techniques and apparatus for utilizing a second link for beam failure recovery of a first link

专利摘要:
some aspects of the present revelation generally relate to unwired communication. in some aspects, a first apparatus may detect a beam failure of a first link between the first apparatus and the second apparatus; transmitting a beam failure recovery request indicating the beam failure of the first link, wherein the beam failure recovery request is transmitted via a second link of the first apparatus; and performing a beam failure recovery procedure to select one or more beams for communication between the first apparatus and the second apparatus, based at least in part on transmitting the beam failure recovery request via the second link. several other aspects are provided.
公开号:BR112020006254A2
申请号:R112020006254-5
申请日:2018-09-24
公开日:2020-10-06
发明作者:Yan Zhou；Sumeeth Nagaraja；Tao Luo
申请人:Qualcomm Incorporated；
IPC主号:

专利说明:

[0001] [0001] This application claims priority to U.S. Provisional Patent Application No. 62/569,002, filed on October 6, 2017, named “TECHINIQUES
[0002] [0002] Aspects of the present disclosure generally relate to unwired communication, and more particularly, to techniques and apparatus for utilizing a second link to recover from a beam failure of a first link. BACKGROUND
[0003] [0003] Unwired communication systems are widely used to provide various telecommunications services, such as telephony, video, data, messaging and broadcasts. Typical unwired communication systems may employ multiple access technologies capable of supporting communication with multiple users, by sharing available system resources (eg, bandwidth, transmission power, among others). Examples of such multiple access systems include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, division multiple access systems Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA) Systems, Time Division Synchronous Code Division Multiple Access (TD-SCDMA), and Long Term Evolution (LTE) ). LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partner Project (3GPP).
[0004] [0004] An unwired communication network may include multiple base stations (BSs) that can support communication to multiple user equipment (UEs). A user equipment (UE) can communicate with a base station (BS) via the downlink and uplink. The downlink (or direct link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail in this document, a BS may be referred to as a Node B, a gNB, an access point (AP), a radio head, a receive and transmit point (TRP), a new radio BS. (NR), a 5G node B, among others.
[0005] [0005] The above multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that allows different user equipment to communicate at municipal, national, regional and even global levels. The new radio (NR), which can also be called 5G, is a set of enhancements to the LTE mobile standard enacted by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by improving spectral efficiency, reducing costs, improving services, making use of new spectrum, and better integrating with other open standards using Frequency Division Multiplexing. Orthogonal (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP-OFDM and/or SC-FDM (e.g. also known as Discrete Fourier Transform Scattering OFDM (DFT- s-OFDM)) on the uplink (UL), as well as supporting beamforming, multi-input multi-output (MIMO) antenna technology, and carrier aggregation. However, as demand for mobile broadband access continues to increase, there is a need for further enhancements to LTE and NR technologies. Preferably, these enhancements should be applicable to other multiple access technologies and to the telecommunications standards that employ those technologies. SUMMARY
[0006] [0006] In some aspects, a method of unwired communication may include detecting, by a first apparatus, a beam failure of a first link between the first apparatus and a second apparatus; transmitting, by the first apparatus, a beam failure recovery request indicating the beam failure of the first link, wherein the beam failure recovery request is transmitted via a second link of the first apparatus; and performing, by the first apparatus, a beam failure recovery procedure to select one or more beams for communication between the first apparatus and the second apparatus, based at least in part on transmitting the beam failure recovery request via the second link.
[0007] [0007] In some aspects, a first apparatus for unwired communication may include memory and one or more processors operatively coupled with the memory. The memory and the one or more processors may be configured to detect a beam failure of a first link between the first apparatus and a second apparatus; transmitting a beam failure recovery request indicating the beam failure of the first link, wherein the beam failure recovery request is transmitted via a second link of the first apparatus; and performing a beam failure recovery procedure to select one or more beams for communication between the first apparatus and the second apparatus, based at least in part on transmitting the beam failure recovery request via the second link.
[0008] [0008] In some respects, a non-temporary computer-readable medium may store one or more instructions for non-wired communication. The one or more instructions, when executed by one or more processors of a first apparatus, may cause one or more processors to detect a beam failure of a first link between the first apparatus and a second apparatus; transmit a beam failure recovery request indicating the beam failure of the first link, where the beam failure recovery request is transmitted via a second link of the first apparatus; and perform a beam failure recovery procedure to select one or more beams for communication between the first apparatus and the second apparatus, based at least in part on transmitting the beam failure recovery request via the second link.
[0009] [0009] In some aspects, a first apparatus for unwired communication may include means for detecting a beam failure of a first link between the first apparatus and a second apparatus; means for transmitting a beam failure recovery request indicating beam failure of the first link, wherein the beam failure recovery request is transmitted via a second link of the first apparatus; and means for performing a beam failure recovery procedure to select one or more beams for communication between the first apparatus and the second apparatus, based at least in part on transmitting the beam failure recovery request via the second link.
[0010] [0010] In some aspects, a method of unwired communication may include receiving from a first device a beam failure recovery request indicating a beam failure of a first link between the first device and a second device, where the beam failure recovery request is received via a second link from the second device; and initiating, by the second device, a beam failure recovery procedure to select one or more beams for communication between the first device and the second device, based at least in part on receiving the beam failure recovery request via the second link.
[0011] [0011] In some aspects, a second apparatus for unwired communication may include memory and one or more processors operatively coupled with the memory. The memory and the one or more processors may be configured to receive, from a first device, a beam failure recovery request indicating a beam failure of a first link between the first device and the second device, where the request beam failure recovery is received via a second link from the second device; and initiating a beam failure recovery procedure to select one or more beams for communication between the first device and the second device, based at least in part on receiving the beam failure recovery request via the second link.
[0012] [0012] In some respects, a non-temporary computer-readable medium may store one or more instructions for non-wired communication. The one or more instructions, when executed by one or more processors of a second device, may cause one or more processors to receive, from a first device, a beam failure recovery request indicating a beam failure of a first device. first link between the first apparatus and the second apparatus, wherein the beam failure recovery request is received via a second link of the second apparatus; and initiate a beam failure recovery procedure to select one or more beams for communication between the first device and the second device, based at least in part on receiving the beam failure recovery request via the second link.
[0013] [0013] In some aspects, a second apparatus for unwired communication may include means for receiving, from a first apparatus, a beam failure recovery request indicating a beam failure of a first link between the first apparatus and the second device, where the beam failure recovery request is received via a second link from the second device; and means for initiating a beam failure recovery procedure for selecting one or more beams for communication between the first device and the second device, based at least in part on receiving the beam failure recovery request via the second link.
[0014] [0014] Aspects generally include a method, apparatus, system, computer program product, computer-readable non-temporary medium, user equipment, base station, unwired communication device, and processing system as substantially described herein with reference to and as illustrated by the accompanying drawings and the descriptive report.
[0015] [0015] The above has quite broadly described the characteristics and technical advantages of the examples according to the disclosure, so that the following detailed description can be better understood. Additional features and benefits will be described below. The design and specific examples disclosed can be readily used as a basis for modifying or designing other structures to accomplish the same purposes as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed in this document, their organization and method of operation, together with the associated advantages, will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purpose of illustration and description and not as a definition of the limits of the claims. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] [0016] In order that the manner in which the above-cited features of the present disclosure may be understood in detail, a more particular description, briefly summarized above, may be obtained by reference to the aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings illustrate only some typical aspects of this disclosure and, therefore, should not be considered as limiting its scope, as the description may admit other equally effective aspects. The same reference numbers in different drawings may identify the same or similar elements.
[0017] [0017] Fig. 1 is a block diagram conceptually illustrating an example of an unwired communication network, in accordance with some aspects of the present disclosure.
[0018] [0018] Fig. 2 is a block diagram conceptually illustrating an example of a base station in communication with a user equipment (UE) in an unwired communication network, in accordance with some aspects of the present disclosure.
[0019] [0019] Fig. 3 is a block diagram conceptually illustrating an example of a frame structure in an unwired communication network, in accordance with some aspects of the present disclosure.
[0020] [0020] Fig. 4 is a block diagram conceptually illustrating two examples of subframe format with the normal cyclic prefix, in accordance with some aspects of the present disclosure.
[0021] [0021] Fig. 5 is a diagram illustrating an example of unwired communication via one or more beams, in accordance with some aspects of the present disclosure.
[0022] [0022] Figs. 6 through 17 are diagrams illustrating examples of using a second link for beam failure recovery of a first link, in accordance with various aspects of the present disclosure.
[0023] [0023] Figs. 18 and 19 are diagrams illustrating illustrative processes performed, for example, by an apparatus, in accordance with various aspects of the present disclosure. DETAILED DESCRIPTION
[0024] [0024] Various aspects of the disclosure are described in more detail hereinafter with reference to the accompanying drawings. However, this disclosure may be incorporated in many different ways and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those skilled in the art. Based on the teachings of this document, one skilled in the art should appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently or in combination with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of aspects set forth herein. Additionally, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using another structure, functionality or structure and functionality in addition to or in addition to the various aspects of the disclosure set forth herein. It is to be understood that any aspect of the disclosure disclosed herein may be incorporated by one or more elements of a claim.
[0025] [0025] Various aspects of telecommunication systems will now be presented with reference to various apparatus and techniques. These apparatus and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, among others (collectively referred to as "elements"). These elements can be implemented using hardware, software or combinations thereof. Whether such elements are implemented as hardware or software depends on the particular application and the design constraints imposed on the overall system.
[0026] [0026] It is noted that while aspects may be described in this document using terminology commonly associated with 3G and/or 4G unwired technologies, aspects of the present disclosure may be applied to other generation-based communication systems, such as 5G and later versions, including NR technologies.
[0027] [0027] Fig. 1 is a diagram illustrating a network 100 in which aspects of the present disclosure may be practiced. Network 100 can be an LTE network or some other non-wired network, such as a 5G or NR network. Unwired network 100 may include multiple BSs 110 (shown as BS 1010, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with user equipment (UEs) and may also be referred to as a base station, an NR BS, a NodeB, a gNB, a 5G NodeB (NB), an access point, a point reception and transmission (TRP) and/or, among others. Each BS can provide communication coverage for a particular geographic area. In 3GPP, the term "cell" can refer to a coverage area of a BS and/or a BS subsystem serving that coverage area, depending on the context in which the term is used.
[0028] [0028] A BS can provide communication coverage for a macro cell, pico cell, femto cell and/or other cell type. A macro cell can cover a relatively large geographic area (eg, several kilometers in radius) and can allow unrestricted access by UEs with service subscriptions. A pico cell can cover a relatively small geographic area and can allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a house) and may provide restricted access by UEs having an association with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a cell macro can be referred to as a BS macro. A BS for a cell peak may be referred to as a BS peak. A BS for a femto cell may be referred to as a femto or a home BS. In the example shown in Fig. 1, a BS 110a can be a macro BS for a macro cell 102a, a BS 110b can be a pico BS for a pico cell 102b, and a BS 110c can be a femto BS for a femto cell 102c. A BS can support one or several cells (eg three). The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "node B", "5G NB", and "cell" may be used interchangeably in this document.
[0029] [0029] In some aspects, a cell may not necessarily be stationary and the geographic area of the cell may move according to the location of a mobile BS. In some aspects, the BSs may be interconnected with each other and/or with one or more other BSs or network nodes (not shown) in the access network 100 through various types of return transport channel interfaces, such as a direct physical connection, a virtual network, and/or, among others, using any suitable transport network.
[0030] [0030] Unwired network 100 may also include relay stations. A relay station is an entity that can receive a data transmission from an upstream station (e.g. a BS or a UE) and send a data transmission to a downstream station (e.g. a UE or a BS). A relay station can also be a UE that can relay transmissions to other UEs. In the example shown in Fig. 1, a relay station 110d can communicate with the macro BS 110a and with a UE 120d so as to facilitate communication between the BS 110a and the UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, and/or among others.
[0031] [0031] Unwired network 100 can be a heterogeneous network that includes BSs of different types, for example, macro BSs, pico BSs, femto BSs, relay BSs and/or, among others. These different types of BSs can have different transmit power levels, different coverage areas and different impacts on interference on the unwired network 100. For example, macro BSs can have a high transmit power level (e.g. 5 up to 40 Watts) while pico BSs, femto BSs and relay BSs may have lower transmit power levels (eg 0.1 to 2 Watts).
[0032] [0032] A network controller 130 can be coupled with a set of BSs and can provide coordination and control for those BSs. Network controller 130 may communicate with the BSs via a return transport channel. BSs can also communicate with each other, for example, directly or indirectly via an unwired or wired return transport channel.
[0033] [0033] The UEs 120 (e.g. 120a, 120b,
[0034] [0034] Some UEs can be considered Machine-Type Communication (MTC) or Evolved or Enhanced Machine-Type Communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices such as sensors, meters, monitors, location tags and/or, among others, that can communicate with a base station, with another device (for example, , the remote device), or with some other entity. An unwired node may, for example, provide connectivity to or to a network (for example, a wide area network such as the Internet or a cellular network) via a wired or unwired communication link. Some UEs can be considered Internet of Things (IoT) devices and/or can be implemented as can be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs can be considered a Customer Premises Equipment (CPE). The UE 120 may be included within a housing that houses components of the UE 120, such as processor components, memory components, and/or, among others.
[0035] [0035] In general, any number of unwired networks can be deployed in a given geographic area. Each unwired network can support a particular RAT and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, an air interface and/or, among others. A frequency can also be referred to as a carrier, a frequency channel, and/or, among others. Each frequency can support a single RAT in a given geographic area, in order to avoid interference between unwired networks of different RATs. In some cases, NR or 5G RAT networks can be implemented.
[0036] [0036] In some aspects, two or more UEs 120 (e.g. presented as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g. without using a base station 110 as an intermediary for communicate with each other). For example, the UEs 120 may communicate using point-to-point (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle protocol ( V2V), a vehicle protocol for infrastructure (V2I) and/or, among others), a mesh network and/or, among others. In this case, the UE 120 may perform scheduling operations, resource selection operations, and/or other operations described herein as being performed by the base station 110.
[0037] [0037] As indicated above, Fig. 1 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 1.
[0038] [0038] Fig. 2 shows a block diagram of a design of the base station 110 and the UE 120, which can be one of the base stations and one of the UEs in Fig.
[0039] [0039] At base station 110, a transmission processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and encoding schemes (MCS) for each UE based on at least in part, on channel quality indicators (CQIs) received from the UE, processing (e.g., encoding and modulating) the data for each UE based at least in part on the MCSs selected for the UE, and providing data symbols for all the EUs. The transmission processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or, among others) and control information (e.g., CQI requests, grants, upper layer signaling and/or, among others) and provide overhead symbols and control symbols.
[0040] [0040] At UE 120, antennas 252a to 252r can receive downlink signals from base station 110 and/or other base stations and can provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 can condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples. Each demodulator 254 may additionally process the input samples (e.g., for OFDM and/or, among others) to obtain received symbols. A MIMO detector 256 can obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols, if applicable, and provide detected symbols. A receiving processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data to UE 120 to a data collector 260, and provide decoded control information and system information to a controller/processor. 280. A channel processor can determine the received reference signal power (RSRP), the received signal strength indicator (RSSI), the received reference signal quality (RSRQ), the channel quality indicator (CQI) , and/or, among others.
[0041] [0041] On the uplink, at the UE 120, a transmission processor 264 may receive and process data from a data source 262 and control information (e.g. for reports comprising RSRP, RSSI, RSRQ, CQI and/or , among others) from the controller /
[0042] [0042] In some aspects, one or more components of the UE 120 may be included in a housing. The controller/processor 240 of the base station 110, the controller/processor 280 of the UE 120, and/or any other component (components) of Fig. 2 may perform one or more techniques associated with using a second link for beam failure recovery. a first link, as described in more detail elsewhere in this document.
[0043] [0043] In some aspects, a first apparatus (e.g., UE 120, base station 110 and/or, among others) may include means for detecting a beam failure in a first link between the first apparatus and a second apparatus ; means for transmitting a beam failure recovery request indicating beam failure on the first link, wherein the beam failure recovery request is transmitted via a second link of the first apparatus; means for performing a beam failure recovery procedure to select one or more beams for communication between the first apparatus and the second apparatus; and/or, among others. Additionally or alternatively, a second apparatus (e.g., UE 120, base station 110 and/or, among others) may include means for receiving, from a first apparatus, a beam failure recovery request indicating a failure. beam on a first link between the first apparatus and the second apparatus, wherein the beam failure recovery request is received via a second link of the second apparatus; means for initiating a beam failure recovery procedure to select one or more beams for communication between the first apparatus and the second apparatus; and/or, among others. In some aspects, such means may include one or more components of UE 120 and/or base station 110 described in connection with Fig. 2.
[0044] [0044] As indicated above, Fig. 2 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 2.
[0045] [0045] Fig. 3 presents an example frame structure 300 for frequency division duplexing (FDD) in a telecommunications system (eg LTE). The transmission timeline for each of the downlink and uplink can be divided into units of radio frames. Each radio frame may have a predetermined duration (eg, 10 milliseconds (ms)) and may be divided into 10 subframes with indices from 0 to 9. Each subframe may include two partitions. Each radio frame can therefore include 20 partitions with indices from 0 to 19. Each partition can include L symbol periods, for example seven symbol periods for a normal cyclic prefix (as shown in Fig. 3) or six symbol periods of symbols for an extended cyclic prefix. The 2L symbol periods in each subframe can be assigned indices from 0 to 2L-1.
[0046] [0046] Although some techniques are described in this document in connection with frames, subframes, partitions and/or, among others, these techniques may equally apply to other types of non-wired communication structures, which may be referred to using terms other than "frame", "subframe", "partition" and/or, among others in 5G NR. In some respects, an unwired communication structure may refer to a time-limited periodic communication unit defined by an unwired communication standard and/or protocol.
[0047] [0047] In some telecommunications (e.g. LTE), a BS may transmit a primary sync signal (PSS) and a secondary sync signal (SSS) on the downlink at the center of the system bandwidth for each cell supported by the BS . PSS and SSS can be transmitted in symbol periods 6 and 5, respectively, in subframes 0 and 5 of each radio frame with the normal cyclic prefix, as shown in Fig. 3. PSS and SSS can be used by UEs for research and acquisition of cells. The BS can transmit a cell-specific reference signal (CRS) across the system bandwidth for each cell supported by the BS. The CRS may be transmitted in a few symbol periods of each subframe and may be used by UEs to perform channel estimation, channel quality measurement and/or other functions. The BS may also transmit a physical transmission channel (PBCH) in symbol periods 0 through 3 in partition 1 of some radio frames. The PBCH can carry some system information. The BS may transmit other system information, such as system information blocks (SIBs), on a physical downlink shared channel (PDSCH) in some subframes. The BS can transmit the control information/data on a physical downlink control channel (PDCCH) in the first few
[0048] [0048] In other systems (eg, such as NR or 5G systems), a Node B may transmit these or other signals at those locations or at different locations in the subframe.
[0049] [0049] As indicated above, Fig. 3 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 3.
[0050] [0050] Fig. 4 shows two examples of subframe formats 410 and 420 with the normal cyclic prefix. Available frequency and time resources can be divided into resource blocks. Each resource block can cover 12 subcarriers in a partition and can include multiple resource elements. Each resource element can cover a subcarrier in a symbol period and can be used to send a modulation symbol, which can be a real or complex value.
[0051] [0051] Subframe format 410 can be used for two antennas. A CRS can be transmitted from antennas 0 and 1 in symbol periods 0, 4, 7 and
[0052] [0052] The PSS, SSS, CRS and PBCH in LTE are described in the Technical Specification (TS) of 3GPP 36.211, called “Evolved Universal Terrestrial Radio Access (E-UTRA) Physical Channels and Modulation”, which is publicly available.
[0053] [0053] An interlace structure can be used for each of the downlink and uplink for FDD in some telecommunication systems (eg LTE). For example, Q loops with indices from 0 to Q - 1 can be defined, where Q can be equal to 4, 6, 8, 10 or some other value. Each interlace may include subframes that are spaced by Q frames. In particular, the interlace q may include subframes q, q + Q, q + 2Q and/or,
[0054] [0054] The unwired network can support Hybrid Automatic Retransmission Request (HARQ) for transmitting data on the downlink and uplink. For HARQ, a sender (eg a BS) may send one or more transmissions of a packet until the packet is correctly decoded by a receiver (eg a UE) or some other termination condition is met. For synchronous HARQ, all packet transmissions can be sent in subframes of a single interlace. For asynchronous HARQ, each packet transmission can be sent in any subframe.
[0055] [0055] A UE may be located within the coverage of multiple BSs. One of these BSs can be selected to serve the UE. The serving BS can be selected based, at least in part, on various criteria, such as received signal strength, received signal quality, path loss, and/or, among others. The received signal quality can be quantified by an interference signal-to-noise ratio (SINR), or a reference signal received quality (RSRQ), or some other metric. The UE may operate in a dominant interference scenario, in which the UE may observe high interference from one or more interfering BSs.
[0056] [0056] While aspects of the examples described in this document may be associated with LTE technologies, aspects of the present disclosure may be applicable to other non-wired communication systems, such as NR or 5G technologies.
[0057] [0057] New radio (NR) can refer to radios configured to operate under a new air interface (e.g., other than air interfaces based on Orthogonal Frequency Division Multiple Access (OFDMA)) or transport layer (for example, other than Internet Protocol) (IP)). In aspects, NR can use OFDM with a CP (in this document referred to as cyclic prefix OFDM or CP-OFDM) and/or SC-FDM on the uplink, can use CP-OFDM on the downlink and include support for half-duplex operation using time division duplexing (TDD). In aspects, the NR may, for example, use OFDM with a CP (referred to herein as CP-OFDM) and/or Fourier Transform Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) on the uplink, may use CP-OFDM on the downlink and include support for half-duplex operation using TDD. NR may include Enhanced Mobile Broadband service targeting broadband (eg 80 megahertz (MHz) and beyond) millimeter wave (mmW) targeting high carrier frequency (eg 60 gigahertz (GHz), MTC (mMTC) targeting non-backward compatible MTC techniques and/or mission critical targeting ultra-reliable low-latency communications (URLLC) services.
[0058] [0058] A single component carrier bandwidth of 100 MHz can be supported. NR resource blocks can span 12 subcarriers with a subcarrier bandwidth of 75 kilohertz (kHz) for a duration of 0.1 ms. Each radio frame can include 50 subframes with a duration of 10 ms. Consequently,
[0059] [0059] Beamshaping can be supported and beam direction can be dynamically set. MIMO streams with pre-encoding can also be supported. MIMO configurations in DL can support up to 8 broadcast antennas with multi-layer DL transmissions, up to 8 streams and up to 2 streams per UE. Multi-layer transmissions with up to 2 streams per UE can be supported. Multiple cell aggregation can be supported with up to 8 service cells. Alternatively, the NR may support a different air interface that is not an OFDM-based interface. NR networks can include entities such as central units or distributed units.
[0060] [0060] The RAN can include a central unit (CU) and distributed units (DUs). An NR BS (e.g. gNB, 5G Node B, Node B, receive and transmit point (TRP), access point (AP)) can correspond to one or more BSs. NR cells can be configured as access cells (ACells) or data-only cells (DCells). For example, the RAN (eg a central unit or distributed unit) can configure the cells. DCells can be cells used for carrier aggregation or dual connectivity, but not used for initial access, cell selection/reselection, or handover. In some cases, DCells may not transmit sync signals. In some cases, DCells can transmit sync signals. The NR BSs can transmit OS downlink signals to the UEs indicating the cell type. Based, at least in part, on the cell type indication, the UE can communicate with the NR BS. For example, the UE may determine the NR BSs to consider for cell selection, handover and/or measurement based at least in part on the indicated cell type,
[0061] [0061] As indicated above, Fig. 4 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 4.
[0062] [0062] Fig. 5 is a diagram illustrating an example 500 of unwired communications via one or more beams, in accordance with various aspects of the present disclosure.
[0063] [0063] As shown in Fig. 5, a first handset 505 (e.g. shown as a UE in example 500) can communicate with a second handset 510 (e.g. shown as a base station in example 500) using one or more more active beams 515. In some aspects, the first apparatus 505 and the second apparatus 510 may also be able to communicate via one or more candidate beams 520. In some aspects, an active beam 515 may be selected from a set of candidate beams 520 by comparing beam parameters (e.g., RSRP, RSRQ, RSSI, and/or, among others) from the set of candidate beams 520. For example, an active beam 515 may be the beam that has the best beam parameters among all beams in the candidate beam set 520. In some respects, the beams may operate in a millimeter-wave radio frequency band.
[0064] [0064] In some respects, if the active beam 515 experiences a failure, the first apparatus 505 may perform a time-consuming and energy-inefficient beam failure recovery procedure. For example, upon detecting the failure of active beam 515, the first apparatus 505 may attempt to communicate with the second apparatus 510 by transmitting a Beam Failure Recovery Request (BFRR) via one or more candidate beams 520. In some cases, all previously identified candidate beams 520 may fail to pass the BFRR to the second device 510. In this situation, the first device 505 may have to wait for a periodic reference signal to be transmitted by the second device 510 via a set of preconfigured beams. covering all directions before the first apparatus 505 can measure the periodic reference signal, identify new candidate beams 520, and transmit the BFRR via the new candidate beam 520. Additionally or alternatively, the first apparatus 505 may attempt to transmit a BFRR via the various candidate beams 520 in sequence (for example, using a contention-free random access (CFRA) procedure) and may use a candidate beam 520 as an active beam 515 if the first device 505 receives a response to the BFRR in the candidate beam 520. Otherwise, the first device 505 may send the BFRR via the next candidate beam 520. If the first device 505 does not receive any response using the procedure
[0065] [0065] This beam failure recovery procedure may be time consuming, may waste resources of the first 505 device (e.g. processor resources, memory resources, battery power and/or etc), may waste network resources (for example, time and frequency resources) and/or, among others. Additionally, if the first apparatus 505 has data to be transmitted, the above beam failure recovery procedure can result in long delays in data transmission, particularly if a random access channel (RACH) periodicity is long (e.g., periodicity for transmitting a RACH preamble to inform the second apparatus 510). Some techniques and devices described in this document allow a second device-to-device link to be used to assist in beam failure recovery of a first device-to-device link, thereby conserving device resources, conserving network resources, reducing data transmission delays. and/or, among others. Additional details are described below.
[0066] [0066] As indicated above, Fig. 5 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 5.
[0067] [0067] Fig. 6 is a diagram illustrating an example 600 of using a second link for beam failure recovery of a first link, in accordance with various aspects of the present disclosure.
[0068] [0068] As shown in Fig. 6, a first device 605 may be able to communicate with a second device 610 via a first link 615 and a second link
[0069] [0069] As shown by reference numeral 625, the first apparatus 605 can detect a beam failure of the first link 615 between the first apparatus 605 and the second apparatus 610. In some respects, the first link 615 is a direct link between the first apparatus 605 and the second apparatus 610. first apparatus 605 and second apparatus 610 without intervening apparatuses on the first link 615 (e.g., a device-to-device (D2D) link, a BS-to-UE link, a side link, and/or, among others). In some respects, the first link 615 is a link that supports beamforming, such as a millimeter wave link (eg, a link in the millimeter wave frequency band) and/or, among others. In some respects, the beam failure is a complete failure of all service control channels associated with the first 605 device and/or the first 615 link. In some respects, the beam failure is a partial failure of the server control channels. associated with the first apparatus 605 and/or with the first link 615 (e.g., a failure of a subset of the server control channels).
[0070] [0070] As shown by reference numeral 630, the first apparatus 605 may transmit, via the second link 620, a Beam Failure Recovery (BFRR) request indicating a beam failure of the first link 615. In some respects, the second link 620 is another direct link between the first device 605 and the second device 610 with no intervening devices on the second link 620. In some respects, the second link 620 is an indirect link between the first device 605 and the second device 610 (e.g. , with one or more intervening devices on the second link 620 that retransmit the BFRR). The second link 620 may include, for example, an unwired link, a wired link, or some combination thereof. In some respects, the first link 615 and the second link 620 use the same frequency band. For example, the first link 615 and the second link 620 may both use a millimeter wave frequency band. In some respects, the first link 615 and the second link 620 use different frequency bands.
[0071] [0071] In some aspects, the first apparatus 605 may transmit the BFRR via the second link 620 based, at least in part, on the determination that the first apparatus 605 has transmitted a threshold number of BFRRs via the first link 615 without a response to from the second apparatus 610. For example, the first apparatus 605 may first attempt to perform beam failure recovery via the first link 615 and may attempt to perform beam failure recovery via the second link 620 after determining that beam failed on first link
[0072] [0072] As shown by reference numeral 635, the second apparatus 610 may initiate a Beam Fault Recovery (BFR) procedure to select a beam (e.g. an active beam) for communication between the first apparatus 605 and the second device 610. In some respects, the BFRR may be used to initiate the BFR procedure, and the second device 610 may initiate the BFR procedure based, at least in part, on receiving the BFRR via the second link 620. For example, the BFRR may indicate that an active beam (e.g., first link 615) between first apparatus 605 and second apparatus 610 has failed and may trigger a BFR procedure to first apparatus 605 and/or second apparatus 610 to identify a beam at be used as a new active beam between the first apparatus 605 and the second apparatus 610.
[0073] [0073] As shown by reference numeral 640, the first apparatus 605 may perform a BFR procedure to select a beam (e.g., an active beam) for communication between the first apparatus 605 and the second apparatus 610. For example, transmission of the BFRR by the first apparatus 605 and/or the reception of the BFRR by the second apparatus 610 can trigger the BFR procedure, and the first apparatus 605 and the second apparatus 610 can communicate to perform the BFR procedure, as described in more detail elsewhere in this document. This BFR procedure can conserve resources from the first device 605 and/or the second device 610, can conserve network resources, can reduce communication delays and/or, among others, compared to a BFR procedure that does not use the second link 620 between the first apparatus 605 and the second apparatus 610. Additional details are described below.
[0074] [0074] As indicated above, Fig. 6 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 6.
[0075] [0075] Fig. 7 is a diagram illustrating another example 700 of using a second link for beam failure recovery of a first link, in accordance with various aspects of the present disclosure.
[0076] [0076] As shown in Fig. 7, the first apparatus may be a first UE 705 and the second apparatus may be a second UE 710. The first UE 705 and/or the second UE 710 may correspond to one or more UEs described in elsewhere in this document. As shown further, the first link may be a direct link between the first UE 705 and the second UE 710, and the second link may be an indirect link between the first UE 705 and the second UE 710 via a base station 715. The station base 715 may correspond to one or more base stations described elsewhere in this document.
[0077] [0077] In example 700, the first UE 705 and the second UE 710 are connected to the same base station 715. In that case, the first UE 705 may transmit the BFRR to the base station 715 via the second link and the base station 715 may relay the BFRR to the second UE 710. In some respects, the first link (for example, between the first UE
[0078] [0078] As shown by reference numeral 720, the first UE 705 can detect a beam failure of the first link between the first UE 705 and the second UE 710, in a similar manner as described above in connection with Fig. 6.
[0079] [0079] As shown by reference numeral 725, first UE 705 may transmit a BFRR, indicating first link beam failure, via a second link between first UE 705 and base station 715. As shown by reference numeral 730, base station 715 may relay the BFRR to the second UE 710. In some aspects, the first UE 705 may include, in the BFRR, a UE identifier that identifies the second UE 710 (e.g., an international mobile subscriber identity). (IMSI), an Internet Protocol (IP) address, a mobile directory number (MDN) and/or, among others) and base station 715 may use the UE identifier to relay the BFRR to the second UE 710.
[0080] [0080] In some aspects, before transmitting the BFRR to the base station 715, the first UE 705 may determine whether the first UE 705 and the second UE 710 are connected to the same base station 715. For example, the second UE 710 may transmitting to the first UE 705 a cell identifier that identifies the cell to which the second UE 710 is connected. In some aspects, the second UE 710 may transmit the cell identifier to the first UE 705 during a procedure to negotiate and/or establish the first link. Additionally, or alternatively, the second UE 710 may periodically transmit the cell identifier to the first UE 705 (e.g., via the first link). Additionally or alternatively, the second UE 710 may transmit the cell identifier to the first UE 705 based, at least in part, on the occurrence of an event (e.g., a change in the cell to which the second UE 710 is connected).
[0081] [0081] In some aspects, the first UE 705 may transmit the BFRR to the base station 715 via the second link based, at least in part, on the determination that the first UE 705 and the second UE 710 are connected to the same base station 715. In this case, the first UE 705 can transmit the BFRR only if the first UE 705 and the second UE 710 are connected to the same base station 715. Alternatively, the first UE 705 can transmit the BFRR independently of the first UE 705 and the second UE 710 are connected with the same base station 715 and the base station 715 can identify whether the second UE 710 is connected with the base station 715 or with the other base station (e.g. and can therefore retransmit the BFRR).
[0082] [0082] As shown by reference numeral 735, upon receiving the BFRR relayed by base station 715, the second UE 710 may initiate a beam failure recovery procedure to select one or more beams for communication between the first UE 705 and the second UE 710. For example, the second UE 710 may transmit one or more reference signals (e.g. presented as RS) on one or more beams in accordance with a beam management procedure (e.g. presented as BM). In some aspects, the second UE 710 may perform beam scanning by transmitting the reference signals in multiple beams (e.g., all configured beams, a subset of all configured beams, and/or among others).
[0083] [0083] As shown by reference numeral 740, the first UE 705 may perform a beam failure recovery procedure to select one or more beams for communication between the first UE 705 and the second UE 710. For example, the first UE 705 can measure the reference signals transmitted by the second UE 710 and can compare the reference signals to identify a beam to be used as an active beam for communications between the first UE 705 and the second UE 710. For example, the first UE 705 can select a beam associated with better signal strength, better signal quality, better signal strength and/or, among others, compared to other beams. As shown, the first UE 705 may indicate the selected beam to the second UE 710 (e.g., by transmitting a beam index that identifies the selected beam).
[0084] [0084] As shown by reference numeral 745, the first UE 705 and the second UE 710 can recover a failed link (e.g., the first failed link which is a D2D link). In some aspects, the selected beam may be the same beam that failed previously (e.g., which may be fine tuned via a switch of beam configuration parameters between the first UE 705 and the second UE 710). In some respects, the selected beam may be a different beam than the one that previously failed.
[0085] [0085] By using the second link of the first UE 705 to assist in beam failure recovery when the first link of the first UE 705 fails, the resources of the first UE 705 and/or the second UE 710 can be conserved, network resources can be conserved, and communication delays can be reduced compared to a beam failure recovery procedure that does not use the second link to aid beam failure recovery.
[0086] [0086] As indicated above, Fig. 7 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 7.
[0087] [0087] Fig. 8 is a diagram illustrating another example 800 of using a second link for beam failure recovery of a first link, in accordance with various aspects of the present disclosure.
[0088] [0088] As shown in Fig. 8, the first apparatus may be a first UE 805 and the second apparatus may be a second UE 810. The first UE 805 and/or the second UE 810 may correspond to one or more UEs described in elsewhere in this document. As shown further, the first link may be a direct link between the first UE 805 and the second UE 810, and the second link may be an indirect link between the first UE 805 and the second UE 810 via a first base station 815 and a second base station 820. First base station 815 and/or second base station 820 may correspond to one or more base stations described elsewhere in this document.
[0089] [0089] In example 800, the first UE 805 and the second UE 810 are connected to different base stations. For example, the first UE 805 is connected to the first base station 815 and the second UE 810 is connected to the second base station 820. In that case, the first UE 805 can transmit the BFRR to the first base station 815 via the second link , the first base station 815 may relay the BFRR to the second base station 820 and the second base station 820 may relay the BFRR to the second UE 810. The first base station 815 and the second base station 820 may be connected via an unconnected connection. wired (for example, the unwired return transport channel), a wired connection, or a combination of wired and unwired connections.
[0090] [0090] As shown by reference numeral 825, the first UE 805 can detect a beam failure of the first link between the first UE 805 and the second UE 810, in a similar manner as described above in connection with Fig. 6.
[0091] [0091] As shown by reference numeral 830, the first UE 805 may transmit a BFRR, indicating the beam failure of the first link, via a second link between the first UE 805 and the first base station 815, in a similar manner as described above in connection with Fig. 7. As shown by reference numeral 835, first base station 815 may relay the BFRR to second base station 820. In some aspects, first UE 805 may include, in the BFRR, an identifier of UE that identifies the second UE 810, a cell identifier that identifies the cell to which the second UE 810 is connected and/or, among others. The first base station 815 may use the UE identifier and/or the cell identifier to identify the second base station 820 to which the second UE 810 is connected. Additionally or alternatively, the first base station 815 may transmit the BFRR to one or more neighboring cells of the first base station 815 without identifying the second base station 820 to which the second UE 810 is connected. As shown by reference numeral 840, second base station 820 may relay the BFRR to second UE 810 (e.g., using a UE identifier of second UE 810).
[0092] [0092] As shown by reference numeral 845, upon receiving the BFRR retransmitted by the first base station 815 and the second base station 820, the second UE 810 may initiate a beam failure recovery procedure to select one or more beams for communication between the first UE 805 and the second UE 810, in a similar manner as described above in connection with Fig. 7. As shown by reference numeral 850, the first UE 805 may perform a beam failure recovery procedure to select one or more beams for communication between the first UE 805 and the second UE 810, in a similar manner as described above in connection with Fig. 7.
[0093] [0093] As shown by reference number 855, the first UE 805 and the second UE 810 can recover from a failed link, in a similar manner as described above in connection with Fig. 7. By utilizing the second link of the first UE 805 to assist in beam failure recovery when the first link of the first UE 805 fails, the resources of the first UE 805 and/or the second UE 810 can be conserved, network resources can be conserved, and communication delays can be reduced compared to a beam failure recovery procedure that does not utilize the second link to aid in beam failure recovery.
[0094] [0094] As indicated above, Fig. 8 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 8.
[0095] [0095] Fig. 9 is a diagram illustrating another example 900 of using a second link for beam failure recovery of a first link, in accordance with various aspects of the present disclosure.
[0096] [0096] As shown in Fig. 9, the first apparatus may be a UE 905 and the second apparatus may be a base station 910. The UE 905 may correspond to one or more UEs described elsewhere in this document. Base station 910 may correspond to one or more base stations described elsewhere in this document. As shown further, the first link may be a direct link between UE 905 and base station 910, and the second link may also be a direct link between UE 905 and base station 910. In some respects, the first link may use a millimeter wave frequency band and the second link can use a frequency band below 6 GHz.
[0097] [0097] As shown by reference numeral 915, UE 905 can detect a beam failure of the first link between UE 905 and base station 910, in a similar manner as described above in connection with Fig.
[0098] [0098] As shown by reference numeral 920, UE 905 may transmit a BFRR, indicating failure of the first link beam, via the second link between UE 905 and base station 910, in a similar manner as described above in connection with Fig. 7.
[0099] [0099] As shown by reference numeral 925, upon receiving the BFRR from the UE 905, the base station 910 may initiate a beam failure recovery procedure to select one or more beams for communication between the UE 905 and the station base 910, in a manner similar to that described above in connection with Fig. 7. As shown by reference numeral 930, the UE 905 may perform a beam failure recovery procedure to select one or more beams for communication between the UE 905 and base station 910, in a similar manner as described above in connection with Fig. 7.
[00100] [00100] As shown by reference number 935, UE 905 and base station 910 can recover from a failed link, in a similar manner as described above in connection with Fig. 7. By Using the second link of UE 905 to help with beam failure recovery when the first UE 905 link fails, UE 905 and/or base station 910 resources can be conserved, network resources can be conserved, and communication delays can be reduced compared to a beam failure recovery procedure that does not use the second link to assist in beam failure recovery.
[00101] [00101] As indicated above, Fig. 9 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 9.
[00102] [00102] Fig. 10 is a diagram illustrating another example 1000 of using a second link for beam failure recovery of a first link, in accordance with various aspects of the present disclosure.
[00103] [00103] As shown in Fig. 10 , the first apparatus may be a UE 1005 and the second apparatus may be a first base station 1010. The UE 1005 may correspond to one or more UEs described elsewhere in this document and the first station base 1010 may correspond to one or more base stations described elsewhere in this document. As further shown, the first link may be a direct link between UE 1005 and first base station 1010, and the second link may be an indirect link between UE 1005 and first base station 1010 via a second base station 1015. second base station 1015 may correspond to one or more base stations described elsewhere in this document. The first base station 1010 and the second base station 1015 can be connected via an unwired connection (eg, unwired return transport channel), a wired connection, or a combination of wired and unwired connections. In some respects, the first link may use a millimeter wave frequency band and the second link may use a frequency band below 6 GHz.
[00104] [00104] As shown by reference numeral 1020, UE 1005 can detect a beam failure of the first link between UE 1005 and first base station 1010, in a similar manner as described above in connection with Fig. 6.
[00105] [00105] As shown by reference numeral 1025, UE 1005 may transmit a BFRR, indicating failure of the first link beam, via a second link between UE 1005 and second base station 1015, in a similar manner as described above in connection with Fig. 7.
[00106] [00106] As shown by the reference numeral 1030, the second base station 1015 may relay the BFRR to the first base station 1010. In some aspects, the UE 1005 may include, in the BFRR, a UE identifier that identifies the UE 1005, a cell identifier that identifies the first base station 1010 and/or, among others. The second base station 1015 may use the UE identifier and/or the cell identifier to identify the first base station 1010.
[00107] [00107] As shown by reference numeral 1035, upon receiving the BFRR retransmitted by the second base station 1015, the first base station 1010 may initiate a beam failure recovery procedure to select one or more beams for communication between the UE 1005 and the first base station 1010, in a similar manner as described above in connection with Fig.7. As shown by reference numeral 1040, the UE 1005 may perform a beam failure recovery procedure to select one or more beams for communication between the UE 1005 and the first base station 1010, in a manner similar to that described above in connection with Fig.7.
[00108] [00108] As shown by the reference number 1045, the UE 1005 and the first base station 1010 can recover a failed link in a similar manner as described above in connection with Fig. 7. By using the second link of the UE 1005 to Assist in Beam Failure Recovery When the first UE 1005 link fails, the resources of the UE 1005 and/or the first base station 1010 can be conserved, network resources can be conserved, and communication delays can be reduced compared to a beam failure recovery procedure that does not use the second link to aid in beam failure recovery.
[00109] [00109] As indicated above, Fig. 10 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 10.
[00110] [00110] Fig. 11 is a diagram illustrating another example 1100 of using a second link for beam failure recovery of a first link, in accordance with various aspects of the present disclosure.
[00111] [00111] As shown in Fig. 11, a first apparatus 1105 (e.g. a UE, a base station and/or, among others) can communicate with a second apparatus 1110 (e.g. a UE, a base station, and/or, but not limited to) via a first link (eg a direct link) and a second link (eg a direct link or an indirect link), as described elsewhere in this document.
[00112] [00112] As shown by reference numeral 1115, upon detecting a beam failure of the first link, the first apparatus 1105 may transmit a BFRR, indicating the failure of the beam of the first link, via a second link of the first apparatus 1105. The second device 1110 can receive the BFRR via the second link.
[00113] [00113] As shown by reference number 1120, upon receiving the BFRR via the second link, the second apparatus 1110 can initiate a beam failure recovery procedure to select one or more beams for communication between the first apparatus 1105 and the second apparatus 1110. As shown, the BFRR may drive the second apparatus 1110 to transmit multiple reference signals (e.g. presented as RS) on multiple beams in accordance with a beam management procedure (e.g. presented as BM), which may also be referred to as beam refinement, a beam failure recovery procedure and/or, among others. For example, the second apparatus 1110 can perform beam scanning by transmitting reference signals in multiple beams (e.g., all configured beams, a subset of all configured beams, and/or among others).
[00114] [00114] In some respects, the first device
[00115] [00115] The beam management configuration can indicate, for example, a time (for example, a point in time, a time period, a time window and/or, among others) associated with the fault recovery procedure of the beam (for example, a time for transmission of reference signals in several beams). For example, the beam management setting can indicate a start time for the beam failure recovery procedure, a time window during which the beam management procedure must take place, and/or among others. Additionally or alternatively, the beam management configuration may indicate one or more resources to be used to perform the beam failure recovery procedure. For example, the beam management configuration may indicate one or more resource blocks in which one or more reference signals are to be transmitted (e.g. a time resource and/or a frequency resource for transmitting reference signals) , a beam in which an initial reference signal must be transmitted, a sequence of beams in which the reference signals must be transmitted and/or, among others. Additionally or alternatively, the beam management configuration may indicate one or more resource blocks to be used for other communications associated with beam failure recovery, such as one or more resource blocks to be used to indicate a selected beam.
[00116] [00116] As shown by reference numeral 1125, the first apparatus 1105 may perform a beam failure recovery procedure to select one or more beams for communication between the first apparatus 1105 and the second apparatus 1110. For example, the first apparatus 1105 can measure various reference signals received from the second apparatus 1110 in various beams and can compare the reference signals to identify a beam to be selected as an active beam for communications between the first apparatus 1105 and the second apparatus 1110. For example , the first apparatus 1105 can select a beam associated with the best signal strength, the best signal quality, the best signal strength and/or, among others, compared to other beams. As shown, the first apparatus 1105 can indicate the selected beam to the second apparatus 1110 (e.g., by transmitting a beam index that identifies the selected beam).
[00117] [00117] As shown by reference numbers 1130 and 1135, the first apparatus 1105 and the second apparatus 1110 can recover a failed link (eg, the first failed link, which is a D2D link). For example, upon receiving an indication of the selected beam, the second apparatus 1110 may transmit a grant indicating one or more features of the selected beam to be used for data transmission by the first apparatus 1105. The first apparatus 1105 may transmit the data to the second device 1110 using the indicated feature(s) of the selected beam.
[00118] [00118] By using the second link of the first apparatus 1105 to assist in beam failure recovery when the first link between the first apparatus 1105 and the second apparatus 1110 fails, the resources of the first apparatus 1105 and/or the second apparatus 1110 may can be conserved, network resources can be conserved and communication delays can be reduced compared to a beam failure recovery procedure that does not use the second link to aid in beam failure recovery.
[00119] [00119] As indicated above, Fig. 11 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 11.
[00120] [00120] Fig. 12 is a diagram illustrating another example 1200 of using a second link for beam failure recovery of a first link, in accordance with various aspects of the present disclosure.
[00121] [00121] As shown in Fig. 12, a first apparatus 1205 (e.g. a UE, a base station and/or, among others) can communicate with a second apparatus 1210 (e.g. a UE, a base station and /or, among others) via a first link (for example, a direct link) and a second link (for example, a direct link or an indirect link), as described elsewhere in this document.
[00122] [00122] As shown by reference numeral 1215, upon detecting a first link beam failure, the first apparatus 1205 may transmit a BFRR, indicating the first link beam failure, via a second link of the first apparatus 1205, as described elsewhere in this document. The second apparatus 1210 can receive the BFRR via the second link.
[00123] [00123] As shown by reference number 1220, upon receiving the BFRR via the second link, the second apparatus 1210 can initiate a beam failure recovery procedure to select one or more beams for communication between the first apparatus 1205 and the second apparatus 1210. As shown, the BFRR can trigger the second apparatus 1210 to set up an on-demand random access channel (RACH) procedure for a beam scan. Using the RACH procedure, the second apparatus 1210 can configure one or more resources (e.g., resource blocks, time resources, frequency resources, beams and/or, among others) on which the second apparatus 1210 will be configured to measure the reference signals transmitted by the first apparatus 1205. The second apparatus 1210 may indicate to the first apparatus 1205 the one or more resources that the first apparatus 1205 should use for transmitting reference signals.
[00124] [00124] As shown by reference numeral 1225, first apparatus 1205 may perform a beam failure recovery procedure by transmitting the reference signals using one or more resources indicated by second apparatus 1210. For example, first apparatus 1205 can transmit multiple reference signals in multiple beams (e.g. via a beam scan). In some aspects, the first apparatus 1205 can scan reference signals in multiple transmit (Tx) beams in a RACH partition and the second apparatus 1210 can use a fixed receive (Rx) beam to receive the reference signals.
[00125] [00125] As shown by reference numeral 1230, second apparatus 1210 may indicate one or more beams to be used for communication between first apparatus 1205 and second apparatus 1210. For example, second apparatus 1210 may measure multiple reference signals received from the first apparatus 1205 in multiple beams and can compare the reference signals to identify a pair of beams to be selected as an active beam pair for communications between the first apparatus 1205 and the second apparatus 1210. For example, the second apparatus 1210 can select a pair of beams associated with the best signal strength, the best signal quality, the best signal strength and/or, among others, compared to other pairs of beams. As shown, the second apparatus 1210 may indicate the selected beam to the first apparatus 1205 via the second link (e.g., by transmitting a beam index that identifies the selected beam to be used by the first apparatus 1205).
[00126] [00126] As shown by reference numbers 1235 and 1240, the first apparatus 1205 and the second apparatus 1210 can recover from a failed link. For example, when selecting a beam and indicating the selected beam to the first apparatus 1205, the second apparatus 1210 may transmit a grant that indicates one or more features of the selected beam to be used for data transmission by the first apparatus 1205. In some aspects , the second apparatus 1210 may indicate a grant timing (e.g. in association with transmitting the selected beam to the first apparatus 1205) and may transmit the grant in accordance with the timing. The first apparatus 1205 may transmit the data to the second apparatus 1210 using the indicated resource(s) of the selected beam.
[00127] [00127] By using the second link of the first apparatus 1205 to assist in beam failure recovery when the first link between the first apparatus 1205 and the second apparatus 1210 fails, the resources of the first apparatus 1205 and/or the second apparatus 1210 may can be conserved, network resources can be conserved and communication delays can be reduced compared to a beam failure recovery procedure that does not use the second link to aid in beam failure recovery.
[00128] [00128] As indicated above, Fig. 12 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 12.
[00129] [00129] Fig. 13 is a diagram illustrating another example 1300 of using a second link for beam failure recovery of a first link, in accordance with various aspects of the present disclosure.
[00130] [00130] As shown in Fig. 13, a first apparatus 1305 (e.g. a UE, a base station and/or, among others) can communicate with a second apparatus 1310 (e.g. a UE, a base station and /or, among others) via a first link (for example, a direct link) and a second link (for example, a direct link or an indirect link), as described elsewhere in this document.
[00131] [00131] As shown by reference number 1315, upon detecting a first link beam failure, the first apparatus 1305 may transmit a BFRR, indicating the first link beam failure, via a second link from the first apparatus 1305, as described elsewhere in this document. The second apparatus 1310 can receive the BFRR via the second link.
[00132] [00132] In some respects, the BFRR may indicate one or more beams to be used for communication between the first device 1305 and the second device 1310 (eg, to recover from the failure of the beam of the first link). For example, the BFRR may include a beam index for the beam to be used as the active beam. In this case, the first apparatus 1305 may use one or more previously measured reference signals (e.g., channel state information (CSI)-RS) on one or more beams to select a beam, rather than triggering transmission of additional reference signals for the selected beam, thereby conserving first apparatus 1305 resources, second apparatus 1310 resources, and network resources. In some aspects, the BFRR may include a list of beam indices, based on which the second apparatus 1310 may, in sequence, attempt to send data to the first apparatus 1305.
[00133] [00133] In some aspects, the first apparatus 1305 and/or the second apparatus 1310 may communicate, via the second link, a timing to be used for beam failure recovery (e.g., a timing for transmitting a grant via the selected beam). For example, the first apparatus 1305 may indicate timing to the second apparatus 1310 via the second link. In some aspects, the first apparatus 1305 can indicate the time in the BFRR. Additionally or alternatively, the second apparatus 1310 may indicate the timing to the first apparatus 1305 via the second link after receiving the BFRR from the first apparatus.
[00134] [00134] As shown by reference numbers 1320 and 1325, the first apparatus 1305 and the second apparatus 1310 can recover from a failed link. For example, when receiving an indication of the selected beam from the first 1305 fixture (e.g. in the BFRR),
[00135] [00135] As indicated above, Fig. 13 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 13.
[00136] [00136] Fig. 14 is a diagram illustrating another example 1400 of using a second link for beam failure recovery of a first link, in accordance with various aspects of the present disclosure.
[00137] [00137] As shown in Fig. 14 , a first apparatus 1405 (e.g. presented as a UE) can communicate with a second apparatus 1410 (e.g. presented as a base station) via a first link (e.g. a direct link) and a second link (for example, a direct link or an indirect link), as described elsewhere in this document. Example 1400 is an example where the first 1405 device detects a beam failure of an uplink control beam (for example, a failure of all or a subset of uplink control beams), but where one or more beams of downlink control do not experience a failure. For example, the uplink control beam(s) may fail due to a maximum allowable exposure (MPE) issue, an unbalanced power issue, uplink interference, and/or so on.
[00138] [00138] As shown by reference number 1415, upon detecting a failure of the uplink beam of the first link (for example, and determining that one or more downlink beams have not failed on the first link), the first apparatus 1405 can transmit a BFRR , indicating failure of the uplink beam from the first link, via a second link from the first device 1405, as described elsewhere in this document. The second apparatus 1410 can receive the BFRR via the second link. In some respects, the BFRR may indicate that the beam failure is an uplink beam failure and/or may indicate that the beam failure recovery procedure must be performed to recover an uplink beam.
[00139] [00139] As shown by reference numeral 1420, first apparatus 1405 and second apparatus 1410 can recover a failed link by performing an uplink beam failure recovery procedure. In that case, one or more beam failure recovery procedures described elsewhere in this document can be performed to select a beam (eg, a beam-pair link). In some respects, the beam failure recovery procedure may be performed to select a new, separate beam pair for uplink communications, which is different from the beam pair for downlink communications. In some respects, the beam failure recovery procedure may be performed to select a new common beam pair for uplink and downlink communications. Thus, one or more selected beams determined based at least in part on performing the beam failure recovery procedure may include only a separate beam pair for uplink communications, or a common beam pair for uplink and downlink communications. In this way, the resources of the first device 1405 and/or the second device 1410 can be conserved, the network resources can be conserved, the communication delays can be reduced and/or, among others. Similarly, if only the downlink beams fail, the beam failure recovery procedure can identify a new separate beam pair for downlink communications or a new common beam pair for uplink and downlink communications. The corresponding training and/or reconfiguration can be programmed and/or signaled via the second link.
[00140] [00140] As indicated above, Fig. 14 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 14.
[00141] [00141] Fig. 15 is a diagram illustrating another example 1500 of using a second link for beam failure recovery of a first link, in accordance with various aspects of the present disclosure.
[00142] [00142] As shown in Fig. 15, a first apparatus 1505 (e.g., presented as a UE) can communicate with a second apparatus 1510 (e.g., presented as a base station) via a first link (e.g., a direct link) and a second link (for example, a direct link or an indirect link), as described elsewhere in this document. Example 1500 is another example where the first 1505 device detects a beam failure of an uplink control beam (for example, a failure of all or a subset of uplink control beams), but where one or more beams of downlink control do not experience a failure. For example, the uplink control beam(s) may fail due to a maximum allowable exposure (MPE) issue, an unbalanced power issue, uplink interference, and/or so on.
[00143] [00143] As shown by reference number 1515, upon detecting a failure of the uplink beam of the first link (for example, and determining that one or more downlink beams have not failed on the first link), the first device 1505 can transmit a BFRR , indicating failure of the uplink beam from the first link, via a second link from the first device 1505, as described elsewhere in this document. The second apparatus 1510 can receive the BFRR via the second link. In some respects, BFRR may indicate that the beam failure is an uplink beam failure, may indicate that the beam failure recovery procedure must be performed to recover an uplink beam, may indicate that the first link must be used for downlink communications and the second link or a third link must be used for uplink and/or communications, among others. For example, the BFRR may instruct the second device 1510 to initiate a supplemental downlink mode, where the first link is used for downlink transmissions (e.g.,
[00144] [00144] As shown by reference number 1520, first apparatus 1505 and second apparatus 1510 can recover a failed link by performing a supplemental downlink (SDL) operation. In this case, the first apparatus 1505 and the second apparatus 1510 may use the first link only for downlink communications transmitted from the second apparatus 1510 to the first apparatus 1505. Additionally or alternatively, the first apparatus 1505 and the second apparatus 1510 may use the second link (for example, the link over which the BFRR was transmitted) or a third link (for example, using a frequency band below 6 GHz) for uplink communications transmitted from the first 1505 device to the second device
[00145] [00145] As indicated above, Fig. 15 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 15.
[00146] [00146] Fig. 16 is a diagram illustrating another example 1600 of using a second link for beam failure recovery of a first link, in accordance with various aspects of the present disclosure.
[00147] [00147] As shown in Fig. 16, a first apparatus 1605 (e.g. a UE, a base station and/or, among others) can communicate with a second apparatus 1610 (e.g. a UE, a base station and /or, among others) via a first link (for example, a direct link) and a second link (for example, a direct link or an indirect link), as described elsewhere in this document.
[00148] [00148] As shown by reference number 1615, upon detecting a first link beam failure, the first device 1605 may transmit a BFRR, indicating the first link beam failure, via a second link from the first device 1605, as described elsewhere in this document.
[00149] [00149] As shown by reference number 1620, in some respects a beam failure recovery procedure, triggered by the BFRR transmission, may fail. For example, the second apparatus 1610 may fail to receive the BFRR (e.g., after a single transmission and/or one or more retransmissions), the first apparatus 1605 may not receive a response to the BFRR from the second apparatus 1610, the first device 1605 may fail to select a beam (eg, due to not detecting any available beams with a beam parameter that satisfies a condition) and/or, among others.
[00150] [00150] As shown by reference number 1625, based at least in part on the determination that the beam failure recovery procedure has failed, the first apparatus 1605 can program a subsequent beam failure recovery procedure (for example, it can reprogram the BFR procedure), you can disable the first link and/or, among others. In some aspects, the first apparatus 1605 may schedule a subsequent beam failure recovery procedure and may indicate a timing for the subsequent beam failure recovery procedure to the second apparatus 1610 via the second link. Additionally or alternatively, the first apparatus 1605 may disable the first link. In some aspects, the first apparatus 1605 may transmit, via the second link, an indication that the first link is to be deactivated. Additionally or alternatively, the second apparatus 1610 may transmit, via the second link, an indication that the first link is to be deactivated. Later (e.g., due to the expiration of a timer, due to the determination that the beam conditions have improved and/or, among others), the first apparatus 1605 and/or the second apparatus 1610 may transmit, via the second link, a indication that the first link must be reactivated. In this way, the resources of the first device 1605 and/or the second device 1610 can be conserved, the network resources can be conserved, the communication delays can be reduced and/or, among others.
[00151] [00151] As indicated above, Fig. 16 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 16.
[00152] [00152] Fig. 17 is a diagram illustrating another example 1700 of using a second link for beam failure recovery of a first link, in accordance with various aspects of the present disclosure.
[00153] [00153] As shown in Fig. 17, a first apparatus 1705 (e.g. a UE, a base station and/or, among others) can communicate with a second apparatus 1710 (e.g. a UE, a base station and /or, among others) via a first link (for example, a direct link) and a second link (for example, a direct link or an indirect link), as described elsewhere in this document.
[00154] [00154] As shown by reference number 1715, upon detecting a first link beam failure, the first device 1705 may transmit a BFRR, indicating the first link beam failure, via a second link from the first device 1705, as described elsewhere in this document. The second apparatus 1710 can receive the BFRR via the second link.
[00155] [00155] As shown by reference number 1720, based at least in part on receiving the BFRR via the second link, the second apparatus 1710 may transmit an acknowledgment (ACK) via the second link to the first apparatus 1705. In some In these aspects, the first apparatus 1705 can prepare for a beam failure recovery procedure and/or data communication based at least in part on receiving the ACK (e.g., by reserving one or more resources). Additionally or alternatively, if the first apparatus 1705 does not receive an ACK (e.g., within a specified period of time), the first apparatus 1705 may retransmit the BFRR (e.g., for a predetermined number of retransmissions) and/or may enter in sleep mode (for example, after retransmitting the BFRR a maximum number of times).
[00156] [00156] In some aspects, if the second apparatus 1710 fails to properly receive the BFRR, the second apparatus 1710 may transmit a negative acknowledgment (NACK). In this case, the first apparatus 1705 may retransmit the BFRR (e.g., for a predetermined number of retransmissions) and/or may enter sleep mode (e.g., after retransmitting the BFRR a maximum number of times). In some aspects, the first apparatus 1705 and/or the second apparatus 1710 may transmit ACK/NACK feedback in connection with one or more other messages described herein (e.g., messages transmitted via the second link). In this way, the reliability of such messages can be improved.
[00157] [00157] As shown by the reference number 1725, the first apparatus 1705 and the second apparatus 1710 can recover a failed link by performing a beam failure recovery procedure, as described in more detail elsewhere in this document. In this way, the features of the first device
[00158] [00158] As indicated above, Fig. 17 is provided merely as an example. Other examples are possible and may differ from what has been described in relation to Fig. 17.
[00159] [00159] Fig. 18 is a diagram illustrating an example process 1800 performed, for example, by an apparatus, in accordance with various aspects of the present disclosure. Illustrative process 1800 is an example where an apparatus (e.g., a first apparatus, such as one or more UEs described herein, one or more base stations described herein, and/or, among others) uses a second link for retrieval. beam failure of a first link.
[00160] [00160] As shown in Fig. 18, in some aspects, process 1800 may include detecting, by a first apparatus, a beam failure of a first link between the first apparatus and a second apparatus (block 1810). For example, the first apparatus can detect a beam failure of a first link between the first apparatus and a second apparatus, as described above in connection with Figs. 6 to 17.
[00161] [00161] As shown further in Fig. 18, in some respects the process 1800 may include transmitting, by the first apparatus, a beam failure recovery request indicating the beam failure of the first link, where the failure recovery request beam is transmitted via a second link from the first device (block 1820). For example, the first apparatus may transmit, via a second link of the first apparatus, a beam failure recovery request indicating the beam failure of the first link, as described above in connection with Figs. 6 to 17.
[00162] [00162] As shown further in Fig. 18, in some aspects, process 1800 may include performing, by the first apparatus, a beam failure recovery procedure to select one or more beams for communication between the first apparatus and the second apparatus. device, based at least in part, on transmitting the beam failure recovery request via the second link (block 1830). For example, the first apparatus may perform a beam failure recovery procedure to select one or more beams for communication between the first apparatus and the second apparatus, as described above in connection with Figs. 6 through 17. In some respects, the first apparatus may perform the beam failure recovery procedure based, at least in part, on transmitting the beam failure recovery request via the second link.
[00163] [00163] In some respects, the first link and the second link use the same frequency band. In some respects, the frequency band is a millimeter wave frequency band. In some aspects, the first link uses a first frequency band and the second link uses a second frequency band. In some respects, the first frequency band is a millimeter wave frequency band and the second frequency band is a frequency band below 6 gigahertz.
[00164] [00164] In some respects, the second link is an indirect link between the first device and a third device that relays the beam failure recovery request to the second device. In some respects, the second link is a direct link between the first device and the second device. In some respects, the second link includes at least one of: an unwired link, a wired link, or some combination thereof.
[00165] [00165] In some respects, beam failure is a complete failure of all service control channels associated with the first apparatus. In some respects, beam failure is a partial failure of a subset of service control channels associated with the first apparatus.
[00166] [00166] In some aspects, the first handset and the second handset are connected with the same base station. In some aspects, the beam failure recovery request is transmitted to the base station, via the second link, for retransmission to the second device. In some respects, the first link and second link use a millimeter wave frequency band. In some respects, the first link uses a millimeter wave frequency band and the second link uses a frequency band below 6 gigahertz.
[00167] [00167] In some aspects, the first handset is connected to a first base station and the second handset is connected to a second base station. In some aspects, the beam failure recovery request is transmitted to the first base station via the second link to relay to the second device via the second base station. In some aspects, the first base station and the second base station are connected via at least one of: an unwired connection, a wired connection, or some combination thereof.
[00168] [00168] In some respects, the first link uses a millimeter wave frequency band and the second link is between the first device and the second device and uses a frequency band below 6 gigahertz. In some respects, the first device is a user equipment and the second device is a base station.
[00169] [00169] In some respects, the first link uses a millimeter wave frequency band and the second link is between the first device and a third device and uses a frequency band below 6 gigahertz. In some aspects, the beam failure recovery request is transmitted to the third device for retransmission to the second device. In some aspects, the first apparatus is a user equipment, the second apparatus is a first base station, and the third apparatus is a second base station.
[00170] [00170] In some respects, the first device is a first user device and the second device is a second user device. In some respects, the first device is a user equipment and the second device is a base station. In some aspects, the first apparatus is a first base station and the second apparatus is a second base station.
[00171] [00171] In some respects, performing the beam failure recovery procedure comprises: measuring multiple reference signals received from the second apparatus in multiple beams, where the beam failure recovery request triggers the transmission of the various reference signals ; and selecting the one or more beams from the various beams based, at least in part, on measuring the various reference signals. In some respects, a beam management setting, which indicates one or more resources associated with performing the beam failure recovery procedure, is communicated via the second link.
[00172] [00172] In some aspects, performing a beam failure recovery procedure comprises: receiving an indication of one or more resources to be used for transmission of various reference signals by the first device; transmit the various reference signals using the one or more resources; and receiving an indication of the one or more beams to be used for communication between the first apparatus and the second apparatus based, at least in part, on the transmission of the various reference signals.
[00173] [00173] In some respects, the beam failure recovery request indicates the one or more beams to be used for communication between the first device and the second device. In some respects, the one or more bundles include at least one of: an uplink bundle, a downlink bundle, or an uplink bundle and a downlink bundle. In some respects, the beam failure is an uplink beam failure. In some respects, the Beam Fail Recovery request indicates that the Beam Fail Recovery procedure must be performed to recover an uplink beam. In some respects, the beam failure recovery request indicates that the second link or a third link should be used for uplink communications.
[00174] [00174] In some respects, a subsequent beam failure recovery procedure must be programmed or the first link must be deactivated based, at least in part, on a determination that the beam failure recovery procedure has failed. In some respects, negative acknowledgment/acknowledgement (ACK/NACK) feedback must be received in connection with transmitting the beam failure recovery request.
[00175] [00175] Although Fig. 18 shows examples of blocks of process 1800, in some aspects, process 1800 may include additional blocks, fewer blocks, different blocks or blocks arranged differently from those shown in Figure 18. Additionally or alternatively, two or more of the 1800 process blocks may run in parallel.
[00176] [00176] Fig. 19 is a diagram illustrating an illustrative process 1900 performed, for example, by an apparatus, in accordance with various aspects of the present disclosure. Illustrative process 1900 is an example where an apparatus (e.g., a second apparatus, such as one or more UEs described herein, one or more base stations described herein, and/or, among others) uses a second link for retrieval. beam failure of a first link.
[00177] [00177] As shown in Fig. 19, in some aspects, the 1900 process may include receiving, from a first apparatus, a beam failure recovery request indicating a beam failure of a first link between the first apparatus and a second device, where the beam failure recovery request is received via a second link from the second device (block 1910). For example, the second device may receive, from the first device and via the second link, a beam failure recovery request indicating a beam failure of the first link between the first device and the second device, as described above in connection with Figs. 6 to
[00178] [00178] As shown further in Fig. 19, in some aspects, process 1900 may include initiating, by the second apparatus, a beam failure recovery procedure to select one or more beams for communication between the first apparatus and the second apparatus. device, based at least in part on receiving the beam failure recovery request via the second link (block 1920). For example, the second apparatus may initiate a beam failure recovery procedure to select one or more beams for communication between the first apparatus and the second apparatus, as described above in connection with Figs. 6 through 17. In some respects, the second device may initiate the beam failure recovery procedure based, at least in part, on receipt of the beam failure recovery request via the second link.
[00179] [00179] Although Fig. 19 shows illustrative blocks of process 1900, in some aspects, process 1900 may include additional blocks, fewer blocks, different blocks, or blocks arranged differently than those depicted in Figure 19. Additionally or alternatively, two or more of the 1900 process blocks can run in parallel.
[00180] [00180] The preceding disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations are possible in light of the above disclosure or may be gained from practicing the aspects.
[00181] [00181] As used in this document, the term component is intended to be broadly interpreted as hardware, firmware, or a combination of hardware and software. As used in this document, a processor is implemented in hardware, firmware, or a combination of hardware and software.
[00182] [00182] Some aspects are described in this document in connection with limits. As used in this document, satisfying a limit may refer to a value greater than the limit, greater than or equal to the limit, less than the limit, less than or equal to the limit, equal to the limit, not equal to the limit, and/or , among others.
[00183] [00183] It will be apparent that the systems and/or methods described in this document may be implemented in different forms of hardware, firmware, or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and/or methods is not aspect limiting. Thus, the operation and behavior of systems and/or methods have been described in this document without reference to specific software code - it being understood that software and hardware may be designed to implement systems and/or methods based on, at least part in the description of this document.
[00184] [00184] Although particular combinations of features are recited in the claims and/or disclosed in the specification, these combinations are not intended to limit the disclosure of possible aspects. In fact, several of these characteristics may be combined in ways not specifically cited in the claims and/or disclosed in the specification. While each dependent claim listed below may directly depend on only one claim, the disclosure of possible aspects includes each dependent claim in combination with all other claims in the set of claims. A phrase that refers to "at least one of" a list of items refers to any combination of those items, including unique members. As an example, "at least one of: ab or c" is intended to cover a, b, c , ab, ac, bc, and abc, as well as any combination of multiples of the same element (e.g., aa, aaa, aab, aac, abb, acc, bb, bb-b, bbc, cc, and ccc, or any other order of a, b).
[00185] [00185] No element, act or instruction used in this document should be interpreted as critical or essential, unless it is explicitly described as such. Also, as used herein, the articles "a" and "an" are intended to include one or more items and may be used interchangeably with "one or more". Additionally, as used in this document, the terms "set" and "group" are intended to include one or more items (e.g. related items, unrelated items, a combination of related and unrelated items and/or, among others) and may be used interchangeably with "one or more". Where only one item is intended, the term "a" or similar language is used.
In addition, as used in this document, the terms "owns", "have", "possessing" and/or, among others, are intended to be open.
Additionally, the phrase "based on" is intended to mean "based, at least in part, on", unless explicitly stated otherwise.

权利要求:
Claims (30)
[1]
1. A method of unwired communication, comprising: detecting, by a first apparatus, a beam failure of a first link between the first apparatus and a second apparatus; transmitting, by the first apparatus, a beam failure recovery request indicating the beam failure of the first link, wherein the beam failure recovery request is transmitted via a second link of the first apparatus; and performing, by the first apparatus, a beam failure recovery procedure to select one or more beams for communication between the first apparatus and the second apparatus, based at least in part on transmitting the beam failure recovery request via the second link.
[2]
2. Method according to claim 1, wherein the first link and the second link use the same frequency band.
[3]
The method of claim 2, wherein the frequency band is a millimeter wave frequency band.
[4]
A method according to claim 1, wherein the first link uses a first frequency band and the second link uses a second frequency band.
[5]
The method of claim 4, wherein the first frequency band is a millimeter wave frequency band and the second frequency band is a frequency band below 6 gigahertz.
[6]
A method as claimed in claim 1, wherein the second link is an indirect link between the first apparatus and a third apparatus which relays the beam failure recovery request to the second apparatus.
[7]
A method according to claim 1, wherein the second link is a direct link between the first apparatus and the second apparatus.
[8]
A method according to claim 1, wherein the first apparatus and the second apparatus are connected to the same base station.
[9]
A method according to claim 1, wherein the first apparatus is connected with a first base station and the second apparatus is connected with a second base station.
[10]
A method according to claim 1, wherein a beam management configuration, which indicates one or more resources associated with performing the beam failure recovery procedure, is communicated via the second link.
[11]
The method of claim 1, wherein the beam failure recovery request indicates the one or more beams to be used for communication between the first apparatus and the second apparatus.
[12]
12. A method of unwired communication, comprising: receiving, from a first apparatus, a beam failure recovery request indicating a beam failure of a first link between the first apparatus and a second apparatus, wherein the request for beam failure recovery is received via a second link from the second device; and initiating, by the second device, a beam failure recovery procedure to select one or more beams for communication between the first device and the second device, based at least in part on receiving the beam failure recovery request via the second link.
[13]
A method according to claim 12, wherein the first link and the second link use the same frequency band.
[14]
The method of claim 12, wherein the first link uses a first frequency band and the second link uses a second frequency band.
[15]
A method according to claim 12, wherein the first link and the second link use a millimeter wave frequency band, or wherein the first link uses a millimeter wave frequency band and the second link uses a millimeter wave frequency band. frequencies below 6 gigahertz.
[16]
16. First apparatus for non-wired communication, comprising: a memory; and one or more processors operatively coupled with the memory, the memory and the one or more processors configured to: detect a beam failure of a first link between the first apparatus and a second apparatus; transmitting a beam failure recovery request indicating the beam failure of the first link, wherein the beam failure recovery request is transmitted via a second link of the first apparatus; and performing a beam failure recovery procedure to select one or more beams for communication between the first apparatus and the second apparatus, based, at least in part, on transmitting the beam failure recovery request via the second link.
[17]
A first apparatus according to claim 16, wherein the first link and the second link use the same frequency band.
[18]
A first apparatus according to claim 17, wherein the frequency band is a millimeter wave frequency band.
[19]
The first apparatus of claim 16, wherein the first link uses a first frequency band and the second link uses a second frequency band.
[20]
The first apparatus of claim 19, wherein the first frequency band is a millimeter wave frequency band and the second frequency band is a frequency band below 6 gigahertz.
[21]
The first apparatus according to claim 16, wherein the second link is an indirect link between the first apparatus and a third apparatus which relays the beam failure recovery request to the second apparatus.
[22]
The first apparatus according to claim 16, wherein the second link is a direct link between the first apparatus and the second apparatus.
[23]
A first apparatus according to claim 16, wherein the first apparatus and the second apparatus are connected to the same base station.
[24]
The first apparatus according to claim 16, wherein the first apparatus is connected with a first base station and the second apparatus is connected with a second base station.
[25]
The first apparatus according to claim 16, wherein a beam management configuration, which indicates one or more features associated with performing the beam failure recovery procedure, is communicated via the second link.
[26]
The first apparatus as claimed in claim 16, wherein the beam failure recovery request indicates the one or more beams to be used for communication between the first apparatus and the second apparatus.
[27]
27. A second apparatus for unwired communication, comprising: a memory; and one or more processors operatively coupled with the memory, the memory and the one or more processors configured to: receive, from a first apparatus, a beam failure recovery request indicating a beam failure of a first link between the the first apparatus and the second apparatus, wherein the beam failure recovery request is received via a second link of the second apparatus; and initiating a beam failure recovery procedure to select one or more beams for communication between the first device and the second device, based at least in part on receiving the beam failure recovery request via the second link.
[28]
A second apparatus according to claim 27, wherein the first link and the second link use the same frequency band.
[29]
A second apparatus according to claim 27, wherein the first link uses a first frequency band and the second link uses a second frequency band.
[30]
A second apparatus according to claim 27, wherein the first link and the second link use a millimeter wave frequency band, or wherein the first link uses a millimeter wave frequency band and the second link uses a millimeter wave frequency band. frequency band below 6 gigahertz.

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WO2021056013A1|2021-03-25|Beam failure recovery request multiplexing for secondary cells

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WO2021072442A1|2021-04-15|Medium access control | control element handling for multicast or broadcast operation

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BR112020011784A2|2020-11-24|reliable low-latency operations on time division duplexing unwired communication systems

同族专利:

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公开号 | 公开日

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US20190110281A1|2019-04-11|

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EP3692768B1|2021-07-07|

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ES2882798T3|2021-12-02|

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WO2019070437A1|2019-04-11|

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CN111165066A|2020-05-15|

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TW201924254A|2019-06-16|

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EP3692768A1|2020-08-12|

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法律状态:
2021-11-23| B350| Update of information on the portal [chapter 15.35 patent gazette]|

优先权:

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申请号 | 申请日 | 专利标题

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US201762569002P| true| 2017-10-06|2017-10-06|

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US62/569,002|2017-10-06|

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US16/138,545|2018-09-21|

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US16/138,545|US20190110281A1|2017-10-06|2018-09-21|Techniques and apparatuses for using a second link for beam failure recovery of a first link|

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PCT/US2018/052454|WO2019070437A1|2017-10-06|2018-09-24|Techniques and apparatuses for using a second link for beam failure recovery of a first link|

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