Method and apparatus for reporting Channel Status Information (CSI)

Abstract

In one aspect of the invention, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE (User Equipment). The UE measures a first set of reference signals to determine a first channel state of a first channel between a first TRP (Transmission Control Point) and the UE. The UE measures interference received at the UE. The UE transmits a first CSI (Continuous Channel Indication) report corresponding to the first channel state. The UE transmits a second CSI report corresponding to the interference.

Description

[0001] Cross-reference to related applications

[0002] This application claims the benefit of U.S. Provisional Application No. 63 / 184,821, filed May 6, 2021, entitled “ACQUISITION FORCHANNEL STATE INFORMATION”, the entire contents of which are expressly incorporated herein by reference. Technical Field

[0003] This invention relates generally to communication systems, and more specifically to techniques for reporting channel state information (CSI) at user equipment. Background Technology

[0004] The statements in this section are provided only as background information in relation to the present invention and may not constitute prior art.

[0005] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone, video, data, messaging, and broadcasting. 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.

[0006] These multiple access technologies have been adopted in various telecommunications standards to provide a common protocol enabling different wireless devices to communicate at the municipal, national, regional, and even global levels. An example telecommunications standard is 5G New Radio (NR). 5G NR is part of the Continuous Evolution of Mobile Broadband program issued by the Third Generation Partnership Project (3GPP), designed to meet new requirements related to latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)), and other requirements. Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. 5G NR technology requires further improvements. These improvements may also apply to other multiple access technologies and telecommunications standards that adopt them. Summary of the Invention

[0007] The following is a simplified summary of one or more aspects to provide a basic understanding of these aspects. This summary is not a comprehensive overview of all anticipated aspects, nor is it intended to identify key or essential 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 description that follows.

[0008] In one aspect of the invention, a method, computer-readable medium, and apparatus are provided. The apparatus may be user equipment (UE). The UE measures a first set of reference signals to determine a first channel state of a first channel between a first transmission and reception point (TRP) and the UE. The UE measures interference received at the UE. The UE transmits a first CSI report corresponding to the first channel state. The UE transmits a second CSI report corresponding to the interference.

[0009] According to the method and apparatus for reporting channel state information provided by the present invention, CSI for the channel part and the interference part can be reported separately, so that the channel part changes smoothly and is more suitable for time domain compression. At the same time, the reporting periods corresponding to the CSI of the channel part and the CSI of the interference part do not need to be highly consistent, so as to reduce the reporting resource overhead.

[0010] To achieve the foregoing and related objectives, one or more aspects include the features fully described below and specifically pointed out in the claims. Certain aspects are illustrated in detail in the following description and accompanying drawings. Attached Figure Description

[0011] Figure 1 This is a diagram illustrating an example of a wireless communication system and access network.

[0012] Figure 2 This diagram illustrates communication between a base station and a UE in the access network.

[0013] Figure 3 The diagram illustrates an example logical architecture for a distributed access network.

[0014] Figure 4 The diagram illustrates an example physical architecture for a distributed access network.

[0015] Figure 5 This is a diagram representing an example of a time slot centered on DL.

[0016] Figure 6 This is a diagram illustrating an example of a time slot centered on UL.

[0017] Figure 7 This is a diagram illustrating the CSI report from the UE to the base station.

[0018] Figure 8 This is a diagram illustrating the techniques used in CSI reports.

[0019] Figure 9 This is another diagram illustrating the techniques used in CSI reporting.

[0020] Figure 10 This is a diagram illustrating the techniques used to report CSI from the UE to multiple TRPs.

[0021] Figure 11 is a flowchart of the CSI reporting method (process).

[0022] Figure 12 This is a diagram illustrating an example of a hardware implementation for a device employing a processing system. Detailed Implementation

[0023] The detailed description that follows, taken in conjunction with the accompanying drawings, is intended as a description of various configurations and not as representing the only configuration in which the concepts described in the invention can 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 can be practiced without these specific details. In some cases, well-known structures and components are shown in block diagram form to avoid obscuring these concepts.

[0024] Several aspects of a telecommunications system will now be presented with reference to various apparatuses and methods. These apparatuses and methods will be described in detail below and illustrated in the accompanying drawings by 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 system as a whole.

[0025] For example, an element, any part of an element, or any combination of elements may be implemented as a "processing system" including one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on a chip (SoCs), baseband processors, field-programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functions described throughout this invention. One or more processors in a processing system may execute software. Software should be interpreted broadly as instructions, instruction sets, code, code segments, program code, programs, subroutines, software components, application programs, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referring to software, firmware, middleware, microcode, hardware description languages, or others.

[0026] Therefore, in one or more example aspects, the described functionality can be implemented in hardware, software, or any combination thereof. If implemented in software, these functions can be stored or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media. Storage media can be any available medium that is accessible to a computer. By way of example and not limitation, such computer-readable media may include random-access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of computer-readable media of the types described above, or any other medium that can be used to store computer-executable code in the form of computer-accessible instructions or data structures.

[0027] Figure 1 This is a diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system (also known as a wireless wide area network (WWAN)) includes base station 102, UE 104, Evolved Packet Core (EPC) 160, and another core network 190 (e.g., a 5G Core (5GC)). Base station 102 may include macro cells (high-power cellular base stations) and / or small cells (low-power cellular base stations). Macro cells include base stations. Small cells include femtocells, picocells, and microcells.

[0028] Base station 102 configured for 4G LTE (collectively referred to as Evolved UMTS Terrestrial Radio Access Network, E-UTRAN) can interface with EPC 160 via backhaul link 132 (e.g., SI interface). Base station 102 configured for 5G NR (collectively referred to as Next Generation RAN, NG-RAN) can interface with core network 190 via backhaul link 184. Among other functions, base station 102 can perform one or more of the following functions: user data transmission, 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, non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, and multimedia broadcast / multicast services. Broadcast multicast service (MBMS), user and device tracking, RAN information management (RIM), paging, location, and warning message delivery. Base stations 102 can communicate with each other directly or indirectly (e.g., via EPC 160 or core network 190) via backhaul link 134 (e.g., X2 interface). Backhaul link 134 can be wired or wireless.

[0029] Base station 102 can wirelessly communicate with UE 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, 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 including small cells and macro cells can be referred to as a heterogeneous network. The heterogeneous network may also include Evolved Node B (eNB) (HeNB), which can provide services to a restricted group referred to as 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) transmission from UE 104 to base station 102 and / or downlink (DL) (also known as forward link) transmission from base station 102 to UE 104. Communication link 120 may use multiple-input multiple-output (MIMO) antenna techniques, including spatial multiplexing, beamforming, and / or transmit diversity. The communication link may use one or more carriers. Base station 102 / UE 104 may use spectrum (x component carriers) with a bandwidth of up to 7 MHz (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.) allocated per carrier in a total carrier aggregation of up to Yx MHz for transmission in each direction. Carriers may or may not be adjacent to each other. Carrier allocation may be asymmetrical for DL ​​and UL (e.g., more or fewer carriers may be allocated to DL than 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 carriers may be referred to as secondary cells (SCells).

[0030] Some UEs 104 can communicate with each other using device-to-device (D2D) communication links 158. D2D communication links 158 can use DL / UL WWAN spectrum. D2D communication links 158 can use one or more sidelink channels, such as the physical sidelink broadcast channel (PSBCH), physical sidelink discovery channel (PSDCH), physical sidelink shared channel (PSSCH), and physical sidelink control channel (PSCCH). D2D communication can be achieved through various wireless D2D communication systems, such as FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the 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 in the unlicensed 5 GHz spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) before communication to determine whether the channel is available.

[0032] Cell 102' can operate in licensed and / or unlicensed spectrum. When operating in unlicensed spectrum, cell 102' can employ NR and use the same 5 GHz unlicensed spectrum as Wi-Fi AP 150. Employing NR in unlicensed spectrum can extend the coverage and / or increase the capacity of the access network.

[0033] Base station 102, whether a small cell 102' or a large cell (e.g., a macro base station), can include an eNB, gNodeB (gNB), or other types of base stations. Some base stations, such as gNB 180, can operate in the conventional sub-6 GHz spectrum, millimeter wave (mmW) frequencies, and / or near-mmW frequencies for communication with UE 104. When gNB 180 operates in mmW or near-mmW frequencies, gNB 180 can be referred to as an mmW base station. Extremely high frequency (EHF) is a radio frequency portion of the electromagnetic spectrum. EHF ranges from 30 GHz to 300 GHz, with wavelengths between 1 mm and 10 mm. Radio waves in this band can be referred to as millimeter waves. Near-millimeter waves may extend down to frequencies of 3 GHz with wavelengths of 100 mm. The ultra-high frequency (SHF) band extends between 3 GHz and 30 GHz and is also known as centimeter waves. Communication using millimeter-wave / near-millimeter-wave radio frequency bands (e.g., 3 GHz–300 GHz) suffers from extremely high path loss and short range. The mmW base station 180 can compensate for the extremely high path loss and short range by utilizing beamforming 182 with the UE 104.

[0034] Base station 180 can transmit beamformed signals to UE 104 in one or more transmit directions 108a. UE 104 can receive beamformed signals from base station 180 in one or more receive directions 108b. UE 104 can also transmit beamformed signals to base station 180 in one or more transmit directions. Base station 180 can receive beamformed signals from UE 104 in one or more receive directions. Base station 180 / UE 104 can perform beamforming to determine the optimal receive and transmit directions for each base station 180 / UE 104. The transmit and receive directions of base station 180 can be the same or different. The transmit and receive directions of UE 104 can be the same or different.

[0035] 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 can communicate with the 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, and / or other IP services. BM-SC 170 can provide functionality for MBMS user service provisioning and delivery. BM-SC 170 can serve as an entry point for content provider MBMS transmissions, can be used to authorize and initiate MBMS bearer services within a public landmobile network (PLMN), and can be used to schedule MBMS transmissions. MBMS gateway 168 can be used to distribute MBMS services to base station 102 within a Multicast Broadcast Single Frequency Network (MBSFN) area belonging to a broadcast-specific service, and can be responsible for session management (start / stop) and collection of billing information related to eMBMS.

[0036] The core network 190 may include an Access and Mobility Management Function (AMF) 192, other AMFs 193, a Location Management Function (LMF) 198, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195. The AMF 192 may communicate with the Unified Data Management (UDM) 196. The AMF 192 is the control node that handles signaling between the UE 104 and the core network 190. Typically, the SMF 194 provides QoS streaming 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 connects to an IP service 197. The IP service 197 may include the Internet, intranet, IMS, PS streaming service, and / or other IP services.

[0037] 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 function, basic service set (BSS), extended service set (ESS), transmit reception point (TRP), or some other suitable terminology. Base station 102 provides UE 104 with access to EPC 160 or core network 190. Examples of UE 104 include cellular phones, smartphones, session initiation protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, GPS devices, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablets, smart devices, wearable devices, vehicles, meters, air pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or any other similarly functional devices. Some of the devices in UE 104 may be referred to as IoT devices (e.g., parking timers, gas pumps, toasters, vehicles, heart monitors, etc.). UE 104 may also be referred to as a station, mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, mobile phone, user agent, mobile client, client, or some other suitable terminology.

[0038] Although this invention may refer to 5G New Radio (NR), it is applicable to other similar fields, such as LTE, LTE-Advanced (LTE-A), CDMA, Global System for Mobile communications (GSM) or other wireless / radio access technologies.

[0039] Figure 2This is a block diagram illustrating communication between base station 210 and UE 250 in the access network. In the DL, IP packets from EPC 160 can be provided to controller / processor 275. Controller / processor 275 implements Layer 3 and Layer 2 functions. Layer 3 includes the radio resource control (RRC) layer, and Layer 2 includes the packet data convergence protocol (PDCP) layer, radio link control (RLC) layer, and medium access control (MAC) layer. The controller / processor 275 provides RRC layer functions associated with broadcast system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), mobility between radio access technologies (RATs), and measurement configuration of UE measurement reports; PDCP layer functions associated with header compression / decompression, security (encryption, decryption, integrity protection, integrity verification), and handover support functions; RLC layer functions associated with upper-layer packet data unit (PDU) transmission, error correction via 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 to transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction via HARQ, priority processing, and logical channel priority.

[0040] The transmit (TX) processor 216 and receive (RX) processor 270 implement Layer 1 functions associated with various signal processing functions. Layer 1 includes a physical (PHY) layer, which 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, physical channel modulation / demodulation, and MIMO antenna processing. The TX processor 216 processes 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), and M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols can then be split into parallel streams. Each stream can then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time and / or frequency domains, and then combined using an inverse fast fourier transform (IFFT) to generate a physical channel carrying a time-domain OFDM symbol stream. The OFDM streams are spatially precoded to generate multiple spatial streams. Channel estimates from channel estimator 274 can be used to determine coding and modulation schemes, as well as for spatial processing. The channel estimates can be derived from the reference signal and / or channel condition feedback transmitted by UE 250. Each spatial stream can then be provided to a different antenna 220 via a separate transmitter 218TX. Each transmitter 218TX can modulate an RF carrier with the corresponding spatial stream for transmission.

[0041] At UE 250, each receiver 254RX receives signals through its respective antenna 252. Each receiver 254RX recovers the information modulated onto the RF carrier and provides the information to the RX processor 256. The TX processor 268 and the RX processor 256 implement Layer 1 functions associated with various signal processing functions. The RX processor 256 can perform spatial processing on this information to recover any spatial stream destined for UE 250. If multiple spatial streams are destined for UE 250, they can be combined by the RX processor 256 into a single OFDM symbol stream. The RX processor 256 then uses a Fast Fourier Transform (FFT) to transform the OFDM symbol stream from the time domain to the frequency domain. The frequency domain signal consists of a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols and reference signals on each subcarrier are recovered and demodulated by determining the most probable signal constellation points transmitted by base station 210. These soft decisions can be based on channel estimates calculated by channel estimator 258. The soft decision is then decoded and deinterleaved to recover the data and control signals originally transmitted by base station 210 on the physical channel. The data and control signals are then provided to controller / processor 259, which implements layer 3 and layer 2 functions.

[0042] Controller / processor 259 may be associated with memory 260, which stores program code and data. Memory 260 may be referred to as a computer-readable medium. In UL, controller / processor 259 provides demultiplexing, packet reassembly, decryption, header decompression, and control signal processing between transport and logical channels to recover IP packets from EPC 160. Controller / processor 259 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operation.

[0043] Similar to the functions described in the DL transmission description of base station 210, controller / processor 259 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 upper-layer PDU transmission, error correction via 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 to TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction via HARQ, priority processing, and logical channel priority.

[0044] The TX processor 268 can use a reference signal transmitted from the base station 210 by the channel estimator 258 or a channel estimate derived from feedback to select an appropriate coding and modulation scheme and facilitate spatial processing. The spatial stream generated by the TX processor 268 can be provided to different antennas 252 via individual transmitters 254TX. Each transmitter 254TX can modulate an RF carrier with the corresponding spatial stream for transmission. UL transmission is processed at the base station 210 in a manner similar to that described in conjunction with the receiver function at the UE 250. Each receiver 218RX receives a signal through its respective antenna 220. Each receiver 218RX recovers the information modulated onto the RF carrier and provides the information to the RX processor 270.

[0045] Controller / processor 275 may be associated with memory 276, which stores program code and data. Memory 276 may be referred to as a computer-readable medium. In the UL, controller / processor 275 provides demultiplexing, packet reassembly, decryption, header decompression, and control signal processing between transport and logical channels to recover IP packets from UE 250. IP packets from controller / processor 275 may be provided to EPC 160. Controller / processor 275 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operation.

[0046] NR can refer to a radio configured to operate under a new air interface (e.g., different from an air interface based on Orthogonal Frequency Divisional Multiple Access (OFDMA)) or a fixed transport layer (e.g., different from Internet Protocol (IP)). NR can use OFDM with a cyclic prefix (CP) on both the uplink and downlink, and can include support for half-duplex operation using time division duplexing (TDD). NR may include mission-critical applications for enhanced mobile broadband (eMBB) services with wide bandwidths (e.g., exceeding 80 MHz), mmW for high carrier frequencies (e.g., 60 GHz), massive MTC (mMTC) for non-backward-compatible MTC technologies, and / or for ultra-reliable low-latency communication (URLLC) services.

[0047] It can support a single component carrier bandwidth of 100MHz. In one example, an NR resource block (RB) can span 12 subcarriers, each with a subcarrier bandwidth of 60kHz over a duration of 0.125ms or 15kHz over a duration of 0.5ms. Each radio frame can consist of 20 or 80 subframes (or NR slots) with a length of 10ms. Each subframe can indicate the link direction (i.e., DL or UL) for data transmission, and the link direction of each subframe can be dynamically switched. Each subframe can include DL / UL data as well as DL / UL control data. UL and DL subframes for NR can be defined as follows: Figures 5 to 6 To describe in more detail.

[0048] NR RAN can include a central unit (CU) and a distributed unit (DU). NR BS (e.g., gNB, 5G Node B, Node B, transmission reception point (TRP), access point (AP)) can correspond to one or more BSs. NR cells can be configured as access cells (ACells) or data-only cells (DCells). For example, the RAN (e.g., a central unit or a distributed unit) can configure cells. A DCell may be a cell used for carrier aggregation or dual connectivity and may not be used for initial access, cell selection / reselection, or handover. In some cases, a DCell may not transmit a synchronization signal (SS); in other cases, it may transmit an SS. NR BSs can transmit downlink signals indicating the cell type to the UE. Based on the cell type indication, the UE can communicate with the NR BS. For example, the UE can determine which NR BS to consider for cell selection, access, handover, and / or measurement based on the indicated cell type.

[0049] Figure 3An example logical architecture of a distributed RAN 300 according to aspects of the present invention is illustrated. A 5G access node 306 may include an access node controller (ANC) 302. The ANC may be the central unit (CU) of the distributed RAN. The backhaul interface to the next-generation core network (NG-CN) 304 may terminate at the ANC. The backhaul interface to the adjacent next-generation access node (NG-AN) 310 may terminate at the ANC. The ANC may include one or more TRPs 308 (also referred to as BS, NR BS, Node B, 5G NB, AP, or some other terminology). As mentioned above, TRP can be used interchangeably with "cell".

[0050] TRP 308 can be a distributed unit (DU). A TRP can be connected to one ANC (ANC302) or more ANCs (not shown). For example, for RAN sharing, radio as a service (RaaS), and service-specific ANC deployments, a TRP can be connected to multiple ANCs. A TRP can include one or more antenna ports. A TRP can be configured to provide services to the UE individually (e.g., dynamically selected) or jointly (e.g., jointly transmitted).

[0051] The local architecture of the distributed RAN 300 can be used to illustrate the fronthaul definition. An architecture supporting fronthaul solutions across different deployment types can be defined. For example, the architecture can be based on transport network capabilities (e.g., bandwidth, latency, and / or jitter). The architecture can share features and / or components with LTE. Depending on the aspect, the NG-AN 310 can support dual connectivity with NR. The NG-AN can share a common fronthaul for LTE and NR.

[0052] This architecture enables cooperation between TRPs 308. For example, cooperation can be pre-defined within and / or across TRPs via ANC 302. Depending on various aspects, inter-TRP interfaces may not be required or exist.

[0053] Depending on various factors, the dynamic configuration of separate logical functions can exist within the architecture of the distributed RAN 300. PDCP, RLC, and MAC protocols can be adaptively placed at the ANC or TRP.

[0054] Figure 4An example physical architecture of a distributed RAN 400 according to aspects of the present invention is illustrated. A centralized core network unit (C-CU) 402 may host core network functions. The C-CU may be centrally deployed. C-CU functions may be offloaded (e.g., to an advanced wireless service (AWS)) to handle peak capacity. A centralized RAN unit (C-RU) 404 may host one or more ANC functions. Optionally, the C-RU may host core network functions locally. The C-RU may have a distributed deployment. The C-RU may be located closer to the network edge. A distributed unit (DU) 406 may host one or more TRPs. The DU may be located at the network edge with radio frequency (RF) capabilities.

[0055] Figure 5 This is an example diagram 500 illustrating a DL-centered subframe. The DL-centered subframe may include a control portion 502. The control portion 502 may exist in the initial or beginning portion of the DL-centered subframe. The control portion 502 may include various scheduling and / or control information corresponding to the various portions of the DL-centered subframe. In some configurations, the control portion 502 may be a physical DL control channel (PDCCH), such as... Figure 5 As shown. A DL-centric subframe may also include a DL data portion 504. The DL data portion 504 may sometimes be referred to as the payload of the DL-centric subframe. The DL data portion 504 may include communication resources for transmitting DL data from a scheduling entity (e.g., a UE or BS) to a subordinate entity (e.g., a UE). In some configurations, the DL data portion 504 may be a physical DL shared channel (PDSCH).

[0056] The DL-centered subframe may also include a common UL section 506. The common UL section 506 may sometimes be referred to as a UL burst, a common UL burst, and / or various other suitable terms. The common UL section 506 may include feedback information corresponding to various other sections of the DL-centered subframe. For example, the common UL section 506 may include feedback information corresponding to the control section 502. Non-limiting examples of feedback information may include ACK signals, NACK signals, HARQ indicators, and / or various other suitable types of information. The common UL section 506 may include additional or alternative information, such as information related to the random access channel (RACH) procedure, scheduling request (SR), and various other suitable types of information.

[0057] like Figure 5 As shown, the end of the DL data portion 504 can be temporally separated from the start of the common UL portion 506. This temporal separation may sometimes be referred to as a gap, guard period, guard interval, and / or various other suitable terms. This separation provides time for the switch-over from DL communication (e.g., reception operation of a subordinate entity (e.g., UE)) to UL communication (e.g., transmission of a subordinate entity (e.g., UE)). Those skilled in the art will understand that the above is merely one example of a DL-centric subframe, and alternative structures with similar characteristics may exist without departing from the aspects described in this invention.

[0058] Figure 6 Figure 600 illustrates an example subframe centered on the UL. The UL-centered subframe may include a control section 602. The control section 602 may be present in the initial or beginning portion of the UL-centered subframe. Figure 6 The control section 602 in the above reference can be similar to the one mentioned above. Figure 5 The control portion 502 is described. The UL-centric subframe may also include a UL data portion 604. The UL data portion 604 may sometimes be referred to as the payload of the UL-centric subframe. The UL portion may refer to the communication resources used to transmit UL data from a subordinate entity (e.g., the UE) to a scheduling entity (e.g., the UE or the BS). In some configurations, the control portion 602 may be a physical DL control channel (PDCCH).

[0059] like Figure 6As shown, the end of control section 602 can be time-separated from the start of UL data section 604. This time separation may sometimes be referred to as a gap, protection cycle, protection interval, and / or various other suitable terms. This separation provides time for the switch from DL communication (e.g., receiving operations of a scheduling entity) to UL communication (e.g., transmissions of a scheduling entity). UL-centric subframes may also include a common UL section 606. Figure 6 The public UL section 506 can be similar to the reference above. Figure 5 The common UL portion 506 is described. The common UL portion 606 may additionally or alternatively include information relating to the channel quality indicator (CQI), sounding reference signal (SRS), and various other suitable types of information. Those skilled in the art will understand that the foregoing is merely one example of a UL-centric subframe, and alternative structures with similar characteristics may exist without departing from the aspects described in this invention.

[0060] In some cases, two or more subordinate entities (e.g., UEs) can communicate with each other using sidelink signaling. Practical applications of such sidelink communication may include public safety, proximity services, UE-to-network relay, vehicle-to-vehicle (V2V) communication, Internet of Everything (IoE) communication, Internet of Things (IoT) communication, mission-critical meshes, and / or various other suitable applications. Typically, sidelink signaling can refer to a signal transmitted from one subordinate entity (e.g., UE1) to another subordinate entity (e.g., UE2) without relaying the communication through a scheduling entity (e.g., UE or BS), even if the scheduling entity may be used for scheduling and / or control purposes. In some examples, licensed spectrum can be used to transmit sidelink signals (unlike wireless LANs that typically use unlicensed spectrum).

[0061] Figure 7Figure 700 illustrates the CSI report from the UE to the base station. Base station 702 and UE 704 communicate on channel 710. Base station 702 can transmit a space beam 740 on channel 710. The channel properties of channel 710 (i.e., the wireless communication link) are referred to as channel state information 714. This information describes how the signal propagates from the transmitter at base station 702 to the receiver at UE 704, and represents the combined effects of scattering, multipath fading, signal power attenuation with distance, etc. Understanding channel state information 714 at the transmitter and / or receiver allows data transmission to adapt to the current channel conditions, which is crucial for achieving reliable and robust communication at high data rates in multi-antenna systems. Channel state information 714 typically needs to be estimated at the receiver and is usually quantized and fed back to the transmitter.

[0062] The time and frequency resources used by UE 704 to report channel state information 714 are controlled by base station 702. Channel state information 714 may include CQI, PMI, CSI-RS resource indicator (CRI), SS block resource indicator, layer indicator (LI), rank indicator (RI), and / or L1-RSRP measurements. For CQI, PMI, CRI, LI, RI, and L1-RSRP, UE 704 can configure more than one CSI-reportConfig reporting setting, CSI-ResourceConfig resource setting, and one or two trigger state lists via RRC signaling, indicating the channel resource set ID and optionally available for interference measurements. Each trigger state contains an associated CSI-ReportConfig.

[0063] UE 704 uses CSI-RS transmitted from the transmit antenna port of base station 702 to measure the spatial channel between itself and the serving base station in order to generate a CSI report. UE 704 then calculates the CSI-related metrics and reports the CSI to base station 702. Using the CSI reports from all UEs, base station 702 performs link adaptation and scheduling. The goal of CSI measurement and reporting is to obtain an approximation of the CSI. This can be achieved when the reported PMI accurately represents one or more master channel eigenvectors, thus enabling accurate beamforming.

[0064] NR supports multiple types of spatial resolution CSI, including standard resolution (Type I) and high resolution (Type II). Low-resolution CSI is for SU-MIMO transmissions because it relies on the UE receiver to suppress inter-layer interference. This is possible because the number of receiver layers is less than the number of receiver antennas for a given UE. For MU-MIMO transmissions, the number of receiver layers is typically greater than the number of receiver antennas for the UE. The base station utilizes beamforming / precoding to suppress inter-UE interference. Therefore, higher-resolution CSI that captures more channel propagation paths is needed to provide sufficient degrees of freedom at the transmitter.

[0065] For high spatial resolution (Type II) CSI, two-layer feedback can be supported using a linear combination codebook. The codebook resolution is high enough to facilitate a sufficiently accurate approximation of the downlink channel. In this scheme, the UE reports a PMI representing a linear combination of multiple beams.

[0066] Both Type I and Type II CSI can use a dual-stage codebook W = W1W2, where W1 represents the broadband-based precoder component of the selected spatial vector basis, W2 represents the subband-based precoder component, representing the selection and / or in-phase under the further basis for Type ICSI, and the linear combination coefficients corresponding to the selected spatial basis for Type II CSI, respectively.

[0067] In some configurations, channel 710 between base station 702 and UE 704 has rank R. The frequency of channel 710 can be divided into multiple sub-bands or frequency elements. The frequency elements can range from 1 to F. total Indexing is performed. The precoder W with rank r and frequency unit index f can be written as...

[0068]

[0069] Where B = [b1 … b] l … b L ]., L is the number of fundamental beams 742 for each polarization; each b i This refers to the spatial beams selected for each polarization in a broadband manner, where 1 ≤ i ≤ L. A total of 2L spatial beams are selected for each polarization. r is the spatial layer index, 1 ≤ r ≤ R; f is the frequency index (e.g., subband index or PRB index), 1 ≤ f ≤ F. total , where F total This is the total number of frequency units (subbands, PRBs, etc.) for which CSI feedback is applicable, for example, 16 or 19.

[0070] To reduce the feedback overhead of the Type-II codebook, an "enhanced Type-II codebook" is introduced by compressing the CSI report in the frequency domain. The precoder for a spatial layer r with all frequency indices 1 ≤ f ≤ N3 in a segment can be written as:

[0071]

[0072] as well as

[0073]

[0074] Where N3 is the number of subbands (or frequency bins) used for CSI feedback, or the maximum number of delay taps in the time-domain formula, and O3 is the oversampling factor. M delay taps (or FD components) are used in the approximation; the role of O3 is best understood in the time-domain formula because it provides finer timing units for delay taps passing through O3, where 0 ≤ O3 ≤ O. 3-1 .

[0075] refer to Figure 7 UE 704 may also receive interference 790. Furthermore, in this example, base station 702 has J antennas transmitting signals, represented as follows:

[0076]

[0077] UE 704 has K antennas to receive signals transmitted from base station 702. The received signals are represented as follows:

[0078]

[0079] In addition, K antennas of UE 704 also received interference 790, as shown below:

[0080]

[0081] Channel 710 can be represented by a K×J matrix H (K×J) Therefore, the signals and interference received by UE 704 on channel 710 can be represented as follows:

[0082]

[0083] The state of channel 710 (by H) (K×J This indicates that it can be defined by a set of CSI parameters, the values ​​of which specify the channel state. For example, the above... These can be CSI parameters. Furthermore, the aforementioned CQI, PMI, CRI, LI, RI, L1-RSRP, etc., can be used to indicate the values ​​of CSI parameters. UE 704 can send one or more CSI reports to base station 702. Each CSI report can contain one or more of CQI, PMI, CRI, LI, RI, L1-RSRP, etc., thereby informing base station 702 of the channel state at UE 704.

[0084] Figure 8 Figure 800 illustrates the technology used for CSI reporting. In this example, UE 704 is configured to determine W using an enhanced Type-II codebook. (eType-II) It is associated with a two-dimensional space 810, which has a delay dimension on the X-axis and a spatial dimension on the Y-axis. The X-axis has delay indices τ0, τ1, τ2, τ3, ... representing different delay periods. The Y-axis has spatial indices α0, α1, α2, α3, ..., which represent different spatial locations. Figure 9 Figure 900 is another illustration of the techniques used in CSI reporting.

[0085] refer to Figure 8-9 In the first technique, UE 704 performs a set of CSI measurements at t1 (e.g., CSI-RS transmitted from base station 702). Based on these measurements, which are affected by interference 790, UE 704 determines that the signal (or pulse) received from the beam at position α3 with a delay period τ0 is optimal. In other words, the optimal signal is determined taking into account H and N as described above.

[0086] Therefore, UE 704 uses an enhanced Type-II codebook to determine W. (eType-II) (t1), which corresponds to α3 and τ0 in two-dimensional space 810. UE 704 sends CSI report A at t1', which includes an indication W (eType-II) The indicator (t1) is given by base station 702 (e.g., PMI). Base station 702 receives the indicator and can therefore derive W. (eType-II) (t1). Therefore, base station 702 can apply W (eType-II) (t1) is used as a pre-encoder to adjust the spatial beam 740, thereby transmitting the combined beam 744.

[0087] In the second technique, base station 702 can send a configuration to UE 704, instructing UE 704 to report CSI reports associated with channel 710 and CSI reports associated with interference 790, respectively. Similar to the first technique, UE 704 performs a set of CSI measurements at t1. Based on the measurements after removing the influence of interference 790, UE 704 determines that the signal (or pulse) received from the beam at position α1 with a delay period τ1 is optimal. That is, UE 704 determines the channel state of channel 710 as if UE 704 did not receive interference 790; UE 704 does not consider the influence of interference 790. The optimal signal is determined considering H and not N.

[0088] Therefore, UE 704 uses an enhanced Type-II codebook to determine W. (eType-II) (t1), which corresponds to α1 and τ1 in two-dimensional space 810. UE 704 sends a CSI report A at t1', including indication W (eType-II) The indicator (t1) is given by base station 702 (e.g., PMI). Base station 702 receives the indicator and can therefore derive W. (eType-II) (t1).

[0089] Furthermore, in the second technique, base station 702 also performs a measurement of interference 790 at t2. For example, UE 704 can measure the interference power in resource elements where base station 702 (and other known base stations) are not transmitting any signals. Subsequently, at t2', UE 704 can send a CSI report B to base station 702, including an indicator of the power of interference 790.

[0090] Furthermore, UE 704 can calculate the covariance of interference 790, defined as:

[0091]

[0092] Where E[·] is the expectation operator, n k The complex conjugate of . To save CSI reporting resources, UE 704 may not need to include R in CSI report B. K×K Indicators for all elements in the array. Conversely, UE 704 can apply singular value decomposition (SVD) techniques to R. K×K Then it can be represented as R K×K =UDV H Both U and V are K×K matrices, and their inverses are unitary matrices equal to the Hermitian conjugate. H It is the Hermitian conjugate of V. D is a K×K diagonal matrix whose elements d k(k = 1 to K) are positive or zero, as shown below:

[0093]

[0094] Therefore, UE 704 may include only the indicator of the non-zero element in D in CSI Report B. Thus, CSI Report B may (approximately) imply the corresponding element in d. k The eigenvectors of the P largest elements in the (k = 1 to K) region.

[0095] Furthermore, UE 704 can send CSI report A (i.e., the CSI report associated with H representing channel 710) in the first cycle and CSI report B (i.e., the CSI report associated with N representing interference 790) in the second cycle. In some cases, H may change smoothly, while N may change inconsistently. Therefore, the first cycle can be longer than the second cycle.

[0096] Figure 10 Figure 1000 illustrates the technique used for reporting CSI from a UE to multiple TRPs. The UE simultaneously communicates with multiple TRPs 1006-1, 1006-2, 1006-3, and 1006-4 operated by base station 1002. More specifically, UE 1004 receives transmissions from TRPs 1006-1, 1006-2, 1006-3, and 1006-4 via channels 1010-1, 1010-2, 1010-3, and 1010-4, respectively. Similar to the description of channel 710 above, channels 1010-1, 1010-2, 1010-3, and 1010-4 can be represented by H1, H2, H3, and H4, respectively. Furthermore, UE 704 receives interference 1090, which can be represented as N.

[0097] Using the second technique described above, UE 1004 performs measurements (e.g., CSI-RS) on channel 1010-1 (denoted by H1) to determine the values ​​of the CSI parameters, regardless of the effects from channels 1010-2, 1010-3, 1010-4 and interference 1090. Therefore, UE 704 generates a CSI report A associated only with H1. Similarly, UE 704 generates a corresponding CSI report A for each of channels 1010-2, 1010-3, and 1010-4. Furthermore, UE 704 also generates a CSI report B for interference 1090, similar to that described above regarding interference 790. Therefore, UE 704 can send individual CSI reports to base station 1002 via one or more of TRPs 1006-1, 1006-2, 1006-3, and 1006-4, each CSI report associated only with one of H1, H2, H3, H4, and N. Upon receiving them, base station 1002 can combine these CSI reports to derive a suitable code rate / modulation sequence for the PDSCH corresponding to the scheduled multi-TRP scheme. This scheme can be a single TRP transmission from one of TRPs 1006-1, 1006-2, 1006-3, and 1006-4, or a non-coherent joint transmission (NCJT) transmission from one or more of TRPs 1006-1, 1006-2, 1006-3, and 1006-4 with inter-TRP interference.

[0098] Figure 11 is a flowchart 1100 of a method (process) for reporting CSI. This method can be performed by a UE (e.g., UE 704, device 1202). In operation 1102, the UE measures a first set of reference signals to determine a first channel state of a first channel between the first TRP and the UE. In some configurations, the first channel state is associated with a set of CSI parameters. In operation 1104, the UE determines the values ​​of this set of CSI parameters based on the measurement of the first set of reference signals. In operation 1106, the UE includes an indication of the values ​​of this set of CSI parameters in a first CSI report generated corresponding to the first channel state.

[0099] In operation 1108, the UE measures a second set of reference signals to determine the second channel state of the second channel between the second TRP and the UE, regardless of transmissions on the first channel and interference received at the UE. In some configurations, the second channel state is associated with this set of CSI parameters. The UE determines the value of this set of CSI parameters based on the measurement of the second set of reference signals. The UE includes an indication of the value of this set of CSI parameters in the CSI report generated corresponding to the second channel state.

[0100] In operation 1110, the UE identifies resource elements for interference measurement. In operation 1112, the UE measures the signal power or covariance at the resource element to determine interference. Typically, the resource element has no transmission on the first or second channel. In operation 1114, the UE sends a first CSI report. In operation 1116, the UE sends a CSI report generated corresponding to the second channel state. In operation 1118, the UE sends a CSI report generated corresponding to the interference.

[0101] In some configurations, a first CSI report is sent with a first cycle and a CSI report corresponding to the interference is sent with a second cycle. In some configurations, the first cycle is longer than the second cycle. In some configurations, the CSI report corresponding to the interference includes an indication of the interference power or an indication of the interference covariance.

[0102] Figure 12 Figure 1200 illustrates an example of a hardware implementation of a device 1202 employing a processing system 1214. Device 1202 may be a UE (User Equipment). The processing system 1214 may be implemented using a bus architecture typically represented by a bus 1224. The bus 1224 may include any number of interconnect buses and bridges, depending on the specific application and overall design constraints of the processing system 1214. The bus 1224 links various circuits together, including one or more processors and / or hardware components, represented by one or more processors 1204, receiving components 1264, transmitting components 1270, channel measurement components 1276, interference measurement components 1278, CSI reporting components 1282, and computer-readable medium / memory 1206. The bus 1224 may also link various other circuits, such as timing sources, peripheral devices, voltage regulators, and power management circuits.

[0103] The processing system 1214 may be coupled to a transceiver 1210, which may be one or more transceivers 354. The transceiver 1210 may be coupled to one or more antennas 1220, which may be communication antennas 352.

[0104] Transceiver 1210 provides means for communicating with various other devices via a transmission medium. Transceiver 1210 receives signals from one or more antennas 1220, extracts information from the received signals, and provides the extracted information to processing system 1214, particularly receiving component 1264. Furthermore, transceiver 1210 receives information from processing system 1214, particularly transmission component 1270, and generates signals to be applied to one or more antennas 1220 based on the received information.

[0105] Processing system 1214 includes one or more processors 1204 coupled to computer-readable medium / memory 1206. The one or more processors 1204 are responsible for general processing, including executing software 1206 stored on the computer-readable medium / memory. When executed by the one or more processors 1204, the software causes processing system 1214 to perform the various functions described above for any particular device. Computer-readable medium / memory 1206 can also be used to store data manipulated by the one or more processors 1204 during software execution. Processing system 1214 also includes at least one of a receiving component 1264, a transmitting component 1270, a channel measurement component 1276, an interference measurement component 1278, and a CSI reporting component 1282. These components may be software components running in the one or more processors 1204, residing in / stored in the computer-readable medium / memory 1206, one or more hardware components coupled to the one or more processors 1204, or some combination thereof. The processing system 1214 may be a component of the UE 350 and may include at least one of memory 360 and / or TX processor 368, RX processor 356 and communication processor 359.

[0106] In one configuration, the device 1202 / device 1202' for wireless communication includes means for performing each operation of FIG11. These means may be one or more of the aforementioned components of the device 1202 and / or the processing system 1214 of the device 1202, configured to perform the functions listed above.

[0107] As described above, the processing system 1214 may include a TX processor 368, an RX processor 356, and a communication processor 359. Therefore, in one configuration, the above-described apparatus may be the TX processor 368, the RX processor 356, and the communication processor 359, configured to perform the functions described above.

[0108] It should be understood that the specific order or hierarchy of blocks in the disclosed process / flowchart is an illustration of exemplary methods. Based on design preferences, it is understood that the specific order or hierarchy of blocks in the process / flowchart can be rearranged. Furthermore, some blocks can be combined or omitted. The appended method claims present elements of various blocks in a sample order and are not intended to limit one to the specific order or hierarchy presented.

[0109] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined in the invention can be applied to other aspects. Therefore, the claims are not intended to limit the aspects shown in the invention, but are to be accorded the full scope consistent with the language of the claims, wherein elements referred to in the singular are not intended to mean “one and only one”, unless specifically stated otherwise, but rather “one or more”. The word “exemplary” is used herein to mean “as an example, instance, or illustration.” Any aspect described as “exemplary” in the invention is not necessarily to be construed as superior to or superior to other aspects. Unless expressly stated otherwise, the term “some” means 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", "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" can 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 members of A, B, or C. All structural and functional equivalents of the elements of the various aspects described herein that are known to or will be known hereafter by those skilled in the art are expressly incorporated herein by reference and are intended to be covered by the claims. Furthermore, nothing disclosed herein is intended to be offered to the public, whether or not such disclosure is expressly recited in the claims. Terms such as "module", "mechanism", "element", and "device" cannot replace the word "means". Therefore, no claim element should be construed as means plus function unless the element is expressly referenced using the phrase "means for".

Claims

1. A method for reporting channel state information, comprising: The first set of reference signals is measured to determine the first channel state of the first channel between the first transmit and receive point (TRP) and the user equipment, without considering the effects of measured interference; Measure the interference received by the user equipment; Send a first channel state information (CSI) report generated corresponding to the first channel state; as well as Send a second CSI report corresponding to the interference.

2. The method according to claim 1, characterized in that, The first CSI report is sent in a first cycle, and the second CSI report is sent in a second cycle.

3. The method according to claim 2, characterized in that, The first cycle is longer than the second cycle.

4. The method according to claim 1, characterized in that, The first channel state is associated with a set of CSI parameters, and the method further includes: The values ​​of the CSI parameters are determined based on the measurements of the first set of reference signals; and The values ​​of this set of CSI parameters are included in the first CSI report.

5. The method according to claim 1, characterized in that, The second CSI report includes an indication of the power of the interference or an indication of the covariance of the interference.

6. The method according to claim 1, further comprising: The second set of reference signals is measured to determine the second channel state of the second channel between the second TRP and the user equipment, without considering the transmission on the first channel and the interference received at the user equipment; as well as Send a third CSI report corresponding to the second channel state.

7. The method according to claim 6, characterized in that, The second channel state is associated with a set of CSI parameters. The method further includes: The values ​​of the CSI parameters are determined based on the measurements of the second set of reference signals; and The values ​​of this set of CSI parameters are included in the third CSI report.

8. The method according to claim 6, characterized in that, The measurement interference includes: Identify the resource elements used for interference measurements; and Measure the signal power or covariance at the resource element.

9. An apparatus for reporting channel state information, the apparatus being a user equipment, comprising: Memory; as well as At least one processor, coupled to the memory and configured to: The first set of reference signals is measured to determine the first channel state of the first channel between the first transmit and receive point (TRP) and the user equipment, without considering the effects of measured interference; Measure the interference received by the user equipment; Send a first channel state information (CSI) report generated corresponding to the first channel state; as well as Send a second CSI report corresponding to the interference.

10. The apparatus according to claim 9, characterized in that, The first CSI report is sent in a first cycle, and the second CSI report is sent in a second cycle.

11. The apparatus according to claim 10, characterized in that, The first cycle is longer than the second cycle.

12. The apparatus according to claim 9, characterized in that, The first channel state is associated with a set of CSI parameters, wherein the at least one processor is further configured to: The values ​​of the CSI parameters are determined based on the measurements of the first set of reference signals; and The values ​​of this set of CSI parameters are included in the first CSI report.

13. The apparatus according to claim 9, characterized in that, The second CSI report includes an indication of the power of the interference or an indication of the covariance of the interference.

14. The apparatus according to claim 9, characterized in that, The at least one processor is further configured to: The second set of reference signals is measured to determine the second channel state of the second channel between the second TRP and the user equipment, without considering the transmission on the first channel and the interference received at the user equipment; as well as Send a third CSI report corresponding to the second channel state.

15. The apparatus according to claim 14, characterized in that, The second channel state is associated with a set of CSI parameters, wherein the at least one processor is further configured to: The values ​​of the CSI parameters are determined based on the measurements of the second set of reference signals; and The values ​​of this set of CSI parameters are included in the third CSI report.

16. The apparatus according to claim 14, characterized in that, In order to measure the interference, the at least one processor is further configured to: Identify the resource elements used for interference measurements; and Measure the signal power or covariance at the resource element.

17. A non-volatile computer-readable medium storing computer-executable code for wireless communication of a user equipment, wherein when the code is executed by a processor of the user equipment, the user equipment causes the user equipment to perform the following operations: The first set of reference signals is measured to determine the first channel state of the first channel between the first transmit and receive point (TRP) and the user equipment, without considering the effects of measured interference; Measure the interference received by the user equipment; Send a first channel state information (CSI) report generated corresponding to the first channel state; as well as Send a second CSI report corresponding to the interference.

18. The computer-readable medium according to claim 17, characterized in that, The first CSI report is sent in a first cycle and the second CSI report is sent in a second cycle.

19. The computer-readable medium according to claim 18, characterized in that, The first cycle is longer than the second cycle.

20. The computer-readable medium according to claim 17, characterized in that, The first channel state is associated with a set of CSI parameters, wherein when the code is executed by the processor, the user equipment also performs the following operations: The values ​​of the CSI parameters are determined based on the measurements of the first set of reference signals; and The values ​​of this set of CSI parameters are included in the first CSI report.

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