Multiplexing beam failure recovery requests for secondary cells

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, user equipment (UE) detects a collision between a beam failure recovery request (BFRQ) transmission and another uplink transmission to trigger beam failure recovery for a secondary cell on an uplink channel; and on an uplink channel, transmit at least one of the BFRQ transmission or the other uplink transmission based at least partially on a multiplexing rule. Many other aspects are provided.

Description

Technology Field

[0001] This patent application claims priority to U.S. Provisional Application No. 62 / 902,730, filed September 19, 2019, under the title "BEAM FAILURE RECOVER REQUEST MULTIPLEXING FOR SECONDARY CELLS" and U.S. Regular Application No. 16 / 948,242, filed September 9, 2020, under the title "BEAM FAILURE RECOVER REQUEST MULTIPLEXING FOR SECONDARY CELLS", by which said applications are expressly incorporated herein by reference.

[0002] Aspects of the present disclosure generally relate to wireless communication and techniques and apparatus for multiplexing beam failure recovery requests for secondary cells. Background Technology

[0003] Wireless communication systems are widely deployed to provide various communication services such as telephony, video, data, messaging, and broadcast. Conventional wireless communication systems may use multiple-access technologies that support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-A (LTE-Advanced) is a set of enhancements to the UMTS (Universal Mobile Telecommunications System) mobile standard published by the 3GPP (Third Generation Partnership Project).

[0004] A wireless communication network may include a number of base stations (BS) capable of supporting communication for a number of user equipment (UE). User equipment (UE) can communicate with the base station (BS) via a downlink and an uplink. A downlink (or forward link) refers to a communication link from the BS to the UE, and an uplink (or reverse link) refers to a communication link from the UE to the BS. As described in more detail herein, the BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), New Radio (NR) BS, 5G Node B, etc.

[0005] The above multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different UEs (user equipment) to communicate at the city, national, regional, and even global levels. New Radio (NR), which can also be referred to as 5G, is a set of improvements to the LTE mobile standard published by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband internet access by using orthogonal frequency division multiplexing (CP-OFDM) with a cyclic prefix (CP) on the downlink (DL) and CP-OFDM and / or SC-FDM (also known as discrete Fourier transform spread OFDM, e.g., DFT-s-OFDM) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna techniques and carrier aggregation, thereby improving spectrum efficiency, lowering costs, enhancing services, utilizing new spectrum, and integrating better with other open standards. However, as the demand for mobile broadband access continues to increase, there is a need for additional improvements in LTE and NR technologies. Preferably, these improvements should be applicable to other multiple access technologies and telecommunication standards that use these technologies.

[0006] In some aspects, a wireless communication method performed by a UE (user equipment) may include: detecting a collision between a beam failure recovery request (BFRQ) transmission and another uplink transmission to trigger beam failure recovery for a secondary cell on an uplink channel; and transmitting at least one of the BFRQ transmission or the other uplink transmission on an uplink channel based at least partially on a multiplexing rule.

[0007] In some aspects, the UE for wireless communication may include a memory and one or more processors operably coupled to the memory. The memory and the one or more processors may be configured to detect a collision between a BFRQ transmission and another uplink transmission to trigger beam failure recovery for a secondary cell on an uplink channel; and to transmit at least one of the BFRQ transmission or the other uplink transmission on an uplink channel based at least partially on a multiplexing rule.

[0008] In some aspects, a non-transient computer-readable medium may store one or more commands for wireless communication. When executed by one or more processors of a UE, the one or more commands may cause the processors to detect a collision between a BFRQ transmission and another uplink transmission to trigger beam failure recovery for a secondary cell on an uplink channel; and may cause at least one of the BFRQ transmission or the other uplink transmission to be transmitted on an uplink channel at least partially based on a multiplexing rule.

[0009] In some aspects, the device for wireless communication may include means for detecting a collision between a BFRQ transmission and another uplink transmission to trigger beam failure recovery for a secondary cell on an uplink channel; and means for transmitting at least one of the BFRQ transmission or another uplink transmission on an uplink channel based at least partially on a multiplexing rule.

[0010] Aspects generally include methods, apparatus, systems, computer program products, non-transient computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems, which are illustrated by and substantially described herein with reference to the attached drawings, specifications, and appendices.

[0011] The foregoing has broadly summarized the features and technical advantages of the examples according to the present disclosure so that the following detailed description may be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples may be readily utilized as a basis for modifying or designing other structures to perform the same purposes of the present disclosure. Such equivalent configurations do not depart from the scope of the appended claims. Both the features of the concepts disclosed herein, their structures, and methods of operation will be better understood from the following description when considered in conjunction with the appended drawings, along with their associated advantages. Each drawing is provided for the purpose of illustration and explanation, not as a definition of the limitations of the claims. Brief explanation of the drawing

[0012] In order to enable a detailed understanding of the features of the present disclosure mentioned above, a more specific description, briefly summarized above, may be made with reference to aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings illustrate only specific ordinary aspects of the present disclosure and should not be construed as limiting the scope of the present disclosure, as the description may allow for other equally valid aspects. Identical reference numbers in different drawings may identify identical or similar elements.

[0013] FIG. 1 is a block diagram conceptually illustrating an example of a wireless communication network according to various aspects of the present disclosure.

[0014] FIG. 2 is a block diagram conceptually illustrating an example of a base station communicating with a UE in a wireless communication network according to various aspects of the present disclosure.

[0015] FIG. 3 is a diagram illustrating an example of wireless communication through one or more beams according to various aspects of the present disclosure.

[0016] FIG. 4 is a diagram illustrating an example of a beam failure recovery procedure according to various aspects of the present disclosure.

[0017] FIG. 5 is a diagram illustrating an example of beam failure recovery request multiplexing for secondary cells according to various aspects of the present disclosure.

[0018] FIG. 6 is a diagram illustrating an exemplary process performed, for example, by user equipment, according to various aspects of the present disclosure. Specific details for implementing the invention

[0019] Various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure may be embodied in many different forms and should not be interpreted as being limited to any specific structure or function presented throughout the present disclosure. Rather, such aspects are provided so that the present disclosure may be thorough and complete and so that the scope of the disclosure may be fully conveyed to those skilled in the art. Based at least in part on the teachings herein, those skilled in the art should recognize that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether it is embodied independently of any other aspect of the disclosure or in combination with any other aspect. For example, an apparatus may be embodied or a method may be practiced using any number of aspects described herein. Furthermore, the scope of the disclosure is intended to cover any structure, function, or such apparatus or method practiced using any other structure and function in addition to or other than the various aspects of the disclosure described herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of the claims.

[0020] Some aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and will be illustrated in the attached drawings by various blocks, modules, components, circuits, stages, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the design constraints imposed on the overall system and the specific application.

[0021] Although aspects may be described herein using terms commonly associated with 3G and / or 4G wireless technologies, it should be noted that aspects of the present disclosure may be applicable to other generation-based communication systems, such as 5G and future generations, including NR technologies.

[0022] FIG. 1 is a diagram illustrating a wireless network (100) in which aspects of the present disclosure may be implemented. The wireless network (100) may be an LTE network, or some other wireless network such as a 5G or NR network. The wireless network (100) may include a plurality of BSs (110) (illustrated as BS (110a), BS (110b), BS (110c) and BS (110d)) and other network entities. A BS is an entity that communicates with UEs (user equipment) and may also be referred to as a base station, NR BS, Node B, gNB, 5G node B (NB), access point, TRP (transmit receive point), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term “cell” may refer to the coverage area of ​​a BS and / or a BS subsystem serving this coverage area, depending on the context in which the term is used.

[0023] A BS can provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. Macro cells can cover a relatively large geographical area (e.g., a radius of several kilometers) and enable unrestricted access by UEs subscribed to the service. Pico cells can cover a relatively small geographical area and enable unrestricted access by UEs subscribed to the service. Femto cells can cover a relatively small geographical area (e.g., a home) and enable restricted access by UEs associated with the femto cell (e.g., UEs within a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In the example illustrated in FIG. 1, BS (110a) may be a macro BS for a macro cell (102a), BS (110b) may be a pico BS for a pico cell (102b), and BS (110c) may be a femto BS for a femto cell (102c). A BS may support one or more (e.g., three) cells. The terms "eNB," "base station," "NR BS," "gNB," "TRP," "AP," "node B," "5G NB," and "cell" may be used interchangeably herein.

[0024] In some aspects, the cell may not necessarily be fixed, and the geographical area of ​​the cell may move according to the location of the mobile BS. In some aspects, the BSs may be interconnected to one or more other BSs or network nodes (not shown) in the wireless network (100) and / or interconnected with each other through various types of backhaul interfaces, such as direct physical connections, virtual networks, etc., using any suitable transmission network.

[0025] The wireless network (100) may also include relay stations. A relay station is an entity capable of receiving transmissions of data from an upstream station (e.g., BS or UE) and transmitting transmissions of data to a downstream station (e.g., UE or BS). A relay station may also be a UE capable of relaying transmissions to other UEs. In the example illustrated in FIG. 1, the relay station (110d) may communicate with the macro BS (110a) and the UE (120d) to enable communication between the BS (110a) and the UE (120d). The relay station may also be referred to as a relay BS, a relay base station, a repeater, etc.

[0026] The wireless network (100) may be a heterogeneous network including different types of BSs, such as macro BSs, pico BSs, femto BSs, relay BSs, etc. These different types of BSs may have different transmission power levels, different coverage areas, and different effects on interference in the wireless network (100). For example, macro BSs may have high transmission power levels (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs may have lower transmission power levels (e.g., 0.1 to 2 watts).

[0027] A network controller (130) can be coupled to a set of BSs and can provide coordination and control for these BSs. The network controller (130) can communicate with the BSs via a backhaul. The BSs can also communicate with each other indirectly or directly, for example, via a wireless or wired backhaul.

[0028] UEs (120) (e.g., 120a, 120b, 120c, 120d, 120e) may be scattered throughout the wireless network (100), and each UE may be fixed or mobile. A UE may also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. The UE may be a cellular phone (e.g., smartphone), PDA (personal digital assistant), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, WLL (wireless local loop) station, tablet, camera, gaming device, netbook, smartbook, ultrabook, medical device or equipment, biometric sensors / devices, wearable devices (smart watches, smart clothing, smart glasses, smart wristbands, smart jewelry (e.g., smart rings, smart bracelets)), entertainment device (e.g., music or video device, or satellite radio), vehicle component or sensor, smart meter / sensor, industrial manufacturing equipment, global positioning system device, or any other suitable device configured to communicate via wireless or wired media.

[0029] Some UEs may be considered as machine-type communication (MTC) or eMTC (evolved or enhanced machine-type communication) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which can communicate with a base station, other devices (e.g., remote devices), or some other entity. Wireless nodes may provide a connection to or from a network (e.g., a wide-area network such as the Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered as Internet-of-Things (IoT) devices and / or may be implemented as narrowband Internet of Things (NB-IoT) devices. Some UEs may be considered as Customer Premises Equipment (CPE). A UE (120) may be contained within a housing that houses components of the UE (120), such as processor components, memory components, etc.

[0030] Generally, any number of wireless networks may be deployed in a given geographical area. Each wireless network may support a specific RAT and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, air interface, etc. A frequency may also be referred to as a carrier, frequency channel, etc. Each frequency may support a single RAT in a given geographical area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0031] In some aspects, two or more UEs (120) (e.g., illustrated as UE (120a) and UE (120e)) may communicate directly using one or more sidelink channels (e.g., without using the base station (110) as an intermediary to communicate with each other). For example, the UEs (120) may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, mesh networks, etc. In this case, the UE (120) may perform scheduling operations, resource selection operations and / or other operations described elsewhere in the present invention as performed by the base station (110).

[0032] As indicated above, FIG. 1 is provided as an example. Other examples may differ from those described in relation to FIG. 1.

[0033] FIG. 2 illustrates a block diagram of a design (200) of a base station (110) and a UE (120) that may be one of the base stations and one of the UEs in FIG. 1. The base station (110) may be equipped with T antennas (234a to 234t) and the UE (120) may be equipped with R antennas (252a to 252r), wherein, generally, T ≥ 1 and R ≥ 1.

[0034] At the base station (110), the transmitting processor (220) receives data for one or more UEs from a data source (212), selects one or more modulation and coding schemes (MCS) for each UE based at least partially on channel quality indicators (CQI) received from the UE, processes data for each UE (e.g., encoding and modulation) based at least partially on the selected MCS(s) for the UE, and can provide data symbols for all UEs. The transmitting processor (220) can also process system information (e.g., semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and can provide overhead symbols and control symbols. The transmitting processor (220) may also generate reference symbols for reference signals (e.g., CRS (cell-specific reference signal)) and synchronization signals (e.g., PSS (primary synchronization signal) and SSS (secondary synchronization signal)). The transmitting (TX) MIMO (multiple-input multiple-output) processor (230) may, where applicable, perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols and / or reference symbols, and may provide T output symbol streams to T modulators (MODs) (232a to 232t). Each modulator (232) may process individual output symbol streams (e.g., for OFDM, etc.) to obtain output sample streams.Each modulator (232) may further process the output sample stream (e.g., convert to analog, amplify, filter, and upconvert) to obtain a downlink signal. T downlink signals from the modulators (232a to 232t) may each be transmitted through T antennas (234a to 234t). According to various aspects described in more detail below, synchronization signals may be generated with location encoding to convey additional information.

[0035] In the UE (120), antennas (252a to 252r) may receive downlink signals from the base station (110) and / or other base stations and may provide the received signals to each demodulator (254a to 254r). Each demodulator (254) may condition the received signal (e.g., filtering, amplification, downconversion, and digitization) to obtain input samples. Each demodulator (254) may further process the input samples (e.g., for OFDM, etc.) to obtain the received symbols. A MIMO detector (256) may obtain the symbols received from all R demodulators (254a to 254r), perform MIMO detection on the received symbols where applicable, and provide the detected symbols. The receiving processor (258) can process the detected symbols (e.g., demodulate and decode), provide the decoded data for the UE (120) to the data sink (260), and provide the decoded control information and system information to the controller / processor (280). The channel processor can determine the RSRP (reference signal received power), RSSI (received signal strength indicator), RSRQ (reference signal received quality), CQI (channel quality indicator), etc. In some aspects, one or more components of the UE (120) may be included in the housing.

[0036] On the uplink, at the UE (120), a transmitting processor (264) may receive and process data from a data source (262) and control information (e.g., reports including RSRP, RSSI, RSRQ, CQI, etc.) from a controller / processor (280). The transmitting processor (264) may also generate reference symbols for one or more reference signals. Symbols from the transmitting processor (264) may, where applicable, be precoded by a TX MIMO processor (266), further processed by modulators (254a to 254r) (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to a base station (110). In the base station (110), in order to obtain decoded data and control information transmitted by the UE (120), uplink signals from the UE (120) and other UEs are received by antennas (234), processed by demodulators (232), detected by a MIMO detector (236) where applicable, and can be further processed by a receiving processor (238). The receiving processor (238) can provide the decoded data to a data sink (239) and the decoded control information to a controller / processor (240). The base station (110) includes a communication unit (244) and can communicate with a network controller (130) through the communication unit (244). The network controller (130) may include a communication unit (294), a controller / processor (290), and a memory (292).

[0037] The controller / processor (240) of the base station (110), the controller / processor (280) of the UE (120), and / or any other component(s) of FIG. 2 may perform one or more techniques associated with beam failure recovery request (BFRQ) multiplexing for secondary cells, as described in more detail elsewhere in this invention. For example, the controller / processor (240) of the base station (110), the controller / processor (280) of the UE (120), and / or any other component(s) of FIG. 2 may perform or direct the operations of, for example, the process (600) of FIG. 6, and / or other processes as described herein. Memories (242 and 282) may each store data and program codes for the base station (110) and the UE (120). In some aspects, the memory (242) and / or memory (282) may comprise a non-transient computer-readable medium that stores one or more instructions for wireless communication. For example, the one or more instructions may perform or direct operations of, for example, the process (600) of FIG. 6 and / or other processes as described herein when executed by one or more processors of the base station (110) and / or UE (120). The scheduler (246) may schedule UEs for data transmission over the downlink and / or uplink.

[0038] In some aspects, the UE (120) may include means for detecting a collision between a BFRQ transmission and another uplink transmission to trigger beam failure recovery for a secondary cell on an uplink channel, means for transmitting at least one of the BFRQ transmission or the other uplink transmission on an uplink channel based at least partially on a multiplexing rule, etc. In some aspects, such means may include one or more components of the UE (120) described in relation to FIG. 2, such as a controller / processor (280), a transmit processor (264), a TX MIMO processor (266), a MOD (254), an antenna (252), a DEMOD (254), a MIMO detector (256), a receive processor (258), etc.

[0039] As indicated above, FIG. 2 is provided as an example. Other examples may differ from those described in relation to FIG. 2.

[0040] FIG. 3 is a diagram illustrating an example (300) of wireless communication through one or more beams according to specific aspects of the present disclosure.

[0041] As illustrated in FIG. 3, a first device (305) (e.g., illustrated as a UE such as UE (120) in example (300)) can communicate with a second device (310) (e.g., illustrated as a BS such as BS (110) in example (300)) using one or more active beams (315). In some aspects, the first device (305) and the second device (310) can also communicate through one or more candidate beams (320). In some aspects, the active beam (315) can be selected from a set of candidate beams (320) by comparing the beam parameters (e.g., RSRP, RSRQ, RSSI, etc.) of the set of candidate beams (320). For example, the active beam (315) may be a beam having the best beam parameters among all beams in the set of candidate beams (320). In some aspects, the beams can operate in the millimeter-wave radio frequency band.

[0042] In some aspects, if the active beam (315) experiences a failure, the first device (305) may perform a beam failure recovery procedure. For example, when a failure of the active beam (315) is detected, the first device (305) may attempt to communicate with the second device (310) by transmitting a BFRQ transmission through one or more candidate beams (320).

[0043] The first device (305) can detect a fault based at least partially on monitoring one or more beam fault detection reference signals. For example, when the first device (305) determines that the measured RSRP of the beam fault detection reference signal satisfies a threshold, the first device (305) can determine that a beam fault has occurred.

[0044] As indicated above, FIG. 3 is provided as an example. Other examples may differ from those described in relation to FIG. 3.

[0045] FIG. 4 is a diagram illustrating an example (400) of a beam failure recovery procedure according to specific aspects of the present disclosure.

[0046] As illustrated in FIG. 4, the BS (110) and the UE (120) can communicate with each other using carrier aggregation. Using carrier aggregation, the BS (110) and the UE (120) can communicate with each other using a primary cell (PCell) and one or more secondary cells (SCell). In example (400), the secondary cells are DL-only secondary cells, which means that the secondary cells are configured for downlink communications only and not for uplink communications. However, in some aspects, the secondary cells may be configured for DL ​​and UL operations, UL-only operations, DL-only operations, combinations thereof, etc.

[0047] As illustrated by reference number (405), the UE (120) can detect a beam failure for a DL-only secondary cell. For example, the UE (120) can detect a beam failure by monitoring a beam failure detection reference signal for a DL-only secondary cell. As illustrated by reference number (410), the UE (120) and the BS (110) can perform a beam failure recovery (BFR) procedure (which may also be referred to as a link recovery procedure) using the primary cell. For example, the UE (120) can transmit a BFRQ-SR (BFRQ SR (scheduling request)) to the primary cell via the physical uplink control channel (PUCCH). The scheduling request can trigger a beam failure recovery (BFR). Based at least partially on receiving a scheduling request, BS (110) can transmit PDCCH (physical downlink shared channel) communication to schedule PUCCH communication for BFR on the primary cell.

[0048] The UE (120) may receive PDCCH communication and, on the primary cell, transmit scheduled PUCCH communication. The PUCCH communication may identify a secondary cell that has experienced a beam failure and / or indicate a candidate beam index for a candidate beam to replace the failed beam. For example, the PUCCH communication may include a MAC-CE (medium access control CE) (which may be referred to as a BFRQ MAC-CE) that identifies the failed secondary cell and the replacement beam. Based at least partially on receiving the PUCCH communication, the base station (110) may transmit PDCCH communication on the primary cell to instruct the UE (120) regarding a BFR procedure. For example, the PDCCH communication may instruct the UE (120) to perform a random access procedure for the secondary cell on one or more candidate beams. The UE (120) can perform BFR according to the PDCCH communication to obtain a new beam for communications on the secondary cell.

[0049] As indicated above, FIG. 4 is provided as an example. Other examples may differ from those described in relation to FIG. 4.

[0050] As described above, the UE can detect a beam failure and transmit one or more BFRQ transmissions (which may also be referred to as LRR (link recovery request) transmissions) to perform a beam failure recovery procedure (link recovery procedure). For example, the UE may transmit a BFRQ-SR through the primary cell to initiate the beam failure recovery procedure, and subsequently transmit a BFRQ MAC-CE through the primary cell to enable the completion of the beam failure recovery procedure. In this case, the UE transmits one or more BFRQ transmissions using dedicated resources on the primary cell.

[0051] However, when the secondary cell provides uplink resources for UE transmissions, the UE may not need to wait for dedicated resources on the primary cell to transmit a BFRQ. For example, the UE can identify uplink resources on the secondary cell and use them to transmit a BFRQ. In this way, the UE can reduce the delay associated with waiting for dedicated resources on the primary cell. However, other uplink transmissions may be scheduled on the secondary cell for the same uplink resources that the UE identifies to transmit a BFRQ. For example, the UE may be scheduled to transmit UCI (uplink control information), uplink data, etc., at a specific time resource that the UE identifies to transmit a BFRQ. This can lead to a conflict between the BFRQ transmission and other uplink transmissions, which may result in other uplink communications being inadvertently dropped.

[0052] Some aspects described herein enable selective multiplexing of other uplink transmissions and BFRQ transmissions on the uplink channel of a secondary cell. For example, a UE can detect a collision between a BFRQ transmission and another uplink transmission and can selectively multiplex a BFRQ transmission on the uplink channel based at least partially on a multiplexing rule. In this case, the UE can transmit at least one of an uplink transmission or a BFRQ transmission on the uplink channel based at least partially on a multiplexing rule. In this way, the UE enables BFRQ transmission on the secondary cell without causing inadvertent dropping of other uplink communications.

[0053] FIG. 5 is a diagram illustrating an example (500) of BFRQ multiplexing for secondary cells according to various aspects of the present disclosure. As illustrated in FIG. 5, the example (500) includes a BS (110) and a UE (120).

[0054] As illustrated in FIG. 5 and by reference number (510), the UE (120) can detect a beam failure for a secondary cell. For example, as described above, the UE (120) may determine that the measurement of the beam failure detection reference signal satisfies a measurement threshold. In some aspects, the UE (120) may decide to initiate a beam failure recovery procedure. For example, the UE (120) may decide to transmit a BFRQ-SR to initiate a beam failure recovery procedure.

[0055] As illustrated in FIG. 5, and by reference number (520), the UE (120) can detect a collision between a BFRQ transmission on an uplink channel and another uplink transmission. For example, the UE (120) can determine that resources on the uplink channel on which the UE (120) can transmit a BFRQ transmission are allocated for the transmission of another uplink transmission. In some aspects, the UE (120) can detect a collision for a specific BFRQ transmission type. For example, the UE (120) can detect a collision for a transmission of a BFRQ-SR, a subsequent BFRQ MAC-CE, etc. Similarly, the UE (120) can detect a collision with a specific type of uplink transmission. For example, the UE (120) can detect a collision with UCI (uplink control information) on a PUCCH type uplink channel, or uplink data transmission on a PUSCH (physical uplink shared channel) type uplink channel, etc.

[0056] In some aspects, the UE (120) may evaluate a multiplexing rule to determine whether to multiplex a BFRQ transmission over an uplink channel. For example, the UE (120) may decide to multiplex a BFRQ transmission over a specific type of channel corresponding to a specific type of BFRQ transmission. In this case, the UE (120) may decide to multiplex a BFRQ-SR over a PUCCH, a BFRQ MAC-CE having uplink data over a PUSCH to transmit uplink data transmission, etc. In addition to this example, when the PUCCH contains HARQ (hybrid automatic repeat request) ACK (acknowledgement) information bits associated with PUCCH format 2, format 3, or format 4, the UE (120) may multiplex a BFRQ transmission over an uplink channel.

[0057] In some aspects, the UE (120) may decide to multiplex a BFRQ transmission on an uplink channel based at least partially on identifying a match between the type of the BFRQ transmission and the type of another uplink transmission. For example, the UE (120) may determine that the BFRQ transmission is a BFRQ-SR and the UCI transmission is another SR transmission. In this case, the UE (120) may decide to multiplex the BFRQ-SR and the other SR. Additionally or alternatively, the UE (120) may determine the priorities of the BFRQ transmission and the other uplink transmission (e.g., based at least partially on the type of the other uplink transmission) and decide whether to multiplex the BFRQ transmission based at least partially on the priorities. For example, the UE (120) may decide to multiplex the BFRQ transmission with the other transmission when the BFRQ transmission is associated with a higher priority than the other transmission. In this case, the UE (120) may determine the priority of the BFRQ transmission based at least partially on the type of the BFRQ transmission. For example, the UE (120) can determine a first priority for BFRQ-SR and a second different priority for BFRQ MAC-CE.

[0058] In some aspects, the UE (120) may determine whether to multiplex the BFRQ transmission based at least partially on the characteristics of the first secondary cell to which a beam failure is detected and / or the second secondary cell to which the uplink channel is to be delivered. For example, when the BFRQ transmission is for a beam failure recovery procedure for the first secondary cell having a relatively high priority, and the second secondary cell to which the uplink channel is to be delivered is associated with a relatively low priority, the UE (120) may decide to multiplex the BFRQ transmission on the uplink channel. Additionally or alternatively, the UE (120) may decide to multiplex the BFRQ transmission on the uplink channel when the first secondary cell and the secondary cell are included in the same secondary cell group. Additionally or alternatively, the UE (120) may decide not to multiplex the BFRQ transmission on the uplink channel when the BFRQ transmission is scheduled for a subsequent transmission on the third secondary cell. In contrast, when a BFRQ transmission is scheduled for a subsequent transmission on a second secondary cell, the UE (120) can multiplex the BFRQ transmission on the uplink channel (of the second secondary cell) to enable reduced transmission delay.

[0059] In some aspects, the UE (120) may determine whether to multiplex BFRQ transmissions on the uplink channel based at least partially on the channel characteristics of the secondary cell. For example, when the UE (120) determines that the secondary cell is associated with a channel quality below a threshold (e.g., when the UE (120) detects a beam failure for the secondary cell), the UE (120) may decide not to multiplex BFRQs on the uplink channel of the secondary cell. Additionally or alternatively, the UE (120) may determine that the secondary cell is associated with a channel quality above a threshold and may decide to multiplex BFRQs on the uplink channel of the secondary cell.

[0060] In some aspects, the UE (120) may determine whether to multiplex BFRQ transmissions on the uplink channel based at least partially on beam mapping. For example, when multiplexing BFRQ-SRs on the uplink channel would cause beam failure for the corresponding BFRQ MAC-CE, the UE (120) may forgo multiplexing BFRQ scheduling requests on the uplink channel. In some aspects, the UE (120) may determine whether to multiplex BFRQ transmissions on the uplink channel based at least partially on timing criteria. For example, the UE (120) may select a first available resource (e.g., resources of a primary cell and / or one or more secondary cells) to multiplex the BFRQ transmission with another uplink transmission, thereby reducing the delay associated with transmitting the BFRQ transmission to the BS (110).

[0061] As illustrated in FIG. 5, and by reference number (530), the UE (120) may transmit at least one of a BFRQ transmission or another uplink transmission on the uplink transmission channel. For example, based at least partially on deciding to multiplex the BFRQ transmission on the uplink channel, the UE (120) may transmit both the BFRQ transmission and the other uplink transmission on the uplink channel. Additionally or alternatively, the UE (120) may transmit the BFRQ transmission on the uplink channel and drop the other uplink transmission. In contrast, based at least partially on deciding not to multiplex the BFRQ transmission on the uplink channel, the UE (120) may transmit the other uplink transmission on the uplink channel and delay the BFRQ transmission to a dedicated resource (e.g., on a secondary cell, a primary cell, etc.). In this way, the UE (120) may enable a beam failure recovery procedure for the secondary cell. For example, as illustrated by reference number (540), BS (110) can transmit a BFRR (beam failure recovery response) in response to BFRQ-SR, thereby initiating beam recovery as described above.

[0062] As indicated above, FIG. 5 is provided as an example. Other examples may differ from those described in relation to FIG. 5.

[0063] FIG. 6 is a diagram illustrating an exemplary process (600) performed, for example, by a UE, according to various aspects of the present disclosure. The exemplary process (600) is an example in which a UE (e.g., first device (305), UE (120), etc.) performs operations associated with beam failure recovery request multiplexing for secondary cells.

[0064] As illustrated in FIG. 6, in some aspects, the process (600) may include a step (block (610)) of detecting a collision between a beam failure recovery request (BFRQ) transmission and another uplink transmission to trigger beam failure recovery for a secondary cell on the uplink channel. For example, a UE (e.g., using a controller / processor (280), a transmit processor (264), a TX MIMO processor (266), a MOD (254), an antenna (252), etc.) may detect a collision between a beam failure recovery request (BFRQ) transmission and another uplink transmission to trigger beam failure recovery for a secondary cell on the uplink channel as described above.

[0065] As additionally illustrated in FIG. 6, in some aspects, the process (600) may include the step (block (620)) of transmitting at least one of a BFRQ transmission or another uplink transmission on an uplink channel based at least partially on a multiplexing rule. For example, a UE (e.g., using a controller / processor (280), a transmit processor (264), a TX MIMO processor (266), a MOD (254), an antenna (252), etc.) may transmit at least one of a BFRQ transmission or another uplink transmission on an uplink channel based at least partially on a multiplexing rule as described above.

[0066] The process (600) may include additional aspects related to one or more other processes described elsewhere in the present invention, such as any single aspect or any combination of aspects described below.

[0067] In the first aspect, the other uplink transmission is uplink control information or uplink data transmission.

[0068] In the second aspect, alone or in combination with the first aspect, the uplink channel is a physical uplink control channel or a physical uplink sharing channel.

[0069] In the third aspect, alone or in combination with one or more of the first and second aspects, the BFRQ transmission is a BFRQ scheduling request or a BFRQ MAC (media access control) CE (control element).

[0070] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the process (600) includes determining whether to multiplex a BFRQ transmission with another uplink transmission based at least partially on at least one of the type of another uplink transmission, the type of BFRQ transmission, a delay criterion, a data priority criterion, a cell priority criterion, characteristics of a secondary cell, or characteristics of a secondary cell group including a secondary cell.

[0071] In the fifth aspect, alone or in combination with one or more of the first to fourth aspects, the process (600) includes determining whether to multiplex a BFRQ transmission with another uplink transmission based at least partially on the characteristics of the uplink beam associated with the uplink channel.

[0072] In the sixth aspect, alone or in combination with one or more of the first to fifth aspects, the characteristics of the uplink beam are based at least partially on channel measurements.

[0073] In the seventh aspect, determining whether to multiplex a BFRQ transmission with another uplink transmission, either alone or in combination with one or more of the first to sixth aspects, includes determining to multiplex the BFRQ transmission with another uplink transmission based at least partially on the fact that a channel measurement satisfies a channel measurement threshold.

[0074] In the eighth aspect, alone or in combination with one or more aspects of the first to seventh aspects, the process (600) includes determining whether to multiplex a BFRQ transmission with another uplink transmission based at least partially on the mapping of a scheduling request for a scheduled beam or a scheduled cell.

[0075] In the ninth aspect, determining whether to multiplex a BFRQ transmission with another uplink transmission, either alone or in combination with one or more of the first to eighth aspects, includes determining not to multiplex the BFRQ transmission with another uplink transmission based at least partially on the fact that the mapping is for a faulty beam.

[0076] In the tenth aspect, alone or in combination with one or more aspects of the first through ninth aspects, the process (600) includes determining whether to multiplex a BFRQ transmission with another uplink transmission based at least partially on the timing of the uplink channel for one or more other available resources.

[0077] In the eleventh aspect, determining whether to multiplex a BFRQ transmission with another uplink transmission, either alone or in combination with one or more of the first to ten aspects, includes determining to multiplex the BFRQ transmission with another uplink transmission based at least in part on the fact that the other uplink transmission is associated with the earliest available resource.

[0078] In the eleventh aspect, alone or in combination with one or more of the first to ten aspects, the process (600) includes determining whether to multiplex a BFRQ transmission with another uplink transmission based at least partially on the type of UCI (uplink control information) to be multiplexed with the BFRQ.

[0079] FIG. 6 illustrates exemplary blocks of a process (600), but in some aspects, the process (600) may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those illustrated in FIG. 6. Additionally or alternatively, two or more blocks of the process (600) may be performed in parallel.

[0080] The foregoing disclosures are for illustrative purposes only and are not intended to limit the aspects to the exact form disclosed or to encompass all aspects. Modifications and variations may be made in light of the foregoing disclosures or may be captured from the practice of the aspects.

[0081] As used herein, the term “component” is intended to be interpreted broadly as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented as hardware, firmware, and / or a combination of hardware and software.

[0082] As used herein, satisfying a threshold may, depending on the context, represent a value such as exceeding the threshold, being greater than or equal to the threshold, being less than or equal to the threshold, being equal to the threshold, or not equal to the threshold.

[0083] It will be apparent that the systems and / or methods described herein may be implemented in different forms of hardware, firmware, and / or combinations of hardware and software. The actual specific control hardware or software code used to implement these systems and / or methods is not limited to these aspects. Accordingly, the operation and behavior of the systems and / or methods have been described herein without reference to specific software code. That is, it should be understood that software and hardware may be designed to implement the systems and / or methods based at least partially on the description herein.

[0084] Specific combinations of features are mentioned in the claims and / or disclosed in the specification, but these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features may be combined in ways that are not specifically mentioned in the claims and / or disclosed in the specification. Each dependent claim listed below may depend directly on only one claim, but the disclosure of various aspects includes each dependent claim in combination with every other claim in the set of claims. The phrase referring to "at least one of" a list of items refers to any combination of such items including single members. For example, "at least one of a, b, or c" is intended to cover a, b, c, ab, ac, bc, and abc, as well as any combination with sets of the same elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other order of a, b, and c).

[0085] Elements, acts, or commands used herein shall not be interpreted as important or essential unless explicitly stated otherwise. Additionally, as used herein, singular expressions are intended to include one or more items and may be used interchangeably with "one or more." Furthermore, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, etc.) and may be used interchangeably with "one or more." If only one item is intended, the phrase "only one" or similar language is used. Also, as used herein, terms such as "have," "have," and "having" are intended to be open-ended terms. Additionally, the phrase "based on" is intended to mean "based at least partially on" unless otherwise explicitly stated.

Claims

Claim 1 A wireless communication method performed by a UE (user equipment), comprising: a step of detecting a collision between a beam failure recovery request (BFRQ) transmission for triggering beam failure recovery for a secondary cell and another uplink transmission on an uplink channel of another secondary cell; a step of determining whether to multiplex the BFRQ transmission with the other uplink transmission based at least partially on the characteristics of an uplink beam associated with the uplink channel; and a step of transmitting at least one of the BFRQ transmission or the other uplink transmission on the uplink channel based at least partially on a multiplexing rule. Claim 2 A wireless communication method performed by a UE, wherein, in claim 1, the other uplink transmission is uplink control information or uplink data transmission. Claim 3 A wireless communication method performed by a UE, wherein, in claim 1, the uplink channel is a physical uplink control channel or a physical uplink sharing channel. Claim 4 A wireless communication method according to claim 1, wherein the BFRQ transmission is performed by a UE which is a BFRQ scheduling request or a BFRQ MAC (media access control) CE (control element). Claim 5 A wireless communication method performed by a UE according to claim 1, further comprising the step of determining whether to multiplex the BFRQ transmission with the other uplink transmission based at least partially on the type of UCI (uplink control information) to be multiplexed with the BFRQ. Claim 6 A wireless communication method performed by a UE, further comprising the step of determining whether to multiplex the BFRQ transmission with the other uplink transmission based at least partially on at least one of the type of the other uplink transmission, the type of the BFRQ transmission, a delay criterion, a data priority criterion, a cell priority criterion, the characteristics of the secondary cell, or the characteristics of a secondary cell group including the secondary cell. Claim 7 delete Claim 8 A wireless communication method performed by a UE, wherein, in claim 1, the characteristics of the uplink beam are based at least partially on channel measurements. Claim 9 A wireless communication method performed by a UE, wherein, in claim 8, the step of determining whether to multiplex the BFRQ transmission with the other uplink transmission comprises the step of determining to multiplex the BFRQ transmission with the other uplink transmission based at least partially on the fact that the channel measurement satisfies a channel measurement threshold. Claim 10 A wireless communication method performed by a UE according to claim 1, further comprising the step of determining whether to multiplex the BFRQ transmission with the other uplink transmission based at least partially on the mapping of a scheduling request for a scheduled beam or a scheduled cell. Claim 11 A wireless communication method performed by a UE, wherein the step of determining whether to multiplex the BFRQ transmission with the other uplink transmission comprises the step of determining not to multiplex the BFRQ transmission with the other uplink transmission based at least partially on the fact that the mapping is for a failed beam. Claim 12 A wireless communication method performed by a UE according to claim 1, further comprising the step of determining whether to multiplex the BFRQ transmission with the other uplink transmission based at least partially on the timing of the uplink channel for one or more other available resources. Claim 13 A wireless communication method performed by a UE according to claim 12, wherein the step of determining whether to multiplex the BFRQ transmission with the other uplink transmission comprises the step of determining to multiplex the BFRQ transmission with the other uplink transmission based at least partially on the fact that the other uplink transmission is associated with the earliest available resource. Claim 14 A UE (user equipment) for wireless communication comprising: a memory; and one or more processors operably coupled to the memory, wherein the memory and the one or more processors detect a collision between a beam failure recovery request (BFRQ) transmission for triggering beam failure recovery for a secondary cell and another uplink transmission on an uplink channel of another secondary cell; determine whether to multiplex the BFRQ transmission with the other uplink transmission based at least partially on the characteristics of an uplink beam associated with the uplink channel; and are configured to transmit at least one of the BFRQ transmission or the other uplink transmission on the uplink channel based at least partially on a multiplexing rule. Claim 15 In claim 14, the other uplink transmission is an uplink control information or uplink data transmission, a UE for wireless communication. Claim 16 In claim 14, the uplink channel is a physical uplink control channel or a physical uplink sharing channel, a UE for wireless communication. Claim 17 In claim 14, the BFRQ transmission is a UE for wireless communication that is a BFRQ scheduling request or a BFRQ MAC (media access control) CE (control element). Claim 18 A UE for wireless communication, wherein, in claim 14, the one or more processors are further configured to determine whether to multiplex the BFRQ transmission with the other uplink transmission, at least partially based on the type of UCI (uplink control information) to be multiplexed with the BFRQ. Claim 19 A UE for wireless communication, wherein, in claim 14, the one or more processors are further configured to determine whether to multiplex the BFRQ transmission with the other uplink transmission based at least partially on at least one of the type of the other uplink transmission, the type of the BFRQ transmission, a delay criterion, a data priority criterion, a cell priority criterion, the characteristics of the secondary cell, or the characteristics of a secondary cell group including the secondary cell. Claim 20 delete Claim 21 In claim 14, the characteristics of the uplink beam are based at least partially on channel measurements, for a UE for wireless communication. Claim 22 A UE for wireless communication according to claim 21, wherein the one or more processors are configured to determine whether to multiplex the BFRQ transmission with the other uplink transmission, at least partially based on the fact that the channel measurement satisfies a channel measurement threshold when determining whether to multiplex the BFRQ transmission with the other uplink transmission. Claim 23 A UE for wireless communication according to claim 14, wherein the one or more processors are further configured to determine whether to multiplex the BFRQ transmission with the other uplink transmission, at least partially based on the mapping of a scheduling request for a scheduled beam or a scheduled cell. Claim 24 A UE for wireless communication, wherein, in claim 23, the one or more processors are configured to decide not to multiplex the BFRQ transmission with the other uplink transmission when determining whether to multiplex the BFRQ transmission with the other uplink transmission, at least partially based on the fact that the mapping is for a faulty beam. Claim 25 A UE for wireless communication according to claim 14, wherein the one or more processors are further configured to determine whether to multiplex the BFRQ transmission with the other uplink transmission, at least partially based on the timing of the uplink channel with one or more other available resources. Claim 26 A UE for wireless communication, wherein, in claim 25, the one or more processors are configured to determine whether to multiplex the BFRQ transmission with the other uplink transmission, at least in part, based on the fact that the other uplink transmission is associated with the earliest available resource. Claim 27 A non-transient computer-readable storage medium for storing a set of commands for wireless communication, wherein the set of commands, when executed by one or more processors of a UE (user equipment), causes the UE to detect a collision between a beam failure recovery request (BFRQ) transmission for triggering beam failure recovery for a secondary cell and another uplink transmission on an uplink channel of another secondary cell; determine whether to multiplex the BFRQ transmission with the other uplink transmission based at least partially on the characteristics of the uplink beam associated with the uplink channel; and transmit at least one of the BFRQ transmission or the other uplink transmission on the uplink channel based at least partially on a multiplexing rule. Claim 28 In claim 27, the other uplink transmission is an uplink control information or uplink data transmission, a non-transient computer-readable storage medium. Claim 29 A device for wireless communication, comprising: means for detecting a collision between a beam failure recovery request (BFRQ) transmission for triggering beam failure recovery for a secondary cell and another uplink transmission on an uplink channel of another secondary cell; means for determining whether to multiplex the BFRQ transmission with the other uplink transmission based at least partially on the characteristics of an uplink beam associated with the uplink channel; and means for transmitting at least one of the BFRQ transmission or the other uplink transmission on the uplink channel based at least partially on a multiplexing rule. Claim 30 In claim 29, the other uplink transmission is an uplink control information or uplink data transmission, a device for wireless communication.

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