Method and apparatus for trp differentiation based on ssb grouping

Abstract

The present disclosure relates to methods and devices, including apparatuses such as UEs and / or base stations, for wireless communication. The apparatus can receive SSB grouping information associated with one or more SSB groups, each of the one or more SSB groups including one or more TRPs. The apparatus can also receive at least one of TCI information or QCL information, each of the TCI information and the QCL information indicating an SSB of the one or more SSB groups associated with a downlink Tx beam for downlink data or an uplink Rx beam for uplink data. Further, the apparatus can transmit the downlink data from a TRP in a same SSB group or a TRP in a different SSB group, or transmit the uplink data to a TRP in the same SSB group or a TRP in the different SSB group, based on at least one of the SSB grouping information, the TCI information, or the QCL information.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of U.S. Provisional Application Serial No. 62 / 980,115, filed on February 21, 2020, entitled “METHODS AND APPARATUS FOR TRP DIFFERENTIATION BASED ON SSB GROUPING,” and U.S. Patent Application Serial No. 17 / 131,590, filed on December 22, 2020, entitled “METHODS AND APPARATUS FOR TRP DIFFERENTIATION BASED ON SSB GROUPING,” which are expressly incorporated herein by reference in their entireties. Technical Field

[0003] The present disclosure relates generally to communication systems, and more particularly, to spatial relationship information in wireless communication systems. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. 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, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0005] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, regional, and even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of the continued mobile broadband evolution promulgated by the 3rd Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., Internet of Things (IoT)), and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There is a need to further improve 5G NR technology. These improvements may also be applicable to other multiple access technologies and telecommunication standards that adopt these technologies. Summary of the Invention

[0006] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

[0007] In one aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus can be a user equipment (UE). The apparatus can receive synchronization signal block (SSB) grouping information associated with one or more SSB groups, each of the one or more SSB groups can include one or more transmission-reception points (TRPs). The apparatus can also receive at least one of transmission configuration indication (TCI) information or quasi co-location (QCL) information, where each of the TCI information and the QCL information can indicate an SSB of the one or more SSB groups that is associated with a downlink transmit (Tx) beam for downlink data or an uplink receive (Rx) beam for uplink data. Additionally, the apparatus can select at least one Rx beam or Tx beam for communication based on at least one SSB property associated with at least one SSB of the plurality of SSBs. The apparatus can also perform a Doppler shift estimation for the at least one Rx beam, where the downlink data can be communicated from a TRP in a same SSB group or a TRP in a different SSB group based on the Doppler shift estimation. The apparatus can also identify at least one of one or more timing advance (TA) parameters or one or more power control (PC) parameters for the at least one Tx beam, where the uplink data can be communicated to the TRP in the same SSB group or the TRP in the different SSB group based on the at least one of the one or more TA parameters or the one or more PC parameters. Moreover, the apparatus can determine whether to communicate the downlink data from the TRP in the same SSB group of the one or more SSB groups or the TRP in the different SSB group of the one or more SSB groups or to communicate the uplink data to the TRP in the same SSB group of the one or more SSB groups or the TRP in the different SSB group of the one or more SSB groups based on at least one of the SSB grouping information, the TCI information, or the QCL information. The apparatus can also communicate the downlink data from the TRP in the same SSB group of the one or more SSB groups or the TRP in the different SSB group of the one or more SSB groups or the uplink data to the TRP in the same SSB group of the one or more SSB groups or the TRP in the different SSB group of the one or more SSB groups based on at least one of the SSB grouping information, the TCI information, or the QCL information. The apparatus can also receive the downlink data from the TRP in the same SSB group of the one or more SSB groups or the TRP in the different SSB group of the one or more SSB groups or transmit the uplink data to the TRP in the same SSB group of the one or more SSB groups or the TRP in the different SSB group of the one or more SSB groups based on at least one of the SSB grouping information, the TCI information, or the QCL information.The apparatus can also decode downlink data received from TRPs in a same SSB group of the one or more SSB groups or TRPs in different SSB groups of the one or more SSB groups based on at least one of the SSB grouping information, TCI information, or QCL information.

[0008] In one aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus can be a base station or a TRP. The apparatus can determine SSB grouping information associated with one or more SSB groups. The apparatus can also transmit SSB grouping information associated with one or more synchronization signal block (SSB) groups, each of the one or more SSB groups including one or more TRPs. In addition, the apparatus can transmit at least one of transmission configuration indication (TCI) information or quasi co-location (QCL) information, where each of the TCI information and the QCL information can indicate an SSB in the one or more SSB groups associated with a downlink transmit (Tx) beam for downlink data or an uplink receive (Rx) beam for uplink data. The apparatus can also encode downlink data for at least one user equipment (UE) based on at least one of the SSB grouping information, the TCI information, or the QCL information. The apparatus can also transmit downlink data to or receive uplink data from the at least one UE based on at least one of the SSB grouping information, the TCI information, or the QCL information.

[0009] To the accomplishment of the foregoing and related aspects, one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects can be employed. This description is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network.

[0011] Figure 2A , 2B , 2C, and 2D are diagrams illustrating examples of a first 5G / NR frame, DL channels within a 5G / NR subframe, a second 5G / NR frame, and UL channels within a 5G / NR subframe, respectively.

[0012] Figure 3 FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network.

[0013] Figures 4A-4C is an example diagram of a TRP differentiation procedure according to one or more techniques of this disclosure.

[0014] Figure 5 is an example diagram of a TRP differentiation procedure according to one or more techniques of this disclosure.

[0015] Figure 6 is an example diagram of a TRP differentiation procedure according to one or more techniques of this disclosure.

[0016] Figure 7 is a diagram illustrating example communications between a UE and a base station or TRP according to one or more techniques of this disclosure.

[0017] Figure 8 is a flowchart of a wireless communication method according to one or more techniques of this disclosure.

[0018] Figure 9 is a flowchart of a wireless communication method according to one or more techniques of this disclosure.

[0019] Figure 10 is a diagram illustrating an example of a hardware implementation for an example apparatus.

[0020] Figure 11 is a diagram illustrating an example of a hardware implementation for an example apparatus. DETAILED DESCRIPTION

[0021] The detailed description set forth below, in connection with the appended drawings and embodiments described herinin, is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein can be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts can be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid obscuring the concepts being described.

[0022] Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the particular application and design constraints imposed on the overall system.

[0023] By way of example, an element, or any portion of an element, or any combination of elements can be implemented as a "processing system" that includes one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on a chip (SoC), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure. One or more processors in the processing system can execute software. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0024] Accordingly, in one or more example embodiments, the functions described can be implemented in hardware, software, or any combination thereof. If implemented in software, the functions can be stored on or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media. Storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the aforementioned types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.

[0025] Figure 1 FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network 100. The wireless communications system (also referred to as a wireless wide area network (WWAN)) includes base stations 102, UEs 104, an Evolved Packet Core (EPC) 160, and another core network 190 (e.g., a 5G Core (5GC)). The base stations 102 can include macro cells (high power cellular base stations) and / or small cells (low power cellular base stations). The macro cells can include base stations. The small cells can include femtocells, picocells, and microcells.

[0026] The base stations 102 configured for 4G LTE (collectively referred to as the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with the EPC 160 through the first backhaul links 132 (e.g., S I interface). The base stations 102 configured for 5G NR (collectively referred to as the Next Generation RAN (NG-RAN)) can interface with the core network 190 through the second backhaul links 184. In addition to other functions, the base stations 102 can perform one or more of the following functions: transfer of user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment trace, RAN information management (RIM), paging, positioning, and delivery of warning messages. The base stations 102 can communicate directly or indirectly (e.g., through the EPC 160 or core network 190) with each other over the third backhaul links 134 (e.g., X2 interface). The third backhaul links 134 can be wired or wireless.

[0027] The base stations 102 can wirelessly communicate with the UEs 104. Each of the base stations 102 can provide communication coverage for a respective geographic coverage area 110. There can be overlapping geographic coverage areas 110. For example, a small cell 102' can have a coverage area 110' that overlaps with one or more macrocells 102. A network that includes both small cell and macrocells can be known as a heterogeneous network. A heterogeneous network can also include Home Evolved Node Bs (eNBs) (HeNBs), which can provide service to a restricted group known as a closed subscriber group (CSG). The communication links 120 between the base stations 102 and the UEs 104 can include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a base station 102 and / or downlink (DL) (also referred to as forward link) transmissions from a base station 102 to a UE 104. The communication links 120 can use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication links can be through one or more carriers, and each carrier can be a band of frequency waves having a predetermined bandwidth. The base stations 102 / UEs 104 can use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) bandwidth per carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) used for transmission in each direction. The carriers can or can not be adjacent to each other. Allocation of carriers can be asymmetric with respect to DL and UL (e.g., more or less carriers can be allocated for DL than for UL). The component carriers can include a primary component carrier and one or more secondary component carriers. A primary component carrier can be referred to as a primary cell (PCell) and a secondary component carrier can be referred to as a secondary cell (SCell).

[0028] Certain UEs 104 can communicate with each other using device-to-device (D2D) communication link 158. The D2D communication link 158 can use the DL / UL WWAN spectrum. The D2D communication link 158 can use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). D2D communication can be through a variety of wireless D2D communications systems, such as for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on IEEE 802.11 standards, LTE, or NR.

[0029] The wireless communications system can further include a Wi-Fi access point (AP) 150 in communication with Wi-Fi stations (STAs) 152 via communication links 154 in a 5 GHz unlicensed frequency spectrum. When communicating in an unlicensed frequency spectrum, the STAs 152 / AP 150 can perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.

[0030] The small cells 102' can operate in a licensed and / or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cells 102' can employ NR and use the same 5 GHz unlicensed frequency spectrum as used by the Wi-Fi AP 150. The small cells 102' employing NR in an unlicensed frequency spectrum can expand the coverage of the access network and / or increase the capacity of the access network.

[0031] The base stations 102, whether small cell 102' or large cell (e.g., macro base station), can include and / or be referred to as an eNB, gNodeB (gNB), or another type of base station. Some base stations, such as gNB 180 can operate in a traditional sub 6 GHz spectrum, in millimeter wave (mmW) frequencies, and / or near mmW frequencies in communication with the UEs 104. When the gNB 180 operates in mmW or near mmW frequencies, the gNB 180 can be referred to as a mmW base station. Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range from 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters. Radio waves in this band can be referred to as a millimeter wave. Near mmW can extend down to a frequency of 3 GHz with a wavelength of 100 millimeters. The super high frequency (SHF) band extends between 3 GHz and 30 GHz, also referred to as centimeter wave. Communications using the mmW / near mmW radio frequency band (e.g., 3 GHz - 300 GHz) has extremely high path loss and a short range. The mmW base station 180 can utilize beamforming 182 with the UEs 104 to compensate for the extremely high path loss and short range. The base station 180 and the UEs 104 can each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays, to facilitate beamforming.

[0032] The base stations 180 can transmit beamformed signals to the UEs 104 in one or more transmit directions 182'. The UEs 104 can receive the beamformed signals from the base stations 180 in one or more receive directions 182". The UEs 104 can also transmit beamformed signals to the base stations 180 in one or more transmit directions. The base stations 180 can receive the beamformed signals from the UEs 104 in one or more receive directions. The base stations 180 / UEs 104 can perform beam training to determine the best receive and transmit directions for each base station 180 / UE 104. The transmit and receive directions for the base stations 180 can or can not be the same. The transmit and receive directions for the UEs 104 can or can not be the same.

[0033] The EPC 160 can include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. The MME 162 can be in communication with a Home Subscriber Server (HSS) 174. The MME 162 is the control node that processes the signaling between the UEs 104 and the EPC 160. Generally, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are transferred through the Serving Gateway 166, which itself is connected to the PDN Gateway 172. The PDN Gateway 172 provides UE IP address allocation as well as other functions. The PDN Gateway 172 and the BM-SC 170 are connected to the IP Services 176. The IP Services 176 can include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS Streaming Service, and / or other IP services. The BM-SC 170 can provide functions for MBMS user service provisioning and delivery. The BM-SC 170 can serve as an entry point for content provider MBMS transmissions, can be used to authorize and initiate MBMS Bearer Services, and can be used to schedule MBMS transmissions. The MBMS Gateway 168 can be used to

[0034] The core network 190 can include an Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195. The AMF 192 can be in communication with a Unified Data Management (UDM) 196. The AMF 192 is the control node that processes the signaling between the UEs 104 and the core network 190. Generally, the AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are transferred

[0035] Base stations can include and / or be referred to as a gNB, NodeB, eNB, access point, base transceiver station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), transmit reception point (TRP), or some other suitable terminology. The base station 102 provides wireless access to the EPC 160 or core network 190 for the UEs 104. Examples of UEs 104 include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor / actuator, a display, or any other similar functional device. Some of the UEs 104 can be referred to as IoT devices (e.g., parking meter, gas pump, toaster, vehicle, heart monitor, etc.). The UE 104 can also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.

[0036] Referring again to Figure 1In certain aspects, the UE 104 can include a reception component 198 configured to receive SSB grouping information associated with one or more synchronization signal block (SSB) groups, each of the one or more SSB groups can include one or more transmission-reception points (TRPs). The reception component 198 can be further configured to receive at least one of transmission configuration indication (TCI) information or quasi co-location (QCL) information, where each of the TCI information and the QCL information can indicate an SSB of the one or more SSB groups that is associated with a downlink transmit (Tx) beam for downlink data or an uplink receive (Rx) beam for uplink data. The reception component 198 can be further configured to select at least one Rx beam or Tx beam for communication based on at least one SSB property associated with at least one SSB of the plurality of SSBs. The reception component 198 can be further configured to perform a Doppler shift estimation on the at least one Rx beam, where the downlink data can be communicated from a TRP of a same SSB group or a TRP of a different SSB group based on the Doppler shift estimation. The reception component 198 can be further configured to identify at least one of one or more timing advance (TA) parameters or one or more power control (PC) parameters of the at least one Tx beam, where the uplink data can be communicated to the TRP of the same SSB group or the TRP of the different SSB group based on the at least one of the one or more TA parameters or the one or more PC parameters. The reception component 198 can be further configured to determine whether to communicate the downlink data from the TRP of the same SSB group of the one or more SSB groups or the TRP of the different SSB group of the one or more SSB groups or whether to communicate the uplink data to the TRP of the same SSB group of the one or more SSB groups or the TRP of the different SSB group of the one or more SSB groups based on at least one of the SSB grouping information, the TCI information, or the QCL information. The reception component 198 can be further configured to communicate the downlink data from the TRP of the same SSB group of the one or more SSB groups or the TRP of the different SSB group of the one or more SSB groups or to communicate the uplink data to the TRP of the same SSB group of the one or more SSB groups or the TRP of the different SSB group of the one or more SSB groups based on at least one of the SSB grouping information, the TCI information, or the QCL information. The reception component 198 can be further configured to receive the downlink data from the TRP of the same SSB group of the one or more SSB groups or the TRP of the different SSB group of the one or more SSB groups or to transmit the uplink data to the TRP of the same SSB group of the one or more SSB groups or the TRP of the different SSB group of the one or more SSB groups based on at least one of the SSB grouping information, the TCI information, or the QCL information.The reception component 198 can also be configured to decode downlink data received from TRPs in a same SSB group of the one or more SSB groups or TRPs in different SSB groups of the one or more SSB groups based on at least one of the SSB grouping information, the TCI information, or the QCL information.

[0037] Referring again to Figure 1 In certain aspects, the base station 180 can include a transmission component 199 configured to determine SSB grouping information associated with one or more SSB groups. The transmission component 199 can also be configured to transmit SSB grouping information associated with one or more synchronization signal block (SSB) groups, each of the one or more SSB groups including one or more TRPs. The transmission component 199 can also be configured to transmit at least one of transmission configuration indication (TCI) information or quasi co-location (QCL) information, each of the TCI information and the QCL information can indicate an SSB in the one or more SSB groups associated with a downlink transmit (Tx) beam for downlink data or an uplink receive (Rx) beam for uplink data. The transmission component 199 can also be configured to encode downlink data for transmission to at least one UE based on at least one of the SSB grouping information, the TCI information, or the QCL information. The transmission component 199 can also be configured to transmit downlink data to or receive uplink data from at least one user equipment (UE) based on at least one of the SSB grouping information, the TCI information, or the QCL information. The transmission component 199 can also be configured to transmit downlink data to or receive uplink data from at least one UE based on at least one of the SSB grouping information, the TCI information, or the QCL information.

[0038] Although the following description can be focused on 5G NR, the concepts described herein can be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0039] Figure 2A FIG. 200 is an illustration 200 of an example of a first subframe within a 5G / NR frame structure. Figure 2B FIG. 230 is an illustration 230 of an example of DL channels within a 5G / NR subframe. Figure 2C FIG. 250 is an illustration 250 of an example of a second subframe within a 5G / NR frame structure. Figure 2Dis a diagram 280 illustrating an example of UL channels within a 5G / NR subframe. The 5G / NR frame structure can be FDD in which, for a particular set of subcarriers (carrier system bandwidth), the subframe is dedicated for DL or UL, or TDD in which, for a particular set of subcarriers (carrier system bandwidth), the subframe is dedicated for both DL and UL. In Figure 2A , 2C In the example provided, the 5G / NR frame structure is assumed to be TDD, subframe 4 is configured with slot format 28 (mostly DL), where D is DL, U is UL, and X is flexibly used between DL / UL, and subframe 3 is configured with slot format 34 (mostly UL). While subframes 3, 4 are shown with slot formats 34, 28, respectively, any particular subframe can be configured to have any of the various available slot formats 0-61. Slot formats 0, 1 are all DL, UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. A UE is configured with a slot format (either dynamically with DL control information (DCI), or semi- statically / statically with radio resource control (RRC) signaling) by a received slot format indicator (SFI). Note that the following description also applies for 5G / NR frame structures that are TDD.

[0040] Other wireless communication technologies can have different frame structures and / or different channels. A frame (10 ms) can be divided into 10 equally sized subframes (1 ms). Each subframe can include one or more slots. A subframe can also include mini-slots, which can contain 7, 4, or 2 symbols. Depending on the slot configuration, each slot can contain 7 or 14 symbols. For slot configuration 0, each slot can contain 14 symbols, while for slot configuration 1, each slot can contain 7 symbols. A symbol on the DL can be a cyclic prefix (CP) orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbol. A symbol on the UL can be a CP-OFDM symbol (for high throughput cases) or a discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbol (also known as single carrier frequency division multiple access (SC-FDMA) symbol) (for power limited cases; limited to single stream transmission). The number of slots within a subframe is dependent on the slot configuration and the numerology. For slot configuration 0, different numerologies m0to 5 allow 1, 2, 4, 8, 16, and 32 slots per subframe, respectively. For slot configuration 1, different numerologies 0 to 2 allow 2, 4, and 8 slots per subframe, respectively. Thus, for slot configuration 0 and numerology m, there are 14 symbols / slot and 2 μ The subcarrier spacing and symbol length / duration are functions of the numerology. The subcarrier spacing can equal 2 μ* 15 kHz, where μ is the numerology 0 to 5. In this way, the numerology μ = 0 has a subcarrier spacing of 15 kHz, and the numerology μ = 5 has a subcarrier spacing of 480 kHz. The symbol length / duration is inversely proportional to the subcarrier spacing. Figures 2A-2D An example of a slot configuration 0 with 14 symbols per slot and a numerology μ = 2 with 4 slots per subframe is provided. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs.

[0041] A resource grid can be used to represent the frame structure. Each time slot includes a resource block (RB) (also referred to as physical RB (PRB)) that extends 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0042] As Figure 2A illustrated, some of the REs carry reference (pilot) signals (RS) for the UE. The RS can include demodulation RS (DM-RS) (indicated as Rx for one particular configuration, where 100x is the port number, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RS) for channel estimation at the UE. The RS can also include beam measurement RS (BRS), beam refinement RS (BRRS), and phase tracking RS (PT-RS).

[0043] Figure 2B An example of various DL channels is illustrated. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs), each CCE including nine RE groups (REGs), each REG including four consecutive REs in an OFDM symbol. A primary synchronization signal (PSS) can be within symbol 2 of particular subframes of a frame. The PSS is used by a UE 104 to determine subframe / symbol timing and a physical layer identity. A secondary synchronization signal (SSS) can be within symbol 4 of particular subframes of a frame. The SSS is used by a UE to determine a physical layer cell identity group number and a radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine a physical cell identifier (PCI). Based on the PCI, the UE can determine the locations of the aforementioned DM-RS. The physical broadcast channel (PBCH), which carries a master information block (MIB) that provides system bandwidth configuration and scheduling information, can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block. The physical downlink shared channel (PDSCH) carries user data, broadcast system information such as system information blocks (SIBs), and paging messages.

[0044] As Figure 2CFor a particular configuration, some of the REs carry DM-RS (indicated as R for one particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE can transmit DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH). The PUSCH DM-RS can be transmitted in the first one or two symbols of the PUSCH. The PUCCH DM-RS can be transmitted in different configurations depending on whether short or long PUCCH, and on the particular PUCCH format used. The UE can transmit a sounding reference signal (SRS). The SRS can be transmitted in the last symbol of a subframe. The SRS can have a comb- structure, and a UE can transmit an SRS on one of the combs. The SRS can be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL.

[0045] Figure 2D An example of various UL channels within a subframe of a frame is shown. In one configuration, the PUCCH can be positioned as indicated. The PUCCH carries uplink control information (UCI), such as scheduling requests, a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), and HARQ ACK / NACK feedback. The PUSCH carries data, and can additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0046] Figure 3FIG. 13 is a block diagram of a base station 310 in communication with a UE 350 in an access network. In the DL, IP packets from the EPC 160 can be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIBs), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter radio access technology (RAT) mobility, and measurement configuration

[0047] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1, which includes a physical (PHY) layer, can include error detection on the transport channels, forward error correction (FEC) coding / decoding of the transport channels, interleaving, rate matching, mapping to physical channels, modulation / demodulation of physical channels, and MIMO antenna processing. The TX processor 316 handles mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), M-phase-shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols can then be split into parallel streams. Each stream can then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and / or frequency domain, and then combined together using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator 374 can be used to determine the coding and modulation schemes, as well as for spatial processing. The channel estimate can be derived from a reference signal and / or channel condition feedback transmitted by the UE 350. Each spatial stream can then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX can modulate an RF carrier with a respective spatial stream for transmission.

[0048] At the UE 350, each receiver 354RX receives a signal through its respective antenna 352. Each receiver 354RX recovers information modulated onto an RF carrier and provides the information to the receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, they can be combined by the RX processor 356 into a single OFDM symbol stream. The RX processor 356 then converts the OFDM symbol stream from the time-domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, and the reference signal, are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station 310. These soft decisions can be based on channel estimates computed by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the base station 310 on the physical channel. The data and control signals are then provided to the controller / processor 359, which implements layer 3 and layer 2 functionality.

[0049] The controller / processor 359 can be associated with a memory 360 that stores program codes and data. The memory 360 can be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.

[0050] Similar to the functionality described in connection with the DL transmission by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression / decompression, and security (ciphering, deciphering, integrity protection, integrity verification); RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transmission channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0051] The TX processor 368 can use channel estimates derived by the channel estimator 358 from a reference signal or feedback transmitted by the base station 310 to select the appropriate coding and modulation schemes and facilitate spatial processing. The spatial streams generated by the TX processor 368 can be provided to different antenna 352 via separate transmitters 354TX. Each transmitter 354TX can modulate an RF carrier with a respective spatial stream for transmission.

[0052] The UL transmission is processed at the base station 310 in a manner similar to that described in connection with the receiver function at the UE 350. Each receiver 318RX receives a signal through its respective antenna 320. Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to a RX processor 370.

[0053] The controller / processor 375 can be associated with a memory 376 that stores program codes and data. The memory 376 can be referred to as a computer-readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE 350. IP packets from the controller / processor 375 can be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.

[0054] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 can be configured to perform aspects of the methods 198 related to Figure 1

[0055] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 can be configured to perform aspects of the methods 199 related to Figure 1

[0056] Transmission configuration indication (TCI) information can be used to indicate quasi-co-location (QCL) relationships for downlink transmissions. Two antenna ports are said to be quasi-co-located if a property of the channel that conveys a symbol on one antenna port can be inferred from the channel that conveys a symbol on the other antenna port. A group of two QCL antenna ports can have a common set of QCL relationships, such as one or more of Doppler shift, Doppler spread, average delay, delay spread, or spatial Rx parameters. A UE can utilize the QCL relationships of a pair of beams to infer information from one beam to another beam.

[0057] Some aspects of wireless communications can include a UE moving at a high rate of speed and communicating with a set of base stations or TRPs. In these cases, the UE is moving at a high rate of speed, and thus the set of base stations or TRPs can transmit the same data to the UE. The data transmission can be referred to as a single frequency network (SFN) transmission. In some aspects, these cases can include a high speed train single frequency network (HST-SFN), for example, if the UE is on a high speed train. Some aspects of wireless communications for HST-SFN can be used for traditional sub-6 GHz systems, such as LTE, NR, like NR frequency range 1 (FR1), etc. In some cases, the base stations or TRPs can use pseudo-omni beams or digital beamforming. In these aspects, it can be sufficient for multiple TRPs to send the same data on pseudo-omni beams, i.e., SFN transmission. Thus, using SFN transmission can result in the UE receiving the transmitted data.

[0058] ​​Some aspects of wireless communication of HST-SFN can be used for millimeter wave (MMW) systems, such as NR frequency range 2 (FR2). The wireless communication aspects of HST-SFN can also utilize analog beamforming. In these aspects, the analog Tx or Rx beam can be determined before data transmission or reception. When multiple beam pairs are used, the UE location can determine whether the two beam pairs are associated with the same TRP or different TRPs. In some cases, if the two beam pairs are associated with different TRPs, some characteristics between the two beams may be different. For example, these characteristics may include timing advance (TA) parameters and / or power control (PC) parameters in the uplink, and Doppler shift estimates in the downlink or uplink. Therefore, the UE may be located between two TRPs, where the UE receives multiple beams from the two TRPs. If the UE is located near a single TRP, the UE may receive multiple beams from the same TRP.

[0059] Figures 4A-4C 400, 410, and 420 are diagrams of a TRP differentiation process, respectively, according to one or more techniques of the present disclosure. Figure 4A As shown, diagram 400 includes UE 402, TRP 404, TRP 406, and TRP 408. Figure 4A In the embodiment of the present invention, UE 402 can move at a high speed. Figure 4A An example is shown when analog beamforming is not used, such as in LTE or NR FR1. For example, UE 402 can utilize a simple SFN.

[0060] like Figure 4B As shown, diagram 410 includes UE 412, TRP 414, TRP 416, and TRP 418. Figure 4B In FIG4 , UE 412 is moving at a high rate and is between TRPs 414 and 416. At this time, UE 412 is using one beam pair from TRP 414 and one beam pair from TRP 416. Figure 4B It is shown that when moving at a high rate, a UE (e.g., UE 412) can utilize different beam pairs from different TRPs (e.g., TRP 414 and TRP 416).

[0061] like Figure 4C As shown, diagram 420 includes UE 422, TRP 424, TRP 426, and TRP 428. Figure 4C In Figure 4, UE 422 is moving at a high rate and is close to TRP 424. Here, UE 422 is using two beam pairs from TRP 424. Therefore, Figure 4CIt is shown that a UE (e.g., UE 422) can utilize different beam pairs from the same TRP (e.g., TRP 424) when moving at high rates.

[0062] As indicated above in Figures 4A-4C A UE located between two TRPs can cause the UE to receive and / or transmit multiple beams from two TRPs. Further, if the UE is located near a single TRP, the UE can receive and / or transmit multiple beams from the same TRP. As described above, high rate movement can cause the UE to switch coverage between TRPs. Further, switching between TRPs can cause an increase in the amount of power used and / or the amount of beam processing time, for example, via beam sweeping. By reducing the amount of TRP switching, the UE can reduce the amount of power used and / or reduce the amount of beam processing time, for example, via beam sweeping. Thus, it can be beneficial for a UE to distinguish from which TRP to receive data or to which TRP to transmit data.

[0063] Aspects of the disclosure can allow a UE to distinguish from which TRP to receive data or to which TRP to transmit data. As such, a UE according to the disclosure can determine whether multiple beam pairs are associated with different TRPs or the same TRP. Thus, according to the disclosure, a UE can distinguish TRPs for multiple transmit beams. By distinguishing TRPs, a UE here can reduce the amount of switching between different TRPs. Thus, by distinguishing TRPs, a UE can reduce the amount of power used and / or reduce the amount of beam processing time, for example, via beam sweeping, when switching between TRPs. By taking advantage of the fact that signals are transmitted from different TRPs, the distinction of TRPs can also improve decoding performance, for example, accurate Doppler shift estimation for downlink communications, and accurate TA or PC control for uplink communications. Further, aspects of the disclosure can reduce the amount of beam sweeping time at each TRP. Further, if two adjacent TRPs have the same cell ID, a UE can distinguish the two TRPs based on SSB grouping.

[0064] Aspects of the present disclosure may also utilize TRP differentiation based on SSB grouping information. As indicated above, by utilizing SSB grouping information to differentiate TRPs, a UE according to the present disclosure may reduce, for example, the amount of power used via beam scanning and / or beam processing time when switching between TRPs. In addition, each TRP may have the same cell identifier (ID) or a different cell ID. Therefore, the TRP differentiation herein may be applied when the TRPs have the same cell ID and / or the TRPs have different cell IDs. In addition, the TRP differentiation herein may be applied when all TRPs have the same cell ID. From the UE's perspective, if the TRPs have the same cell ID, the signals from the TRPs may be different, and thus the UE may differentiate between TRPs with the same cell ID.

[0065] Figure 5 FIG5 is a diagram 500 illustrating a TRP differentiation process according to one or more techniques of this disclosure. Figure 5 As shown, diagram 500 includes UE 502, TRP 511, TRP 512, TRP 513, TRP 514, TRP 515, TRP 516, TRP 517, TRP 518, and TRP 519. Figure 5 In the case of a UE 502, the UE 502 can move at a high speed within the coverage area of ​​the TRP 511-519. When the UE 502 moves through the coverage area of ​​the TRP, the UE 502 can switch the coverage area and / or beam of the TRP 511-519. Figure 5 As shown, TRPs 511-513 can each include the same cell ID, e.g., cell ID 1. Additionally, TRPs 514-516 can each include the same cell ID, e.g., cell ID 2. Additionally, TRPs 517-519 can each include the same cell ID, e.g., cell ID 3. In some aspects, all TRPs (TRPs 511-519) can have the same cell ID, e.g., cell ID 1. Because TRP 513 and TRP 514 have different cell IDs, e.g., cell IDs 1 and 2, respectively, UE 502 can switch between TRPs 513 and 514.

[0066] Figure 5 It is shown that the SSB groups may include different cell IDs or the same cell ID. Figure 5As shown, for cell ID 1, there can be 15 SSBs, e.g., SSBs 1-15. For example, SSB group 1 can include SSBs 1-5, SSB group 2 can include SSBs 6-10, and SSB group 3 can include SSBs 11-15. Different SSBs can be associated with different transmit beams from a corresponding TRP or base station, e.g., SSBs 1-5 are associated with TRPs 511, 514, and 517. Further, SSBs 6-10 are associated with TRPs 512, 515, and 518, and SSBs 11-15 are associated with TRPs 513, 516, and 519. In this way, a TRP or base station can transmit beams 1-5, and SSBs 1-5 can correspond to each of the five beams. Thus, different transmit beams can be separated into different SSB groups.

[0067] In some aspects, SSBs can be grouped into a number of groups, e.g., N groups. Further, one TRP can be associated with one SSB group. In this way, a UE can distinguish a TRP transmitting data based on SSB grouping information. A UE can also distinguish a TRP transmitting data based on transmission configuration indication (TCI) information or quasi co-location (QCL) information. In some cases, SSB grouping information can be transmitted from a TRP or base station to a UE via system information (SI) or RRC signaling. SSB grouping information transmitted via RRC signaling can be long-term information that is not frequently updated. Further, if a TRP or base station communicates with a UE by using multiple Tx beams in the downlink (or multiple Rx beams in the uplink), the TRP or base station can inform the UE via DCI which Tx beams (or Rx beams) are used based on TCI information or QCL information. In some cases, beamforming information related to SSBs and / or TCI information or QCL information can be transmitted via DCI and is short-term information that is frequently updated.

[0068] Further, based on the TCI information or QCL information and the SSB grouping information, the UE can determine whether data is transmitted to or received from different TRPs or the same TRP. Accordingly, the UE can use long-term information (e.g., via RRC signaling) and / or short-term information (e.g., via DCI) to determine whether data is transmitted to or received from different TRPs or the same TRP. Further, the UE can use this information to decode downlink data or transmit uplink data. In the downlink case, if data is transmitted from different TRPs, the UE can estimate the Doppler shift separately for each Tx-Rx beam pair. In the uplink case, if data is intended to be received by different TRPs, the UE can use different timing advance (TA) parameters and / or power control (PC) parameters for each Tx-Rx beam pair.

[0069] As described above, the SSB grouping information can be transmitted from the TRP or base station to the UE in the long term, e.g., via RRC signaling. For example, the SSB grouping information can include which SSBs are assigned to which SSB groups, e.g., SSB group 1 = SSB 1 - SSB 5, SSB group 2 = SSB 6 - SSB 10, and SSB group 3 = SSB 11 - SSB 15. Further, the TCI information or QCL information can be transmitted from the TRP or base station to the UE in the short term, e.g., via DCI.

[0070] In some aspects, when multiple beam pairs are from the same TRP, the UE can use the same beam parameters for the TRP differentiation procedure, e.g., TA or PC parameters for uplink and Doppler shift estimation for downlink. For example, TCI 2 can correspond to QCL Type D with SSB 2 and TCI 3 can correspond to QCL Type D with SSB 3. By doing so, the UE can determine that SSB 2 and SSB 3 are in the same SSB group, e.g., SSB group 1. Accordingly, the UE can determine or differentiate that the beams associated with SSB 2 and SSB 3 are from the same TRP.

[0071] In some cases, when multiple beam pairs are from different TRPs, the UE may use different beam parameters for the TRP differentiation process, such as TA or PC parameters for uplink and Doppler shift estimation for downlink. For example, TCI 5 may correspond to QCL type D with SSB 5, and TCI 6 may correspond to QCL type D with SSB 6. By doing so, the UE can determine that SSB 5 and SSB 6 are in different SSB groups, such as SSB groups 1 and 2, respectively. Therefore, the UE can determine or distinguish that the beams associated with SSB 5 and SSB 6 are from different TRPs. Based on this, if the TCI and the corresponding SSB are sent in DCI, the UE can determine that the beams associated with the SSBs are from different TRPs.

[0072] As described above, SSB group information can be long-term information sent via RRC signaling. In addition, TCI information or QCL information can be short-term information sent via DCI and updated more frequently. Therefore, TCI information or QCL information can be continuously updated, while SSB group information can be sent less frequently.

[0073] In addition, there can be several different types of QCL information, such as QCL Type A, QCL Type B, QCL Type C, and QCL Type D. Each of these QCL types can be associated with an analog Tx or Rx beam. In some cases, QCL Type D may be relevant to the TRP differentiation process herein. Furthermore, in some aspects, the source of the TCI state can be the corresponding SSB, and the target of the TCI state can be the PDSCH associated with the TCI information.

[0074] In some aspects, the attributes of the SSBs in an SSB group may be repeated across each SSB group. Based on this, the UE may utilize this information during TRP differentiation. An example of an SSB attribute is the transmit beam pattern relative to the corresponding TRP. Thus, a TRP may transmit different SSBs with different attributes.

[0075] Figure 6 FIG6 is a diagram 600 illustrating a TRP differentiation process according to one or more techniques of this disclosure. Figure 6 As shown, diagram 600 includes UE 602 and TRPs 611-616. In diagram 600, UE 602 can move at a high rate within the coverage area of ​​TRPs 611-616. As UE 602 moves across the coverage area of ​​TRPs, UE 602 can switch the coverage area and / or beam of TRPs 611-616. Figure 6As shown, TRPs 611-613 can each include the same cell ID, e.g., cell ID 1. Further, TRPs 614-616 can each include the same cell ID, e.g., cell ID 2. In some aspects, TRPs 614-616 can include cell ID 1. As TRP 613 and TRP 614 have different cell IDs, e.g., cell IDs 1 and 2, respectively, UE 602 can switch between TRP 613 and 614.

[0076] Figure 6 It is also shown that SSB groups can include different cell IDs or the same cell ID. As Figure 6 shown, cell ID 1 can include 15 SSBs, e.g., SSBs 1-15. For example, SSB group 1 can include SSB 1 - SSB 5, SSB group 2 can include SSB 6 - SSB 10, and SSB group 3 can include SSB 11 - SSB 15. Different SSBs can be associated with different transmit beams from a corresponding TRP or base station, e.g., SSBs 1-5 are associated with TRPs 611 and 614. Additionally, SSBs 6-10 are associated with TRPs 612 and 615, while SSBs 11-15 are associated with TRPs 613 and 616.

[0077] Further, each SSB can be associated with a number of properties. As Figure 6 shown, some SSBs in different SSB groups can be similar and / or associated with the same properties. For example, in Figure 6 , SSB 2, SSB 7, and SSB 12 in SSB groups 1, 2, and 3, respectively, can be similar and / or associated with the same properties. Further, these SSBs can be associated with similar beams in their respective TRPs. As such, SSB 2, SSB 7, and SSB 12 can be associated with similar beams in TRPs 611, 612, and 613, respectively. Based on this, when UE 602 moves from TRP 611 to TRP 612 to TRP 613, UE 602 can utilize beams corresponding to SSB 2, SSB 7, and SSB 12. Further, as UE 602 moves from TRP 614 to TRP 615 to TRP 616, UE 602 can utilize beams corresponding to SSB 2, SSB 7, and SSB 12, respectively.

[0078] Attribute #1 Attribute #2 Attribute #3 Attribute #4 Attribute #5 SSB Set #1 SSB #1 SSB #2 SSB #3 SSB #4 SSB #5 SSB Set #2 SSB #6 SSB #7 SSB #8 SSB #9 SSB #10 SSB Set #3 SSB #11 SSB #12 SSB #13 SSB #14 SSB #15

[0079] Table 1

[0080] As shown in Table 1 above, each SSB group can include multiple properties associated with respective SSBs, such as properties 1-5. Further, some SSBs can be associated with the same properties as other SSBs. For example, SSB group 1 can include SSB 1 associated with property 1, SSB 2 associated with property 2, SSB 3 associated with property 3, SSB 4 associated with property 4, and SSB 5 associated with property 5. Further, SSB group 2 can include SSB 6 associated with property 1, SSB 7 associated with property 2, SSB 8 associated with property 3, SSB 9 associated with property 4, and SSB 10 associated with property 5. Further, SSB group 3 can include SSB 11 associated with property 1, SSB 12 associated with property 2, SSB 13 associated with property 3, SSB 14 associated with property 4, and SSB 15 associated with property 5.

[0081] As shown in Table 1 above, SSBs 1, 6, and 11 can be associated with the same property, such as property 1. Further, SSBs 2, 7, and 12 can be associated with property 2. SSBs 3, 8, and 13 can be associated with property 3. And SSBs 4, 9, and 14 can be associated with property 4. Further, SSBs 5, 10, and 15 can be associated with property 5. Based on this, a UE can assume that the same beam of similar SSBs (e.g., SSBs 2, 7, and 12) can be used for PDSCH decoding.

[0082] Further, if the TCI information in PDSCH or PDCCH indicates that it is quasi co-located with certain SSBs (e.g., SSB 2, SSB 7, or SSB 12), the UE can assume that the same analog Rx beam can be used for PDSCH or PDCCH. Accordingly, the analog Rx beam used for PDSCH or PDCCH that is quasi co-located with SSB 2 is the same as the analog Rx beam used for PDSCH or PDCCH that is quasi co-located with SSB 7, which is the same as the analog Rx beam used for PDSCH or PDCCH that is quasi co-located with SSB 12.

[0083] In some aspects, if the UE has determined a best analog Rx beam for SSB 2, but it has not determined a best analog Rx beam for SSB 7 and SSB 12, the UE can use the best analog Rx beam for SSB 2 to decode a PDSCH or PDCCH that is quasi co-located with SSB 7 or SSB 12. Thus, if a TRP or base station transmits a PDSCH to the UE, the TRP or base station can indicate that the analog beam of the PDSCH is associated with a certain SSB (e.g., SSB 2). The UE can then determine the best analog beam associated with the SSB (e.g., SSB 2) to decode the PDSCH. Accordingly, the UE can determine a best beam for a certain SSB to decode a PDSCH, and it can use that beam to decode a PDSCH that is quasi co-located with the corresponding SSB.

[0084] In some cases, the UE can determine a best analog Rx beam by considering a group of SSBs (e.g., SSB 2, SSB 7, and SSB 12) jointly, so the UE can not consider a certain SSB independently. In this way, the UE can determine a beam to decode a PDSCH based on the group SSB consideration. By doing so, after considering the group of SSBs jointly, the UE can use the same beam for multiple SSBs. And the UE can perform a beam sweep for one SSB (e.g., SSB 2), and then perform a beam sweep for the corresponding SSBs (e.g., SSB 7 and SSB 12). This can be helpful in cases where the UE is moving fast, because a beam sweep can take a long period of time, so the UE can not have enough time to perform a beam sweep for multiple SSBs. Thus the UE can use the same beam sweep procedure for multiple TRPs.

[0085] Figure 7 is a diagram 700 illustrating example communications between a UE 702 and a base station or TRP 704. At 710, the base station 704 can determine SSB grouping information associated with one or more groups of SSBs. At 720, the base station 704 can transmit the SSB grouping information associated with the one or more groups of SSBs, e.g., SSB grouping information 724, where each of the one or more groups of SSBs can include one or more TRPs. At 722, the UE 702 can receive the SSB grouping information associated with the one or more groups of SSBs, e.g., SSB grouping information 724, where each of the one or more groups of SSBs can include one or more TRPs.

[0086] At 730, the base station 704 can transmit at least one of TCI information or QCL information, e.g., TCI information or QCL information 734, where each of the TCI information and the QCL information can indicate an SSB of the one or more SSB groups that is associated with a downlink Tx beam for downlink data or an uplink Rx beam for uplink data. At 732, the UE 702 can receive at least one of TCI information or QCL information, e.g., TCI information or QCL information 734, where each of the TCI information and the QCL information can indicate an SSB of the one or more SSB groups that is associated with a downlink Tx beam for downlink data or an uplink Rx beam for uplink data. In some aspects, the TCI information can be associated with one or more TCIs, where each of the one or more TCIs can correspond to at least one of a QCL type or an SSB, where the TCI information can indicate the SSB that is associated with the downlink Tx beam or the uplink Rx beam. Based on 722 and 732, the UE can determine whether the TRPs are the same or different.

[0087] In some aspects, each of the one or more SSB groups can include a plurality of SSBs. Further, each of the plurality of SSBs in the one or more SSB groups can be associated with an SSB property. In some cases, the SSB property associated with the plurality of SSBs in one of the one or more SSB groups can be equivalent to the SSB property associated with the plurality of SSBs in each of the one or more SSB groups. Further, one of the SSB properties associated with one of the plurality of SSBs can be a Tx beam pattern of the SSB.

[0088] At 740, the UE 702 can select at least one Rx beam or Tx beam for communication based on at least one SSB property associated with at least one of the plurality of SSBs. In some aspects, the at least one Rx beam or Tx beam can be selected based on the SSB property associated with the SSBs in one of the one or more SSB groups, or based on the SSB property associated with the plurality of SSBs in each of the one or more SSB groups. At 742, the UE 702 can determine whether to communicate downlink data from or to the TRPs in a same one of the one or more SSB groups or the TRPs in different ones of the one or more SSB groups based on at least one of SSB grouping information, TCI information, or QCL information.

[0089] At 750, the UE 702 can perform a Doppler shift estimation for the at least one downlink Tx-Rx beam pair, where downlink data can be communicated from the TRPs in the same SSB group or the TRPs in different SSB groups based on the Doppler shift estimation. In some aspects, the Doppler shift estimation can be performed separately for each of the at least one downlink Tx-Rx beam pair when downlink data is communicated from the TRPs in different SSB groups. At 760, the UE 702 can identify at least one of one or more TA parameters or one or more PC parameters for the at least one Tx beam, where uplink data can be communicated to the TRPs in the same SSB group or the TRPs in different SSB groups based on the at least one of the one or more TA parameters or the one or more PC parameters. In some aspects, the at least one of the one or more TA parameters or the one or more PC parameters can be identified separately for each of the at least one Tx beam when uplink data is communicated to the TRPs in different SSB groups. Based on the determination of whether the TRPs are the same or different, the UE can determine how to perform 750 and 760, e.g., jointly for the same TRPs or separately for different TRPs.

[0090] At 770, the base station 704 can encode downlink data transmitted to at least one UE (e.g., UE 702) based on at least one of SSB grouping information, TCI information, or QCL information.

[0091] At 780, the base station 704 can transmit downlink data to or receive uplink data from the at least one UE (e.g., UE 702) based on the at least one of the SSB grouping information, the TCI information, or the QCL information, for example, downlink data or uplink data 784. The base station 704 can also transmit downlink data to or receive uplink data from the at least one UE based on the at least one of the SSB grouping information, the TCI information, or the QCL information, for example, downlink data or uplink data 784. At 782, the UE 702 can transmit downlink data to or receive uplink data from the TRPs in the same SSB group of the one or more SSB groups or the TRPs in different SSB groups of the one or more SSB groups based on the at least one of the SSB grouping information, the TCI information, or the QCL information, for example, downlink data or uplink data 784. The UE 702 can also receive downlink data from or transmit uplink data to the TRPs in the same SSB group of the one or more SSB groups or the TRPs in different SSB groups of the one or more SSB groups based on the at least one of the SSB grouping information, the TCI information, or the QCL information, for example, downlink data or uplink data 784.

[0092] At 790, the UE 702 can decode downlink data received from the TRPs in the same SSB group of the one or more SSB groups or the TRPs in different SSB groups of the one or more SSB groups based on the at least one of the SSB grouping information, the TCI information, or the QCL information. In some aspects, the SSB grouping information can be received via system information (SI) or radio resource control (RRC) signaling. Further, the at least one of the TCI information or the QCL information can be received via downlink control information (DCI). In some cases, the downlink data can be transmitted via a PDSCH or a PDCCH, and the uplink data can be transmitted via a PUSCH or a PUCCH.

[0093] Figure 8is a flowchart 800 of a wireless communication method. The method can be performed by a UE or a component of a UE (e.g., the UE 104, 350, 702; the apparatus 1002; the processing system, which can include the memory 360 and which can be the entire UE or a component of the UE, such as the TX processor 368, the RX processor 356, and / or the controller / processor 359). Optional aspects are illustrated with a dashed line. The methods described herein can provide a number of benefits, such as improved communication signaling, resource utilization, and / or power savings.

[0094] At 802, the UE can receive SSB grouping information associated with one or more SSB groups, where each of the one or more SSB groups can include one or more TRPs, as described in connection with Figures 4A-7 At 802, the UE can receive SSB grouping information associated with one or more SSB groups, where each of the one or more SSB groups can include one or more TRPs, as described in connection with Figure 7 At 802, the UE can receive SSB grouping information associated with one or more SSB groups, where each of the one or more SSB groups can include one or more TRPs, as described in connection with Figure 6 At 802, the UE can receive SSB grouping information associated with one or more SSB groups, where each of the one or more SSB groups can include one or more TRPs, as described in connection with Figure 10 At 802, the UE can receive SSB grouping information associated with one or more SSB groups, where each of the one or more SSB groups can include one or more TRPs, as described in connection with

[0095] At 804, the UE can receive at least one of TCI information or QCL information, where each of the TCI information and the QCL information can indicate an SSB of the one or more SSB groups associated with a downlink Tx beam for downlink data or an uplink Rx beam for uplink data, as described in connection with Figures 4A-7 At 804, the UE can receive at least one of TCI information or QCL information, where each of the TCI information and the QCL information can indicate an SSB of the one or more SSB groups associated with a downlink Tx beam for downlink data or an uplink Rx beam for uplink data, as described in connection with Figure 7 At 804, the UE can receive at least one of TCI information or QCL information, where each of the TCI information and the QCL information can indicate an SSB of the one or more SSB groups associated with a downlink Tx beam for downlink data or an uplink Rx beam for uplink data, as described in connection with Figure 10 At 804, the UE can receive at least one of TCI information or QCL information, where each of the TCI information and the QCL information can indicate an SSB of the one or more SSB groups associated with a downlink Tx beam for downlink data or an uplink Rx beam for uplink data, as described in connection with Figures 4A-7 At 804, the UE can receive at least one of TCI information or QCL information, where each of the TCI information and the QCL information can indicate an SSB of the one or more SSB groups associated with a downlink Tx beam for downlink data or an uplink Rx beam for uplink data, as described in connection with

[0096] In some aspects, each of the one or more SSB groups can include a plurality of SSBs. Further, each SSB of the plurality of SSBs of the one or more SSB groups can be associated with an SSB property, as described in connection with Figures 4A-7described in connection with the examples of Figures 4A-7 described in connection with the examples of Figures 4A-7 described in connection with the examples of

[0097] At 806, the UE can select at least one Rx beam or Tx beam for communication based on at least one SSB property associated with at least one of the plurality of SSBs, as described in connection with the examples of Figures 4A-7 described in connection with the examples of Figure 7 described in connection with the examples of Figure 10 described in connection with the examples of Figures 4A-7 described in connection with the examples of

[0098] At 808, the UE can determine whether to transmit downlink data from or to TRPs in a same one of the one or more SSB groups or in different ones of the one or more SSB groups based on at least one of SSB grouping information, TCI information, or QCL information, as described in connection with the examples of Figures 4A-7 described in connection with the examples of Figure 7 described in connection with the examples of Figure 10 described in connection with the examples of

[0099] At 810, the UE can perform a Doppler shift estimation for the at least one downlink Tx-Rx beam pair, where the downlink data can be communicated from the TRPs in the same SSB group or the TRPs in different SSB groups based on the Doppler shift estimation, as described in connection with the examples in Figures 4A-7 At 810, the UE can perform a Doppler shift estimation for the at least one downlink Tx-Rx beam pair, where the downlink data can be communicated from the TRPs in the same SSB group or the TRPs in different SSB groups based on the Doppler shift estimation, as described in connection with the examples in Figure 7 At 810, the UE can perform a Doppler shift estimation for the at least one downlink Tx-Rx beam pair, where the downlink data can be communicated from the TRPs in the same SSB group or the TRPs in different SSB groups based on the Doppler shift estimation, as described in connection with the examples in Figure 10 At 810, the UE can perform a Doppler shift estimation for the at least one downlink Tx-Rx beam pair, where the downlink data can be communicated from the TRPs in the same SSB group or the TRPs in different SSB groups based on the Doppler shift estimation, as described in connection with the examples in Figures 4A-7 At 810, the UE can perform a Doppler shift estimation for the at least one downlink Tx-Rx beam pair, where the downlink data can be communicated from the TRPs in the same SSB group or the TRPs in different SSB groups based on the Doppler shift estimation, as described in connection with the examples in

[0100] At 812, the UE can identify at least one of one or more TA parameters or one or more PC parameters for the at least one Tx beam, where the uplink data can be communicated to the TRPs in the same SSB group or the TRPs in different SSB groups based on the at least one of the one or more TA parameters or the one or more PC parameters, as described in connection with the examples in Figures 4A-7 At 812, the UE can identify at least one of one or more TA parameters or one or more PC parameters for the at least one Tx beam, where the uplink data can be communicated to the TRPs in the same SSB group or the TRPs in different SSB groups based on the at least one of the one or more TA parameters or the one or more PC parameters, as described in connection with the examples in Figure 7 At 812, the UE can identify at least one of one or more TA parameters or one or more PC parameters for the at least one Tx beam, where the uplink data can be communicated to the TRPs in the same SSB group or the TRPs in different SSB groups based on the at least one of the one or more TA parameters or the one or more PC parameters, as described in connection with the examples in Figure 10 At 812, the UE can identify at least one of one or more TA parameters or one or more PC parameters for the at least one Tx beam, where the uplink data can be communicated to the TRPs in the same SSB group or the TRPs in different SSB groups based on the at least one of the one or more TA parameters or the one or more PC parameters, as described in connection with the examples in Figures 4A-7 At 812, the UE can identify at least one of one or more TA parameters or one or more PC parameters for the at least one Tx beam, where the uplink data can be communicated to the TRPs in the same SSB group or the TRPs in different SSB groups based on the at least one of the one or more TA parameters or the one or more PC parameters, as described in connection with the examples in

[0101] At 814, the UE can communicate downlink data from the TRPs in the same SSB group of the one or more SSB groups or the TRPs in different SSB groups of the one or more SSB groups, or communicate uplink data to the TRPs in the same SSB group of the one or more SSB groups or the TRPs in different SSB groups of the one or more SSB groups based on at least one of SSB grouping information, TCI information, or QCL information, as described in connection with the examples in Figures 4A-7 At 814, the UE can communicate downlink data from the TRPs in the same SSB group of the one or more SSB groups or the TRPs in different SSB groups of the one or more SSB groups, or communicate uplink data to the TRPs in the same SSB group of the one or more SSB groups or the TRPs in different SSB groups of the one or more SSB groups based on at least one of SSB grouping information, TCI information, or QCL information, as described in connection with the examples in Figure 7As described in 782 of , the UE 702 may transmit downlink data from a TRP in the same SSB group among one or more SSB groups or a TRP in a different SSB group among one or more SSB groups, or transmit uplink data to a TRP in the same SSB group among one or more SSB groups or a TRP in a different SSB group among one or more SSB groups based on at least one of the SSB grouping information, the TCI information, or the QCL information. In addition, 814 may be performed by Figure 10 The UE may also receive downlink data from a TRP in the same SSB group of one or more SSB groups or a TRP in a different SSB group of one or more SSB groups, or transmit uplink data to a TRP in the same SSB group of one or more SSB groups or a TRP in a different SSB group of one or more SSB groups based on at least one of the SSB grouping information, the TCI information, or the QCL information, as described in conjunction with Figures 4A-7 As described in the examples.

[0102] At 816, the UE may decode downlink data received from a TRP in the same SSB group of one or more SSB groups or a TRP in a different SSB group of one or more SSB groups based on at least one of the SSB grouping information, the TCI information, or the QCL information, as combined with Figures 4A-7 For example, as described in the example Figure 7 As described in 790 of , UE 702 may decode downlink data received from TRPs in the same SSB group of one or more SSB groups or TRPs in different SSB groups of one or more SSB groups based on at least one of SSB grouping information, TCI information, or QCL information. In addition, 816 may be performed by Figure 10 In some aspects, the SSB grouping information may be received via system information (SI) or radio resource control (RRC) signaling, such as in conjunction with Figures 4A-7 In addition, at least one of the TCI information or the QCL information may be received via downlink control information (DCI), as described in conjunction with Figures 4A-7 In some cases, downlink data may be transmitted via PDSCH or PDCCH, and uplink data may be transmitted via PUSCH or PUCCH, as described in conjunction with Figures 4A-7 As described in the examples.

[0103] Figure 9is a flowchart 900 of a method of wireless communication. The method can be performed by a base station or TRP or a component of a base station or TRP (e.g., the base station 102, 310, 704; the apparatus 1102; a processing system, which can include the memory 376 and can be the entire base station or a component of the base station as the TX processor 316, the RX processor 370, and / or the controller / processor 375). Optional aspects are illustrated with a dashed line. The methods described herein can provide a number of benefits, such as improved communication signaling, resource utilization, and / or power savings.

[0104] At 902, the base station or TRP can determine SSB grouping information associated with one or more SSB groups, as described in connection with the examples in Figures 4A-7 FIG. 7. For example, as described in 710 of Figure 7 FIG. 7, the base station 704 can determine SSB grouping information associated with one or more SSB groups. As shown in Figure 6 FIG. 7, the SSB groups can correspond to any of the SSB groups 1-3 associated with the TRPs 611-616. Further, 902 can be performed by the determination component 1140 of Figure 11 FIG. 11.

[0105] At 904, the base station can transmit the SSB grouping information associated with the one or more SSB groups, where each of the one or more SSB groups can include one or more TRPs, as described in connection with the examples in Figures 4A-7 FIG. 7. For example, as described in 720 of Figure 7 FIG. 7, the base station 704 can transmit, to the UE 702, the SSB grouping information 724 associated with the one or more SSB groups. Further, 904 can be performed by the determination component 1140 of Figure 11 FIG. 11.

[0106] At 906, the base station can transmit at least one of TCI information or QCL information, where each of the TCI information and the QCL information can indicate an SSB of the one or more SSB groups associated with a downlink Tx beam for downlink data or an uplink Rx beam for uplink data, as described in connection with the examples in Figures 4A-7 FIG. 7. For example, as described in 730 of Figure 7 FIG. 7, the base station 704 can transmit, to the UE 702, at least one of TCI information or QCL information 734. Further, 906 can be performed by the determination component 1140 of Figure 11 FIG. 11. In some aspects, the TCI information can be associated with one or more TCIs, where each of the one or more TCIs can correspond to at least one of a QCL type or an SSB, where the TCI information can indicate the SSB associated with the downlink Tx beam or the uplink Rx beam, as described in connection with the examples in Figures 4A-7as described in connection with the examples in

[0107] In some aspects, each of the one or more SSB groups can include a plurality of SSBs, as described in connection with the examples in Figures 4A-7 In some aspects, each of the one or more SSB groups can include a plurality of SSBs, as described in connection with the examples in Figures 4A-7 In some aspects, each of the one or more SSB groups can include a plurality of SSBs, as described in connection with the examples in Figures 4A-7 In some aspects, each of the one or more SSB groups can include a plurality of SSBs, as described in connection with the examples in Figures 4A-7 In some aspects, each of the one or more SSB groups can include a plurality of SSBs, as described in connection with the examples in

[0108] In some aspects, each of the one or more SSB groups can include a plurality of SSBs, as described in connection with the examples in Figures 4A-7 In some aspects, each of the one or more SSB groups can include a plurality of SSBs, as described in connection with the examples in Figures 4A-7 In some aspects, each of the one or more SSB groups can include a plurality of SSBs, as described in connection with the examples in Figures 4A-7 In some aspects, each of the one or more SSB groups can include a plurality of SSBs, as described in connection with the examples in Figures 4A-7 In some aspects, each of the one or more SSB groups can include a plurality of SSBs, as described in connection with the examples in

[0109] At 908, the base station can encode downlink data for transmission to the at least one UE based on at least one of the SSB grouping information, the TCI information, or the QCL information, as described in connection with the examples in Figures 4A-7 At 908, the base station can encode downlink data for transmission to the at least one UE based on at least one of the SSB grouping information, the TCI information, or the QCL information, as described in connection with the examples in Figure 7 At 908, the base station can encode downlink data for transmission to the at least one UE based on at least one of the SSB grouping information, the TCI information, or the QCL information, as described in connection with the examples in Figure 11 At 908, the base station can encode downlink data for transmission to the at least one UE based on at least one of the SSB grouping information, the TCI information, or the QCL information, as described in connection with the examples in

[0110] At 910, the base station may transmit downlink data to at least one UE, or transmit uplink data from at least one UE based on at least one of the SSB grouping information, the TCI information, or the QCL information, as described in conjunction with Figures 4A-7 For example, as described in the example Figure 7 As described in 780 of , the base station 704 may transmit downlink data to at least one UE, or transmit uplink data from at least one UE based on at least one of the SSB grouping information, TCI information, or QCL information. In addition, 910 may be performed by Figure 11 The base station may also transmit downlink data to at least one UE or receive uplink data from at least one UE based on at least one of the SSB grouping information, TCI information, or QCL information, such as in combination with Figures 4A-7 As described in the examples.

[0111] In some aspects, SSB packet information may be transmitted via system information (SI) or radio resource control (RRC) signaling, such as in conjunction with Figures 4A-7 In addition, at least one of the TCI information or the QCL information may be transmitted via downlink control information (DCI), as described in conjunction with Figures 4A-7 In some cases, downlink data may be transmitted via PDSCH or PDCCH, and uplink data may be transmitted via PUSCH or PUCCH, as described in conjunction with Figures 4A-7 As described in the examples.

[0112] Figure 10is a diagram 1000 illustrating an example of a hardware implementation for the apparatus 1002. The apparatus 1002 is a UE and includes a cellular baseband processor 1004 (also referred to as a modem) coupled with a cellular RF transceiver 1022 and one or more subscriber identity modules (SIM) cards 1020, an application processor 1006 coupled with a secure digital (SD) card 1008 and a screen 1010, a Bluetooth module 1012, a wireless local area network (WLAN) module 1014, a Global Positioning System (GPS) module 1016, and a power supply 1018. The cellular baseband processor 1004 communicates with the UE 104 and / or BS 102 / 180 by the cellular RF transceiver 1022. The cellular baseband processor 1004 can include a computer-readable medium / memory. The computer-readable medium / memory can be non-transitory. The cellular baseband processor 1004 is responsible for general processing, including the execution of software stored in the computer-readable medium / memory. The software, when executed by the cellular baseband processor 1004, causes the cellular baseband processor 1004 to perform the various functions described supra. The computer-readable medium / memory can also be used for storing data that is manipulated by the cellular baseband processor 1004 when executing software. The cellular baseband processor 1004 further includes a reception component 1030, a communication manager 1032, and a transmission component 1034. The communication manager 1032 includes the one or more illustrated components. The components of the communication manager 1032 can be stored in the computer-readable medium / memory and / or configured as hardware within the cellular baseband processor 1004. The cellular baseband processor 1004 can be a component of the UE 350 and can include the memory 360 and / or at least one of the TX processor 368, the RX processor 356, and the controller / processor 359. In one configuration, the apparatus 1002 can be a modem chip and include only the baseband processor 1004, while in another configuration, the apparatus 1002 can be an entire UE (e.g., see 350), and include the aforementioned additional modules of the apparatus 1002. Figure 3

[0113] The communication manager 1032 includes a determination component 1040 configured to receive synchronization signal block (SSB) grouping information associated with one or more SSB groups, each of the one or more SSB groups including one or more transmission-reception points (TRPs), e.g., as described in connection with 802 of Figure 8 The determination component 1040 can be further configured to receive at least one of transmission configuration indication (TCI) information or quasi co-location (QCL) information, each of the TCI information and the QCL information indicating an SSB of the one or more SSB groups associated with a downlink transmit (Tx) beam for downlink data or an uplink receive (Rx) beam for uplink data, e.g., as described in connection with 802 of Figure 8 ​The determining component 1040 may also be configured to transmit downlink data from a TRP in the same SSB group of the one or more SSB groups or a TRP in a different SSB group of the one or more SSB groups, or transmit uplink data to a TRP in the same SSB group of the one or more SSB groups or a TRP in a different SSB group of the one or more SSB groups based on at least one of the SSB grouping information, the TCI information, or the QCL information, for example, as described in conjunction with Figure 8 As described in 814.

[0114] The apparatus may include executing the aforementioned Figure 7 and Figure 8 The flowchart of each block of the algorithm is an additional component. Figure 7 and Figure 8 Each block in the flowchart may be performed by a component, and the apparatus may include one or more of these components. These components may be one or more hardware components specifically configured to perform the process / algorithm, or some combination thereof, the one or more hardware components being implemented by a processor configured to perform the process / algorithm, the process / algorithm being stored in a computer-readable medium for implementation by the processor.

[0115] In one configuration, the apparatus 1002, and in particular the cellular baseband processor 1004, includes means for receiving SSB grouping information associated with one or more synchronization signal blocks (SSB) groups, each of the one or more SSB groups including one or more transmit receive points (TRPs); means for receiving at least one of transmission configuration indication (TCI) information or quasi co-location (QCL) information, each of the TCI information and the QCL information indicating an SSB in the one or more SSB groups associated with a downlink transmit (Tx) beam for downlink data or an uplink receive (Rx) beam for uplink data; and means for transmitting downlink data from a TRP in the same SSB group of the one or more SSB groups or a TRP in a different SSB group of the one or more SSB groups, or transmitting uplink data to a TRP in the same SSB group of the one or more SSB groups or a TRP in a different SSB group of the one or more SSB groups, based on at least one of the SSB grouping information, the TCI information, or the QCL information. The aforementioned means may be one or more of the aforementioned components of the apparatus 1002 configured to perform the functions recited by the aforementioned means. As described above, the apparatus 1002 may include the TX processor 368, the RX processor 356, and the controller / processor 359. Thus, in one configuration, the aforementioned components may be the TX processor 368, the RX processor 356, and the controller / processor 359 configured to perform the functions described by the aforementioned components.

[0116] Figure 11 FIG11 is a diagram 1100 illustrating an example of a hardware implementation of an apparatus 1102. Apparatus 1102 is a base station (BS) and includes a baseband unit 1104. Baseband unit 1104 can communicate with UE 104 via a cellular RF transceiver 1122. Baseband unit 1104 may include computer-readable media / memory. Baseband unit 1104 is responsible for general processing, including executing software stored on the computer-readable media / memory. When executed by baseband unit 1104, the software enables baseband unit 1104 to perform the various functions described above. The computer-readable media / memory may also be used to store data manipulated by baseband unit 1104 when executing the software. Baseband unit 1104 also includes a receiving component 1130, a communication manager 1132, and a transmitting component 1134. Communication manager 1132 includes one or more of the components illustrated. Components within communication manager 1132 may be stored in computer-readable media / memory and / or configured as hardware within baseband unit 1104. The baseband unit 1104 may be a component of the BS 310 and may include a memory 376 and / or at least one of the TX processor 316 , the RX processor 370 , and the controller / processor 375 .

[0117] The communication manager 1132 includes a determining component 1140 configured to transmit synchronization signal block (SSB) grouping information associated with one or more SSB groups, each of the one or more SSB groups including one or more TRPs, e.g., as described in conjunction with Figure 9 The determining component 1140 may also be configured to transmit at least one of transmission configuration indication (TCI) information or quasi-co-location (QCL) information, each of the TCI information and the QCL information indicating an SSB in one or more SSB groups associated with a downlink transmit (Tx) beam for downlink data or an uplink receive (Rx) beam for uplink data, for example, as described in conjunction with Figure 9 The determining component 1140 may also be configured to transmit downlink data to at least one user equipment (UE) or transmit uplink data from at least one UE based on at least one of the SSB grouping information, the TCI information, or the QCL information, for example, as described in conjunction with Figure 9 As described in 910.

[0118] The apparatus may include executing the aforementioned Figure 7 and 9 The flowchart of each block of the algorithm is an additional component. Figure 7 and 9Each block of the flowchart illustrations can be performed by a component, and the apparatus can include one or more of those components. The components can be one or more hardware components specifically configured to carry out the stated processes / algorithm, implemented by a processor configured to perform the processes / algorithm stored by a computer-readable medium, or some combination thereof.

[0119] In one configuration, the apparatus 1102, and in particular the baseband unit 1104, includes means for transmitting synchronization signal block (SSB) grouping information associated with one or more SSB groups, each of the one or more SSB groups including one or more TRPs, means for transmitting at least one of transmission configuration indication (TCI) information or quasi co-location (QCL) information, each of the TCI information and the QCL information indicating an SSB of the one or more SSB groups associated with a downlink transmit (Tx) beam for downlink data or an uplink receive (Rx) beam for uplink data, and means for communicating downlink data to at least one user equipment (UE) or communicating uplink data from at least one UE based on at least one of the SSB grouping information, the TCI information, or the QCL information. The aforementioned means can be one or more of the aforementioned components of the apparatus 1102 configured to perform the functions recited by the aforementioned means. As described above, the apparatus 1102 can include the TX processor 316, the RX processor 370, and the controller / processor 375. As such, in one configuration, the aforementioned means can be the TX processor 316, the RX processor 370, and the controller / processor 375 configured to perform the functions recited by the aforementioned means.

[0120] It should be understood that the particular order or hierarchy of blocks in the disclosed process / flow diagrams does not inherently impose a limitation on the sample order or hierarchy. Rather, the disclosed process / flow diagrams can be re-ordered or otherwise re-arranged, and / or some blocks can be omitted or combined, based on the underlying principles of the present disclosure. The various elements of the attached method claims, and the particular, exemplary order or hierarchy of those elements, are thus not to be understood as limitations, but instead as a specification.

[0121] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but is to be accorded the full scope consistent with the language claims, wherein reference to an element in the singular is not intended to mean "one and only one" unless specifically so stated, but rather "one or more." The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any aspect described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects. Unless specifically stated otherwise, the term "some" refers to one or more. Combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of the group consisting of A, B, and C," "one or more of the group consisting of A, B, and C," and "A, B, and / or C or any combination thereof" include number of occurrences of A, B and / or C, and can include multiples of A, multiples of B, or multiples of C. Specifically, combinations such as "at least one of A, B or C," "A, B or C," "at least one of the group consisting of A, B, and C," "one or more of the group consisting of A, B, and C," and "A, B, and / or C or any combination thereof" can be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combination can contain one or more members of A, B or C. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. The words "module," "mechanism," "element," "device" and the like can not be a substitute for the word "means." As such, no claim element is intended to be construed as a means plus function unless the element is expressly recited using the phrase "means for."

[0122] The following aspects are merely illustrative and can be combined with other aspects or teachings described herein without limitation.

[0123] Aspect 1 is a method of wireless communication for a user equipment (UE). The method includes receiving synchronization signal block (SSB) grouping information associated with one or more SSB groups, each of the one or more SSB groups including one or more transmission reception points (TRPs); receiving at least one of transmission configuration indication (TCI) information or quasi co-location (QCL) information, each of the TCI information and the QCL information indicating an SSB of the one or more SSB groups that is associated with a downlink transmit (Tx) beam for downlink data or an uplink receive (Rx) beam for uplink data; and transmitting the downlink data from a TRP of a same SSB group of the one or more SSB groups or a TRP of a different SSB group of the one or more SSB groups, or transmitting the uplink data to the TRP of the same SSB group of the one or more SSB groups or the TRP of the different SSB group of the one or more SSB groups based on at least one of the SSB grouping information, the TCI information, or the QCL information.

[0124] Aspect 2 is the method of Aspect 1, further comprising identifying, for at least one Tx beam, at least one of one or more timing advance (TA) parameters or one or more power control (PC) parameters, wherein the uplink data is transmitted to the TRP of the same SSB group or the TRP of the different SSB group based on the at least one of the one or more TA parameters or the one or more PC parameters.

[0125] Aspect 3 is the method of any of Aspects 1 and 2, wherein the at least one of the one or more TA parameters or the one or more PC parameters is identified separately for each of the at least one Tx beam when the uplink data is transmitted to the TRP of the different SSB group.

[0126] Aspect 4 is the method of any of Aspects 1-3, further comprising determining whether to transmit the downlink data from the TRP of the same SSB group or the TRP of the different SSB group, or to transmit the uplink data to the TRP of the same SSB group or the TRP of the different SSB group based on at least one of the SSB grouping information, the TCI information, or the QCL information.

[0127] Aspect 5 is the method of any of aspects 1 through 4, wherein the communicating downlink data from the TRPs in the same SSB group or the TRPs in different SSB groups or the communicating uplink data to the TRPs in the same SSB group or the TRPs in different SSB groups based on the at least one of the SSB grouping information, the TCI information, or the QCL information further comprises: receiving downlink data from the TRPs in the same SSB group or the TRPs in different SSB groups or transmitting uplink data to the TRPs in the same SSB group or the TRPs in different SSB groups based on the at least one of the SSB grouping information, the TCI information, or the QCL information.

[0128] Aspect 6 is the method of any of aspects 1 through 5, further comprising decoding downlink data received from the TRPs in the same SSB group of the one or more SSB groups or the TRPs in different SSB groups of the one or more SSB groups based on the at least one of the SSB grouping information, the TCI information, or the QCL information.

[0129] Aspect 7 is the method of any of aspects 1 through 6, wherein each of the one or more SSB groups comprises a plurality of SSBs, wherein each of the plurality of SSBs in the one or more SSB groups is associated with an SSB property.

[0130] Aspect 8 is the method of any of aspects 1 through 7, wherein the SSB property associated with the plurality of SSBs in the one of the one or more SSB groups is equivalent to the SSB property associated with the plurality of SSBs in each of the one or more SSB groups.

[0131] Aspect 9 is the method of any of aspects 1 through 8, wherein one of the SSB properties associated with one of the plurality of SSBs is a Tx beam pattern of the SSB.

[0132] Aspect 10 is the method of any of aspects 1 through 9, further comprising selecting at least one Rx beam or Tx beam for communication based on at least one SSB property associated with at least one of the plurality of SSBs, wherein the at least one Rx beam or Tx beam is selected based on the SSB property associated with the SSBs in the one of the one or more SSB groups or based on the SSB property associated with the plurality of SSBs in each of the one or more SSB groups.

[0133] Aspect 11 is the method of any of aspects 1 through 10, wherein the TCI information is associated with one or more TCIs, each of the one or more TCIs corresponding to at least one of a QCL type or an SSB, wherein the TCI information indicates an SSB associated with a downlink Tx beam or an uplink Rx beam.

[0134] Aspect 12 is the method of any of aspects 1-11, further comprising performing a Doppler shift estimation for the at least one downlink Tx-Rx beam pair, wherein the downlink data is communicated from the TRPs in the same SSB group or the TRPs in the different SSB group based on the Doppler shift estimation, wherein the Doppler shift estimation is performed separately for each of the at least one downlink Tx-Rx beam pair when the downlink data is communicated from the TRPs in the different SSB group.

[0135] Aspect 13 is the method of any of aspects 1-12, wherein the SSB grouping information is received via system information (SI) or radio resource control (RRC) signaling.

[0136] Aspect 14 is the method of any of aspects 1-13, wherein at least one of the TCI information or the QCL information is received via downlink control information (DCI).

[0137] Aspect 15 is an apparatus for wireless communication including means for implementing a method of any of aspects 1-14.

[0138] Aspect 16 is an apparatus for wireless communication including at least one processor coupled to a memory, the at least one processor configured to implement a method of any of aspects 1-14.

[0139] Aspect 17 is a computer-readable medium storing computer executable code, where the code when executed by a processor causes the processor to implement a method of any of aspects 1-14.

[0140] Aspect 18 is a method of wireless communication of a base station. The method includes transmitting SSB grouping information associated with one or more synchronization signal block (SSB) groups, each of the one or more SSB groups including one or more TRPs; transmitting at least one of transmission configuration indication (TCI) information or quasi co-location (QCL) information, each of the TCI information and the QCL information indicating an SSB of the one or more SSB groups associated with a downlink transmit (Tx) beam for downlink data or an uplink receive (Rx) beam for uplink data; and communicating downlink data to at least one user equipment (UE) or uplink data from the at least one UE based on at least one of the SSB grouping information, the TCI information, or the QCL information.

[0141] Aspect 19 is the method of aspect 18, wherein the uplink data is communicated from the at least one UE based on one or more timing advance (TA) parameters or one or more power control (PC) parameters of the at least one Tx beam.

[0142] Aspect 20 is the method of any of aspects 18 and 19, further comprising determining SSB grouping information associated with the one or more SSB groups.

[0143] Aspect 21 is the method of any of aspects 18 to 20, wherein transmitting downlink data to the at least one UE or transmitting uplink data from the at least one UE based on at least one of the SSB grouping information, the TCI information, or the QCL information further comprises: transmitting downlink data to the at least one UE or receiving uplink data from the at least one UE based on at least one of the SSB grouping information, the TCI information, or the QCL information.

[0144] Aspect 22 is the method of any of aspects 18 to 21, further comprising encoding downlink data transmitted to the at least one UE based on at least one of the SSB grouping information, the TCI information, or the QCL information.

[0145] Aspect 23 is the method of any of aspects 18 to 22, wherein each of the one or more SSB groups comprises a plurality of SSBs, wherein each of the plurality of SSBs in the one or more SSB groups is associated with an SSB property.

[0146] Aspect 24 is the method of any of aspects 18 to 23, wherein the SSB property associated with the plurality of SSBs in the one of the one or more SSB groups is equivalent to the SSB property associated with the plurality of SSBs in each of the one or more SSB groups.

[0147] Aspect 25 is the method of any of aspects 18 to 24, wherein one of the SSB properties associated with one of the plurality of SSBs is a Tx beam pattern of the SSB.

[0148] Aspect 26 is the method of any of aspects 18 to 25, wherein at least one Rx beam is used for communication based on at least one SSB property associated with at least one of the plurality of SSBs.

[0149] Aspect 27 is the method of any of aspects 18 to 26, wherein at least one Rx beam is used for communication based on the SSB property associated with the SSB in the one of the one or more SSB groups, or based on the SSB property associated with the plurality of SSBs in each of the one or more SSB groups.

[0150] Aspect 28 is the method of any of aspects 18 to 27, wherein the TCI information is associated with one or more TCIs, each of the one or more TCIs corresponding to at least one of a QCL type or an SSB, wherein the TCI information indicates an SSB associated with a downlink Tx beam or an uplink Rx beam.

[0151] Aspect 29 is the method of any of aspects 18 through 28, wherein the downlink data is transmitted to the at least one UE based on a Doppler shift estimate for the at least one downlink Tx-Rx beam pair.

[0152] Aspect 30 is the method of any of aspects 18 through 29, wherein the SSB grouping information is transmitted via system information (SI) or radio resource control (RRC) signaling.

[0153] Aspect 31 is the method of any of aspects 18 through 30, wherein at least one of the TCI information or the QCL information is transmitted via downlink control information (DCI).

[0154] Aspect 32 is an apparatus for wireless communication, comprising means for implementing a method as in any of aspects 18 through 31.

[0155] Aspect 33 is an apparatus for wireless communication, comprising at least one processor coupled to a memory, the at least one processor configured to implement a method as in any of aspects 18 through 31.

[0156] Aspect 34 is a computer-readable medium storing computer executable code, where the code when executed by a processor causes the processor to implement a method of any of aspects 18 through 31.

Claims

1. A method for wireless communication of a user equipment (UE), comprising: receiving SSB grouping information associated with one or more synchronization signal block (SSB) groups, each of the one or more SSB groups including one or more transmit-receive points (TRPs), wherein each of the one or more SSB groups includes a plurality of SSBs, and each of the plurality of SSBs is associated with a corresponding SSB attribute; receiving at least one of transmission configuration indication (TCI) information or quasi-co-location (QCL) information, each of the TCI information and the QCL information indicating an SSB associated with a downlink transmit (Tx) beam for downlink data or an uplink receive (Rx) beam for uplink data in the one or more SSB groups; selecting at least one Rx beam or Tx beam for communication based on at least one SSB attribute associated with at least one SSB of the plurality of SSBs, wherein the at least one Rx beam or Tx beam is selected based on a first SSB attribute associated with a first SSB in one of the one or more SSB groups or based on a second SSB attribute associated with the plurality of SSBs in each of the one or more SSB groups; and Based on at least one of the SSB grouping information, the TCI information or the QCL information, downlink data is transmitted from a TRP in the same SSB group among the one or more SSB groups or a TRP in a different SSB group among the one or more SSB groups, or uplink data is transmitted to a TRP in the same SSB group among the one or more SSB groups or a TRP in a different SSB group among the one or more SSB groups.

2. The method according to claim 1, further comprising: Identify at least one of one or more timing advance TA parameters or one or more power control PC parameters for at least one Tx beam, wherein the uplink data is transmitted to the TRP in the same SSB group or the TRP in the different SSB group based on the one or more TA parameters or at least one of the one or more PC parameters.

3. The method according to claim 2, wherein: When transmitting the uplink data to the TRP in the different SSB groups, at least one of the one or more TA parameters or the one or more PC parameters is individually identified for each of the at least one Tx beam.

4. The method according to claim 1, further comprising: Based on at least one of the SSB grouping information, the TCI information or the QCL information, determine whether to transmit the downlink data from the TRP in the same SSB group or the TRP in the different SSB group, or to transmit the uplink data to the TRP in the same SSB group or the TRP in the different SSB group.

5. The method according to claim 1, wherein Transmitting downlink data from the TRP in the same SSB group or the TRP in the different SSB group, or transmitting uplink data to the TRP in the same SSB group or the TRP in the different SSB group based on at least one of the SSB grouping information, the TCI information, or the QCL information further includes: Based on at least one of the SSB grouping information, the TCI information or the QCL information, downlink data is received from the TRP in the same SSB group or the TRP in the different SSB group, or uplink data is transmitted to the TRP in the same SSB group or the TRP in the different SSB group.

6. The method according to claim 5, further comprising: Based on at least one of the SSB grouping information, the TCI information or the QCL information, downlink data received from the TRP in the same SSB group of the one or more SSB groups or the TRP in the different SSB groups of the one or more SSB groups is decoded.

7. The method according to claim 1, wherein The SSB attributes associated with the plurality of SSBs in one of the one or more SSB groups are equivalent to the SSB attributes associated with the plurality of SSBs in each of the one or more SSB groups.

8. The method according to claim 1, wherein The SSB property associated with one of the plurality of SSBs is a Tx beam pattern of the SSB.

9. The method according to claim 1, wherein The TCI information is associated with one or more TCIs, each of the one or more TCIs corresponds to at least one of a QCL type or one of the multiple SSBs, wherein the TCI information indicates the SSB associated with the downlink Tx beam or the uplink Rx beam.

10. The method according to claim 1, further comprising: Doppler shift estimation is performed on at least one downlink Tx-Rx beam pair, wherein downlink data is transmitted from a TRP in the same SSB group or a TRP in a different SSB group based on the Doppler shift estimation, wherein when the downlink data is transmitted from the TRP in the different SSB groups, the Doppler shift estimation is performed separately for each of the at least one downlink Tx-Rx beam pair.

11. The method according to claim 1, wherein The SSB group information is received via system information SI or radio resource control RRC signaling.

12. The method according to claim 1, wherein At least one of the TCI information or the QCL information is received via downlink control information DCI.

13. An apparatus for wireless communication of a user equipment (UE), comprising: Memory; and at least one processor coupled to the memory and configured to: receiving SSB grouping information associated with one or more synchronization signal block (SSB) groups, each of the one or more SSB groups including one or more transmit-receive points (TRPs), wherein each of the one or more SSB groups includes a plurality of SSBs, and each of the plurality of SSBs is associated with a corresponding SSB attribute; receiving at least one of transmission configuration indication (TCI) information or quasi-co-location (QCL) information, each of the TCI information and the QCL information indicating an SSB associated with a downlink transmit (Tx) beam for downlink data or an uplink receive (Rx) beam for uplink data in the one or more SSB groups; selecting at least one Rx beam or Tx beam for communication based on at least one SSB attribute associated with at least one SSB of the plurality of SSBs, wherein the at least one Rx beam or Tx beam is selected based on a first SSB attribute associated with a first SSB in one of the one or more SSB groups or based on a second SSB attribute associated with the plurality of SSBs in each of the one or more SSB groups; and Based on at least one of the SSB grouping information, the TCI information or the QCL information, the downlink data is transmitted from a TRP in the same SSB group among the one or more SSB groups or a TRP in a different SSB group among the one or more SSB groups, or the uplink data is transmitted to a TRP in the same SSB group among the one or more SSB groups or a TRP in a different SSB group among the one or more SSB groups.

14. A method for wireless communication of a base station, the base station being a transmit-receive point (TRP), comprising: transmitting SSB grouping information associated with one or more synchronization signal block (SSB) groups, each of the one or more SSB groups including one or more TRPs, wherein each of the one or more SSB groups includes a plurality of SSBs, and each of the plurality of SSBs in the one or more SSB groups is associated with a corresponding SSB attribute; transmitting at least one of transmission configuration indication TCI information or quasi-co-location QCL information, each of the TCI information and the QCL information indicating an SSB associated with a downlink transmit Tx beam for downlink data or an uplink receive Rx beam for uplink data in the one or more SSB groups; and Based on at least one of the SSB grouping information, the TCI information or the QCL information, the downlink data is transmitted to at least one user equipment UE, or the uplink data is transmitted from at least one UE, wherein at least one Rx beam or Tx beam is used for communication based on a first SSB attribute associated with a first SSB in one of the one or more SSB groups or based on a second SSB attribute associated with the multiple SSBs in each of the one or more SSB groups.

15. The method according to claim 14, wherein The uplink data is transmitted from the at least one UE based on one or more timing advance (TA) parameters or one or more power control (PC) parameters for at least one Tx beam.

16. The method according to claim 14, further comprising: Determine SSB grouping information associated with the one or more SSB groups.

17. The method according to claim 14, wherein: Transmitting downlink data to the at least one UE or transmitting uplink data from the at least one UE based on at least one of the SSB grouping information, the TCI information, or the QCL information further includes: Based on at least one of the SSB grouping information, the TCI information, or the QCL information, the downlink data is transmitted to the at least one UE, or the uplink data is received from the at least one UE.

18. The method according to claim 17, further comprising: Downlink data transmitted to the at least one UE is encoded based on at least one of the SSB grouping information, the TCI information, or the QCL information.

19. The method according to claim 14, wherein The SSB attributes associated with the plurality of SSBs in one of the one or more SSB groups are identical to the SSB attributes associated with the plurality of SSBs in each of the one or more SSB groups.

20. The method according to claim 14, wherein One of the SSB properties associated with one of the plurality of SSBs is a Tx beam pattern of the SSB.

21. The method according to claim 14, wherein The TCI information is associated with one or more TCIs, each of the one or more TCIs corresponds to at least one of a QCL type or one of the multiple SSBs, wherein the TCI information indicates the SSB associated with the downlink Tx beam or the uplink Rx beam.

22. The method according to claim 14, wherein The downlink data is transmitted to the at least one UE based on a Doppler shift estimate for at least one downlink Tx-Rx beam pair.

23. The method according to claim 14, wherein the SSB group information is transmitted via system information (SI) or radio resource control (RRC) signaling.

24. The method according to claim 14, wherein At least one of the TCI information or the QCL information is transmitted via downlink control information DCI.

25. An apparatus for wireless communication of a base station, the base station being a transmit-receive point (TRP), the apparatus comprising: Memory; and at least one processor coupled to the memory and configured to: transmitting SSB grouping information associated with one or more synchronization signal block (SSB) groups, each of the one or more SSB groups including one or more TRPs, wherein each of the one or more SSB groups includes a plurality of SSBs, and each of the plurality of SSBs in the one or more SSB groups is associated with a corresponding SSB attribute; transmitting at least one of transmission configuration indication TCI information or quasi-co-location QCL information, each of the TCI information and the QCL information indicating an SSB associated with a downlink transmit Tx beam for downlink data or an uplink receive Rx beam for uplink data in the one or more SSB groups; and Based on at least one of the SSB grouping information, the TCI information or the QCL information, the downlink data is transmitted to at least one user equipment UE, or the uplink data is transmitted from at least one UE, wherein at least one Rx beam or Tx beam is used for communication based on a first SSB attribute associated with a first SSB in one of the one or more SSB groups or based on a second SSB attribute associated with the multiple SSBs in each of the one or more SSB groups.

26. A computer-readable medium storing code for wireless communication at a user equipment, wherein the code is executable by one or more processors of the user equipment to cause the one or more processors to perform the method of any one of claims 1-12.

27. A computer-readable medium storing code for wireless communication at a base station, wherein: The code is executable by one or more processors of the base station to cause the one or more processors to perform the method according to any one of claims 14 to 24.

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