Techniques for configuring a mac-ce bitmap for beam failure recovery

Abstract

Various aspects of the disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) can configure a bitmap in a medium access control control element (MAC-CE) to indicate beam failure information for one or more serving cells or one or more serving cell groups. The UE can transmit the MAC-CE to a base station via at least one serving cell. Numerous other aspects are provided.

Description

Technical Field

[0001] This disclosure generally relates to wireless communication and techniques for configuring a Media Access Control Control Element (MAC-CE) bitmap for beam fault recovery. Background Technology

[0002] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems employ multiple access technologies that enable 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-Advanced is an enhancement set to the Universal Mobile Telecommunications System (UMTS) mobile standard issued by the 3rd Generation Partnership Project (3GPP).

[0003] Wireless communication networks may include multiple base stations (BSs) capable of supporting communication for multiple user equipments (UEs). UEs can communicate with base stations (BSs) via downlinks and uplinks. A downlink (or forward link) refers to the communication link from the BS to the UE, while 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), New Radio (NR) BS, 5G Node B, etc.

[0004] The aforementioned multiple access technologies have been adopted in various telecommunications standards to provide a universal protocol that enables different user equipment to communicate at the municipal, national, regional, and even global levels. New Radio (NR), also known as 5G, is an enhancement set of the LTE mobile standard promulgated by the 3rd Generation Partnership Project (3GPP). NR is designed to better support mobile broadband internet access by: improving spectrum efficiency, reducing costs, improving service, utilizing new spectrum, and better integration with other open standards using Orthogonal Frequency Division Multiplexing (OFDM) with a Cyclic Prefix (CP) on the downlink (DL) (CP-OFDM), CP-OFDM and / or SC-FDM (e.g., also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink (UL), and supporting beamforming, multiple-input multiple-output (MIMO) antenna technologies, and carrier aggregation. However, with the increasing demand for mobile broadband access, LTE and NR technologies require further improvements. Preferably, these improvements should be applicable to other multiple access technologies and telecommunications standards that employ these technologies. Summary of the Invention

[0005] In some aspects, a wireless communication method performed by a user equipment (UE) may include: configuring a bitmap in a medium access control element (MAC-CE) to indicate beam fault information for one or more serving cells or one or more groups of serving cells; and transmitting the MAC-CE to a base station via at least one serving cell.

[0006] In a first aspect, the configuration bitmap includes: each bit in at least a subset of the bits included in the configuration bitmap to indicate whether a beam failure of one or more beams has occurred in an associated serving cell of one or more serving cells, wherein the one or more serving cells are configured with beam failure detection capability. In a second aspect, alone or in combination with the first aspect, another subset of the bitmap includes one or more unused bits. In a third aspect, alone or in combination with one or more of the first and second aspects, the bitmap is included together with one or more reserved bits in a byte of the MAC-CE. In a fourth aspect, alone or in combination with one or more of the first to third aspects, the method further includes configuring one or more bytes associated with one or more serving cells in the MAC-CE, wherein one byte of the one or more bytes is associated with a serving cell of the one or more serving cells, including: a first field indicating whether the byte includes an indication of a new beam for the serving cell, and a second field including the indication of the new beam.

[0007] In the fifth aspect, individually or in combination with one or more of the first to fourth aspects, the configuration bitmap includes each bit from at least a subset of the bits included in the configuration bitmap to indicate whether a beam failure of one or more beams has occurred in at least a subset of one or more serving cell groups, wherein the serving cells within each group are quasi-co-located. In the sixth aspect, individually or in combination with one or more of the first to fifth aspects, another subset of the bitmap includes one or more unused bits. In the seventh aspect, individually or in combination with one or more of the first to sixth aspects, the bitmap is included together with one or more reserved bits in a byte of the MAC-CE. In the eighth aspect, individually or in combination with one or more of the first to seventh aspects, the bitmap is included together with one or more new beam indicator bits in a byte of the MAC-CE, and each of the one or more new beam indicator bits indicates whether the associated byte in the MAC-CE includes an indication of a new beam for the associated serving cell group.

[0008] In the ninth aspect, individually or in combination with one or more of the first to eighth aspects, the configuration bitmap includes: configuring each bit in at least a subset of the bits included in the bitmap to indicate that a beam failure of one or more beams has occurred in a corresponding serving cell of one of the one or more serving cell groups. In the tenth aspect, individually or in combination with one or more of the first to ninth aspects, the method further includes configuring each of one or more bytes in the MAC-CE to indicate the same new beam for an associated serving cell in the serving cell group. In the eleventh aspect, individually or in combination with one or more of the first to tenth aspects, the bitmap is included in a byte having one or more other bits indicating a beam failure for one of the one or more serving cell groups, and each bit in the bitmap indicating whether a new beam is indicated for an associated serving cell in the serving cell group.

[0009] In some aspects, a UE for wireless communication may include: a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to configure a bitmap in the MAC-CE to indicate beam fault information for one or more serving cells or one or more groups of serving cells; and to transmit the MAC-CE to a base station via at least one serving cell.

[0010] In a first aspect, the one or more processors, when configuring a bitmap, are configured to configure each bit in at least a subset of the bits included in the bitmap to indicate whether a beam failure of one or more beams has occurred in an associated serving cell of one or more serving cells, wherein the one or more serving cells are configured with beam failure detection capability. In a second aspect, alone or in combination with the first aspect, another subset of the bitmap includes one or more unused bits. In a third aspect, alone or in combination with one or more of the first and second aspects, the bitmap is included together with one or more reserved bits in a byte of the MAC-CE. In a fourth aspect, alone or in combination with one or more of the first to third aspects, the one or more processors are further configured to configure one or more bytes in the MAC-CE associated with one or more serving cells, wherein one byte of the one or more bytes is associated with a serving cell of one or more serving cells, including: a first field indicating whether the byte includes an indication of a new beam for the serving cell, and a second field including the indication of a new beam.

[0011] In the fifth aspect, individually or in combination with one or more of the first to fourth aspects, the processor is configured, when configuring the bitmap, to configure each bit in at least a subset of the bits included in the bitmap to indicate whether a beam failure of one or more beams has occurred in at least a subset of one or more serving cell groups, wherein the serving cells within each group are quasi-co-located. In the sixth aspect, individually or in combination with one or more of the first to fifth aspects, another subset of the bitmap includes one or more unused bits. In the seventh aspect, individually or in combination with one or more of the first to sixth aspects, the bitmap is included together with one or more reserved bits in a byte of the MAC-CE. In the eighth aspect, individually or in combination with one or more of the first to seventh aspects, the bitmap is included together with one or more new beam indicator bits in a byte of the MAC-CE, and each of the one or more new beam indicator bits indicates whether the associated byte in the MAC-CE includes an indication of a new beam for the associated serving cell group.

[0012] In the ninth aspect, individually or in combination with one or more of the first to eighth aspects, the one or more processors are configured, when configuring the bitmap, to configure each bit in at least a subset of the bits included in the bitmap to indicate that a beam failure of one or more beams has occurred in a corresponding serving cell of one of the one or more serving cell groups. In the tenth aspect, individually or in combination with one or more of the first to ninth aspects, the one or more processors are further configured to configure each of one or more bytes in the MAC-CE to indicate the same new beam for an associated serving cell in the serving cell group. In the eleventh aspect, individually or in combination with one or more of the first to tenth aspects, the bitmap is included in a byte having one or more other bits indicating a beam failure for one of the one or more serving cell groups, and each bit in the bitmap indicating whether a new beam is indicated for an associated serving cell in the serving cell group.

[0013] 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 the UE, the one or more instructions may cause the one or more processors to configure a bitmap in the MAC-CE to indicate beam fault information for one or more serving cells or one or more groups of serving cells; and transmit the MAC-CE to a base station via at least one serving cell.

[0014] In a first aspect, one or more instructions that cause one or more processors to configure a bitmap cause the one or more processors to: configure each bit in at least a subset of the bits included in the bitmap to indicate whether a beam failure of one or more beams has occurred in an associated serving cell of one or more serving cells, wherein the one or more serving cells are configured with beam failure detection capability. In a second aspect, alone or in combination with the first aspect, another subset of the bitmap includes one or more unused bits. In a third aspect, alone or in combination with one or more of the first and second aspects, the bitmap is included together with one or more reserved bits in a byte of the MAC-CE. In a fourth aspect, alone or in combination with one or more of the first to third aspects, when executed by one or more processors, the one or more instructions also cause the one or more processors to: configure one or more bytes in the MAC-CE associated with one or more serving cells, wherein one byte of the one or more bytes is associated with a serving cell of one or more serving cells, including: a first field indicating whether the byte includes an indication of a new beam for the serving cell, and a second field including the indication of the new beam.

[0015] In the fifth aspect, individually or in combination with one or more of the first to fourth aspects, one or more instructions of a processor configure a bitmap to: configure each bit in at least a subset of the bits included in the bitmap to indicate whether a beam failure of one or more beams has occurred in at least a subset of one or more serving cell groups, wherein the serving cells within each group are quasi-co-located. In the sixth aspect, individually or in combination with one or more of the first to fifth aspects, another subset of the bitmap includes one or more unused bits. In the seventh aspect, individually or in combination with one or more of the first to sixth aspects, the bitmap is included together with one or more reserved bits in a byte of the MAC-CE. In the eighth aspect, individually or in combination with one or more of the first to seventh aspects, the bitmap is included together with one or more new beam indicator bits in a byte of the MAC-CE, and each of the one or more new beam indicator bits indicates whether the associated byte in the MAC-CE includes an indication of a new beam for the associated serving cell group.

[0016] In the ninth aspect, individually or in combination with one or more of the first to eighth aspects, one or more instructions of a processor configure a bitmap to: configure each bit in at least a subset of the bits included in the bitmap to indicate that a beam failure of one or more beams has occurred in a corresponding serving cell of one or more serving cell groups. In the tenth aspect, individually or in combination with one or more of the first to ninth aspects, when executed by one or more processors, one or more instructions further cause the one or more processors to: configure each of one or more bytes in the MAC-CE to indicate the same new beam for an associated serving cell in a serving cell group. In the eleventh aspect, individually or in combination with one or more of the first to tenth aspects, the bitmap is included in a byte having one or more other bits indicating a beam failure of one or more serving cell groups, and each bit in the bitmap indicating whether a new beam is indicated for an associated serving cell in a serving cell group.

[0017] In some aspects, the apparatus for wireless communication may include: components for configuring a bitmap in the MAC-CE to indicate beam fault information for one or more serving cells or one or more groups of serving cells; and components for transmitting the MAC-CE to a base station via at least one serving cell.

[0018] In a first aspect, the components for configuring the bitmap include: components for configuring each bit in at least a subset of the bits included in the bitmap to indicate whether a beam failure of one or more beams has occurred in an associated serving cell of one or more serving cells, wherein the one or more serving cells are configured with beam failure detection capability. In a second aspect, alone or in combination with the first aspect, another subset of the bitmap includes one or more unused bits. In a third aspect, alone or in combination with one or more of the first and second aspects, the bitmap is included together with one or more reserved bits in a byte of the MAC-CE. In a fourth aspect, alone or in combination with one or more of the first to third aspects, the apparatus further includes components for configuring one or more bytes associated with one or more serving cells in the MAC-CE, wherein one byte of the one or more bytes is associated with a serving cell of one or more serving cells, including: a first field indicating whether the byte includes an indication of a new beam for the serving cell, and a second field including the indication of a new beam.

[0019] In the fifth aspect, individually or in combination with one or more of the first to fourth aspects, the component for configuring the bitmap includes: a component for configuring each bit in at least a subset of the bits included in the bitmap to indicate whether a beam failure of one or more beams has occurred in at least a subset of one or more serving cell groups, wherein the serving cells within each group are quasi-co-located. In the sixth aspect, individually or in combination with one or more of the first to fifth aspects, another subset of the bitmap includes one or more unused bits. In the seventh aspect, individually or in combination with one or more of the first to sixth aspects, the bitmap is included together with one or more reserved bits in a byte of the MAC-CE. In the eighth aspect, individually or in combination with one or more of the first to seventh aspects, the bitmap is included together with one or more new beam indicator bits in a byte of the MAC-CE, and each of the one or more new beam indicator bits indicates whether the associated byte in the MAC-CE includes an indication of a new beam for the associated serving cell group.

[0020] In a ninth aspect, individually or in combination with one or more of the first to eighth aspects, the component for configuring the bitmap includes: a component for configuring each bit in at least a subset of the bits included in the bitmap to indicate that a beam failure of one or more beams has occurred in a corresponding serving cell of one of the one or more serving cell groups. In a tenth aspect, individually or in combination with one or more of the first to ninth aspects, the method further includes configuring each of one or more bytes in the MAC-CE to indicate the same new beam for an associated serving cell in the serving cell group. In an eleventh aspect, individually or in combination with one or more of the first to tenth aspects, the bitmap is included in a byte having one or more other bits indicating a beam failure for one of the one or more serving cell groups, and each bit in the bitmap indicating whether a new beam is indicated for an associated serving cell in the serving cell group.

[0021] The aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication equipment, and processing systems, as generally described herein with reference to the accompanying drawings and description, and as illustrated by the accompanying drawings and description.

[0022] The foregoing has provided a fairly broad overview of the features and technical advantages of the examples according to this disclosure in order to better understand the following detailed description. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as the basis for modifying or designing other structures for achieving the same purpose as this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The features, organization, and operation of the concepts disclosed herein, as well as their associated advantages, can be better understood from the following description when considered in conjunction with the accompanying drawings. Each drawing is provided for illustrative and descriptive purposes and not as a definition of limitation of the claims. Attached Figure Description

[0023] To gain a more detailed understanding of the foregoing features of this disclosure, reference can be made to various aspects briefly outlined above, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of this disclosure and should therefore not be considered as limiting its scope, as the description may allow for other equivalent aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0024] Figure 1 This is a diagram illustrating an example of a wireless communication network according to various aspects of this disclosure.

[0025] Figure 2 This is a diagram illustrating an example of a base station communicating with a user equipment (UE) in a wireless communication network according to various aspects of this disclosure.

[0026] Figure 3 and Figures 4A-4E This is a diagram illustrating an example of a bitmap of a Media Access Control Control Element (MAC-CE) configured for beam fault recovery according to various aspects of this disclosure.

[0027] Figure 5 This is a diagram illustrating, for example, an example process performed by a UE according to various aspects of this disclosure.

[0028] Figure 6 This is a conceptual data flow diagram illustrating the data flow between different components in an example device according to various aspects of this disclosure. Detailed Implementation

[0029] Various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be embodied in many different forms and should not be construed as limited to any particular structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of this disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will understand that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, any number of aspects set forth herein may be used to implement an apparatus or practice. Furthermore, the scope of this disclosure is intended to cover an apparatus or method that is practiced using a structure, function, or structure and function other than or different from the aspects of this disclosure set forth herein. It should be understood that any aspect of this disclosure disclosed herein may be embodied by one or more elements of the claims.

[0030] Various devices and techniques will now be used to illustrate several aspects of a telecommunications system. These devices and techniques will be described in detail below and illustrated in the accompanying drawings by various boxes, modules, components, circuits, steps, processes, algorithms, etc. (collectively, “elements”). These elements can be implemented using hardware, software, or a combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the entire system.

[0031] It should be noted that while this document may use terms commonly associated with 3G and / or 4G wireless technologies to describe aspects, aspects of this disclosure may be applied to other generation-based communication systems, such as 5G and later, including NR technologies.

[0032] Figure 1This is a diagram illustrating a wireless network 100 in which various aspects of this disclosure can be practiced. Wireless network 100 can be an LTE network or some other wireless network, such as a 5G or NR network. Wireless network 100 can include multiple BS 110s (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 can also be referred to as a base station, NR BS, Node B, gNB, 5G Node B (NB), access point, Transmit / Receive Point (TRP), etc. Each BS can provide communication coverage for a specific geographic area. In 3GPP, depending on the context in which the terminology is used, the term "cell" can refer to the coverage area of ​​a BS and / or the BS subsystem serving that coverage area.

[0033] A BS can provide communication coverage for macrocells, picocells, femtocells, and / or other types of cells. A macrocell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access for UEs with service subscriptions. A picocell can cover a relatively small geographic area and can allow unrestricted access for UEs with service subscriptions. A femtocell can cover a relatively small geographic area (e.g., a home) and can allow restricted access for UEs associated with that femtocell (e.g., UEs in a Closed Subscriber Group (CSG)). A BS used for macrocells can be referred to as a macro BS. A BS used for picocells can be referred to as a pico BS. A BS used for femtocells can be referred to as a femtocell BS or a home BS. Figure 1 In the example shown, BS 110a can be a macro BS for macro cell 102a, BS 110b can be a pico BS for pico cell 102b, and BS 110c can be a femto BS for femto cell 102c. A BS can support one or more (e.g., three) cells. The terms “eNB,” “base station,” “NR BS,” “gNB,” “TRP,” “AP,” “Node B,” “5G NB,” and “cell” are used interchangeably herein.

[0034] In some aspects, the cell may not be fixed, and the geographical area of ​​the cell may move depending on the location of the mobile BS. In some aspects, BSs may interconnect with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 using any suitable transmitting network through various types of backhaul interfaces (such as direct physical connections, virtual networks, etc.).

[0035] The wireless network 100 may also include a relay station. A relay station is an entity that receives data transmissions from an upstream station (e.g., a BS or a UE) and transmits data to a downstream station (e.g., a UE or a BS). A relay station can also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown, relay station BS 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay station can also be referred to as a relay BS, relay base station, relay, etc.

[0036] Wireless network 100 can be a heterogeneous network, including different types of Base Stations (BSs), such as macro BSs, pico BSs, femto BSs, and relay BSs. These different types of BSs can have different transmit power levels, different coverage areas, and different effects on interference in wireless network 100. For example, macro BSs can have higher transmit power levels (e.g., 5 watts to 40 watts), while pico BSs, femto BSs, and relay BSs can have lower transmit power levels (e.g., 0.1 watts to 2 watts).

[0037] Network controller 130 can be coupled to a collection of BSs and can provide coordination and control for these BSs. Network controller 130 can communicate with the BSs via backhaul. BSs can also communicate with each other directly or indirectly, for example, via wireless or wired backhaul.

[0038] UEs 120 (e.g., 120a, 120b, 120c) may be distributed 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. 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, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or instrument, a biosensor / device, a wearable device (smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or satellite broadcasting, etc.), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a GPS device, or any other suitable device configured to communicate via wireless or wired media.

[0039] Some UEs can be considered Machine-Type Communication (MTC) or Evolved or Enhanced Machine-Type Communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., that can communicate with base stations, another device (e.g., remote devices), or some other entity. Wireless nodes can provide connectivity, for example, to or from networks (e.g., wide area networks such as the Internet or cellular networks), via wired or wireless communication links. Some UEs can be considered Internet of Things (IoT) devices, and / or can be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs can be considered Customer Premises Equipment (CPE). UE 120 can be included within a housing that houses the components of UE 120, such as processor components, memory components, etc.

[0040] Typically, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific Radio Access Platform (RAT) and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, air interface, etc. A frequency can also be referred to as a carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0041] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary to communicate with each other). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, 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, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0042] As pointed out above, Figure 1 This is provided as an example. Other examples may be provided in conjunction with [the example provided]. Figure 1 The descriptions are different.

[0043] Figure 2 A block diagram of a design 200 for base station 110 and UE 120 is shown, which can be Figure 1 One of the base stations and one of the UEs. 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, where typically T≥1 and R≥1.

[0044] At base station 110, transmitting processor 220 can receive data from one or more UEs from data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQI) received from the UE, process (e.g., code and modulate) data for each UE based at least in part on the selected MCS(s) for the UE, and provide data symbols for all UEs. Transmitting processor 220 can also process system information (e.g., for semi-static resource allocation information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper-layer signaling, etc.), and provide overhead symbols and control symbols. Transmitting processor 220 can also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS)) and synchronization signals (e.g., primary synchronization signal (PSS) and secondary synchronization signal (SSS)). If applicable, the transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, and can provide T output symbol streams to T modulators (MODs) 232a to 232t. Each modulator 232 can process its corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 can further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t can be transmitted via T antennas 234a to 234t, respectively. Position coding can be used to generate synchronization signals to transmit additional information, according to various aspects described in more detail below.

[0045] At UE 120, antennas 252a to 252r can receive downlink signals from base station 110 and / or other base stations, and can provide the received signals to demodulators (DEMODs) 254a to 254r respectively. Each demodulator 254 can adjust (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain an input sample. Each demodulator 254 can further process the input sample (e.g., for OFDM, etc.) to obtain the received symbols. MIMO detector 256 can obtain the received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols if applicable, and provide the detected symbols. Receiver processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to data sink 260, and provide decoded control information and system information to controller / processor 280. The channel processor can determine the Received Reference Signal Power (RSRP), Received Signal Strength Indicator (RSSI), Received Reference Signal Quality (RSRQ), Channel Quality Indicator (CQI), etc. In some aspects, one or more components of the UE 120 may be included in the housing.

[0046] On the uplink, at UE 120, the transmitting processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmitting processor 264 can also generate reference symbols for one or more reference signals. If applicable, the symbols from the transmitting processor 264 can be pre-encoded by the TX MIMO processor 266, further processed by modulators 254a to 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to base station 110. At base station 110, uplink signals from UE 120 and other UEs can be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236 (if applicable), and further processed by receiving processor 238 to obtain decoded data and control information transmitted by user equipment 120. Receiving processor 238 can provide the decoded data to data sink 239 and provide the decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and communicate with network controller 130 via communication unit 244. Network controller 130 may include communication unit 294, controller / processor 290 and memory 292.

[0047] As described in more detail elsewhere in this document, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2Any other component(s) may execute one or more techniques associated with the Media Access Control (MAC-CE) bitmap configured for beam fault recovery. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component(s) can perform or direct, for example Figure 5 The processing 500 and / or other processing described herein. Memory 242 and 282 may respectively store data and program code for base station 110 and UE 120. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, the one or more instructions (when executed by one or more processors of base station 110 and / or UE 120) may execute or direct, for example... Figure 5 The scheduler 246 can schedule the UE for data transmission on the downlink and / or uplink. (This refers to the processing of 500 and / or other processing described herein.)

[0048] In some aspects, UE 120 may include components for configuring a bitmap in the MAC-CE to indicate beam fault information for one or more serving cells or groups of one or more serving cells, components for transmitting the MAC-CE to at least one of the one or more serving cells, etc. In some aspects, such components may include combinations of Figure 2 One or more components of the described UE 120, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, etc.

[0049] As pointed out above, Figure 2 This is provided as an example. Other examples may be provided in conjunction with [the example provided]. Figure 2 The descriptions are different.

[0050] Beam Failure Recovery (BFR) and Beam Failure Recovery Request (BFRQ) can be used in wireless communications to facilitate recovery from beam failures. As used herein, the term "beam failure" can refer to a beam malfunction, poor beam conditions and / or degraded channel conditions, transmission failure on the beam, or one or more beam parameters failing to meet thresholds. A UE can request beam failure recovery by sending an indication of a new beam, a new synchronization signal (SS) block, or a channel state information reference signal (CSI-RS) and initiating a random access control channel (RACH) procedure. In response to completing beam failure recovery, the BS can send a downlink allocation or uplink grant on the physical downlink control channel (PDCCH). For certain operating modes (such as Ultra Reliable Low Latency Communication (URLLC) operating modes or deployments), such procedures may not meet low latency requirements or constraints.

[0051] The aspects described herein provide techniques for configuring MAC-CE bitmaps for beam fault recovery. In some aspects, UE 120 transmits beam fault information in MAC-CE for beam fault recovery. MAC-CE-based beam fault recovery can enable beam fault recovery enhancements, such as recovering beam faults without initiating a RACH procedure. Beam fault recovery enhancements enable wireless network devices (e.g., UEs and base stations) to perform beam fault recovery operations faster and more reliably, thereby reducing latency and increasing throughput. Beam fault recovery enhancements can be implemented in URLLC.

[0052] Furthermore, in some aspects, UE 120 can reduce the overhead in MAC-CE consumed by beam fault information by including beam fault information in a bitmap included in MAC-CE. In these cases, each bit may indicate a beam fault of one or more beams of a corresponding serving cell configured with beam fault detection capability (e.g., configured to perform beam fault recovery operation with a UE in a wireless network), may indicate a beam fault of one or more beams of a corresponding group of quasi-co-located serving cells, may indicate whether a new beam is indicated in MAC-CE for each cell in the serving cell group (for which beam faults are indicated in MAC-CE), etc.

[0053] Figure 3 This is a diagram of example 300 of a MAC-CE bitmap configured for beam fault recovery according to various aspects of this disclosure. Figure 3 As shown, Example 300 may include UE 120 and one or more serving cells (e.g., cell 1 to cell n) provided by one or more base stations 110. Example 300 may include... Figure 3The number of serving cells shown may be more or less. One or more serving cells may be serving cells of UE 120. In some aspects, each serving cell is provided by a different base station 110. In some aspects, each serving cell is provided by the same base station 110. In some aspects, a subset of serving cells is provided by different base stations 110, and another subset of serving cells is provided by the same base station 110.

[0054] like Figure 3 As shown in the figure, and referring to reference numeral 302, Example 300 provides an example in which UE 120 configures a bitmap in the MAC-CE to indicate beam fault information for one or more serving cells that are configured with beam fault detection capability (e.g., configured to perform beam fault recovery operation with the UE in the wireless network). Figure 3 As further shown, the MAC-CE can include multiple bytes or octets. One byte of the MAC-CE can include a bitmap. Each bit in the bitmap can correspond to the serving cell of the one or more serving cells. Furthermore, each bit in the bitmap can indicate whether a beam failure has occurred in the associated serving cell of the one or more serving cells. For example, the first bit in the bitmap can indicate whether a beam failure has occurred for cell 1 (e.g., bit C1), the second bit in the bitmap can indicate whether a beam failure has occurred for cell 2 (e.g., bit C2), and so on.

[0055] The values ​​indicated by the bits in the bitmap can indicate whether the associated serving cell has experienced a beam failure. For example, a value of 1 can indicate a beam failure for the associated serving cell, and a value of 0 can indicate no beam failure for the associated serving cell. As another example, a value of 0 can indicate a beam failure for the associated serving cell, and a value of 1 can indicate no beam failure for the associated serving cell.

[0056] In some respects, the bytes including the bitmap also include one or more reserved bits (in... Figure 3 (indicated by "R") and / or one or more unused bits (in) Figure 3 (Indicated by "U" in the middle). Reserved bits can be bits reserved for other purposes or for future use. Unused bits can be used to expand the size of the bitmap to indicate beam faults for different numbers of serving cells.

[0057] The MAC-CE may include additional bytes to indicate new beaming information for one or more serving cells. Each additional byte may be associated with a corresponding serving cell of one or more serving cells. Each additional byte may include an "AC" field of one or more bits. The value indicated by the AC field may indicate whether a new beam is indicated for the serving cell associated with the additional byte. For example, a value of 1 in the AC field of a byte associated with cell 1 (e.g., C1) may indicate that the byte includes a new beaming indication for cell 1 in another field, while a value of 0 in the AC field of a byte associated with cell 1 may indicate that the byte does not include a new beaming indication for cell 1. As another example, a value of 0 in the AC field of a byte associated with cell 1 (e.g., C1) may indicate that the byte includes a new beaming indication for cell 1 in another field, while a value of 1 in the AC field of a byte associated with cell 1 may indicate that the byte does not include a new beaming indication for cell 1. In this way, if the value indicated by the AC field for a byte indicates that the byte does not include a new beam indication, the base station 110 can stop reading the byte after reading the AC field. This saves processing and memory resources and reduces latency in processing MAC-CE. Each additional byte may also include one or more reserved bits.

[0058] like Figure 3 As further shown, and referring to reference numeral 304, UE 120 may send the MAC-CE to at least one of one or more serving cells after configuring a bitmap in the MAC-CE. For example, UE 120 may send the MAC-CE to a single serving cell (e.g., cell 1). As another example, UE 120 may send the MAC-CE to a subset of one or more serving cells (e.g., to a serving cell indicated in the MAC-CE as having a beam fault). In some aspects, UE 120 may send the MAC-CE to each of one or more serving cells.

[0059] A base station 110 associated with one of one or more serving cells can receive a MAC-CE and can perform one or more BFR operations based at least in part on the beam fault information included in the MAC-CE. For example, the base station 110 can configure and / or activate a new beam indicated in the MAC-CE, and can transmit downlink transmissions on the new beam indicated in the MAC-CE, etc.

[0060] In this way, UE 120 can reduce the overhead in MAC-CE consumed by beam fault information by including beam fault information in a bitmap included in MAC-CE. In these cases, each bit can indicate a beam fault of one or more beams of the corresponding serving cell configured with beam fault detection capability.

[0061] As pointed out above, Figure 3 This is provided as an example. Other examples may be provided in conjunction with [the example provided]. Figure 3 The descriptions are different.

[0062] Figures 4A-4E This is a diagram illustrating one or more examples 400 of a MAC-CE bitmap configured for beam fault recovery according to various aspects of this disclosure. Figures 4A-4E As shown, (multiple) examples 400 may include UE 120 and multiple serving cells (e.g., cell 1 to cell m) provided by one or more base stations 110. (Multiple) examples 400 may include more Figures 4A-4E The number of serving cells shown may be more or less. Multiple serving cells can be serving cells of UE 120. In some aspects, each serving cell is provided by a different base station 110. In some aspects, each serving cell is provided by the same base station 110. In some aspects, a subset of serving cells is provided by different base stations 110, and another subset of serving cells is provided by the same base station 110.

[0063] like Figure 4A As shown, multiple serving cells can be distributed across multiple cell groups. For example, as... Figure 4A As shown, cell 1 and cell 2 can be included in cell group 1, and cell 3 and cell m can be included in group 2. Other combinations and numbers of groups can be configured and / or deployed in (multiple) examples 400. In some aspects, the serving cells included in the cell group can be quasi-co-located. In some aspects, the first serving cell and the second serving cell are quasi-co-located if the attributes of the channel communicating in the first serving cell can be inferred from the attributes of the channel communicating in the second serving cell, and / or vice versa.

[0064] like Figure 4A As further shown in the figure and with reference to reference numeral 402, Example 400 provides an example in which UE120 configures a bitmap in MAC-CE to indicate beam fault information for one or more quasi-co-located serving cell groups. Figure 4B-4D Various example techniques for configuring bitmaps in MAC-CE are shown to indicate beam fault information for one or more groups of serving cells in a quasi-co-located configuration. Other configurations may be used.

[0065] like Figure 4BAs shown, in some examples, the MAC-CE may include multiple bytes or 8-bit groups. One byte of the MAC-CE may include a bitmap. Each bit in the bitmap may correspond to one of a group or more serving cell groups. Furthermore, each bit in the bitmap may indicate whether a beam failure has occurred in the associated serving cell group of one or more serving cell groups. For example, the first bit in the bitmap may indicate whether a beam failure has occurred in cell group 1 (e.g., bit CG1), the second bit in the bitmap may indicate whether a beam failure has occurred in cell group 2 (e.g., bit CG2), and so on.

[0066] The values ​​indicated by the bits in the bitmap can indicate whether an associated serving cell group has experienced a beam failure. For example, a value of 1 can indicate a beam failure for an associated serving cell, and a value of 0 can indicate no beam failure for an associated serving cell. As another example, a value of 0 can indicate a beam failure for an associated serving cell, and a value of 1 can indicate no beam failure for an associated serving cell. In some aspects, UE 120 determines that a beam failure has occurred in the serving cell group based at least in part on the detection of a beam failure on the beam of a serving cell included in the serving cell group. Since the serving cells in the serving cell group are quasi-co-located and communicate using the same beam(s), if a beam failure occurs for one of the serving cells, UE 120 can determine that the beam has failed for all serving cells in the serving cell group.

[0067] The MAC-CE may include additional bytes to indicate new beaming information for a serving cell group. Each additional byte may be associated with a corresponding serving cell group. The bytes including the bitmap may include one or more bits for a corresponding “AC” field associated with each serving cell group. The value indicated by the AC field associated with the serving cell group may indicate whether the additional bytes associated with the serving cell group include a new beaming indication for the serving cell group. For example, a value of 1 in the AC field associated with cell group 1 (e.g., CG1) may indicate that the bytes associated with cell group 1 include a new beaming indication in the field of the byte, while a value of 0 in the AC field may indicate that the bytes associated with cell group 1 do not include a new beaming indication for cell group 1. As another example, a value of 0 in the AC field associated with cell group 1 (e.g., CG1) may indicate that the bytes associated with cell group 1 include a new beaming indication in the field of the byte, while a value of 1 in the AC field may indicate that the bytes associated with cell group 1 do not include a new beaming indication for cell group 1. In this way, if the value indicated by the AC field for a byte indicates that the byte does not include a new beam indication, the base station 110 does not need to read the byte after reading the AC field, which saves processing and memory resources and reduces the latency of processing MAC-CE.

[0068] In some respects, the bytes including the bitmap also include one or more reserved bits (in... Figure 4B (indicated by "R") and / or one or more unused bits (in) Figure 4B (Indicated by "U" in the text). Reserved bits can be bits reserved for other purposes or for future use. Unused bits can be used to expand the size of the bitmap to indicate beam failures for different numbers of serving cells. In some aspects, each additional byte used to indicate new beam information may include one or more reserved bits.

[0069] like Figure 4C As shown, in some examples, the MAC-CE may include multiple bytes or 8-bit groups. One byte of the MAC-CE may include a bitmap. Each bit in the bitmap may correspond to a corresponding serving cell in multiple serving cells (e.g., bits C1 to C2). m In these cases, UE 120 can detect or determine beam faults in a serving cell group and can use a bitmap to individually indicate beam faults in serving cells included in the serving cell group. For example, UE 120 can configure the values ​​of bits associated with serving cells included in the serving cell group to indicate that a beam fault has occurred in a serving cell. Therefore, the indication of a beam fault in a serving cell within a serving cell group is an implicit indication of a beam fault in the serving cell group.

[0070] In some respects, the bytes including the bitmap also include one or more reserved bits (in... Figure 4C (indicated by "R") and / or one or more unused bits (in) Figure 4C (Indicated by "U" in the middle). Reserved bits can be bits reserved for other purposes or for future use. Unused bits can be used to expand the size of the bitmap to indicate beam faults for different numbers of serving cells.

[0071] The MAC-CE may include additional bytes to indicate new beaming information for multiple serving cells. Each additional byte may be associated with a corresponding serving cell of the multiple serving cells. Each additional byte may include an "AC" field of one or more bits. The value indicated by the AC field can indicate whether a new beam is indicated for the serving cell associated with the additional byte. For example, a value of 1 in the AC field of a byte associated with cell 1 (e.g., C1) can indicate that the byte includes a new beaming indication for cell 1 in another field, while a value of 0 in the AC field of a byte associated with cell 1 can indicate that the byte does not include a new beaming indication for cell 1. As another example, a value of 0 in the AC field of a byte associated with cell 1 (e.g., C1) can indicate that the byte includes a new beaming indication for cell 1 in another field, while a value of 1 in the AC field of a byte associated with cell 1 can indicate that the byte does not include a new beaming indication for cell 1. In this way, if the value indicated by the AC field for a byte indicates that the byte does not include a new beam indication, the base station 110 can stop reading the byte after reading the AC field. This saves processing and memory resources and reduces latency in processing MAC-CE. Each additional byte may also include one or more reserved bits.

[0072] like Figure 4D As shown, in some examples, the MAC-CE may include multiple bytes or 8-bit groups. One byte of the MAC-CE may include a bitmap. A byte including a bitmap may also include a bit (in... Figure 4D The CG bit (indicated by "CG") indicates a beam failure for one or more serving cell groups. In these cases, the value of the CG bit can indicate the serving cell group that has experienced a beam failure. For example, a value of 0 can indicate that cell group 1 has experienced a beam failure, and a value of 1 can indicate that cell group 2 has experienced a beam failure. In some aspects, the MAC-CE may include multiple CG bits to indicate serving cell groups that have experienced beam failures, in order to accommodate more configured serving cell groups.

[0073] Each bit in the bitmap can correspond to a specific serving cell in a serving cell group, with each CG bit used to indicate a beam fault. Furthermore, each bit in the bitmap can indicate whether the associated byte in the MAC-CE includes new beam information for the associated serving cell among multiple serving cells. For example, the first bit in the bitmap (e.g., bit AG1) can indicate whether the associated byte in the MAC-CE includes new beam information for cell 1, the second bit in the bitmap (e.g., bit AG2) can indicate whether the associated byte in the MAC-CE includes new beam information for cell 2, and so on. In this way, if the value indicated by the AC bit for a byte indicates that the byte does not include a new beam indication, the base station 110 does not need to read the byte after reading the AC bit, which saves processing and memory resources and reduces the latency of processing the MAC-CE.

[0074] In some respects, the bytes including the bitmap also include one or more reserved bits (in... Figure 4B (indicated by "R") and / or one or more unused bits (in) Figure 4B (Indicated by "U" in the text). Reserved bits can be bits reserved for other purposes or for future use. Unused bits can be used to expand the size of the bitmap to indicate beam failures for different numbers of serving cells. In some aspects, each additional byte used to indicate new beam information may include one or more reserved bits.

[0075] like Figure 4E As further shown, and referring to reference numeral 404, UE 120 can send the MAC-CE to at least one of one or more serving cells after configuring a bitmap in the MAC-CE. In some aspects, UE 120 sends the MAC-CE to one serving cell in each cell group (e.g., cell 1 in cell group 1 and cell 3 in cell group 3). For example, UE 120 can send the MAC-CE to the serving cell in each cell group that is configured with beam fault detection capability. As another example, UE 120 can send the MAC-CE to each serving cell included in each cell group.

[0076] A base station 110 associated with one of one or more serving cells can receive a MAC-CE and can perform one or more BFR operations based at least in part on the beam fault information included in the MAC-CE. For example, the base station 110 can configure and / or activate a new beam indicated in the MAC-CE, and can transmit downlink transmissions on the new beam indicated in the MAC-CE, etc.

[0077] In this way, UE 120 can reduce the overhead in the MAC-CE consumed by beam fault information by including beam fault information in the bitmap included in the MAC-CE. In these cases, each bit can indicate a beam fault for one or more beams of a corresponding serving cell in a quasi-co-located serving cell group, indicate a beam fault for one or more beams of a corresponding serving cell group in a quasi-co-located serving cell group, indicate whether a new beam is indicated in the MAC-CE for each cell in the serving cell group (for which a beam fault is indicated in the MAC-CE), etc.

[0078] As pointed out above, Figures 4A-4E This is provided as one or more examples. Other examples may be provided in conjunction with... Figures 4A-4E The descriptions are different.

[0079] Figure 5 This is a diagram illustrating, for example, an example process 500 performed by a UE according to various aspects of this disclosure. Example process 500 is where the UE (e.g., as described above) is... Figure 1 , 2 Examples of UE 120 (one or more of the illustrations and descriptions in 3 and / or 4A-4E) performing operations associated with the MAC-CE bitmap configured for beam fault recovery.

[0080] like Figure 5 As shown, in some aspects, processing 500 may include configuring a bitmap in the MAC-CE to indicate beam fault information for one or more serving cells or one or more groups of serving cells (block 510). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may configure a bitmap in the MAC-CE to indicate beam fault information for one or more serving cells or one or more groups of serving cells, as described above.

[0081] like Figure 5 As further shown, in some aspects, processing 500 may include transmitting MAC-CE to a base station via at least one serving cell (block 520). For example, a UE (e.g., using a receive processor 258, a transmit processor 264, a controller / processor 280, a memory 282, etc.) may transmit MAC-CE to a base station via at least one serving cell, as described above.

[0082] Processing 500 may include additional aspects, such as any single aspect or any combination of aspects as described below and / or related to one or more other processes described elsewhere herein.

[0083] In a first aspect, the configuration bitmap includes each bit from at least a subset of the bits included in the configuration bitmap to indicate whether a beam failure of one or more beams has occurred in an associated serving cell of one or more serving cells, and the one or more serving cells are configured with beam failure detection capability. In a second aspect, alone or in combination with the first aspect, another subset of the bitmap includes one or more unused bits. In a third aspect, alone or in combination with one or more of the first and second aspects, the bitmap is included together with one or more reserved bits in a byte of the MAC-CE. In a fourth aspect, alone or in combination with one or more of the first to third aspects, processing 500 includes configuring one or more bytes in the MAC-CE associated with one or more serving cells, wherein one byte of the one or more bytes is associated with a serving cell of the one or more serving cells, including: a first field indicating whether the byte includes an indication of a new beam for the serving cell, and a second field including the indication of a new beam.

[0084] In the fifth aspect, individually or in combination with one or more of the first to fourth aspects, the configuration bitmap includes each bit from at least a subset of the bits included in the configuration bitmap to indicate whether a beam failure of one or more beams has occurred in at least a subset of one or more serving cell groups, wherein the serving cells within each group are quasi-co-located. In the sixth aspect, individually or in combination with one or more of the first to fifth aspects, another subset of the bitmap includes one or more unused bits. In the seventh aspect, individually or in combination with one or more of the first to sixth aspects, the bitmap is included together with one or more reserved bits in a byte of the MAC-CE. In the eighth aspect, individually or in combination with one or more of the first to seventh aspects, the bitmap is included together with one or more new beam indicator bits in a byte of the MAC-CE, and each of the one or more new beam indicator bits indicates whether the associated byte in the MAC-CE includes an indication of a new beam for the associated serving cell group.

[0085] In the ninth aspect, individually or in combination with one or more of the first to eighth aspects, the configuration bitmap includes: each bit in at least a subset of the bits included in the configuration bitmap to indicate that a beam failure of one or more beams has occurred in a corresponding serving cell of one of the one or more serving cell groups, wherein the serving cells in each group are quasi-co-located. In the tenth aspect, individually or in combination with one or more of the first to ninth aspects, processing 500 includes configuring each of one or more bytes in the MAC-CE to indicate the same new beam for the associated serving cell in the serving cell group. In the eleventh aspect, individually or in combination with one or more of the first to tenth aspects, the bitmap is included in a byte having one or more other bits indicating a beam failure for one of the one or more serving cell groups, and each bit in the bitmap indicating whether a new beam is indicated for the associated serving cell in the serving cell group, wherein the serving cells in each group are quasi-co-located.

[0086] although Figure 5 The example box for handling 500 is shown, but in some respects, handling 500 can include additional boxes, fewer boxes, different boxes, or different... Figure 5 The boxes depicted in the text are arranged in different ways. Additionally or alternatively, two or more boxes can be processed in parallel, up to 500.

[0087] Figure 6 This is a conceptual data flow diagram 600 illustrating the data flow between different components in the illustrated example device 602. Device 602 can be a UE (e.g., the one described above in conjunction with...). Figure 1 , 2 (UE 120 illustrated and described in one or more of 3 and / or 4A-4E). In some aspects, apparatus 602 includes configuration component 604 and transmission component 606.

[0088] In some aspects, configuration component 604 configures a bitmap in MAC-CE 608 to indicate beam fault information for one or more serving cells or a group or more groups of serving cells configured with beam fault detection capability. In some aspects, the serving cells within each group are quasi-co-located. In some aspects, the base station 650 (e.g., in conjunction with the above) Figure 1 , 2 One or more of the illustrated and described base stations 110 (3 and / or 4A-4E) provide one or more serving cells or serving cells in each group. In some aspects, the transmission component 606 transmits MAC-CE 608 to at least one serving cell.

[0089] In some aspects, configuration component 604 includes a receive processor (e.g., receive processor 258), a transmit processor (e.g., transmit processor 264), a controller / processor (e.g., controller / processor 280), a memory (e.g., memory 282), etc. In some aspects, transmission component 606 includes an antenna 252, MOD 254, a transmit processor (e.g., transmit processor 264), a TX MIMO processor (e.g., TX MIMO processor 266), a controller / processor (e.g., controller / processor 280), a memory (e.g., memory 282), etc.

[0090] Device 602 may include execution Figure 5 Additional components for each box of the aforementioned processing algorithm, such as 500. Figure 5 Each of the aforementioned processing steps 500, etc., can be executed by a component, and the apparatus can include one or more of these components. These components can be one or more hardware components specifically configured to execute the processing / algorithm, implemented by a processor configured to execute the processing / algorithm, stored in a computer-readable medium for processor implementation, or some combination thereof.

[0091] Figure 6 The number and arrangement of components shown are provided as an example. In reality, with... Figure 6 Compared to the components shown, there may be additional components, fewer components, different components, or components with different arrangements. Furthermore, Figure 6 The two or more components shown can be implemented within a single component, or Figure 6 The single component shown can be implemented as multiple, distributed components. Additionally or alternatively, Figure 6 The set (one or more components) shown can perform what is described as being made by Figure 6 The set of components shown performs one or more functions.

[0092] The foregoing disclosure provides illustrations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations can be made based on the foregoing disclosure, or from practice in the various aspects.

[0093] 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 a combination of hardware, firmware, and / or hardware and software.

[0094] As used in this article, depending on the context, a threshold can refer to a value that is greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0095] It will be apparent that the systems and / or methods described herein can be implemented in various forms of hardware, firmware, and / or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods is not limiting in these respects. Therefore, the operation and behavior of the systems and / or methods are described herein without reference to any specific software code—it should be understood that software and hardware can be designed to implement the systems and / or methods, at least in part, based on the description herein.

[0096] Although specific combinations of features are recited in the claims and / or disclosed in the description, these combinations are not intended to limit the disclosure of aspects. In fact, many of these features can be combined in ways not specifically recited in the claims and / or not specifically disclosed in the description. Although each dependent claim listed below may be directly dependent on only one claim, the disclosure of aspects includes each dependent claim combined with each other claim in this set of claims. The phrase “at least one” in the list of items refers to any combination of those items that include a single member. As an 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 having multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0097] Unless explicitly stated otherwise, no element, action, or instruction used herein should be construed as critical or necessary. Additionally, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more.” 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.” Where only one item is referred to, the phrase “only one” or similar language is used. Additionally, as used herein, the terms “has,” “have,” “having,” etc., are intended to be open-ended terms. Furthermore, unless explicitly stated otherwise, the phrase “based on” is intended to mean “at least partially based on.”

Claims

1. A method of wireless communication performed by a user equipment (UE), comprising: generating a bitmap in a medium access control control element (MAC-CE) to indicate beam failure information for one or more groups of serving cells; and transmitting, to a base station, the MAC-CE via at least one serving cell.

2. The method of claim 1, wherein configuring the bitmap comprises: configuring each of at least one subset of bits included in the bitmap to indicate whether a beam failure of one or more beams has occurred in at least one subset of one or more groups of serving cells, where serving cells within each group are quasi co-located.

3. The method of claim 2, wherein another subset of the bitmap includes one or more unused bits.

4. The method of claim 2, wherein the bitmap is included with one or more reserved bits in a byte in the MAC-CE.

5. The method of claim 2, wherein the bitmap is included with one or more new beam indicator bits in a byte in the MAC-CE; and where each of the one or more new beam indicator bits indicates whether an associated byte in the MAC-CE includes an indication of a new beam for an associated group of serving cells.

6. The method of claim 1, wherein configuring the bitmap comprises: configuring each of at least one subset of bits included in the bitmap to indicate a beam failure of one or more beams occurred for a respective serving cell of one group of the one or more groups of serving cells, where serving cells within each group are quasi co-located.

7. The method of claim 6, further comprising: configuring each of one or more bytes in the MAC-CE to indicate a same new beam for an associated serving cell of the group of serving cells.

8. The method of claim 1, wherein the bitmap is included in one byte, the byte having one or more other bits indicating the beam failure for one group of the one or more groups of serving cells; where each bit in the bitmap indicates whether a new beam is indicated for an associated serving cell in the group of serving cells; and where serving cells within each group are quasi co-located.

9. A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors coupled to the memory and configured to: generate a bitmap in a medium access control control element (MAC-CE) to indicate beam failure information for one or more groups of serving cells; and transmit, to a base station, the MAC-CE via at least one serving cell.

10. The UE of claim 9, wherein the one or more processors, when configuring the bitmap, are configured to: configure each of at least one subset of bits included in the bitmap to indicate whether a beam failure of one or more beams has occurred in at least one subset of one or more groups of serving cells, where serving cells within each group are quasi co-located. ​ 11. The UE of claim 10, wherein another subset of the bitmap comprises one or more unused bits.

12. The UE of claim 10, wherein the bitmap is included with one or more reserved bits in a byte in the MAC-CE.

13. The UE of claim 10, wherein the bitmap is included with one or more new beam indicator bits in a byte in the MAC-CE; and wherein each of the one or more new beam indicator bits indicates whether an associated byte in the MAC-CE includes an indication of a new beam for an associated serving cell group.

14. The UE of claim 9, wherein the one or more processors, when configuring the bitmap, are configured to: configure each bit in at least one subset of bits included in the bitmap to indicate that a beam failure of one or more beams occurred for a respective serving cell of one serving cell group of the one or more serving cell groups, where serving cells within each group are quasi co-located.

15. The UE of claim 14, wherein the one or more processors are further configured to: configure each of one or more bytes in the MAC-CE to indicate a same new beam for an associated serving cell in the serving cell group.

16. The UE of claim 9, wherein the bitmap is included in one byte, the byte having one or more other bits indicating the beam failure for one serving cell group of the one or more serving cell groups; and wherein each bit in the bitmap indicates whether a new beam is indicated for an associated serving cell in the serving cell group; and wherein serving cells within each group are quasi co-located.

17. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising: one or more instructions that, when executed by one or more processors of a user equipment (UE), are to cause the one or more processors to: generate a bitmap in a medium access control control element (MAC-CE) to indicate beam failure information for one or more serving cell groups; and transmit the MAC-CE to a base station via at least one serving cell.

18. An apparatus for wireless communication, comprising: means for generating a bitmap in a medium access control control element (MAC-CE) to indicate beam failure information for one or more serving cell groups; and means for transmitting the MAC-CE to a base station via at least one serving cell.

19. A computer program product comprising computer readable instructions for execution by a processor to cause the processor to perform the method of any of claims 1-8. ​ ​ ​ ​

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