TW202332311A - Method and apparatus for multi-trp beam management - Google Patents

Abstract

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE receives one or more configurations indicating a plurality of groups of resources allocated to a plurality of TRPs, respectively. The UE receives an activation configuration for activating a number of sets of TCI states. Each set of the number of sets includes one or more TCI states each assigned to a respective one of the plurality of TRPs. The UE activates the number of sets of TCI states.

Description

Method and apparatus for multi-TRP beam management

The present invention generally relates to communication systems, and more particularly, to techniques for activating a Transmission Configuration Indication (TCI) state at a user equipment (UE).

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging and broadcast. Typical wireless communication systems may employ multiple access techniques capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple access techniques 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) system, single-carrier frequency division multiple access (SC-FDMA) system and time division synchronous code division multiple access (time division synchronous code division multiple access, TD-SCDMA) system.

These multiple access technologies have been adopted in various telecommunications standards to provide common protocols that enable different wireless devices to communicate on municipal, national, regional, and even global levels. An example telecommunications standard is 5G New Radio (NR). 5G NR is part of the continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP), aiming to meet the requirements of latency, reliability, security, scalability (e.g., Internet of Things (IoT) Things, IoT)) and other requirements related to new requirements. Certain aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. 5G NR technology needs further improvement. These improvements may also be applicable to other multiple access technologies and the telecommunication standards that employ them.

A simplified summary of one or more aspects is presented below in order to provide a basic understanding of these 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.

In one aspect of the invention, a method, a computer readable medium and an apparatus are provided. The UE receives one or a plurality of configurations, which indicate a plurality of resource groups respectively allocated to a plurality of transmission and reception points (transmission and reception point, TRP). The UE receives activation configurations for activating multiple sets of transmission configuration indication (transmission configuration indication, TCI) states. Each of the groups includes one or a plurality of TCI states, each TCI state being assigned to a corresponding one of the plurality of TRPs. The UE activates multiple sets of TCI states.

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

The detailed description set forth below in connection with the drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the inventively described concepts may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. It will be apparent, however, to one of ordinary skill in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and elements are shown in block diagram form in order to avoid obscuring the concepts.

Several aspects of a telecommunications system 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 drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software or any combination thereof. Whether these elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

For example, an element or any portion of an element or any combination of elements may be implemented as a "processing system" including 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 (reduced instruction set computing, RISC) processor, system on a chip (systems on a chip, SoC), baseband processor, field programmable gate array (field programmable gate array, FPGA), programmable design Programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, and other suitable hardware configured to perform the various functions described throughout this disclosure. One or more processors in the processing system can execute software. Software shall be construed broadly as instructions, instruction sets, code, code fragments, code, programs, subroutines, software components, applications, software applications, packages, routines, subroutines, objects, executable files , execution thread, process, function, etc., whether referring to software, firmware, middleware, microcode, hardware description language, or otherwise.

Thus, in one or more example aspects, the functions described may be implemented in hardware, software or any combination thereof. If implemented in software, the functions may be stored or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media. A storage media may be any available media that can be accessed by a computer. By way of example and not limitation, such computer readable media may include random-access memory (random-access memory, RAM), read-only memory (read-only memory, ROM), electrically erasable programmable ROM ( electrically erasable programmable ROM, EEPROM), optical disk memory, magnetic disk memory, other magnetic storage devices, combinations of the above types of computer-readable media, or computer-executable Any other medium of code.

FIG. 1 is a diagram illustrating an example of a wireless communication system and an access network 100 . A wireless communication system (also called a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (Evolved Packet Core, EPC) 160 and another core network 190 (for example, 5G Core (5G Core, 5GC)). Base stations 102 may include macro cells (high power cellular base stations) and/or small cells (low power cellular base stations). Macro cells include base stations. Small cells include femtocells, picocells, and microcells.

The base station 102 configured for 4G LTE (collectively referred to as the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (Evolved UMTS Terrestrial Radio Access Network, E-UTRAN)) can pass the backhaul link 132 (for example, SI interface) interface with EPC 160. Base stations 102 configured for 5G NR (collectively referred to as Next Generation RAN (NG-RAN)) may interface with a core network 190 via a backhaul link 184 . Base station 102 may perform, among other functions, one or more of the following functions: user data transmission, wireless channel encryption and decryption, integrity protection, header compression, motion control functions (e.g., handover, dual connectivity), small Interference coordination, connection establishment and release, load balancing, non-access stratum (NAS) messaging, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcasting broadcast service (multimedia broadcast multicast service, MBMS), user and device tracking, RAN information management (RAN information management, RIM), paging, positioning and alert message delivery. The base stations 102 can communicate with each other directly or indirectly (eg, through the EPC 160 or the core network 190 ) via the backhaul link 134 (eg, the X2 interface). Backhaul link 134 may be wired or wireless.

Base station 102 can communicate with UE 104 wirelessly. Each of the base stations 102 can provide communication coverage for a corresponding geographic coverage area 110 . Overlapping geographic coverage areas 110 may exist. For example, the small cell 102 ′ may have a coverage area 110 ′ that overlaps the coverage area 110 of one or more macro base stations 102 . A network including small cells and macro cells may be referred to as a heterogeneous network. Heterogeneous networks may also include Home Evolved Node Bs (eNBs) (Home Evolved Node Bs, HeNBs), which may provide services to restricted groups known as closed subscriber groups (CSGs). The communication link 120 between the base station 102 and the UE 104 may include an uplink (UL) (also referred to as a reverse link) transmission from the UE 104 to the base station 102 and/or an uplink (UL) transmission from the base station 102 to the UE. 104 for downlink (downlink, DL) (also referred to as forward link) transmission. Communication link 120 may use multiple-input and multiple-output (MIMO) antenna technologies, including spatial multiplexing, beamforming, and/or transmit diversity. The communication link can be through one or multiple carriers. The base station 102/UE 104 can use spectrum (x component carriers ) for transmission in each direction. Carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric for DL and UL (eg, more or fewer carriers may be allocated for DL than for UL). A component carrier may include a primary component carrier and one or a plurality of secondary component carriers. The primary component carrier may be called a primary cell (PCell) and the secondary component carrier may be called a secondary cell (SCell).

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

The wireless communication system may also include a Wi-Fi access point (AP) 150 communicating with a Wi-Fi station (station, STA) 152 via a communication link 154 in the 5GHz unlicensed spectrum. When communicating in an unlicensed spectrum, the STA 152/AP 150 may perform a clear channel assessment (CCA) prior to communicating to determine whether a channel is available.

Small cells 102' may operate in licensed and/or unlicensed spectrum. Small cell 102 ′ may employ NR and use the same 5 GHz unlicensed spectrum used by Wi-Fi AP 150 when operating in the unlicensed spectrum. Employing NR small cells 102' in the unlicensed spectrum can extend the coverage and/or increase the capacity of the access network.

Base stations 102, whether small cells 102' or large cells (eg, macro base stations), may include eNBs, gNodeBs (gNBs), or other types of base stations. Some base stations, such as gNB 180 , may operate in conventional sub-6 GHz spectrum, millimeter wave (mmW) frequencies, and/or near mmW frequencies in communication with UE 104 . When gNB 180 operates in mmW or near mmW frequencies, gNB 180 may be referred to as a mmW base station. Extremely high frequency (EHF) is the radio frequency portion of the electromagnetic spectrum. EHF ranges from 30 GHz to 300 GHz with wavelengths between 1 mm and 10 mm. Radio waves in this frequency band may be called millimeter waves. Near-millimeter waves may extend down to frequencies of 3 GHz, with wavelengths of 100 millimeters. The super high frequency (SHF) band extends between 3 GHz and 30 GHz, also known as centimeter wave. Communications using millimeter wave/near millimeter wave radio frequency bands (eg, 3 GHz - 300 GHz) have extremely high path loss and short range. The mmW base station 180 can utilize beamforming 182 with the UE 104 to compensate for extremely high path loss and short distance.

The base station 180 may transmit beamformed signals to the UE 104 in one or more transmit directions 108a. The UE 104 may receive beamformed signals from the base station 180 in one or more receive directions 108b. UE 104 may also transmit beamformed signals to base station 180 in one or more transmit directions. The base station 180 can receive beamformed signals from the UE 104 in one or more receive directions. The base stations 180/UE 104 may perform beam training to determine the best receive and transmit directions for each base station 180/UE 104 . The transmit and receive directions of the base station 180 may be the same or different. The transmit and receive directions of UE 104 may be the same or different.

The EPC 160 may include an action management entity (Mobility Management Entity, MME) 162, other MMEs 164, a service gateway 166, a multimedia broadcast multicast service (Multimedia Broadcast Multicast Service, MBMS) gateway 168, a broadcast multicast service center (Broadcast Multicast Service Center (BM-SC) 170, and Packet Data Network (PDN) gateway 172. The MME 162 can communicate with a Home Subscriber Server (HSS) 174 . MME 162 is a control node that handles signaling between UE 104 and EPC 160 . Generally, MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through the service 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. PDN gateway 172 and BM-SC 170 are connected to IP service 176 . The IP service 176 may include Internet, Intranet, IP Multimedia Subsystem (IP Multimedia Subsystem, IMS), PS streaming service and/or other IP services. The BM-SC 170 may provide functions for MBMS user service provisioning and delivery. The BM-SC 170 can be used as an entry point for MBMS transmissions by content providers, can be used to authorize and activate MBMS bearer services in a public land mobile network (PLMN), and can be used to schedule MBMS transmissions. The MBMS gateway 168 can be used to distribute MBMS services to base stations 102 belonging to a broadcast-specific service's Multicast Broadcast Single Frequency Network (MBSFN) area, and can be responsible for session management (start/stop) and Collect charging information related to eMBMS.

The core network 190 may include an access and mobility management function (Access and Mobility Management Function, AMF) 192, other AMFs 193, a location management function (location management function, LMF) 198, a session management function (Session Management Function, SMF) 194 and User Plane Function (UPF) 195 . AMF 192 can communicate with Unified Data Management (UDM) 196 . AMF 192 is a control node that handles signaling between UE 104 and core network 190 . Generally, SMF 194 provides QoS flow and session management. All User Internet Protocol (IP) packets are transmitted through UPF 195. UPF 195 provides UE IP address allocation as well as other functions. UPF 195 connects to IP service 197 . IP services 197 may include Internet, Intranet, IMS, PS streaming services, and/or other IP services.

A base station may also be called gNB, Node B, evolved Node B (evolved Node B, eNB), access point, base station transceiver, radio base station, radio transceiver, transceiver function, basic service set (basic service set) , BSS), extended service set (extended service set, ESS), transmit reception point (transmit reception point, TRP) or some other suitable terminology. Base station 102 provides UE 104 with an access point to EPC 160 or core network 190 . Examples of UE 104 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, Video equipment, digital audio players (such as MP3 players), cameras, game consoles, tablets, smart devices, wearables, vehicles, electric meters, gas pumps, large or small kitchen appliances, healthcare equipment, implants, sensory detector/actuator, display, or any other similarly functional device. Some of UEs 104 may be referred to as IoT devices (eg, parking meters, gas pumps, toasters, vehicles, heart monitors, etc.). UE 104 may also be called a station, mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, Mobile terminal, wireless terminal, remote terminal, mobile phone, user agent, mobile client, client or some other suitable term.

Although the present invention can refer to 5G New Radio (New Radio, NR), the present invention can be applied to other similar fields, such as LTE, Advanced LTE (LTE-Advanced, LTE-A), CDMA, Global System for Mobile Communications (Global System for Mobile communications, GSM) or other wireless/radio access technologies.

FIG. 2 is a block diagram of communication between the base station 210 and the UE 250 in the access network. In DL, IP packets from EPC 160 may be provided to controller/processor 275 . Controller/processor 275 implements layer 3 and layer 2 functions. Layer 3 includes radio resource control (radio resource control, RRC) layer, layer 2 includes packet data convergence protocol (packet data convergence protocol, PDCP) layer, radio link control (radio link control, RLC) layer and media access control ( medium access control, MAC) layer. The controller/processor 275 provides information related to the broadcast system (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification and RRC connection release), radio access technology (radio access technology, RAT) inter-mobility, and RRC layer functions associated with measurement configuration of UE measurement reports; related to header compression/decompression, security (encryption, decryption, integrity protection, integrity verification) and handover support functions PDCP layer functions; transmission of packet data units (PDUs) with upper layers, error correction via ARQ, concatenation of RLC service data units (SDUs), segmentation and reassembly, resegmentation of RLC data PDUs RLC layer functions associated with reordering of segments and RLC data PDUs; mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TB), demultiplexing of MAC SDUs from TBs , scheduling information reporting, error correction via HARQ, prioritization and logical channel prioritization associated MAC layer functions.

A transmit (TX) processor 216 and a receive (RX) processor 270 implement Layer 1 functions associated with various signal processing functions. Layer 1 includes the physical (PHY) layer, which may include error detection on the transmission channel, forward error correction (FEC) encoding/decoding of the transmission channel, interleaving, rate matching, mapping to the physical channel, physical channel Modulation/demodulation and MIMO antenna processing. TX processor 216 is based on various modulation schemes (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), M phase-shift keying ( M-phase-shift keying, M-PSK), M-quadrature amplitude modulation (M-quadrature amplitude modulation, M-QAM)) processing to signal constellation mapping. The encoding and modulation symbols can then be split into parallel streams. Each stream can then be mapped to OFDM subcarriers, multiplexed with a reference signal (e.g., pilot) in the time and/or frequency domain, and then transformed using the Inverse Fast Fourier Transform (IFFT) They are combined to produce physical channels that carry a stream of time-domain OFDM symbols. OFDM streams are spatially precoded to generate a plurality of spatial streams. Channel estimates from channel estimator 274 may be used to determine coding and modulation schemes, as well as for spatial processing. Channel estimates can be derived from reference signals sent by UE 250 and/or channel condition feedback. Each spatial stream may then be provided to a different antenna 220 by a separate transmitter 218 TX. Each transmitter 218 TX may modulate an RF carrier with a corresponding spatial stream for transmission.

At UE 250, each receiver 254 RX receives signals through its respective antenna 252. Each receiver 254 RX recovers the information modulated onto the RF carrier and provides the information to the RX processor 256. TX processor 268 and RX processor 256 implement Layer 1 functions associated with various signal processing functions. RX processor 256 may perform spatial processing on this information to recover any spatial streams destined for UE 250 . If multiple spatial streams are destined for UE 250, they may be combined by RX processor 256 into a single OFDM symbol stream. The RX processor 256 then converts the stream of OFDM symbols 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 and reference signals on each subcarrier are recovered and demodulated by determining the most probable constellation point of the signal transmitted by the base station 210 . These soft decisions may be based on channel estimates computed by channel estimator 258 . The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent by the base station 210 on the physical channel. The data and control signals are then provided to the controller/processor 259, which implements layer 3 and layer 2 functions.

Controller/processor 259 can be associated with memory 260 that stores program codes and data. Memory 260 may be referred to as a computer readable medium. In the UL, the controller/processor 259 provides demultiplexing between transport and logical lanes, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the EPC 160. Controller/processor 259 is also responsible for error detection using ACK and/or NACK protocols to support HARQ operations.

Similar to the functions described in connection with the DL transmission of the base station 210, the controller/processor 259 provides RRC layer functions associated with system information (e.g., MIB, SIB) acquisition, RRC connection and measurement reporting; and header compression/decompression PDCP layer functions related to security (encryption, decryption, integrity protection, integrity verification); transmission of upper layer PDUs, error correction via ARQ, concatenation, segmentation and reassembly of RLC SDUs, re-segmentation of RLC data PDUs and RLC layer functions associated with reordering of RLC data PDUs; mapping between logical channels and transport channels, multiplexing of MAC SDUs to TBs, demultiplexing of MAC SDUs from TBs, reporting of scheduling information, communication via HARQ MAC layer functions associated with error correction, prioritization, and logical channel prioritization.

TX processor 268 may use channel estimates derived from reference signals sent from base station 210 or fed back by channel estimator 258 to select appropriate coding and modulation schemes and facilitate spatial processing. The spatial streams generated by the TX processor 268 may be provided to different antennas 252 via separate transmitters 254TX. Each transmitter 254TX may modulate an RF carrier with a corresponding spatial stream for transmission. UL transmissions are processed at the base station 210 in a manner similar to that described in connection with receiver functionality at the UE 250 . Each receiver 218RX receives signals through its respective antenna 220 . Each receiver 218RX recovers the information modulated onto the RF carrier and provides the information to the RX processor 270 .

Controller/processor 275 can be associated with memory 276 that stores program codes and data. Memory 276 may be referred to as a computer readable medium. In the UL, the controller/processor 275 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE 250 . IP packets from controller/processor 275 may be provided to EPC 160 . Controller/processor 275 is also responsible for error detection using ACK and/or NACK protocols to support HARQ operation.

NR may refer to a network configured according to a new air interface (for example, different from an Orthogonal Frequency Division Multiple Access (OFDMA)-based air interface) or a fixed transport layer (for example, different from an Internet Protocol (Internet Protocol, IP)) operated radios. NR can use OFDM with a cyclic prefix (CP) on the uplink and downlink, and can include support for half-duplex operation using time division duplexing (TDD). NR may include Enhanced Mobile Broadband (eMBB) services for wide bandwidths (eg, over 80 MHz), mmW for high carrier frequencies (eg, 60 GHz), massive MTC for non-backward compatible MTC technologies ( massive MTC (mMTC) and/or mission critical for ultra-reliable low latency communication (URLLC) services.

It can support a single component carrier bandwidth of 100MHz. In one example, an NR resource block (RB) may span 12 subcarriers, each with a subcarrier bandwidth of 60 kHz on a 0.125 ms duration or 15 kHz on a 0.5 ms duration . Each radio frame can consist of 20 or 80 subframes (or NR slots) with a length of 10 ms. Each subframe can indicate a link direction (ie, DL or UL) for data transmission, and the link direction of each subframe can be dynamically switched. Each subframe may include DL/UL data and DL/UL control data. UL and DL subframes for NR may be described in more detail with respect to FIGS. 5-6 below.

The NR RAN may include a central unit (central unit, CU) and a distributed unit (distributed unit, DU). An NR BS (for example, gNB, 5G Node B, Node B, transmission reception point (TRP), access point (access point, AP)) may correspond to one or a plurality of BSs. The NR cell can be configured as an access cell (ACell) or a data only cell (DCell). For example, a RAN (eg, a central unit or a decentralized unit) may configure cells. A DCell may be a cell used for carrier aggregation or dual connectivity, and may not be used for initial access, cell selection/reselection or handover. In some cases, DCell may not send a synchronization signal (SS), and in some cases, DCell may send SS. The NR BS may send a downlink signal indicating the cell type to the UE. Based on the cell type indication, the UE can communicate with the NR BS. For example, the UE may determine NR BSs to consider for cell selection, access, handover, and/or measurement based on the indicated cell type.

Figure 3 illustrates an example logical architecture of a decentralized RAN 300 in accordance with aspects of the present invention. The 5G access node 306 may include an access node controller (access node controller, ANC) 302 . The ANC may be a central unit (CU) of the decentralized RAN. The backhaul interface to the next generation core network (NG-CN) 304 may be terminated at the ANC. The backhaul interface to an adjacent next generation access node (NG-AN) 310 may terminate at the ANC. The ANC may include one or a plurality of TRPs 308 (may also be referred to as BS, NR BS, Node B, 5G NB, AP or some other terminology). As mentioned above, TRP is used interchangeably with "community".

TRP 308 may be a distributed unit (distributed unit, DU). The TRP may be connected to one ANC (ANC 302 ) or to more than one ANC (not shown). For example, for RAN pooling, radio as a service (RaaS), and service-specific ANC deployments, the TRP can connect to multiple ANCs. A TRP can include one or multiple antenna ports. TRPs can be configured to provide services to UEs individually (eg, dynamic selection) or jointly (eg, joint transmission).

The local architecture of the decentralized RAN 300 can be used to illustrate the fronthaul definition. Architectures that support fronthaul solutions across different deployment types can be defined. For example, the architecture may be based on transport network capabilities (eg, bandwidth, latency, and/or jitter). The architecture may share features and/or elements with LTE. According to aspects, NG-AN 310 may support dual connectivity with NR. NG-AN can share a common fronthaul for LTE and NR.

This architecture can realize the cooperation between TRP 308 . For example, cooperation may be preset within and/or across TRPs by ANC 302 . According to various aspects, an inter-TRP interface may not be required/existed.

According to various aspects, dynamic configuration of separate logical functions may exist within the architecture of the distributed RAN 300 . PDCP, RLC, MAC protocols can be adaptively placed at ANC or TRP.

Figure 4 illustrates an example physical architecture of a decentralized RAN 400 in accordance with aspects of the present invention. A centralized core network unit (centralized core network unit, C-CU) 402 may host core network functions. C-CU can be deployed centrally. C-CU functionality may be offloaded (for example, to advanced wireless service (AWS)) in an effort to handle peak capacity. A centralized RAN unit (centralized RAN unit, C-RU) 404 may host one or a plurality of ANC functions. Optionally, the C-RU can host core networking functions locally. C-RUs may have a decentralized deployment. C-RUs may be located closer to the edge of the network. A distributed unit (DU) 406 can host one or a plurality of TRPs. The DU can be located at the edge of the network with radio frequency (RF) capabilities.

FIG. 5 is an example diagram 500 illustrating a DL-centered subframe. A DL-centric subframe may include a control portion 502 . The control portion 502 may exist in the initial or beginning portion of a DL-centered subframe. The control portion 502 may include various scheduling information and/or control information corresponding to portions of the DL-centered subframe. In some configurations, the control part 502 may be a physical DL control channel (PDCCH), as shown in FIG. 5 . A DL-centric subframe may also include a DL material portion 504 . The DL material portion 504 may sometimes be referred to as the payload of a DL-centric subframe. DL data portion 504 may include communication resources for communicating DL data from a scheduling entity (eg, UE or BS) to a dependent entity (eg, UE). In some configurations, the DL data portion 504 may be a physical DL shared channel (PDSCH).

A DL-centric subframe may also include a common UL portion 506 . Common UL portion 506 may sometimes be referred to as a UL burst, a common UL burst, and/or various other suitable terminology. The common UL portion 506 may include feedback information corresponding to various other portions of the DL-centric subframe. For example, common UL portion 506 may include feedback information corresponding to control portion 502 . Non-limiting examples of feedback information may include ACK signals, NACK signals, HARQ indicators, and/or various other suitable types of information. Common UL portion 506 may include additional or alternative information, such as information related to random access channel (RACH) procedures, scheduling requests (SR), and various other suitable types of information.

As shown in FIG. 5 , the end of the DL material portion 504 may be separated in time from the beginning of the common UL portion 506 . This time separation may sometimes be referred to as a gap, guard period, guard interval, and/or various other suitable terms. This separation provides time for a switch-over from DL communication (eg, receive operation of a subordinate entity (eg, UE)) to UL communication (eg, transmission of a subordinate entity (eg, UE)). Those of ordinary skill in the art will understand that the above is only one example of a DL-centric subframe, and that alternative structures with similar characteristics may exist without departing from the described aspects of the invention.

FIG. 6 is an example diagram 600 illustrating a UL-centric subframe. A UL-centric subframe may include a control portion 602 . The control part 602 may exist in the initial or beginning part of a UL-centered subframe. The control portion 602 in FIG. 6 may be similar to the control portion 502 described above with reference to FIG. 5 . A UL-centric subframe may also include a UL profile portion 604 . The UL profile portion 604 may sometimes be referred to as the payload of a UL-centric subframe. The UL portion may refer to communication resources used to transmit UL data from a subordinate entity (eg, UE) to a scheduling entity (eg, UE or BS). In some configurations, the control portion 602 may be a physical DL control channel (PDCCH).

As shown in FIG. 6, the end of the control section 602 may be separated in time from the beginning of the UL material section 604. This time separation may sometimes be referred to as a gap, guard period, guard interval, and/or various other suitable terms. This separation allows time to switch from DL communication (eg, scheduling an entity's receive operation) to UL communication (eg, scheduling an entity's transmission). A UL-centric subframe may also include a common UL portion 606 . Common UL portion 506 of FIG. 6 may be similar to common UL portion 506 described above with reference to FIG. 5 . Common UL portion 606 may additionally or alternatively include information related to channel quality indicators (CQI), sounding reference signals (SRS), and various other suitable types of information. Those of ordinary skill in the art will appreciate that the foregoing is only one example of a UL-centric subframe, and that alternative structures with similar characteristics may exist without departing from the described aspects of the invention.

In some cases, two or more subordinate entities (eg, UEs) can communicate with each other using sidelink signals. Practical applications for such sidelink communications may include public safety, proximity services, UE-to-network relay, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical grids, and/or various other suitable applications. In general, a sidelink signal may refer to a signal transmitted from one subordinate entity (eg, UE1) to another subordinate entity (eg, UE2) without relaying the communication through a scheduling entity (eg, UE or BS), even though the scheduling entity (eg, UE or BS) Process entities can be used for scheduling and/or control purposes. In some examples, licensed spectrum may be used to transmit sidelink signals (unlike WLANs, which typically use unlicensed spectrum).

FIG. 7 is a diagram 700 illustrating the grouping of resource sets for communication between a UE and a base station. In this example, UE 704 is in simultaneous communication with TRPs 712, 714, 716, which may be controlled by base station 702 and/or other base stations. The base station 702 notifies the UE 704 of the selected beam for data transmission using a field called transmission configuration indication (TCI) status. UE 704 may then look up the corresponding beam for reception. The base station 702 configures a TCI state pool 718 for the UE 704 . The TCI state pool 718 includes (Q+1) TCI state configurations from #0 to #Q. Q is an integer, which can be 127. Each TCI state can be identified by an index (for example, #0, #1, ...).

UE 704 is configured with one or more resource sets for transmitting or receiving various reference signals and channels. In this example, UE 704 may be configured with control resource set (control resource set, CORESET) 1-M; channel state information (channel state information, CSI) resource set 1-N; physical uplink control channel (physical uplink control channel, PUCCH) resource set 1–P, etc. M, N, and P are all positive integers.

Base station 702 can group those sets of resources into different groups. In addition, base station 702 can assign each set of resource sets to a TRP and assign a TCI state to the TRP, as described below. The base station 702 may send to the UE 704 one or more indications indicating the grouping of resource sets.

FIG. 8 is a diagram 800 illustrating a first technique for sending an indication of a group indicating a set of resources. In this technique, the configuration of each resource set received by UE 704 may include an indication of the group that the resource set is in. For example, UE 704 may receive RRC configuration 810 configuring a CSI resource set at UE 704 (eg, CSI resource set 1). The RRC configuration 810 includes an indication 814 that the configured CSI resource set (eg, CSI resource set 1 ) is in set 0 . UE 704 may also receive RRC configuration 820, which configures a PUCCH resource set at UE 704 (eg, PUCCH resource set 1). The RRC configuration 820 includes an indication 824 indicating that the configured PUCCH resource set (eg, PUCCH resource set 2) is in Group 1 .

Fig. 9 is a diagram 900 illustrating a second technique for sending an indication of a group indicating a set of resources. In this technique, the measurement configuration received by UE 704 may include one or a plurality of lists, each list indicating a set of resource sets. For example, UE 704 may receive CSI measurement configuration 910 including group list 914 and group list 916 . Each list specifies one or a plurality of CSI resource sets (eg, CSI resource set 1 and CSI resource set 2), which are contained in a corresponding group (eg, group 0).

Returning to FIG. 7, in this example, CORESET 0, CSI resource set 1, CSI resource set 2, PUCCH resource set 1, and PUCCH resource set 3 are included in group 0. CORESET 1, CORESET 2, CSI resource set 3, CSI resource set 5, PUCCH resource set 2, and PUCCH resource set 4 are included in group 1. CORESET 3, CSI resource set 4 and PUCCH resource set 5 are included in group 2.

The base station 702 may send a Medium Access Control (Medium Access Control, MAC) control element (control element, CE) 720 to the UE 704 through one of the TRPs 712, 714, and 716 to activate one or more TCI states of the TCI state pool 718.

FIG. 10 is an example diagram 1000 showing TCI states corresponding to different codepoints activated by MAC CE 720 . In this example, the code point 1022 is in the range from 0 to 7. Each code point corresponds to a set of TCI states. For example, code point 0 corresponds to TCI state #1, TCI state #10, and TCI state #22 in sequence. Additionally, the first TCI state in each group is assigned to TRP 712 , the second TCI state is assigned to TRP 714 , and the third TCI state is assigned to TRP 716 . Thus, TCI state #1 is assigned to TRP 712 , TCI state #10 is assigned to TRP 714 , and TCI state #22 is assigned to TRP 716 for codepoint 0.

Furthermore, when the number of TCI states in the group corresponding to the code point is less than the number of TRPs communicated with the UE 704, the UE 704 can be configured with certain rules that can be used to determine the assignment of TCI states to those not explicitly in the group. TRP for TCI status. For example, the group corresponding to code point 1 includes only one TCI state #8, which is assigned to TRP 712 . Therefore, UE 704 can use certain rules to determine the TCI status assigned to TRP 714 and TRP 716 . In one example, the TCI state assigned to TRP 714 and TRP 716 may be the same as the TCI state assigned to TRP 712 based on the rules (ie, TCI state #8). In another example, the TCI state assigned to TRP 714 and TRP 716 may be a preset TCI state (eg, TCI state #0).

As mentioned above, the resource sets configured at UE 704 have been grouped into different groups, and these groups are assigned to different TRPs respectively. As shown in FIG. 7, groups 0, 1, and 2 of resource sets are assigned to TRPs 712, 714, 716, respectively.

UE 704 then receives DCI 770 from base station 702 . DCI 770 includes an indication of a code point. Based on the codepoint, the UE 704 selects a set of activated TCI states corresponding to the codepoint. Based on the selected group, UE 704 can determine the corresponding TCI status assigned to each TRP. Furthermore, as described above, one or a plurality of resource sets may be allocated to each TRP. Thus, when UE 704 communicates with a particular TRP on the set of resources included in the assigned group, UE 704 uses the corresponding TCI state assigned to that particular TRP for transmission and/or reception.

For example, DCI 770 may indicate code point 1. Accordingly, UE 704 selects the set of activated TCI states corresponding to codepoint 1 . The selected group includes TCI State #1, TCI State #10, and TCI State #22. As noted above, TRP 712 is assigned TCI State #1. Additionally, group 0 of the resource set is assigned to TRP 712. Therefore, when UE 704 receives a signal from TRP 712 on CORESET 0, CSI RESOURCE SET 1 and/or CSI RESOURCE SET 2, UE 704 uses TCI state #1. When UE 704 transmits to TRP 712 on PUCCH Resource Set 1 or PUCCH Resource Set 3, UE 704 also uses TCI State #1.

Figure 11 is a flow diagram 100 of a first method (process) for activating and selecting a TCI state. The method can be performed by a UE (eg, UE 704). In operation 1102, the UE receives one or a plurality of configurations indicating a plurality of resource groups respectively allocated to a plurality of TRPs. In some configurations, each of the plurality of resource groups includes at least one of a CORESET, a CSI resource, and a PUCCH resource. In some configurations, one or more configurations include resource configurations, each resource configuration being associated with one of the plurality of resource groups. In some configurations, one or more configurations include respective lists indicating resources allocated to each of the plurality of resource groups. In operation 1104, the UE receives an activation configuration for activating multiple sets of TCI states. Each of the groups includes one or a plurality of TCI states, each TCI state being assigned to a corresponding one of the plurality of TRPs. In operation 1106, the UE activates multiple sets of TCI states.

In operation 1108, the UE receives a DCI including an indication indicating a TCI state of a first group of the plurality of groups. In operation 1110, the UE determines to communicate with a first TRP among the plurality of TRPs on a first resource. The first resource is in a first group of resources allocated to the first TRP. The first set of resources belongs to a plurality of resource groups. In operation 1112, the UE determines a first TCI state assigned to the first TRP based on the first set of TCI states. In operation 1114, the UE communicates with the first TRP on the first resource according to the first TCI state.

At operation 1116, the UE determines to communicate with a second TRP of the plurality of TRPs on a second resource, wherein the second resource is in a second set of resources allocated to the second TRP. The second set of resources belongs to a plurality of resource groups. In operation 1118, the UE determines a second TCI state assigned to the second TRP based on the first set of TCI states. When the first group does not include the second TCI state assigned to the second TRP, the UE determines the second TCI state based on the TCI state assigned to another TRP in the first group of TCI states. In operation 1120, the UE communicates with a second TRP on a second resource according to a second TCI state.

FIG. 12 is an example first diagram 200 illustrating a hardware implementation for an apparatus employing a processing system. Apparatus 1202 may be a UE. Processing system 1214 may be implemented using a bus architecture, generally represented by bus 1224 . Buses 1224 may include any number of interconnecting buses and bridges, depending on the particular application of processing system 1214 and the overall design constraints. The bus bar 1224 connects various circuits together, including one or multiple processors and/or hardware components, and is composed of one or multiple processors 1204, receiving components 1264, transmitting components 1270, TCI state activation components 1276, TCI state selection Component 1278, and computer readable medium/memory 1206 represent. The bus bar 1224 can also connect various other circuits, such as timing sources, peripheral devices, voltage regulators, and power management circuits.

Processing system 1214 may be coupled to transceiver 1210 , which may be one or a plurality of transceivers 254 . The transceiver 1210 is coupled to one or a plurality of antennas 1220 , which may be the communication antenna 252 .

Transceiver 1210 provides a means for communicating with various other devices over transmission media. The transceiver 1210 receives signals from one or more antennas 1220 , extracts information from the received signals, and provides the extracted information to the processing system 1214 , especially the receiving element 1264 . In addition, the transceiver 1210 receives information 1214 from the processing system, specifically from the transmission element 1270, and based on the received information, generates a signal to be applied to the antenna(s) 1220.

Processing system 1214 includes one or more processors 1204 coupled to computer readable medium/memory 1206 . The processor or processors 1204 are responsible for general processing, including executing software 1206 stored on the computer-readable medium/memory. The software, when executed by the processor(s) 1204, causes the processing system 1214 to perform the various functions described above for any particular device. The computer-readable medium/memory 1206 may also be used to store data that is manipulated by the processor(s) 1204 during execution of the software. Processing system 1214 also includes at least one of receive element 1264 , transmit element 1270 , TCI state activation element 1276 , and TCI state select element 1278 . These elements may be software elements running on one or more processors 1204, one or more hardware elements resident/stored in computer readable medium/memory 1206 coupled to one or more processors 1204 Body elements or some combination thereof. Processing system 1214 may be a component of UE 250 and may include memory 260 and/or at least one of TX processor 268 , RX processor 256 and communication processor 259 .

In one configuration, means for wireless communication 1202 includes means for performing each of the operations of FIG. 12 . The aforementioned means may be one or more of the aforementioned elements of the apparatus 1202 and/or the processing system 1214 of the apparatus 1202 configured to perform the functions recited by the aforementioned means.

Processing system 1214 may include TX processor 268 , RX processor 256 and communications processor 259 as described above. Thus, in one configuration, the aforementioned means may be a TX processor 268, an RX processor 256, and a communications processor 259 configured to perform the functions recited by the aforementioned means.

It is understood that the specific order or hierarchy of blocks in the processes/flow diagrams disclosed is an illustration of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of blocks in a process/flowchart may be rearranged. Also, some blocks may be combined or omitted. The accompanying method claims present elements of the various blocks in a sample order, and are not meant to be limited to the specific order or hierarchy presented.

The preceding 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 may be applied to other aspects. Accordingly, the claims are not intended to be limited to the aspects of the invention shown, but are to be accorded the full scope consistent with claim language where an element referred to in the singular is not intended to mean "one and only one" unless In particular it says so, but "one or more". The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any aspect of the invention described as "exemplary" is not necessarily to be construed as superior or superior to other aspects. Unless expressly stated otherwise, the term "some" means one or a plurality. Such as "at least one of A, B or C", "one or more of A, B or C", "at least one of A, B and C", "one or more of A, B and C A combination of "and "A, B, C, or any combination thereof" includes any combination of A, B, and/or C, and may include a plurality of A, a plurality of B, or a plurality of C. Specifically, such as "at least one of A, B or C", "one or more of A, B or C", "at least one of A, B and C", "of A, B and C One or more" and "A, B, C or any combination thereof, may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, any of which A class combination may comprise one or more members of A, B, or C. All structural and functional equivalents to elements of the various aspects described in this invention are known or will come to be known to those of ordinary skill in the art and are expressly incorporated by reference Incorporated into the present invention and intended to be covered by the scope of the patent application. In addition, any content disclosed in the present invention is not intended to be dedicated to the public, regardless of whether such disclosures are explicitly recorded in the scope of the patent application. "Module" , "mechanism", "component", "equipment" etc. cannot replace the word "means". Accordingly, no claim element should be construed as means-plus-function unless that element is explicitly recited using the phrase "means for".

100: Communication system 102: base station 102': small community 104:UE 108a: launch direction 108b: Receive direction 110,110': coverage area 120: Communication link 132/184: Backhaul link 134: Backhaul link 150: access point 152: station 154: Communication link 158: Communication link 160:EPC 162: Action Management Entity 164: MME 166: service gateway 168: Multimedia broadcast multicast service gateway 170:Broadcast and multicast service center 172: Packet data network gateway 174:Home Subscriber Server 176: IP service 180: gNB 182: Beamforming 190: Core network 192:AMF 193:Other AMFs 194: SMF 195:UPF 196:UDM 197: IP service 198:LMF 210: base station 216,268:TX processor 218,254:TX 220,252:220 250:UE 256,270: RX processor 258,274: channel estimator 259, 275: Controllers/Processors 260,276: memory 300: Decentralized RAN 302:ANC 304:NG-CN 306:5G access node 308:TRP 310:NG-AN 400: Decentralized RAN 402:C-CU 404:C-RU 406:DU 500:Example image 502: control part 504: DL data part 506: Public UL section 600: Example image 602: control part 604: UL data part 606: Public UL section 700: figure 702: base station 704:UE 712,714,716:TRP 720: MAC CE 770:DCI 800: Figure 810, 820: RRC configuration 814,824: instructions 900: figure 910: CSI measurement configuration 914,916: group list 916: Group list 1000: graph 1022: code point 1100: flow chart 1102, 1104, 1106, 1108, 1110, 1112, 1114, 1116, 1118, 1120: Operation 1200: Figure 1202: device 1204: Processor 1206: Computer readable media/memory 1210: Transceiver 1214: processing system 1220: Antenna 1224: busbar 1264: receiving element 1270: transmission element 1276: TCI state activation element 1278:TCI state selection element

FIG. 1 is a diagram illustrating an example of a wireless communication system and an access network. FIG. 2 is a diagram illustrating an example of a base station communicating with a UE in an access network. Figure 3 illustrates an example logical architecture of a distributed access network. Figure 4 illustrates an example physical architecture of a distributed access network. FIG. 5 is a diagram showing an example of a slot centered on DL. FIG. 6 is a diagram showing an example of a UL-centered slot. FIG. 7 is a diagram showing grouping of resource sets used for communication between a UE and a base station. Fig. 8 is a diagram illustrating a first technique for sending an indication of a group indicating a resource set. Fig. 9 is a diagram illustrating a second technique for sending an indication of a group indicating a resource set. Fig. 10 is an exemplary diagram showing TCI states corresponding to different code points. FIG. 11 is a flowchart 1100 of a method (process) for activating and selecting a TCI state. Fig. 12 is an example diagram showing a hardware implementation for an apparatus employing a processing system.

1100: flow chart

1102, 1104, 1106, 1108, 1110, 1112, 1114, 1116, 1118, 1120: Operation

Claims (20)

A wireless communication method for a user equipment (UE), comprising: receiving one or a plurality of configurations indicating a plurality of resource groups allocated to a plurality of transmission and reception points (TRPs), respectively; receiving an activation configuration for activating sets of transmission configuration indication (TCI) states, each of the sets comprising one or a plurality of TCI states, each TCI state being assigned to a corresponding one of the plurality of TRPs; The plurality of sets of TCI states are activated. The method as recited in claim 1, wherein each of the plurality of resource groups includes a control resource set (CORESET), a channel state information (CSI) resource, and a physical uplink control channel (PUCCH) resource. at least one. The method as described in claim 1, further comprising: receiving downlink control information (DCI), the DCI including an indication indicating a TCI state of a first set of the plurality of sets; determining to communicate with a first TRP of the plurality of TRPs on a first resource, wherein the first resource is in a first set of resources allocated to the first TRP, wherein the first set of resources belongs to the a plurality of resource groups; determining a first TCI state assigned to the first TRP based on the first set of TCI states; and communicating with the first TRP on the first resource according to the first TCI state. The method as described in claim item 3, further comprising: determining to communicate with a second TRP of the plurality of TRPs on a second resource, wherein the second resource is in a second set of resources allocated to the second TRP, wherein the second set of resources belongs to the plurality of resource group; determining a second TCI state assigned to the second TRP based on the first set of TCI states; and communicating with the second TRP on the second resource according to the second TCI state. The method as described in claim item 3, further comprising: determining to communicate with a second TRP of the plurality of TRPs on a second resource, wherein the second resource is in a second set of resources allocated to the second TRP, wherein the second set of resources belongs to the a plurality of resource groups; determining that the first set does not include a second TCI state assigned to the second TRP; determining the second TCI state based on a TCI state assigned to another TRP in the first set of TCI states; communicating with the second TRP on the second resource according to the second TCI state. The method as claimed in claim 1, wherein the one or plurality of configurations comprises a plurality of resource configurations, each resource configuration being associated with one of the plurality of resource groups. The method of claim 1, wherein said one or plurality of configurations includes a respective list indicating resources allocated to each of said plurality of resource groups. A device for wireless communication, the device is a user equipment (UE), comprising: memory; and at least one processor coupled to the memory configured to: receiving one or a plurality of configurations indicating a plurality of resource groups allocated to a plurality of transmission and reception points (TRPs), respectively; receiving an activation configuration for activating sets of transmission configuration indication (TCI) states, each of the sets comprising one or a plurality of TCI states, each TCI state being assigned to a corresponding one of the plurality of TRPs; The plurality of sets of TCI states are activated. The apparatus of claim 8, wherein each of the plurality of resource groups includes control resource sets (CORESET), channel state information (CSI) resources, and physical uplink control channel (PUCCH) resources at least one. The device according to claim 8, wherein the at least one processor is further configured to: receiving downlink control information (DCI), the DCI including an indication indicating a TCI state of a first set of the plurality of sets; determining to communicate with a first TRP of the plurality of TRPs on a first resource, wherein the first resource is in a first set of resources allocated to the first TRP, wherein the first set of resources belongs to the a plurality of resource groups; determining a first TCI state assigned to the first TRP based on the first set of TCI states; and communicating with the first TRP on the first resource according to the first TCI state. The device according to claim 10, wherein the at least one processor is further configured to: determining to communicate with a second TRP of the plurality of TRPs on a second resource, wherein the second resource is in a second set of resources allocated to the second TRP, wherein the second set of resources belongs to the plurality of resource group; determining a second TCI state assigned to the second TRP based on the first set of TCI states; and communicating with the second TRP on the second resource according to the second TCI state. The device according to claim 10, wherein the at least one processor is further configured to: determining to communicate with a second TRP of the plurality of TRPs on a second resource, wherein the second resource is in a second set of resources allocated to the second TRP, wherein the second set of resources belongs to the a plurality of resource groups; determining that the first set does not include a second TCI state assigned to the second TRP; determining the second TCI state based on a TCI state assigned to another TRP in the first set of TCI states; communicating with the second TRP on the second resource according to the second TCI state. The apparatus of claim 8, wherein the one or plurality of configurations comprises a plurality of resource configurations, each resource configuration being associated with one of the plurality of resource groups. The apparatus of claim 8, wherein the one or plurality of configurations comprises a respective list indicating resources allocated to each of the plurality of resource groups. A computer-readable medium storing computer-executable code for wireless communication of a user equipment (UE), comprising: receiving one or a plurality of configurations indicating a plurality of resource groups allocated to a plurality of transmission and reception points (TRPs), respectively; receiving an activation configuration for activating sets of transmission configuration indication (TCI) states, each of the sets comprising one or a plurality of TCI states, each TCI state being assigned to a corresponding one of the plurality of TRPs; The plurality of sets of TCI states are activated. The computer readable medium of claim 15, wherein each of the plurality of resource groups includes a control resource set (CORESET), a channel state information (CSI) resource, and a physical uplink control channel (PUCCH) At least one of the resources. The computer-readable medium according to claim 15, wherein the code is further configured to: receiving downlink control information (DCI), the DCI including an indication indicating a TCI state of a first set of the plurality of sets; determining to communicate with a first TRP of the plurality of TRPs on a first resource, wherein the first resource is in a first set of resources allocated to the first TRP, wherein the first set of resources belongs to the a plurality of resource groups; determining a first TCI state assigned to the first TRP based on the first set of TCI states; and communicating with the first TRP on the first resource according to the first TCI state. The computer-readable medium according to claim 17, wherein the code is further configured to: determining to communicate with a second TRP of the plurality of TRPs on a second resource, wherein the second resource is in a second set of resources allocated to the second TRP, wherein the second set of resources belongs to the plurality of resource group; determining a second TCI state assigned to the second TRP based on the first set of TCI states; and communicating with the second TRP on the second resource according to the second TCI state. The computer-readable medium according to claim 17, wherein the code is further configured to: determining to communicate with a second TRP of the plurality of TRPs on a second resource, wherein the second resource is in a second set of resources allocated to the second TRP, wherein the second set of resources belongs to the a plurality of resource groups; determining that the first set does not include a second TCI state assigned to the second TRP; determining the second TCI state based on a TCI state assigned to another TRP in the first set of TCI states; communicating with the second TRP on the second resource according to the second TCI state. The computer-readable medium of claim 15, wherein the one or plurality of configurations includes a plurality of resource configurations, each resource configuration being associated with one of the plurality of resource groups.

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