Joint beam failure detection

Abstract

Methods, apparatus, and computer program products for wireless communications are provided. A component carrier group can be configured for beam management such that beam management for a first component carrier is applied to one or more second component carriers to reduce signaling overhead associated with controlling the defined component carrier group. A user equipment can be configured to identify the component carrier group and, upon receiving a beam failure detection reference signal from a base station on the first component carrier, identify a beam failure condition for the first component carrier and one or more second component carriers in the component carrier group.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 62 / 929,658, filed on November 1, 2019, and entitled “JOINT BEAM FAILURE DETECTION,” and U.S. Non-Provisional Patent Application No. 16 / 949,410, filed on October 28, 2020, and entitled “JOINT BEAM FAILURE DETECTION,” both of which are hereby expressly incorporated herein by reference. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communications and to techniques and apparatus for joint beam failure detection. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access systems include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, 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) systems. LTE / LTE-Advanced is a Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless communication network may include multiple base stations (BSs) that can support communications for multiple user equipment (UEs). UEs can communicate with a BS via downlinks and uplinks. A downlink (or forward link) refers to the communication link from the BS to the UE, and an uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), 5G BS, 5G Node B, etc.

[0006] The above-mentioned multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different wireless devices to communicate at the city, national, regional, and even global levels. 5G (also known as New Radio (NR)) is a set of enhancements to the LTE mobile standard released by the Third Generation Partnership Project (3GPP). 5G is designed to better integrate with other open standards by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and using OFDM with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL) and CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation to better support mobile broadband internet access. However, as the demand for mobile broadband access continues to grow, there is a need for further improvements to LTE and 5G technologies. Preferably, these improvements should be applicable to other multiple access technologies and the telecommunications standards that adopt them. Summary of the Invention

[0007] In some communication systems such as 5G, the bandwidth can be divided into multiple bandwidth parts and / or multiple component carriers. Each bandwidth part and / or component carrier can use parameters that can be specific to the broadband part and / or component carrier to implement uplink and / or downlink communication between the UE and the BS. For example, the UE can communicate with the BS on a first broadband part according to a first communication configuration, and can communicate with the BS on a second broadband part according to a second communication configuration. This can achieve flexibility in UE deployment, power saving configuration, etc. relative to a single communication configuration for the entire broadband.

[0008] The BS may send a medium access control (MAC) control element (CE) to activate a transmit configuration indicator (TCI) state set (e.g., associated with a TCI state identifier set) for a physical downlink shared channel (PDSCH). The UE may apply the TCI state set to a set of bandwidth portions and / or component carriers within a common frequency band and / or sharing a common analog beamformer. The UE may receive signaling from the BS indicating to which component carrier of a plurality of candidate component carriers within the bandwidth the UE is to apply the TCI state set. For example, the BS may provide RRC signaling indicating a set of component carriers and / or a set of bandwidth portions corresponding to the set of component carriers, and the UE may group the component carrier sets based on the RRC signaling. In this manner, when the UE receives signaling (e.g., a MAC CE) for activating the TCI state set, the UE may apply subsequent signaling to the component carrier group instead of to all component carriers in the plurality of candidate component carriers. In some cases, the UE may be configured with multiple component carrier groups. In this case, when the UE receives signaling to activate the TCI state set for a specific component carrier, the UE may apply the signaling to each component carrier within the component carrier group including the specific component carrier.

[0009] The UE may monitor a beam failure detection reference signal that may be received in any of a plurality of component carriers in a component carrier group. For example, the BS may schedule resources for the beam failure detection reference signal in each component carrier and may periodically transmit the beam failure detection reference signal in each component carrier. However, component carriers in a component carrier group that share a common analog beamformer may have correlated beam failures. That is, a beam failure in a first component carrier in a component carrier group may be correlated with a beam failure in a second component in the same component carrier group. In such a case, monitoring the beam failure detection reference signal in each component carrier may use excessive network resources and / or result in increased UE complexity to implement such monitoring.

[0010] Some aspects described herein enable joint beam failure detection. For example, the UE may receive signaling from a BS that configures a component carrier group. In this case, when the UE detects a beam failure condition for a first component carrier in the component carrier group (e.g., based at least in part on receiving a beam failure detection reference signal), the UE may determine that a beam failure condition has occurred for other component carriers in the component carrier group. In this way, the UE does not need to detect a beam failure detection reference signal in each component carrier in the component carrier group. In addition, the BS may abandon sending a beam failure detection reference signal in each component carrier in the component carrier group based at least in part on the UE associating a beam failure condition in a first component carrier in the component carrier group with a beam failure condition in one or more second component carriers in the component carrier group. In this way, the UE and the BS may achieve reduced usage of network resources, reduced power consumption, reduced UE complexity, and the like.

[0011] In aspects of the present disclosure, methods, user equipment (UE), base station (BS), apparatus, and computer program products are provided.

[0012] In some aspects, a method of wireless communication performed by a UE may include: detecting a beam failure detection reference signal for a first component carrier in a component carrier group, wherein at least one second component carrier shares a quasi-co-location parameter with the first component carrier; and initiating a beam failure recovery process for the first component carrier and the at least one second component carrier based at least in part on measuring the beam failure detection reference signal and identifying the at least one second component carrier reference signal associated with the beam failure detection reference signal.

[0013] In some aspects, a method of wireless communication performed by a BS may include: sending a beam failure detection reference signal to a UE on a first component carrier in a component carrier group that shares quasi-co-location parameters; and communicating with the UE to initiate a beam failure recovery process for the first component carrier and at least one second component carrier in the component carrier group based at least in part on sending the beam failure detection reference signal on the first component carrier.

[0014] In some aspects, a 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 beam failure detection reference signal for a first component carrier in a component carrier group, wherein at least one second component carrier in the component carrier group shares quasi-co-location parameters with the first component carrier; and initiate a beam failure recovery procedure for the first component carrier and the at least one second component carrier based at least in part on measuring the beam failure detection reference signal and identifying the at least one second component carrier associated with the beam failure detection reference signal.

[0015] In some aspects, a base station 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: transmit a beam failure detection reference signal to a UE on a first component carrier in a group of component carriers that share quasi-co-location parameters; and communicate with the UE to initiate a beam failure recovery procedure for the first component carrier and at least one second component carrier in the group of component carriers based at least in part on transmitting the beam failure detection reference signal on the first component carrier.

[0016] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a UE, the one or more instructions may cause the one or more processors to: detect a beam failure detection reference signal for a first component carrier in a component carrier group, wherein at least one second component carrier in the component carrier group shares quasi-co-location parameters with the first component carrier; and initiate a beam failure recovery procedure for the first component carrier and the at least one second component carrier based at least in part on measuring the beam failure detection reference signal and identifying the at least one second component carrier associated with the beam failure detection reference signal.

[0017] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a base station, the one or more instructions may cause the one or more processors to: transmit a beam failure detection reference signal to a UE on a first component carrier in a group of component carriers that share quasi-co-location parameters; and communicate with the UE to initiate a beam failure recovery procedure for the first component carrier and at least one second component carrier in the group of component carriers based at least in part on transmitting the beam failure detection reference signal on the first component carrier.

[0018] In some aspects, an apparatus for wireless communication may include components for detecting a beam failure detection reference signal for a first component carrier in a component carrier group, wherein at least one second component carrier in the component carrier group and the first component carrier share quasi-co-location parameters; and components for initiating a beam failure recovery procedure for the first component carrier and the at least one second component carrier based at least in part on measuring the beam failure detection reference signal and identifying at least one second component carrier associated with the beam failure detection reference signal.

[0019] In some aspects, an apparatus for wireless communication may include components for sending a beam failure detection reference signal to a UE on a first component carrier in a component carrier group that shares quasi-co-location parameters; and components for communicating with the UE to initiate a beam failure recovery procedure for the first component carrier and at least one second component carrier in the component carrier group based at least in part on sending the beam failure detection reference signal on the first component carrier.

[0020] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems generally described with reference to and as illustrated in the drawings and description.

[0021] The foregoing has generally outlined 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 used as a basis for modifying or designing other structures to achieve the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The features of the concepts disclosed herein, their organization and methods of operation, and related advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each figure is provided for the purpose of illustration and description and not as a definition of limitations to the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a diagram illustrating an example of a wireless communication network.

[0023] Figure 2 is a diagram illustrating an example of a base station communicating with a UE in a wireless communication network.

[0024] Figure 3 is a diagram illustrating an example of joint beam failure detection.

[0025] Figure 4 is a flow chart of a method of wireless communication.

[0026] Figure 5is a conceptual data flow diagram illustrating the flow of data between different modules / parts / components in an example apparatus.

[0027] Figure 6 is a diagram illustrating an example of a hardware implementation of an apparatus employing a processing system.

[0028] Figure 7 is a flow chart of a method of wireless communication.

[0029] Figure 8 is a conceptual data flow diagram illustrating the flow of data between different modules / parts / components in an example apparatus.

[0030] Figure 9 is a diagram illustrating an example of a hardware implementation of an apparatus employing a processing system. DETAILED DESCRIPTION

[0031] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent configurations in which the concepts described herein may be practiced. The detailed description includes specific details to provide a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some cases, well-known structures and components are shown in block diagram form to avoid obscuring such concepts.

[0032] Several aspects of telecommunication systems will now be presented with reference to various apparatuses and methods. These apparatuses and methods will be described in the following detailed description by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements") and illustrated in the accompanying drawings. These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0033] For example, an element or any part of an element or any combination of elements can be implemented using a "processing system" including one or more processors. Examples of processors include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functions described throughout this disclosure. One or more processors in a processing system can execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language or other, software should be broadly interpreted to mean instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, processes, functions, etc.

[0034] Therefore, in one or more example embodiments, the functions described can be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, these functions can be stored on a computer-readable medium as one or more instructions or codes or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. The storage medium can be any available medium that a computer can access. By way of example and not limitation, such computer-readable media can include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), compact disc ROM (CD-ROM) or other optical disc storage, magnetic disk storage or other magnetic storage device, a combination of the above-mentioned types of computer-readable media, or any other medium that a computer can access that can be used to store computer executable code in the form of instructions or data structures.

[0035] It should be noted that although various aspects may be described herein using terminology generally associated with 3G and / or 4G wireless technologies, various aspects of the present disclosure may be applicable to other generation-based communication systems, such as 5G and higher, including 5G technology.

[0036] Figure 1 is a diagram illustrating a wireless network 100 in which various aspects of the present disclosure may be practiced. The wireless network 100 may be an LTE network or some other wireless network, such as a 5G network. The wireless network 100 may include multiple BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE) and may also be referred to as a base station, 5G BS, Node B, gNB, 5G NB, access point, transmit receive point (TRP), 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 that coverage area, depending on the context in which the term is used.

[0037] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in 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 Figure 1 In the example shown, BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. A BS may support one or more (e.g., three) cells. The terms "eNB," "base station," "5G BS," "gNB," "TRP," "AP," "Node B," "5G NB," and "cell" may be used interchangeably herein.

[0038] In some examples, the cells may not necessarily be stationary, and the geographic area of the cells may move depending on the location of the mobile BS. In some examples, the BSs may be interconnected with each other and / or connected to one or more other BSs or network nodes (not shown) in wireless network 100 via various types of backhaul interfaces, such as direct physical connections, virtual networks, and / or using any suitable transport network.

[0039] The wireless network 100 may also include a relay station. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a BS or a UE) and transmit the data transmissions to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown, a relay station 110d may communicate with a macro BS 110a and a UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0040] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0041] The network controller 130 may be coupled to a set of BSs and may provide coordination and control for these BSs. The network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with each other directly or indirectly, for example, via a wireless or wired backhaul.

[0042] UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile. A UE may also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. A UE may be a cellular phone (e.g., a smartphone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biosensor / device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring, a smart bracelet)), an entertainment device (e.g., a music or video device or a satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0043] Some UEs may be considered machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc. that can communicate with a base station, another device (e.g., a remote device), or some other entity. For example, a wireless node may provide connectivity to or to 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 Internet of Things (IoT) devices and / or may be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs may be considered customer premises equipment (CPE). UE 120 may be included in a housing that houses components of UE 120 (such as a processor component, a memory component, etc.).

[0044] In general, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific RAT and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, 5G RAT networks can be deployed. Some RATs can be divided into component carriers and / or associated bandwidth portions (such as in carrier aggregation deployments). In this case, the BS can group a set of component carriers into a component carrier group and can send a beam failure recovery reference signal on a single component carrier in the component carrier group to enable the UE to detect beam failure of any one of the component carriers in the component carrier group.

[0045] In some examples, access to the air interface can be scheduled, where a scheduling entity (e.g., a base station) allocates resources for communication between some or all devices and equipment within a service area or cell of the scheduling entity. In the present disclosure, as discussed further below, a scheduling entity can be responsible for scheduling, allocating, reconfiguring, and releasing resources for one or more dependent entities. That is, for scheduled communications, the dependent entities utilize resources allocated by the scheduling entity.

[0046] A base station is not the only entity that can act as a scheduling entity. That is, in some examples, a UE can act as a scheduling entity, scheduling resources for one or more subordinate entities (e.g., one or more other UEs). In this example, the UE acts as a scheduling entity, and other UEs communicate wirelessly using the resources scheduled by the UE. A UE can act as a scheduling entity in a peer-to-peer (P2P) network and / or a mesh network. In the mesh network example, in addition to communicating with the scheduling entity, UEs can also optionally communicate directly with each other.

[0047] Thus, in a wireless communication network having scheduled access to time-frequency resources and having cellular, P2P, and mesh configurations, a scheduling entity and one or more slave entities may communicate using the scheduled resources.

[0048] As indicated above, the Figure 1 This is just an example. Other examples can be found in the Figure 1 Different than described.

[0049] Figure 2 Shows that it can be Figure 1Block diagram 200 shows a design of base station 110 and UE 120 for one of the base stations and one of the UEs in FIG. Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where in general T≧1 and R≧1.

[0050] At the base station 110, a transmit processor 220 may receive data for one or more UEs from a data source 212, may select a modulation and coding scheme (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, may process (e.g., encode and modulate) data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and control information (e.g., CQI requests, grants, upper layer signaling, etc.) and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., CRS, such as a beam failure detection reference signal on the first component carrier in a component carrier group) and synchronization signals (e.g., a primary synchronization signal (PSS) and a secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process its own output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively. According to various aspects described in greater detail below, position coding may be utilized to generate synchronization signals to convey additional information.

[0051] At UE 120, antennas 252a through 252r can receive downlink signals from base station 110 and / or other base stations and can provide received signals to demodulators (DEMODs) 254a through 254r, respectively. Each demodulator 254 can condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 can further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 can obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. A receive (RX) processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information (e.g., beam failure detection reference signal) and system information to a controller / processor 280. A channel processor can determine RSRP, RSSI, RSRQ, CQI, etc. The controller / processor 280 may determine that a beam failure detection reference signal received on a first component carrier applies to one or more second component carriers in a common component carrier group.

[0052] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded and decoded by a TX MIMO processor 266 (if applicable), further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, uplink signals from the UE 120 and other UEs may be received by the antennas 234, processed by the demodulators 232, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the UE 120. The receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0053] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2Any other component(s) of the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or the like may perform one or more techniques associated with joint beam failure detection, as described in more detail elsewhere herein. Figure 2 Any other component(s) of may perform or direct e.g. Figure 4 The operations of method 400 are, Figure 7 The operations of method 700 of , and / or other processes described herein. Memories 242 and 282 may store data and program codes for BS 110 and UE 120, respectively. Scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink.

[0054] As indicated above, the Figure 2 This is just an example. Other examples can be found in the Figure 2 Different than described.

[0055] 5G may refer to a radio configured to operate according to a new air interface (e.g., other than one based on Orthogonal Frequency Division Multiple Access (OFDMA)) or a fixed transport layer (e.g., other than Internet Protocol (IP)). In various aspects, 5G may utilize OFDM with CP (referred to herein as cyclic prefix OFDM or CP-OFDM) and / or SC-FDM on the uplink, may utilize CP-OFDM on the downlink, and may include support for half-duplex operation using TDD. In various aspects, 5G may utilize OFDM with CP (referred to herein as CP-OFDM) and / or Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM), for example, on the uplink, may utilize CP-OFDM on the downlink, and may include support for half-duplex operation using TDD. 5G may include enhanced mobile broadband (eMBB) services for wide bandwidth (e.g., 80 megahertz (MHz) and higher), millimeter wave (mmW) for high carrier frequencies (e.g., 60 gigahertz (GHz)), massive MTC (mMTC) for non-backward compatible MTC technologies, and / or mission critical ultra-reliable low latency communication (URLLC) services.

[0056] A single component carrier bandwidth of 100 MHz can be supported. A 5G resource block can span 12 subcarriers with a subcarrier bandwidth of 75 kilohertz (kHz) and a duration of 0.1 millisecond. Each radio frame can include 50 subframes of length 10 ms. Therefore, each subframe can have a length of 0.2 ms. Each subframe can indicate the link direction (e.g., DL or UL) used for data transmission, and the link direction of each subframe can be switched dynamically. Each subframe can include DL / UL data and DL / UL control data.

[0057] Beamforming can be supported and the beam direction can be dynamically configured. MIMO transmission with precoding can also be supported. MIMO configurations in the DL can support up to 8 transmit antennas, with multi-layer DL transmission of up to 8 streams and up to 2 streams per UE. Multiple cell aggregation of up to 8 serving cells can be supported. Alternatively, in addition to the OFDM interface, 5G can support different air interfaces. 5G networks can include entities such as central units or distributed units.

[0058] The RAN may include a central unit (CU) and a distributed unit (DU). A 5G BS (e.g., gNB, 5G Node B, Node B, transmit receive point (TRP), access point (AP)) may correspond to one or more BSs. A 5G cell may be configured as an access cell (ACell) or a data-only cell (DCell). For example, the RAN (e.g., a central unit or a distributed unit) may configure a cell. A DCell may be a cell used for carrier aggregation or dual connectivity, but not for initial access, cell selection / reselection, or handover. In some aspects, a DCell may not send a synchronization signal. In some aspects, a DCell may send a synchronization signal. The 5G BS may send a downlink signal indicating the cell type to the UE. Based at least in part on the cell type indication, the UE may communicate with the 5G BS. For example, the UE may determine, based at least in part on the indicated cell type, a 5G BS to be considered for cell selection, access, handover, and / or measurement.

[0059] Figure 3 is a diagram illustrating an example 300 of joint beam failure detection. Figure 3 As shown in , example 300 includes a UE 305 and a BS 310 communicating using a first component carrier, a second component carrier, etc. in a component carrier group.

[0060] At 315, the BS 310 may send, and the UE 315 may receive, signaling to configure a beam failure detection reference signal. For example, the BS 310 may configure the beam failure detection reference signal on a particular component carrier to enable beam failure detection across multiple component carriers. In some aspects, the BS 310 may select a single component carrier on which to configure the beam failure detection reference signal. For example, the BS 310 may configure, on a first component carrier, a beam failure detection reference signal corresponding to each unique quasi-co-located (QCL) type D source for a plurality of component carriers in a component carrier group. In this case, the UE 315 may monitor only the first component carrier to detect the beam failure detection reference signal based at least in part on the received signaling.

[0061] In some aspects, BS 310 may use a beam failure detection reference signal on a first component carrier to indicate a component carrier group for which beam failure detection is to be performed. For example, BS 310 may send radio resource control (RRC) signaling, medium access control (MAC) control element (CE) signaling, downlink control information (DCI) signaling, etc. to identify a component carrier from a plurality of candidate component carriers in a bandwidth to be allocated to the component carrier group. In this case, the component carrier group may be the same component carrier group used for the component carrier group-based beam update procedure. In this way, BS 310 avoids using separate signaling for component carrier grouping for beam failure detection and beam update, thereby reducing overall signaling.

[0062] In some aspects, the BS 310 may send signaling to configure a beam failure detection reference signal for the identified component carrier group. For example, the BS 310 may send RRC signaling, MAC CE signaling, DCI signaling, etc. on a first component carrier to configure resources for transmitting subsequent beam failure detection reference signals. Additionally or alternatively, the UE 315 may determine the configuration of the beam failure detection reference signal without explicit configuration signaling. For example, the UE 315 may determine that the control resource set (CORESET) transmission configuration indicator (TCI) state includes a single reference signal. In this case, the UE 315 may determine that each unique reference signal in each CORESET TCI state of the component carrier group is a beam failure detection reference signal. Additionally or alternatively, the UE 315 may determine that the CORESET TCI state includes multiple reference signals (e.g., two reference signals). In this case, the UE 315 may determine that each unique QCL type D reference signal in each CORESET TCI state of the component carrier group is a beam failure detection reference signal.

[0063] In some aspects, the BS 310 and / or the UE 315 may select a particular beam failure detection reference signal to use from a plurality of candidate beam failure detection reference signals for which resources have been allocated based at least in part on a rule. For example, the BS 310 may select the beam failure detection reference signal with the lowest reference signal identifier value as the beam failure detection reference signal to be transmitted by the BS 310. Additionally or alternatively, the BS 310 may select a particular number of beam failure detection reference signals to satisfy a limit on the maximum number of beam failure detection reference signals. For example, the BS 310 may select a set of a particular number of beam failure detection reference signals with the lowest reference signal identifier values. In some aspects, the BS 310 may send signaling to the UE 315 instructing the UE 315 to monitor only a subset of the component carriers in the component carrier group to receive the selected beam failure detection reference signal.

[0064] At 320, BS 310 may transmit and UE 315 may receive a beam failure detection reference signal. For example, UE 315 may receive the beam failure detection reference signal on the first component carrier in the component carrier group that shares the quasi co-location parameter. In this case, UE 315 may perform measurements on the beam failure detection reference signal to determine whether beam failure has occurred. For example, UE 315 may determine whether a block error rate (BLER) is less than a BLER threshold, whether a reference signal received power (RSRP) is less than an RSRP threshold, whether a reference signal received quality (RSRQ) is less than an RSRQ threshold, etc.

[0065] At 325, UE 315 may detect beam failure based at least in part on a beam failure detection reference signal. For example, based at least in part on receiving a beam failure detection reference signal on a first component carrier in a component carrier group that shares quasi co-location parameters (e.g., and based at least in part on measuring the beam failure detection reference signal), UE 120 may detect beam failure on the first component carrier. Additionally or alternatively, based at least in part on receiving a beam failure detection reference signal on a first component carrier in a component carrier group that shares quasi co-location parameters (e.g., quasi co-location type D), UE 120 may detect beam failure on a second component carrier and / or one or more other component carriers in the component carrier group that includes the first component carrier. In this case, UE 315 and BS 310 may communicate to initiate a beam failure recovery procedure on the first component carrier, the second component carrier, and so on. In this manner, BS 310 and UE 315 may be able to implement joint beam failure detection.

[0066] As indicated above, the Figure 3 As an example. Other examples can be related to Figure 3 Different than described.

[0067] Figure 4 4 is a flow chart of a method 400 for wireless communication. The method may be performed by a UE (eg, UE 120, UE 305, apparatus 502 / 502', UE 850, etc.).

[0068] At 410, the UE may detect a beam failure detection reference signal on a first component carrier. For example, the UE (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, etc.) may detect a beam failure detection reference signal for a first component carrier in a component carrier group, as described in more detail above. In a first aspect, the beam failure detection reference signal is a quasi-co-located Type D reference signal configured on a single component carrier in the component carrier group, corresponding to each unique quasi-co-located Type D source (of the plurality of component carriers). In a second aspect, alone or in combination with the first aspect, the UE may monitor resources of the component carrier group and detect the beam failure detection reference signal for the first component carrier based at least in part on monitoring the resources of the component carrier group.

[0069] In a third aspect, alone or in combination with one or more of the first and second aspects, the UE may receive base station signaling that configures a monitoring beam failure detection reference signal, and may receive the beam failure detection reference signal based at least in part on the base station signaling that configures the monitoring beam failure detection reference signal. In a fourth aspect, alone or in combination with one or more of the first to third aspects, the base station signaling is radio resource control signaling, medium access control (MAC) control element signaling, downlink control information signaling, or beam update signaling. In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the UE may determine the beam failure detection reference signal based at least in part on a control resource set (CORESET) transmission control indicator (TCI) status of a component carrier group (which corresponds to monitoring the configuration of the beam failure detection reference signal based at least in part on the CORESET TCI status of the component carrier group), and receive the beam failure detection reference signal based at least in part on the configuration of the monitoring beam failure detection reference signal. In a sixth aspect, alone or in combination with one or more of aspects one to five, the UE may receive base station signaling indicating that the UE is to monitor a beam failure detection reference signal on a subset of a component carrier group (wherein the subset of the component carrier group includes the first component carrier), perform monitoring based at least in part on the base station signaling to receive the beam failure detection reference signal on the subset of the component carrier group, and receive the beam failure detection reference signal based at least in part on the monitoring to receive the beam failure detection reference signal on the subset of the component carrier group.

[0070] At 420, in some aspects, the UE may determine a second component carrier associated with the beam failure detection reference signal. For example, the UE (e.g., using the controller / processor 280, etc.) may determine at least one second component carrier in the component carrier group associated with the beam failure detection reference signal. In some aspects, the at least one second component carrier shares quasi-co-location parameters with the first component carrier, as described in more detail above. In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the UE may receive base station signaling identifying a component carrier group, and may determine the at least one second component carrier based at least in part on the base station signaling identifying the component carrier group.

[0071] In an eighth aspect, alone or in combination with one or more of aspects 1 to 7, the base station signaling is radio resource control signaling, medium access control (MAC) control element signaling, downlink control information signaling, or beam update signaling. In a ninth aspect, alone or in combination with one or more of aspects 1 to 8, a TCI state in a control resource set (CORESET) is configured for only one reference signal, and each unique reference signal in each CORESET TCI state is a beam failure detection reference signal. In a tenth aspect, alone or in combination with one or more of aspects 1 to 9, a TCI state in a CORESET is configured for multiple reference signals, and each unique quasi-co-located type D reference signal in each CORESET TCI state is a beam failure detection reference signal. In an eleventh aspect, alone or in combination with one or more of aspects 1 to 10, the beam failure detection reference signal is selected from a plurality of candidate beam failure detection reference signals based at least in part on a rule.

[0072] At 430, the UE may initiate a beam failure recovery procedure for the first component carrier and the second component carrier. For example, the UE (e.g., using the controller / processor 280, the transmit processor 264, the TX MIMO processor 266, the MOD 254, the antenna 252) may initiate a beam failure recovery procedure for the first component carrier and the at least one second component carrier based at least in part on measuring a beam failure detection reference signal and identifying at least one second component carrier associated with the beam failure detection reference signal, as described in more detail above. In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the UE may determine that the measurement of the beam failure detection reference signal satisfies a threshold indicating a beam failure for the first component carrier, and initiate a beam failure recovery procedure based at least in part on determining that the measurement of the beam failure detection reference signal satisfies the threshold.

[0073] Method 400 may include additional aspects, such as any single aspect or any combination of aspects described above and / or in connection with one or more other processes described elsewhere herein.

[0074] although Figure 4 Example blocks of a method of wireless communication are shown, but in some aspects the method may include Figure 4 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those shown in . Additionally or alternatively, Figure 4 Two or more blocks shown in may be executed in parallel.

[0075] Figure 5 is a conceptual data flow illustrating the flow of data between different modules / components / assemblies in the example apparatus 502 Figure 5 The apparatus 502 may be a UE. In some aspects, the apparatus 502 includes a receiving module 504, a detecting module 506, a determining module 508, an initiating module 510, a monitoring module 512, and / or a sending module 514.

[0076] The receiving module 504 may receive information associated with detecting a beam failure detection reference signal as data 520. For example, the receiving module 504 may receive the beam failure detection reference signal, signaling indicating a configuration for receiving the beam failure detection reference signal, etc. from the BS 550. In some aspects, the receiving module 504 may receive the beam failure detection reference signal based at least in part on data 522 from a monitoring module 512 associated with controlling the receiving module 504. For example, the monitoring module 512 may cause the receiving module 504 to monitor resources of a component carrier group.

[0077] The detection module 506 may receive information associated with detecting a beam failure reference signal as data 524 from the reception module 504 and / or may receive information associated with detecting a beam failure reference signal as data 526 from the monitoring module 512. For example, the detection module 506 may receive information identifying the transmission from the BS 550 and may detect that the reference signal is a beam failure detection reference signal for detecting beam failure in a component carrier group.

[0078] The determination module 508 may receive information associated with determining that a beam failure has occurred for a component carrier, information associated with identifying a component carrier to which the beam failure applies, and the like, with the information from the detection module 506 as data 528 and / or the information from the reception module 504 as data 530. For example, the determination module 508 may receive information identifying a beam failure detection reference signal, determine that a measurement of the beam failure detection reference signal satisfies a threshold, and determine that a beam failure has occurred. Additionally or alternatively, the determination module 508 may receive base station signaling identifying a component carrier group and may determine that a beam failure detected on a first component carrier in the component carrier group applies to a second component carrier in the component carrier group. Additionally or alternatively, the determination module 508 may determine information related to a TCI status for the component carrier group and may provide data 532 to the reception module 504 to enable the reception module 504 to receive the beam failure detection reference signal on the component carrier group.

[0079] The initiating module 510 may receive information associated with initiating a beam failure recovery procedure from the determining module 508 as data 534. For example, based at least in part on the determining module 508 determining that a beam failure has occurred for the first component carrier and / or the second component carrier, the initiating module 510 may provide data 536 to the transmitting module 514 to cause the transmitting module 514 to transmit data 538 to the BS 550, which initiates the beam failure recovery procedure.

[0080] The apparatus may include executing the aforementioned Figure 4 The method 400 and the like are additional modules for each block of the algorithm. Figure 4 Each block in the method 400, etc. can be performed by a module, and the apparatus may include one or more of those modules. A module can be one or more hardware components specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for processor implementation, or some combination thereof.

[0081] Provided Figure 5 The number and arrangement of modules shown in are examples. In practice, there may be Figure 5 Additional modules, fewer modules, different modules, or differently arranged modules may be used compared to those shown in FIG. Figure 5 Two or more modules shown in the figure may be implemented in a single module, or Figure 5 The single module shown in can be implemented as multiple distributed modules. Additionally or alternatively, Figure 5 The set of modules shown in FIG (e.g., one or more modules) may perform the operations described as being performed by Figure 5 One or more functions are performed by a collection of another modules shown in .

[0082] Figure 6 is a diagram 600 illustrating an example of a hardware implementation for an apparatus 502' employing a processing system 602. The apparatus 502' may be a UE.

[0083] The processing system 602 may be implemented using a bus architecture, generally represented by bus 604. Bus 604 may include any number of interconnecting buses and bridges, depending on the specific application and overall design constraints of the processing system 602. Bus 604 links together various circuits including processor 606, one or more processors and / or hardware modules represented by modules 504, 506, 508, 510, 512, and / or 514, and computer-readable media / memory 608. Bus 604 may also link various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore not described in detail.

[0084] Processing system 602 may be coupled to a transceiver 610. Transceiver 610 is coupled to one or more antennas 612. Transceiver 610 provides components for communicating with various other devices via a transmission medium. Transceiver 610 receives signals from one or more antennas 612, extracts information from the received signals, and provides the extracted information to processing system 602, specifically receive module 504. Furthermore, transceiver 610 receives information from processing system 602 (specifically transmit module 514) and, based at least in part on the received information, generates signals to be applied to one or more antennas 612. Processing system 602 includes processor 606 coupled to computer-readable medium / memory 608. Processor 606 is responsible for general processing, including executing software stored on computer-readable medium / memory 608. When executed by processor 606, the software causes processing system 602 to perform the various functions described herein for any particular device. Computer-readable medium / memory 608 may also be used to store data manipulated by processor 606 when executing the software. The processing system also includes at least one of modules 504, 506, 508, 510, 512, and / or 514. These modules can be software modules running in the processor 606, residing / stored in the computer-readable medium / memory 608, one or more hardware modules coupled to the processor 606, or some combination thereof. The processing system 602 can be a component of the UE 120 and can include at least one of the memory 282 and / or the TX MIMO processor 266, the RX processor 258, and / or the controller / processor 280.

[0085] In some aspects, the apparatus 502 / 502' for wireless communication includes means for detecting a beam failure detection reference signal for a first component carrier in a component carrier group, and means for initiating a beam failure recovery procedure for the first component carrier and the at least one second component carrier based at least in part on measuring the beam failure detection reference signal and identifying at least one second component carrier associated with the beam failure detection reference signal. The aforementioned means may be one or more of the aforementioned modules of the apparatus 502 and / or a processing system 602 of the apparatus 502' configured to perform the functions recited by the aforementioned means. As described elsewhere herein, the processing system 602 may include the TX MIMO processor 266, the RX processor 258, and / or the controller / processor 280. In one configuration, the aforementioned means may be the TX MIMO processor 266, the RX processor 258, and / or the controller / processor 280 configured to perform the functions and / or operations recited herein.

[0086] Provided Figure 6 As an example. Other examples can be combined with Figure 6 Different than described.

[0087] Figure 7 7 is a flow chart of a method 700 of wireless communication. The method may be performed by a BS (eg, BS 110, BS 310, BS 550, apparatus 802 / 802', etc.).

[0088] At 710, in some aspects, the BS may determine a beam failure detection reference signal. For example, the BS (e.g., using the controller / processor 240, etc.) may determine a beam failure detection reference signal for a first component carrier in a component carrier group to enable detection of beam failure for the first component carrier and at least one second component carrier in the component carrier group, as described in more detail above. In a first aspect, the beam failure detection reference signal is a quasi-co-located Type D reference signal corresponding to each unique quasi-co-located Type D source (of the plurality of component carriers) and is configured on a single component carrier in the component carrier group.

[0089] At 720, the BS may transmit a beam failure detection reference signal on the first component carrier. For example, the BS (e.g., using the controller / processor 240, the transmit processor 220, the TX MIMO processor 230, the MOD 232, the antenna 234, etc.) may transmit the beam failure detection reference signal to the UE on the first component carrier in the group of component carriers that share quasi co-location parameters, as described in more detail above. In a second aspect, either alone or in combination with the first aspect, the BS may, based at least in part on determining the beam failure detection reference signal for the first component carrier, forgo using at least one second component carrier to transmit another beam failure detection reference signal, so as to enable detection of beam failure for the first component carrier and the at least one second component carrier.

[0090] At 730, the BS may communicate with the UE to initiate a beam failure recovery procedure for the first component carrier and the second component carrier.

[0091] 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, etc.) can communicate with the UE to initiate a beam failure recovery procedure for the first component carrier and at least one second component carrier in the component carrier group based at least in part on sending a beam failure detection reference signal on the first component carrier, as described in more detail above.

[0092] Method 700 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.

[0093] In a third aspect, alone or in combination with one or more of the first and second aspects, the BS may send signaling identifying a component carrier group to the UE to enable detection of beam failure of at least one second component carrier.

[0094] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the signaling is at least one of radio resource control signaling, MAC control element signaling, downlink control information signaling, or beam update signaling.

[0095] In the fifth aspect, alone or in combination with one or more aspects of the first to fourth aspects, the BS may send signaling to the UE, which is configured to monitor the beam failure detection reference signal on the first component carrier to enable detection of beam failure of at least one second component carrier.

[0096] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the signaling is at least one of radio resource control signaling, MAC control element signaling, downlink control information signaling, or beam update signaling.

[0097] In the seventh aspect, alone or in combination with one or more aspects of the first to sixth aspects, the BS may determine the TCI status of the component carrier group, determine the configuration for sending the beam failure detection reference signal based at least in part on the TCI status of the component carrier group, and send the beam failure detection reference signal based at least in part on the configuration for sending the beam failure detection reference signal.

[0098] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, a TCI state in a TCI state of a CORESET is configured for only one reference signal.

[0099] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, a TCI state in a TCI state of a CORESET is configured for a plurality of reference signals.

[0100] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, the BS may select a beam failure detection reference signal from a plurality of candidate beam failure detection reference signals based at least in part on a rule.

[0101] In the eleventh aspect, alone or in combination with one or more aspects from the first to tenth aspects, the BS may send signaling to the UE instructing the UE to monitor a beam failure detection reference signal on a subset of the component carrier group, where the subset of the component carrier group includes the first component carrier.

[0102] although Figure 7 Example blocks of a method of wireless communication are shown, but in some aspects the method may include Figure 7 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those shown in . Additionally or alternatively, Figure 7 Two or more blocks shown in may be executed in parallel.

[0103] Figure 8 800 is a conceptual data flow diagram illustrating the flow of data between different modules / components / assemblies in an example apparatus 802. The apparatus 802 may be a base station. In some aspects, the apparatus 802 includes a receiving module 804, a determining module 806, a communicating module 808, a discarding module 810, and / or a sending module 812.

[0104] The receiving module 804 may receive information associated with initiating a beam failure detection recovery procedure from the UE 850 as data 820. For example, after transmitting a beam failure detection reference signal on a first component carrier, the receiving module 804 may receive signaling on the first component carrier, the second component carrier, and so on to initiate a beam failure recovery procedure on the first component carrier, the second component carrier, and so on.

[0105] The determination module 806 may determine a beam failure detection reference signal to be transmitted on a first component carrier. For example, the determination module 806 may determine that a particular beam failure detection reference signal resource is to be used for beam failure detection reference signal transmission, and may provide data 822 to the transmission module 812 to cause the transmission module 812 to transmit the beam failure detection reference signal. Additionally or alternatively, the determination module 806 may determine a component carrier group associated with the beam failure detection reference signal, and may cause the transmission module 812 to transmit signaling identifying the component carrier group. Additionally or alternatively, the determination module 806 may provide data 824 to the abandonment module 810 to instruct the apparatus 802 to abandon the transmission of one or more other beam failure detection reference signals on one or more other component carriers.

[0106] The communication module 808 may receive information indicating that the UE 850 has initiated a beam failure recovery procedure from the reception module 804 as data 826. In this case, the communication module 808 may provide information associated with configuring the communication to perform the beam failure recovery procedure to the reception module 804 as data 828 and / or provide information associated with configuring the communication to perform the beam failure recovery procedure to the transmission module 812 as data 830. For example, the communication module 808 may cause the reception module 804 to receive the initiation of the beam failure recovery procedure and / or cause the transmission module 812 to transmit signaling associated with performing beam failure recovery.

[0107] The transmission module 812 may transmit data 832 to the UE 850. For example, the transmission module 812 may transmit a beam failure detection reference signal (e.g., on a first component carrier to implement beam failure recovery on a component carrier group). Additionally or alternatively, the transmission module 812 may transmit signaling identifying the component carrier group, a configuration for receiving the beam failure detection reference signal, etc. Additionally or alternatively, the transmission module 812 may transmit signaling associated with performing beam failure recovery.

[0108] The apparatus may include executing the aforementioned Figure 7 The method 700 and the like are additional modules for each block of the algorithm. Figure 7Each block in the method 700, etc. may be performed by a module, and the apparatus may include one or more of those modules. A module may be one or more hardware components specifically configured to perform the stated process / algorithm, implemented by a processor configured to perform the stated process / algorithm, stored in a computer-readable medium for processor implementation, or some combination thereof.

[0109] supply Figure 8 The number and arrangement of modules shown in are examples. In practice, there may be Figure 8 The modules shown may include additional modules, fewer modules, different modules, or modules arranged differently. Figure 8 Two or more modules shown in may be implemented in a single module, or Figure 8 The single module shown in can be implemented as multiple distributed modules. Additionally or alternatively, Figure 8 The set of modules shown in FIG (e.g., one or more modules) may perform the operations described as being performed by Figure 8 One or more functions are performed by a collection of another modules shown in .

[0110] Figure 9 is a diagram 900 illustrating an example of a hardware implementation for an apparatus 802' employing a processing system 902. The apparatus 802' may be a BS.

[0111] The processing system 902 may be implemented using a bus architecture, generally represented by bus 904. Bus 904 may include any number of interconnecting buses and bridges, depending on the specific application and overall design constraints of the processing system 902. Bus 904 links together various circuits including processor 906, one or more processors and / or hardware modules represented by modules 804, 806, 808, 810, and / or 812, and computer-readable media / memory 908. Bus 904 may also link various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore not described in detail.

[0112] Processing system 902 may be coupled to a transceiver 910. Transceiver 910 is coupled to one or more antennas 912. Transceiver 910 provides components for communicating with various other devices via a transmission medium. Transceiver 910 receives signals from one or more antennas 912, extracts information from the received signals, and provides the extracted information to processing system 902, specifically receive module 804. Furthermore, transceiver 910 receives information from processing system 902 (specifically transmit module 812) and, based at least in part on the received information, generates signals to be applied to one or more antennas 912. Processing system 902 includes a processor 906 coupled to computer-readable media / memory 908. Processor 906 is responsible for general processing, including executing software stored on computer-readable media / memory 908. When executed by processor 906, the software causes processing system 902 to perform the various functions described herein for any particular device. Computer-readable media / memory 908 may also be used to store data manipulated by processor 906 when executing the software. The processing system also includes at least one of modules 804, 806, 808, 810, and / or 812. These modules may be software modules running in the processor 906, resident / stored in the computer-readable medium / memory 908, one or more hardware modules coupled to the processor 906, or some combination thereof. The processing system 902 may be a component of the BS 110 and may include the memory 242 and / or at least one of the TX MIMO processor 230, the RX processor 238, and / or the controller / processor 240.

[0113] In some aspects, the apparatus 802 / 802' for wireless communication includes means for transmitting a beam failure detection reference signal to a UE on a first component carrier in a component carrier group that shares quasi-co-location parameters, and means for communicating with the UE to initiate a beam failure recovery procedure for the first component carrier and at least one second component carrier in the component carrier group based at least in part on transmitting the beam failure detection reference signal on the first component carrier. The aforementioned means may be one or more of the aforementioned means of the apparatus 802 and / or a processing system 902 of the apparatus 802' configured to perform the functions recited by the aforementioned means. As described elsewhere herein, the processing system 902 may include a TX MIMO processor 230, a receive processor 238, and / or a controller / processor 240. In one configuration, the aforementioned means may be the TX MIMO processor 230, the receive processor 238, and / or the controller / processor 240 configured to perform the functions and / or operations described herein.

[0114] Provided Figure 9 As an example. Other examples can be combined with Figure 9 Different than described.

[0115] It should be understood that the specific order or hierarchy of blocks in the disclosed processes / flowcharts is illustrative of example methods. Based on design preferences, it should be understood that the specific order or hierarchy of blocks in the processes / flowcharts may be rearranged. Furthermore, some blocks may be combined or omitted. The accompanying method claims present elements of the various blocks in a sample order and are not meant to be limited to the specific order or hierarchy presented.

[0116] The above description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects. Therefore, the claims are not intended to be limited to the various aspects shown herein, but to conform to the full scope consistent with the language claims, wherein unless clearly stated otherwise, the elements mentioned in the singular are not intended to represent "one and only one", but "one or more". The word "exemplary" is used herein to mean "serving as an example, instance or illustration". Any aspect described as "exemplary" herein is not necessarily interpreted as being preferred or superior to other aspects. Unless otherwise clearly stated, the term "some" refers to one or more. Combinations such as "at least one of A, B or C", "at least one of A, B and C" and "A, B, C or any combination thereof" include any combination of A, B, and / or C, and may include multiple A, multiple B or multiple C. Specifically, combinations such as "at least one of A, B, or C," "at least one of A, B, and C," and "A, B, C, or any combination thereof" can be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combination can include one or more members of A, B, or C. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is expressly recited in the claims. No claim element should be construed as part-plus-function unless the element is expressly recited using the phrase "means for..."

Claims

1. A method for wireless communication performed by a user equipment (UE), comprising: detecting a beam failure detection reference signal on a single first component carrier in a component carrier group, wherein at least one second component carrier in the component carrier group and the first component carrier share a quasi co-location parameter, wherein the beam failure detection reference signal is a quasi co-location type D reference signal corresponding to each unique quasi co-location type D source in a plurality of component carriers, and wherein the beam failure detection reference signal is configured only on the single first component carrier in the component carrier group; as well as A beam failure recovery procedure is initiated for the first component carrier and the at least one second component carrier based at least in part on measurements of the beam failure detection reference signal detected on the single first component carrier and identification of the at least one second component carrier associated with the beam failure detection reference signal.

2. The method according to claim 1, further comprising: determining that the measurement of the beam failure detection reference signal satisfies a threshold indicating beam failure for the first component carrier; and Initiating the beam failure recovery process includes: The beam failure recovery procedure is initiated based at least in part on a determination that the measurement of the beam failure detection reference signal satisfies the threshold.

3. The method according to claim 1, further comprising: monitoring resources of the component carrier group; and The detecting the beam failure detection reference signal for the first component carrier includes: The beam failure detection reference signal for the first component carrier is detected based at least in part on monitoring the resources across the group of component carriers.

4. The method according to claim 1, further comprising: receiving base station signaling identifying the component carrier group; as well as The at least one second component carrier is determined based at least in part on the base station signaling identifying the component carrier group.

5. The method according to claim 4, wherein the base station signaling is at least one of the following: Radio Resource Control Signaling, Medium Access Control MAC Control Element Signaling, Downlink control information signaling, or Beam update signaling.

6. The method according to claim 1, further comprising: Base station signaling is received, wherein the base station signaling is configured to monitor the beam failure detection reference signal on the first component carrier to enable detection of beam failure of the at least one second component carrier.

7. The method according to claim 1, further comprising: receiving base station signaling indicating that the UE is to monitor the beam failure detection reference signal on a subset of the component carrier group, wherein the subset of the component carrier group includes the first component carrier.

8. The method according to claim 7, wherein the base station signaling is at least one of the following: Radio Resource Control Signaling, Medium Access Control MAC Control Element Signaling, Downlink control information signaling, or Beam update signaling.

9. The method according to claim 1, further comprising: determining a configuration for monitoring the beam failure detection reference signal based at least in part on a control resource set CORESET of the component carrier group sending a control indicator TCI; and Receiving the beam failure detection reference signal includes: The beam failure detection reference signal is received based at least in part on the configuration for monitoring the beam failure detection reference signal.

10. The method of claim 9, wherein the TCI state of the CORESET is configured for only one reference signal; and Each unique reference signal in each CORESET TCI state is a beam failure detection reference signal.

11. The method of claim 9, wherein the TCI state of the CORESET is configured for multiple reference signals; and Each unique quasi-co-located Type D reference signal in each CORESET TCI state is a beam failure detection reference signal.

12. The method of claim 1, wherein the beam failure detection reference signal is selected from a plurality of candidate beam failure detection reference signals based at least in part on a rule.

13. The method of claim 12, wherein the rule comprises selecting the beam failure detection reference signal having the lowest reference signal identifier value.

14. A method of wireless communication performed by a base station BS, comprising: transmitting a beam failure detection reference signal to a user equipment (UE) on a single first component carrier in a component carrier group that shares a quasi co-location parameter, wherein the beam failure detection reference signal is a quasi co-location type D reference signal corresponding to each unique quasi co-location type D source in a plurality of component carriers, and wherein the beam failure detection reference signal is configured only on the single first component carrier in the component carrier group; as well as Based at least in part on sending the beam failure detection reference signal only on the first component carrier, communicating with the UE to initiate a beam failure recovery procedure for the first component carrier and at least one second component carrier in the component carrier group.

15. The method according to claim 14, further comprising: Signaling identifying the component carrier group is sent to the UE to enable detection of beam failure of the at least one second component carrier.

16. The method of claim 15, wherein the signaling is at least one of: Radio Resource Control Signaling, Medium Access Control MAC Control Element Signaling, Downlink control information signaling, or Beam update signaling.

17. The method according to claim 14, further comprising: Send signaling to the UE to configure monitoring of the beam failure detection reference signal on the first component carrier, so as to detect the beam failure of the at least one second component carrier.

18. The method according to claim 14, further comprising: Signaling is sent to the UE indicating that the UE is to monitor the beam failure detection reference signal on a subset of the component carrier group, wherein the subset of the component carrier group includes the first component carrier.

19. The method of claim 18, wherein the signaling is at least one of: Radio Resource Control Signaling, Medium Access Control MAC Control Element Signaling, Downlink control information signaling, or Beam update signaling.

20. The method of claim 14, further comprising: determining a configuration for monitoring the beam failure detection reference signal based at least in part on a control resource set CORESET transmission control indicator TCI status of the component carrier group; and The sending of the beam failure detection reference signal includes: The beam failure detection reference signal is transmitted based at least in part on the configuration for monitoring the beam failure detection reference signal.

21. The method of claim 20, wherein the TCI state of the CORESET is configured for only one reference signal; and Each unique reference signal in each CORESET TCI state is a beam failure detection reference signal.

22. The method of claim 20, wherein the TCI state of the CORESET is configured for multiple reference signals; and Each unique quasi-co-located Type D reference signal in each CORESET TCI state is a beam failure detection reference signal.

23. The method of claim 14, further comprising: The beam failure detection reference signal is selected from a plurality of candidate beam failure detection reference signals based at least in part on a rule.

24. A user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors operatively coupled to the memory, the one or more processors configured to cause the UE to: detecting a beam failure detection reference signal on a single first component carrier in a component carrier group, wherein at least one second component carrier in the component carrier group and the first component carrier share a quasi co-location parameter, wherein the beam failure detection reference signal is a quasi co-location type D reference signal corresponding to each unique quasi co-location type D source in a plurality of component carriers, and wherein the beam failure detection reference signal is configured only on the single first component carrier in the component carrier group; as well as A beam failure recovery procedure is initiated for the first component carrier and the at least one second component carrier based at least in part on measurements of the beam failure detection reference signal detected on the single first component carrier and identification of the at least one second component carrier associated with the beam failure detection reference signal.

25. A base station BS for wireless communication, comprising: Memory; as well as One or more processors operatively coupled to the memory, the one or more processors configured to cause the BS to: transmitting a beam failure detection reference signal to a user equipment (UE) on a single first component carrier in a component carrier group that shares a quasi co-location parameter, wherein the beam failure detection reference signal is a quasi co-location type D reference signal corresponding to each unique quasi co-location type D source in a plurality of component carriers, and wherein the beam failure detection reference signal is configured only on the single first component carrier in the component carrier group; as well as Based at least in part on sending the beam failure detection reference signal only on the first component carrier, communicating with the UE to initiate a beam failure recovery procedure for the first component carrier and at least one second component carrier in the component carrier group.

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