Wireless communication method and apparatus

Abstract

A method and apparatus for wireless communication are provided. The method is performed by a user equipment (UE) and includes, if the UE determines that at least one beam failure recovery (BFR) has been triggered and not cancelled, the UE performing one or more of generating a BFR medium access control (MAC) control element (CE) and triggering a scheduling request (SR) for BFR. This can address the problems in the prior art, provide MAC CE and / or SR transmission for BFR, and provide excellent communication performance and / or high reliability.

Description

Technical Field

[0001] This disclosure relates to the field of communication system technology, and in particular to a wireless communication method and apparatus that provides excellent communication performance and / or high reliability. Background Technology

[0002] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, message delivery, and broadcasting. By sharing available system resources (e.g., time, frequency, and power), these wireless communication systems can support communication with multiple users. Examples of such multi-access systems include fourth-generation (4G) systems, such as Long-Term Evolution (LTE) systems, and fifth-generation (5G) systems, which may be called New Radio (NR) systems. A wireless multi-access communication system can include many base stations or network access nodes, each of which simultaneously supports communication with multiple communication devices, referred to as user equipment (UE).

[0003] Wireless communication networks may include base stations capable of supporting communication with UEs. UEs can communicate with base stations via downlink and uplink. Downlink refers to the communication link from the base station to the UE, while uplink refers to the communication link from the UE to the base station. In wireless communication systems operating at high frequencies, paging transmission / reception increases signaling overhead and UE power consumption. Furthermore, whether a UE can use uplink (UL) authorization from any serving cell to transmit beam failure recovery (BFR) medium access control (MAC) control elements (CE), or whether a UE should be restricted from transmitting BFR MAC CEs for one or more failed serving cells, remains an open question.

[0004] Therefore, there is a need for a wireless communication method and apparatus (e.g., user equipment (UE) and / or base station) that can solve the problems in the prior art, provide MAC CE and / or scheduling request (SR) transmission for BFR, and provide excellent communication performance and / or high reliability. Summary of the Invention

[0005] One object of this application is to provide a wireless communication method and apparatus (e.g., user equipment (UE) and / or base station) that can solve the problems in the prior art, provide media access control (MAC) control element (CE) and scheduling request (SR) transmission for beam fault recovery (BFR), and provide excellent communication performance and / or high reliability.

[0006] In a first aspect of this application, a wireless communication method performed by a user equipment (UE) includes: if the UE determines that at least one beam fault recovery (BFR) has been triggered and not canceled, then the UE performs one or more of generating a BFR media access control (MAC) control element (CE) and triggering a scheduling request (SR) for the BFR.

[0007] In a second aspect of this application, a wireless communication method performed by a base station includes: if the base station determines that at least one beam fault recovery (BFR) has been triggered and not canceled, the base station receives one or more of a BFR media access control (MAC) control element (CE) and a scheduling request (SR) for the BFR from a user equipment (UE).

[0008] In a third aspect of this application, a user equipment (UE) includes: a memory; a transceiver; and a processor coupled to the memory and the transceiver. If the processor determines that at least one beam fault recovery (BFR) has been triggered and not canceled, the processor performs one or more of generating a BFR media access control (MAC) control element (CE) and triggering a scheduling request (SR) for the BFR.

[0009] In a fourth aspect of this application, a base station includes: a memory; a transceiver; and a processor coupled to the memory and the transceiver. If the processor determines that at least one beam fault recovery (BFR) has been triggered and not canceled, the transceiver receives one or more of a BFR media access control (MAC) control element (CE) and a scheduling request (SR) for the BFR from a user equipment (UE).

[0010] In a fifth aspect of this application, a non-transitory computer-readable storage medium is provided, having stored instructions that, when executed by a computer, cause the computer to perform the above-described method.

[0011] In a sixth aspect of this application, a chip includes a processor configured to invoke and run a computer program stored in a memory, causing a device on which the chip is installed to perform the above-described method.

[0012] In a seventh aspect of this application, a computer-readable storage medium is provided having a computer program stored thereon, wherein the computer program causes a computer to perform the above-described method.

[0013] In an eighth aspect of this application, a computer program product includes a computer program, wherein the computer program causes a computer to perform the above-described method.

[0014] In a ninth aspect of this application, a computer program is provided, wherein the computer program causes a computer to perform the above-described method. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this application or related technologies, the following figures will be used to describe the embodiments, and will be briefly introduced below. It is obvious that the figures only represent some embodiments of this application, and those skilled in the art can derive other figures based on these figures without making any assumptions.

[0016] Figure 1 A block diagram is shown of one or more user equipments (UEs) and a base station performing wireless communication in a communication network system according to an embodiment of the present disclosure.

[0017] Figure 2 A flowchart illustrating a wireless communication method performed by a user equipment (UE) according to an embodiment of the present disclosure is shown.

[0018] Figure 3 A flowchart illustrating a wireless communication method performed by a base station according to an embodiment of the present disclosure is shown.

[0019] Figure 4 A block diagram of a system for wireless communication according to an embodiment of the present disclosure is shown. Detailed Implementation

[0020] The embodiments of this application will now be described in detail with reference to the accompanying drawings, focusing on their technical solutions, structural features, achieved objectives, and effects. Specifically, the terminology used in the embodiments of this application is only used to describe certain embodiments and is not intended to limit the content of this application.

[0021] In the Radio Layer 1 (RAN1) Liaison Specification (LS), the response regarding beam failure recovery (BFR) for secondary cells (SCells) is discussed below. Question: Can a UE use uplink (UL) grants from any serving cell to transmit a BFR medium access control (MAC) control element (CE), or should there be a restriction preventing the transmission of BFR MAC CEs for one or more failed serving cells? Answer: At least from RAN1's ​​perspective, there is no need to introduce such a restriction on BFR MAC CE transmission in Release 16 (Rel-16). Furthermore, RAN1 does not foresee a strong incentive to further investigate and discuss the lack of BFR MAC CE transmission on failed SCells. Therefore, whether a UE can use uplink (UL) grants from any serving cell to send beam failure recovery (BFR) medium access control (MAC) control element (CE), or whether a UE should be restricted from sending BFR MAC CE for one or more failed serving cells, remains an open question.

[0022] Therefore, some embodiments herein propose a wireless communication method and apparatus (e.g., user equipment (UE) and / or base station) that addresses problems in the prior art, provides MAC CE and / or SR transmission for BFR, and offers superior communication performance and / or high reliability.

[0023] Figure 1The illustration shows one or more user equipments (UEs) and a base station (e.g., gNB or eNB) 20 provided by a communication network system 30 according to embodiments of the present disclosure for wireless communication in some embodiments. The communication network system 30 includes the one or more UEs 10 and the base station 20. The one or more UEs 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13. The base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23. The processor 11 or 21 may be configured to implement the functions, procedures, and / or methods described herein. A radio interface protocol layer may be implemented in the processor 11 or 21. The memory 12 or 22 is operatively coupled to the processor 11 or 21 and stores various information to operate the processor 11 or 21. The transceiver 13 or 23 is operatively coupled to the processor 11 or 21 and transmits and / or receives radio signals.

[0024] Processor 11 or 21 may include application-specific integrated circuits (ASICs), other chipsets, logic circuits, and / or data processing devices. Memory 12 or 22 may include read-only memory (ROM), random access memory (RAM), flash memory, memory cards, storage media, and / or other storage devices. Transceiver 13 or 23 may include baseband circuitry for processing radio frequency signals. When these embodiments are implemented in software, the techniques described herein can be implemented by modules (e.g., programs, functions, etc.) that perform the functions described herein. These modules may be stored in memory 12 or 22 and executed by processor 11 or 21. Memory 12 or 22 may be implemented within processor 11 or 21 or external to processor 11 or 21, in which case those external components may be communicatively coupled to processor 11 or 21 in various ways known in the art.

[0025] In some embodiments, if the processor 11 determines that at least one beam fault recovery (BFR) has been triggered and not canceled, the processor 11 performs one or more of the following actions: generating a BFR media access control (MAC) control element (CE) and triggering a scheduling request (SR) for the BFR. This addresses problems in the prior art by providing MAC CE and / or SR transmissions for BFR, offering superior communication performance and / or high reliability.

[0026] In some embodiments, the processor 11 determines that the at least one BFR has been triggered and not canceled in the BFR procedure. In some embodiments, a BFR MAC CE is generated in a multiplexing and combining procedure. The multiplexing and combining procedure may include a Logical Channel Priority (LCP) procedure. In some embodiments, the BFR MAC CE includes a secondary cell (SCell) BFR MAC CE. In some embodiments, triggering an SR for the BFR includes triggering an SR for the SCell BFR for each SCell in which the BFR has been triggered and not canceled. In some embodiments, the processor 11 generates the BFR MAC CE if uplink shared channel (UL-SCH) resources are available for new transmissions and if the result of the Logical Channel Priority (LCP) indicates that the UL-SCH resources can accommodate the BFR MAC CE plus its sub-header. In some embodiments, the BFR MAC CE includes a truncated BFR MAC CE.

[0027] In some embodiments, if the UL-SCH resource is available for a new transmission, and if the LCP result indicates that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, the processor 11 generates the BFR MAC CE and triggers an SR for the SCell BFR. In some embodiments, the transceiver 13 is allowed to transmit the BFR MAC CE on any UL grant, and if only a UL grant is available on a failed SCell, the processor 11 triggers and controls the transceiver 13 to transmit the BFR MAC CE using the UL grant on the failed SCell, and the processor 11 triggers an SR for the BFR.

[0028] In some embodiments, if there is a UL-SCH resource available for a new transmission only on the failed SCell, and if the LCP result shows that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, then the processor 11 triggers an SR for the SCell BFR. In some embodiments, the transceiver 13 is allowed to transmit the BFR MAC CE on any UL grant other than the UL grant on the failed SCell. In some embodiments, if no UL grant is available except on the failed SCell, then the processor 11 triggers an SR for BFR to obtain a UL grant for BFR MAC CE transmission. In some embodiments, if UL-SCH resources on both the failed and non-failed SCells are available for a new transmission, and if the LCP result shows that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, then the processor 11 generates the BFR MAC CE on the non-failed SCell.

[0029] In some embodiments, if there are available UL grants on both the failed SCell and the non-failed SCell, the processor 11 skips the available UL grant on the failed SCell and uses the available UL grant on the non-failed SCell for BFR MAC CE transmission. In some embodiments, the processor 11 skipping the available UL grant on the failed SCell includes the processor 11 treating the available UL grant on the failed SCell as an invalid UL grant. In some embodiments, if there are multiple available UL grants on the non-failed SCell, the processor 11 can select the UL grant on the non-failed SCell based on one or more of the following: UE implementation; selection of the available UL grant closest in the time domain; and selection of the SCell with the strongest radio conditions.

[0030] In some embodiments, if the processor 21 determines that at least one beam fault recovery (BFR) has been triggered and not canceled, the transceiver 23 receives from the user equipment (UE) 10 one or more of a BFR media access control (MAC) control element (CE) and a scheduling request (SR) for BFR. This addresses problems in the prior art by providing MAC CE and / or SR transmission for BFR, offering superior communication performance and / or high reliability.

[0031] In some embodiments, the processor 21 determines that the at least one BFR has been triggered and not canceled in the BFR procedure. In some embodiments, a BFR MAC CE is generated in the multiplexing and combining procedure. In some embodiments, the BFR MAC CE includes a secondary cell (SCell) BFR MAC CE. In some embodiments, the transceiver 23 receiving an SR for BFR from the UE 10 includes the transceiver 23 receiving an SR for SCell BFR for each SCell where the BFR has been triggered and not canceled from the UE 10. In some embodiments, the transceiver 23 receives the BFR MAC CE from the UE 10 if uplink shared channel (UL-SCH) resources are available for new transmissions and if the logical channel priority (LCP) result indicates that the UL-SCH resources can accommodate the BFR MAC CE plus its sub-header. In some embodiments, the BFR MAC CE includes a truncated BFR MAC CE.

[0032] In some embodiments, if the UL-SCH resource is available for a new transmission, and if the LCP result indicates that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, then the transceiver 23 receives the BFR MAC CE and the SR for SCell BFR from the UE 10. In some embodiments, the transceiver 23 is configured to receive the BFR MAC CE on any UL grant, and if there is only an available UL grant on a failed SCell, then the transceiver 23 receives the BFR MAC CE with the UL grant on the failed SCell from the UE 10, and the transceiver 23 receives the SR for BFR from the UE 10. In some embodiments, if there is UL-SCH resource available for a new transmission only on a failed SCell, and if the LCP result indicates that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, then the transceiver 23 receives the SR for SCell BFR from the UE 10.

[0033] In some embodiments, transceiver 23 is configured to receive the BFR MAC CE on any UL grant other than the UL grant on the failed SCell. In some embodiments, if no UL grant is available except on the failed SCell, transceiver 23 receives an SR for BFR from UE 10, and processor 21 allows UE 10 to acquire a UL grant for BFR MAC CE transmission. In some embodiments, if UL-SCH resources on both the failed and non-failed SCells are available for a new transmission, and if the LCP result indicates that the UL-SCH resources can accommodate the BFR MAC CE plus its sub-header, transceiver 23 receives the BFR MAC CE on the non-failed SCell from UE 10. In some embodiments, if UL grants are available on both the failed and non-failed SCells, the available UL grant on the failed SCell is skipped, and the available UL grant on the non-failed SCell is used for BFR MAC CE transmission. In some embodiments, skipping the available UL grant on the invalid SCell includes treating the available UL grant on the invalid SCell as an invalid UL grant. In some embodiments, if there are multiple available UL grants on the non-invalid SCell, the UL grant on the non-invalid SCell is selected based on one or more of the following: UE implementation; selection of the available UL grant that is closest in the time domain; and selection of the SCell with the strongest radio conditions.

[0034] Figure 2 A wireless communication method 200 performed by a user equipment (UE) 10 according to an embodiment of this disclosure is illustrated. In some embodiments, the method includes: block 202, if the UE 10 determines that at least one beam fault recovery (BFR) has been triggered and not canceled, then the UE 10 performs one or more of generating a BFR media access control (MAC) control element (CE) and triggering a scheduling request (SR) for BFR. This can solve problems in the prior art, providing MAC CE and / or SR transmission for BFR, providing excellent communication performance and / or high reliability.

[0035] In some embodiments, the UE 10 determines that the at least one BFR has been triggered and not canceled during the BFR procedure. In some embodiments, a BFR MAC CE is generated during the multiplexing and combining procedure. In some embodiments, the BFR MAC CE includes a secondary cell (SCell) BFR MAC CE. In some embodiments, triggering an SR for the BFR includes triggering an SR for the SCell BFR for each SCell where the BFR has been triggered and not canceled. In some embodiments, the UE 10 generates the BFR MAC CE if uplink shared channel (UL-SCH) resources are available for new transmissions and if the logical channel priority (LCP) result indicates that the UL-SCH resources can accommodate the BFR MAC CE plus its sub-header. In some embodiments, the BFR MAC CE includes a truncated BFR MAC CE.

[0036] In some embodiments, if the UL-SCH resource is available for a new transmission, and if the LCP result indicates that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, the UE 10 generates the BFR MAC CE and triggers an SR for the SCell BFR. In some embodiments, the UE 10 is allowed to transmit the BFR MAC CE on any UL grant, and if only a UL grant is available on a failed SCell, the UE 10 uses the UL grant on the failed SCell to trigger and transmit the BFR MAC CE, and the UE 10 triggers an SR for the BFR.

[0037] In some embodiments, if there is a UL-SCH resource available for a new transmission only on the failed SCell, and if the LCP result indicates that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, then UE 10 triggers an SR for SCell BFR. In some embodiments, UE 10 is permitted to transmit the BFR MAC CE on any UL grant other than the UL grant on the failed SCell. In some embodiments, if no UL grant is available except on the failed SCell, then UE 10 triggers an SR for BFR to obtain a UL grant for BFR MAC CE transmission.

[0038] In some embodiments, if UL-SCH resources on both the failed and non-failed SCells are available for a new transmission, and if the LCP results indicate that the UL-SCH resources can accommodate the BFR MAC CE plus its sub-header, then the UE 10 generates the BFR MAC CE on the non-failed SCell. In some embodiments, if there are available UL grants on both the failed and non-failed SCells, then the UE 10 skips the available UL grant on the failed SCell and uses the available UL grant on the non-failed SCell for BFR MAC CE transmission. In some embodiments, the UE 10 skipping the available UL grant on the failed SCell includes the UE 10 treating the available UL grant on the failed SCell as an invalid UL grant. In some embodiments, if there are multiple available UL grants on the non-failed SCell, the UE 10 can select the UL grant on the non-failed SCell based on one or more of the following: UE implementation; selection of the available UL grant closest in the time domain; and selection of the SCell with the strongest radio conditions.

[0039] Figure 3 A wireless communication method 300 performed by a base station 20 according to an embodiment of this disclosure is illustrated. In some embodiments, the method 300 includes: block 302, whereby if the base station 20 determines that at least one beam fault recovery (BFR) has been triggered and not canceled, the base station 20 receives one or more of a BFR media access control (MAC) control element (CE) and a scheduling request (SR) for BFR from a user equipment (UE) 10. This can solve problems in the prior art, providing MAC CE and / or SR transmission for BFR, providing excellent communication performance and / or high reliability.

[0040] In some embodiments, the determination by base station 20 that the at least one BFR has been triggered and not cancelled is determined in the BFR procedure. In some embodiments, a BFR MAC CE is generated in the multiplexing and combining procedure. In some embodiments, the BFR MAC CE includes a secondary cell (SCell) BFR MAC CE. In some embodiments, the base station 20 receiving an SR for BFR from the UE 10 includes the base station 20 receiving an SR for SCell BFR for each SCell where the BFR has been triggered and not cancelled from the UE 10. In some embodiments, the base station 20 receives the BFR MAC CE from the UE 10 if uplink shared channel (UL-SCH) resources are available for new transmissions and if the logical channel priority (LCP) result indicates that the UL-SCH resources can accommodate the BFR MAC CE plus its sub-header. In some embodiments, the BFR MAC CE includes a truncated BFR MAC CE.

[0041] In some embodiments, if UL-SCH resources are available for a new transmission, and if the LCP result indicates that the UL-SCH resources can accommodate the BFR MAC CE plus its sub-header, then base station 20 receives the BFR MAC CE and the SR for SCell BFR from UE 10. In some embodiments, base station 20 is configured to receive the BFR MAC CE on any UL grant, and if there is an available UL grant only on a failed SCell, then base station 20 receives the BFR MAC CE with the UL grant on the failed SCell from UE 10, and base station 20 receives the SR for BFR from UE 10. In some embodiments, if there are UL-SCH resources available for a new transmission only on a failed SCell, and if the LCP result indicates that the UL-SCH resources can accommodate the BFR MAC CE plus its sub-header, then base station 20 receives the SR for SCell BFR from UE 10.

[0042] In some embodiments, the base station 20 is configured to receive the BFR MAC CE on any UL grant other than the UL grant on the failed SCell. In some embodiments, if no UL grant is available except on the failed SCell, the base station 20 receives the SR for BFR from the UE 10 and allows the UE 10 to acquire a UL grant for BFR MAC CE transmission. In some embodiments, if UL-SCH resources on both the failed and non-failed SCells are available for new transmissions, and if the LCP results indicate that the UL-SCH resources can accommodate the BFR MAC CE plus its sub-header, the base station 20 receives the BFR MAC CE on the non-failed SCell from the UE 10. In some embodiments, if UL grants are available on both the failed and non-failed SCells, the available UL grant on the failed SCell is skipped, and the available UL grant on the non-failed SCell is used for BFR MAC CE transmission. In some embodiments, skipping the available UL grant on the invalid SCell includes treating the available UL grant on the invalid SCell as an invalid UL grant. In some embodiments, if there are multiple available UL grants on the non-invalid SCell, the UL grant on the non-invalid SCell is selected based on one or more of the following: UE implementation; selection of the available UL grant that is closest in the time domain; and selection of the SCell with the strongest radio conditions.

[0043] MAC entity:

[0044] Figure 1As shown, in some embodiments, the MAC entity of UE 10 handles the following transport channels: broadcast channel (BCH), one or more downlink shared channels (DL-SCH), paging channel (PCH), one or more uplink shared channels (UL-SCH), and one or more random access channels (RACH). Furthermore, the MAC entity of UE 10 handles the following transport channels on the sidelink: sidelink shared channel (SL-SCH) and sidelink broadcast channel (SL-BCH). When UE 10 is configured with an SCG, two MAC entities are configured for the UE: one for the master cell group (MCG) and one for the secondary cell group (SCG). If a MAC entity is configured with one or more SCells, there are multiple DL-SCHs. It is also possible that each MAC entity has multiple UL-SCHs and multiple RACHs. A special cell (SpCell) may have one DL-SCH, one UL-SCH, and one RACH; each SCell may have one DL-SCH, zero or one UL-SCH, and zero or one RACH. In some embodiments, for dual connectivity operation, the term SpCell refers to the primary cell (PCell) in the MCG or the primary SCell (pSCell) in the SCG, depending on whether the MAC entity is associated with the MCG or the SCG. Otherwise, the term SpCell refers to the PCell. The SpCell supports physical uplink control channel (PUCCH) transmission and contention-based random access and is always active.

[0045] Logical Channel Prioritization (LCP):

[0046] The LCP procedure is applied whenever a new transmission is performed. Radio resource control (RRC) controls the scheduling of uplink data by sending signals for each logical channel of each MAC entity. RRC further controls the LCP procedure by configuring mapping limits for each logical channel. In some embodiments, a BFR MAC CE is generated in the multiplexing and combining procedure. The multiplexing and combining procedure may include a Logical Channel Priority (LCP) procedure.

[0047] Scheduling Request (SR):

[0048] SRs are used to request UL-SCH resources for new transmissions. A MAC entity can be configured with zero or more SR configurations. An SR configuration consists of a set of PUCCH resources for SRs, spanning different bandwidth parts (BWPs) and cells. For a logical channel or for beam failure recovery (BFR), each BWP can be configured with at most one PUCCH resource for an SR. Each SR configuration corresponds to one or more logical channels and / or corresponding BFRs. Each logical channel and BFR can be mapped to zero or one SR configuration, configured by the RRC. When an SR is triggered, it should be considered pending until it is canceled.

[0049] Example:

[0050] Beam fault detection and recovery procedures:

[0051] The MAC entity can be configured with a beamfailure recovery procedure by the RRC of each serving cell. This procedure is used to indicate a new synchronization signal / physical broadcast channel block (SSB) or control state information (CSI)-reference signal (RS) to the serving gNB when a beamfailure is detected on one or more serving SSBs / CSI-RS. Beamfailures are detected by calculating beamfailure instance indications from lower layers to the MAC entity. If beamFailureRecoveryConfig is reconfigured at an upper layer during an ongoing random access procedure for beamfailure recovery of a SpCell, the MAC entity should stop the ongoing random access procedure and initiate a random access procedure with the new configuration.

[0052] Figure 1As shown, in some embodiments, UE 10 transmits SCell BFR MAC CE according to at least one of the following.

[0053] (a) UE 10 is permitted to transmit SCell BFR MAC CE on any UL grant, and if only a UL grant is available on a failed SCell, UE 10 uses the UL grant on the failed SCell to trigger and transmit the BFR MACCE SCell, while simultaneously triggering a BFR SR. In this way, UE 10 can receive UL grant scheduling to prevent the BFR MAC CE transmission from failing.

[0054] (b) UE 10 is permitted to transmit SCell BFRMAC CE on any UL grant other than the UL grant on the failed SCell. If no UL grant is available except on the failed SCell, UE 10 triggers a BFR SR to obtain a UL grant for BFR MAC CE transmission; or, if available UL grants exist on both the failed and non-failed SCell(s), UE 10 skips the available UL grant on the failed SCell(s) (e.g., UE 10 may consider this UL grant invalid) and uses the available UL grant on the non-failed SCell(s) for BFR MAC CE transmission. Furthermore, if multiple available UL grants exist on the non-failed SCell(s), UE 10 may select a UL grant in any of the following ways: UE implementation; selection of the available UL grant closest in the time domain; or selection of the SCell with the strongest radio conditions.

[0055] If the SCell's BFR is triggered, the specifications related to Section 5.17 of 3GPP 38.321 can be added or modified as follows:

[0056] Regarding (a):

[0057] MAC entities should:

[0058] 1> If the Beam Failure Recovery (BFR) procedure determines that at least one BFR has been triggered and not canceled:

[0059] 2> If the UL-SCH resource on the failed SCell is available for a new transmission, and if the Logical Channel Priority (LCP) result indicates that the UL-SCH resource can accommodate the SCell BFR MAC CE plus its sub-header:

[0060] 3> Instruct the multiplexing and combining procedure to generate SCell BFR MAC CE and trigger a scheduling request (SR) for SCell beam fault recovery.

[0061] Regarding (b):

[0062] MAC entities should:

[0063] 1> If the Beam Failure Recovery (BFR) procedure determines that at least one BFR has been triggered and not canceled:

[0064] 2> If only the UL-SCH resource on the failed SCell is available for a new transmission, and if the Logical Channel Priority (LCP) result indicates that the UL-SCH resource can accommodate the SCell BFR MAC CE plus its sub-header:

[0065] 3> Trigger a scheduling request (SR) for SCell beam fault recovery (BFR).

[0066] 2> If the UL-SCH resources on both failed and unfailed SCells are available for a new transmission, and if the Logical Channel Priority (LCP) result indicates that the UL-SCH resources can accommodate the SCell BFR MAC CE plus its sub-header:

[0067] 3> Instruct the reuse and combination procedure to generate SCell BFR MAC CE on a non-failed SCell.

[0068] In addition, the specifications relating to Section 5.17 of 3GPP 38.321 can be added to or modified as follows:

[0069] MAC entities should:

[0070] 1> If the Beam Failure Recovery (BFR) procedure determines that at least one BFR has been triggered and not canceled:

[0071] 2> If the UL-SCH resource is available for the new transmission, and if the LCP results indicate that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header:

[0072] 3> Instructions for multiplexing and combining procedures to generate BFR MAC CE.

[0073] 2> Otherwise, if the UL-SCH resource is available for the new transmission, and if the LCP results indicate that the UL-SCH resource can accommodate the truncated BFR MAC CE plus its sub-header:

[0074] 3> Instruct the multiplexing and combining procedures to generate truncated BFR MAC CE.

[0075] 2> Otherwise:

[0076] 3> For each SCell of a BFR that has been triggered and not canceled, trigger the SR for SCell beam fault recovery.

[0077] In some embodiments, when a MAC protocol data unit (PDU) is transmitted, and the PDU includes a BFR MAC CE or a truncated BFR MAC CE containing beam fault information for the SCell, all BFRs triggered before the combination of MAC PDUs for beam fault recovery of that SCell should be cancelled.

[0078] In some embodiments, once a target receives a status report, the target can retransmit DL data based on the status report, and redundant retransmissions can be avoided by adding a new trigger to the status report.

[0079] Some embodiments offer the following commercial benefits: 1. Solving problems in the prior art. 2. Providing MAC CE and / or SR transmission for BFR. 4. Providing high reliability. 5. Some embodiments of this application are used by 5G-NR chipset suppliers, V2X communication system development suppliers, automobile manufacturers (including cars, trains, trucks, buses, bicycles, motorcycles, helmets, etc.), drone (unmanned aerial vehicle) manufacturers, smartphone manufacturers, communication equipment manufacturers for public safety purposes, and AR / VR device manufacturers (e.g., for gaming, conferences / seminars, educational purposes). Some embodiments of this application are combinations of "technologies / processes" that can be adopted in 3GPP specifications to develop terminal products. Some embodiments of this application can be used in communications in the 5G NR unlicensed frequency band. Some embodiments of this application propose technical solutions.

[0080] Figure 4 This is a block diagram of an example system 700 for wireless communication according to embodiments of the present disclosure. The embodiments described herein can be implemented in this system using any appropriately configured hardware and / or software. Figure 4System 700 is illustrated, comprising radio frequency (RF) circuitry 710, baseband circuitry 720, application circuitry 730, memory / storage device 740, display 750, camera 760, sensor 770, and input / output (I / O) interface 780, which are coupled to each other at least as shown. Application circuitry 730 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 special-purpose processors (e.g., graphics processors and application processors). The processor may be coupled to the memory / storage device and configured to execute instructions stored in the memory / storage device to enable various applications and / or operating systems to run on the system.

[0081] The baseband circuit 720 may include circuitry, such as, but not limited to, one or more single-core or multi-core processors. The processor may include a baseband processor. The baseband circuitry can handle various radio control functions that enable communication with one or more radio networks via RF circuitry. Radio control functions may include, but are not limited to, signal modulation, encoding, decoding, and radio frequency shifting. In some embodiments, the baseband circuitry can provide communication compatible with one or more wireless technologies. For example, in some embodiments, the baseband circuitry may support communication with the Evolved Universal Terrestrial Radio Access Network (EUTRAN) and / or other Wireless Wide Area Networks (WMAN), Wireless Local Area Networks (WLAN), and Wireless Personal Area Networks (WPAN). Embodiments of the baseband circuitry configured to support wireless communication using more than one wireless protocol may be referred to as a multi-mode baseband circuitry.

[0082] In various embodiments, baseband circuitry 720 may include circuitry for operating with signals that are not strictly considered to be in the baseband frequency range. For example, in some embodiments, the baseband circuitry may include circuitry for operating with signals having an intermediate frequency between the baseband frequency and the radio frequency (RF). RF circuitry 710 may use modulated electromagnetic radiation through a non-solid-state medium to achieve communication with a wireless network. In various embodiments, RF circuitry may include switches, filters, amplifiers, etc., to facilitate communication with a wireless network. In various embodiments, RF circuitry 710 may include circuitry for operating with signals that are not strictly considered to be in the RF range. For example, in some embodiments, RF circuitry may include circuitry for operating with signals having an intermediate frequency between the baseband frequency and the RF frequency.

[0083] In various embodiments, the transmitter circuitry, control circuitry, or receiver circuitry discussed above with respect to user equipment, eNB, or gNB may be implemented, in whole or in part, in one or more of the RF circuitry, baseband circuitry, and / or application circuitry. As used herein, “circuit” may refer to, be part of, or include: application-specific integrated circuits (ASICs), electronic circuitry executing one or more software or firmware programs, processors and / or memory (shared, dedicated, or grouped), combined logic circuitry, and / or other suitable hardware components that provide the described functionality. In some embodiments, the electronic device circuitry system may be implemented in one or more software or firmware modules, or the functionality associated with the circuitry system may be implemented by one or more software or firmware modules. In some embodiments, some or all of the components of the baseband circuitry, application circuitry, and / or memory / storage device may be implemented together on a system-on-a-chip (SOC). The memory / storage device 740 may be used to load and store, for example, data and / or instructions for the system. The memory / storage device of one embodiment may include any combination of suitable volatile memory (e.g., dynamic random access memory (DRAM)) and / or non-volatile memory (e.g., flash memory).

[0084] In various embodiments, I / O interface 780 may include one or more user interfaces and / or peripheral component interfaces, the user interfaces being designed to enable a user to interact with the system, and the peripheral component interfaces being designed to enable peripheral components to interact with the system. The user interface may include, but is not limited to, a physical keyboard or keypad, a touchpad, a speaker, a microphone, etc. The peripheral component interface may include, but is not limited to, a non-volatile memory connection port, a universal serial bus (USB) connection port, an audio jack, and a power interface. In various embodiments, sensor 770 may include one or more sensing devices for determining environmental conditions and / or location information relevant to the system. In some embodiments, the sensor may include, but is not limited to, a gyroscope sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit. The positioning unit may also be part of or interact with baseband circuitry and / or RF circuitry to communicate with components of a positioning network (e.g., Global Positioning System (GPS) satellites).

[0085] In various embodiments, display 750 may include displays such as liquid crystal displays and touchscreen displays. In various embodiments, system 700 may be a mobile computing device, such as, but not limited to, laptops, tablets, netbooks, ultrabooks, smartphones, AR / VR glasses, etc. In various embodiments, the system may have more or fewer components and / or different architectures. Where appropriate, the methods described herein may be implemented as computer programs. The computer programs may be stored on storage media such as non-transitory storage media.

[0086] Those skilled in the art will understand that each unit, algorithm, and step described and disclosed in the embodiments of this application can be implemented using electronic hardware or a combination of software and electronic hardware for computers. Whether these functions operate in hardware or software depends on the application conditions and design requirements of the technical solution. Those skilled in the art can implement the functions of each specific application in different ways, and such implementation should not exceed the scope of this application. Those skilled in the art should understand that the working processes of the systems, devices, and units in the above embodiments can be referred to, as the working processes of the above systems, devices, and units are basically the same. For ease of description and brevity, these working processes will not be described in detail.

[0087] It should be understood that the systems, apparatuses, and methods disclosed in the embodiments of this application can be implemented in other ways. The embodiments described above are merely illustrative. The division of units is based solely on logical function, and other divisions may exist in implementation. Multiple units or components may be combined or integrated into another system. Some features may also be omitted or skipped. On the other hand, the mutual coupling, direct coupling, or communication coupling shown or discussed may be indirect coupling or electrical, mechanical, or other forms of communication coupling through some interface, apparatus, or unit.

[0088] The units described as separate components may or may not be physically separate. The units shown may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be used depending on the purpose of the embodiment. Furthermore, the functional units in various embodiments may be integrated into one processing unit, or they may be physically independent, or two or more units may be integrated into one processing unit.

[0089] If software functional units are implemented and sold or used as independent products, they can be stored in a readable storage medium within a computer. Based on this understanding, the technical solutions proposed in this application can be implemented essentially or partially as software products. Alternatively, a portion of a technical solution beneficial to the prior art can be implemented as a software product. Software products in a computer are stored in storage media and include multiple commands for a computing device (e.g., a personal computer, server, or network device) to execute all or part of the steps disclosed in the embodiments of this application. This storage media includes USB flash drives, removable hard drives, read-only memory (ROM), random access memory (RAM), floppy disks, or other media capable of storing program code.

[0090] Although this application has been described in conjunction with what are considered to be the most practical and preferred embodiments, it should be understood that this application is not limited to the disclosed embodiments, but is intended to cover various arrangements made without departing from the broadest interpretation of the appended claims.

Claims

1. A wireless communication method performed by a user equipment (UE), comprising: If the UE determines that at least one beam fault recovery (BFR) has been triggered and not canceled, and the uplink shared channel (UL-SCH) resources are available for new transmissions, and if the logical channel priority (LCP) result indicates that the UL-SCH resources can accommodate the BFR media access control (MAC) control element (CE) plus its subheading, then the UE generates a BFR MAC CE. If the UE determines that at least one BFR has been triggered and not canceled, the UL-SCH resource can be used for a new transmission, and if the LCP result shows that the UL-SCH resource can accommodate the truncated BFR MAC CE plus its sub-header, then the UE generates the truncated BFR MAC CE. Otherwise, if the UE determines that at least one BFR has been triggered and not canceled, it triggers a scheduling request (SR) for the SCell BFR for each minor cell (SCell) where the BFR has been triggered and not canceled.

2. The method according to claim 1, characterized in that: The fact that at least one BFR has been triggered and not canceled is determined in the BFR procedure.

3. The method according to claim 1 or 2, characterized in that: The BFR MAC CE is generated during the reuse and composition process.

4. The method according to claim 1 or 2, characterized in that: The BFR MAC CE includes SCell BFR MACCE.

5. The method according to claim 1 or 2, characterized in that: If the UL-SCH resource is available for a new transmission, and if the LCP result indicates that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, the UE generates the BFR MAC CE and triggers the SR for the SCell BFR.

6. The method according to claim 1 or 2, characterized in that: The UE is allowed to send the BFR MAC CE on any uplink (UL) grant, and if there is only an available UL grant on a failed SCell, the UE uses the UL grant on the failed SCell to trigger and send the BFR MAC CE, and the UE triggers an SR for BFR.

7. The method according to claim 1 or 2, characterized in that: If there is a UL-SCH resource available for a new transmission only on the failed SCell, and if the LCP results show that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, then the UE triggers an SR for the SCell BFR.

8. The method according to claim 1 or 2, characterized in that: The UE is permitted to send the BFR MAC CE on any UL authorization other than the UL authorization on the invalid SCell.

9. The method according to claim 8, characterized in that: If no UL authorization is available except in the failed SCell, the UE triggers an SR for BFR to obtain UL authorization and perform BFR MAC CE transmission.

10. The method according to claim 1 or 2, characterized in that: If the UL-SCH resources on both the failed and non-failed SCells are available for a new transmission, and if the LCP results indicate that the UL-SCH resources can accommodate the BFR MAC CE plus its sub-header, then the UE generates the BFR MAC CE on the non-failed SCell.

11. The method according to claim 1 or 2, characterized in that: If a UL grant is available on both a failed SCell and a non-failed SCell, the UE skips the available UL grant on the failed SCell and uses the available UL grant on the non-failed SCell for BFR MAC CE transmission.

12. The method according to claim 11, characterized in that: The UE skipping the available UL authorization on the invalid SCell includes the UE treating the available UL authorization on the invalid SCell as an invalid UL authorization.

13. The method according to claim 11, characterized in that: If there are multiple available UL licenses on the non-invalid SCell, the UE can select the UL license on the non-invalid SCell according to one or more of the following: UE implementation; Select the available UL license that is closest in the time domain; and Choose the SCell with the strongest radio conditions.

14. A wireless communication method performed by a base station, comprising: If the base station determines that at least one BFR has been triggered and not canceled, the UL-SCH resource can be used for a new transmission, and if the LCP result shows that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, then the base station receives the BFR MAC CE from the UE. If the base station determines that at least one BFR has been triggered and not canceled, the UL-SCH resource can be used for a new transmission, and if the LCP result shows that the UL-SCH resource can accommodate the truncated BFR MAC CE plus its sub-header, then the base station receives the truncated BFR MAC CE from the UE. Otherwise, if the base station determines that at least one BFR has been triggered and not canceled, the base station receives from the UE an SR for each SCell BFR for which a BFR has been triggered and not canceled.

15. The method according to claim 14, characterized in that: The fact that at least one BFR has been triggered and not canceled is determined in the BFR procedure.

16. The method according to claim 14 or 15, characterized in that: The BFR MAC CE is generated during the reuse and composition process.

17. The method according to claim 14 or 15, characterized in that: The BFR MAC CE includes SCell BFRMAC CE.

18. The method according to claim 14 or 15, characterized in that: If the UL-SCH resource is available for a new transmission, and if the LCP results indicate that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, then the base station receives the BFR MAC CE and the SR for SCell BFR from the UE.

19. The method according to claim 14 or 15, characterized in that: The base station is configured to receive the BFR MAC CE on any UL grant, and if there is only an available UL grant on a failed SCell, the base station receives the BFR MAC CE with the UL grant on the failed SCell from the UE, and the base station receives the SR for BFR from the UE.

20. The method according to claim 14 or 15, characterized in that: If there are UL-SCH resources available for new transmissions only on the failed SCell, and if the LCP results indicate that the UL-SCH resources can accommodate the BFR MAC CE plus its sub-header, then the base station receives the SR for the SCell BFR from the UE.

21. The method according to claim 14 or 15, characterized in that: The base station is configured to receive the BFR MAC CE on any UL license other than the UL license on the invalid SCell.

22. The method according to claim 21, characterized in that: If no UL authorization is available except in the failed SCell, the base station receives an SR for BFR from the UE and allows the UE to obtain UL authorization for BFRMAC CE transmission.

23. The method according to claim 14 or 15, characterized in that: If the UL-SCH resources on both the failed and unfailed SCells are available for a new transmission, and if the LCP results indicate that the UL-SCH resources can accommodate the BFR MAC CE plus its sub-header, then the base station receives the BFR MAC CE on the unfailed SCell from the UE.

24. The method according to claim 14 or 15, characterized in that: If a UL license is available on both a failed SCell and a non-failed SCell, the available UL license on the failed SCell is skipped, and the BFR MAC CE transfer is performed using the available UL license on the non-failed SCell.

25. The method according to claim 24, characterized in that: Skipping the available UL authorization on the invalid SCell includes treating the available UL authorization on the invalid SCell as an invalid UL authorization.

26. The method according to claim 24, characterized in that: If multiple UL licenses are available on the non-invalid SCell, the UL license on the non-invalid SCell is selected according to one or more of the following: UE implementation; Select the available UL license that is closest in the time domain; and Choose the SCell with the strongest radio conditions.

27. A UE, comprising: Memory; transceiver; and The processor is coupled to the memory and the transceiver; If the processor determines that at least one BFR has been triggered and not canceled, the UL-SCH resource can be used for a new transmission, and if the LCP result shows that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, then the processor generates the BFR MAC CE. If the processor determines that at least one BFR has been triggered and not canceled, the UL-SCH resource can be used for a new transmission, and if the LCP result shows that the UL-SCH resource can accommodate the truncated BFR MAC CE plus its sub-header, then the processor generates the truncated BFR MAC CE. Otherwise, if the processor determines that at least one BFR has been triggered and not canceled, it triggers an SR for the SCell BFR for each SCell where the BFR has been triggered and not canceled.

28. The UE according to claim 27, characterized in that: The fact that at least one BFR has been triggered and not canceled is determined in the BFR procedure.

29. The UE according to claim 27 or 28, characterized in that: The BFR MAC CE is generated during the reuse and composition process.

30. The UE according to claim 27 or 28, characterized in that: The BFR MAC CE includes SCell BFR MACCE.

31. The UE according to claim 27 or 28, characterized in that: If the UL-SCH resource is available for a new transmission, and if the LCP result indicates that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, the processor generates the BFR MAC CE and triggers the SR for the SCell BFR.

32. The UE according to claim 27 or 28, characterized in that: The transceiver is allowed to transmit the BFR MAC CE on any UL grant, and if only a UL grant is available on a failed SCell, the processor triggers and controls the transceiver to transmit the BFR MAC CE using the UL grant on the failed SCell, and the processor triggers an SR for the BFR.

33. The UE according to claim 27 or 28, characterized in that: If there is a UL-SCH resource available for a new transmission only on the failed SCell, and if the LCP results show that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, then the processor triggers an SR for the SCell BFR.

34. The UE according to claim 27 or 28, characterized in that: The transceiver is permitted to transmit the BFR MAC CE on any UL authorization other than the UL authorization on the invalid SCell.

35. The UE according to claim 34, characterized in that: If no UL authorization is available except in the failed SCell, the processor triggers an SR for BFR to obtain UL authorization and perform BFR MAC CE transfer.

36. The UE according to claim 27 or 28, characterized in that: If the UL-SCH resources on both the failed and non-failed SCells are available for a new transmission, and if the LCP results indicate that the UL-SCH resources can accommodate the BFR MAC CE plus its sub-header, then the processor generates the BFR MAC CE on the non-failed SCell.

37. The UE according to claim 27 or 28, characterized in that: If a UL license is available on both a failed SCell and a non-failed SCell, the processor skips the available UL license on the failed SCell and uses the available UL license on the non-failed SCell to perform BFR MAC CE transmission.

38. The UE according to claim 37, characterized in that: The processor skipping the available UL license on the invalid SCell includes the processor treating the available UL license on the invalid SCell as an invalid UL license.

39. The UE according to claim 37, characterized in that: If multiple UL licenses are available on the non-invalid SCell, the processor can select the UL license on the non-invalid SCell according to one or more of the following: UE implementation; Select the available UL license that is closest in the time domain; and Choose the SCell with the strongest radio conditions.

40. A base station, comprising: Memory; transceiver; and The processor is coupled to the memory and the transceiver; If the processor determines that at least one BFR has been triggered and not canceled, the UL-SCH resource can be used for a new transmission, and if the LCP result shows that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, then the processor receives the BFR MAC CE from the UE. If the processor determines that at least one BFR has been triggered and not canceled, the UL-SCH resource can be used for a new transmission, and if the LCP result shows that the UL-SCH resource can accommodate the truncated BFR MAC CE plus its sub-header, then the processor receives the truncated BFR MAC CE from the UE. Otherwise, if the base station determines that at least one BFR has been triggered and not canceled, the processor receives from the UE an SR for each SCell BFR for which a BFR has been triggered and not canceled.

41. The base station according to claim 40, characterized in that: The fact that at least one BFR has been triggered and not canceled is determined in the BFR procedure.

42. The base station according to claim 40 or 41, characterized in that: The BFR MAC CE is generated during the reuse and composition process.

43. The base station according to claim 40 or 41, characterized in that: The BFR MAC CE includes SCell BFRMAC CE.

44. The base station according to claim 40 or 41, characterized in that: If the UL-SCH resource is available for a new transmission, and if the LCP result indicates that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, then the transceiver receives the BFR MAC CE and the SR for SCell BFR from the UE.

45. The base station according to claim 40 or 41, characterized in that: The transceiver is configured to receive the BFR MAC CE on any UL grant, and if there is only an available UL grant on a failed SCell, the transceiver receives the BFR MAC CE with the UL grant on the failed SCell from the UE, and the transceiver receives the SR for BFR from the UE.

46. ​​The base station according to claim 40 or 41, characterized in that: If there is a UL-SCH resource available for a new transmission only on the failed SCell, and if the LCP results indicate that the UL-SCH resource can accommodate the BFR MAC CE plus its sub-header, then the transceiver receives the SR for the SCell BFR from the UE.

47. The base station according to claim 40 or 41, characterized in that: The transceiver is configured to receive the BFR MAC CE on any UL license other than the one on the invalid SCell.

48. The base station according to claim 47, characterized in that: If no UL authorization is available except in the failed SCell, the transceiver receives an SR for BFR from the UE, and the processor allows the UE to acquire UL authorization for BFR MAC CE transmission.

49. The base station according to claim 40 or 41, characterized in that: If the UL-SCH resources on both the failed and unfailed SCells are available for a new transmission, and if the LCP results indicate that the UL-SCH resources can accommodate the BFR MAC CE plus its sub-header, then the transceiver receives the BFR MAC CE on the unfailed SCell from the UE.

50. The base station according to claim 40 or 41, characterized in that: If a UL license is available on both a failed SCell and a non-failed SCell, the available UL license on the failed SCell is skipped, and the BFR MAC CE transfer is performed using the available UL license on the non-failed SCell.

51. The base station according to claim 50, characterized in that: Skipping the available UL authorization on the invalid SCell includes treating the available UL authorization on the invalid SCell as an invalid UL authorization.

52. The base station according to claim 50, characterized in that: If multiple UL licenses are available on the non-invalid SCell, the UL license on the non-invalid SCell is selected according to one or more of the following: UE implementation; Select the available UL license that is closest in the time domain; and Choose the SCell with the strongest radio conditions.

53. A non-transitory computer-readable storage medium having instructions stored thereon that, when executed by a computer, cause the computer to perform the method according to any one of claims 1 to 26.

54. A chip, comprising: A processor configured to invoke and run a computer program stored in memory, causing a device with the chip mounted to perform the method according to any one of claims 1 to 26.

55. A computer-readable storage medium having a computer program stored thereon, wherein the computer program causes a computer to perform the method according to any one of claims 1 to 26.

56. A computer program product comprising a computer program, wherein the computer program causes a computer to perform the method according to any one of claims 1 to 26.

57. A computer program that causes a computer to perform the method according to any one of claims 1 to 26.

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