WO2020048443A1 - Appareil et procédé de rétablissement après défaillance de faisceau - Google Patents

Appareil et procédé de rétablissement après défaillance de faisceau Download PDF

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Publication number
WO2020048443A1
WO2020048443A1 PCT/CN2019/104165 CN2019104165W WO2020048443A1 WO 2020048443 A1 WO2020048443 A1 WO 2020048443A1 CN 2019104165 W CN2019104165 W CN 2019104165W WO 2020048443 A1 WO2020048443 A1 WO 2020048443A1
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WIPO (PCT)
Prior art keywords
bfrq
pucch
bfr
pucch resource
candidate beams
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PCT/CN2019/104165
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English (en)
Inventor
Yushu Zhang
Gang Xiong
Guotong Wang
Alexei Davydov
Qian Li
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Intel Corporation
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Application filed by Intel Corporation filed Critical Intel Corporation
Priority to EP19856599.6A priority Critical patent/EP3847861A4/fr
Publication of WO2020048443A1 publication Critical patent/WO2020048443A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/088—Hybrid systems, i.e. switching and combining using beam selection

Definitions

  • Embodiments of the present disclosure generally relate to wireless communications, and in particular to an apparatus and a method for beam failure recovery.
  • This disclosure will provide solutions for beam failure recovery (BFR) and other related solutions.
  • An aspect of the disclosure provides an apparatus for a user equipment (UE) , comprising: a radio frequency (RF) interface to receive beam failure recovery request (BFRQ) resource configuration information; and processor circuitry coupled with the RF interface, wherein the processor circuitry is to: determine a physical uplink control channel (PUCCH) resource unit for a BFRQ of a beam failure recovery (BFR) procedure based on the BFRQ resource configuration information received from the RF interface, wherein the BFRQ is to only indicate that beam failure happens; and cause transmission of the BFRQ via the PUCCH resource unit.
  • a radio frequency (RF) interface to receive beam failure recovery request (BFRQ) resource configuration information
  • PUCCH physical uplink control channel
  • BFR beam failure recovery
  • An aspect of the disclosure provide one or more computer-readable media having instructions stored thereon, the instructions when executed by processor circuitry cause the processor circuitry to: determine a physical uplink control channel (PUCCH) resource unit for a beam failure recovery request (BFRQ) of a beam failure recovery (BFR) procedure based on BFRQ resource configuration information received from an access node, wherein the BFRQ is to only indicate that beam failure happens; cause transmission of the BFRQ via the PUCCH resource unit to the access node; encode new beam identification (NBI) resource configuration information, which is transmitted from the access node after reception of the BFRQ by the access node; and determine one or more PUCCH resource units for transmission of one or more new candidate beams based on the NBI resource configuration information received from the access node, wherein short PUCCH or long PUCCH is configured for the one or more PUCCH resource units.
  • PUCCH physical uplink control channel
  • BFRQ beam failure recovery request
  • BFR beam failure recovery
  • An aspect of the disclosure provides an apparatus for a UE, comprising: a RF interface to receive BFR resource configuration information; and processor circuitry coupled with the RF interface, wherein the processor circuitry is to: determine one or more PUCCH resource units for a BFRQ of a BFR procedure based on the BFR resource configuration information received from the RF interface; identify one or more new candidate beams when beam failure happens; encode the BFRQ with the one or more new candidate beams; and cause transmission of the BFRQ via the one or more PUCCH resource units.
  • Fig. 1 illustrates a communication system in accordance with some embodiments of the disclosure.
  • Fig. 2 illustrates a schematic diagram showing a beam failure recovery (BFR) mechanism in accordance with some embodiments of the disclosure.
  • Fig. 3 illustrates a flowchart of a method for a PUCCH-based BFR procedure in accordance with some embodiments of the disclosure.
  • Fig. 4 illustrates a flowchart of a method for a PUCCH-based BFR procedure in accordance with some other embodiments of the disclosure.
  • Fig. 5 illustrates a schematic diagram showing an example of multiple transmission reception point (multi-TRP) operation in accordance with some embodiments of the disclosure.
  • Fig. 6 illustrates a schematic diagram showing a link specific BFR mechanism in accordance with some embodiments of the disclosure.
  • Fig. 7 illustrates a flowchart of a method for beam failure detection (BFD) in multi-TRP operation in accordance with some embodiments of the disclosure.
  • Fig. 8 illustrates a flowchart of a method for new beam identification (NBI) in multi-TRP operation in accordance with some embodiments of the disclosure.
  • Fig. 9 illustrates a flowchart of a method for transmission of beam failure recovery request (BFRQ) and BFR response in multi-TRP operation in accordance with some embodiments of the disclosure.
  • Fig. 10 illustrates example components of a device in accordance with some embodiments of the disclosure.
  • Fig. 11 illustrates example interfaces of baseband circuitry in accordance with some embodiments of the disclosure.
  • Fig. 12 is a block diagram illustrating components, according to some example embodiments, able to read instructions from a machine-readable or computer-readable medium and perform any one or more of the methodologies discussed herein.
  • the BFR mechanism may include beam failure detection (BFD) , new beam identification (NBI) , beam failure recovery request (BFRQ) , and BFR response.
  • BFD may be used to discover beam failure, which is based on measurement of downlink reference signal.
  • NBI may be used to identify a new beam whose quality is above a threshold when beam failure happens.
  • BFRQ may be used to inform the access network side (e.g., next generation NodeB (gNB) ) that beam failure happens as well as a new beam information is requested from a user equipment (UE) .
  • BFR response is used to inform the UE that BFRQ is received by the gNB and new beam will be applied.
  • the BFR mechanism may include a physical random access channel (PRACH) -based BFR mechanism.
  • PRACH physical random access channel
  • the BFRQ may be carried by the PRACH, and new beam index (s) may be implicitly indicated by PRACH resource index (s) .
  • the overhead for the PRACH-based BFR mechanism could be an issue, since the gNB needs to reserve many PRACH resources in order for the UE to search more new candidate beams.
  • PUCCH physical uplink control channel
  • the BFR mechanism mentioned in 3GPP Rel-15 is directed to single transmission reception point (TRP) operation.
  • TRP single transmission reception point
  • Embodiments for a BFR mechanism in multi-TRP operation will be described herein.
  • embodiments related to link specific BFD, link specific NBI, BFRQ in the multi-TRP operation, BFR response, and link recovery will be discussed.
  • Fig. 1 illustrates a communication system 100 in accordance with some embodiments of the disclosure.
  • the communication system 100 is shown to include a user equipment (UE) 101.
  • the UE 101 may be a smartphone (e.g., a handheld touchscreen mobile computing device connectable to one or more cellular networks) .
  • it may also include any mobile or non-mobile computing device, such as a personal data assistant (PDA) , a tablet, a pager, a laptop computer, a desktop computer, a wireless handset, or any computing device including a wireless communications interface.
  • PDA personal data assistant
  • the UE 101 may include an Internet of Things (IoT) UE, which may include a network access layer designed for low-power IoT applications utilizing short-lived UE connections.
  • An IoT UE may utilize technologies such as machine-to-machine (M2M) , machine-type communications (MTC) , enhance MTC (eMTC) , and narrow band IoT (NB-IoT) for exchanging data with an IoT server or device via a public land mobile network (PLMN) , Proximity-Based Service (ProSe) or device-to-device (D2D) communication, sensor networks, or IoT networks.
  • M2M or MTC exchange of data may be a machine-initiated exchange of data.
  • An IoT network describes interconnecting IoT UEs, which may include uniquely identifiable embedded computing devices (within the Internet infrastructure) , with short-lived connections.
  • the IoT UEs may execute background applications (e.g., keep-alive messages, status updates, etc. ) to facilitate the connections of the IoT network.
  • the UE 101 may be configured to connect, e.g., communicatively couple, with a radio access network (RAN) 110, which may be, for example, an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN) , a NextGen RAN (NG RAN) , or some other type of RAN.
  • RAN radio access network
  • UMTS Evolved Universal Mobile Telecommunications System
  • E-UTRAN Evolved Universal Mobile Telecommunications System
  • NG RAN NextGen RAN
  • the UE 101 may operate in consistent with cellular communications protocols, such as a Global System for Mobile Communications (GSM) protocol, a Code-Division Multiple Access (CDMA) network protocol, a Push-to-Talk (PTT) protocol, a PTT over Cellular (POC) protocol, a Universal Mobile Telecommunications System (UMTS) protocol, a 3GPP Long Term Evolution (LTE) protocol, a fifth generation (5G) protocol, a New Radio (NR) protocol, and the like.
  • GSM Global System for Mobile Communications
  • CDMA Code-Division Multiple Access
  • PTT PTT over Cellular
  • UMTS Universal Mobile Telecommunications System
  • LTE Long Term Evolution
  • 5G fifth generation
  • NR New Radio
  • the RAN 110 may include one or more access nodes (ANs) .
  • ANs access nodes
  • These ANs may be referred to as base stations (BSs) , NodeBs, evolved NodeBs (eNBs) , next Generation NodeBs (gNBs) , transmission reception point (TRP) , remote radio head (RRH) , and so forth, and may include ground stations (e.g., terrestrial access points) or satellite stations providing coverage within a geographic area (e.g., a cell) .
  • BSs base stations
  • eNBs evolved NodeBs
  • gNBs next Generation NodeBs
  • TRP transmission reception point
  • RRH remote radio head
  • the RAN 110 includes AN 111 and AN 112.
  • the UE 101 may enable communicative coupling with the RAN 110 by utilizing connection 103 with AN 111, as shown in Fig. 1.
  • the connection 103 may be implemented with one or more beams (not shown) .
  • a beam may indicate a spatial domain transmission and/or reception filter or spatial relation, thus, term “beam” , “spatial domain transmission and/or reception filter” and “spatial relation” may be interchangeable herein.
  • the AN 111 and AN 112 may communicate with one another via an X2 interface 113.
  • the AN 111 and AN 112 may be macro ANs which may provide lager coverage. Alternatively, they may be femtocell ANs or picocell ANs, which may provide smaller coverage areas, smaller user capacity, or higher bandwidth compared to a macro AN.
  • one or both of the AN 111 and AN 112 may be a low power (LP) AN.
  • the AN 111 and AN 112 may be the same type of AN. In another embodiment, they are different types of ANs.
  • the AN 111 may terminate the air interface protocol and may be the first point of contact for the UE 101.
  • the ANs 111 and 112 may fulfill various logical functions for the RAN 110 including, but not limited to, radio network controller (RNC) functions such as radio bearer management, uplink and downlink dynamic radio resource management and data packet scheduling, and mobility management.
  • RNC radio network controller
  • the UE 101 may be configured to communicate using Orthogonal Frequency-Division Multiplexing (OFDM) communication signals with the AN 111or with other UEs over a multicarrier communication channel in accordance various communication techniques, such as, but not limited to, an Orthogonal Frequency-Division Multiple Access (OFDMA) communication technique (e.g., for downlink communications) or a Single Carrier Frequency Division Multiple Access (SC-FDMA) communication technique (e.g., for uplink and Proximity-Based Service (ProSe) or sidelink communications) , although the scope of the embodiments is not limited in this respect.
  • OFDM signals can include a plurality of orthogonal subcarriers.
  • a downlink resource grid may be used for downlink transmissions from the AN 111 to the UE 101, while uplink transmissions may utilize similar techniques.
  • the grid may be a time-frequency grid, called a resource grid or time-frequency resource grid, which is the physical resource in the downlink in each slot.
  • a time-frequency plane representation is a common practice for OFDM systems, which makes it intuitive for radio resource allocation.
  • Each column and each row of the resource grid corresponds to one OFDM symbol and one OFDM subcarrier, respectively.
  • the duration of the resource grid in the time domain corresponds to one slot in a radio frame.
  • the smallest time-frequency unit in a resource grid is denoted as a resource element.
  • Each resource grid comprises a number of resource blocks, which describe the mapping of certain physical channels to resource elements.
  • Each resource block comprises a collection of resource elements; in the frequency domain, this may represent the smallest quantity of resources that currently can be allocated.
  • Downlink channels may include a physical downlink shared channel (PDSCH) and a physical downlink control channel (PDCCH) .
  • PDSCH physical downlink shared channel
  • PDCCH physical downlink control channel
  • the PDSCH may carry user data and higher-layer signaling to the UE 101.
  • the PDCCH may carry information about the transport format and resource allocations related to the PDSCH channel, among other things. It may also inform the UE 101 about the transport format, resource allocation, and Hybrid Automatic Repeat Request (HARQ) information related to the uplink shared channel.
  • HARQ Hybrid Automatic Repeat Request
  • downlink scheduling (assigning control and shared channel resource blocks to the UE 101 within a cell) may be performed at the AN 111 based on channel quality information fed back from the UE 101.
  • the downlink resource assignment information may be sent on the PDCCH used for (e.g., assigned to) the UE 101.
  • the PDCCH may use control channel elements (CCEs) to convey the control information.
  • CCEs control channel elements
  • the PDCCH complex-valued symbols may first be organized into quadruplets, which may then be permuted using a sub-block interleaver for rate matching.
  • Each PDCCH may be transmitted using one or more of these CCEs, where each CCE may correspond to nine sets of four physical resource elements known as resource element groups (REGs) .
  • Four Quadrature Phase Shift Keying (QPSK) symbols may be mapped to each REG.
  • the PDCCH can be transmitted using one or more CCEs, depending on the size of the downlink control information (DCI) and the channel condition.
  • DCI downlink control information
  • There may be four or more different PDCCH formats defined in LTE with different numbers of CCEs (e.g., aggregation level, L 1, 2, 4, or 8)
  • Some embodiments may use concepts for resource allocation for control channel information that are an extension of the above-described concepts. For example, some embodiments may utilize an enhanced physical downlink control channel (EPDCCH) that uses PDSCH resources for control information transmission.
  • the EPDCCH may be transmitted using one or more enhanced control channel elements (ECCEs) . Similar to above, each ECCE may correspond to nine sets of four physical resource elements known as an enhanced resource element groups (EREGs) . An ECCE may have other numbers of EREGs in some situations.
  • EECCE enhanced control channel elements
  • Uplink channels may include a physical uplink shared channel (PUSCH) and a physical uplink control channel (PUCCH) .
  • the PUSCH may carry user data and control information to the AN(s)
  • the PUCCH may carry control information to the AN (s) .
  • the RAN 110 is shown to be communicatively coupled to a core network (CN) 120 via a S1 interface 114.
  • the CN 120 may be an evolved packet core (EPC) network, a NextGen Packet Core (NPC) network, or some other type of CN.
  • EPC evolved packet core
  • NPC NextGen Packet Core
  • the S1 interface 114 is split into two parts: the S1-mobility management entity (MME) interface 115, which is a signaling interface between the ANs 111 and 112 and MMEs 121; and the S1-U interface 116, which carries traffic data between the ANs 111 and 112 and a serving gateway (S-GW) 122.
  • MME S1-mobility management entity
  • S-GW serving gateway
  • the CN 120 may comprise the MMEs 121, the S-GW 122, a Packet Data Network (PDN) Gateway (P-GW) 123, and a home subscriber server (HSS) 124.
  • the MMEs 121 may be similar in function to the control plane of legacy Serving General Packet Radio Service (GPRS) Support Nodes (SGSN) .
  • the MMEs 121 may manage mobility aspects in access such as gateway selection and tracking area list management.
  • the HSS 124 may comprise a database for network users, including subscription-related information to support the network entities’ handling of communication sessions.
  • the CN 120 may comprise one or several HSSs 124, depending on the number of mobile subscribers, on the capacity of the equipment, on the organization of the network, etc.
  • the HSS 124 can provide support for routing/roaming, authentication, authorization, naming/addressing resolution, location dependencies, etc.
  • the S-GW 122 may terminate the S1 interface 114 towards the RAN 110, and routes data packets between the RAN 110 and the CN 120.
  • the S-GW 122 may be a local mobility anchor point for inter-AN handovers and also may provide an anchor for inter-3GPP mobility. Other responsibilities may include lawful intercept, charging, and some policy enforcement.
  • the P-GW 123 may terminate a SGi interface toward a PDN.
  • the P-GW 123 may route data packets between the CN 120 and external networks such as a network including an application server (AS) 130 (alternatively referred to as application function (AF) ) via an Internet Protocol (IP) interface 125.
  • AS application server
  • AF application function
  • IP Internet Protocol
  • the application server 130 may be an element offering applications that use IP bearer resources with the core network (e.g., UMTS Packet Services (PS) domain, LTE PS data services, etc. ) .
  • the P-GW 123 is communicatively coupled to an application server 130 via an IP communications interface.
  • the application server 130 may also be configured to support one or more communication services (e.g., Voice-over-Internet Protocol (VoIP) sessions, PTT sessions, group communication sessions, social networking services, etc. ) for the UE 101 via the CN 120.
  • VoIP Voice-over-Internet Protocol
  • the P-GW 123 may further be responsible for policy enforcement and charging data collection.
  • Policy and Charging Rules Function (PCRF) 126 is a policy and charging control element of the CN 120.
  • PCRF Policy and Charging Rules Function
  • HPLMN Home Public Land Mobile Network
  • IP-CAN Internet Protocol Connectivity Access Network
  • HPLMN Home Public Land Mobile Network
  • V-PCRF Visited PCRF
  • VPN Visited Public Land Mobile Network
  • the PCRF 126 may be communicatively coupled to the application server 130 via the P-GW 123.
  • the application server 130 may signal the PCRF 126 to indicate a new service flow and select the appropriate Quality of Service (QoS) and charging parameters.
  • the PCRF 126 may provision this rule into a Policy and Charging Enforcement Function (PCEF) (not shown) with an appropriate traffic flow template (TFT) and QoS class of identifier (QCI) , which commences the QoS and charging as specified by the application server 130.
  • PCEF Policy and Charging Enforcement Function
  • TFT traffic flow template
  • QCI QoS class of identifier
  • Fig. 1 The quantity of devices and/or networks illustrated in Fig. 1 is provided for explanatory purposes only. In practice, there may be additional devices and/or networks, fewer devices and/or networks, different devices and/or networks, or differently arranged devices and/or networks than illustrated in Fig. 1. Alternatively or additionally, one or more of the devices of system 100 may perform one or more functions described as being performed by another one or more of the devices of system 100. Furthermore, while “direct” connections are shown in Fig. 1, these connections should be interpreted as logical communication pathways, and in practice, one or more intervening devices (e.g., routers, gateways, modems, switches, hubs, etc. ) may be present.
  • intervening devices e.g., routers, gateways, modems, switches, hubs, etc.
  • Fig. 2 illustrates a schematic diagram showing a BFR mechanism 200 in accordance with some embodiments of the disclosure.
  • the AN may transmit BFR resource configuration to the UE (e.g. UE 101) .
  • the BFR resource configuration may be used to indicate PRACH resource to carry BFRQ.
  • the BFR resource configuration may be used to indicate PUCCH resource to carry BFRQ.
  • the UE may detect beam failure based on downlink reference signals (RSs) .
  • the RSs may be quasi-co-located (QCLed) with demodulation reference signal (DMRS) of PDCCH for unicast PDSCH scheduling.
  • DMRS demodulation reference signal
  • the UE may monitor quality of RSs for the beams.
  • beam failure will be declared when the quality of the beams falls below a threshold for a period of time. For example, when hypothetical block error ratio (BLER) for all beams (or all RSs) are above a threshold, beam failure instance is declared. After N beam failure instances are declared, it is determined that beam failure happens.
  • BLER block error ratio
  • the UE may use a plurality of beams to detect downlink RSs transmitted from the AN.
  • the one or more beams may be determined as the candidate beam (s) .
  • the UE may identify a beam whose quality is above a configured threshold, the beam may be identified as a candidate beam.
  • the candidate beam (s) will be informed to the AN via the BFRQ.
  • the UE may transmit a BFRQ to the AN to inform the beam failure event and/or the newly identified candidate beam (s) .
  • the BFRQ is transmitted via PRACH resources. In another embodiment based on the PUCCH-based BFR, the BFRQ is transmitted via PUCCH resources.
  • the UE may monitor the response to the BFRQ (also referred to as BFR response hereinafter) transmitted from the AN to determine whether the BFRQ is received by the AN successfully. If the BFR response is received by the UE, it is determined that the BFR is successful; otherwise, the UE may retransmit the BFRQ to the AN.
  • BFRQ also referred to as BFR response hereinafter
  • Fig. 3 illustrates a flowchart of a method 300 for a PUCCH-based BFR procedure in accordance with some embodiments of the disclosure.
  • the method 300 may be implemented by the UE.
  • the UE may determine one or more PUCCH resource units for a BFRQ of a BFR procedure based on the BFR resource configuration information received from the AN.
  • the one or more PUCCH resource units may be divided into one or more PUCCH resource sets, and the number of the one or more PUCCH resource sets may be fixed for a certain bandwidth part (BWP) or a certain component carrier (CC) .
  • BWP bandwidth part
  • CC component carrier
  • the number of PUCCH resource units within each of the one or more PUCCH resource sets may be fixed.
  • the one or more PUCCH resource units are dedicated for transmission of the BFRQ. Then the AN may identify whether a PUCCH resource unit is used for BFRQ or for other purpose based on an index of the PUCCH resource unit.
  • the one or more PUCCH resource units are used for transmission of the BFRQ or other signals, e.g., hybrid automatic repeat request (HARQ) acknowledge (ACK) (HARQ-ACK) or channel state information (CSI) feedback.
  • HARQ hybrid automatic repeat request
  • ACK acknowledge
  • CSI channel state information
  • the UE may encode an indication in uplink control information (UCI) to explicitly indicate whether the one or more PUCCH resource units are used for the BFRQ or not.
  • the AN may identify whether the PUCCH resource units are used for BFRQ or not by the explicit indication.
  • the UCI bits for this indication may be multiplexed with other UCI bits.
  • the one or more new candidate beams may be configured via the AN based on synchronization signal block (SSB) or channel state information reference signal (CSI-RS) .
  • the AN may inform the UE whether the synchronization signal in the SSB or the CSI-RS is used as RS to identify the new candidate beams.
  • the AN may indicate this independently, for example, indicate this in a dedicated indicator. Then the PUCCH beam indication parameter PUCCH-spatialRelationInfo may not be configured or the UE can ignore this parameter.
  • the AN may indicate whether the synchronization signal in the SSB or the CSI-RS is used as RS to identify the new candidate beams in the parameter PUCCH-spatialRelationInfo. Then the parameter PUCCH-spatialRelationInfo will not be based on sounding reference signal (SRS) index.
  • SRS sounding reference signal
  • the one or more new candidate beams are selected from current CC/BWP or another CC/BWP.
  • the new candidate beams can be selected per CC/BWP or across CC/BWP, which is not limited in the disclosure.
  • some PUCCH format may not be configured. Only one of PUCCH format for short PUCCH transmission (also called short PUCCH) and PUCCH format for long PUCCH transmission (also called long PUCCH) is configured for the PUCCH resource units of the BFRQ. For example, only the short PUCCH is configured and the long PUCCH is not configured.
  • both long PUCCH and short PUCCH are configured for the PUCCH resource units of the BFRQ.
  • the long PUCCH format may be used for a coverage-limited case.
  • BFR parameters may be configured.
  • the example provides M sets PUCCH resource, i.e., PUCCH resource set 1, PUCCH resource set 2, ...PUCCH resource set M, for example.
  • N PUCCH resource units i.e., PUCCH resource 1, PUCCH resource 2, ...PUCCH resource N, are included, for example.
  • parameters may include, but be not limited to, resource ID, CSI-RS/SSB for NBI, PUCCH format, starting physical resource block (PRB) , and the like.
  • the UE may identify one or more new candidate beams when beam failure happens.
  • the UE may encode the BFRQ with the one or more new candidate beams. In other words, the BFRQ may not only indicate that beam fail happens, but also may provide the one or more new candidate beams.
  • the UE may transmit the BFRQ via the one or more PUCCH resource units.
  • the UE may encode an index of at least one of the one or more new candidate beams in the one or more PUCCH resource units.
  • index (s) of new candidate beam (s) may be carried in the BFRQ via the one or more PUCCH resource units.
  • the AN may select a new beam from the new candidate beam (s) .
  • the AN may select the first beam reported in the BFRQ.
  • the UE may encode a beam quality indicator of at least one of the one or more new candidate beams in the one or more PUCCH resource units.
  • beam quality indicator (s) of new candidate beam (s) may be carried in the BFRQ via the one or more PUCCH resource units.
  • each of the beam quality indicator (s) of the new candidate beam (s) is transmitted in a corresponding one of the one or more PUCCH resource units.
  • Mapping relationship between each of the new candidate beams and the corresponding PUCCH resource unit is known at the AN.
  • the AN may select a new beam based on corresponding PUCCH resource unit.
  • the AN may select a new beam with the highest beam quality reported in the BFRQ.
  • the UE may encode both of an index and a beam quality indicator of at least one of the one or more new candidate beams in the one or more PUCCH resource units.
  • index (s) of new candidate beam (s) and corresponding beam quality indicator (s) may be carried in the BFRQ via the one or more PUCCH resource units.
  • the AN may select a new beam with the highest beam quality reported in the BFRQ.
  • the beam quality indicator may include, but not limited to, Layer 1 reference signal receiving power (L1-RSRP) , Layer 1 signal to interference plus noise (L1-SINR) or Layer 1 reference signal receiving quality (L1-RSRQ) .
  • L1-RSRP Layer 1 reference signal receiving power
  • L1-SINR Layer 1 signal to interference plus noise
  • L1-RSRQ Layer 1 reference signal receiving quality
  • payload size of the BFRQ in the PUCCH-based BFR procedure may be predefined in the specification or configured by higher layers.
  • N_max indexes and/or beam quality indicators of corresponding new candidate beams may be encoded in the BFRQ, where N_max is a positive integer, e.g., N_max > 1.
  • the value of N_max may be predefined or configured by higher layer signaling.
  • the AN may transmit a BFR response based on a dedicatedly configured search space for BFR (SS-BFR) in K slots after reception of the BFRQ.
  • the SS-BFR is QCLed with a new beam among the one or more new candidate beams, and the new beam may be determined based on a predefined rule. For example, this new beam may be determined as a beam identified based on an index of each of the one or more PUCCH resource units, a beam with highest quality reported in the BFRQ, or the first beam reported in the BFRQ, which is described above.
  • the UE may retransmit the BFRQ when the response to the BFRQ is not received within a time window.
  • the time window may be predefined or configured by higher layer signaling.
  • the UE is allowed to perform up to a number of retransmission of the BFRQ. The number of retransmission may be predefined or configured by higher layer signaling.
  • Some embodiments related to the PUCCH-based BFR mechanism have been discussed above. However, these embodiments are directed to the BFRQ carrying information not only about the beam failure event itself but also new candidate beams. Below, embodiments related to a BFRQ which only indicates the beam failure event itself will be described.
  • Fig. 4 illustrates a flowchart of a method 400 for a PUCCH-based BFR procedure in accordance with some other embodiments of the disclosure.
  • the UE may determine a PUCCH resource unit for a BFRQ based on BFRQ resource configuration information received from the AN.
  • the BFRQ is configured to only indicate that beam failure happens. In other words, the UE will not report new candidate beams in the BFRQ according to the embodiment.
  • the UE may transmit the BFRQ via the PUCCH resource unit.
  • the PUCCH resource unit is dedicated for transmission of the BFRQ.
  • PUCCH format 0 or PUCCH format 1 carrying scheduling request (SR) is used for indication of the BFRQ.
  • SR scheduling request
  • a dedicated SR-like PUCCH resource is used for indication of the BFRQ.
  • the method 400 may further include receiving NBI resource configuration information from the AN, and determining one or more PUCCH resource units for transmission of one or more new candidate beams based on the NBI resource configuration information.
  • the NBI resource configuration information is transmitted from the AN after reception of the BFRQ by the AN.
  • the UE may first inform the AN that beam failure happens, then the AN may schedule PUCCH resource for the UE to report new candidate beams.
  • the one or more PUCCH resource units for transmission of one or more new candidate beams in these embodiments may be configured in the same or similar way as that in the above embodiments where the BFRQ carries information not only about the beam failure event itself but also new candidate beams.
  • short PUCCH and/or long PUCCH may be configured for the one or more PUCCH resource units.
  • the one or more new candidate beams may be configured based on SSB or CSI-RS via the AN.
  • the one or more new candidate beams may be indicated in a dedicated indicator. In another embodiment, the one or more new candidate beams may be indicated in the PUCCH beam indication parameter (PUCCH-spatialRelationInfo) .
  • PUCCH-spatialRelationInfo PUCCH beam indication parameter
  • the index or beam quality indicator of at least one of the one or more new candidate beams may be encoded in the one or more PUCCH resource units.
  • the beam quality indicator may include but not limited to L1-RSRP, L1-SINR or L1-RSRQ.
  • the beam quality indicator is predefined or configured by higher layer signaling.
  • the upper limit for a number of indexes or beam quality indicators of corresponding ones of the one or more new candidate beams that are carried in the one or more PUCCH resource units is predefined or configured by higher layer signaling.
  • the UE may monitor a dedicated SS-BFR a number of slots after the transmission of the one or more new candidate beams, for reception of a response to the BFRQ.
  • the number of slots may be predefined or configured by higher layer signaling.
  • the SS-BFR may be QCLed with a new beam among the one or more new candidate beams, and the new beam may be determined to be a beam identified based on a predefined rule.
  • the new beam may be determined as: a beam identified based on an index of each of the one or more PUCCH resource units; a beam with highest quality reported in the one or more PUCCH resource units; or a first beam reported in the one or more PUCCH resource units.
  • a UE may communicate with more than one AN with different beams from different panels.
  • the multiple-link scenario may also be known as multi-AN operation.
  • transmission reception point TRP
  • transmission reception point eNB, gNB, RRH
  • multi-TRP operation is only an example for multiple links scenario, and other AN, e.g., eNB, gNB, RRH, may also be involved. The disclosure is not limited in this respect.
  • Fig. 5 illustrates a schematic diagram showing an example of multi-TRP operation 500 in accordance with some embodiments of the disclosure.
  • the UE may communicate to TRP1 with beams in Panel 1 and communicate to TRP2 with beams in Panel 2.
  • the two TPRs may be connected based on ideal backhaul or non-ideal backhaul. If the two TRPs are connected based on non-ideal backhaul, they may transmit the PDCCH to the UE to schedule uplink/downlink transmission independently as they may not be able to coordinate well. Then if beam failure happens in one link between one TRP and the UE, the PDCCH performance for this TRP will be not guaranteed. Due to non-ideal backhaul, the other TRP cannot discover this beam failure event immediately. Thus how to recover from beam failure for one link in multi-TRP operation could be one issue.
  • Embodiments will be provided to discuss BFR mechanism in multi-TRP operation including, but not limited to, link specific BFD, link specific NBI, BFRQ in the multi-TRP operation, BFR response, and link recovery.
  • Fig. 6 illustrates a schematic diagram showing a link specific BFR mechanism 600 in accordance with some embodiments of the disclosure.
  • Fig. 6 is different in that the operations are related to a specific link of the UE.
  • Fig. 6 illustrates the procedure for link specific BFR when link X fails.
  • each of operations 601-605 will be understand by reference to respective one of operations 201-205, and description of operations 601-605 will be omitted for conciseness.
  • Fig. 7 illustrates a flowchart of a method 700 for beam failure detection (BFD) in multi-TRP operation in accordance with some embodiments of the disclosure.
  • the UE may determine a plurality of RS resource sets for BFD of a BFR procedure for a plurality of links.
  • Each of the plurality of RS resource sets is corresponding to one of the plurality of links.
  • one of the plurality of RS resource sets may be configured via higher layer signaling.
  • one of the plurality of RS resource sets may be determined based on a CSI-RS resource or a SSB. For example, the UE may be informed that CSI-RS resource or a SSB will be used as the plurality of RS resource sets, then the CSI-RS in the CSI-RS resource or the synchronization signal in the SSB may be used as the RSs for BFD.
  • the mapping relationship between a RS resource set for BFD and its corresponding link may be configured via higher layer signaling.
  • the higher layer signaling may be listed as follows. Parameter "radioLinkMonitoringSet-Id" or “RadioLinkMonitoringSet-Id” may indicate the mapping relationship.
  • the mapping relationship between a RS resource set for BFD and its corresponding link may be determined based on quasi-co-location (QCL) configuration.
  • QCL quasi-co-location
  • the RSs QCLed with the PDCCH from the same TRP/link may be considered to share the same link.
  • the RSs QCLed with the SSB from the same TRP/link may be considered to share the same link.
  • the RS resource sets may not be configured via higher layer signaling.
  • one of the plurality of RS resource sets may be determined based on RS indicated in transmission configuration indication (TCI) state for a control channel resource set (CORESET) for BFD of an associated link.
  • TCI transmission configuration indication
  • CORESET control channel resource set
  • the mapping relationship between a RS resource set for BFD and its corresponding link may be determined based on higher layer signaling or QCL configuration as described above.
  • the UE may perform BFD for one of the plurality of links based on a corresponding RS resource set of the plurality of RS resource sets.
  • other parameters for BFD e.g. maximum counter of beam failure detection instance beamFailureInstanceMaxCount, and beam failure detection timer beamFailureDetectionTimer, may be configured to be the same for all links or be link specific, which is not limited in the disclosure.
  • Fig. 8 illustrates a flowchart of a method 800 for new beam identification (NBI) in multi-TRP operation in accordance with some embodiments of the disclosure.
  • the UE may determine a plurality of RS resource sets for NBI of the BFR procedure for the plurality of links.
  • Each of the plurality of RS resource sets is corresponding to one of the plurality of links.
  • the UE may perform NBI for one of the plurality of links based on a corresponding RS resource set of the plurality of RS resource sets.
  • one of the plurality of RS resource sets for NBI may be configured via higher layer signaling.
  • one of the plurality of RS resource sets for NBI may be determined based on a CSI-RS resource or a SSB, which is similar as that described for BFD in above method 700.
  • mapping relationship between a RS resource set for NBI and its corresponding link may be determined based on higher layer signaling or QCL configuration, which is similar as that described for BFD in above method 700.
  • the UE may associate each of the plurality of RS resource sets for NBI for a corresponding link with one of the plurality of RS resource sets for BFD for the same link. If beam failure happens in one link based on detection of its RS resource set for BFD, the UE may find new beam (s) from the associated RS resource set for NBI for this link.
  • the RS may be configured for each PRACH resource unit. Then the link index for each RS and corresponding PRACH resource unit may be configured by higher layer signaling or be implicitly indicated via QCL parameters. Similarly, If BFRQ is based on PUCCH, the RS may be configured for each PUCCH resource unit. Then the link index for each RS and corresponding PUCCH resource unit may be configured by higher layer signaling or be implicitly indicated via QCL parameters.
  • Fig. 9 illustrates a flowchart of a method for transmission of BFRQ and BFR response in multi-TRP operation in accordance with some embodiments of the disclosure.
  • the UE may generate one or more BFRQs for the plurality of links.
  • the UE may transmit the one or more BFRQs to the plurality of TRPs via the plurality of links.
  • the one or more BFRQs may include a plurality of BFRQs, and each of the plurality of BFRQs is to carry request information for a corresponding one of the plurality of links. If multiple links fail, the UE may transmit multiple BFRQs.
  • the BFRQ may be based on PRACH or PUCCH, which is not limited in this respect.
  • the mapping relationship between uplink resource (PRACH or PUCCH resource) for the one or more BFRQs and the plurality of links may be determined based on higher layer signaling or QCL configuration. In the case where the UE transmits the BFRQ per link, as a further extension, it may include an indication of whether another link or panel needs BFR.
  • the one or more BFRQs may include a single BFRQ, and the single BFRQ is to carry request information for all of the plurality of links.
  • the request information for a link in the both cases may include an index of a new beam and/or a quality indicator of a new beam as mentioned above, for example, index and/or quality indicator for link 1, index and/or quality indicator for link 2, and so on.
  • the request information for a link may, alternatively or additionally, include an index of a CC/BWP for the link in a carrier aggregation mode.
  • the request information for a link may, alternatively or additionally, include default information when no beam failure happens for the link.
  • the UE may monitor one or more dedicated SS-BFRs for reception of one or more responses to the one or more BFRQs for the plurality of links. If the UE is configured with a single SS-BFR, the single SS-BFR is configured to carry the BFR responses for all of the links. If the UE is configured with multiple SS-BFRs, each of the SS-BFRs is associated with a corresponding one of the multiple links. The SS-BFR may be QCLed with a new beam from one failed link. If multiple links fail, SS-BFR is QCLed with one failed link based on a predefined rule, e.g. the link with lowest link ID.
  • a predefined rule e.g. the link with lowest link ID.
  • Fig. 10 illustrates example components of a device 1000 in accordance with some embodiments.
  • the device 1000 may include application circuitry 1002, baseband circuitry 1004, Radio Frequency (RF) circuitry 1006, front-end module (FEM) circuitry 1008, one or more antennas 1010, and power management circuitry (PMC) 1012 coupled together at least as shown.
  • the components of the illustrated device 1000 may be included in a UE or an AN.
  • the device 1000 may include less elements (e.g., an AN may not utilize application circuitry 1002, and instead include a processor/controller to process IP data received from an EPC) .
  • the device 1000 may include additional elements such as, for example, memory/storage, display, camera, sensor, or input/output (I/O) interface.
  • the components described below may be included in more than one device (e.g., said circuitries may be separately included in more than one device for Cloud-RAN (C-RAN) implementations) .
  • C-RAN Cloud-RAN
  • the application circuitry 1002 may include one or more application processors.
  • the application circuitry 1002 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the processor may include any combination of general-purpose processors and dedicated processors (e.g., graphics processors, application processors, etc. ) .
  • the processors may be coupled with or may include memory/storage and may be configured to execute instructions stored in the memory/storage to enable various applications or operating systems to run on the device 1000.
  • processors of application circuitry 1002 may process IP data packets received from an EPC.
  • the baseband circuitry 1004 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the baseband circuitry 1004 may include one or more baseband processors or control logic to process baseband signals received from a receive signal path of the RF circuitry 1006 and to generate baseband signals for a transmit signal path of the RF circuitry 1006.
  • Baseband processing circuitry 1004 may interface with the application circuitry 1002 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 1006.
  • the baseband circuitry 1004 may include a third generation (3G) baseband processor 1004A, a fourth generation (4G) baseband processor 1004B, a fifth generation (5G) baseband processor 1004C, or other baseband processor (s) 1004D for other existing generations, generations in development or to be developed in the future (e.g., sixth generation (6G) , etc. ) .
  • the baseband circuitry 1004 e.g., one or more of baseband processors 1004A-D
  • baseband processors 1004A-D may be included in modules stored in the memory 1004G and executed via a Central Processing Unit (CPU) 1004E.
  • the radio control functions may include, but are not limited to, signal modulation/demodulation, encoding/decoding, radio frequency shifting, etc.
  • modulation/demodulation circuitry of the baseband circuitry 1004 may include Fast-Fourier Transform (FFT) , precoding, or constellation mapping/demapping functionality.
  • FFT Fast-Fourier Transform
  • encoding/decoding circuitry of the baseband circuitry 1004 may include convolution, tail-biting convolution, turbo, Viterbi, or Low Density Parity Check (LDPC) encoder/decoder functionality.
  • LDPC Low Density Parity Check
  • the baseband circuitry 1004 may include one or more audio digital signal processor (s) (DSP) 1004F.
  • the audio DSP (s) 1004F may include elements for compression/decompression and echo cancellation and may include other suitable processing elements in other embodiments.
  • Components of the baseband circuitry may be suitably combined in a single chip, a single chipset, or disposed on a same circuit board in some embodiments.
  • some or all of the constituent components of the baseband circuitry 1004 and the application circuitry 1002 may be implemented together such as, for example, on a system on a chip (SOC) .
  • SOC system on a chip
  • the baseband circuitry 1004 may provide for communication compatible with one or more radio technologies.
  • the baseband circuitry 1004 may support communication with an evolved universal terrestrial radio access network (EUTRAN) or other wireless metropolitan area networks (WMAN) , a wireless local area network (WLAN) , a wireless personal area network (WPAN) .
  • EUTRAN evolved universal terrestrial radio access network
  • WMAN wireless metropolitan area networks
  • WLAN wireless local area network
  • WPAN wireless personal area network
  • multi-mode baseband circuitry Embodiments in which the baseband circuitry 1004 is configured to support radio communications of more than one wireless protocol.
  • RF circuitry 1006 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium.
  • the RF circuitry 1006 may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network.
  • RF circuitry 1006 may include a receive signal path which may include circuitry to down-convert RF signals received from the FEM circuitry 1008 and provide baseband signals to the baseband circuitry 1004.
  • RF circuitry 1006 may also include a transmit signal path which may include circuitry to up-convert baseband signals provided by the baseband circuitry 1004 and provide RF output signals to the FEM circuitry 1008 for transmission.
  • the receive signal path of the RF circuitry 1006 may include mixer circuitry 1006a, amplifier circuitry 1006b and filter circuitry 1006c.
  • the transmit signal path of the RF circuitry 1006 may include filter circuitry 1006c and mixer circuitry 1006a.
  • RF circuitry 1006 may also include synthesizer circuitry 1006d for synthesizing a frequency for use by the mixer circuitry 1006a of the receive signal path and the transmit signal path.
  • the mixer circuitry 1006a of the receive signal path may be configured to down-convert RF signals received from the FEM circuitry 1008 based on the synthesized frequency provided by synthesizer circuitry 1006d.
  • the amplifier circuitry 1006b may be configured to amplify the down-converted signals and the filter circuitry 1006c may be a low-pass filter (LPF) or band-pass filter (BPF) configured to remove unwanted signals from the down-converted signals to generate output baseband signals.
  • Output baseband signals may be provided to the baseband circuitry 1004 for further processing.
  • the output baseband signals may be zero-frequency baseband signals, although this is not a requirement.
  • mixer circuitry 1006a of the receive signal path may comprise passive mixers, although the scope of the embodiments is not limited in this respect.
  • the mixer circuitry 1006a of the transmit signal path may be configured to up-convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry 1006d to generate RF output signals for the FEM circuitry 1008.
  • the baseband signals may be provided by the baseband circuitry 1004 and may be filtered by filter circuitry 1006c.
  • the mixer circuitry 1006a of the receive signal path and the mixer circuitry 1006a of the transmit signal path may include two or more mixers and may be arranged for quadrature downconversion and upconversion, respectively.
  • the mixer circuitry 1006a of the receive signal path and the mixer circuitry 1006a of the transmit signal path may include two or more mixers and may be arranged for image rejection (e.g., Hartley image rejection) .
  • the mixer circuitry 1006a of the receive signal path and the mixer circuitry 1006a of the transmit signal path may be arranged for direct downconversion and direct upconversion, respectively.
  • the mixer circuitry 1006a of the receive signal path and the mixer circuitry 1006a of the transmit signal path may be configured for super- heterodyne operation.
  • the output baseband signals and the input baseband signals may be analog baseband signals, although the scope of the embodiments is not limited in this respect.
  • the output baseband signals and the input baseband signals may be digital baseband signals.
  • the RF circuitry 1006 may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuitry and the baseband circuitry 1004 may include a digital baseband interface to communicate with the RF circuitry 1006.
  • ADC analog-to-digital converter
  • DAC digital-to-analog converter
  • a separate radio IC circuitry may be provided for processing signals for each spectrum, although the scope of the embodiments is not limited in this respect.
  • the synthesizer circuitry 1006d may be a fractional-N synthesizer or a fractional N/N+1 synthesizer, although the scope of the embodiments is not limited in this respect as other types of frequency synthesizers may be suitable.
  • synthesizer circuitry 1006d may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider.
  • the synthesizer circuitry 1006d may be configured to synthesize an output frequency for use by the mixer circuitry 1006a of the RF circuitry 1006 based on a frequency input and a divider control input. In some embodiments, the synthesizer circuitry 1006d may be a fractional N/N+1 synthesizer.
  • frequency input may be provided by a voltage controlled oscillator (VCO) , although that is not a requirement.
  • VCO voltage controlled oscillator
  • Divider control input may be provided by either the baseband circuitry 1004 or the applications processor 1002 depending on the desired output frequency.
  • a divider control input (e.g., N) may be determined from a look-up table based on a channel indicated by the applications processor 1002.
  • Synthesizer circuitry 1006d of the RF circuitry 1006 may include a divider, a delay- locked loop (DLL) , a multiplexer and a phase accumulator.
  • the divider may be a dual modulus divider (DMD) and the phase accumulator may be a digital phase accumulator (DPA) .
  • the DMD may be configured to divide the input signal by either N or N+1 (e.g., based on a carry out) to provide a fractional division ratio.
  • the DLL may include a set of cascaded, tunable, delay elements, a phase detector, a charge pump and a D-type flip-flop.
  • the delay elements may be configured to break a VCO period up into Nd equal packets of phase, where Nd is the number of delay elements in the delay line.
  • Nd is the number of delay elements in the delay line.
  • synthesizer circuitry 1006d may be configured to generate a carrier frequency as the output frequency, while in other embodiments, the output frequency may be a multiple of the carrier frequency (e.g., twice the carrier frequency, four times the carrier frequency) and used in conjunction with quadrature generator and divider circuitry to generate multiple signals at the carrier frequency with multiple different phases with respect to each other.
  • the output frequency may be a LO frequency (fLO) .
  • the RF circuitry 1006 may include an IQ/polar converter.
  • FEM circuitry 1008 may include a receive signal path which may include circuitry configured to operate on RF signals received from one or more antennas 1010, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 1006 for further processing.
  • FEM circuitry 1008 may also include a transmit signal path which may include circuitry configured to amplify signals for transmission provided by the RF circuitry 1006 for transmission by one or more of the one or more antennas 1010.
  • the amplification through the transmit or receive signal paths may be done solely in the RF circuitry 1006, solely in the FEM 1008, or in both the RF circuitry 1006 and the FEM 1008.
  • the FEM circuitry 1008 may include a TX/RX switch to switch between transmit mode and receive mode operation.
  • the FEM circuitry may include a receive signal path and a transmit signal path.
  • the receive signal path of the FEM circuitry may include an LNA to amplify received RF signals and provide the amplified received RF signals as an output (e.g., to the RF circuitry 1006) .
  • the transmit signal path of the FEM circuitry 1008 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by RF circuitry 1006) , and one or more filters to generate RF signals for subsequent transmission (e.g., by one or more of the one or more antennas 1010) .
  • PA power amplifier
  • the PMC 1012 may manage power provided to the baseband circuitry 1004.
  • the PMC 1012 may control power-source selection, voltage scaling, battery charging, or DC-to-DC conversion.
  • the PMC 1012 may often be included when the device 1000 is capable of being powered by a battery, for example, when the device is included in a UE.
  • the PMC 1012 may increase the power conversion efficiency while providing desirable implementation size and heat dissipation characteristics.
  • Fig. 10 shows the PMC 1012 coupled only with the baseband circuitry 1004.
  • the PMC 1012 may be additionally or alternatively coupled with, and perform similar power management operations for, other components such as, but not limited to, application circuitry 1002, RF circuitry 1006, or FEM 1008.
  • the PMC 1012 may control, or otherwise be part of, various power saving mechanisms of the device 1000. For example, if the device 1000 is in an RRC_Connected state, where it is still connected to the RAN node as it expects to receive traffic shortly, then it may enter a state known as Discontinuous Reception Mode (DRX) after a period of inactivity. During this state, the device 1000 may power down for brief intervals of time and thus save power.
  • DRX Discontinuous Reception Mode
  • the device 1000 may transition off to an RRC_Idle state, where it disconnects from the network and does not perform operations such as channel quality feedback, handover, etc.
  • the device 1000 goes into a very low power state and it performs paging where again it periodically wakes up to listen to the network and then powers down again.
  • the device 1000 may not receive data in this state, in order to receive data, it may transition back to RRC_Connected state.
  • An additional power saving mode may allow a device to be unavailable to the network for periods longer than a paging interval (ranging from seconds to a few hours) . During this time, the device is totally unreachable to the network and may power down completely. Any data sent during this time incurs a large delay and it is assumed the delay is acceptable.
  • Processors of the application circuitry 1002 and processors of the baseband circuitry 1004 may be used to execute elements of one or more instances of a protocol stack.
  • processors of the baseband circuitry 1004 may be used execute Layer 3, Layer 2, or Layer 1 functionality, while processors of the application circuitry 1004 may utilize data (e.g., packet data) received from these layers and further execute Layer 4 functionality (e.g., transmission communication protocol (TCP) and user datagram protocol (UDP) layers) .
  • Layer 3 may comprise a RRC layer.
  • Layer 2 may comprise a medium access control (MAC) layer, a radio link control (RLC) layer, and a packet data convergence protocol (PDCP) layer.
  • Layer 1 may comprise a physical (PHY) layer of a UE/RAN node.
  • Fig. 11 illustrates example interfaces of baseband circuitry in accordance with some embodiments.
  • the baseband circuitry 1004 of Fig. 10 may comprise processors 1004A-1004E and a memory 1004G utilized by said processors.
  • Each of the processors 1004A-1004E may include a memory interface, 1104A-1104E, respectively, to send/receive data to/from the memory 1004G.
  • the baseband circuitry 1004 may further include one or more interfaces to communicatively couple to other circuitries/devices, such as a memory interface 1112 (e.g., an interface to send/receive data to/from memory external to the baseband circuitry 1004) , an application circuitry interface 1114 (e.g., an interface to send/receive data to/from the application circuitry 1002 of Fig. 10) , an RF circuitry interface 1116 (e.g., an interface to send/receive data to/from RF circuitry 1006 of Fig.
  • a memory interface 1112 e.g., an interface to send/receive data to/from memory external to the baseband circuitry 1004
  • an application circuitry interface 1114 e.g., an interface to send/receive data to/from the application circuitry 1002 of Fig.
  • an RF circuitry interface 1116 e.g., an interface to send/receive data to/from RF circuitry 1006 of Fig.
  • a wireless hardware connectivity interface 1118 e.g., an interface to send/receive data to/from Near Field Communication (NFC) components, components (e.g., Low Energy) , components, and other communication components
  • NFC Near Field Communication
  • components e.g., Low Energy
  • components e.g., Low Energy
  • components e.g., Low Energy
  • components e.g., Low Energy
  • components e.g., Low Energy
  • Fig. 12 is a block diagram illustrating components, according to some example embodiments, able to read instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium) and perform any one or more of the methodologies discussed herein.
  • Fig. 12 shows a diagrammatic representation of hardware resources 1200 including one or more processors (or processor cores) 1210, one or more memory/storage devices 1220, and one or more communication resources 1230, each of which may be communicatively coupled via a bus 1240.
  • node virtualization e.g., NFV
  • a hypervisor 1202 may be executed to provide an execution environment for one or more network slices/sub-slices to utilize the hardware resources 1200.
  • the processors 1210 may include, for example, a processor 1212 and a processor 1214.
  • CPU central processing unit
  • RISC reduced instruction set computing
  • CISC complex instruction set computing
  • GPU graphics processing unit
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • RFIC radio-frequency integrated circuit
  • the memory/storage devices 1220 may include main memory, disk storage, or any suitable combination thereof.
  • the memory/storage devices 1220 may include, but are not limited to any type of volatile or non-volatile memory such as dynamic random access memory (DRAM) , static random-access memory (SRAM) , erasable programmable read-only memory (EPROM) , electrically erasable programmable read-only memory (EEPROM) , Flash memory, solid-state storage, etc.
  • DRAM dynamic random access memory
  • SRAM static random-access memory
  • EPROM erasable programmable read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • Flash memory solid-state storage, etc.
  • the communication resources 1230 may include interconnection or network interface components or other suitable devices to communicate with one or more peripheral devices 1204 or one or more databases 1206 via a network 1208.
  • the communication resources 1230 may include wired communication components (e.g., for coupling via a Universal Serial Bus (USB) ) , cellular communication components, NFC components, components (e.g., Low Energy) , components, and other communication components.
  • wired communication components e.g., for coupling via a Universal Serial Bus (USB)
  • USB Universal Serial Bus
  • NFC components e.g., Low Energy
  • components e.g., Low Energy
  • Instructions 1250 may comprise software, a program, an application, an applet, an app, or other executable code for causing at least any of the processors 1210 to perform any one or more of the methodologies discussed herein.
  • the instructions 1250 may reside, completely or partially, within at least one of the processors 1210 (e.g., within the processor’s cache memory) , the memory/storage devices 1220, or any suitable combination thereof.
  • any portion of the instructions 1250 may be transferred to the hardware resources 1200 from any combination of the peripheral devices 1204 or the databases 1206. Accordingly, the memory of processors 1210, the memory/storage devices 1220, the peripheral devices 1204, and the databases 1206 are examples of computer-readable and machine-readable media.
  • Example 1 includes an apparatus for a user equipment (UE) , comprising: a radio frequency (RF) interface to receive beam failure recovery request (BFRQ) resource configuration information; and processor circuitry coupled with the RF interface, wherein the processor circuitry is to: determine a physical uplink control channel (PUCCH) resource unit for a BFRQ of a beam failure recovery (BFR) procedure based on the BFRQ resource configuration information received from the RF interface, wherein the BFRQ is to only indicate that beam failure happens; and cause transmission of the BFRQ via the PUCCH resource unit.
  • UE user equipment
  • RF radio frequency
  • BFRQ beam failure recovery request
  • Example 2 includes the apparatus of Example 1, wherein the PUCCH resource unit is dedicated for transmission of the BFRQ.
  • Example 3 includes the apparatus of Example 1 or 2, wherein PUCCH format 0 or PUCCH format 1 carrying scheduling request (SR) is used for indication of the BFRQ.
  • PUCCH format 0 or PUCCH format 1 carrying scheduling request (SR) is used for indication of the BFRQ.
  • Example 4 includes the apparatus of any of Examples 1 to 3, wherein the RF interface is to receive new beam identification (NBI) resource configuration information, wherein the NBI resource configuration information is transmitted from the access node after reception of the BFRQ by the access node, and the processor circuitry is to determine one or more PUCCH resource units for transmission of one or more new candidate beams based on the NBI resource configuration information received from the RF interface.
  • NBI new beam identification
  • Example 5 includes the apparatus of Example 4, wherein short PUCCH or long PUCCH is configured for the one or more PUCCH resource units.
  • Example 6 includes the apparatus of Example 4 or 5, wherein the one or more new candidate beams are configured based on synchronization signal block (SSB) or channel state information reference signal (CSI-RS) via the access node.
  • SSB synchronization signal block
  • CSI-RS channel state information reference signal
  • Example 7 includes the apparatus of any of Examples 4 to 6, wherein the one or more new candidate beams are indicated in a dedicated indicator by the access node.
  • Example 8 includes the apparatus of any of Examples 4 to 6, wherein the one or more new candidate beams are indicated in a PUCCH beam indication parameter (PUCCH-spatialRelationInfo) .
  • PUCCH-spatialRelationInfo PUCCH beam indication parameter
  • Example 9 includes the apparatus of Example 4, wherein the processor circuitry is further to: encode an index or a beam quality indicator of at least one of the one or more new candidate beams in the one or more PUCCH resource units.
  • Example 10 includes the apparatus of Example 9, wherein the beam quality indicator comprises Layer 1 reference signal receiving power (L1-RSRP) , Layer 1 signal to interference plus noise (L1-SINR) or Layer 1 reference signal receiving quality (L1-RSRQ) .
  • L1-RSRP Layer 1 reference signal receiving power
  • L1-SINR Layer 1 signal to interference plus noise
  • L1-RSRQ Layer 1 reference signal receiving quality
  • Example 11 includes the apparatus of Example 9 or 10, wherein the beam quality indicator is predefined or configured by higher layer signaling.
  • Example 12 includes the apparatus of any of Examples 9 to 11, wherein an upper limit for a number of indexes or beam quality indicators of corresponding ones of the one or more new candidate beams that are carried in the one or more PUCCH resource units is predefined or configured by higher layer signaling.
  • Example 13 includes the apparatus of any of Examples 5, wherein the processor circuitry is further to: monitor a dedicated search space for BFR (SS-BFR) a number of slots after the transmission of the one or more new candidate beams, for reception of a response to the BFRQ.
  • SS-BFR dedicated search space for BFR
  • Example 14 includes the apparatus of Example 13, wherein the number of slots is predefined or configured by higher layer signaling.
  • Example 15 includes the apparatus of Example 13 or 14, wherein the SS-BFR is quasi-co-located (QCLed) with a new beam among the one or more new candidate beams, and wherein the new beam is determined based on a predefined rule.
  • the SS-BFR is quasi-co-located (QCLed) with a new beam among the one or more new candidate beams, and wherein the new beam is determined based on a predefined rule.
  • Example 16 includes the apparatus of Example 15, wherein the new beam is determined as:a beam identified based on an index of each of the one or more PUCCH resource units; a beam with highest quality reported in the one or more PUCCH resource units; or a first beam reported in the one or more PUCCH resource units.
  • Example 17 includes an apparatus for a user equipment (UE) , comprising: a radio frequency (RF) interface to receive beam failure recovery (BFR) resource configuration information; and processor circuitry coupled with the RF interface, wherein the processor circuitry is to: determine one or more physical uplink control channel (PUCCH) resource units for a beam failure recovery request (BFRQ) of a BFR procedure based on the BFR resource configuration information received from the RF interface; identify one or more new candidate beams when beam failure happens; encode the BFRQ with the one or more new candidate beams; and cause transmission of the BFRQ via the one or more PUCCH resource units.
  • PUCCH physical uplink control channel
  • Example 18 includes the apparatus of Example 17, wherein the one or more PUCCH resource units are divided into one or more PUCCH resource sets, and a number of the one or more PUCCH resource sets is fixed for a bandwidth part (BWP) or a component carrier (CC) .
  • BWP bandwidth part
  • CC component carrier
  • Example 19 includes the apparatus of Example 18, wherein a number of PUCCH resource units within each of the one or more PUCCH resource sets is fixed.
  • Example 20 includes the apparatus of Example 17, wherein the one or more PUCCH resource units are dedicated for transmission of the BFRQ.
  • Example 21 includes the apparatus of Example 17, wherein the one or more PUCCH resource units are used for transmission of the BFRQ or other signals.
  • Example 22 includes the apparatus of Example 21, wherein the processor circuitry is further to encode an indication in uplink control information (UCI) to explicitly indicate whether the one or more PUCCH resource units are used for the BFRQ or not.
  • UCI uplink control information
  • Example 23 includes the apparatus of Example 17, wherein the one or more new candidate beams are configured via the access node based on synchronization signal block (SSB) or channel state information reference signal (CSI-RS) .
  • SSB synchronization signal block
  • CSI-RS channel state information reference signal
  • Example 24 includes the apparatus of Example 23, wherein the one or more new candidate beams are indicated in a dedicated indicator.
  • Example 25 includes the apparatus of Example 23, wherein the one or more new candidate beams are indicated in a PUCCH beam indication parameter (PUCCH-spatialRelationInfo) .
  • PUCCH-spatialRelationInfo PUCCH-spatialRelationInfo
  • Example 26 includes the apparatus of Example 17, wherein the one or more new candidate beams are selected from any bandwidth part (BWP) or component carrier (CC) .
  • BWP bandwidth part
  • CC component carrier
  • Example 27 includes the apparatus of Example 17, wherein short PUCCH or long PUCCH is configured for the one or more PUCCH resource units.
  • Example 28 includes the apparatus of Example 17, wherein the processor circuitry is further to: encode an index or a beam quality indicator of at least one of the one or more new candidate beams in the BFRQ.
  • Example 29 includes the apparatus of Example 28, wherein the beam quality indicator comprises Layer 1 reference signal receiving power (L1-RSRP) , Layer 1 signal to interference plus noise (L1-SINR) or Layer 1 reference signal receiving quality (L1-RSRQ) .
  • L1-RSRP Layer 1 reference signal receiving power
  • L1-SINR Layer 1 signal to interference plus noise
  • L1-RSRQ Layer 1 reference signal receiving quality
  • Example 30 includes the apparatus of any of Examples 28 or 29, wherein the beam quality indicator is predefined or configured by higher layer signaling.
  • Example 31 includes the apparatus of any of Example 17 to 30, wherein a payload size of the BFRQ is predefined or configured by higher layer signaling.
  • Example 32 includes the apparatus of any of Example 31, wherein an upper limit for a number of indexes or beam quality indicators of corresponding ones of the one or more new candidate beams that are carried in the BFRQ is predefined or configured by higher layer signaling.
  • Example 33 includes the apparatus of any of Examples 17 to 32, wherein the processor circuitry is further to: monitor a dedicated search space for BFR (SS-BFR) a number of slots after the transmission of the BFRQ for reception of a response to the BFRQ.
  • SS-BFR dedicated search space for BFR
  • Example 34 includes the apparatus of Example 33, wherein a number of slots is predefined or configured by higher layer signaling.
  • Example 35 includes the apparatus of Example 33 or 34, wherein the SS-BFR is quasi-co-located (QCLed) with a new beam among the one or more new candidate beams, and wherein the new beam is determined based on a predefined rule.
  • the SS-BFR is quasi-co-located (QCLed) with a new beam among the one or more new candidate beams, and wherein the new beam is determined based on a predefined rule.
  • Example 36 includes the apparatus of Example 35, wherein the new beam is determined as:a beam identified based on an index of each of the one or more PUCCH resource units; a beam with highest quality reported in the BFRQ; or a first beam reported in the BFRQ.
  • Example 37 includes the apparatus of any of Examples 33 to 36, wherein the processor circuitry is further to: retransmit the BFRQ via the one or more PUCCH resource units when the response to the BFRQ is not received within a time window.
  • Example 38 includes the apparatus of Example 37, wherein the time window is predefined or configured by higher layer signaling.
  • Example 39 includes the apparatus of Example 37 or 38, wherein the processor circuitry is further to: perform up to a number of retransmission of the BFRQ, wherein the number of retransmission is predefined or configured by higher layer signaling.
  • Example 40 includes an apparatus for a user equipment (UE) connected to a plurality of access nodes via a plurality of links each of which is associated with the UE and a corresponding one of the plurality of access nodes, the apparatus comprising: a radio frequency (RF) interface; and processor circuitry coupled with the RF interface, wherein the processor circuitry is to: determine a plurality of reference signal (RS) resource sets for beam failure detection (BFD) of a beam failure recovery (BFR) procedure for the plurality of links, each of the plurality of RS resource sets corresponding to one of the plurality of links; and perform BFD for one of the plurality of links based on a corresponding RS resource set of the plurality of RS resource sets.
  • RS reference signal
  • BFD beam failure detection
  • BFR beam failure recovery
  • Example 41 includes the apparatus of Example 40, wherein one of the plurality of RS resource sets is configured via higher layer signaling.
  • Example 42 includes the apparatus of Example 41, wherein one of the plurality of RS resource sets is determined based on a channel state information reference signal (CSI-RS) resource or a synchronization signal block (SSB) .
  • CSI-RS channel state information reference signal
  • SSB synchronization signal block
  • Example 43 includes the apparatus of Example 40, wherein one of the plurality of RS resource sets is determined based on RS indicated in transmission configuration indication (TCI) state for a control channel resource set (CORESET) for BFD of an associated link.
  • TCI transmission configuration indication
  • CORESET control channel resource set
  • Example 44 includes the apparatus of any of Examples 40 to 43, wherein the processor circuitry is further to determine mapping relationship between the plurality of RS resource sets and the plurality of links based on higher layer signaling or quasi-co-location (QCL) configuration.
  • the processor circuitry is further to determine mapping relationship between the plurality of RS resource sets and the plurality of links based on higher layer signaling or quasi-co-location (QCL) configuration.
  • QCL quasi-co-location
  • Example 45 includes the apparatus of any of Examples 40 to 44, wherein the processor circuitry is further to determine a parameter for BFD for one of the plurality of links, wherein the parameter is specific to the corresponding link or configured to be the same for all of the plurality of links.
  • Example 46 includes the apparatus of any of Examples 40 to 45, wherein the plurality of access nodes comprises a plurality of transmission reception points (TRPs) .
  • TRPs transmission reception points
  • Example 47 includes an apparatus for a user equipment (UE) connected to a plurality of access nodes via a plurality of links each of which is associated with the UE and a corresponding one of the plurality of access nodes, the apparatus comprising: a radio frequency (RF) interface; and processor circuitry coupled with the RF interface, wherein the processor circuitry is to: determine a plurality of reference signal (RS) resource sets for new beam identification (NBI) of a beam failure recovery (BFR) procedure for the plurality of links, each of the plurality of RS resource sets corresponding to one of the plurality of links; and perform NBI for one of the plurality of links based on a corresponding RS resource set of the plurality of RS resource sets.
  • RS reference signal
  • NBI beam failure recovery
  • Example 48 includes the apparatus of Example 47, wherein one of the plurality of RS resource sets is configured via higher layer signaling.
  • Example 49 includes the apparatus of Example 48, wherein one of the plurality of RS resource sets is determined based on a channel state information reference signal (CSI-RS) resource or a synchronization signal block (SSB) .
  • CSI-RS channel state information reference signal
  • SSB synchronization signal block
  • Example 50 includes the apparatus of any of Examples 47 to 49, wherein the processor circuitry is further to determine mapping relationship between the plurality of RS resource sets and the plurality of links based on higher layer signaling or quasi-co-location (QCL) configuration.
  • the processor circuitry is further to determine mapping relationship between the plurality of RS resource sets and the plurality of links based on higher layer signaling or quasi-co-location (QCL) configuration.
  • QCL quasi-co-location
  • Example 51 includes the apparatus of any of Examples 47 to 50, wherein the processor circuitry is further to associate each of the plurality of RS resource sets for NBI for a corresponding link with one of a plurality of RS resource sets for beam failure detection (BFD) of the BFR procedure for the same link.
  • BFD beam failure detection
  • Example 52 includes an apparatus for a user equipment (UE) connected to a plurality of access nodes via a plurality of links each of which is associated with the UE and a corresponding one of the plurality of access nodes, the apparatus comprising: a radio frequency (RF) interface; and processor circuitry coupled with the RF interface, wherein the processor circuitry is to: generate one or more beam failure recovery requests (BFRQs) of a beam failure recovery (BFR) procedure for the plurality of links; and cause transmission of the one or more BFRQs to the plurality of access nodes via the plurality of links.
  • UE user equipment
  • RF radio frequency
  • Example 53 includes the apparatus of Example 52, wherein the one or more BFRQs comprise a plurality of BFRQs, and each of the plurality of BFRQs is to carry request information for a corresponding one of the plurality of links.
  • Example 54 includes the apparatus of Example 53, wherein the processor circuitry is further to determine mapping relationship between uplink resource for the one or more BFRQs and the plurality of links based on higher layer signaling or quasi-co-location (QCL) configuration.
  • the processor circuitry is further to determine mapping relationship between uplink resource for the one or more BFRQs and the plurality of links based on higher layer signaling or quasi-co-location (QCL) configuration.
  • QCL quasi-co-location
  • Example 55 includes the apparatus of Example 54, wherein the uplink resource comprises physical uplink control channel (PUCCH) resource or physical random access channel (PRACH) resource.
  • the uplink resource comprises physical uplink control channel (PUCCH) resource or physical random access channel (PRACH) resource.
  • PUCCH physical uplink control channel
  • PRACH physical random access channel
  • Example 56 includes the apparatus of Example 52, wherein the one or more BFRQs comprise a single BFRQ, and the single BFRQ is to carry request information for all of the plurality of links.
  • Example 57 includes the apparatus of any of Examples 53 to 56, wherein the request information for a link comprises an index of a new beam or a quality indicator of a new beam.
  • Example 58 includes the apparatus of any of Examples 53 to 57, wherein the request information for a link comprises an index of a component carrier (CC) or bandwidth part (BWP) for the link in a carrier aggregation mode.
  • CC component carrier
  • BWP bandwidth part
  • Example 59 includes the apparatus of any of Examples 53 to 58, wherein the request information for a link comprises default information when no beam failure happens for the link.
  • Example 60 includes the apparatus of any of Examples 52 to 59, wherein the processor circuitry is to monitor one or more dedicated search spaces for BFR (SS-BFRs) for reception of one or more responses to the one or more BFRQs for the plurality of links.
  • SS-BFRs dedicated search spaces for BFR
  • Example 61 includes the apparatus of Example 60, wherein the one or more dedicated SS-BFRs comprise a single dedicated SS-BFR, and wherein the single dedicated SS-BFR is to carry one or more responses to the one or more BFRQs for all of the plurality of links.
  • Example 62 includes the apparatus of Example 60, wherein the one or more dedicated SS-BFRs comprise a plurality of dedicated SS-BFRs, and wherein each of the plurality of dedicated SS-BFRs is to carry a response to a corresponding BFRQ for a corresponding link.
  • Example 63 includes a method, comprising: determining a physical uplink control channel (PUCCH) resource unit for a BFRQ of a beam failure recovery (BFR) procedure based on the BFRQ resource configuration information received from an access node, wherein the BFRQ is to only indicate that beam failure happens; and transmitting the BFRQ via the PUCCH resource unit.
  • PUCCH physical uplink control channel
  • Example 64 includes the method of Example 63, wherein the PUCCH resource unit is dedicated for transmission of the BFRQ.
  • Example 65 includes the method of Example 63 or 64, wherein PUCCH format 0 or PUCCH format 1 carrying scheduling request (SR) is used for indication of the BFRQ.
  • PUCCH format 0 or PUCCH format 1 carrying scheduling request (SR) is used for indication of the BFRQ.
  • Example 66 includes the method of any of Examples 63 to 65, further comprising: receiving new beam identification (NBI) resource configuration information, wherein the NBI resource configuration information is transmitted from the access node after reception of the BFRQ by the access node, and determining one or more PUCCH resource units for transmission of one or more new candidate beams based on the NBI resource configuration information.
  • NBI new beam identification
  • Example 67 includes the method of Example 66, wherein short PUCCH or long PUCCH is configured for the one or more PUCCH resource units.
  • Example 68 includes the method of Example 66 or 67, wherein the one or more new candidate beams are configured based on synchronization signal block (SSB) or channel state information reference signal (CSI-RS) via the access node.
  • SSB synchronization signal block
  • CSI-RS channel state information reference signal
  • Example 69 includes the method of any of Examples 66 to 68, wherein the one or more new candidate beams are indicated in a dedicated indicator by the access node.
  • Example 70 includes the method of any of Examples 66 to 68, wherein the one or more new candidate beams are indicated in a PUCCH beam indication parameter (PUCCH-spatialRelationInfo) .
  • PUCCH-spatialRelationInfo PUCCH-spatialRelationInfo
  • Example 71 includes the method of Example 66, further comprising: encoding an index or a beam quality indicator of at least one of the one or more new candidate beams in the one or more PUCCH resource units.
  • Example 72 includes the method of Example 71, wherein the beam quality indicator comprises Layer 1 reference signal receiving power (L1-RSRP) , Layer 1 signal to interference plus noise (L1-SINR) or Layer 1 reference signal receiving quality (L1-RSRQ) .
  • L1-RSRP Layer 1 reference signal receiving power
  • L1-SINR Layer 1 signal to interference plus noise
  • L1-RSRQ Layer 1 reference signal receiving quality
  • Example 73 includes the method of Example 71 or 72, wherein the beam quality indicator is predefined or configured by higher layer signaling.
  • Example 74 includes the method of any of Examples 71 to 73, wherein an upper limit for a number of indexes or beam quality indicators of corresponding ones of the one or more new candidate beams that are carried in the one or more PUCCH resource units is predefined or configured by higher layer signaling.
  • Example 75 includes the method of any of Examples 67, further comprising: monitoring a dedicated search space for BFR (SS-BFR) a number of slots after the transmission of the one or more new candidate beams, for reception of a response to the BFRQ.
  • SS-BFR dedicated search space for BFR
  • Example 76 includes the method of Example 75, wherein the number of slots is predefined or configured by higher layer signaling.
  • Example 77 includes the method of Example 75 or 76, wherein the SS-BFR is quasi-co-located (QCLed) with a new beam among the one or more new candidate beams, and wherein the new beam is determined based on a predefined rule.
  • the SS-BFR is quasi-co-located (QCLed) with a new beam among the one or more new candidate beams, and wherein the new beam is determined based on a predefined rule.
  • Example 78 includes the method of Example 77, wherein the new beam is determined as: a beam identified based on an index of each of the one or more PUCCH resource units; a beam with highest quality reported in the one or more PUCCH resource units; or a first beam reported in the one or more PUCCH resource units.
  • Example 79 includes a method, comprising: receiving beam failure recovery (BFR) resource configuration information; determining one or more physical uplink control channel (PUCCH) resource units for a beam failure recovery request (BFRQ) of a BFR procedure based on the BFR resource configuration information received from an access node; identifying one or more new candidate beams when beam failure happens; encoding the BFRQ with the one or more new candidate beams; and transmitting the BFRQ via the one or more PUCCH resource units.
  • BFR beam failure recovery
  • PUCCH physical uplink control channel
  • Example 80 includes the method of Example 79, wherein the one or more PUCCH resource units are divided into one or more PUCCH resource sets, and a number of the one or more PUCCH resource sets is fixed for a bandwidth part (BWP) or a component carrier (CC) .
  • BWP bandwidth part
  • CC component carrier
  • Example 81 includes the method of Example 80, wherein a number of PUCCH resource units within each of the one or more PUCCH resource sets is fixed.
  • Example 82 includes the method of Example 79, wherein the one or more PUCCH resource units are dedicated for transmission of the BFRQ.
  • Example 83 includes the method of Example 79, wherein the one or more PUCCH resource units are used for transmission of the BFRQ or other signals.
  • Example 84 includes the method of Example 83, further comprising: encoding an indication in uplink control information (UCI) to explicitly indicate whether the one or more PUCCH resource units are used for the BFRQ or not.
  • UCI uplink control information
  • Example 85 includes the method of Example 79, wherein the one or more new candidate beams are configured via the access node based on synchronization signal block (SSB) or channel state information reference signal (CSI-RS) .
  • SSB synchronization signal block
  • CSI-RS channel state information reference signal
  • Example 86 includes the method of Example 85, wherein the one or more new candidate beams are indicated in a dedicated indicator.
  • Example 87 includes the method of Example 85, wherein the one or more new candidate beams are indicated in a PUCCH beam indication parameter (PUCCH-spatialRelationInfo) .
  • PUCCH-spatialRelationInfo PUCCH-spatialRelationInfo
  • Example 88 includes the method of Example 79, wherein the one or more new candidate beams are selected from any bandwidth part (BWP) or component carrier (CC) .
  • BWP bandwidth part
  • CC component carrier
  • Example 89 includes the method of Example 79, wherein short PUCCH or long PUCCH is configured for the one or more PUCCH resource units.
  • Example 90 includes the method of Example 79, further comprising: encoding an index or a beam quality indicator of at least one of the one or more new candidate beams in the BFRQ.
  • Example 91 includes the method of Example 90, wherein the beam quality indicator comprises Layer 1 reference signal receiving power (L1-RSRP) , Layer 1 signal to interference plus noise (L1-SINR) or Layer 1 reference signal receiving quality (L1-RSRQ) .
  • L1-RSRP Layer 1 reference signal receiving power
  • L1-SINR Layer 1 signal to interference plus noise
  • L1-RSRQ Layer 1 reference signal receiving quality
  • Example 92 includes the method of any of Examples 90 or 91, wherein the beam quality indicator is predefined or configured by higher layer signaling.
  • Example 93 includes the method of any of Example 79 to 92, wherein a payload size of the BFRQ is predefined or configured by higher layer signaling.
  • Example 94 includes the method of any of Example 93, wherein an upper limit for a number of indexes or beam quality indicators of corresponding ones of the one or more new candidate beams that are carried in the BFRQ is predefined or configured by higher layer signaling.
  • Example 95 includes the method of any of Examples 79 to 94, further comprising: monitoring a dedicated search space for BFR (SS-BFR) a number of slots after the transmission of the BFRQ for reception of a response to the BFRQ.
  • SS-BFR dedicated search space for BFR
  • Example 96 includes the method of Example 95, wherein a number of slots is predefined or configured by higher layer signaling.
  • Example 97 includes the method of Example 95 or 96, wherein the SS-BFR is quasi-co-located (QCLed) with a new beam among the one or more new candidate beams, and wherein the new beam is determined based on a predefined rule.
  • the SS-BFR is quasi-co-located (QCLed) with a new beam among the one or more new candidate beams, and wherein the new beam is determined based on a predefined rule.
  • Example 98 includes the method of Example 97, wherein the new beam is determined as: a beam identified based on an index of each of the one or more PUCCH resource units; a beam with highest quality reported in the BFRQ; or a first beam reported in the BFRQ.
  • Example 99 includes the method of any of Examples 95 to 98, further comprising: retransmitting the BFRQ via the one or more PUCCH resource units when the response to the BFRQ is not received within a time window.
  • Example 100 includes the method of Example 99, wherein the time window is predefined or configured by higher layer signaling.
  • Example 101 includes the method of Example 99 or 100, further comprising: performing up to a number of retransmission of the BFRQ, wherein the number of retransmission is predefined or configured by higher layer signaling.
  • Example 102 includes a method performed by a user equipment (UE) connected to a plurality of access nodes via a plurality of links each of which is associated with the UE and a corresponding one of the plurality of access nodes, the method comprising: determining a plurality of reference signal (RS) resource sets for beam failure detection (BFD) of a beam failure recovery (BFR) procedure for the plurality of links, each of the plurality of RS resource sets corresponding to one of the plurality of links; and performing BFD for one of the plurality of links based on a corresponding RS resource set of the plurality of RS resource sets.
  • RS reference signal
  • Example 103 includes the method of Example 102, wherein one of the plurality of RS resource sets is configured via higher layer signaling.
  • Example 104 includes the method of Example 103, wherein one of the plurality of RS resource sets is determined based on a channel state information reference signal (CSI-RS) resource or a synchronization signal block (SSB) .
  • CSI-RS channel state information reference signal
  • SSB synchronization signal block
  • Example 105 includes the method of Example 102, wherein one of the plurality of RS resource sets is determined based on RS indicated in transmission configuration indication (TCI) state for a control channel resource set (CORESET) for BFD of an associated link.
  • TCI transmission configuration indication
  • CORESET control channel resource set
  • Example 106 includes the method of any of Examples 102 to 105, further comprising: determining mapping relationship between the plurality of RS resource sets and the plurality of links based on higher layer signaling or quasi-co-location (QCL) configuration.
  • QCL quasi-co-location
  • Example 107 includes the method of any of Examples 102 to 106, further comprising: determining a parameter for BFD for one of the plurality of links, wherein the parameter is specific to the corresponding link or configured to be the same for all of the plurality of links.
  • Example 108 includes the method of any of Examples 102 to 107, wherein the plurality of access nodes comprises a plurality of transmission reception points (TRPs) .
  • TRPs transmission reception points
  • Example 109 includes a method performed by a user equipment (UE) connected to a plurality of access nodes via a plurality of links each of which is associated with the UE and a corresponding one of the plurality of access nodes, the method comprising: determining a plurality of reference signal (RS) resource sets for new beam identification (NBI) of a beam failure recovery (BFR) procedure for the plurality of links, each of the plurality of RS resource sets corresponding to one of the plurality of links; and performing NBI for one of the plurality of links based on a corresponding RS resource set of the plurality of RS resource sets.
  • RS reference signal
  • NBI new beam identification
  • BFR beam failure recovery
  • Example 110 includes the method of Example 109, wherein one of the plurality of RS resource sets is configured via higher layer signaling.
  • Example 111 includes the method of Example 110, wherein one of the plurality of RS resource sets is determined based on a channel state information reference signal (CSI-RS) resource or a synchronization signal block (SSB) .
  • CSI-RS channel state information reference signal
  • SSB synchronization signal block
  • Example 112 includes the method of any of Examples 109 to 111, further comprising: determining mapping relationship between the plurality of RS resource sets and the plurality of links based on higher layer signaling or quasi-co-location (QCL) configuration.
  • QCL quasi-co-location
  • Example 113 includes the method of any of Examples 109 to 112, further comprising: associating each of the plurality of RS resource sets for NBI for a corresponding link with one of a plurality of RS resource sets for beam failure detection (BFD) of the BFR procedure for the same link.
  • BFD beam failure detection
  • Example 114 includes a method performed by a user equipment (UE) connected to a plurality of access nodes via a plurality of links each of which is associated with the UE and a corresponding one of the plurality of access nodes, the method comprising: generating one or more beam failure recovery requests (BFRQs) of a beam failure recovery (BFR) procedure for the plurality of links; and transmitting the one or more BFRQs to the plurality of access nodes via the plurality of links.
  • UE user equipment
  • BFRQs beam failure recovery requests
  • BFR beam failure recovery
  • Example 115 includes the method of Example 114, wherein the one or more BFRQs comprise a plurality of BFRQs, and each of the plurality of BFRQs is to carry request information for a corresponding one of the plurality of links.
  • Example 116 includes the method of Example 115, further comprising: determining mapping relationship between uplink resource for the one or more BFRQs and the plurality of links based on higher layer signaling or quasi-co-location (QCL) configuration.
  • QCL quasi-co-location
  • Example 117 includes the method of Example 116, wherein the uplink resource comprises physical uplink control channel (PUCCH) resource or physical random access channel (PRACH) resource.
  • PUCCH physical uplink control channel
  • PRACH physical random access channel
  • Example 118 includes the method of Example 114, wherein the one or more BFRQs comprise a single BFRQ, and the single BFRQ is to carry request information for all of the plurality of links.
  • Example 119 includes the method of any of Examples 115 to 118, wherein the request information for a link comprises an index of a new beam or a quality indicator of a new beam.
  • Example 120 includes the method of any of Examples 115 to 119, wherein the request information for a link comprises an index of a component carrier (CC) or bandwidth part (BWP) for the link in a carrier aggregation mode.
  • CC component carrier
  • BWP bandwidth part
  • Example 121 includes the method of any of Examples 115 to 120, wherein the request information for a link comprises default information when no beam failure happens for the link.
  • Example 122 includes the method of any of Examples 114 to 121, further comprising: monitoring one or more dedicated search spaces for BFR (SS-BFRs) for reception of one or more responses to the one or more BFRQs for the plurality of links.
  • SS-BFRs dedicated search spaces for BFR
  • Example 123 includes the method of Example 122, wherein the one or more dedicated SS-BFRs comprise a single dedicated SS-BFR, and wherein the single dedicated SS-BFR is to carry one or more responses to the one or more BFRQs for all of the plurality of links.
  • Example 124 includes the method of Example 122, wherein the one or more dedicated SS-BFRs comprise a plurality of dedicated SS-BFRs, and wherein each of the plurality of dedicated SS-BFRs is to carry a response to a corresponding BFRQ for a corresponding link.
  • Example 125 includes an apparatus for a user equipment (UE) , comprising: means for determining a physical uplink control channel (PUCCH) resource unit for a BFRQ of a beam failure recovery (BFR) procedure based on the BFRQ resource configuration information received from an access node, wherein the BFRQ is to only indicate that beam failure happens; and means for transmitting the BFRQ via the PUCCH resource unit.
  • UE user equipment
  • PUCCH physical uplink control channel
  • BFR beam failure recovery
  • Example 126 includes the apparatus of Example 125, wherein the PUCCH resource unit is dedicated for transmission of the BFRQ.
  • Example 127 includes the apparatus of Example 125 or 126, wherein PUCCH format 0 or PUCCH format 1 carrying scheduling request (SR) is used for indication of the BFRQ.
  • PUCCH format 0 or PUCCH format 1 carrying scheduling request (SR) is used for indication of the BFRQ.
  • Example 128 includes the apparatus of any of Examples 125 to 127, further comprising: means for receiving new beam identification (NBI) resource configuration information, wherein the NBI resource configuration information is transmitted from the access node after reception of the BFRQ by the access node, and means for determining one or more PUCCH resource units for transmission of one or more new candidate beams based on the NBI resource configuration information.
  • NBI new beam identification
  • Example 129 includes the apparatus of Example 128, wherein short PUCCH or long PUCCH is configured for the one or more PUCCH resource units.
  • Example 130 includes the apparatus of Example 128 or 129, wherein the one or more new candidate beams are configured based on synchronization signal block (SSB) or channel state information reference signal (CSI-RS) via the access node.
  • SSB synchronization signal block
  • CSI-RS channel state information reference signal
  • Example 131 includes the apparatus of any of Examples 128 to 130, wherein the one or more new candidate beams are indicated in a dedicated indicator by the access node.
  • Example 132 includes the apparatus of any of Examples 128 to 130, wherein the one or more new candidate beams are indicated in a PUCCH beam indication parameter (PUCCH-spatialRelationInfo) .
  • PUCCH-spatialRelationInfo PUCCH beam indication parameter
  • Example 133 includes the apparatus of Example 128, further comprising: means for encoding an index or a beam quality indicator of at least one of the one or more new candidate beams in the one or more PUCCH resource units.
  • Example 134 includes the apparatus of Example 133, wherein the beam quality indicator comprises Layer 1 reference signal receiving power (L1-RSRP) , Layer 1 signal to interference plus noise (L1-SINR) or Layer 1 reference signal receiving quality (L1-RSRQ) .
  • L1-RSRP Layer 1 reference signal receiving power
  • L1-SINR Layer 1 signal to interference plus noise
  • L1-RSRQ Layer 1 reference signal receiving quality
  • Example 135 includes the apparatus of Example 133 or 134, wherein the beam quality indicator is predefined or configured by higher layer signaling.
  • Example 136 includes the apparatus of any of Examples 133 to 135, wherein an upper limit for a number of indexes or beam quality indicators of corresponding ones of the one or more new candidate beams that are carried in the one or more PUCCH resource units is predefined or configured by higher layer signaling.
  • Example 137 includes the apparatus of any of Examples 129, further comprising: means for monitoring a dedicated search space for BFR (SS-BFR) a number of slots after the transmission of the one or more new candidate beams, for reception of a response to the BFRQ.
  • SS-BFR dedicated search space for BFR
  • Example 138 includes the apparatus of Example 137, wherein the number of slots is predefined or configured by higher layer signaling.
  • Example 139 includes the apparatus of Example 137 or 138, wherein the SS-BFR is quasi-co-located (QCLed) with a new beam among the one or more new candidate beams, and wherein the new beam is determined based on a predefined rule.
  • the SS-BFR is quasi-co-located (QCLed) with a new beam among the one or more new candidate beams, and wherein the new beam is determined based on a predefined rule.
  • Example 140 includes the apparatus of Example 139, wherein the new beam is determined as: a beam identified based on an index of each of the one or more PUCCH resource units; a beam with highest quality reported in the one or more PUCCH resource units; or a first beam reported in the one or more PUCCH resource units.
  • Example 141 includes an apparatus for a user equipment (UE) , comprising: means for receiving beam failure recovery (BFR) resource configuration information; means for determining one or more physical uplink control channel (PUCCH) resource units for a beam failure recovery request (BFRQ) of a BFR procedure based on the BFR resource configuration information received from an access node; means for identifying one or more new candidate beams when beam failure happens; means for encoding the BFRQ with the one or more new candidate beams; and means for transmitting the BFRQ via the one or more PUCCH resource units.
  • BFR beam failure recovery
  • PUCCH physical uplink control channel
  • Example 142 includes the apparatus of Example 141, wherein the one or more PUCCH resource units are divided into one or more PUCCH resource sets, and a number of the one or more PUCCH resource sets is fixed for a bandwidth part (BWP) or a component carrier (CC) .
  • BWP bandwidth part
  • CC component carrier
  • Example 143 includes the apparatus of Example 142, wherein a number of PUCCH resource units within each of the one or more PUCCH resource sets is fixed.
  • Example 144 includes the apparatus of Example 141, wherein the one or more PUCCH resource units are dedicated for transmission of the BFRQ.
  • Example 145 includes the apparatus of Example 141, wherein the one or more PUCCH resource units are used for transmission of the BFRQ or other signals.
  • Example 146 includes the apparatus of Example 145, further comprising: means for encoding an indication in uplink control information (UCI) to explicitly indicate whether the one or more PUCCH resource units are used for the BFRQ or not.
  • UCI uplink control information
  • Example 147 includes the apparatus of Example 141, wherein the one or more new candidate beams are configured via the access node based on synchronization signal block (SSB) or channel state information reference signal (CSI-RS) .
  • SSB synchronization signal block
  • CSI-RS channel state information reference signal
  • Example 148 includes the apparatus of Example 147, wherein the one or more new candidate beams are indicated in a dedicated indicator.
  • Example 149 includes the apparatus of Example 147, wherein the one or more new candidate beams are indicated in a PUCCH beam indication parameter (PUCCH-spatialRelationInfo) .
  • PUCCH-spatialRelationInfo PUCCH-spatialRelationInfo
  • Example 150 includes the apparatus of Example 141, wherein the one or more new candidate beams are selected from any bandwidth part (BWP) or component carrier (CC) .
  • BWP bandwidth part
  • CC component carrier
  • Example 151 includes the apparatus of Example 141, wherein short PUCCH or long PUCCH is configured for the one or more PUCCH resource units.
  • Example 152 includes the apparatus of Example 141, further comprising: means for encoding an index or a beam quality indicator of at least one of the one or more new candidate beams in the BFRQ.
  • Example 153 includes the apparatus of Example 152, wherein the beam quality indicator comprises Layer 1 reference signal receiving power (L1-RSRP) , Layer 1 signal to interference plus noise (L1-SINR) or Layer 1 reference signal receiving quality (L1-RSRQ) .
  • L1-RSRP Layer 1 reference signal receiving power
  • L1-SINR Layer 1 signal to interference plus noise
  • L1-RSRQ Layer 1 reference signal receiving quality
  • Example 154 includes the apparatus of any of Examples 152 or 153, wherein the beam quality indicator is predefined or configured by higher layer signaling.
  • Example 155 includes the apparatus of any of Example 141 to 154, wherein a payload size of the BFRQ is predefined or configured by higher layer signaling.
  • Example 156 includes the apparatus of any of Example 155, wherein an upper limit for a number of indexes or beam quality indicators of corresponding ones of the one or more new candidate beams that are carried in the BFRQ is predefined or configured by higher layer signaling.
  • Example 157 includes the apparatus of any of Examples 141 to 156, further comprising: means for monitoring a dedicated search space for BFR (SS-BFR) a number of slots after the transmission of the BFRQ for reception of a response to the BFRQ.
  • SS-BFR dedicated search space for BFR
  • Example 158 includes the apparatus of Example 157, wherein a number of slots is predefined or configured by higher layer signaling.
  • Example 159 includes the apparatus of Example 157 or 158, wherein the SS-BFR is quasi-co-located (QCLed) with a new beam among the one or more new candidate beams, and wherein the new beam is determined based on a predefined rule.
  • the SS-BFR is quasi-co-located (QCLed) with a new beam among the one or more new candidate beams, and wherein the new beam is determined based on a predefined rule.
  • Example 160 includes the apparatus of Example 159, wherein the new beam is determined as: a beam identified based on an index of each of the one or more PUCCH resource units; a beam with highest quality reported in the BFRQ; or a first beam reported in the BFRQ.
  • Example 161 includes the apparatus of any of Examples 157 to 160, further comprising: means for retransmitting the BFRQ via the one or more PUCCH resource units when the response to the BFRQ is not received within a time window.
  • Example 162 includes the apparatus of Example 161, wherein the time window is predefined or configured by higher layer signaling.
  • Example 163 includes the apparatus of Example 161 or 162, further comprising: means for performing up to a number of retransmission of the BFRQ, wherein the number of retransmission is predefined or configured by higher layer signaling.
  • Example 164 includes an apparatus for a user equipment (UE) connected to a plurality of access nodes via a plurality of links each of which is associated with the UE and a corresponding one of the plurality of access nodes, the apparatus comprising: means for determining a plurality of reference signal (RS) resource sets for beam failure detection (BFD) of a beam failure recovery (BFR) procedure for the plurality of links, each of the plurality of RS resource sets corresponding to one of the plurality of links; and means for performing BFD for one of the plurality of links based on a corresponding RS resource set of the plurality of RS resource sets.
  • RS reference signal
  • Example 165 includes the apparatus of Example 164, wherein one of the plurality of RS resource sets is configured via higher layer signaling.
  • Example 166 includes the apparatus of Example 165, wherein one of the plurality of RS resource sets is determined based on a channel state information reference signal (CSI-RS) resource or a synchronization signal block (SSB) .
  • CSI-RS channel state information reference signal
  • SSB synchronization signal block
  • Example 167 includes the apparatus of Example 164, wherein one of the plurality of RS resource sets is determined based on RS indicated in transmission configuration indication (TCI) state for a control channel resource set (CORESET) for BFD of an associated link.
  • TCI transmission configuration indication
  • CORESET control channel resource set
  • Example 168 includes the apparatus of any of Examples 164 to 167, further comprising: means for determining mapping relationship between the plurality of RS resource sets and the plurality of links based on higher layer signaling or quasi-co-location (QCL) configuration.
  • QCL quasi-co-location
  • Example 169 includes the apparatus of any of Examples 164 to 168, further comprising: means for determining a parameter for BFD for one of the plurality of links, wherein the parameter is specific to the corresponding link or configured to be the same for all of the plurality of links.
  • Example 170 includes the apparatus of any of Examples 164 to 169, wherein the plurality of access nodes comprises a plurality of transmission reception points (TRPs) .
  • TRPs transmission reception points
  • Example 171 includes an apparatus for a user equipment (UE) connected to a plurality of access nodes via a plurality of links each of which is associated with the UE and a corresponding one of the plurality of access nodes, the apparatus comprising: means for determining a plurality of reference signal (RS) resource sets for new beam identification (NBI) of a beam failure recovery (BFR) procedure for the plurality of links, each of the plurality of RS resource sets corresponding to one of the plurality of links; and means for performing NBI for one of the plurality of links based on a corresponding RS resource set of the plurality of RS resource sets.
  • RS reference signal
  • NBI new beam identification
  • BFR beam failure recovery
  • Example 172 includes the apparatus of Example 171, wherein one of the plurality of RS resource sets is configured via higher layer signaling.
  • Example 173 includes the apparatus of Example 172, wherein one of the plurality of RS resource sets is determined based on a channel state information reference signal (CSI-RS) resource or a synchronization signal block (SSB) .
  • CSI-RS channel state information reference signal
  • SSB synchronization signal block
  • Example 174 includes the apparatus of any of Examples 171 to 173, further comprising: means for determining mapping relationship between the plurality of RS resource sets and the plurality of links based on higher layer signaling or quasi-co-location (QCL) configuration.
  • QCL quasi-co-location
  • Example 175 includes the apparatus of any of Examples 171 to 174, further comprising: means for associating each of the plurality of RS resource sets for NBI for a corresponding link with one of a plurality of RS resource sets for beam failure detection (BFD) of the BFR procedure for the same link.
  • BFD beam failure detection
  • Example 176 includes an apparatus for a user equipment (UE) connected to a plurality of access nodes via a plurality of links each of which is associated with the UE and a corresponding one of the plurality of access nodes, the apparatus comprising: means for generating one or more beam failure recovery requests (BFRQs) of a beam failure recovery (BFR) procedure for the plurality of links; and means for transmitting the one or more BFRQs to the plurality of access nodes via the plurality of links.
  • BFRQs beam failure recovery requests
  • BFR beam failure recovery
  • Example 177 includes the apparatus of Example 176, wherein the one or more BFRQs comprise a plurality of BFRQs, and each of the plurality of BFRQs is to carry request information for a corresponding one of the plurality of links.
  • Example 178 includes the apparatus of Example 177, further comprising: means for determining mapping relationship between uplink resource for the one or more BFRQs and the plurality of links based on higher layer signaling or quasi-co-location (QCL) configuration.
  • QCL quasi-co-location
  • Example 179 includes the apparatus of Example 178, wherein the uplink resource comprises physical uplink control channel (PUCCH) resource or physical random access channel (PRACH) resource.
  • PUCCH physical uplink control channel
  • PRACH physical random access channel
  • Example 180 includes the apparatus of Example 176, wherein the one or more BFRQs comprise a single BFRQ, and the single BFRQ is to carry request information for all of the plurality of links.
  • Example 181 includes the apparatus of any of Examples 177 to 180, wherein the request information for a link comprises an index of a new beam or a quality indicator of a new beam.
  • Example 182 includes the apparatus of any of Examples 177 to 181, wherein the request information for a link comprises an index of a component carrier (CC) or bandwidth part (BWP) for the link in a carrier aggregation mode.
  • CC component carrier
  • BWP bandwidth part
  • Example 183 includes the apparatus of any of Examples 177 to 182, wherein the request information for a link comprises default information when no beam failure happens for the link.
  • Example 184 includes the apparatus of any of Examples 176 to 183, further comprising: means for monitoring one or more dedicated search spaces for BFR (SS-BFRs) for reception of one or more responses to the one or more BFRQs for the plurality of links.
  • SS-BFRs dedicated search spaces for BFR
  • Example 185 includes the apparatus of Example 184, wherein the one or more dedicated SS-BFRs comprise a single dedicated SS-BFR, and wherein the single dedicated SS-BFR is to carry one or more responses to the one or more BFRQs for all of the plurality of links.
  • Example 186 includes the apparatus of Example 184, wherein the one or more dedicated SS-BFRs comprise a plurality of dedicated SS-BFRs, and wherein each of the plurality of dedicated SS-BFRs is to carry a response to a corresponding BFRQ for a corresponding link.
  • Example 187 One or more computer-readable media having instructions stored thereon, the instructions when executed by processor circuitry cause the processor circuitry to perform the method of any one of Examples 63 to 124.
  • Example 188 includes a user equipment (UE) as shown and described in the description.
  • UE user equipment
  • Example 189 includes an access node (AN) as shown and described in the description.
  • Example 190 includes a method performed at a user equipment (UE) as shown and described in the description.
  • UE user equipment
  • Example 191 includes a method performed at an access node (AN) as shown and described in the description.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un appareil et un procédé de rétablissement après défaillance de faisceau. L'invention concerne un appareil destiné à un équipement utilisateur (UE) comprenant : une interface radiofréquence (RF) permettant de recevoir des informations de configuration de ressources de demande de rétablissement après défaillance de faisceau (BFRQ) ; et un circuit de processeur couplé à l'interface RF, le circuit de processeur étant destiné : à déterminer une unité de ressource de canal physique de commande de liaison montante (PUCCH) destinée à une BFRQ d'une procédure de rétablissement après défaillance de faisceau (BFR) en fonction des informations de configuration de ressource BFRQ reçues en provenance de l'interface RF, la BFRQ étant uniquement destinée à indiquer l'occurrence d'une défaillance de faisceau ; et provoquer la transmission de la BFRQ par l'intermédiaire de l'unité de ressource PUCCH. D'autres modes de réalisation peuvent également être décrits et revendiqués.
PCT/CN2019/104165 2018-09-07 2019-09-03 Appareil et procédé de rétablissement après défaillance de faisceau WO2020048443A1 (fr)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021242730A1 (fr) * 2020-05-26 2021-12-02 Qualcomm Incorporated Techniques de récupération de défaillance de faisceau pour de multiples points d'émission-réception dans une cellule secondaire
EP3952133A1 (fr) * 2020-08-05 2022-02-09 ACER Incorporated Équipement utilisateur pour un rapport de défaillance de faisceau et procédé de rapport de défaillance de faisceau
WO2022027475A1 (fr) * 2020-08-06 2022-02-10 Nec Corporation Procédé, dispositif et support de stockage de communication lisible par ordinateur
WO2022072251A1 (fr) * 2020-09-29 2022-04-07 Qualcomm Incorporated Relations entre reprise après défaillance de faisceau de groupe de faisceaux et reprise après défaillance de faisceau de niveau cellule
WO2022072249A1 (fr) * 2020-09-29 2022-04-07 Qualcomm Incorporated Détermination de signal de référence (rs) de détection de défaillance de faisceau (bfd) spécifique à un point de réception de transmission (trp)
EP3982556A1 (fr) * 2020-10-12 2022-04-13 Samsung Electronics Co., Ltd. Procédé et dispositif de récupération de défaillance de faisceau à points de transmission et de réception multiples
CN114374994A (zh) * 2020-10-14 2022-04-19 中国移动通信有限公司研究院 一种波束失败信息的上报、接收方法、终端及网络设备
CN114390568A (zh) * 2020-10-22 2022-04-22 联发科技（新加坡）私人有限公司 波束故障恢复方法及用户设备
WO2022257136A1 (fr) * 2021-06-11 2022-12-15 北京小米移动软件有限公司 Procédé et appareil de récupération après défaillance de faisceau, et support de stockage
EP4161191A4 (fr) * 2020-06-02 2023-11-29 Vivo Mobile Communication Co., Ltd. Procédé et appareil de rétablissement après défaillance de faisceau et dispositif
EP4207862A4 (fr) * 2020-10-22 2024-02-28 Sony Group Corp Dispositif électronique, procédé de communication sans fil et support de stockage non transitoire lisible par ordinateur

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018129300A1 (fr) * 2017-01-06 2018-07-12 Idac Holdings, Inc. Récupération de défaillance de faisceau

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018129300A1 (fr) * 2017-01-06 2018-07-12 Idac Holdings, Inc. Récupération de défaillance de faisceau

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
ASUSTEK: "Discussion on beam failure recovery request in NR", 3GPP TSG-RAN WG2 MEETING #AD-HOC1801 R2-1800042, 26 January 2018 (2018-01-26), XP051385967 *
HUAWEI ET AL.: "Beam failure recovery design details", 3GPP TSG RAN WGI MEETING #90BIS R1-1717302, 13 October 2017 (2017-10-13), XP051340492 *
INTEL CORPORATION: "On SCell Beam Failure Recovery", 3GPP TSG RAN WGI MEETING #94 R1-1808720, 24 August 2018 (2018-08-24), XP051516094 *
MEDIATEK INC.: "Offline discussion summary on remaining issues on Beam Failure Recovery", 3GPP TSG RAN WG1 MEETING #91 R1-1721699, 1 December 2017 (2017-12-01), XP051370777 *
See also references of EP3847861A4 *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021242730A1 (fr) * 2020-05-26 2021-12-02 Qualcomm Incorporated Techniques de récupération de défaillance de faisceau pour de multiples points d'émission-réception dans une cellule secondaire
JP7483058B2 (ja) 2020-06-02 2024-05-14 維沃移動通信有限公司 ビーム障害回復方法、装置及び機器
EP4161191A4 (fr) * 2020-06-02 2023-11-29 Vivo Mobile Communication Co., Ltd. Procédé et appareil de rétablissement après défaillance de faisceau et dispositif
AU2021212030B2 (en) * 2020-08-05 2022-12-01 Acer Incorporated User equipment for beam failure reporting and beam failure reporting method
EP3952133A1 (fr) * 2020-08-05 2022-02-09 ACER Incorporated Équipement utilisateur pour un rapport de défaillance de faisceau et procédé de rapport de défaillance de faisceau
US11930550B2 (en) 2020-08-05 2024-03-12 Acer Incorporated Equipment for beam failure reporting and beam failure reporting method
WO2022027475A1 (fr) * 2020-08-06 2022-02-10 Nec Corporation Procédé, dispositif et support de stockage de communication lisible par ordinateur
WO2022072249A1 (fr) * 2020-09-29 2022-04-07 Qualcomm Incorporated Détermination de signal de référence (rs) de détection de défaillance de faisceau (bfd) spécifique à un point de réception de transmission (trp)
US11825293B2 (en) 2020-09-29 2023-11-21 Qualcomm Incorporated Relations between beam group beam failure recovery and cell level beam failure recovery
WO2022072251A1 (fr) * 2020-09-29 2022-04-07 Qualcomm Incorporated Relations entre reprise après défaillance de faisceau de groupe de faisceaux et reprise après défaillance de faisceau de niveau cellule
EP3982556A1 (fr) * 2020-10-12 2022-04-13 Samsung Electronics Co., Ltd. Procédé et dispositif de récupération de défaillance de faisceau à points de transmission et de réception multiples
US11950310B2 (en) 2020-10-12 2024-04-02 Samsung Electronics Co., Ltd. Method and device for multiple transmission and reception points beam failure recovery
CN114374994A (zh) * 2020-10-14 2022-04-19 中国移动通信有限公司研究院 一种波束失败信息的上报、接收方法、终端及网络设备
CN114390568A (zh) * 2020-10-22 2022-04-22 联发科技（新加坡）私人有限公司 波束故障恢复方法及用户设备
EP4207862A4 (fr) * 2020-10-22 2024-02-28 Sony Group Corp Dispositif électronique, procédé de communication sans fil et support de stockage non transitoire lisible par ordinateur
WO2022257136A1 (fr) * 2021-06-11 2022-12-15 北京小米移动软件有限公司 Procédé et appareil de récupération après défaillance de faisceau, et support de stockage

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