Medium access control (MAC) control element (CE) spatial relation information update for sounding reference signal (SRS)

Abstract

This disclosure relates to updating spatial relation information of a Media Access Control (MAC) control element (CE) for a probe reference signal (SRS). Specifically, a user equipment (UE) may perform the following operations: receive a MAC CE from a network entity, the MAC CE indicating a set of synchronization signal blocks (SSBs) and an SSB index within that SSB set that serves as a reference signal (RS) for configuring spatial relation information of SRS resources, wherein the UE is configured with multiple SSB sets corresponding to multiple physical cell identifiers (PCIs) in the serving cell; and update spatial relation information for one or more SRS resources within the SRS resource set based on the MAC CE.

Description

[0001] Cross-reference to related applications

[0002] This application claims the benefit of U.S. Provisional Application No. 63 / 054,158, filed July 20, 2020, entitled “MEDIA ACCESS CONTROL (MAC) CONTROL ELEMENT (CE) SPATIAL RELATION INFORMATION UPDATE FOR SOUNDING REFERENCE SIGNAL (SRS)”; and U.S. Patent Application No. 17 / 379,556, filed July 19, 2021, entitled “MEDIA ACCESS CONTROL (MAC) CONTROL ELEMENT (CE) SPATIAL RELATION INFORMATION UPDATE FOR SOUNDING REFERENCE SIGNAL (SRS)”, which has been assigned to the assignee of this application and is expressly incorporated herein by reference. Technical Field

[0003] In summary, various aspects of this disclosure relate to wireless communication systems, and more specifically, various aspects of this disclosure relate to updating spatial relation information of a Medium Access Control (MAC) control element (CE) for a probe reference signal (SRS). Background Technology

[0004] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, and broadcasting. These systems can be multiple access systems capable of supporting communication with multiple users by sharing available system resources such as time, frequency, and power. Examples of such multiple access systems 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, and Single Carrier Frequency Division Multiple Access (SC-FDMA) systems.

[0005] These multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different wireless devices to communicate at the city, national, regional, and even global levels. For example, fifth-generation (5G) wireless communication technology (which may be referred to as NR) is envisioned to extend and support a wide variety of use cases and applications related to current generations of mobile networks. In some aspects, 5G communication technologies may include: enhanced mobile broadband that addresses human-centric use cases for accessing multimedia content, services, and data; ultra-reliable low-latency communication (URLLC) with certain specifications for latency and reliability; and massive machine-type communication (mMTC) that allows for a considerable number of connected devices and the transmission of relatively low amounts of non-latency-sensitive information.

[0006] For example, for various communication technologies (such as, but not limited to, NR), some implementations may increase transmission speed and flexibility, but also increase transmission complexity. Therefore, improvements in wireless communication operation may be expected. Summary of the Invention

[0007] To provide a basic understanding of one or more aspects, a simplified overview of these aspects is given below. This overview is not an exhaustive summary of all anticipated aspects and is not intended to identify key or important elements of all aspects, nor to depict 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 descriptions that follow.

[0008] One example implementation includes a method for wireless communication at a user equipment (UE), the method comprising: receiving a medium access control (MAC) control element (CE) from a network entity, the MAC CE indicating a set of synchronization signal blocks (SSBs) and an SSB index within the SSB set as spatial relation information for probe reference signal (SRS) resources, wherein the UE is configured with multiple SSB sets corresponding to multiple physical cell identifiers (PCIs) in a serving cell; and updating the spatial relation information for one or more SRS resources within the SRS resource set based on the MAC CE.

[0009] In a further example, an apparatus for wireless communication is provided, comprising: a transceiver; a memory configured to store instructions; and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to execute instructions to perform the following operations: receiving a MAC CE from a network entity, the MAC CE indicating an SSB set and an SSB index within the SSB set as spatial relation information for SRS resources, wherein the UE is configured with multiple SSB sets corresponding to multiple PCIs in the serving cell; and updating the spatial relation information for one or more SRS resources within the SRS resource set based on the MAC CE.

[0010] In another aspect, an apparatus for wireless communication is provided, the apparatus comprising: a unit for receiving a MAC CE from a network entity, the MAC CE indicating an SSB set and an SSB index of an RS within the SSB set as spatial relation information for SRS resources, wherein a UE is configured with multiple SSB sets corresponding to multiple PCIs in a serving cell; and a unit for updating spatial relation information for one or more SRS resources within the SRS resource set based on the MAC CE.

[0011] In another aspect, a non-transitory computer-readable medium is provided, comprising code executable by one or more processors to perform the following operations: receiving a MAC CE from a network entity, the MAC CE indicating an SSB set and an SSB index within the SSB set as spatial relation information for SRS resources, wherein the UE is configured with multiple SSB sets corresponding to multiple PCIs in the serving cell; and updating spatial relation information for one or more SRS resources within the SRS resource set based on the MAC CE.

[0012] To achieve the foregoing and related objectives, one or more aspects include the features fully described below and specifically pointed out in the claims. The following description and drawings set forth certain illustrative features of one or more aspects in detail. However, these features indicate only a few of the various ways in which the principles of each aspect can be employed, and this description is intended to include all such aspects and their equivalents. Attached Figure Description

[0013] The disclosed aspects will be described below in conjunction with the accompanying drawings, which are provided for illustrative purposes and not for limiting the scope of the disclosure, wherein the same names denote the same elements, and in the drawings:

[0014] Figure 1 An example of a wireless communication system is shown.

[0015] Figure 2 This is a block diagram showing an example of a network entity (also referred to as a base station).

[0016] Figure 3 This is a block diagram illustrating an example of a user equipment (UE).

[0017] Figure 4 This is an example representation of a Media Access Control (MAC) control element (CE) used for activating / deactivating a Semi-Persistent Probe Reference Signal (SRS) resource set.

[0018] Figure 5 This is an example representation of MAC CE used for indicating spatial relationships in aperiodic SRS.

[0019] Figure 6 An example representation of the location of the synchronization signal block (SSB) within a 5-millisecond (ms) half-frame is shown.

[0020] Figure 7 An example representation of a MAC CE using the Resource Bandwidth Part (BWP) Identifier (ID) field and the Reserved field is shown.

[0021] Figure 8 An example representation of a MAC CE using one or more Synchronization Signal Block (SSB) ID fields is shown.

[0022] Figure 9 This is a flowchart of an example method for wireless communication at the UE.

[0023] Figure 10 This is a block diagram illustrating an example of a multiple-input multiple-output (MIMO) communication system including a base station and a UE. Detailed Implementation

[0024] The various aspects will now be described with reference to the accompanying drawings. In the following description, numerous specific details are set forth for illustrative purposes in order to provide a thorough understanding of one or more aspects. However, it will be apparent, however, that such aspects can be implemented without these specific details.

[0025] In summary, the described features relate to updating the spatial relation information of the Medium Access Control (MAC) control element (CE) for the Sounding Reference Signal (SRS). Specifically, spatial relation information can be configured per SRS resource via Radio Resource Control (RRC). The reference signal (RS) used for the spatial relation information of the SRS resource can be at least one of the following: an SSB index (e.g., 0-63 for FR2, 0-7 for FR1) (the UE can transmit a target SRS resource with the same spatial domain transmission filter for receiving a Reference Synchronization Signal Block (SSB); a CSI-RS resource (the UE should transmit a target SRS resource with the same spatial domain transmission filter for receiving a Reference Channel State Information Reference Signal (CSI-RS) resource); and an SRS resource (e.g., the UE can transmit a target SRS resource with the same spatial domain transmission filter for transmitting a reference SRS resource). The ServingCellId / uplinkBWP (e.g., for the SRS) is used for the reference resource, and if not configured, the reference resource is the same as the target SRS. For example, a set of SRS resources can include multiple SRS resources. The SRS resource set can be at least one of the following: periodic (e.g., configured by RRC), semi-persistent (e.g., activated / deactivated by MAC-CE), or aperiodic (e.g., triggered by downlink control information (DCI)).

[0026] In one aspect, the set of PCI / SSBs for a given serving cell is determined through a cell search procedure. For example, a non-serving cell PCI can be configured via dedicated RRC signaling for the serving cell / component carrier (CC) (e.g., Pcell or Scell). A secondary SSB set is configured for the UE associated with the non-serving cell PCI, thereby allowing multiple TRP operations within a serving cell when a second TRP has a different PCI (e.g., inter-cell multiple TRP). Further, a list of additional PCI / SSB sets in a given serving cell (i.e., multiple secondary (or non-serving cell) PCI / SSB sets) is provided. In this case, the reference signal for spatial relationship information of SRS resources can be an SSB index from one of the secondary SSB sets in the serving cell.

[0027] For example, in one aspect, this disclosure includes a method, apparatus, and computer-readable medium for efficient wireless communication updating of spatial relation information for SRS via MAC-CE. Specifically, when the RS used for spatial relation information of SRS resources is an SSB index, the corresponding SSB set to which the SSB index belongs also needs to be indicated in the MAC-CE. This aspect may include: receiving a MAC-CE from a network entity, the MAC-CE indicating an SSB set and an SSB index within the SSB set that serves as spatial relation information for SRS resources, wherein the UE is configured with multiple SSB sets corresponding to multiple PCIs in the serving cell; and updating spatial relation information for one or more SRS resources within the SRS resource set based on the MAC-CE.

[0028] As used in this application, the terms "component," "module," "system," etc., are intended to include computer-related entities, such as, but not limited to, hardware, software, combinations of hardware and software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, a thread of execution, a program, or a computer. By way of illustration, both an application running on a computing device and the computing device can be components. One or more components may reside within a process or a thread of execution, and components may reside on a single computer or be distributed across two or more computers. Furthermore, these components may be executed from various computer-readable media having various data structures stored thereon. Components may communicate, for example, via signals having one or more data packets (e.g., data from a component that interacts with another component in a local system, a distributed system, or with other systems across a network such as the Internet). Whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc.

[0029] The technologies described herein can be used in various wireless communication systems, such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and others. The terms "system" and "network" are often used interchangeably. CDMA systems can implement radio technologies such as CDMA2000 and Universal Terrestrial Radio Access (UTRA). CDMA2000 encompasses the IS-2000, IS-95, and IS-856 standards. IS-2000 versions 0 and A are commonly referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High-Speed ​​Packet Data (HRPD), etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. TDMA systems can implement radio technologies such as the Global System for Mobile Communications (GSM). OFDMA systems can implement technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, and Flash OFDM. TM Radio technologies such as UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) and Improved LTE (LTE-A) are newer versions of UMTS using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called the Third Generation Partnership Project (3GPP). CDMA2000 and UMB are described in documents from an organization called the Third Generation Partnership Project 2 (3GPP2). The technologies described herein can be used in the systems and radio technologies mentioned above, as well as other systems and radio technologies (including cellular communications such as LTE) on shared radio frequency spectrum bands). However, for illustrative purposes, the following description focuses on LTE / LTE-A systems, and the term LTE is used in much of the following description, but the technologies described are applicable beyond LTE / LTE-A applications (such as fifth-generation (5G) NR networks or other next-generation communication systems).

[0030] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of the elements discussed without departing from the scope of this disclosure. Various processes or components may be omitted, substituted, or added as appropriate in the examples. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with respect to some examples may be combined into other examples.

[0031] Various aspects or features will be given based on a system that may include several devices, components, modules, etc. It should be understood and appreciated that various systems may include additional devices, components, modules, etc., or may not include all the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. Combinations of these methods are also possible.

[0032] Figure 1 An example of a wireless communication system is illustrated. The wireless communication system (also referred to as a Wireless Wide Area Network (WWAN)) includes an access network 100, a base station 102, a UE 104, an evolved packet core (EPC) 160, or a 5G core (5GC) 190. The base station 102 (which may also be referred to as a network entity) may include macro cells (high-power cellular base stations) or small cells (low-power cellular base stations). Macro cells may include base stations. Small cells may include femtocells, picocells, and microcells. In one example, base station 102 may also include a gNB 180, as further described herein.

[0033] In one example, some nodes (such as base station 102 / gNB 180) may have modem 240 and communication component 242 for transmitting various data to UE 104 as described herein. Although base station 102 / gNB 180 is shown as having modem 240 and communication component 242, this is an illustrative example, and essentially any node may include modem 240 and communication component 242 to provide the corresponding functionality described herein.

[0034] In another example, some nodes of a wireless communication system (such as UE 104) may have a modem 340 and a communication component 342 for updating spatial relation information of the Media Access Control (MAC) control element (CE) for the Sounding Reference Signal (SRS), as described herein. Although UE 104 is shown as having a modem 340 and a communication component 342, this is an illustrative example, and essentially any node or any type of node may include a modem 340 and a communication component 342 to provide the corresponding functionality described herein.

[0035] Base station 102 configured for 4G LTE (which may be collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with EPC 160 via backhaul link 132 (such as using the S1 interface). Base station 102 configured for 5G NR (which may be collectively referred to as Next Generation RAN (NG-RAN)) can interface with 5GC 190 via backhaul link 184. Among other functions, base station 102 can also perform one or more of the following functions: transmission of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (such as 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), user and equipment tracking, RAN information management (RIM), paging, location, and delivery of warning messages. Base station 102 can communicate with each other directly or indirectly (e.g., via EPC 160 or 5GC 190) via backhaul link 134 (e.g., using an X2 interface). Backhaul links 132, 134, or 184 can be wired or wireless.

[0036] Base station 102 can wirelessly communicate with one or more UEs 104. Each of base stations 102 can provide communication coverage for a corresponding geographic coverage area 110. Overlapping geographic coverage areas 110 may exist. For example, a small cell 102' may have a coverage area 110' that overlaps with the coverage areas 110 of one or more macro base stations 102. A network that includes both small cells and macro cells can be referred to as a heterogeneous network. The heterogeneous network may also include a Home Evolved Node B (eNB) (HeNB), which can provide services to restricted groups (which may be referred to as a Closed Subscriber Group (CSG)). The communication link 120 between base station 102 and UE 104 may include an uplink (UL) (also referred to as a reverse link) transmission from UE 104 to base station 102 or a downlink (DL) (also referred to as a forward link) transmission from base station 102 to UE 104. The communication link 120 may use multiple-input multiple-output (MIMO) antenna technologies, including spatial multiplexing, beamforming, or transmit diversity. The communication link may be via one or more carriers. Base station 102 / UE 104 may use spectrum of up to Y MHz (such as 5, 10, 15, 20, 100, 400, etc.) bandwidth per carrier allocated in carrier aggregation for transmission in the DL or UL direction, up to a total of YxMHz (such as for x component carriers). Carriers may be adjacent to each other or may not be adjacent to each other. Carrier allocation may be asymmetrical with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL ​​compared to UL). Component carriers may include primary component carriers and one or more secondary component carriers. The primary component carrier may be referred to as the primary cell (PCell), and the secondary component carrier may be referred to as the secondary cell (SCell).

[0037] In another example, some UEs 104 may communicate with each other using device-to-device (D2D) communication link 158. D2D communication link 158 may use DL / UL WWAN spectrum. D2D communication link 158 may use one or more sideline channels, such as the Physical Sideline Broadcast Channel (PSBCH), Physical Sideline Discovery Channel (PSDCH), Physical Sideline Shared Channel (PSSCH), and Physical Sideline Control Channel (PSCCH). D2D communication can be achieved through a variety of wireless D2D communication systems, such as, for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

[0038] The wireless communication system may also include a Wi-Fi access point (AP) 150, which communicates with a Wi-Fi station (STA) 152 via a communication link 154 in the 5 GHz unlicensed spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a free channel assessment (CCA) before communication to determine whether the channel is available.

[0039] Small cell 102' can operate in either licensed or unlicensed spectrum. When operating in unlicensed spectrum, small cell 102' can employ NR and use the same 5GHz unlicensed spectrum as the Wi-Fi AP 150. Small cell 102' employing NR in unlicensed spectrum can improve the coverage or increase the capacity of the access network.

[0040] Base station 102 (whether it is a small cell 102' or a large cell (such as a macro base station)) may include an eNB, gNodeB (gNB), or other types of base stations. Some base stations (e.g., gNB 180) may operate in the conventional sub-6 GHz spectrum, in millimeter wave (mmW) frequencies, or in near-mmW frequencies to communicate with UE 104. When gNB 180 operates in mmW or near-mmW frequencies, gNB 180 may be referred to as an mmW base station. Extremely high frequency (EHF) is a portion of the electromagnetic spectrum that contains radio frequency (RF). EHF has a range from 30 GHz to 300 GHz and wavelengths between 1 mm and 10 mm. Radio waves in this band may be referred to as millimeter waves. Near-mmW can extend down to frequencies of 3 GHz with wavelengths of 100 mm. Ultra-high frequency (SHF) bands extend between 3 GHz and 30 GHz and are also referred to as centimeter waves. Communication using mmW / near-mmW RF bands has extremely high path loss and short range. The mmW base station (which may correspond to gNB 180) can utilize beamforming 182 with UE 104 to compensate for extremely high path loss and short range. The base station 102 mentioned herein may include gNB 180.

[0041] EPC 160 may include Mobility Management Entity (MME) 162, other MMEs 164, Serving Gateway 166, Multimedia Broadcast Multicast Service (MBMS) Gateway 168, Broadcast Multicast Service Center (BM-SC) 170, and Packet Data Network (PDN) Gateway 172. MME 162 can communicate with Home Subscriber Server (HSS) 174. MME 162 is the control node that handles signaling between UE 104 and EPC 160. Typically, MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through Serving Gateway 166, which is itself 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 Service 176. IP Service 176 may include the Internet, intranet, IP Multimedia Subsystem (IMS), PS streaming service, or other IP services. The BM-SC 170 can provide services provisioning and delivery for MBMS users. It can act as an entry point for MBMS transmissions by content providers, authorize and initiate MBMS bearer services within a Public Land Mobile Network (PLMN), and schedule MBMS transmissions. The MBMS gateway 168 can distribute MBMS services to base stations 102 belonging to Multicast-Broadcast Single Frequency Network (MBSFN) areas belonging to broadcast-specific services, and can be responsible for session management (start / stop) and collecting billing information related to eMBMS.

[0042] 5GC 190 may include Access and Mobility Management Functions (AMF) 192, other AMFs 193, Session Management Functions (SMF) 194, and User Plane Functions (UPF) 195. AMF 192 may communicate with Unified Data Management (UDM) 196. AMF 192 may be a control node handling signaling between UE 104 and 5GC 190. Typically, AMF 192 can provide QoS streaming and session management. User Internet Protocol (IP) packets (such as those from one or more UEs 104) can be transmitted via UPF 195. UPF 195 can provide UE IP address allocation for one or more UEs, as well as other functions. UPF 195 connects to IP services 197. IP services 197 may include the Internet, intranets, IP Multimedia Subsystem (IMS), PS streaming services, or other IP services.

[0043] A base station may also be referred to as a gNB, Node B, Evolved Node B (eNB), access point, base transceiver, radio base station, radio transceiver, transceiver functional unit, Basic Service Set (BSS), Extended Service Set (ESS), Transmit / Receive Point (TRP), or some other suitable term. Base station 102 provides UE 104 with access to EPC 160 or 5GC 190. Examples of UE104 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radio units, positioning systems (such as satellite, terrestrial), multimedia devices, video devices, digital audio players (such as MP3 players), cameras, game consoles, tablet devices, smart devices, robots, drones, industrial / manufacturing equipment, wearable devices (such as smartwatches, smart clothing, smart glasses, virtual reality glasses, smart wristbands, smart jewelry (such as smart rings, smart bracelets)), vehicles / vehicle equipment, meters (such as parking meters, electricity meters, gas meters, water meters, flow meters), air pumps, large or small kitchen appliances, medical / healthcare equipment, implants, sensors / actuators, displays, or any other similarly functional devices. Some UE 104 devices may be referred to as IoT devices (such as meters, pumps, monitors, cameras, industrial / manufacturing equipment, appliances, vehicles, robots, drones, etc.). IoT UEs may include MTC / enhanced MTC (eMTC, also known as CAT-M, Cat M1) UEs, NB-IoT (also known as CAT NB1) UEs, and other types of UEs. In this disclosure, eMTC and NB-IoT may refer to future technologies that can evolve from or are based on these technologies. For example, eMTC may include FeMTC (further eMTC), eFeMTC (further enhanced eMTC), mMTC (massive MTC), etc., while NB-IoT may include eNB-IoT (enhanced NB-IoT), FeNB-IoT (further enhanced NB-IoT), etc. UE 104 may also be referred to as a station, mobile station, user station, mobile unit, user unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile user station, access terminal, mobile terminal, radio terminal, remote terminal, handphone, user agent, mobile client, client, or some other suitable term.

[0044] Now go to Figure 2-10 The aspects are described with reference to one or more components and one or more methods that can perform the actions or operations described herein, wherein the aspects in dashed lines may be optional. Although the following text... Figure 9The operations described herein are given in a specific order or as performed by the example components; however, it should be understood that the actions and the order in which components perform actions may vary depending on the implementation. Furthermore, it should be understood that the following actions, functions, or described components may be performed by a specially programmed processor, a processor executing specially programmed software or a computer-readable medium, or by any other combination of hardware or software components capable of performing the described actions or functions.

[0045] Figure 2 This is a block diagram illustrating an example of a network entity (also referred to as a base station). A base station (such as base station 102 or gNB 180, as described above) may include various components, some of which have already been described above and are further described herein, including components such as one or more processors 212 and memory 216 communicating via one or more buses 244, and transceiver 202, which may operate in conjunction with modem 240 or communication component 242.

[0046] In some aspects, one or more processors 212 may include or be part of a modem 240 using one or more modem processors. Therefore, various functions associated with the communication component 242 may be included in the modem 240 or processor 212, and in some aspects, may be performed by a single processor, while in others, different functions may be performed by a combination of two or more different processors. For example, in some aspects, one or more processors 212 may include any one or any combination of: a modem processor, or a baseband processor, or a digital signal processor, or a transmit processor, or a receive processor, or a transceiver processor associated with transceiver 202. In other aspects, some features of one or more processors 212 or modem 240 associated with the communication component 242 may be performed by transceiver 202.

[0047] Furthermore, memory 216 may be configured to store data used herein or a local version of application 275 executed by at least one processor 212, or one or more sub-components of communication component 242 or its sub-components. Memory 216 may include any type of computer-readable medium usable by a computer or at least one processor 212, such as random access memory (RAM), read-only memory (ROM), magnetic tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and any combination thereof. In some aspects, for example, memory 216 may be a non-transitory computer-readable storage medium storing one or more lines of computer-executable code, wherein when base station 102 is operating at least one processor 212 to execute one or more sub-components of communication component 242 or its sub-components, the one or more lines of computer-executable code are used to define one or more sub-components of communication component 242 or its sub-components, or data associated therewith.

[0048] Transceiver 202 may include at least one receiver 206 and at least one transmitter 208. Receiver 206 may include hardware for receiving data or processor-executable software, the code comprising instructions and stored in memory (such as a computer-readable medium). Receiver 206 may be, for example, a radio frequency (RF) receiver. In some aspects, receiver 206 may receive signals transmitted by at least one base station 102. Additionally, receiver 206 may process these received signals and may also obtain measurements of the signals, such as, but not limited to, Ec / Io, signal-to-noise ratio (SNR), reference signal received power (RSRP), received signal strength indicator (RSSI), etc. Transmitter 208 may include hardware for transmitting data or processor-executable software, the code comprising instructions and stored in memory (such as a computer-readable medium). Suitable examples of transmitter 208 may include, but are not limited to, RF transmitters.

[0049] Furthermore, in some aspects, base station 102 may include an RF front-end 288, which can operate communicatively with one or more antennas 265 and transceiver 202 for receiving and transmitting radio transmissions, such as wireless communications transmitted by at least one base station 102 or wireless transmissions transmitted by UE 104. The RF front-end 288 may be connected to one or more antennas 265 and may include one or more low-noise amplifiers (LNAs) 290, one or more switches 292, one or more power amplifiers (PAs) 298, and one or more filters 296 for transmitting and receiving RF signals. Antenna 265 may include one or more antennas, antenna elements, or antenna arrays.

[0050] In some aspects, the LNA 290 can amplify the received signal to a desired output level. In some aspects, each LNA 290 can have a specified minimum gain value and a maximum gain value. In some aspects, the RF front end 288 can use one or more switches 292 to select a particular LNA 290 and its specified gain value based on the desired gain value for a particular application.

[0051] Furthermore, for example, the RF front end 288 may use one or more PAs 298 to amplify the signal for the RF output to the desired output power level. In some aspects, each PA 298 may have a specified minimum gain value and a maximum gain value. In some aspects, the RF front end 288 may use one or more switches 292 to select a particular PA 298 and its specified gain value based on the desired gain value for a particular application.

[0052] Furthermore, for example, the RF front-end 288 may use one or more filters 296 to filter the received signal to obtain the input RF signal. Similarly, in some aspects, for example, the output from the corresponding PA 298 may be filtered using a corresponding filter 296 to produce an output signal for transmission. In some aspects, each filter 296 may be connected to a specific LNA 290 or PA 298. In some aspects, the RF front-end 288 may use one or more switches 292 to select the transmit or receive path using a specified filter 296, LNA 290, or PA 298 based on a configuration specified by the transceiver 202 or processor 212.

[0053] Therefore, transceiver 202 can be configured to transmit and receive wireless signals via RF front-end 288 and one or more antennas 265. In some aspects, the transceiver can be tuned to operate at a specified frequency, enabling UE 104 to communicate with, for example, one or more base stations 102 or one or more cells associated with one or more base stations 102. In some aspects, for example, modem 240 can configure transceiver 202 to operate at a specified frequency and power level based on UE configuration of UE 104 and communication protocol used by modem 240.

[0054] In some aspects, modem 240 may be a multi-band, multi-mode modem capable of processing digital data and communicating with transceiver 202, enabling the use of transceiver 202 to transmit and receive digital data. In some aspects, modem 240 may be multi-band and can be configured to support multiple frequency bands for a specific communication protocol. In some aspects, modem 240 may be multi-mode and configured to support multiple operating networks and communication protocols. In some aspects, modem 240 may control one or more components of UE 104 (such as RF front-end 288, transceiver 202) based on a specified modem configuration to enable the transmission or reception of signals from the network. In some aspects, the modem configuration may be based on the modem's mode and the frequency band in use. In another aspect, the modem configuration may be based on UE configuration information associated with UE 104 (such as information provided by the network during cell selection or cell reselection).

[0055] In some respects, processor 212 may correspond to a combination Figure 9 The UE describes one or more processors in the processor. Similarly, memory 216 may correspond to the combination of Figure 7 The memory described in the UE.

[0056] Figure 3 This is a block diagram illustrating an example of UE 104. UE 104 may include various components, some of which have been described above and are further described herein, including components such as one or more processors 312 and memory 316 communicating via one or more buses 344, and transceiver 302, which may operate in conjunction with modem 340 or communication component 342 for multiplexing UCI with multi-slot PUSCH transmissions based on scaling.

[0057] Transceiver 302, receiver 306, transmitter 308, one or more processors 312, memory 316, application 375, bus 344, RF front end 388, LNA 390, switch 392, filter 396, PA 398 and one or more antennas 365 may be the same as or similar to the corresponding components of base station 102 as described above, but are configured or otherwise programmed for base station operations opposite to base station operations.

[0058] In some respects, processor 312 may correspond to a combination Figure 7 The base station described in the text refers to one or more processors. Similarly, memory 316 may correspond to a combination of... Figure 7 The memory described by the base station in the text.

[0059] Figure 4This is an example representation of a Media Access Control (MAC) control element (CE) 400 used for activation / deactivation of a Semi-Persistent Probe Reference Signal (SRS) resource set. Figure 5 This is an example representation of MAC CE 500 for indicating spatial relationships in aperiodic SRS. For a semi-persistent / aperiodic SRS resource set, the spatial relationship information of each SRS resource within an SRS resource can be updated by the MAC CE. For a semi-persistent SRS resource set, the same MAC CE activates the entire SRS resource set. For an aperiodic SRS resource set, the MAC CE only updates the spatial relationship information.

[0060] In one example, for MAC CE 500, AP SRS resource set ID 502 corresponds to the SRS resource set ID corresponding to MAC CE 500. If field C 504 is set to 1, there are eight bytes including the resource serving cell ID field and the resource bandwidth portion (BWP) ID field. If field C 504 is set to 0, there are no resource serving cell ID field and resource BWP ID field. F0 506 describes the type and identifier of the resource used for spatial relation derivation for SRS resource i. For example, at 508, if Fi is 0, the SSB index or SRS resource index is used. If the first bit of resource Idi is 0, the remainder of the field includes the SRS resource Id. If the first bit of resource Idi is 1, the remainder of the field includes the SSB index. At 510, if Fi equals 1, resource Idi indicates the non-zero point (NZP) CSI-RS resource ID. At 512, the resource corresponds to M SRS resources within the SRS resource set.

[0061] Figure 6Example Synchronization Signal Block (SSB) locations are shown within a 5-millisecond (ms) half-frame 600. Specifically, an SSB consists of 4 OFDM symbols and includes a PSS, SSS, and PBCH / MIB. For example, an SSB set corresponds to a set of SSB indices associated with the same PCI (e.g., physCellId) in a given serving cell (CC), which is constrained to a 5-ms time interval (e.g., the first or second half of the frame). The period of the SS burst set can correspond to 5ms, 10ms, 20ms, ..., 160ms (e.g., default period = 20ms). The maximum number of SSBs within a 5ms SS burst set can correspond to 4 (sub-3GHz), 8 (sub-7GHz), or 64 (FR2). SSBs can be transmitted using different beams, and SSBs are indexed using SSB indices, which can correspond to 0, 1, ..., 63 (e.g., for 64 SSBs). Furthermore, the time-domain location (e.g., slot / OFDM symbol) of each SSB (within 5ms) comes from a fixed set of patterns (e.g., depending on the subcarrier spacing: 15 or 30 kHz for FR1; 120 or 240 kHz for FR2).

[0062] In one aspect, when accessing a cell from an idle cell (e.g., a Pcell), the UE determines information through a cell search procedure (i.e., based on detected SSBs (PSS / SSS / MIB) and SIBs). For example, the PCI is determined based on the PSS and SSS signals. Timing information, such as half-frame bits, SFN time, and the SSB index of the detected SSB, is determined based on the PBCH / MIB. Furthermore, other information (e.g., the SSB period, etc.) is determined based on the SIB. For an Scell, the UE can be configured with SSB information via dedicated RRC signaling using the parameter ServingCellConfigCommon. For each serving cell (e.g., a Pcell or an Scell), only one set of SSBs with associated PCIs exists.

[0063] Figure 7 Various example representations of the MAC CE 700 using the Resource Bandwidth Part (BWP) Identifier (ID) field and the reservation field are shown. For a UE configured with multiple SSB sets corresponding to multiple PCIs in a given serving cell, updating the MAC-CE for spatial relational information of SRS resources within the SRS resource set can indicate the SSB set and the SSB index of the RS within the SSB set as the spatial relational information for SRS resources. For example, the UE can use the corresponding resource ID... i(For example, associated with SRS resource i within the set) One or more of the existing (i.e., version 15 or 16 MAC-CE) "Resource BWP ID" field and the reserved "R" field are used to indicate an SSB set, while the corresponding Resource ID field indicates the SSB index within the indicated SSB set. The Resource BWP ID field is currently only used when the corresponding Resource ID references the SRS resource ID, and not in the case of an SSB index or NZP CSI-RS resource ID. The number of SSB sets that can be indicated is configurable or depends on how many bits are used to indicate the SSB set. For example, if "R" is used, one of two SSB sets (one additional / non-serving cell SSB set) can be indicated. If the "Resource BWP ID" field is used, the gNB can indicate one of four SSB sets (e.g., three additional SSB sets). If both are used, the gNB can indicate one of eight SSB sets (e.g., seven additional SSB sets). When C equals 1 (for example, there are the last M octets), the corresponding F i The value is equal to 0, and the resource ID is... i The first bit is 1 (e.g., in the resource ID field). i When the remaining portion contains the SSB index, the explanation above applies (the BWP ID field or reserved field indicates the SSB set). Otherwise, the "Resource BWP ID" field and the reserved "R" do not exist, or RS is not an SSB. In this example, C equal to 0 is impossible (i.e., if the last M octets are not needed, since the "Resource Serving Cell ID" is the same as the serving cell ID of the SRS resource set). Therefore, in this example, the overhead of MAC-CE may be greater, because the last M octets should exist so that the SSB set indication is possible.

[0064] Figure 8An example representation of a MAC CE 800 using one or more Synchronization Signal Block (SSB) set ID fields is shown. For example, one or more SSB set ID fields can be added to the MAC CE 800. An additional field corresponding to the SSB set ID exists only when the field in the MAC-CE is set to 1. If the field is set to 0, no additional field corresponding to the SSB set ID exists. In this case (the field is set to 0), if the SSB index is used for updating spatial relationship information of SRS resources, the SSB index corresponds to the first SSB set, not the SSB set in the additional or non-serving cell SSB set. For this one-bit field, one of the reserved "R" bits in the current MAC-CE can be used. The first SSB set ID field (e.g., SSB set ID0) corresponds to the first resource ID field including the SSB index (i.e., for which F...). i The first i equal to 0, and the resource ID i The first bit is 1), and the last SSB set ID field (e.g., SSB set ID) N This corresponds to the last resource ID field containing the SSB index. For example, N is the number of SSB set IDs, which is the number of SRS resources with updated spatial relation information using the SSB index as the RS. Further, N needs to be less than or equal to M, where M is the number of SRS resources within the set. The length of each SSB set ID field can be predetermined or configured by RRC. For example, if the length is 2 bits, there can be 4 SSB sets (e.g., 3 additional SSB sets). In one aspect, the length of MACCE is a function of at least one of the following: the length of each SSB set ID, the number of SRS resources with updated spatial relation information using the SSB index as the RS, the value of the 1-bit field, and the value of C.

[0065] Figure 9 This is a flowchart of an example method 900 for wireless communication at the UE's device. In one example, UE 104 can use... Figure 1 , Figure 3 and Figure 10 One or more of the components described in the document are used to perform the functions described in method 900.

[0066] At block 902, method 900 may receive a Media Access Control (MAC) control element (CE) from a network entity, the MAC CE indicating a set of Synchronization Signal Blocks (SSBs) and an SSB index within the SSB set serving as spatial relation information for probed reference signals (RS) resources, wherein the UE is configured with multiple SSB sets corresponding to multiple physical cell identifiers (PCIs) in the serving cell. In some aspects, communication component 342 (such as in combination with processor 312, memory 316, or transceiver 302) may be configured to receive a MAC CE from a network entity, the MAC CE indicating a set of SSBs and an SSB index within the SSB set serving as spatial relation information for SRS resources, wherein the UE is configured with multiple SSB sets corresponding to multiple PCIs in the serving cell. Therefore, one of the sub-components of UE 104, processor 312, communication component 342, or its sub-components may define a unit for receiving a MAC CE from a network entity, the MAC CE indicating an SSB set and an SSB index within the SSB set as spatial relation information for SRS resources, wherein the UE is configured with multiple SSB sets corresponding to multiple PCIs in the serving cell. For example, in one aspect, UE 104 and / or communication component 342 may receive signals, process the signals into a MAC CE, and / or perform other signaling procedures, such as those described above. Figure 3 As described.

[0067] At block 904, method 900 can update spatial relation information for one or more SRS resources within the SRS resource set based on MAC CE. In some aspects, communication component 342 (such as in conjunction with processor 312, memory 316, or transceiver 302) can be configured to update spatial relation information for one or more SRS resources within the SRS resource set based on MAC CE. Therefore, one of the subcomponents of UE 104, processor 312, communication component 342, or its subcomponents can define a unit for updating spatial relation information for one or more SRS resources within the SRS resource set based on MAC CE. For example, in one aspect, UE 104 and / or communication component 342 can configure processor 312 and / or transceiver 302 to update and / or perform other signaling procedures, such as those described above. Figure 3 As described.

[0068] In some implementations, the resource identifier (ID) associated with an SRS resource corresponds to one or more of the Resource Bandwidth Part (BWP) ID field and the reservation field that indicate one of a plurality of SSB sets.

[0069] In some implementations, the resource ID indicates the SSB index within one of multiple SSB sets.

[0070] In some implementations, the communication component 342 (such as in conjunction with processor 312, memory 316, or transceiver 302) may perform the following operations: determine whether a resource ID corresponds to an SRS resource ID; and utilize the resource BWP ID in the resource BWP ID field based on the determination that the resource ID corresponds to an SRS resource ID.

[0071] In some implementations, the communication component 342 (such as in conjunction with the processor 312, memory 316, or transceiver 302) may abandon the use of the resource BWP ID based on the determination that the resource ID does not correspond to the SRS resource ID, wherein the resource ID corresponds to at least one of the SSB index or the non-zero power (NZP) channel state information reference signal (CSI-RS) resource ID.

[0072] In some implementations, the number of multiple SSB sets is based on the use of at least one of the reserved field or the resource BWP ID field.

[0073] In some implementations, MAC CE includes one or more SSB set identifier (ID) fields.

[0074] In some implementations, the communication component 342 (such as in conjunction with processor 312, memory 316, or transceiver 302) may perform the following operations: determine whether a specified field of the MAC CE is set to one; and based on the determination that the specified field of the MAC CE is set to one, configure one or more additional fields of the MAC CE to correspond to one or more SSB set ID fields.

[0075] In some implementations, the communication component 342 (such as in conjunction with processor 312, memory 316, or transceiver 302) can be configured so that the SSB index corresponds to the first SSB set among a plurality of SSB sets.

[0076] In some implementations, the first SSB set ID field in one or more SSB set ID fields corresponds to the first resource ID field that includes the SSB index.

[0077] In some implementations, the last SSB set ID field in one or more SSB set ID fields corresponds to the last resource ID field including the SSB index.

[0078] In some implementations, the length of each SSB set ID field in one or more SSB set ID fields is at least one of the following: pre-defined, or configured by Radio Resource Control (RRC).

[0079] In some implementations, the length of the MAC CE is based on at least one of the following: the length of each SSB set ID, the number of SRS resources with updated spatial relation information using SSB indexes as RS, the value of a one-bit field, and the value regarding the presence of the last multiple octets.

[0080] In some implementations, MAC CE corresponds to the activation / deactivation of a semi-persistent SRS resource set.

[0081] In some implementations, MAC CE corresponds to an indication of aperiodic SRS spatial relationships.

[0082] In some implementations, the UE capability signaling message indicates the number of multiple SSB sets and the number of Physical Cell Identifiers (PCIs).

[0083] In some implementations, UE capability signaling messages are specified for at least one of each component carrier (CC) / serving cell or for all CCs / serving cells.

[0084] In some implementations, the UE capability signaling message indicates the total number of SSBs in a set of multiple SSBs used as at least one of the following: RS for spatial relation information, quasi-co-location (QCL) information, or path loss RS.

[0085] In some implementations, UE capability signaling messages are specified for at least one of each component carrier (CC) / serving cell or for all CCs / serving cells.

[0086] Figure 10 This is a block diagram of a MIMO communication system 1000 including base station 102 and UE 104. The MIMO communication system 1000 can be configured to implement the spatial relationship information update of the Medium Access Control (MAC) control element (CE) for the probe reference signal (SRS) as described herein. The MIMO communication system 1000 can show a reference... Figure 1 The wireless communication access network 100 is described in various aspects. Base station 102 may be a reference. Figure 1 Examples of various aspects of the described base station 102 are provided. Base station 102 may be equipped with antennas 1034 and 1035, and UE 104 may be equipped with antennas 1052 and 1053. In the MIMO communication system 1000, base station 102 may be able to transmit data simultaneously on multiple communication links. Each communication link may be referred to as a "layer," and the "rank" of the communication link may indicate the number of layers used for communication. For example, in a 2x2 MIMO communication system in which base station 102 transmits two "layers," the rank of the communication link between base station 102 and UE 104 is two.

[0087] At base station 102, transmit (Tx) processor 1020 can receive data from a data source. Transmit processor 1020 can process the data. Transmit processor 1020 can also generate control symbols or reference symbols. Transmit MIMO processor 1030 can perform spatial processing (such as precoding) on ​​the data symbols, control symbols, or reference symbols (if applicable) and can provide output symbol streams to transmit modulators / demodulators 1032 and 1033. Each modulator / demodulator 1032 to 1033 can process the corresponding output symbol stream (such as for OFDM) to obtain an output sample stream. Each modulator / demodulator 1032 to 1033 can further process (such as converting to analog, amplifying, filtering, and up-converting) the output sample stream to obtain a DL signal. In one example, the DL signal from modulators / demodulators 1032 and 1033 can be transmitted via antennas 1034 and 1035, respectively.

[0088] UE 104 can be used as a reference. Figure 1 and Figure 2 Examples of various aspects of the described UE 104. At UE 104, UE antennas 1052 and 1053 can receive DL signals from base station 102 and can provide the received signals to demodulators / demodulators 1054 and 1055, respectively. Each demodulator / demodulator 1054 to 1055 can adjust (e.g., filter, amplify, down-convert, and digitize) the corresponding received signal to obtain an input sample. Each demodulator / demodulator 1054 to 1055 can further process the input sample (e.g., for OFDM) to obtain received symbols. A MIMO detector 1056 can obtain received symbols from demodulators 1054 and 1055, perform MIMO detection on the received symbols (if applicable), and provide the detected symbols. A receive (Rx) processor 1058 can process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 104 to a data output, and provide decoded control information to processor 1080 or memory 1082.

[0089] In some cases, processor 1080 can execute stored instructions to instantiate communication component 242 (see, for example...). Figure 1 and Figure 2 ).

[0090] On the uplink (UL), at UE 104, the transmitting processor 1064 can receive and process data from a data source. The transmitting processor 1064 can also generate reference symbols for a reference signal. Symbols from the transmitting processor 1064 can be pre-encoded (if applicable) by the transmitting MIMO processor 1066, further processed by modulators / demodulators 1054 and 1055 (e.g., for SC-FDMA), and transmitted to base station 102 according to communication parameters received from base station 102. At base station 102, the UL signal from UE 104 can be received by antennas 1034 and 1035, processed by modulators / demodulators 1032 and 1033, detected by MIMO detector 1036 (if applicable), and further processed by the receiving processor 1038. The receiving processor 1038 can provide decoded data to a data output and to processor 1040 or memory 1042.

[0091] Components of UE 104 may be implemented individually or jointly using one or more ASICs suitable for performing some or all of the applicable functions in hardware. Each of the mentioned modules may be a unit for performing one or more functions related to the operation of MIMO communication system 1000. Similarly, components of base station 102 may be implemented individually or jointly using one or more ASICs suitable for performing some or all of the applicable functions in hardware. Each of the mentioned components may be a unit for performing one or more functions related to the operation of MIMO communication system 1000.

[0092] Some further example terms

[0093] Implementation examples are described in the following numbered clauses:

[0094] 1. A method for wireless communication at a user equipment (UE), comprising:

[0095] The UE receives a Media Access Control (MAC) control element (CE) from a network entity, the MAC CE indicating a set of Synchronization Signal Blocks (SSBs) and an SSB index within the SSB set as a spatial relation information for configuring Sounding Reference Signal (SRS) resources, wherein the UE is configured with multiple SSB sets corresponding to multiple Physical Cell Identifiers (PCIs) in the serving cell; and

[0096] The spatial relationship information for one or more SRS resources within the SRS resource set is updated based on the MAC CE.

[0097] 2. The method according to any of the preceding clauses, wherein the resource identifier (ID) associated with the SRS resource corresponds to one or more of the Resource Bandwidth Part (BWP) ID field and the reservation field indicating one of the plurality of SSB sets.

[0098] 3. The method according to any of the preceding clauses, wherein the resource ID indicates an SSB index within one of the plurality of SSB sets.

[0099] 4. The method according to any of the preceding clauses, wherein the number of the plurality of SSB sets is based on the use of at least one of the reserved field or resource BWP ID field.

[0100] 5. The method according to any of the preceding clauses, wherein the MAC CE includes one or more SSB set identifier (ID) fields.

[0101] 6. The methods described under any of the preceding clauses also include:

[0102] Determine whether the specified field of the MAC CE is set to one; and

[0103] Based on the determination that the specified field of the MAC CE is set to one, one or more additional fields of the MAC CE are configured to correspond to the one or more SSB set ID fields.

[0104] 7. The methods described under any of the preceding clauses also include:

[0105] Determine whether the SSB index is used to update the spatial relationship information for the one or more SRS resources; and

[0106] Based on the determination that the specified field of the MAC CE is not set to one and the SSB index is used to update the spatial relationship information for the one or more SRS resources, the SSB index is configured to correspond to the first part of the SSB set among the plurality of SSB sets.

[0107] 8. The method according to any of the preceding clauses, wherein the first SSB set ID field in the one or more SSB set ID fields corresponds to the first resource ID field including the SSB index.

[0108] 9. The method according to any of the preceding clauses, wherein the last SSB set ID field in the one or more SSB set ID fields corresponds to the last resource ID field including the SSB index.

[0109] 10. The method according to any of the preceding clauses, wherein the length of each SSB set ID field in the one or more SSB set ID fields is at least one of the following: predetermined, or configured by Radio Resource Control (RRC).

[0110] 11. The method according to any of the preceding clauses, wherein the length of the MAC CE is based on at least one of the following: the length of each SSB set ID, the number of SRS resources having updated spatial relation information using SSB indexes as the RS, the value of a one-bit field, and the value regarding the presence of the last plurality of octets.

[0111] 12. The method according to any of the preceding clauses, wherein the MAC CE triggers the activation / deactivation of the semi-persistent SRS resource set.

[0112] 13. The method according to any of the preceding clauses, wherein the MAC CE triggers an aperiodic SRS spatial relationship indication.

[0113] 14. The method according to any of the preceding clauses, wherein the UE capability signaling message indicates the number of the plurality of SSB sets and the number of Physical Cell Identifiers (PCIs).

[0114] 15. The method according to any of the preceding clauses, wherein the UE capability signaling message is specified for at least one of each component carrier (CC) / serving cell or for all CCs / serving cells.

[0115] 16. The method according to any of the preceding clauses, wherein the UE capability signaling message indicates the total number of SSBs in the plurality of SSB sets used as at least one of the following: the RS used for the spatial relation information, quasi-co-location (QCL) information, or path loss RS.

[0116] 17. The method according to any of the preceding clauses, wherein the UE capability signaling message is specified for at least one of each component carrier (CC) / serving cell or for all CCs / serving cells.

[0117] 18. An apparatus for wireless communication at a user equipment (UE), comprising:

[0118] transceiver;

[0119] Memory, which is configured to store instructions; and

[0120] One or more processors communicatively coupled to the transceiver and the memory, wherein the one or more processors are configured to execute the instructions to perform the following operations:

[0121] The UE receives a Media Access Control (MAC) control element (CE) from a network entity, the MAC CE indicating a set of Synchronization Signal Blocks (SSBs) and an SSB index within the SSB set as a spatial relation information for configuring Sounding Reference Signal (SRS) resources, wherein the UE is configured with multiple SSB sets corresponding to multiple Physical Cell Identifiers (PCIs) in the serving cell; and

[0122] The spatial relationship information for one or more SRS resources within the SRS resource set is updated based on the MAC CE.

[0123] 19. The apparatus according to any of the preceding clauses, wherein the resource identifier (ID) associated with the SRS resource corresponds to one or more of the Resource Bandwidth Part (BWP) ID field and the reservation field indicating one of the plurality of SSB sets.

[0124] 20. The apparatus according to any of the preceding clauses, wherein the resource ID indicates an SSB index within one of the plurality of SSB sets.

[0125] 21. The apparatus according to any of the preceding clauses, wherein the number of the plurality of SSB sets is based on the use of at least one of the reserved field or resource BWP ID field.

[0126] 22. The apparatus according to any of the preceding clauses, wherein the MAC CE includes one or more SSB set identifier (ID) fields.

[0127] 23. The apparatus according to any of the preceding clauses further includes:

[0128] Determine whether the specified field of the MAC CE is set to one; and

[0129] Based on the determination that the specified field of the MAC CE is set to one, one or more additional fields of the MAC CE are configured to correspond to the one or more SSB set ID fields.

[0130] 24. The apparatus according to any of the preceding clauses further includes:

[0131] Determine whether the SSB index is used to update the spatial relationship information for the one or more SRS resources; and

[0132] Based on the determination that the specified field of the MAC CE is not set to one and the SSB index is used to update the spatial relationship information for the one or more SRS resources, the SSB index is configured to correspond to the first part of the SSB set among the plurality of SSB sets.

[0133] 25. The apparatus according to any of the preceding clauses, wherein the first SSB set ID field of the one or more SSB set ID fields corresponds to at least one of the following: a first resource ID field including the SSB index, or a last resource ID field including the SSB index.

[0134] 26. The apparatus according to any of the preceding clauses, wherein the length of each SSB set ID field in the one or more SSB set ID fields is at least one of the following: predetermined, or configured by Radio Resource Control (RRC).

[0135] 27. The apparatus according to any of the preceding clauses, wherein the length of the MAC CE is based on at least one of the following: the length of each SSB set ID, the number of SRS resources having updated spatial relation information using SSB indexes as the RS, the value of a one-bit field, and the value regarding the presence of the last plurality of octets.

[0136] 28. The apparatus according to any of the preceding clauses, wherein the MAC CE corresponds to at least one of the following: semi-persistent SRS resource set activation / deactivation, or aperiodic SRS spatial relationship indication.

[0137] 29. An apparatus for wireless communication at a user equipment (UE), comprising:

[0138] A unit for receiving a Media Access Control (MAC) control element (CE) from a network entity, the MAC CE indicating a set of Synchronization Signal Blocks (SSBs) and an SSB index within the SSB set as a spatial relation information for configuring Sounding Reference Signal (SRS) resources, wherein the UE is configured with multiple SSB sets corresponding to multiple Physical Cell Identifiers (PCIs) in the serving cell; and

[0139] A unit for updating spatial relationship information of one or more SRS resources within an SRS resource set based on the MAC CE.

[0140] 30. A non-transitory computer-readable medium at a user equipment (UE), comprising code executable by one or more processors to perform the following operations:

[0141] The UE receives a Media Access Control (MAC) control element (CE) from a network entity, the MAC CE indicating a set of Synchronization Signal Blocks (SSBs) and an SSB index within the SSB set as a spatial relation information for configuring Sounding Reference Signal (SRS) resources, wherein the UE is configured with multiple SSB sets corresponding to multiple Physical Cell Identifiers (PCIs) in the serving cell; and

[0142] The spatial relationship information for one or more SRS resources within the SRS resource set is updated based on the MAC CE.

[0143] As used in this article, the phrase “at least one of” in a list of items refers to any combination of those items, including a single member. As an example, “at least one of the following: a, b, or c” is intended to cover: a, b, c, ab, ac, bc, and abc.

[0144] The various illustrative logic units, logic blocks, modules, circuits, and algorithmic processes described in conjunction with the implementations disclosed herein can be implemented as electronic hardware, computer software, or a combination of both. The interchangeability of hardware and software has been demonstrated in accordance with the overall functional description and the various illustrative components, blocks, modules, circuits, and processes described above. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the entire system.

[0145] Hardware and data processing means for implementing the various illustrative logic units, logic blocks, modules, and circuits described in conjunction with the aspects disclosed herein may be implemented or executed using a general-purpose single-chip or multi-chip processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. A general-purpose processor may be a microprocessor or any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration. In some implementations, specific processes and methods may be executed by circuitry specific to a given function.

[0146] In one or more aspects, the described functionality can be implemented using hardware, digital electronic circuits, computer software, firmware (including the structures disclosed in this specification and their structural equivalents), or any combination thereof. Implementation of the subject matter described in this specification can also be implemented as one or more computer programs encoded on a computer storage medium for execution by a data processing apparatus or for controlling the operation of a data processing apparatus; that is, one or more modules of computer program instructions.

[0147] If implemented in software, the functionality can be stored on or transmitted via a computer-readable medium as one or more instructions or code. The processes of the methods or algorithms disclosed herein can be implemented in a processor-executable software module that can reside on a computer-readable medium. Computer-readable media include both computer storage media and communication media, wherein the communication medium includes any medium capable of being implemented to transfer a computer program from one place to another. Storage media can be any available medium accessible to a computer. By way of example, and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and is accessible to a computer. Furthermore, any connection can be suitably referred to as a computer-readable medium. As used herein, disks and optical discs include compact optical discs (CDs), laser discs, optical discs, digital versatile optical discs (DVDs), floppy disks, and Blu-ray discs, wherein disks typically magnetically copy data, while optical discs utilize lasers to optically copy data. Combinations of the above should also be included within the scope of computer-readable media. In addition, the operation of a method or algorithm may exist as one or any combination or set of code and instructions on a machine-readable medium and a computer-readable medium, which may be incorporated into a computer program product.

[0148] Various modifications to the implementations described in this disclosure will be apparent to those skilled in the art, and the general principles defined herein can be applied to other implementations without departing from the spirit or scope of this disclosure. Therefore, the claims are not intended to be limited to the implementations shown herein, but are intended to be given the broadest scope consistent with this disclosure, the principles disclosed herein, and the novel features.

[0149] In addition, as will be readily apparent to those skilled in the art, the terms “upper” and “lower” are sometimes used for the convenience of describing the figures and indicate relative positions corresponding to the orientation of the figures on a properly oriented page, and may not reflect the correct orientation of the device as implemented.

[0150] Some features described in this specification in the context of separate implementations can also be implemented in combination in a single implementation. Conversely, individual features described in the context of a single implementation can also be implemented individually or in any suitable sub-combination in multiple implementations. Furthermore, although features may be described above as taking action in certain combinations, and even originally claimed in this manner, in some cases, one or more features from the claimed combination may be removed from that combination, and the claimed combination may involve sub-combinations or variations thereof.

[0151] Similarly, although operations are depicted in a specific order in the figures, this should not be construed as requiring them to be performed in the specific order shown or in sequential order, or to perform all of the shown operations to achieve the desired result. Furthermore, the figures may schematically depict one or more example processes in the form of flowcharts. However, other operations not depicted may be incorporated into the schematically shown example processes. For example, one or more additional operations may be performed before, after, simultaneously with, or between any of the shown operations. In some cases, multitasking and parallel processing may be advantageous. Moreover, the separation of the various system components in the implementation described above should not be construed as requiring such separation throughout the entire implementation, and it should be understood that the described program components and system can generally be integrated together in a single software product or packaged into multiple software products. Additionally, other implementations are within the scope of the following claims. In some cases, the actions recited in the claims may be performed in a different order and still achieve the desired result.

Claims

1. A method for wireless communication performed by a user equipment (UE), comprising: The UE receives a Media Access Control (MAC) control element (CE) from a network entity. The MAC CE indicates a set of Synchronization Signal Blocks (SSBs) and an SSB index within the SSB set that serves as spatial relation information for configuring Sounding Reference Signals (SRS) resources. The UE is configured with multiple SSB sets corresponding to multiple Physical Cell Identifiers (PCIs) in the serving cell. The resource identifier (ID) associated with the SRS resource corresponds to one or more of a Resource Bandwidth Part (BWP) identifier (ID) field and a reservation field indicating one of the multiple SSB sets. The spatial relationship information for one or more SRS resources within the SRS resource set is updated based on the MAC CE.

2. The method according to claim 1, wherein, The resource identifier indicates the SSB index within one of the plurality of SSB sets.

3. The method according to claim 2, wherein, The number of the multiple SSB sets is based on the use of at least one of the reserved fields or resource BWP identifier fields.

4. The method according to claim 1, wherein, The MAC CE includes one or more SSB set identifier (ID) fields.

5. The method according to claim 4, further comprising: Determine whether the specified field of the MAC CE is set to one; as well as Based on the determination that the specified field of the MAC CE is set to one, one or more additional fields of the MAC CE are configured to correspond to the one or more SSB set identifier fields.

6. The method according to claim 5, further comprising: Determine whether the SSB index is used to update the spatial relationship information for the one or more SRS resources; as well as Based on the determination that the specified field of the MAC CE is not set to one and the SSB index is used to update the spatial relationship information for the one or more SRS resources, the SSB index is configured to correspond to the first part of the SSB set among the plurality of SSB sets.

7. The method according to claim 4, wherein, The first SSB set identifier field in the one or more SSB set identifier fields corresponds to the first resource identifier field that includes the SSB index.

8. The method according to claim 4, wherein, The last SSB set identifier field in the one or more SSB set identifier fields corresponds to the last resource identifier field that includes the SSB index.

9. The method according to claim 4, wherein, The length of each SSB set identifier field in the one or more SSB set identifier fields is at least one of the following: predetermined, or configured by Radio Resource Control (RRC).

10. The method according to claim 4, wherein, The length of the MAC CE is based on at least one of the following: the length of each SSB set identifier, the number of SRS resources with updated spatial relation information using SSB indexes as the RS, the value of a one-bit field, and the value regarding the presence of the last plurality of octets.

11. The method according to claim 1, wherein, The MAC CE triggers the activation / deactivation of the semi-persistent SRS resource set.

12. The method according to claim 1, wherein, The MAC CE triggers a non-periodic SRS spatial relationship indication.

13. The method according to claim 1, wherein, The UE capability signaling message indicates the number of the multiple SSB sets and the number of Physical Cell Identifiers (PCIs).

14. The method according to claim 13, wherein, The UE capability signaling message is specified for at least one of each component carrier (CC) / serving cell or for all CCs / serving cells.

15. The method according to claim 1, wherein, The UE capability signaling message indicates the total number of SSBs in the plurality of SSB sets that are used as at least one of the following: the RS used for the spatial relationship information, quasi-co-location (QCL) information, or path loss RS.

16. The method according to claim 15, wherein, The UE capability signaling message is specified for at least one of each component carrier (CC) / serving cell or for all CCs / serving cells.

17. An apparatus for wireless communication, comprising: transceiver; Memory, configured to store instructions; as well as One or more processors configured to execute the instructions to cause the device to perform the following operations: The transceiver receives a Medium Access Control (MAC) control element (CE) from a network entity, the MAC CE indicating a set of Synchronization Signal Blocks (SSBs) and an SSB index within the SSB set that serves as spatial relation information for configuring Sounding Reference Signals (SRS) resources. The device is configured with multiple SSB sets corresponding to multiple Physical Cell Identifiers (PCIs) in the serving cell, wherein a resource identifier (ID) associated with the SRS resource corresponds to one or more of a Resource Bandwidth Part (BWP) Identifier (ID) field and a reservation field indicating one of the multiple SSB sets; and The spatial relationship information for one or more SRS resources within the SRS resource set is updated based on the MAC CE.

18. The apparatus according to claim 17, wherein, The resource identifier indicates the SSB index within one of the plurality of SSB sets.

19. The apparatus according to claim 18, wherein, The number of the multiple SSB sets is based on the use of at least one of the reserved fields or resource BWP identifier fields.

20. The apparatus according to claim 17, wherein, The MAC CE includes one or more SSB set identifier (ID) fields.

21. The apparatus according to claim 20, wherein, The one or more processors are further configured to cause the device to perform the following operations: Determine whether the specified field of the MAC CE is set to one; as well as Based on the determination that the specified field of the MAC CE is set to one, one or more additional fields of the MAC CE are configured to correspond to the one or more SSB set identifier fields.

22. The apparatus according to claim 21, wherein, The one or more processors are further configured to cause the device to perform the following operations: Determine whether the SSB index is used to update the spatial relationship information for the one or more SRS resources; as well as Based on the determination that the specified field of the MAC CE is not set to one and the SSB index is used to update the spatial relationship information for the one or more SRS resources, the SSB index is configured to correspond to the first part of the SSB set among the plurality of SSB sets.

23. The apparatus according to claim 20, wherein, The first SSB set identifier field in the one or more SSB set identifier fields corresponds to at least one of the following: a first resource identifier field that includes the SSB index, or a last resource identifier field that includes the SSB index.

24. The apparatus according to claim 20, wherein, The length of each SSB set identifier field in the one or more SSB set identifier fields is at least one of the following: predetermined, or configured by Radio Resource Control (RRC).

25. The apparatus according to claim 20, wherein, The length of the MAC CE is based on at least one of the following: the length of each SSB set identifier, the number of SRS resources with updated spatial relation information using SSB indexes as the RS, the value of a one-bit field, and the value regarding the presence of the last plurality of octets.

26. The apparatus according to claim 17, wherein, The MAC CE corresponds to at least one of the following: activation / deactivation of a semi-persistent SRS resource set, or indication of a non-periodic SRS spatial relationship.

27. An apparatus for wireless communication, comprising: A unit for receiving a Media Access Control (MAC) control element (CE) from a network entity, the MAC CE indicating a set of Synchronization Signal Blocks (SSBs) and an SSB index within the SSB set as a spatial relation information for configuring Sounding Reference Signal (SRS) resources, wherein the apparatus is configured with multiple SSB sets corresponding to multiple Physical Cell Identifiers (PCIs) in the serving cell, wherein a resource identifier (ID) associated with the SRS resource corresponds to one or more of a Resource Bandwidth Part (BWP) Identifier (ID) field and a reservation field indicating one of the multiple SSB sets; and A unit for updating the spatial relationship information of one or more SRS resources within an SRS resource set based on the MAC CE.

28. A non-transitory computer-readable medium comprising code executable by one or more processors to cause a user equipment (UE) to perform the following operations: The transceiver receives a Media Access Control (MAC) control element (CE) from a network entity. This MAC CE indicates a set of Synchronization Signal Blocks (SSBs) and the SSB indices of Reference Signals (RSs) within that set, which serve as spatial relational information for configuring Sounding Reference Signals (SRS) resources. The UE is configured with multiple SSB sets corresponding to multiple Physical Cell Identifiers (PCIs) in the serving cell, wherein the resource identifier (ID) associated with the SRS resource corresponds to one or more of the Resource Bandwidth Part (BWP) Identifier (ID) field and the reservation field indicating one of the multiple SSB sets; and The spatial relationship information for one or more SRS resources within the SRS resource set is updated based on the MAC CE.

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