Beam selection for communications in multiple transmit-receive point deployments

Abstract

In general, various aspects of the present disclosure relate to wireless communications. In some aspects, a user equipment (UE) may determine a beam set associated with a transmit-receive point (TRP) set based at least in part on a downlink control information (DCI) configuration, a transmission configuration indicator (TCI) code point mapping, a control resource set (CORESET) configuration, or at least one of a TRP index, for which a corresponding uplink beam indication is not configured, wherein the beam set includes a sounding reference signal (SRS) beam or a physical uplink control channel (PUCCH) beam. The UE may communicate with the TRP set using the beam set based at least in part on determining the beam set. A number of other aspects are provided.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 62 / 910,807, filed on October 4, 2019, entitled “BEAM SELECTION FOR COMMUNICATION IN A MULTI-TRANSMIT-RECEIVE POINT DEPLOYMENT,” and U.S. Non-Provisional Patent Application No. 16 / 948,228, filed on September 9, 2020, entitled “BEAM SELECTION FOR COMMUNICATION IN A MULTI-TRANSMIT-RECEIVE POINT DEPLOYMENT,” which are hereby expressly incorporated herein by reference. Technical Field

[0003] Generally speaking, aspects of the present disclosure relate to wireless communications and to techniques and apparatus for beam selection for communications in multiple transmit-receive point deployments. Background Art

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may utilize multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the 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 (BS) that can support communications for multiple user equipments (UEs). A UE may communicate with a base station (BS) via a downlink and an uplink. A downlink (or forward link) refers to a communication link from a BS to a UE, while an uplink (or reverse link) refers to a communication link from a UE to a 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.

[0006] The above-mentioned multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate at the city, country, region, and even global level. New Radio (NR) (which may also be referred to as 5G) is a set of enhancements to the LTE mobile standard released by the Third Generation Partnership Project (3GPP). NR is designed to better integrate with other open standards using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with a cyclic prefix (CP) on the downlink (DL), CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), and support 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 increase, there is a need for further improvements in LTE and NR technologies. Preferably, these improvements should be applicable to other multiple access technologies and telecommunication standards using these technologies. Summary of the invention

[0007] In some aspects, a method of wireless communication performed by a user equipment (UE) may include: determining a beam set associated with a TRP set based at least in part on a downlink control information (DCI) configuration, a transmission configuration indicator (TCI) code point mapping, a control resource set (CORESET) configuration, or at least one of a transmit-receive point (TRP) index, for which a corresponding uplink beam indication is not configured, wherein the beam set includes a sounding reference signal (SRS) beam or a physical uplink control channel (PUCCH) beam; and communicating with the TRP set using the beam set based at least in part on determining the beam set.

[0008] 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: determine a beam set associated with a TRP set based at least in part on at least one of a DCI configuration, a TCI code point mapping, a CORESET configuration, or a TRP index, for which a corresponding uplink beam indication is not configured, wherein the beam set includes an SRS beam or a PUCCH beam; and communicate with the TRP set using the beam set based at least in part on determining the beam set.

[0009] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to: determine a beam set associated with a TRP set, for which a corresponding uplink beam indication is not configured, based at least in part on a DCI configuration, a TCI code point mapping, a CORESET configuration, or a TRP index, wherein the beam set includes an SRS beam or a PUCCH beam; and communicate with the TRP set using the beam set based at least in part on determining the beam set.

[0010] In some aspects, an apparatus for wireless communication may include: a unit for determining a beam set associated with a TRP set based at least in part on at least one of a DCI configuration, a TCI code point mapping, a CORESET configuration, or a TRP index, for which a corresponding uplink beam indication is not configured, wherein the beam set includes an SRS beam or a PUCCH beam; and a unit for communicating with the TRP set using the beam set based at least in part on determining the beam set.

[0011] Aspects generally include methods, apparatuses, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as generally described herein with reference to and as illustrated by the figures and description.

[0012] In order that the detailed description that follows may be better understood, the foregoing has been fairly extensively summarized in accordance with the features and technical advantages of examples of the present disclosure. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples may be readily used as a basis for modifying or designing other structures for the same purpose of achieving the present disclosure. Such equivalent structures do not depart from the scope of the appended claims. When considered in conjunction with the accompanying drawings, the characteristics of the concepts disclosed herein (both their organization and methods of operation) and the associated advantages will be better understood from the following description. Each of the drawings is provided for the purpose of illustration and description and is not intended to be a definition of limitations on the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to be able to understand the above features of the present disclosure in detail, a more specific description of the above brief summary can be made by reference to various aspects, some of which are shown in the accompanying drawings. However, it should be noted that the accompanying drawings only show certain typical aspects of the present disclosure and should not be considered as limiting its scope, because the description may allow other equivalent aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0014] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0015] Figure 2 is a block diagram conceptually illustrating an example of a base station communicating with a UE in a wireless communication network according to various aspects of the present disclosure.

[0016] Figure 3A is a block diagram conceptually illustrating an example of a frame structure in a wireless communication network in accordance with various aspects of the present disclosure.

[0017] Figure 3B is a block diagram conceptually illustrating an example synchronization communication hierarchy in a wireless communication network in accordance with various aspects of the present disclosure.

[0018] Figure 4 is a block diagram conceptually illustrating an example slot format with a normal cyclic prefix in accordance with various aspects of the present disclosure.

[0019] Figure 5

[0013] An example logical architecture of a distributed radio access network (RAN) is shown in accordance with various aspects of the present disclosure.

[0020] Figure 6 Example physical architectures of distributed RANs are shown in accordance with various aspects of the present disclosure.

[0021] Figure 7 is a schematic diagram illustrating an example of beam selection for communications in a multiple transmit-receive point deployment according to various aspects of the present disclosure.

[0022] Figure 8 is a schematic diagram illustrating an example process performed, for example, by a user device, according to various aspects of the present disclosure. DETAILED DESCRIPTION

[0023] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be embodied in a variety of different forms and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. More specifically, these aspects are provided so that the present disclosure will be thorough and complete, and the scope of the present disclosure will be fully conveyed to those skilled in the art. At least partially based on the teachings of this article, it should be understood by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the disclosure disclosed herein, regardless of whether it is implemented independently of any other aspect of the present disclosure or combined with any other aspect of the present disclosure to achieve. For example, using any number of aspects set forth herein, a device can be implemented or a method can be implemented. In addition, the scope of the present disclosure is intended to cover such a device or method implemented using other structures, functions, or structures and functions other than the various aspects of the disclosure set forth herein or different from the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein can be embodied by one or more elements of the claims.

[0024] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements") and illustrated in the accompanying drawings. These elements can be implemented using hardware, software, or a 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.

[0025] It should be noted that although various aspects may be described herein using terms typically associated with 3G and / or 4G wireless technologies, various aspects of the present disclosure may be applied to communication systems based on other generations (such as 5G and later versions), including NR technology.

[0026] Figure 1 1 is a schematic diagram showing a wireless network 100 in which various aspects of the present disclosure may be implemented. The wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network. The wireless network 100 may include a plurality of BSs 110 (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, NR BS, Node B, gNB, 5G Node B (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 a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0027] 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 subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. 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 in , BS 110a may be a macro BS of macro cell 102a, BS 110b may be a pico BS of pico cell 102b, and BS 110c may be a femto BS of femto cell 102c. A BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5G NB", and "cell" may be used interchangeably herein.

[0028] In some aspects, 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 aspects, the BSs may be interconnected to each other and / or one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces, such as direct physical connections, virtual networks, and / or similar interfaces using any suitable transport network.

[0029] 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 send 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 in FIG. 1 , a relay station 110 d may communicate with a macro BS 110 a and a UE 120 d to facilitate communication between the BS 110 a and the UE 120 d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0030] 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 effects 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).

[0031] 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.

[0032] UE 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be stationary or mobile. UE can also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE can be a cellular phone (e.g., a smart phone), 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 biometric sensor / device, a wearable device (smart watch, 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 a satellite radio unit), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing device, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0033] Some UEs may be considered as 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. A wireless node may provide, for example, a connection to a network 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 as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as 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.).

[0034] 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, NR or 5G RAT networks can be deployed.

[0035] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more sidelink channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocol (e.g., which may include vehicle-to-vehicle (V2V) protocol, vehicle-to-infrastructure (V2I) protocol, etc.), mesh network, etc. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as performed by base station 110.

[0036] As noted above, providing Figure 1 As an example. Other examples may be different from the Figure 1 The content described.

[0037] Figure 2 A block diagram of a design 200 of a base station 110 and a UE 120 is shown, which may be Figure 1 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.

[0038] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the 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), etc.) 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., cell-specific reference signals (CRS)) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (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 (MOD) 232a to 232t. Each modulator 232 can process the 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. According to various aspects described in more detail below, position coding can be used to generate synchronization signals to transmit additional information.

[0039] At UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 258 may 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 and system information to a controller / processor 280. The channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 120 may be included in a housing.

[0040] 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 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 antenna 234, processed by the demodulator 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 decoded data to a data sink 239 and decoded control information to a controller / processor 240. The base station 110 may include a communication unit 244 and transmit to 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.

[0041] As described in more detail elsewhere herein, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2Any other component of the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component may perform or direct e.g. Figure 8 The operations of process 800 and / or other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. 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, one or more instructions, when executed by one or more processors of base station 110 and / or UE 120, may perform or direct, for example, Figure 8 The scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink.

[0042] In some aspects, the UE 120 may include: a unit for determining a beam set associated with a TRP set based at least in part on a downlink control information (DCI) configuration, a transmission configuration indicator (TCI) code point mapping, a control resource set (CORESET) configuration, or a transmit-receive point (TRP) index, for which a corresponding uplink beam indication is not configured; a unit for communicating with the TRP set using the beam set based at least in part on determining the beam set, etc. In some aspects, such a unit may include a unit for combining Figure 2 One or more components of UE 120 are depicted, 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.

[0043] As noted above, providing Figure 2 As an example. Other examples may be different from the Figure 2 The content of the description.

[0044] Figure 3AAn example frame structure 300 for frequency division duplex (FDD) in a telecommunication system (e.g., NR) is shown. The transmission timeline for each of the downlink and uplink may be divided into units of radio frames (sometimes referred to as frames). Each radio frame may have a predetermined duration (e.g., 10 milliseconds (ms)) and may be divided into a set of Z (Z ≥ 1) subframes (e.g., with indices from 0 to Z-1). Each subframe may have a predetermined duration (e.g., 1 ms) and may include a set of time slots (e.g., in Figure 3A Each subframe 2 is shown in m time slots, where m is the number scheme used for transmission, such as 0, 1, 2, 3, 4, etc.). Each time slot may include a set of L symbol periods. For example, each time slot may include fourteen symbol periods (e.g., Figure 3A ), seven symbol periods, or another number of symbol periods. In the case where a subframe includes two slots (e.g., when m=1), the subframe may include 2L symbol periods, where the 2L symbol periods in each subframe may be assigned indices from 0 to 2L-1. In some aspects, the scheduling unit for FDD may be frame-based, subframe-based, slot-based, symbol-based, etc.

[0045] Although some techniques are described herein in conjunction with frames, subframes, time slots, etc., these techniques may also be applied to other types of wireless communication structures, which may be referred to using terms other than "frames," "subframes," "time slots," etc. in 5G NR. In some aspects, a wireless communication structure may refer to a periodic, time-limited communication unit defined by a wireless communication standard and / or protocol. Additionally or alternatively, a wireless communication structure may be referred to using terms other than "frames," "subframes," "time slots," etc. Figure 3A The wireless communication structure configurations are different from those shown in FIG.

[0046] In some telecommunications (e.g., NR), a base station may send synchronization signals. For example, a base station may send a primary synchronization signal (PSS), a secondary synchronization signal (SSS), etc. on the downlink of each cell supported by the base station. The PSS and SSS may be used by the UE for cell search and acquisition. For example, the UE may use the PSS to determine symbol timing, and the UE may use the SSS to determine the physical cell identifier associated with the base station and the frame timing. The base station may also send a physical broadcast channel (PBCH). The PBCH may carry some system information, such as system information that supports initial access of the UE.

[0047] In some aspects, a base station may send a PSS, SSS, and / or PBCH according to a synchronization communication level (e.g., a synchronization signal (SS) level) including multiple synchronization communications (e.g., SS blocks), as described below in conjunction with Figure 3B Described.

[0048] Figure 3B is a block diagram conceptually illustrating an example SS hierarchy, which is an example of a synchronous communication hierarchy. Figure 3B As shown in , the SS level may include an SS burst set, which may include multiple SS bursts (identified as SS burst 0 to SS burst B-1, where B is the maximum number of repetitions of the SS burst that can be sent by the base station). As further shown, each SS burst may include one or more SS blocks (identified as SS block 0 to SS block (b max_SS -1), where b max_SS -1 is the maximum number of SS blocks that can be carried by an SS burst). In some aspects, different SS blocks may be beamformed in different ways. Figure 3B As shown in , a SS burst set may be sent periodically (such as every X milliseconds) by a wireless node. In some aspects, a SS burst set may have a fixed or dynamic length. Figure 3B is shown as Y milliseconds.

[0049] Figure 3B The SS burst sets shown in are examples of synchronous communication sets, and other synchronous communication sets may be used in conjunction with the techniques described herein. Figure 3B The SS blocks shown in are examples of synchronous communications, and other synchronous communications may be used in conjunction with the techniques described herein.

[0050] In some aspects, an SS block includes resources that carry PSS, SSS, PBCH, and / or other synchronization signals (e.g., a third synchronization signal (TSS)) and / or synchronization channels. In some aspects, multiple SS blocks are included in an SS burst, and the PSS, SSS, and / or PBCH may be the same on each SS block of the SS burst. In some aspects, a single SS block may be included in an SS burst. In some aspects, the length of an SS block may be at least four symbol periods, wherein each symbol carries one or more of a PSS (e.g., occupying one symbol), a SSS (e.g., occupying one symbol), and / or a PBCH (e.g., occupying two symbols).

[0051] In some aspects, such as Figure 3B As shown in , the symbols of the SS blocks are continuous. In some aspects, the symbols of the SS blocks are non-continuous. Similarly, in some aspects, one or more SS blocks of an SS burst may be sent in continuous radio resources (e.g., continuous symbol periods) during one or more time slots. Additionally or alternatively, one or more SS blocks of an SS burst may be sent in non-continuous radio resources.

[0052] In some aspects, an SS burst may have a burst period, whereby the base station transmits an SS block of the SS burst according to the burst period. In other words, the SS block may be repeated during each SS burst. In some aspects, an SS burst set may have a burst set period, whereby the SS bursts in the SS burst set are transmitted by the base station according to a fixed burst set period. In other words, the SS burst may be repeated during each SS burst set.

[0053] The base station may send system information such as system information blocks (SIBs) on a physical downlink shared channel (PDSCH) in certain time slots. The base station may send control information / data on a physical downlink control channel (PDCCH) in C symbol periods of a time slot, where B may be configurable for each time slot. The base station may send traffic data and / or other data on the PDSCH in the remaining symbol periods of each time slot.

[0054] As noted above, providing Figure 3A and Figure 3B As an example. Other examples may be different from the Figure 3A and Figure 3B The content of the description.

[0055] Figure 4 An example slot format 410 with a conventional cyclic prefix is ​​shown. The available time-frequency resources may be divided into resource blocks. Each resource block may cover a set of subcarriers (e.g., 12 subcarriers) in a slot and may include multiple resource elements. Each resource element may cover one subcarrier in a symbol period (e.g., in time) and may be used to send one modulation symbol, which may be real or complex valued.

[0056] The interleaving structure may be used for each of the downlink and uplink of FDD in certain telecommunication systems (e.g., NR). For example, Q interleavings with indices from 0 to Q–1 may be defined, where Q may be equal to 4, 6, 8, 10, or some other value. Each interleaving may include time slots spaced apart by Q frames. Specifically, interleaving q may include time slots q, q+Q, q+2Q, etc., where q∈{0,…,Q–1}.

[0057] A UE may be located within the coverage of multiple BSs. One of these BSs may be selected to serve the UE. The serving BS may be selected based at least in part on various criteria such as received signal strength, received signal quality, path loss, etc. The received signal quality may be quantified by a signal to noise plus interference ratio (SNIR) or a reference signal received quality (RSRQ) or some other metric. The UE may operate in a significant interference scenario, in which the UE may observe high interference from one or more interfering BSs.

[0058] Although aspects of the examples described herein may be associated with NR or 5G technology, aspects of the present disclosure may be applicable to other wireless communication systems. A new radio (NR) may refer to a radio configured to operate according to a new air interface (e.g., different from an air interface based on orthogonal frequency division multiple access (OFDMA)) or a fixed transport layer (e.g., different from the Internet Protocol (IP)). In various aspects, NR may use OFDM with CP (referred to herein as cyclic prefix OFDM or CP-OFDM) and / or SC-FDM on the uplink, may use CP-OFDM on the downlink, and include support for half-duplex operation using time division duplex (TDD). In various aspects, NR may, for example, use OFDM with CP (referred to herein as CP-OFDM) and / or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) on the uplink, may use CP-OFDM on the downlink, and include support for half-duplex operation using TDD. NR may include enhanced mobile broadband (eMBB) services targeting wide bandwidth (e.g., 80 megahertz (MHz) and above), millimeter wave (mmW) targeting high carrier frequencies (e.g., 60 gigahertz (GHz)), massive MTC (mMTC) targeting non-backward compatible MTC technologies, and / or mission critical services targeting ultra-reliable low latency communications (URLLC) services.

[0059] In some aspects, a single component carrier bandwidth of 100 MHz may be supported. NR resource blocks may span 12 subcarriers over a duration of 0.1 ms, with a subcarrier bandwidth of 60 or 120 kilohertz (kHz). Each radio frame may include 40 slots and may have a length of 10 ms. Thus, each slot may have a length of 0.25 ms. Each slot may indicate a link direction (e.g., DL or UL) for data transmission, and the link direction of each slot may be switched dynamically. Each slot may include DL / UL data and DL / UL control data.

[0060] Beamforming may be supported and the beam direction may be dynamically configured. MIMO transmission with precoding may also be supported. MIMO configuration in DL may support up to 8 transmit antennas, with multi-layer DL transmission of up to 8 streams and up to 2 streams per UE. Multi-layer transmission of up to 2 streams per UE may be supported. Aggregation of multiple cells of up to 8 serving cells may be supported. Alternatively, NR may support an air interface other than an OFDM-based interface. An NR network may include entities such as a central unit and / or a distributed unit.

[0061] As noted above, providing Figure 4As an example. Other examples may be different from the Figure 4 The content of the description.

[0062] Figure 5 An example logical architecture of a distributed RAN 500 is shown according to aspects of the present disclosure. A 5G access node 506 may include an access node controller (ANC) 502. The ANC may be a central unit (CU) of the distributed RAN 500. The backhaul interface to the next generation core network (NG-CN) 504 may terminate at the ANC. The backhaul interface to the adjacent next generation access node (NG-AN) may terminate at the ANC. The ANC may include one or more TRPs 508 (which may also be referred to as BS, NR BS, Node B, 5G NB, AP, gNB or some other term). As described above, "TRP" may be used interchangeably with "cell".

[0063] The TRP 508 may be a distributed unit (DU). The TRP may be connected to one ANC (ANC 502) or more than one ANC (not shown). For example, for RAN sharing, Radio as a Service (RaaS), and service-specific AND deployments, the TRP may be connected to more than one ANC. The TRP may include one or more antenna ports. The TRP may be configured to provide services to the UE individually (e.g., dynamically selected) or jointly (e.g., joint transmission).

[0064] The local architecture of RAN 500 can be used to illustrate fronthaul communications. The architecture can be defined to support fronthaul solutions across different deployment types. For example, the architecture can be based at least in part on the sending network capabilities (e.g., bandwidth, latency, and / or jitter).

[0065] The architecture may share features and / or components with LTE. According to some aspects, the next generation AN (NG-AN) 510 may support dual connectivity with NR. The NG-AN may share a common fronthaul for LTE and NR.

[0066] The architecture may enable collaboration between and among TRPs 508. For example, collaboration may be provisioned within a TRP and / or across TRPs via ANC 502. According to various aspects, an inter-TRP interface may not be required / existent.

[0067] According to various aspects, there may be a dynamic configuration of split logical functions within the architecture of the RAN 500. Packet Data Convergence Protocol (PDCP), Radio Link Control (RLC), or Medium Access Control (MAC) protocols may be adaptively placed at the ANC or TRP.

[0068] According to various aspects, a BS may include a central unit (CU) (eg, ANC 502) and / or one or more distributed units (eg, one or more TRPs 508).

[0069] As noted above, providing Figure 5 As an example. Other examples may be different from the Figure 5 The content of the description.

[0070] Figure 6 An example physical architecture of a distributed RAN 600 is shown according to aspects of the present disclosure. A centralized core network unit (C-CU) 602 may host core network functions. The C-CU may be centrally deployed. To handle peak capacity, C-CU functions may be offloaded (e.g., to Advanced Wireless Services (AWS)).

[0071] A centralized RAN unit (C-RU) 604 may host one or more ANC functions. Optionally, the C-RU may host core network functions locally. The C-RU may have a distributed deployment. The C-RU may be closer to the network edge.

[0072] A distributed unit (DU) 606 may host one or more TRPs. A DU may be located at the edge of the network with radio frequency (RF) capabilities.

[0073] As noted above, providing Figure 6 As an example. Other examples may be different from the Figure 6 The content of the description.

[0074] In some communication systems, a UE may communicate with multiple TRPs (e.g., multiple BSs). For example, the UE may be deployed in a multi-TRP (mTRP) deployment that enables the UE to communicate with multiple TRPs on multiple links. In some cases, at least one of the TRPs may provide configuration information to identify the corresponding uplink beam indicator (spatial relationship or transmission configuration indicator (TCI) state) of the beam used by the UE. In such a case, the UE may use the spatial relationship to determine the beam (e.g., a default beam) to use when sending SRS or PUCCH on a sounding reference signal (SRS) resource or a physical uplink control channel (PUCCH) resource, respectively. However, in some cases, the UE may not receive configuration information identifying the spatial relationship.

[0075] Some aspects described herein implement beam selection for communications in mTRP deployments. For example, the UE may determine mTRP transmission scenarios, such as the number of configured downlink control information (DCI) messages, whether SRS resources or PUCCH resources are associated with TRP indexes, whether TCI code point mapping is defined, whether high-layer TRP indexes are configured on a per-CORESET basis, and the like. In this case, based at least in part on the mTRP transmission scenario and / or the stored information, the UE may determine the beam to use for communication and may, for example, send SRS and / or PUCCH. In this way, the UE may communicate with one or more of a plurality of TRPs when a corresponding uplink beam indication is not configured for a beam used by the UE.

[0076] Figure 7 is a schematic diagram illustrating an example 700 of beam selection for communications in an mTRP deployment in accordance with various aspects of the present disclosure. Figure 7 As shown in FIG. 7 , example 700 includes a first BS 110 (eg, a first TRP, TRP A ) and a second BS 110 (eg, a second TRP, TRP B )UE 120 communicating with each other.

[0077] like Figure 7In and further shown by reference numeral 710, UE 120 may determine an mTRP transmission scenario. For example, UE 120 may determine whether UE 120 is operating in a single downlink control information (DCI) scenario with multiple TRPs. In this case, UE 120 may determine that UE 120 is operating in a single DCI scenario based at least in part on whether a TCI code point is mapped to multiple TCI states. Additionally or alternatively, UE 120 may determine whether an SRS resource or a PUCCH resource on which UE 120 will send an SRS or a PUCCH, respectively, is associated with a TRP index. In this case, UE 120 may determine whether an SRS resource or a PUCCH resource is associated with a TRP index based at least in part on whether UE 120 receives signaling from BS 110 that explicitly configures the TRP index on a per-SRS or per-PUCCH resource basis. Additionally or alternatively, UE 120 may determine a configured TRP index for an SRS resource or a PUCCH resource based at least in part on a TRP index of a scheduling CORESET. In some aspects, UE 120 may determine whether UE 120 is operating in a multi-DCI scenario with multiple TRPs. For example, UE 120 may determine that a first high-layer TRP index is configured for a first CORESET and is different from a second high-layer TRP index configured for a second CORESET in a PDCCH configuration message. In some aspects, UE 120 may determine that UE 120 is operating neither in a single-DCI scenario nor in a multi-DCI scenario with SRS or PUCCH resources associated with the TRP index.

[0078] like Figure 7 , and as further shown by reference numeral 720, the UE 120 may determine a beam for SRS and / or PUCCH transmission. For example, the UE 120 may determine a beam for transmission to the first BS 110, a beam for transmission to the second BS 110, etc. In some aspects, the UE 120 may determine the beam for transmission based at least in part on the transmission scenario and the stored configuration. For example, when the UE 120 operates in a single DCI scenario with an SRS resource or a PUCCH resource associated with a TRP index, the UE 120 may determine that one or more TCI code points are mapped to a pair of TCI states (e.g., for a set of 8 code points, 4 code points may be mapped to a single TCI state and 4 code points may be mapped to a pair of TCI states). In this case, for a TCI state having a specific value (e.g., the lowest value) of the TCI state identifier, the UE 120 may select a first value corresponding to a first beam for the first BS 110 and a second value corresponding to a second beam for the second BS 110.

[0079] Additionally or alternatively, in a multi-DCI scenario, the UE 120 may select a beam associated with a TCI state of a CORESET having the same index value as the TRP. For example, for the first BS 110, the UE 120 may select a beam associated with a TCI state of a CORESET having the same index value as the TRP. A The first beam corresponding to the TCI state of the first CORESET with the same index value, and for the second BS 110, a first beam corresponding to the TCI state of the first CORESET with the same index value may be selected. B In another embodiment, UE 120 may select a beam for receiving PDSCH from BS 110 for SRS or PUCCH transmission to BS 110 based at least in part on a scheduling offset between the scheduled PDCCH and the PDSCH being less than a beam switching delay threshold. In another embodiment, UE 120 may select a beam for receiving PDSCH from BS 110 for SRS or PUCCH transmission to BS 110 based at least in part on a TCI state and a beam for PDSCH from BS 110 or for PDSCH with the same TRP index as the TRP of BS 110 (e.g., the same TRP or another TRP with the same TRP index as the TRP).

[0080] In some aspects, when the UE 120 is not operating in a single DCI scenario or a multi-DCI scenario with an SRS resource or a PUCCH resource associated with a TRP index, the UE 120 may select a beam based at least in part on a default TCI state, a quasi co-location (QCL) assumption, an active TCI state, a reference signal, a medium access control (MAC) control element (CE) (MAC-CE), etc. For example, the UE 120 may select a beam for the BS 110 based at least in part on a stored default TCI state or a stored default QCL assumption of a PDSCH in a recent slot and / or associated with a lowest CORESET identifier. Additionally or alternatively, the UE 120 may determine a beam for the BS 110 based at least in part on an active TCI state of a CORESET associated with the BS 110. Additionally or alternatively, the UE 120 may determine a beam for the BS 110 (e.g., a first BS 110) based at least in part on a TCI state of a scheduling PDCCH for an aperiodic SRS or PUCCH. In this case, the UE 120 may determine another beam for another BS 110 (eg, a second BS 110) based at least in part on a default TCI state or a default QCL assumption for a PDSCH that is not used for aperiodic SRS or PUCCH.

[0081] Additionally or alternatively, UE 120 may determine a beam for the BS based at least in part on a QCL assumption for a particular CORESET (e.g., a CORESET with a lowest index value, such as CORESET 0). Additionally or alternatively, UE 120 may determine a beam for the BS based at least in part on a beam for a path loss reference signal. In this case, UE 120 may select a beam for the path loss reference signal or another beam that is quasi-co-located with the beam for the path loss reference signal. In some aspects, when a CORESET is configured on a cell (e.g., of BS 110), UE 120 may select a beam for the cell (e.g., for SRS or PUCCH transmissions to BS 110) based at least in part on an active TCI state of the CORESET. Additionally or alternatively, UE 120 may receive a MAC-CE from BS 110 that identifies a beam for the cell for transmissions to BS 110.

[0082] like Figure 7 As further shown in FIG. 1 and in FIG. 730, UE 120 may transmit to one or more TRPs using one or more beams. For example, based at least in part on determining a beam for transmission to first BS 110, UE 120 may transmit an SRS transmission and / or a PUCCH transmission to first BS 110 using a first beam, transmit an SRS transmission and / or a PUCCH transmission to second BS 110 using a second beam, and so on.

[0083] As noted above, providing Figure 7 As an example. Other examples may be different from the Figure 7 The content of the description.

[0084] Figure 8 8 is a diagram illustrating an example process 800 performed, for example, by a UE, according to various aspects of the present disclosure. Example process 800 is an example of operations in which a UE (e.g., UE 120, etc.) performs beam selection associated with communications in an mTRP deployment.

[0085] like Figure 8As shown in , in some aspects, process 800 may include determining a beam set associated with a TRP set based at least in part on at least one of a DCI configuration, a TCI code point mapping, a CORESET configuration, or a TRP index, for which a corresponding uplink beam indication is not configured, wherein the beam set includes an SRS beam or a PUCCH beam (block 810). For example, a UE (e.g., using a controller / processor 280, etc.) may determine a beam set associated with a TRP set based at least in part on at least one of a DCI configuration, a TCI code point mapping, a CORESET configuration, or a TRP index, for which a corresponding uplink beam indication is not configured, as described above. In some aspects, the beam set includes an SRS beam or a PUCCH beam.

[0086] like Figure 8 As further shown in FIG. 8 , in some aspects, process 800 may include communicating with the set of TRPs using the set of beams based at least in part on determining the set of beams (block 820). For example, the UE (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may communicate with the set of TRPs using the set of beams based at least in part on determining the set of beams, as described above.

[0087] Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0088] In a first aspect, determining the beam set includes: determining a single DCI configuration for the TRP set; determining a first beam in the beam set based at least in part on the single DCI configuration, for a first TRP in the TRP set, based at least in part on a first value of the TCI code point mapping; and determining a second beam in the beam set based at least in part on the single DCI configuration, for a second TRP in the TRP set, based at least in part on a second value of the TCI code point mapping.

[0089] In a second aspect, alone or in combination with the first aspect, determining the beam set includes determining a multi-DCI configuration for the TRP set; and determining the beam for the TRP and at least partially based on the beams in the beam set being associated with the TCI state of a CORESET having the same index value as a TRP in the TRP set and determining the beam at least partially based on determining the multi-DCI configuration.

[0090] In a third aspect, alone or in combination with one or more of the first and second aspects, determining the beam set includes determining a multiple DCI configuration for the TRP set; and determining, for a TRP in the TRP set and at least partially based on determining the multiple DCI configuration, a beam in the beam set for receiving a physical downlink shared channel (PDSCH) from the same TRP.

[0091] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, the beam is selected at least in part based on a scheduling offset between a scheduled physical downlink control channel and a scheduled PDSCH being less than a beam switching delay threshold.

[0092] In the fifth aspect, alone or in combination with one or more of the first to fourth aspects, determining the beam set includes determining a multiple DCI configuration for the TRP set; and determining the beams in the beam set for the TRP in the TRP set and at least partially based on the TCI state of the physical downlink shared channel beam and at least partially based on determining the multiple DCI configuration.

[0093] In the sixth aspect, alone or in combination with one or more of the first to fifth aspects, determining the beam set includes determining a multiple DCI configuration for the TRP set; and determining the beam in the beam set for the TRP and at least partially based on the TCI state of a physical downlink shared channel beam having the same TRP index as a TRP in the TRP set.

[0094] In the seventh aspect, alone or in combination with one or more of the first to sixth aspects, determining the beam set includes determining a multiple DCI configuration for the TRP set; and for a TRP in the TRP set and at least partially based on determining the multiple DCI configuration, determining a beam in the beam set for a PUCCH resource having the same TRP index as the TRP and having a configured corresponding uplink beam indication.

[0095] In the eighth aspect, alone or in combination with one or more of the first to seventh aspects, determining the beam set includes determining the beam in the beam set for a TRP in the TRP set, at least in part based on a corresponding beam for receiving a PDSCH.

[0096] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the beam is selected at least in part based on a scheduling offset between a scheduled physical downlink control channel and a scheduled PDSCH being less than a beam switching delay threshold.

[0097] In the tenth aspect, alone or in combination with one or more of the first to ninth aspects, determining the beam set includes determining the beams in the beam set for the TRPs in the TRP set based at least in part on the active TCI state of the CORESET.

[0098] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, determining the beam set includes determining, for the first TRP in the TRP set, the beam in the beam set based at least in part on the TCI state of a scheduled physical downlink control channel associated with a scheduled non-periodic sounding reference signal or PUCCH.

[0099] In the twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, determining the beam set includes, for the first TRP in the TRP set, determining the beam in the beam set based at least in part on a physical downlink shared channel beam for a non-periodic sounding reference signal or PUCCH that is not scheduled by a physical downlink control channel.

[0100] In the thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, the beam is selected at least in part based on a scheduling offset between a scheduled physical downlink control channel and a scheduled PDSCH being less than a beam switching delay threshold.

[0101] In the fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, determining the beam set includes determining the beams in the beam set for the TRPs in the TRP set, at least in part based on a quasi-co-location assumption of a CORESET.

[0102] In the fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, determining the beam set includes determining the beams in the beam set for the TRPs in the TRP set based at least in part on a path loss reference signal.

[0103] In the sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, determining the beam set includes determining the beams in the beam set for the TRPs in the TRP set, at least in part based on the active TCI state of the CORESET configured on the cell of the beam.

[0104] In the seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, determining the beam set includes determining the beams in the beam set for the TRPs in the TRP set, at least in part based on the active physical downlink shared channel TCI state of the cell used for the beam.

[0105] In an eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, the cell does not have a configured CORESET.

[0106] In the nineteenth aspect, alone or in combination with one or more of the first to eighteenth aspects, determining the beam set includes determining the beams in the beam set for the TRPs in the TRP set, at least in part based on a MAC control element selection.

[0107] In the twentieth aspect, alone or in combination with one or more of the first to nineteenth aspects, determining the beam set includes determining the beams in the beam set based, for the TRPs in the TRP set, at least in part on the active TCI state selected by the physical downlink shared channel or MAC.

[0108] In a twenty-first aspect, alone or in combination with one or more of the first to twentieth aspects, the beam set includes a path loss reference signal.

[0109] In the twenty-second aspect, either alone or in combination with one or more of the first to twenty-first aspects, the corresponding uplink beam indication comprises a spatial relationship or an uplink transmission configuration indicator status.

[0110] Although Figure 8 Example blocks of process 800 are shown, but in some aspects process 800 may include Figure 8 In some embodiments, the process 800 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in the process 800. Additionally or alternatively, two or more blocks in the blocks of process 800 may be executed in parallel.

[0111] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the various aspects to the exact forms disclosed. Modifications and changes can be made based on the above disclosure, or modifications and changes can be obtained from the practice of various aspects.

[0112] As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, and / or a combination of hardware and software.

[0113] As used herein, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0114] It is 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 a limitation of the various aspects. Therefore, the operation and behavior of the systems and / or methods are described herein without reference to specific software code, and it should be understood that software and hardware can be designed to implement the systems and / or methods based at least in part on the description herein.

[0115] Although the specific combination of features is recorded in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner that is not specifically recorded in the claims and / or disclosed in the specification. Although each dependent claim listed below can directly rely on only one claim, the disclosure of various aspects includes the combination of each dependent claim with each other claim in the claim set. The phrase "at least one" mentioned in the list of items refers to any combination of these items, including single members. As an example, "at least one of a, b or c" is intended to cover any combination of a, b, c, ab, ac, bc and abc, and specific multiples of the same elements (for example, aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc or any other ordering of a, b and c.

[0116] Unless explicitly described as such, any element, action or instruction used herein should not be interpreted as critical or essential. In addition, as used herein, the articles "one" and "an" are intended to include one or more items and can be used interchangeably with "one or more". In addition, 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 items and unrelated items, etc.), and can be used interchangeably with "one or more". In the case of meaning only one item, the phrase "only one" or similar language is used. In addition, as used herein, the terms "have", "have", "have" etc. are intended to be open terms. In addition, unless otherwise expressly stated, the phrase "based on" is intended to mean "based at least in part on".

Claims

1. A method of wireless communication performed by a user equipment (UE), comprising: determining whether the UE operates in a single downlink control information (DCI) scenario with multiple transmit-receive points (TRPs) or whether the UE operates in a multiple DCI scenario with multiple TRPs; Determining a beam set associated with a TRP set, wherein the beam set includes a sounding reference signal SRS beam or a physical uplink control channel PUCCH beam, wherein determining the beam set includes: When the UE determines that the UE operates in a single DCI scenario: For a first TRP in the set of TRPs, determining a first beam in the set of beams based at least in part on a first value of a transmission configuration indicator (TCI) codepoint mapping; and determining, for a second TRP in the set of TRPs, a second beam in the set of beams based at least in part on a second value of the TCI codepoint mapping; When the UE determines that the UE operates in a multi-DCI scenario, performing one of the following: determining, for a TRP in the set of TRPs, the beams in the set of beams based at least in part on being associated with a TCI state of a CORESET having the same index value as the TRP; determining, for a TRP in the TRP set, a beam in the beam set based at least in part on a TCI state of a PDSCH beam; or For a TRP in the TRP set, determining a beam in the beam set for a PUCCH resource having the same TRP index as the TRP and having a configured corresponding uplink beam indication; and Based at least in part on determining the beam set, communicating with the TRP set using the beam set.

2. The method according to claim 1, wherein: The set of beams includes a path loss reference signal.

3. The method according to claim 1, wherein: The corresponding uplink beam indication includes a spatial relationship or an uplink transmission configuration indicator status.

4. The method according to claim 1, wherein: Determining the beam set includes: For a TRP in the TRP set and based at least in part on determining that the UE is operating in a multi-DCI scenario, determine a beam in the beam set for receiving a PDSCH from the same TRP.

5. The method according to claim 4, wherein: The beam is selected based at least in part on a scheduling offset between a scheduled physical downlink control channel and a scheduled PDSCH being less than a beam switching delay threshold.

6. The method according to claim 1, wherein: Determining the beam set includes: For a TRP in the TRP set and based at least in part on determining that the UE is operating in a multi-DCI scenario, a beam in the beam set is determined based at least in part on a TCI state of a physical downlink shared channel beam having the same TRP index as the TRP.

7. The method according to claim 1, wherein: Determining the beam set includes: For a TRP in the TRP set, a beam in the beam set is determined based at least in part on a corresponding beam used to receive the PDSCH.

8. The method according to claim 7, wherein: The beam is selected based at least in part on a scheduling offset between a scheduled physical downlink control channel and a scheduled PDSCH being less than a beam switching delay threshold.

9. The method according to claim 1, wherein: Determining the beam set includes: For a TRP in the TRP set, a beam in the beam set is determined based at least in part on an active TCI state of a CORESET.

10. The method according to claim 1, wherein: Determining the beam set includes: For a first TRP in the TRP set, a beam in the beam set is determined based at least in part on a TCI state of a scheduled physical downlink control channel associated with a scheduled non-periodic sounding reference signal or PUCCH.

11. The method according to claim 1, wherein: Determining the beam set includes: For a first TRP in the set of TRPs, a beam in the set of beams is determined based at least in part on a physical downlink shared channel beam for a non-periodic sounding reference signal or PUCCH that is not scheduled by a physical downlink control channel.

12. The method according to claim 11, wherein: The beam is selected based at least in part on a scheduling offset between a scheduled physical downlink control channel and a scheduled PDSCH being less than a beam switching delay threshold.

13. The method according to claim 1, wherein: Determining the beam set includes: For a TRP in the TRP set, a beam in the beam set is determined based at least in part on a quasi co-location assumption of a CORESET.

14. The method according to claim 1, wherein: Determining the beam set includes: For a TRP in the TRP set, a beam in the beam set is determined based at least in part on a path loss reference signal.

15. The method according to claim 1, wherein: Determining the beam set includes: For a TRP in the TRP set, the beam is determined based at least in part on an active TCI state of a CORESET configured on a cell of the beam in the beam set.

16. The method according to claim 1, wherein: Determining the beam set includes: For a TRP in the TRP set, the beam is determined based at least in part on an active physical downlink shared channel (TCI) state of a cell for the beam in the beam set.

17. The method according to claim 16, wherein: The cell does not have a configured CORESET.

18. The method according to claim 1, wherein: Determining the beam set includes: For a TRP in the TRP set, a beam in the beam set is determined based at least in part on a medium access control MAC control element selection.

19. The method according to claim 1, wherein: Determining the beam set includes: For a TRP in the TRP set, a beam in the beam set is determined based at least in part on an active TCI state selected by a physical downlink shared channel or a medium access control MAC.

20. A user equipment UE for wireless communication, comprising: Memory; as well as one or more processors operably coupled to the memory, the one or more processors configured to: determining whether the UE operates in a single downlink control information (DCI) scenario with multiple transmit-receive points (TRPs) or whether the UE operates in a multiple DCI scenario with multiple TRPs; determining a beam set associated with a TRP set, wherein the beam set comprises a sounding reference signal SRS beam or a physical uplink control channel PUCCH beam, Wherein, in order to determine the beam set, when the UE determines that the UE operates in a single DCI scenario, the one or more processors are configured to: For a first TRP in the set of TRPs, determining a first beam in the set of beams based at least in part on a first value of a transmission configuration indicator (TCI) codepoint mapping; and determining, for a second TRP in the set of TRPs, a second beam in the set of beams based at least in part on a second value of the TCI codepoint mapping; Wherein, in order to determine the beam set, when the UE determines that the UE operates in a multi-DCI scenario, the one or more processors are configured to perform one of the following: determining, for a TRP in the set of TRPs, the beams in the set of beams based at least in part on being associated with a TCI state of a CORESET having the same index value as the TRP; determining, for a TRP in the TRP set, a beam in the beam set based at least in part on a TCI state of a PDSCH beam; or For a TRP in the TRP set, determining a beam in the beam set for a PUCCH resource having the same TRP index as the TRP and having a configured corresponding uplink beam indication; and Based at least in part on determining the beam set, communicating with the TRP set using the beam set.

21. The UE according to claim 20, wherein: The set of beams includes a path loss reference signal.

22. The UE according to claim 20, wherein: The corresponding uplink beam indication includes a spatial relationship or an uplink transmission configuration indicator status.

23. A non-transitory computer readable medium storing a set of instructions for wireless communication, the set of instructions comprising: When executed by one or more processors of a user equipment UE, one or more instructions cause the UE to perform the following operations: determining whether the UE operates in a single downlink control information (DCI) scenario with multiple transmit-receive points (TRPs) or whether the UE operates in a multiple DCI scenario with multiple TRPs; determining a beam set associated with a TRP set, wherein the beam set comprises a sounding reference signal SRS beam or a physical uplink control channel PUCCH beam, Wherein, in order to enable the UE to determine the beam set, when the UE determines that the UE operates in a single DCI scenario, the one or more instructions enable the UE to perform the following operations: For a first TRP in the set of TRPs, determining a first beam in the set of beams based at least in part on a first value of a transmission configuration indicator (TCI) codepoint mapping; and determining, for a second TRP in the set of TRPs, a second beam in the set of beams based at least in part on a second value of the TCI codepoint mapping; Wherein, in order to enable the UE to determine the beam set, when the UE determines that the UE operates in a multi-DCI scenario, the one or more instructions enable the UE to perform one of the following: determining, for a TRP in the set of TRPs, the beams in the set of beams based at least in part on being associated with a TCI state of a CORESET having the same index value as the TRP; determining, for a TRP in the TRP set, a beam in the beam set based at least in part on a TCI state of a PDSCH beam; or For a TRP in the TRP set, determining a beam in the beam set for a PUCCH resource having the same TRP index as the TRP and having a configured corresponding uplink beam indication; and Based at least in part on determining the beam set, communicating with the TRP set using the beam set.

24. An apparatus for wireless communication, comprising: means for determining whether the apparatus operates in a single downlink control information DCI scenario with multiple transmit-receive points TRPs or whether the apparatus operates in a multiple DCI scenario with multiple TRPs; Used to determine a beam set associated with a TRP set, wherein the beam set includes a sounding reference signal SRS beam or a physical uplink control channel PUCCH beam, wherein determining the beam set includes: When the device determines that the device operates in a single DCI scenario: For a first TRP in the set of TRPs, determining a first beam in the set of beams based at least in part on a first value of a transmission configuration indicator (TCI) codepoint mapping; and determining, for a second TRP in the set of TRPs, a second beam in the set of beams based at least in part on a second value of the TCI codepoint mapping; When the apparatus determines that the apparatus operates in a multi-DCI scenario, performing one of the following: determining, for a TRP in the set of TRPs, the beams in the set of beams based at least in part on being associated with a TCI state of a CORESET having the same index value as the TRP; determining, for a TRP in the TRP set, a beam in the beam set based at least in part on a TCI state of a PDSCH beam; or For a TRP in the TRP set, determining a beam in the beam set for a PUCCH resource having the same TRP index as the TRP and having a configured corresponding uplink beam indication; and A unit for communicating with the set of TRPs using the set of beams based at least in part on determining the set of beams.

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