and disc (disc), as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disc and Blu-ray disc, where discs (disks) generally reproduce data magnetically, while discs (discs) reproduce data optically with lasers. Combinations of the above items are also included in the range of the computer-readable medium.
[0175] The description here is provided to allow a person skilled in the art to manufacture or use the disclosure. Several changes in the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other variations without abandoning the scope of the disclosure. Thus, the disclosure should not be limited to the examples and drawings described here, but should receive the widest range compatible with the innovative principles and characteristics disclosed here.

权利要求:
Claims (28)
[1]
1. Method for wireless communication on user equipment (UE), comprising:
identify a discontinuous reception periodicity (DRX) for a reference signal (RS) used for radio link monitoring (RLM) procedures;
monitor, based at least in part on the identified frequency of RSD DRX, a radio link quality; and receive the RS according to the frequency of XRD.
[2]
2. Method according to claim 1, which also comprises:
determine a periodicity of discrete transmissions from RS.
[3]
A method according to claim 2, which also comprises:
monitor radio link quality regardless of the frequency of RS's discrete transmissions, based, at least in part, on a detected RS presence.
[4]
A method according to claim 1, which also comprises:
determine a window periodicity of
transmission to the LOL, where RS is received within respective windows in transmission, andto monitor The quality of link radio independently gives Frequency of windows of
transmission, based, at least in part, on a presence
Petition 870190089416, of 10/09/2019, p. 85/114
2/7 detected from RS.
[5]
Method according to claim 4, wherein each of the respective transmission windows comprises one or more transmission time intervals (TTIs) and in which the RS is included within at least one TTI of the one or more TTIs .
[6]
6. Method according to claim 4, which also comprises:
receive an indication of the DRX frequency or a length of the respective transmission windows through radio resource control (RRC) signaling, broadcast signaling of system information or a combination of them.
[7]
7. Method according to claim 4, which also comprises:
select the RS within a specific transmission window for RLM procedures, based, at least in part, on one or more noise ratios (SNR) of discrete transmissions from the RS within the respective transmission windows.
[8]
8. Method according to claim 4, which also comprises:
select the RS within a specific transmission time interval (TTI) for RLM procedures based, at least in part, on one or more signal-to-noise ratios (SNRs) of discrete RS transmissions within one or more TTIs within the respective transmission windows.
[9]
9. Method, according to claim 1, in which the frequency of XRD for RS is independent of
Petition 870190089416, of 10/09/2019, p. 86/114
3 / Ί reception of control channels.
[10]
10. The method of claim 1, which also comprises:
identify one or more sets of control resources associated with receiving RS associated with RLM procedures.
[11]
11. The method of claim 10, wherein the one or more sets of control resources comprise at least resources associated with a common control channel or resources associated with a specific UE control channel.
[12]
12. Method according to claim 1, which also comprises:
identify one first set in resources in control associated with The reception RS; identify one second set in resources in control associated with The reception RS; and use at less < the first set in resources of control, O second set in resources in
control or a combination of them for RLM procedures.
[13]
13. Method according to claim 1, wherein the RLM procedures are associated with a downlink control channel, the method also comprising:
decode the downlink control channel; and restoring or boosting an RLM counter based, at least in part, on the decoded downlink control channel.
[14]
14. The method of claim 13, wherein boosting the RLM counter comprises:
Petition 870190089416, of 10/09/2019, p. 87/114
4 / Ί
identify a type of resources of channel control or a level in aggregation associated with channel control downlink; and boost O counter in RLM based, at least less in part, in type identified of resources channel control or level in aggregation.
[15]
15. Method for wireless communication at a base station, comprising:
identify a reference signal (RS) for radio link monitoring (RLM) procedures;
configure a discontinuous reception periodicity (DRX) for RS; and transmit the RS according to the configured DRX periodicity.
[16]
16. The method of claim 15, which also comprises:
configure a transmission window periodicity for the RS, in which the RS is transmitted within the respective transmission windows, or configure a discrete transmission periodicity of the RS.
[17]
17. The method of claim 15, wherein each of the respective transmission windows comprises one or more transmission time slots (TTIs), and in which the RS is transmitted within at least one TTI of the one or more TTIs.
[18]
18. The method of claim 15, which also comprises:
transmit an indication of the DRX periodicity or a length of the respective transmission windows, where the indication is transmitted via
Petition 870190089416, of 10/09/2019, p. 88/114
5/7 radio resource control (RRC) signaling, system information broadcast signaling or one of them.
[19]
19. Method according to claim 15, in which the DRX periodicity for RS is independent of the control channel transmissions.
[20]
20. Method according to claim 15, which also comprises:
configure one or more sets of control features associated with the transmission of the RS associated with the RLM procedures.
[21]
21. The method of claim 20, wherein the one or more sets of control resources comprise at least resources associated with a common control channel or resources associated with a user equipment specific control channel (UE).
[22]
22. Device for wireless communication in a system, comprising:
means for identifying a discontinuous reception periodicity (DRX) for a reference signal (RS) used for radio link monitoring (RLM) procedures;
means to monitor, based, at least in part on the identified frequency of RSD DRX, a radio link quality; and means to receive the RS according to the frequency of XRD.
[23]
23. Apparatus according to claim 22, which also comprises:
means to determine a frequency of
Petition 870190089416, of 10/09/2019, p. 89/114
6 / Ί discrete transmissions from RS.
24. Apparatus, wake up with claim 23, which also includes: means to monitor the link quality in radio, regardless of frequency of transmissions discrete RS, based, fur less in part in an detected presence of RS. 25. Apparatus, wake up with claim 22, which also includes: means to determine a periodicity in
transmission windows for the RS, where the RS is received within the respective transmission windows.
[24]
26. Apparatus according to claim 25, wherein each of the respective transmission windows comprises one or more transmission time intervals (TTIs), and in which the RS is included within one or more TTIs of the one or more TTIs.
[25]
27. Apparatus according to claim 25, which also comprises:
means for receiving an indication of the DRX periodicity or a length of the respective transmission windows by means of radio resource control (RRC) signaling, broadcast signaling of system information or a combination thereof.
[26]
28. Device for wireless communication in a system, comprising:
means for identifying a reference signal (RS) for radio link monitoring (RLM) procedures;
means to configure a periodicity of
Petition 870190089416, of 10/09/2019, p. 90/114
7/7 discontinuous reception (DRX) for RS; and means for transmitting the RS according to the configured DRX periodicity.
[27]
29. Apparatus according to claim 28, which also comprises:
means for configuring a transmission window periodicity for the RS in which the RS is transmitted within the respective transmission windows or configuring a discrete transmission periodicity of the RS.
[28]
Apparatus according to claim 29, wherein each of the respective transmission windows comprises one or more transmission time intervals (TTIs), and in which the RS is transmitted within at least one TTI of the one or more TTIs.

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TWI678940B|2019-12-01|

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WO2018169808A2|2018-09-20|

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JP2020512730A|2020-04-23|

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US20200245172A1|2020-07-30|

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

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