Method and apparatus for PCI-based beam activation

Abstract

The present disclosure relates to methods and apparatus for wireless communications, including devices, such as UEs and / or cells or base stations. In one aspect, the device may receive a DCI from a first cell among a plurality of cells, the DCI indicating at least one of a plurality of TCI states, a plurality of PL RS IDs, or a plurality of spatial relationship information IDs corresponding to one or more PCIs, each of the one or more PCIs being associated with a cell. The device may also determine a first PCI associated with the first cell based on at least one of a first TCI state, a first PL RS ID, or a first spatial relationship information ID corresponding to the first PCI. In addition, the device may communicate with the first cell on a first beam based on the determined first PCI.

Description

Technical Field

[0001] The present disclosure relates generally to communication systems, and more particularly, to beamforming in wireless communication systems. Background Art

[0002] 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.

[0003] 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 (for example, for the Internet of Things (IoT)), and other requirements. 5G NR includes services associated with enhanced (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. Further improvements to 5G NR technology are needed. These improvements also apply to other multiple access technologies and telecommunication standards that adopt these technologies. Summary of the Invention

[0004] The following is a brief summary of one or more aspects to provide a basic understanding of these aspects. This summary is not an extensive overview of all contemplated aspects and is neither intended to identify key or critical elements of all aspects nor to 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.

[0005] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a user equipment (UE). The apparatus may receive downlink control information (DCI) from a first cell among multiple cells, the DCI indicating at least one of multiple transmission configuration indication (TCI) states, multiple path loss (PL) reference signal (RS) identifiers (IDs), or multiple spatial relationship information IDs, wherein at least one of the multiple TCI states, multiple PL RS IDs, or multiple spatial relationship information IDs corresponds to one or more physical cell identities (PCIs), each of the one or more PCIs being associated with one of the multiple cells. The apparatus may also receive a media access control (MAC) control element (MAC-CE) indicating a first PCI associated with the first cell. In addition, the apparatus may determine a first PCI associated with the first cell among one or more PCIs based on at least one of a first TCI state among the multiple TCI states, a first PL RS ID among the multiple PL RS IDs, or a first spatial relationship information ID among the multiple spatial relationship information IDs, wherein at least one of the first TCI state, the first PL RS ID, or the first spatial relationship information ID corresponds to the first PCI. The apparatus may also communicate with the first cell on the first beam based on the determined first PCI associated with the first cell.

[0006] In another aspect of the present disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a cell or a base station. The apparatus may send downlink control information (DCI) to a user equipment (UE), the DCI indicating at least one of a transmission configuration indication (TCI) state, a path loss (PL) reference signal (RS) identifier (ID), or a spatial relationship information ID, wherein at least one of the TCI state, the PL RS ID, or the spatial relationship information ID corresponds to at least one physical cell identity (PCI), and the at least one PCI is associated with the cell. The apparatus may also send a medium access control (MAC) control element (MAC-CE) indicating at least one PCI associated with the cell. In addition, the apparatus may communicate with the UE on a first beam based on at least one PCI associated with the cell.

[0007] To accomplish the foregoing and related ends, one or more aspects comprise the features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of one or more aspects. However, these features are indicative of but a few of the various ways in which the principles of the various aspects may be employed, and this description is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1is a diagram illustrating an example of a wireless communication system and an access network.

[0009] Figure 2A is a diagram illustrating an example of a first frame according to various aspects of the present disclosure.

[0010] Figure 2B is a diagram illustrating an example of DL channels within a subframe according to various aspects of the present disclosure.

[0011] Figure 2C is a diagram illustrating an example of a second frame according to various aspects of the present disclosure.

[0012] Figure 2D is a diagram illustrating an example of UL channels within a subframe according to various aspects of the present disclosure.

[0013] Figure 3 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0014] Figure 4 is a diagram illustrating example communications between a UE and a cell in accordance with one or more techniques of this disclosure.

[0015] Figure 5 is a diagram illustrating example communications between a UE and a cell in accordance with one or more techniques of this disclosure.

[0016] Figure 6 is an example structure of a MAC-CE according to one or more techniques of this disclosure.

[0017] Figure 7 is a diagram illustrating example communications between a UE and a base station in accordance with one or more techniques of this disclosure.

[0018] Figure 8 is a diagram illustrating example communications between a UE and a base station in accordance with one or more techniques of this disclosure.

[0019] Figure 9 is a flow chart of a method of wireless communication.

[0020] Figure 10 is a flow chart of a method of wireless communication.

[0021] Figure 11 is a diagram illustrating an example of a hardware implementation for an example apparatus.

[0022] Figure 12 is a diagram illustrating an example of a hardware implementation for an example apparatus. DETAILED DESCRIPTION

[0023] The detailed description set forth below in conjunction with the accompanying drawings is intended to describe various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details intended to provide a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some cases, to avoid obscuring these concepts, well-known structures and components are shown in block diagram form.

[0024] Several aspects of telecommunications systems will now be described with reference to various apparatuses and methods. These apparatuses and methods are described in the following detailed description and illustrated in the accompanying drawings as various blocks, components, circuits, processes, algorithms, etc. (collectively, "elements"). These elements can be implemented using electronic hardware, computer software, or any combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0025] For example, any combination of an element or any part of an element or an element can be implemented as a "processing system" including one or more processors. The example of a processor includes a microprocessor, a microcontroller, a graphics processing unit (GPU), a central processing unit (CPU), an application processor, a digital signal processor (DSP), a reduced instruction set computing (RISC) processor, a system on a chip (SoC), a baseband processor, a field programmable gate array (FPGA), a programmable logic device (PLD), a state machine, a gating logic, a discrete hardware circuit, and other suitable hardware configured to perform the various functions described throughout this disclosure. One or more processors in a processing system can execute software. Software should be broadly interpreted as an instruction, an instruction set, a code, a code segment, a program code, a program, a subroutine, a software component, an application, a software application, a software package, a routine, a subroutine, an object, an executable program, an execution thread, a process, a function, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or other.

[0026] Therefore, in one or more example embodiments, the functions can be implemented in hardware, software or any combination thereof. If implemented in software, these functions can be stored in or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. Storage media can be any available media that can be accessed by a computer. As an example and not limitation, such computer-readable media can include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, a combination of the above-mentioned 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 accessible to a computer.

[0027] Figure 1 1 is a diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (EPC) 160, and an additional core network 190 (e.g., a 5G core (5GC)). The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). A macro cell includes a base station. A small cell includes a femto cell, a pico cell, and a micro cell.

[0028] A base station 102 configured for 4G LTE (collectively referred to as the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC 160 via a first backhaul link 132 (e.g., an S1 interface). A base station 102 configured for 5G NR (collectively referred to as the Next Generation RAN (NG-RAN)) may interface with the core network 190 via a second backhaul link 184. The base station 102 may perform one or more of the following functions, among other things: transmission of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and device tracking, RAN information management (RIM), paging, positioning, and delivery of warning messages. Base stations 102 can communicate with each other directly or indirectly (eg, through EPC 160 or core network 190) via a third backhaul link 134 (eg, an X2 interface). First backhaul link 132, second backhaul link 184, and third backhaul link 134 can be wired or wireless.

[0029] Base stations 102 can communicate wirelessly with UEs 104. Each of base stations 102 can provide communication coverage for its own geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102' may have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network that includes both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved Node B (eNB) (HeNB), which may provide service to a restricted group called a closed subscriber group (CSG). The communication link 120 between base station 102 and UE 104 may include uplink (UL) (also known as reverse link) transmissions from UE 104 to base station 102 and / or downlink (DL) (also known as forward link) transmissions from base station 102 to UE 104. The communication link 120 may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication link may be over one or more carriers. For each carrier allocated in a carrier aggregation (x component carriers) for transmission in each direction, up to a total of Yx MHz, the base station 102 / UE 104 can use spectrum with a bandwidth of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz). These carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL). A component carrier may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell), and the secondary component carrier may be referred to as a secondary cell (SCell).

[0030] Certain UEs 104 may communicate with each other using device-to-device (D2D) communication links 158. The D2D communication links 158 may use the DL / UL WWAN spectrum. The D2D communication links 158 may 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 may be performed over various wireless D2D communication systems, such as, for example, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0031] The wireless communication system may also include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 via a communication link 154, for example, in the 5 GHz unlicensed spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) to determine whether the channel is available before communicating.

[0032] The small cell 102' can operate in a licensed and / or unlicensed spectrum. When operating in an unlicensed spectrum, the small cell 102' can employ NR and use the same unlicensed spectrum (e.g., 5 GHz, etc.) as used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum can expand the coverage of the access network and / or increase the capacity of the access network.

[0033] The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5GNR, two initial operating bands are identified as frequency ranges designated FR1 (410MHz-7.125GHz) and FR2 (24.25GHz-52.6GHz). The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Although part of FR1 is greater than 6GHz, FR1 is often referred to (interchangeably) as a sub-6GHz band in various documents and articles. FR2 sometimes presents a similar naming issue, although it is different from the extremely high frequency (EHF) band (30GHz-300GHz) identified as a "millimeter wave" band by the International Telecommunication Union (ITU), FR2 is often referred to (interchangeably) as a "millimeter wave" band in various documents and articles.

[0034] In view of the above aspects, unless otherwise specified, it should be understood that the terms "sub-6 GHz" and the like as used herein can broadly refer to frequencies below 6 GHz, which may be within FR1, or which may include mid-band frequencies. In addition, unless otherwise specified, it should be understood that the terms "millimeter wave" and the like, if used herein, can broadly refer to frequencies which may include mid-band frequencies, which may be within FR2, or which may be within the EHF band.

[0035] Base station 102, whether a small cell 102' or a large cell (e.g., a macro base station), may include and / or be referred to as an eNB, gNodeB (gNB), or other type of base station. Some base stations, such as gNB 180, may operate in traditional sub-6 GHz spectrum, millimeter wave frequencies, and / or near millimeter wave frequencies in communications with UE 104. When gNB 180 operates in millimeter wave or near millimeter wave frequencies, gNB 180 may be referred to as a millimeter wave base station. Millimeter wave base station 180 may utilize beamforming 182 with UE 104 to compensate for path loss and short range. Base station 180 and UE 104 may each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays, to facilitate beamforming.

[0036] Base station 180 may transmit beamformed signals in one or more transmit directions 182′ to UE 104. UE 104 may receive beamformed signals from base station 180 in one or more receive directions 182″. UE 104 may also transmit beamformed signals in one or more transmit directions to base station 180. Base station 180 may receive beamformed signals in one or more receive directions from UE 104. Base station 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 base station 180 may be the same or different. The transmit and receive directions of UE 104 may be the same or different.

[0037] EPC 160 may 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. MME 162 may 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 Serving Gateway 166, which itself is connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation and other functions. PDN Gateway 172 and BM-SC 170 are connected to IP Services 176. IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), PS streaming services, and / or other IP services. The BM-SC 170 may provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 may serve as the entry point for content providers' MBMS transmissions, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS gateway 168 may be used to distribute MBMS services to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area broadcasting a specific service, and may be responsible for session management (start / stop) and collecting eMBMS-related charging information.

[0038] The core network 190 may 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 may communicate with a unified data management (UDM) 196. The AMF 192 is a control node that handles signaling between the UE 104 and the core network 190. Generally, the AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are transmitted through the UPF 195. The UPF 195 provides UE IP address allocation and other functions. The UPF 195 is connected to the IP services 197. The IP services 197 may include the Internet, the intranet, the IP multimedia subsystem (IMS), the packet switched (PS) stream (PSS) service, and / or other IP services.

[0039] A base station may include and / or be referred to as a gNB, Node B, eNB, access point, base transceiver station, radio base station, radio transceiver, transceiver functionality, basic service set (BSS), extended service set (ESS), transmit reception point (TRP), or some other suitable terminology. Base station 102 provides an access point for UE 104 to EPC 160 or core network 190. Examples of UE 104 include a cellular phone, a smartphone, 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., an MP3 player), a camera, a game console, a tablet computer, 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 similarly functional device. Some of UE 104 may be referred to as IoT devices (e.g., a parking meter, a gas pump, a toaster, a vehicle, a heart monitor, etc.). UE 104 may 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 communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handheld device, a user agent, a mobile client, a client, or some other suitable terminology.

[0040] Reference again Figure 1 In certain aspects, the UE 104 may include a receiving component 198 configured to receive downlink control information (DCI) from a first cell of a plurality of cells, the DCI indicating at least one of a plurality of transmission configuration indication (TCI) states, a plurality of path loss (PL) reference signal (RS) identifiers (IDs), or a plurality of spatial relationship information IDs, wherein at least one of the plurality of TCI states, the plurality of PL RS IDs, or the plurality of spatial relationship information IDs corresponds to one or more physical cell identities (PCIs), each of the one or more PCIs being associated with one of the plurality of cells. The receiving component 198 may also be configured to receive a medium access control (MAC) control element (MAC-CE) indicating a first PCI associated with the first cell. The receiving component 198 may also be configured to determine a first PCI associated with the first cell of the one or more PCIs based on at least one of a first TCI state of the plurality of TCI states, a first PL RS ID of the plurality of PL RS IDs, or a first spatial relationship information ID of the plurality of spatial relationship information IDs, wherein at least one of the first TCI state, the first PL RS ID, or the first spatial relationship information ID corresponds to the first PCI. The receiving component 198 may also be configured to communicate with the first cell on the first beam based on the determined first PCI associated with the first cell.

[0041] Reference again Figure 1 In certain aspects, the base station 180 may include a transmitting component 199 configured to transmit downlink control information (DCI) to a user equipment (UE), the DCI indicating at least one of a transmission configuration indication (TCI) state, a path loss (PL) reference signal (RS) identifier (ID), or a spatial relation information ID, wherein the at least one of the TCI state, the PL RS ID, or the spatial relation information ID corresponds to at least one physical cell identity (PCI), the at least one PCI being associated with a cell. The transmitting component 199 may also be configured to transmit a medium access control (MAC) control element (MAC-CE) indicating the at least one PCI associated with the cell. The transmitting component 199 may also be configured to communicate with the UE on a first beam based on the at least one PCI associated with the cell.

[0042] Although the following description may focus on 5G NR, the concepts described herein may be applicable to other similar areas such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0043] Figure 2A FIG200 is a diagram illustrating an example of a first subframe within a 5G NR frame structure. Figure 2B FIG230 is a diagram illustrating an example of DL channels within a 5G NR subframe. Figure 2C FIG250 is a diagram illustrating an example of a second subframe within a 5G NR frame structure. Figure 2D FIG280 is a diagram illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be frequency division duplex (FDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated to either DL or UL; or time division duplex (TDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated to both DL and UL. Figure 2A 、 Figure 2CIn the example provided, the 5G NR frame structure is assumed to be TDD, subframe 4 is configured with slot format 28 (primarily DL), where D refers to DL, U refers to UL, and F refers to flexible use between DL / UL, and subframe 3 is configured with slot format 1 (all UL). Although subframes 3 and 4 are shown as having slot formats 1 and 28, respectively, any particular subframe can be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are all DL and all UL, respectively. Other slot formats 2-61 include a mix of DL, UL and flexible symbols. The UE is configured with the slot format via the received slot format indicator (SFI) (dynamically through DL control information (DCI) or semi-statically / statically through radio resource control (RRC) signaling). Note that the following description also applies to the 5G NR frame structure as TDD.

[0044] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10ms) may be divided into 10 equally sized subframes (1ms). Each subframe may include one or more time slots. A subframe may also include mini-slots, which may include 7, 4, or 2 symbols. Depending on the slot configuration, each time slot may include 7 or 14 symbols. For slot configuration 0, each time slot may include 14 symbols, while for slot configuration 1, each time slot may include 7 symbols. The symbols on the DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also known as single carrier frequency division multiple access (SC-FDMA) symbols) (for power-limited scenarios; limited to single stream transmission). The number of time slots within a subframe is based on the slot configuration and parameter set. For slot configuration 0, different parameter sets μ0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For slot configuration 1, different parameter sets μ0 to 2 allow 2, 4, and 8 slots per subframe, respectively. Therefore, for slot configuration 0 and parameter set μ, there are 14 symbols / slot and 2 μ timeslots / subframes. The subcarrier spacing and symbol length / duration are functions of the parameter set. The subcarrier spacing can be equal to 2 μ *15kHz, where μ is a parameter set 0 to 4. Thus, parameter set μ=0 has a subcarrier spacing of 15kHz and parameter set μ=4 has a subcarrier spacing of 240kHz. Symbol length / duration is inversely proportional to the subcarrier spacing. Figure 2A-2DAn example is provided for slot configuration 0 with 14 symbols per slot and parameter set μ=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs. Within a set of frames, there may be one or more different bandwidth parts (BWPs) that are frequency-division multiplexed (see Figure 2B ). Each BWP can have a specific set of parameters.

[0045] The resource grid can be used to represent the frame structure. Each time slot includes a resource block (RB) (also known as a physical RB (PRB)) that extends over 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.

[0046] like Figure 2A As shown, some of the REs carry reference (pilot) signals (RS) for the UE. The RSs may include a demodulation RS (DM-RS) (denoted as R for a particular configuration, but other DM-RS configurations are possible) and a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RSs may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0047] Figure 2BExamples of various DL channels within a subframe of a frame are shown. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE comprising six RE groups (REGs), each REG comprising 12 consecutive REs in one OFDM symbol of the RB. The PDCCH within a BWP may be referred to as a control resource set (CORESET). The UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., common search space, UE-specific search space) during a PDCCH monitoring opportunity on the CORESET, where the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at higher and / or lower frequencies across the channel bandwidth. The primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of the frame. The UE 104 uses the PSS to determine subframe / symbol timing and physical layer identity. The secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of the frame. The UE uses the SSS to determine the physical layer cell identity group number and radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the position of the aforementioned DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also referred to as an SS block (SSB)). The MIB provides the number of RBs in the system bandwidth and the system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information that is not transmitted through the PBCH, such as system information blocks (SIBs) and paging messages.

[0048] like Figure 2C As shown, some of the REs carry DM-RSs for channel estimation at the base station (denoted as R for one specific configuration, but other DM-RS configurations are also possible). The UE can send DM-RSs for the physical uplink control channel (PUCCH) and DM-RSs 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 a short PUCCH or a long PUCCH is transmitted, and on the specific PUCCH format used. The UE can send a sounding reference signal (SRS). The SRS can be transmitted in the last symbol of the subframe. The SRS can have a comb structure, and the UE can send the SRS on one of the comb structures. The base station can use the SRS for channel quality estimation to achieve frequency-dependent scheduling on the UL.

[0049] Figure 2DAn example of various UL channels within a subframe of a frame is shown. In one configuration, the PUCCH may be located. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), and hybrid automatic repeat request (HARQ) ACK / NACK feedback. The PUSCH carries data and may additionally be used to carry buffer status reports (BSRs), power headroom reports (PHRs), and / or UCI.

[0050] Figure 3 3 is a block diagram of a base station 310 communicating with a UE 350 in an access network. In the DL, IP packets from the EPC 160 may be provided to the controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functions. Layer 3 includes the radio resource control (RRC) layer, while layer 2 includes the service data adaptation protocol (SDAP) layer, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, and the medium access control (MAC) layer. The controller / processor 375 provides RRC layer functions associated with broadcasting of system information (e.g., MIB, SIB), 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 for UE measurement reporting; PDCP layer functions associated with header compression / decompression, security (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; RLC layer functions associated with transmission of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0051] The transmit (TX) processor 316 and receive (RX) processor 370 implement layer 1 functions associated with various signal processing functions. Layer 1, including the physical (PHY) layer, may include error detection on the transport channel, forward error correction (FEC) encoding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation 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 divided into parallel streams. Each stream can then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a 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 channel estimator 374 may be used to determine coding and modulation schemes, as well as for spatial processing. Channel estimates may be derived from reference signals and / or channel condition feedback transmitted by UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX may modulate an RF carrier with a respective spatial stream for transmission.

[0052] At the UE 350, each receiver 354RX receives a signal via its respective antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functions 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 into a single OFDM symbol stream by the RX processor 356. 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. By determining the most likely signal constellation point transmitted by the base station 310, the symbols and reference signals on each subcarrier are recovered and demodulated. These soft decisions can be based on channel estimates calculated by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent on the physical channel by base station 310. The data and control signals are then provided to a controller / processor 359, which implements layer 3 and layer 2 functionality.

[0053] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport and logical channels, packet reassembly, decryption, 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 ACK and / or NACK protocols to support HARQ operations.

[0054] Similar to the functions described in conjunction with the DL transmission of the base station 310, the controller / processor 359 provides RRC layer functions associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functions associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functions associated with transmission of upper layer PDUs, error correction through ARQ, concatenation, segmentation and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and transport 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.

[0055] The TX processor 368 may select an appropriate coding and modulation scheme and facilitate spatial processing using channel estimates derived by the channel estimator 358 from a reference signal or feedback transmitted by the base station 310. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a respective spatial stream for transmission.

[0056] UL transmissions are processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality 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 an RX processor 370.

[0057] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer-readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the UE 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0058] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to Figure 1 198 related aspects.

[0059] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform operations related to Figure 1 199 related aspects.

[0060] Some aspects of wireless communication may include beam switching across different cells or base stations (e.g., serving cells and non-serving cells). For example, 5G New Radio (NR) wireless communication may include. Therefore, wireless communication may introduce L1 / L2 inter-cell mobility to reduce communication latency, rather than utilizing RRC layer handover. In some aspects, mobility may be improved via beam switching across serving and non-serving cells. Each potential serving cell or neighboring cell may include a pre-selected physical cell identity (PCI) so that the beam switching process may be faster. In addition, each serving cell may have a single or multiple cells or transmit receive points (TRPs), which may share the same PCI.

[0061] In some aspects, the transmission configuration indication (TCI) state or spatial relationship of the serving cell for the downlink (DL) or uplink (UL) beam can utilize quasi co-location (QCL). For example, the physical channel of the serving cell can be quasi-co-located (QCLed) with the synchronization signal block (SSB) of the PCI from the serving cell or an adjacent non-serving cell. In some cases, each serving cell or base station can have a single TRP. Each serving cell or base station can also have multiple TRPs. In addition, reference signals from adjacent non-serving cells can be used for beam indication of the physical channel of the serving cell.

[0062] Figure 4 4 is a diagram 400 illustrating example communications between a UE 402 and a cell or base station 404. Figure 4 As shown, UE 402 may be served by PCI 0 associated with base station 404, while PCI 3 and PCI 4 are neighboring cells. In diagram 400, L1 / L2 inter-cell mobility may be achieved via beam switching across serving and non-serving cells. Each serving cell may have a single or multiple TRPs, such as a base station, that share the same PCI. Figure 4 Examples include configurations where each serving cell has a single TRP.

[0063] exist Figure 4In

[15] , the TCI state or spatial relationship of the serving cell for downlink or uplink beams can be quasi-co-located (QCL) with the SSB of the PCI from the same serving cell or adjacent non-serving cell. Figure 4 As shown, the TCI status can be synchronized with the SSB from PCI 0. In some cases, the TCI status or spatial relationship information in the neighboring non-serving cells can be used to provide beam indication.

[0064] like Figure 4 As shown, each serving cell or base station can have one or more TRPs. In addition, the TCI status of a serving cell (e.g., for downlink communication) can be quasi-co-located with the SSB or SSB ID of the PCI from the same serving cell or a neighboring non-serving cell. In addition, spatial relationship information can be used for uplink communication. In some cases, the TCI status or spatial relationship information of a neighboring non-serving cell can be used for beam indication for potential future beam switching.

[0065] Figure 5 5 is a diagram 500 illustrating example communications between a UE 502 and a cell or base station 504 . Figure 5 The beam switching process in aspects of wireless communication is shown. Diagram 500 includes a UE 502, a cell or base station 504 (including PCIs, such as PCI 0 to PCI 9, a PCI for L3 measurements 506, and a PCI for L1 measurements 508).

[0066] exist Figure 5 In the first step of the beam switching process in , UE 502 may enter connected mode after initial access (IA) on a serving cell with PCI (e.g., PCI 0). Figure 5 In the second step of the beam switching process in

[0055] , UE 502 may measure and report Layer 3 (L3) metrics for neighboring PCIs (e.g., PCI 1 to PCI 6) detected by the UE or searcher. Thus, UE 502 may detect neighboring PCIs that exceed an L3 threshold and surround the serving cell.

[0067] exist Figure 5In the third step of the beam switching process in , based on the L3 report, the cell or base station can configure a TCI state associated with a specific PCI (e.g., PCI 0, PCI 3, PCI 4, where PCI 3 and PCI 4 can be from a neighboring non-serving cell). For those configured TCI states, the UE 502 can be further configured with L1 measurements or metrics, such as reference signal received power (RSRP) or signal-to-interference-plus-noise ratio (SINR). These PCIs (e.g., PCI 0, PCI 3, PCI 4) can be defined as an L1 measurement PCI set 508. In addition, the L1 metric can be a short-term metric, while the L3 metric can be a long-term metric compared to the L1 metric. In some aspects, the UE 502 can perform L1 or L3 measurements and then send an L1 or L3 report to the base station.

[0068] exist Figure 5 In the fourth step of the beam switching procedure in , based on the L1 measurement or report from the UE, the base station can activate a TCI state associated with a neighboring PCI (e.g., PCI 4) to serve the UE. This may be because the UE is moving away from the serving cell and closer to the neighboring cell. The L1 measurement or report may include an SSB ID and metrics such as RSRP or SINR. In the fifth step of the beam switching procedure, based on the updated L3 report, the base station can move the serving cell from PCI 0 to PCI 4. The cell or base station may also configure a new TCI state associated with the updated L1 measurement PCI set (e.g., PCI 4, PCI 7, or PCI 8).

[0069] Some aspects of wireless communication may utilize beam and / or path loss (PL) reference signal (RS) activation for each physical cell identity (PCI). In L1 or L2 inter-cell mobility, different TRPs associated with different PCIs may schedule downlink (DL) or uplink (UL) signals, respectively. This may be similar to communication protocols in other aspects of wireless communication, such as multiple transmit receive point (TRP) (mTRP) communication based on multiple downlink control information (DCI) (mDCI).

[0070] In some aspects, the DCI from a TRP may include a beam indication, such as a downlink or uplink transmission configuration indication (TCI) state identifier (ID) or a spatial relation ID, and / or a path loss (PL) RS indication, such as a PL RS ID. In some cases, to reduce the amount of overhead used for these indications, a code point with a reduced bit count may be carried in the DCI instead of a full ID. For example, this may reduce overhead because the code point may be a local index into an activated ID. In cases where different TRPs are scheduled separately, overhead may be further reduced by using the code point as a local index into the activated beam or PL RS ID associated with the scheduling TRP.

[0071] Based on the above, there is a need to reduce the number of bits in DCI, for example, by using code points instead of full identifiers. There is also a need to use code points as local indices for each PCI. Furthermore, there is a need to use a downlink or uplink beam ID and / or PL RS ID for uplink power control to be activated for each PCI.

[0072] Aspects of the present disclosure can reduce the number of bits in the DCI, for example, by utilizing code points in the DCI rather than full identifiers. For example, aspects of the present disclosure can utilize code points as local indices for each PCI. Furthermore, aspects of the present disclosure can utilize downlink or uplink beam IDs and / or PL RS IDs for each PCI for which uplink power control is to be activated.

[0073] In some aspects, the present disclosure may utilize beam IDs (e.g., TCI state IDs and / or spatial relation information IDs) and PL RS activation for each PCI. For example, downlink or uplink beam IDs and PL RS IDs for uplink power control may be activated for each PCI. For example, for each PCI, the UE may be configured with a list of beam IDs or PL RS IDs, and a subset of the beam IDs or PL RS IDs in the list may be activated. The UE may also receive an activation indication for each PCI. In addition, the activated beam ID or PL RS ID may be represented by a PCI-specific code point with a reduced number of bits compared to the full ID of the beam ID or PL RS ID. By doing so, the present disclosure may reduce the number of bits in the DCI carrying the indication. For example, for a given PCI, each activated ID may be mapped to a PCI-specific code point based on the order of the activated IDs for that PCI.

[0074] In some cases, to reduce the number of bits in a PCI-specific activation media access control (MAC) control element (MAC-CE), the beam ID or PL RS ID configured in the list for the PCI may be carried in the activation MAC-CE. Thus, the beam ID or PL RS ID may be a candidate ID for PCI activation. In some aspects, the activation MAC-CE may not carry candidate IDs configured in the list for other PCIs.

[0075] In addition, the downlink or uplink beam ID may include a downlink or uplink TCI state ID and / or a spatial relationship information ID. The PL RS ID may refer to a PL RS used for uplink power control of an uplink beam. In addition, in the case of carrier aggregation, the beam ID or PL RS ID and the corresponding PCI activated for each PCI may be applied to multiple component carriers (CCs), which may be indicated in the CC list configured by radio resource control (RRC) signaling. For example, if the activation MAC-CE indicates a serving cell ID to be applied with the activation command, and the indicated serving cell ID is included in the CC list configured by RRC, the activated ID may be applied to each CC in the CC list.

[0076] In addition, aspects of the present disclosure may help the UE identify the PCI associated with each configured beam ID and / or PL RS ID. In some aspects, the PCI associated with the beam ID (e.g., TCI state ID and / or spatial relationship information ID) may be determined by the PCI of the synchronization signal block (SSB) as the root quasi-co-located (QCL) source of the indicated beam. In addition, for a TCI state with an SSB as the QCL source, the PCI associated with the TCI state may be the PCI of the SSB. In addition, for a TCI state without an SSB as the QCL source, the associated PCI may be the PCI of the SSB that is the root in the QCL chain for the TCI state.

[0077] In some cases, the PCI associated with a beam ID can be explicitly configured along with the beam ID (e.g., TCI state ID and / or spatial relation information ID). For example, the PCI can be indicated as a separate field in each configured downlink or uplink TCI state or spatial relation information, regardless of whether the beam indication RS in the TCI state or spatial relation information is in a specific SSB.

[0078] In some aspects, multiple PDSCH TCI states can be activated for each PCI to reduce the number of TCI codepoint bits in the DCI. PDSCH TCI states can also be activated on multiple CCs to reduce the number of MAC-CE bits. To further reduce the number of MAC-CE bits, the actual PCI (e.g., 10 bits) can be replaced by a PCI ID with a smaller number of bits. For example, for a specific PCI configured in L1 measurement, the PCI set can be mapped to the PCI ID based on the order in the set. For example, when PCIs 0, 3, and 4 are configured in L1 measurement and each full PCI ID has 10 bits, the PCI IDs can be mapped to 0, 1, and 2 in the activated MAC-CE based on their order in the L1 measurement set, rather than using the 10-bit full PCI ID for each PCI. In addition, the MAC-CE can be activated in the configured TCI state associated with the indicated PCI to reduce the amount of overhead. For example, a specific TCI state can be mapped to the lowest configured TCI ID for the indicated PCI.

[0079] Figure 6 is the structure of MAC-CE 600. More specifically, Figure 6 FIG. 6 shows a MAC-CE 600 including a bitmap of multiple resources. Figure 6 As shown, MAC-CE 600 includes a plurality of fields or bits arranged in different octets (eg, octet 601, octet 602, octet 603, and octet N). Figure 6 For example, in octet 601, it is shown that the PCI ID field 610 may be one (1) bit, the serving cell ID field 620 may be five (5) bits, and the BWP ID field 630 may be two (2) bits. The TCI status may be in the form of a bitmap, where each bit corresponds to a TCI status ID. For example, TCI status IDs T0 to T7 may be in octet 602. Additionally, TCI status IDs T8 to T9 may be in the form of a bitmap. 15 It can be in octet 603. Figure 6 As shown, the TCI status can be up to T in octet N. (N-2)x8+7. The TCI state in the MAC-CE may correspond to the TCI state configured in the list for the PCI indicated in the MAC-CE. For example, up to 64 TCI states may be configured in the list for one PCI ID. Bit T0 may correspond to the lowest TCI state ID in the list configured for the PCI ID. When a bit in the bitmap is indicated as 1 in the MAC-CE, the TCI ID corresponding to the bit may be activated, otherwise the TCI ID may not be activated. When there are multiple TCI states activated for the PCI ID in the MAC-CE, the TCI code point associated with the PCI in the DCI may be mapped to the TCI state activated for the PCI ID in the MAC-CE. As Figure 6 As shown, to reduce the amount of MAC-CE bits, the actual PCI may be replaced by a PCI ID field (e.g., PCI ID field 610) having a smaller amount of bits, e.g., one (1) bit in MAC-CE 600 may indicate one of the two configured PCI IDs.

[0080] Figure 7 7 is a diagram 700 illustrating example communications between a UE 702 and a cell or base station 704 . Figure 7 The diagram 700 includes a UE 702 and a cell or base station 704 (including a plurality of different PCIs, such as PCI 0 to PCI 9). The diagram 700 also includes a PCI for L3 measurements 706 and a PCI for L1 measurements 708.

[0081] Figure 7 The beam switching process that can reduce the MAC-CE bit amount is shown. For example, the actual PCI can be replaced by a PCI ID with a smaller bit amount. Figure 7 As shown, for a specific PCI (e.g., PCI 0, PCI 3, and PCI 4) in L1 measurement 708, the PCI set can be mapped to a PCI ID based on the order in the set. For example, the PCI set can be mapped to PCI ID 0, PCI ID 1, or PCI ID 2. In addition, MAC-CE can be activated in the configured TCI state associated with the indicated PCI to reduce the amount of overhead. In addition, a specific TCI state (e.g., T_0) can be mapped to the lowest configured TCI ID of the indicated PCI (e.g., PCI 0).

[0082] Figure 8 8 is a diagram 800 illustrating example communications between a UE 802 and a cell or base station 804 .

[0083] At 810, cell 804 may send DCI (e.g., DCI 812) to a UE (e.g., UE 802), the DCI indicating at least one of a transmission configuration indication (TCI) state, a path loss (PL) reference signal (RS) identifier (ID), or a spatial relation information ID, wherein at least one of the TCI state, the PL RS ID, or the spatial relation information ID corresponds to at least one physical cell identity (PCI), the at least one PCI being associated with the cell.

[0084] At 820, UE 802 may receive DCI (e.g., DCI 812) from a first cell (e.g., cell 804) among a plurality of cells, the DCI indicating at least one of a plurality of transmission configuration indication (TCI) states, a plurality of path loss (PL) reference signal (RS) identifiers (IDs), or a plurality of spatial relation information IDs, wherein at least one of the plurality of TCI states, the plurality of PL RS IDs, or the plurality of spatial relation information IDs corresponds to one or more physical cell identities (PCIs), each of the one or more PCIs being associated with one of the plurality of cells.

[0085] At 830, cell 804 may transmit a medium access control (MAC) control element (MAC-CE) (e.g., MAC-CE 832) indicating at least one PCI associated with the cell. At 840, UE 802 may receive a medium access control (MAC) control element (MAC-CE) (e.g., MAC-CE 832) indicating a first PCI associated with a first cell. In some aspects, the MAC-CE may include multiple codepoints of a PCI field, and the first PCI may be associated with the first cell corresponding to at least one codepoint of the multiple codepoints.

[0086] At 850, UE 802 may determine a first PCI associated with a first cell from among one or more PCIs based on at least one of a first TCI state among a plurality of TCI states, a first PLRS ID among a plurality of PL RS IDs, or a first spatial relationship information ID among a plurality of spatial relationship information IDs, where the at least one of the first TCI state, the first PL RS ID, or the first spatial relationship information ID corresponds to the first PCI. The at least one of the first TCI state, the first PL RS ID, or the first spatial relationship information ID may be indicated by a codepoint.

[0087] In some aspects, the first PCI may be determined based on a synchronization signal block (SSB) of the first beam. Furthermore, the SSB of the first beam may correspond to a quasi-co-located (QCL) source of the first beam, and the first PCI may correspond to the PCI of the SSB. The PCI of the SSB may be associated with the root of the quasi-co-located (QCL) chain of the first TCI state. Furthermore, the first PCI may be configured with at least one of the first TCI state or the first spatial relationship information ID. The first PCI may be indicated by a field of the first TCI state or a field of the first spatial relationship information ID.

[0088] In addition, at least one of the first TCI state or the first spatial relationship information ID may correspond to a beam ID of the first beam. The first TCI state may correspond to the lowest TCI state among multiple TCI states. In addition, the first PCI associated with the first cell may correspond to one or more component carriers (CCs). The one or more CCs may be indicated in a CC list via radio resource control (RRC) signaling. In addition, the first cell may correspond to one or more transmit reception points (TRPs).

[0089] At 860, UE 802 may communicate with a first cell (e.g., cell 804) on a first beam based on the determined first PCI associated with the first cell. At 870, cell 804 may communicate with a UE (e.g., UE 802) on the first beam based on at least one PCI associated with the cell.

[0090] Figure 9 900 is a flow chart of a method of wireless communication. The method may be performed by a UE or a component thereof (e.g., UE 104, 350, 802; device 1102; a processing system, which may include memory 360 and may be the entire UE or a component thereof, such as TX processor 368, controller / processor 359, transmitter 354TX, antenna 352, etc.). Optional aspects are shown in dashed lines. The methods described herein may provide multiple benefits, such as improved communication signaling, resource utilization, and / or power conservation.

[0091] At 902, an apparatus may receive DCI from a first cell of a plurality of cells, the DCI indicating at least one of a plurality of transmission configuration indication (TCI) states, a plurality of path loss (PL) reference signal (RS) identifiers (IDs), or a plurality of spatial relation information IDs, the at least one of the plurality of TCI states, the plurality of PL RS IDs, or the plurality of spatial relation information IDs corresponding to one or more physical cell identities (PCIs), each of the one or more PCIs being associated with one of the plurality of cells, as in combination with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 For example, 902 can be performed by the determination component 1140.

[0092] At 904, the apparatus may receive a medium access control (MAC) control element (MAC-CE) indicating a first PCI associated with a first cell, such as in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 For example, 904 may be performed by determining component 1140. In some aspects, the MAC-CE may include multiple code points of the PCI field, and the first PCI associated with the first cell corresponds to at least one code point of the multiple code points, such as in combination with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As described in the examples.

[0093] At 906, the apparatus may determine a first PCI associated with the first cell from among the one or more PCIs based on at least one of a first TCI state from among a plurality of TCI states, a first PLRS ID from among a plurality of PL RS IDs, or a first spatial relationship information ID from among a plurality of spatial relationship information IDs, the first TCI state, the first PL RS ID, or the first spatial relationship information ID corresponding to the first PCI, as described in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 For example, 906 may be performed by the determining component 1140. At least one of the first TCI state, the first PL RS ID, or the first spatial relationship information ID may be indicated by a code point, such as in combination with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As described in the examples.

[0094] In some aspects, the first PCI can be determined based on a synchronization signal block (SSB) of the first beam, such as in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 In addition, the SSB of the first beam may correspond to a quasi-co-located (QCL) source of the first beam, and the first PCI may correspond to the PCI of the SSB, as described in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 The PCI of the SSB may be associated with the root of the quasi-co-located (QCL) chain of the first TCI state, as described in the example of FIG. Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 In addition, the first PCI may be configured with at least one of the first TCI state or the first spatial relationship information ID, as described in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 The first PCI may be indicated by a field of the first TCI state or a field of the first spatial relationship information ID, as shown in combination with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As described in the examples.

[0095] In addition, at least one of the first TCI state or the first spatial relationship information ID may correspond to the beam ID of the first beam, such as in combination with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 The first TCI state may correspond to the lowest TCI state among the plurality of TCI states, as described in the example of FIG. Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 In addition, the first PCI associated with the first cell may correspond to one or more component carriers (CCs), as described in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As described in the example in Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As described in the example of , one or more CCs may be indicated in the CC list via radio resource control (RRC) signaling. In addition, the first cell may correspond to one or more transmit reception points (TRPs), as described in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As described in the examples.

[0096] At 908, the apparatus may communicate with the first cell on a first beam based on the determined first PCI associated with the first cell, such as in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 For example, 908 can be performed by the determination component 1140.

[0097] Figure 10 1000 is a flow chart of a method of wireless communication. The method may be performed by a cell or base station or a component of a cell or base station (e.g., base station 102, 180, 310, 804; device 1202; a processing system, which may include memory 376 and may be the entire base station or a component of a base station, such as antenna 320, receiver 318RX, RX processor 370, controller / processor 375, etc.). Optional aspects are shown in dashed lines. The methods described herein may provide multiple benefits, such as improved communication signaling, resource utilization, and / or power conservation.

[0098] At 1002, an apparatus may transmit downlink control information (DCI) to a user equipment (UE), the DCI indicating at least one of a transmission configuration indication (TCI) state, a path loss (PL) reference signal (RS) identifier (ID), or a spatial relation information ID, the at least one of the TCI state, the PL RS ID, or the spatial relation information ID corresponding to at least one physical cell identity (PCI), the at least one PCI being associated with a cell, as in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 For example, 1002 may be performed by the determining component 1240. At least one of the TCI state, PL RS ID, or spatial relationship information ID may be indicated by a code point, such as in combination with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As described in the examples.

[0099] In some aspects, at least one PCI can be based on a synchronization signal block (SSB) of a first beam, such as in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 The SSB of the first beam may correspond to a quasi-co-located (QCL) source of the first beam, and at least one PCI may correspond to a PCI of the SSB, as described in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 Furthermore, the PCI of the SSB can be associated with the root of the quasi-co-located (QCL) chain of TCI states, as described in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 In addition, at least one PCI may be configured with at least one of a TCI state or a spatial relationship information ID, as described in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 At least one PCI may be indicated by a field of the TCI status or a field of the spatial relationship information ID, such as in combination with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As described in the examples.

[0100] At 1004, the apparatus may transmit a medium access control (MAC) control element (MAC-CE) indicating at least one PCI associated with a cell, such as in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 For example, 1004 may be performed by determining component 1240. The MAC-CE may include multiple code points of the PCI field, and at least one PCI may be associated with a cell corresponding to at least one code point in the multiple code points, as described in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As described in the examples.

[0101] In some aspects, at least one of the TCI state or the spatial relationship information ID may correspond to the beam ID of the first beam, such as in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 The TCI state may correspond to the lowest TCI state among multiple TCI states, such as the one in combination with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8Furthermore, at least one PCI associated with a cell may correspond to one or more component carriers (CCs), as described in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 One or more CCs may be indicated in a CC list via radio resource control (RRC) signaling, such as in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 In addition, a cell may correspond to one or more transmit receive points (TRPs), as described in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As described in the examples.

[0102] At 1006, the apparatus may communicate with the UE on a first beam based on at least one PCI associated with the cell, such as in conjunction with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 For example, 1006 can be performed by the determination component 1240.

[0103] Figure 11Figure 1100 illustrates an example of a hardware implementation for a device 1102. Device 1102 is a UE and includes a cellular baseband processor 1104 (also known as a modem) coupled to a cellular RF transceiver 1122 and one or more subscriber identity modules (SIM) cards 1120; an application processor 1106 coupled to a secure digital (SD) card 1108 and a screen 1110; a Bluetooth module 1112; a wireless local area network (WLAN) module 1114; a global positioning system (GPS) module 1116; and a power supply 1118. Cellular baseband processor 1104 communicates with UE 104 and / or BS 102 / 180 via cellular RF transceiver 1122. Cellular baseband processor 1104 may include computer-readable media / memory. The computer-readable media / memory may be non-transitory. Cellular baseband processor 1104 is responsible for general processing, including executing software stored on the computer-readable media / memory. When executed by the cellular baseband processor 1104, the software causes the cellular baseband processor 1104 to perform the various functions described above. The computer-readable medium / memory may also be used to store data that is manipulated by the cellular baseband processor 1104 when executing the software. The cellular baseband processor 1104 also includes a receiving component 1130, a communication manager 1132, and a transmitting component 1134. The communication manager 1132 includes one or more of the components shown. The components within the communication manager 1132 may be stored in the computer-readable medium / memory and / or configured as hardware within the cellular baseband processor 1104. The cellular baseband processor 1104 may be a component of the UE 350 and may include a memory 360 and / or at least one of a TX processor 368, an RX processor 356, and a controller / processor 359. In one configuration, the device 1102 may be a modem chip and include only the baseband processor 1104, while in another configuration, the device 1102 may be the entire UE (e.g., see Figure 3 350), and includes the aforementioned additional modules of device 1102.

[0104] The communication manager 1132 includes a determining component 1140 configured to receive downlink control information (DCI) from a first cell of the plurality of cells, the DCI indicating at least one of a plurality of transmission configuration indication (TCI) states, a plurality of path loss (PL) reference signal (RS) identifiers (IDs), or a plurality of spatial relation information IDs, the plurality of TCI states, the plurality of PL RS IDs, or the plurality of spatial relation information IDs corresponding to one or more physical cell identities (PCIs), each of the one or more PCIs associated with one of the plurality of cells, e.g., as described above in connection with step 902. The determining component 1140 may also be configured to determine a first PCI associated with the first cell of the one or more PCIs based on at least one of a first TCI state of the plurality of TCI states, a first PL RS ID of the plurality of PL RS IDs, or a first spatial relation information ID of the plurality of spatial relation information IDs, the first TCI state, the first PL RS ID, or the first spatial relation information ID corresponding to the first PCI, e.g., as described above in connection with step 906. The determining component 1140 may also be configured to communicate with the first cell on the first beam based on the determined first PCI associated with the first cell, eg, as described in conjunction with step 908 above.

[0105] The apparatus may include executing the aforementioned Figure 8 and Figure 9 The additional components of each block of the algorithm in the flowchart. Figure 8 and 9 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, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0106] In one configuration, apparatus 1102, and in particular, cellular baseband processor 1104, includes means for receiving downlink control information (DCI) from a first cell among a plurality of cells, the DCI indicating at least one of a plurality of transmission configuration indication (TCI) states, a plurality of path loss (PL) reference signal (RS) identifiers (IDs), or a plurality of spatial relation information IDs, wherein at least one of the plurality of TCI states, the plurality of PL RS IDs, or the plurality of spatial relation information IDs corresponds to one or more physical cell identities (PCIs), each of the one or more PCIs being associated with one of the plurality of cells. Apparatus 1102 may also include means for determining a first PCI associated with the first cell among the one or more PCIs based on at least one of a first TCI state among the plurality of TCI states, a first PL RS ID among the plurality of PL RS IDs, or a first spatial relation information ID among the plurality of spatial relation information IDs, wherein at least one of the first TCI state, the first PL RS ID, or the first spatial relation information ID corresponds to the first PCI. Apparatus 1102 may also include means for communicating with the first cell on a first beam based on the determined first PCI associated with the first cell. The aforementioned means may be one or more of the aforementioned components of the apparatus 1102, which are configured to perform the functions listed in the aforementioned means. As described above, the apparatus 1102 may include a TX processor 368, an RX processor 356, and a controller / processor 359. Thus, in one configuration, the aforementioned means may be the TX processor 368, the RX processor 356, and the controller / processor 359, which are configured to perform the functions listed in the aforementioned means.

[0107] Figure 12Figure 1200 illustrates an example of a hardware implementation for apparatus 1202. Apparatus 1202 is a base station and includes a baseband unit 1204. Baseband unit 1204 can communicate with UE 104 via a cellular RF transceiver. Baseband unit 1204 may include computer-readable media / memory. Baseband unit 1204 is responsible for general processing, including executing software stored on the computer-readable media / memory. When executed by baseband unit 1204, the software enables baseband unit 1204 to perform the various functions described above. The computer-readable media / memory may also be used to store data manipulated by baseband unit 1204 when executing the software. Baseband unit 1204 also includes a receiving component 1230, a communication manager 1232, and a transmitting component 1234. Communication manager 1232 includes one or more of the components shown. Components within communication manager 1232 may be stored in computer-readable media / memory and / or configured as hardware within baseband unit 1204. The baseband unit 1204 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 .

[0108] The communication manager 1232 includes a determining component 1240 configured to send downlink control information (DCI) to a user equipment (UE), the DCI indicating at least one of a transmission configuration indication (TCI) state, a path loss (PL) reference signal (RS) identifier (ID), or a spatial relation information ID, wherein the at least one of the TCI state, the PL RS ID, or the spatial relation information ID corresponds to at least one physical cell identity (PCI), the at least one PCI being associated with a cell, e.g., as described above in connection with step 1002. The determining component 1240 may also be configured to communicate with the UE on a first beam based on the at least one PCI associated with the cell, e.g., as described above in connection with step 1006.

[0109] The apparatus may include executing the aforementioned Figure 8 and Figure 10 The additional components of each block of the algorithm in the flowchart. Figure 8 and Figure 10 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, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0110] In one configuration, apparatus 1202, and in particular baseband unit 1204, includes means for transmitting downlink control information (DCI) to a user equipment (UE), the DCI indicating at least one of a transmission configuration indication (TCI) state, a path loss (PL) reference signal (RS) identifier (ID), or a spatial relation information ID, wherein at least one of the TCI state, the PL RS ID, or the spatial relation information ID corresponds to at least one physical cell identity (PCI), the at least one PCI associated with a cell. Apparatus 1202 may also include means for communicating with the UE on a first beam based on the at least one PCI associated with the cell. The aforementioned means may be one or more of the aforementioned components of apparatus 1202, configured to perform the functions recited by the aforementioned means. As described above, apparatus 1202 may include TX processor 316, RX processor 370, and controller / processor 375. Thus, in one configuration, the aforementioned means may be TX processor 316, RX processor 370, and controller / processor 375, configured to perform the functions recited by the aforementioned means.

[0111] It should be understood that the specific order or hierarchy of blocks in the disclosed process / flowchart is illustrative of exemplary methods. Based on design preferences, it should be understood that the specific order or hierarchy of blocks in the process / flowchart can be rearranged. In addition, some blocks can be combined or omitted. The accompanying method claims present the elements of the various blocks in an exemplary order, but are not meant to be limited to the specific order or hierarchy presented.

[0112] The foregoing description is intended to enable anyone skilled in the art to practice the various aspects described herein. Those skilled in the art will readily appreciate various modifications to these aspects, and the general principles defined herein apply to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but rather to conform to the full scope consistent with the language claims, wherein, unless otherwise stated, elements in the singular are not intended to mean "one and only one," but rather "one or more." The word "exemplary" as used herein means "serving as an example, instance, or illustration." Any aspect described herein as "exemplary" is not necessarily to be construed as being preferred or more advantageous than other aspects. Unless otherwise specified, 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 A, B, and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof" include any combination of A, B, and / or C, and may include multiple A, multiple B, or multiple C. Specifically, phrases such as "at least one of A, B, or C," "A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," 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, wherein any such combination may include one or more of the members of A, B, or C. All structural and functional equivalents to the elements of the various aspects described in this disclosure that are known or later become known to one of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is expressly stated in the claims. The words "module," "mechanism," "element," "device," and the like are not intended to replace the word "component." Therefore, no claim element is to be interpreted as part-plus-function unless the claim element is expressly stated using the phrase "component for..."

Claims

1. A method for wireless communication of a user equipment (UE), comprising: receiving downlink control information (DCI) from a first cell among a plurality of cells, the DCI indicating at least one of a plurality of transmission configuration indication (TCI) states, a plurality of path loss (PL) reference signal (RS) identifiers (IDs), or a plurality of spatial relation information (IDs), wherein at least one of the plurality of TCI states, the plurality of PL RS IDs, or the plurality of spatial relation information (IDs) corresponds to one or more physical cell identities (PCIs), each of the one or more PCIs being associated with one of the plurality of cells; determining a first PCI associated with a first cell among one or more PCIs based on at least one of a first TCI state among a plurality of TCI states, a first PL RS ID among a plurality of PL RS IDs, or a first spatial relation information ID among a plurality of spatial relation information IDs, wherein at least one of the first TCI state, the first PL RS ID, or the first spatial relation information ID corresponds to the first PCI, wherein the at least one of the first TCI state, the first PL RS ID, or the first spatial relation information ID is indicated by a codepoint that is a local index in an activated ID; as well as Communicate with the first cell on a first beam based on the determined first PCI associated with the first cell.

2. The method according to claim 1, wherein The first PCI is determined based on the synchronization signal block SSB of the first beam.

3. The method according to claim 2, wherein: The SSB of the first beam corresponds to the quasi-co-located QCL source of the first beam, and the first PCI corresponds to the PCI of the SSB.

4. The method according to claim 2, wherein: The PCI of the SSB is associated with the root of the quasi-co-located QCL chain of the first TCI state.

5. The method according to claim 1, wherein The first PCI is configured with at least one of a first TCI state or a first spatial relationship information ID.

6. The method according to claim 5, wherein: The first PCI is indicated by a field of a first TCI status or a field of a first spatial relationship information ID.

7. The method according to claim 1, wherein At least one of the first TCI state, the first PL RS ID, or the first spatial relation information ID is indicated by a code point.

8. The method according to claim 1, further comprising: A medium access control MAC control element MAC-CE indicating a first PCI associated with a first cell is received.

9. The method according to claim 8, wherein The MAC-CE includes a plurality of code points of a PCI field, and a first PCI associated with the first cell corresponds to at least one code point among the plurality of code points.

10. The method according to claim 1, wherein At least one of the first TCI state or the first spatial relationship information ID corresponds to a beam ID of a first beam.

11. The method according to claim 1, wherein The first TCI state corresponds to a lowest TCI state among a plurality of TCI states.

12. The method according to claim 1, wherein The first PCI associated with the first cell corresponds to one or more component carriers CC.

13. The method according to claim 12, wherein: The one or more CCs are indicated in a CC list via radio resource control RRC signaling.

14. The method according to claim 1, wherein The first cell corresponds to one or more transmitting and receiving points TRP.

15. An apparatus for wireless communication of a user equipment (UE), comprising: Memory; as well as at least one processor coupled to the memory and configured to: receiving downlink control information (DCI) from a first cell among a plurality of cells, the DCI indicating at least one of a plurality of transmission configuration indication (TCI) states, a plurality of path loss (PL) reference signal (RS) identifiers (IDs), or a plurality of spatial relation information (IDs), wherein at least one of the plurality of TCI states, the plurality of PL RS IDs, or the plurality of spatial relation information (IDs) corresponds to one or more physical cell identities (PCIs), each of the one or more PCIs being associated with one of the plurality of cells; determining a first PCI associated with a first cell among one or more PCIs based on at least one of a first TCI state among a plurality of TCI states, a first PL RS ID among a plurality of PL RS IDs, or a first spatial relation information ID among a plurality of spatial relation information IDs, wherein at least one of the first TCI state, the first PL RS ID, or the first spatial relation information ID corresponds to the first PCI, wherein the at least one of the first TCI state, the first PL RS ID, or the first spatial relation information ID is indicated by a codepoint that is a local index in an activated ID; as well as Communicate with the first cell on a first beam based on the determined first PCI associated with the first cell.

16. The device according to claim 15, wherein The first PCI is determined based on the synchronization signal block SSB of the first beam.

17. The device according to claim 16, wherein The SSB of the first beam corresponds to the quasi-co-located QCL source of the first beam, and the first PCI corresponds to the PCI of the SSB.

18. The device according to claim 16, wherein The PCI of the SSB is associated with the root of the quasi-co-located QCL chain of the first TCI state.

19. The device according to claim 15, wherein The first PCI is configured with at least one of a first TCI state or a first spatial relationship information ID.

20. The device according to claim 19, wherein The first PCI is indicated by a field of a first TCI status or a field of a first spatial relationship information ID.

21. The apparatus according to claim 15, wherein At least one of the first TCI state, the first PL RS ID, or the first spatial relation information ID is indicated by a code point.

22. The apparatus according to claim 15, wherein The at least one processor is further configured to: A medium access control MAC control element MAC-CE indicating a first PCI associated with a first cell is received.

23. The device according to claim 22, wherein The MAC-CE includes a plurality of code points of a PCI field, and a first PCI associated with the first cell corresponds to at least one code point among the plurality of code points.

24. The apparatus according to claim 15, wherein At least one of the first TCI state or the first spatial relationship information ID corresponds to a beam ID of a first beam.

25. The apparatus according to claim 15, wherein The first TCI state corresponds to a lowest TCI state among a plurality of TCI states.

26. The apparatus according to claim 15, wherein The first PCI associated with the first cell corresponds to one or more component carriers CC.

27. The device according to claim 26, wherein The one or more CCs are indicated in a CC list via radio resource control RRC signaling.

28. The apparatus according to claim 15, wherein The first cell corresponds to one or more transmitting and receiving points TRP.

29. An apparatus for wireless communication in a cell, comprising: Memory; as well as at least one processor coupled to the memory and configured to: sending downlink control information DCI to a user equipment (UE), the DCI indicating at least one of a transmission configuration indication (TCI) state, a path loss (PL) reference signal (RS) identifier (ID), or a spatial relationship information (ID), wherein at least one of the TCI state, the PL RS ID, or the spatial relationship information (ID) corresponds to at least one physical cell identity (PCI), the at least one PCI being associated with the cell, wherein at least one of the TCI state, the PL RS ID, or the spatial relationship information (ID) is indicated by a code point that is a local index in an activated ID; and Communicate with the UE on a first beam based on at least one PCI associated with the cell.

30. The apparatus according to claim 29, wherein The at least one PCI is based on a synchronization signal block SSB of the first beam.

31. A method for wireless communication of a cell, comprising: sending downlink control information DCI to a user equipment (UE), the DCI indicating at least one of a transmission configuration indication (TCI) state, a path loss (PL) reference signal (RS) identifier (ID), or a spatial relationship information (ID), wherein at least one of the TCI state, the PL RS ID, or the spatial relationship information (ID) corresponds to at least one physical cell identity (PCI), the at least one PCI being associated with the cell, wherein at least one of the TCI state, the PL RS ID, or the spatial relationship information (ID) is indicated by a code point that is a local index in an activated ID; and Communicate with the UE on a first beam based on at least one PCI associated with the cell.

32. A computer-readable storage medium having stored thereon instructions that, when executed, cause one or more processors to perform the method of any one of claims 1-14 and 31.

33. A computer program product comprising computer readable instructions which, when executed by a processor, cause the processor to perform the method according to any one of claims 1-14 and 31.

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