Method and apparatus for wireless communication

Abstract

Provided are a method and device for wireless communication. The method comprises: a terminal device receiving first configuration information, the first configuration information being used to indicate a CSI-RS configuration; the terminal device determining a corresponding first CSI-RS resource according to the first configuration information; wherein the first CSI-RS resource is one of a plurality of CSI-RS resources indicated by the first configuration information, at least two CSI-RS resources in the plurality of CSI-RS resources have the same time domain position and / or frequency domain position, and the plurality of CSI-RS resources are used for a plurality of terminal devices or a plurality of terminal device groups to receive CSI-RS.

Description

Technical Field

[0001] This application relates to the field of communication technology, and more specifically, to a method and apparatus for wireless communication. Background Technology

[0002] Terminal devices can report CSI by measuring the Channel State Information (CSI) reference signal (CSI-RS) to enable network devices to perform precoding selection, layer configuration, and resource allocation. However, with the continuous increase in the number of antenna ports and bandwidth, and the gradual popularization of multi-beam / multi-point coordination, traditional CSI-RS configuration and CSI reporting mechanisms face significant challenges. For scenarios with massive MIMO and high bandwidth, how to reduce CSI-RS resource overhead and the computational or latency burden on terminal devices while ensuring CSI acquisition accuracy has become a technical problem that needs to be solved. Summary of the Invention

[0003] This application provides a method and apparatus for wireless communication. The various aspects of this application will be described below.

[0004] In a first aspect, a method for wireless communication is provided, comprising: a terminal device receiving first configuration information, the first configuration information being used to indicate CSI-RS configuration; the terminal device determining a corresponding first CSI-RS resource based on the first configuration information; wherein the first CSI-RS resource is one of a plurality of CSI-RS resources indicated by the first configuration information, at least two of the plurality of CSI-RS resources have the same time-domain location and / or frequency-domain location, and the plurality of CSI-RS resources are used by a plurality of terminal devices or a group of a plurality of terminal devices to receive CSI-RS.

[0005] In a second aspect, a method for wireless communication is provided, comprising: a network device sending first configuration information; wherein the first configuration information is used to indicate CSI-RS configuration, the first configuration information is used by a terminal device to determine a corresponding first CSI-RS resource, the first CSI-RS resource is one of a plurality of CSI-RS resources indicated by the first configuration information, at least two of the plurality of CSI-RS resources have the same time-domain location and / or frequency-domain location, and the plurality of CSI-RS resources are used by a plurality of terminal devices or a group of a plurality of terminal devices to receive CSI-RS.

[0006] Thirdly, an apparatus for wireless communication is provided, the apparatus being a terminal device, the apparatus comprising: a receiving unit for receiving first configuration information, the first configuration information being used to indicate CSI-RS configuration; and a processing unit for determining a corresponding first CSI-RS resource based on the first configuration information; wherein the first CSI-RS resource is one of a plurality of CSI-RS resources indicated by the first configuration information, at least two of the plurality of CSI-RS resources have the same time-domain location and / or frequency-domain location, and the plurality of CSI-RS resources are used by a plurality of terminal devices or a group of terminal devices to receive CSI-RS.

[0007] Fourthly, an apparatus for wireless communication is provided, the apparatus being a network device, the apparatus comprising: a transmitting unit for transmitting first configuration information; wherein the first configuration information is used to indicate CSI-RS configuration, the first configuration information is used by a terminal device to determine a corresponding first CSI-RS resource, the first CSI-RS resource being one of a plurality of CSI-RS resources indicated by the first configuration information, at least two of the plurality of CSI-RS resources having the same time-domain location and / or frequency-domain location, and the plurality of CSI-RS resources being used by a plurality of terminal devices or a group of a plurality of terminal devices to receive CSI-RS.

[0008] Fifthly, a communication device is provided, comprising a memory and a processor, the memory for storing a program, and the processor for calling the program in the memory to perform the method as described in the first or second aspect.

[0009] A sixth aspect provides an apparatus including a processor for calling a program from memory to perform the method as described in the first or second aspect.

[0010] A seventh aspect provides a chip including a processor for calling a program from memory, causing a device on which the chip is mounted to perform the method as described in the first or second aspect.

[0011] Eighthly, a computer-readable storage medium is provided having a program stored thereon that causes a computer to perform the method as described in the first or second aspect.

[0012] Ninth aspect, a computer program product is provided, including a program that causes a computer to perform the method as described in the first or second aspect.

[0013] In a tenth aspect, a computer program is provided that causes a computer to perform the method as described in the first or second aspect.

[0014] In this embodiment, the first CSI-RS resource indicated by the first configuration information received by the terminal device is one of a plurality of CSI-RS resources configured by the network device. At least two of the plurality of CSI-RS resources have the same time-domain and / or frequency-domain location. Therefore, the at least two CSI-RS resources have undergone aggregation processing, which helps to reduce the overhead of CSI-RS resources.

[0015] In this embodiment, the multiple CSI-RS resources configured in the network device can be used for multiple different terminal devices or groups of terminal devices to receive CSI-RS, thereby enabling the network to guarantee the availability of different types of terminal devices. Attached Figure Description

[0016] Figure 1 This is a system architecture example diagram of a wireless communication system to which embodiments of this application can be applied.

[0017] Figure 2 This is a schematic diagram of a network architecture applicable to embodiments of this application.

[0018] Figure 3A and Figure 3B This is a schematic diagram of a wireless protocol stack structure applicable to embodiments of this application.

[0019] Figure 4 This is a flowchart illustrating a method for wireless communication proposed in an embodiment of this application.

[0020] Figure 5 This is a schematic diagram illustrating various possible implementations of resource aggregation.

[0021] Figure 6 This is a schematic diagram of one possible implementation of reference signal resources with different periods.

[0022] Figure 7 This is a schematic diagram of a device for wireless communication provided in an embodiment of this application.

[0023] Figure 8 This is a schematic diagram of another device for wireless communication provided in an embodiment of this application.

[0024] Figure 9 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0026] Figure 1This is a system architecture example diagram of a wireless communication system 100 applicable to embodiments of this application. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide communication coverage for a specific geographical area and may communicate with the terminal device 120 located within that coverage area.

[0027] Figure 1 An exemplary network device and multiple terminal devices are illustrated, such as terminal devices 120a to 120j in the figure. Optionally, the wireless communication system 100 may include multiple network devices, and each network device may include other numbers of terminal devices within its coverage area; this application embodiment does not limit this.

[0028] Optionally, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment.

[0029] It should be understood that the technical solutions of the embodiments of this application can be applied to various communication systems, such as: 5th-generation (5G) systems or new radio (NR) systems, long-term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, advanced long-term evolution (LTE-A) systems, enhanced 5G (5G advanced) systems, etc. The technical solutions provided in this application can also be applied to future communication systems, such as 6th-generation (6G) mobile communication systems, satellite communication systems, etc.

[0030] The communication system in this application embodiment can be applied to carrier aggregation (CA) scenarios, dual connectivity (DC) scenarios, and standalone (SA) network deployment scenarios.

[0031] The embodiments of this application can be applied to non-terrestrial network (NTN) systems. As an example, the NTN system can be an NR-based NTN system, a 6G-based NTN system, an Internet of Things (IoT)-based NTN system, or a narrowband Internet of Things (NB-IoT)-based NTN system.

[0032] The terminal device in this application embodiment can also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The terminal device in this application embodiment can be a device that provides voice and / or data connectivity to a user, and can be used to connect people, objects, and machines, such as a handheld device with wireless connectivity, vehicle-mounted device, etc. The terminal device in the embodiments of this application may be a mobile phone, tablet computer, laptop computer, handheld computer, camera equipment, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc. Optionally, the terminal device may be used to act as a base station. For example, the terminal device may act as a scheduling entity, providing sidelink signals between UEs in vehicle-to-everything (V2X) or device-to-device (D2D) connections. For example, cellular phones and cars communicate with each other using sidelink signals. Cellular phones and smart home devices can communicate without relaying communication signals through base stations.

[0033] The network device in this application embodiment can be a device for communicating with a terminal device. This network device can also be called an access network device or a radio access network device, such as a base station (BS). In this application embodiment, the network device can refer to a radio access network (RAN) node or a next-generation RAN (NG-RAN) node (or device) that connects the terminal device to the wireless network. A base station can broadly encompass, or be replaced by, various names including: NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), relay station, transmitting and receiving point (TRP), transmitting point (TP), master station (MeNB), secondary station (SeNB), multi-mode radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, micro base station, relay node, donor node, or a combination thereof. A base station can also refer to a communication module, modem, or chip installed within the aforementioned equipment or apparatus. Base stations can also be mobile switching centers, devices that perform base station functions in D2D, V2X, and machine-to-machine (M2M) communications, network-side devices in 6G networks, and devices that perform base station functions in future communication systems. Base stations can support networks using the same or different access technologies. The embodiments of this application do not limit the specific technologies or device forms used in the network equipment.

[0034] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move depending on the location of the mobile base station. In other examples, a helicopter or drone can be configured as a device to communicate with another base station.

[0035] In some deployments, the network device in this application embodiment may refer to a CU or a DU, or the network device may include both a CU and a DU. The gNB may also include an AAU.

[0036] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located.

[0037] In this embodiment, the network device can provide services to a cell. The terminal device communicates with the network device through the transmission resources (e.g., frequency domain resources, or spectrum resources) used by the cell. The cell can be the cell corresponding to the network device (e.g., a base station). The cell can belong to a macro base station or to a base station corresponding to a small cell. The small cell can include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-speed data transmission services.

[0038] It should be understood that all or part of the functions of the communication device in this application can also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (e.g., a cloud platform).

[0039] Figure 2 A schematic diagram of a network architecture 200 according to an embodiment of this application is illustrated. This network architecture 200 describes the network architecture of a 5G NR / LTE / LTE-A system, which can also be referred to as a 5G system (5GS) / evolved packet system (EPS) network architecture. The network architecture 200 includes at least one of the following: network device 110, terminal device 120, 5G core network (5GC) / evolved packet core (EPC) 210, home subscriber server (HSS) / unified data management (UDM) 220, and Internet service 230. Figure 2 The network devices and terminal devices in the diagram are illustrated using RAN and UE as examples, respectively.

[0040] like Figure 2As shown, network device 110 provides user plane and control plane protocol termination to terminal device 120. Network device 110 is connected to 5GC / EPC 210 via an S1 / NG interface. 5GC / EPC 210 includes a mobility management entity (MME) / authentication management field (AMF) / session management function (SMF) 211, other MMEs / AMFs / SMFs 214, a service gateway (S-GW) / user plane function (UPF) 212, and a packet data network gateway (P-GW) / UPF 213. MME / AMF / SMF 211 is the control node that handles signaling between terminal device 120 and 5GC / EPC 210. Generally, MME / AMF / SMF 211 provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through the S-GW / UPF212, which is itself connected to the P-GW / UPF213. The P-GW provides UE IP address allocation and other functions. The P-GW / UPF213 is connected to Internet service 230. Internet service 230 includes operator-compliant Internet Protocol services, specifically including the Internet, intranet, IP multimedia subsystem (IMS), and packet-switched streaming services. It is evident that network architecture 200 provides packet-switched services; however, those skilled in the art will readily understand that the various concepts presented herein can be extended to networks providing circuit-switched services or other cellular networks.

[0041] Figure 3A and Figure 3B The following are schematic diagrams of the wireless protocol stack structure of one embodiment of this application. Figure 3A and Figure 3B This introduction uses the 5G wireless protocol stack as an example. The 5G wireless protocol stack is divided into two planes: the user plane (UP) protocol stack and the control plane (CP) protocol stack. The user plane protocol stack contains the protocol suite used for user data transmission, while the control plane protocol stack contains the protocol suite used for control signaling transmission in the 5G system. The specific names of each protocol stack layer are as follows:

[0042] like Figure 3AAs shown, the user plane protocol stack, from top to bottom, includes: the Service Data Adaptation Protocol (SDAP) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, the Medium Access Control (MAC) layer, and the Physical (PHY) layer.

[0043] like Figure 3B As shown, the control plane protocol stack, from top to bottom, includes: non-access stratum (NAS); radio resource control (RRC) layer, PDCP layer, RLC layer, MAC layer, and PHY layer.

[0044] It should be understood that the different layers in the above protocol stack have different functions, and they work together through inter-layer interaction to achieve communication between terminal devices and network devices. With the development of artificial intelligence technology, AI-assisted computing has permeated the processing implementation methods of the above protocol stack. For example, the scheduling algorithm of the MAC layer and the encoding / decoding algorithm of the PHY layer can apply artificial intelligence algorithms to improve the performance of communication algorithms.

[0045] As an example, Figure 3A and Figure 3B The wireless protocol architecture described herein is applicable to the terminal device described in this application.

[0046] As an example, Figure 3A and Figure 3B The wireless protocol architecture described herein is applicable to the network devices described in this application.

[0047] It should be understood that the interpretation of the terminology in the embodiments of this application may refer to the TS36, TS37 and TS38 series of specifications of the 3rd generation partnership project (3GPP), but may also refer to the specifications of the Institute of Electrical and Electronics Engineers (IEEE).

[0048] To facilitate understanding, some related technical knowledge involved in the embodiments of this application is first introduced. The following related technologies are optional solutions and can be arbitrarily combined with the technical solutions of the embodiments of this application, all of which fall within the protection scope of the embodiments of this application. The embodiments of this application include at least some of the following contents.

[0049] With the development of communication technologies, the requirements for system performance and capacity are becoming increasingly stringent. For example, as 5G NR has evolved from early versions to enhanced 5G, and then to subsequent 6G and above versions, cellular systems are constantly improving spectrum efficiency, edge coverage, and capacity. To improve spectrum efficiency, edge coverage, and capacity, communication systems are increasingly relying on massive multi-antenna (such as multiple-input multiple-output, MIMO), multi-TRP / multi-beam transmission, and fine beamforming at higher frequency bands.

[0050] In communication systems, CSI feedback is a crucial component. CSI feedback from terminal devices helps network equipment accurately understand the wireless channel state, thereby optimizing transmission parameters to improve system performance. The transmission of CSI-RS can be used by terminal devices to determine the CSI for feedback. For example, in NR systems, to support downlink adaptive scheduling and beamforming, the network side transmits CSI-RS. Terminal devices measure and report the CSI, enabling network equipment to perform precoding selection, layer configuration, and resource allocation.

[0051] Taking 5G NR as an example, 5G NR defines two types of codebooks: Type 1 and Type 2, and uses a set of precoding matrices to describe CSI. These precoding matrices are based on CSI-RS measurements. The Type 1 codebook is a regular-precision codebook that can support single-user MIMO transmission; the Type 2 codebook is a high-precision codebook that can support multi-user MIMO transmission to improve system spectral efficiency. Terminal devices transmit CSI to network devices through a feedback mechanism so that network devices can perform scheduling and precoding.

[0052] As an example, CSI parameters may include channel quality indicator (CQI), pre-coding matrix indicator (PMI), and rank indicator (RI), which will be explained in detail below.

[0053] CQI is a quantized value reported by the terminal device to the network device to indicate the channel quality of the downlink (DL). CQI reflects the maximum modulation and coding scheme that the terminal device can receive under the current channel conditions to ensure a certain bit error rate.

[0054] The Precoding Interface (PMI) is a feedback from the terminal device regarding the downlink channel state, instructing the network device which precoding matrix to select for signal transmission. The precoding matrix is ​​a linear transformation matrix used to process signals in a multi-antenna system. The network device determines the transmit precoding for the Physical Downlink Shared Channel (PDSCH), Physical Downlink Shared Channel (PDCCH), and CSI-RS, etc., based on the PMI reported by the terminal device.

[0055] RI represents the number of parallel data streams transmitted in a MIMO system. RI reflects the multipath propagation characteristics of the channel and the rank of the channel matrix, and is usually related to the spatial degrees of freedom of the channel.

[0056] Terminal devices can receive CSI-RS, determine CSI, and provide CSI feedback based on CSI-RS configuration and CSI reporting mechanisms. However, with the continuous increase in the number of antenna ports, bandwidth, and the growing popularity of multi-beam / multi-point collaboration, traditional CSI-RS configuration and CSI reporting mechanisms face significant challenges: on the one hand, to maintain sufficient accuracy, CSI-RS and CSI feedback often need to cover a wider frequency range and have higher spatial resolution; on the other hand, this directly leads to increased pilot resource consumption, increased computational complexity of terminal device measurement and reporting, increased power consumption, and implementation pressure under strict timing (measurement-processing-reporting) constraints.

[0057] To improve CSI accuracy, various solutions have been implemented, such as increasing pilot density, adding CSI-RS resources, or shortening the configuration cycle. However, these methods often lead to increased pilot resource element (RE) usage, more measurements by terminal devices, and significantly longer processing times in high-bandwidth and high-port scenarios. Furthermore, different terminal devices support varying CSI-RS density, port counts, and codebook / report types, resulting in configuration limitations and efficiency losses for cross-generational terminal devices.

[0058] Furthermore, the vision for 6G (such as International Mobile Telecommunications for 2030 and beyond, IMT-2030) emphasizes enhanced immersive experiences, improved ubiquitous coverage, and other capability expansions, and will support richer new scenarios and capabilities. These goals typically imply higher peak data rates and more stringent end-to-end experience metrics, stronger edge coverage, more frequent beam tracking and link adaptation, and potentially larger-scale arrays and higher-dimensional CSI acquisition requirements.

[0059] Therefore, for scenarios such as massive MIMO and high bandwidth, how to allocate CSI-RS resources more flexibly and how to reduce the feedback dimension have become technical issues that need to be considered. For example, how to significantly reduce CSI-RS resource overhead and the computational / latency burden of terminal devices while ensuring CSI acquisition / tracking accuracy, and how to maintain backward compatibility with the capabilities of existing terminal devices in network deployment, have become important technical challenges in the development of communication technology and the evolution of 6G.

[0060] To address the aforementioned issues, this application proposes a method for wireless communication. In this method, the first CSI-RS resource indicated by the first configuration information received by the terminal device is one of multiple CSI-RS resources configured by the network device. At least two of these multiple CSI-RS resources have the same time-domain and / or frequency-domain location. Therefore, the at least two CSI-RS resources are aggregated, which helps reduce the overhead of CSI-RS resources. Furthermore, these multiple CSI-RS resources can be used by multiple different terminal devices or groups of terminal devices to receive CSI-RS, enabling the network to guarantee the availability of different types of terminal devices.

[0061] To facilitate understanding, the following will be combined with... Figure 4 The present application provides an exemplary description of the method for wireless communication proposed in its embodiments. Figure 4 The method described is explained from the perspective of the interaction between the terminal device and the network device. The terminal device can be any of the communication terminals mentioned above, such as a UE. The network device can be any network-side device that communicates with the terminal device, such as a base station.

[0062] As one example, the terminal device may be Figure 1 Any of the terminal devices 120a to 120j shown.

[0063] As an example, the terminal device can be a relay, such as a relay terminal or a network control relay.

[0064] As one example, the terminal device can be any one of the multiple TRPs. The network device can be any one of the multiple TRPs that communicates with the terminal device.

[0065] The terminal device can be either a traditional terminal device or a new type of terminal device. A traditional terminal device can refer to one that only supports existing CSI-RS frequency density (or frequency domain density) or port configurations. Existing CSI-RS frequency density is, for example, 1 or 1 / 2. Existing port configuration is, for example, a configuration with 32 or fewer ports. A new type of terminal device can refer to one that supports a larger number of ports, a lower CSI-RS frequency density, and / or CSI-RS resource aggregation. Here, a larger number of ports and a lower CSI-RS frequency density can be relative to existing parameters. For example, a larger number of ports can refer to a number of ports greater than 32.

[0066] As an example, a traditional terminal device can be a first type of terminal device, and a novel terminal device can be a second type of terminal device.

[0067] As an example, a conventional terminal device can receive CSI-RS with 32 ports and 1 / 2 frequency density, while a new terminal device can receive CSI-RS with 128 ports and 1 / 8 frequency density.

[0068] In some embodiments, the terminal device may receive a downlink reference signal sent by the network device to perform channel estimation of the downlink channel. For example, the terminal device may receive a CSI-RS to determine the CSI of the downlink channel.

[0069] As an example, the terminal device can be any UE in RRC connected state.

[0070] In some embodiments, the terminal device and the network device can transmit and receive signals. For example, the terminal device receives signals, and the network device transmits signals. Alternatively, the terminal device transmits signals, and the network device receives signals.

[0071] As an example, data / signaling can be transmitted between the terminal device and the network device.

[0072] Network equipment can provide services to the serving cell where the terminal device is located. The cell where the terminal device is located can be an NTN cell or a terrestrial network cell, without limitation. As one embodiment, the terminal device is a UE in an NTN cell, and the network equipment is a satellite covering the NTN cell. As another embodiment, the terminal device and network equipment are a terminal and base station that interact in a 6G communication system or other future communication systems.

[0073] As an example, the serving cell where the terminal device is located can simultaneously contain both traditional terminal devices and new terminal devices.

[0074] Figure 4 The method shown includes steps S410 and S420, which are described below. It should be noted that the wireless communication method proposed in this application includes, but is not limited to, these steps.

[0075] See Figure 4 In step S410, the terminal device receives first configuration information. The first configuration information comes from the network device.

[0076] The first configuration information is used to indicate the CSI-RS configuration; therefore, the first configuration information can also be called CSI-RS configuration information. The CSI-RS configuration can also be called CSI configuration. The CSI-RS configuration includes at least one of the following: CSI-RS resources or a set of CSI-RS resources, CSI-RS configuration parameters, CSI report configuration information, and the aggregation mode of the CSI-RS resources.

[0077] The first configuration information can indicate multiple CSI-RS resources or one or more CSI-RS resource sets. The multiple CSI-RS indicated by the first configuration information can belong to one CSI-RS resource set or multiple CSI-RS resource sets, which is not limited here.

[0078] CSI-RS resources are time-frequency resources used for transmitting CSI-RS. In some embodiments, the first configuration information can directly indicate the time-frequency location of the CSI-RS resource. The time-domain location corresponding to the CSI-RS resource is the time unit in which the terminal device receives the CSI-RS, i.e., the CSI-RS timing or CSI-RS reception timing. The frequency-domain location corresponding to the CSI-RS resource is the frequency unit in which the terminal device receives the CSI-RS.

[0079] As an example, a CSI-RS resource can be one or more resource blocks (RBs) or one or more REs.

[0080] As an example, the time-domain location corresponding to a CSI-RS resource can be one or more time slots, or one or more symbols. The symbol can be, for example, an orthogonal frequency division multiplexing (OFDM) symbol.

[0081] As an example, the frequency domain location corresponding to the CSI-RS resource can be one or more subcarriers, or one or more carriers.

[0082] As an example, the multiple CSI-RS resources indicated by the first configuration information can be non-zero power (NZP) CSI-RS resources or zero power (ZP) CSI-RS resources, and there is no limitation here.

[0083] As one embodiment, the multiple CSI-RS resources indicated by the first configuration information are distributed across one or more time slots. For example, the multiple CSI-RS resources indicated by the first configuration information correspond to one time slot or two consecutive time slots.

[0084] The multiple CSI-RS resources indicated by the first configuration information can be used by multiple terminal devices or groups of terminal devices to receive CSI-RS. For example, the multiple CSI-RS resources indicated by the first configuration information are resources for different types of terminal devices. That is, the multiple CSI-RS resources correspond to multiple different types of terminal devices.

[0085] As an example, multiple CSI-RS resources correspond one-to-one with multiple types of terminal device groups.

[0086] In some embodiments, multiple terminal devices or groups of terminal devices have different capabilities. That is, multiple CSI-RS resources can be configured based on the capabilities of the terminal devices. Therefore, the first configuration information can pair multiple CSI-RS resources based on the different capabilities of the terminal devices. Multiple sets of CSI-RS transmitted through multiple CSI-RS resources can also be configured based on the capabilities of the terminal devices or groups of terminal devices. The capabilities of the terminal devices or groups of terminal devices include at least one of the following: whether the terminal device supports the aggregation of CSI-RS resources; the number of ports supported by the terminal device; the CSI-RS frequency density supported by the terminal device; whether the terminal device supports a specified type of codebook or CSI report; the maximum number of effective ports supported by the terminal device; the maximum number of subbands supported by the terminal device; the service type supported by the terminal device; the mobility of the terminal device; the coverage level corresponding to the terminal device; and the location of the terminal device. These will be explained in detail below in conjunction with step S420.

[0087] As an example, the capabilities of a terminal device can be used to indicate whether the terminal device is a traditional terminal device or a new type of terminal device.

[0088] As an example, multiple terminal devices can include both traditional and new terminal devices. To support backward compatibility, when both traditional and new terminal devices exist simultaneously in the same cell, the network side can configure and transmit two sets of CSI-RS. The first set of CSI-RS is used for CSI measurement / feedback of traditional terminal devices, and the second set of CSI-RS is used for CSI measurement / feedback of new terminal devices. The configuration parameters of the first and second sets of CSI-RS are different. For example, the network side can transmit a first set of CSI-RS with 32 ports and a frequency density of 1 / 2, and a second set of CSI-RS with 128 ports and a frequency density of 1 / 8.

[0089] In some embodiments, the configuration parameters of CSI-RS may include at least one of the following: CSI-RS frequency density, number of CSI-RS ports, and CSI-RS period. That is, when the network device indicates a CSI-RS resource or a CSI-RS resource set through first configuration information, the first configuration information may indicate at least one of the above-mentioned CSI-RS configuration parameters for the CSI-RS transmitted on the CSI-RS resource. The CSI-RS frequency density can be represented by ρ. The number of CSI-RS ports can be represented by P. CSI-RS express.

[0090] As one embodiment, the multiple CSI-RS resources indicated by the first configuration information may correspond to the same CSI-RS configuration parameters or different CSI-RS configuration parameters. For example, at least two CSI-RS resources among the multiple CSI-RS resources may have the same CSI-RS configuration parameters, or at least two CSI-RS resources among the multiple CSI-RS resources may have different CSI-RS configuration parameters. When the CSI-RS configuration parameters of the at least two CSI-RS resources indicated by the first configuration information are different, the first configuration information may indicate at least two sets of CSI-RS based on the different configuration parameters.

[0091] For example, at least two of the multiple CSI-RS resources indicated by the first configuration information have different CSI-RS frequency densities, or at least two CSI-RS resources have the same CSI-RS frequency density.

[0092] For example, at least two of the multiple CSI-RS resources indicated by the first configuration information have different numbers of CSI-RS ports, or at least two CSI-RS resources have the same number of CSI-RS ports.

[0093] For example, at least two of the multiple CSI-RS resources indicated by the first configuration information have different CSI-RS periods, or at least two CSI-RS resources have the same CSI-RS period.

[0094] For example, the network device may have two sets of CSI-RS resources configured for traditional terminal devices and new terminal devices, respectively, with different CSI-RS configuration parameters, and these two sets of CSI-RS resources can be aggregated.

[0095] As one embodiment, the CSI-RS frequency density is any value less than 1 / 2. As another implementation, the CSI-RS frequency density may include at least one of the following: 1 / 3, 1 / 4, 1 / 6, or 1 / 8.

[0096] For different CSI-RS frequency densities, the product of the subband size and the CSI-RS frequency density corresponding to the CSI-RS configuration may not be an integer. When the product of the subband size and the CSI-RS frequency density is not an integer, the subband corresponding to the CSI-RS configuration satisfies at least one of the following: when the CSI-RS frequency density includes 1 / 3 or 1 / 6, the subband size includes a multiple of 3 or 6; the subband corresponding to the CSI-RS configuration is divided into n partial subbands, where n is a positive integer. A partial subband refers to 1 / n of a subband, also called a 1 / n subband, such as a half-subband. That is, when the product of the subband size and the CSI-RS frequency density is not an integer, a new subband size is introduced, or the subband is divided from coarse-grained to fine-grained. In this way, even with new frequency density values, the traditional constraints / configurations of the CSI reporting bands can be maintained, thereby ensuring that all CSI subbands have at least the configured NZP CSI-RS resource density.

[0097] As an example, when the CSI-RS frequency density includes 1 / 3 or 1 / 6, the subband size corresponding to the CSI-RS configuration is a multiple of 3 or 6. This subband size refers to the number of RBs or physical resource blocks (PRBs). The size of the subband corresponding to the CSI-RS configuration can also be called the CSI subband size. For CSI-RS frequency densities including 1 / 3 or 1 / 6, inconsistent channel estimation between CSI subbands may occur, leading to significant differences in CQI quality across different CSI subbands. For example, for NZP CSI-RS resources with a frequency density of 1 / 3 and a CSI subband size of 4 RBs, the number of CSI-RS REs within different CSI subbands may differ because the subband size is not a multiple of 3 or 6. Therefore, when the CSI-RS frequency density includes 1 / 3 or 1 / 6, this problem needs to be addressed by introducing a new subband size. The new subband size can be a multiple of 3 or 6, as shown in Table 1.

[0098] Table 1

[0099] Bandwidth part / PRBs Subband size / PRBs 24-72 4，8，6 73-144 8，16，12 145-275 16，32，24，30

[0100] The subband sizes in bold in Table 1 illustrate the new subband sizes introduced for different bandwidth portions. When the CSI-RS frequency density is 1 / 3 or 1 / 6, configuring the corresponding CSI subband size as a multiple of 3 or 6 ensures that the number of CSIREs within the CSI subband is the same. Furthermore, when introducing a new CSI subband size, the reporting overhead of the subband CSI should be minimized.

[0101] As another example, the size of the subband corresponding to the CSI-RS configuration is usually not a multiple of 8. When the CSI-RS frequency density is 1 / 8 and the subband size is not a multiple of 8, if ρ = 1 / 8 is used directly, the number of CSI-RS REs in different CSI subbands may also be different. In this case, the subband can be divided into n partial subbands, and the offset is determined based on the granularity of the division.

[0102] For example, for multiple resources within the same CSI-RS resource group, a fine-grained half-subband (e.g., 4RB) offset is introduced on the basis of coarse-grained subband (e.g., 8RB) selection, so that different resources are distributed in different fine-grained subbands of the same coarse-grained subband, thereby improving the dispersion of resources in the frequency domain and reducing the correlation between resources.

[0103] For example, when the subband corresponding to the CSI-RS configuration is divided into n partial subbands, the offset unit of the CSI-RS resource is 1 / n subband.

[0104] As one example, the number of CSI-RS ports is any value greater than 32. As another implementation, the number of CSI-RS ports may include at least one of the following: 48, 64, 128, or 256.

[0105] When the number of CSI-RS ports exceeds the first parameter, the current communication scenario is a multi-port or high-port scenario. The first parameter is, for example, 16 or 32. When the number of CSI-RS ports exceeds the first parameter, the multiple ports (i.e., all ports) corresponding to the CSI-RS configuration are divided into multiple port subsets. Each port subset corresponds to one CSI-RS resource. For example, a single NZP CSI-RS resource often struggles to handle / map a very large number of ports at once, especially when symbol / RE / configuration complexity is limited. Therefore, the resource set corresponding to multiple ports can be split. This resource set can be split based on the divided port subsets.

[0106] As an example, when P CSI-RS When P is greater than the first parameter, CSI-RS Each port is divided into K port subsets, where K is an integer. For example, when there are 128 ports, these 128 ports are divided into 4 port subsets, i.e., 4 groups of 32 port resources, which can be represented as R1 to R4. Specifically, 128 ports = 4 × 32 ports, and the 4 port subsets correspond to 4 resources. Resource #1 corresponds to ports 0-31; resource #2 corresponds to ports 32-63; resource #3 corresponds to ports 64-95; and resource #4 corresponds to ports 96-127.

[0107] For example, a terminal device or network device can split 128 ports into K port subsets, corresponding to K NZP CSI-RS resources. Each resource covers a portion of the ports (e.g., each resource covers 32 ports). The terminal device can combine the measurement results of these K resources and use them as input to a single 128-port channel for CSI to determine RI / PMI / CQI.

[0108] The K NZP CSI-RS resources can be located in multiple consecutive time slots. That is, these K resources are not necessarily all crammed into the same time slot, but can be distributed across two adjacent time slots (e.g., time slot i and time slot i+1). For example, time slot i corresponds to resources #1 and #2, and time slot i+1 corresponds to resources #3 and #4.

[0109] Optionally, the terminal device or network device can further extend the span of the K resources to accommodate a higher number of ports. Specifically, if the number of ports is higher (e.g., 256 or more), K will be larger. If two time slots are not enough or the overhead is too concentrated, the K resources can be sent across more consecutive time slots (e.g., 3, 4 or more time slots), with each time slot containing a portion of the resources.

[0110] As an example, multiple CSI-RS resources corresponding to multiple port subsets belong to the multiple CSI-RS resources indicated by the first configuration information.

[0111] As an example, the period of CSI-RS may include at least one of the following: 5ms, 10ms, 15ms.

[0112] As an example, for a cell with both traditional and new terminal devices, the network (NW) side can configure two sets of CSI-RS resources based on different CSI-RS configuration parameters to transmit two sets of CSI-RS. The two sets of CSI-RS can be designed for traditional and new terminal devices respectively to support backward compatibility. For example, the NW can transmit a first set of CSI-RS with 32 ports and a 1 / 2 frequency density, and a second set of CSI-RS with 128 ports and a 1 / 8 frequency density. Traditional terminal devices receive the first set of CSI-RS, and new terminal devices receive the second set. When the resources of the first and second sets of CSI-RS are aggregated, the traditional terminal devices need to perform rate matching on the REs occupied by the second set of CSI-RS based on the ZP CSI-RS resources. In this case, the REs occupied by the second set of CSI-RS should match the REs occupied by the ZP CSI-RS resources with a frequency density of 1 or 1 / 2.

[0113] In some embodiments, the first configuration information may indicate relevant configuration information for CSI reporting. That is, the first configuration information is also used to instruct the terminal device to report CSI reports. For example, the first configuration information may instruct the terminal device to report broadband CSI reports based on a Rel-19 type 1 codebook. As another example, the first configuration information may indicate the period at which the terminal device reports CSI reports.

[0114] As an example, the first configuration information may indicate the CSI-RS resource set and / or CSI report configuration.

[0115] In some embodiments, the first configuration information may also indicate the aggregation mode of CSI-RS resources. The aggregation mode of CSI-RS resources may also be referred to as the allocation mode of CSI-RS resources. That is, the first configuration information is also used to indicate the aggregation of multiple CSI-RS resources. The aggregation mode of CSI-RS resources may include the method of resource aggregation, and may also include parameters for resource aggregation.

[0116] Resource aggregation methods can include frequency domain aggregation, time domain aggregation, and overlap. For example, to reduce the resource overhead of CSI-RS in the frequency domain, the network side can configure multiple NZP CSI-RS resources with lower frequency density and instruct the terminal device to aggregate these multiple low-frequency-density NZP CSI-RS resources to form an equivalent CSI measurement input. In other words, when the CSI-RS frequency density decreases, CSI-RS resources with lower frequency density can be aggregated to reduce resource overhead.

[0117] As an example, multiple CSI-RS resources being aggregated can occupy the same time-domain resources. That is, the multiple CSI-RS resources being aggregated correspond to the same time-domain location. The same time-domain location indicates that the resource aggregation method is frequency-domain aggregation. The time-domain resource can be one or more consecutive time slots. In other words, the same time-domain location can be one or more time slots. After "stitching together" multiple lower-frequency-density NZP CSI-RS resources at the same time-domain location, the total RE coverage ratio occupied by these multiple NZP CSI-RS resources in the frequency domain can achieve an equivalent high-frequency-density pattern. For example, achieving an equivalent frequency density of 1 means that the RE occupied by the aggregated NZP CSI-RS is aligned with the RE occupied by a ZP CSI-RS with a frequency density of 1.

[0118] As an example, multiple CSI-RS resources being aggregated can occupy the same frequency domain resource. That is, the multiple CSI-RS resources being aggregated correspond to the same frequency domain location. The same frequency domain location indicates that the resource aggregation method is time-domain aggregation. This frequency domain resource can be one or more subcarriers.

[0119] As an example, multiple CSI-RS resources being aggregated can occupy the same time-domain and frequency-domain resources. That is, the time-domain and frequency-domain locations corresponding to the aggregated CSI-RS resources are the same. The same time-domain and frequency-domain location indicates that the resource aggregation method is overlapping. In other words, when two CSI-RS resources have the same time-domain and frequency-domain location, the two CSI-RS resources overlap. When two CSI-RS resources overlap, the two CSI-RS resources can be time-division multiplexed (TDMed) or frequency-division multiplexed (FDMed).

[0120] To facilitate understanding, the following will be combined with... Figure 5 This paper provides an exemplary illustration of possible aggregation modes for low-frequency density NZP CSI-RS resources. Figure 5 Seven possible aggregation patterns are illustrated, namely patterns #0 to #6. Figure 5 In this context, numbers 0 to 3 can represent resources #0 to #3, respectively. Resources #0 to #3 can all be NZPCSI-RS resources with low frequency density. After aggregating different resources, the time-frequency position corresponding to any resource is a RB.

[0121] See Figure 5 In modes #0 and #1, resources #0 to #2 are aggregated. In mode #2, resources #0 and #1 are aggregated. In modes #3 to #6, resources #1 to #3 are aggregated.

[0122] Depend on Figure 5 It can be seen that in modes #0 and #3, the RE occupied by multiple low-frequency density NZP CSI-RS resources after aggregation is the same as the RE occupied by a ZP CSI-RS resource with a frequency density of 1. In modes #1, #2, and #6, the RE occupied by multiple low-frequency density NZP CSI-RS resources after aggregation is the same as the RE occupied by a ZP CSI-RS resource with a frequency density of 1 / 2. In modes #4 and #5, resources #0 and #2, or resources #1 and #3, occupy the same RE as a ZP CSI-RS resource with a frequency density of 1 / 2. Furthermore, in mode #4, resources #0 and #1, or resources #2 and #3, occupy the same RB, meaning the two resources overlap. Two NZP CSI-RS resources in one RB can be TDMed or FDMed.

[0123] The multiple CSI-RS resources indicated by the first configuration information can be fully aggregated or partially aggregated. Aggregation is indicated when at least two CSI-RS resources have the same time-domain and / or frequency-domain location. As an example, the at least two aggregated CSI-RS resources may have the same CSI-RS configuration parameters, or their CSI-RS configuration parameters may be different.

[0124] As an example, the at least two CSI-RS resources involved in the aggregation are N CSI-RS resources, where N is a positive integer. N can represent the number of CSI-RS resources participating in the aggregation. The N CSI-RS resources may or may not be in the same resource set. For example, within the same CSI-RS resource set, N is configured to indicate the number of NZP CSI-RS resources participating in the aggregation.

[0125] As one embodiment, at least two CSI-RS resources include a first CSI-RS resource and a second CSI-RS resource. The first CSI-RS resource is used to transmit the first CSI-RS, and the second CSI-RS resource is used to transmit the second CSI-RS. Since the first CSI-RS resource and the second CSI-RS resource correspond to the same time-domain and / or frequency-domain locations, the first CSI-RS and the second CSI-RS can multiplex the same RB through time-division multiplexing or frequency-division multiplexing. Figure 5 As shown, the two NZP CSI-RS resources in an RB can be TDMed or FDMed.

[0126] As an example, at least two CSI-RS resources being aggregated can correspond to one or two consecutive time slots. For instance, low-frequency density NZP CSI-RS resources being aggregated can be allocated in one or two consecutive time slots.

[0127] When at least two CSI-RS resources are aggregated, the RE density occupied by the aggregated CSI-RS resource can be 1 or 1 / 2. For example, to reduce the CSI-RS overhead of 48, 64, and 128 ports, the RE occupied by the aggregated low-frequency density NZPCSI-RS resource should be the same as the RE occupied by one or more ZP CSI-RS resources with a frequency density of 1 or 1 / 2.

[0128] As an example, when at least two CSI-RS resources being aggregated correspond to the same CSI-RS frequency density, the product of the number of the at least two CSI-RS resources and the CSI-RS frequency density is 1 or 1 / 2. For example, in the aggregation mode based on low-frequency density NZP CSI-RS, the number N of aggregated low-frequency density NZP CSI-RS resources and the CSI-RS frequency density ρ can satisfy the condition N×ρ=1 or N×ρ=1 / 2, and the aggregated low-frequency density NZP CSI-RS resources can be allocated as traditional resources in one or two consecutive time slots, so as to achieve port expansion and resource overhead reduction while controlling complexity.

[0129] When at least two CSI-RS resources from multiple CSI-RS resources are aggregated, the parameters for resource aggregation may include the number of aggregated CSI-RS resources N, the number of ports in each CSI-RS resource X, the CSI-RS frequency density ρ, and the number of CSI-RS ports P. CSI-RS The following example uses Table 2 as an illustration.

[0130] Table 2

[0131]

[0132]

[0133] As shown in Table 2, for the aggregation of 48 / 64 / 128 CSI-RS ports, N NZPCSI-RS resources in the same CSI-RS resource set support different frequency densities. Referring to Table 2, the specific configuration can be as follows: In a resource set aggregating 64 CSI-RS ports, N=4 or 2. When N=4, it represents the aggregation of 4 16-port NZP CSI-RS resources, and when N=2, it represents the aggregation of 2 32-port NZP CSI-RS resources. In a resource set aggregating 128 CSI-RS ports, when N=4, it represents the aggregation of 4 32-port NZPCSI-RS resources.

[0134] As an example, to support more CSI-RS ports, such as 256, multiple NZP CSI-RS resources can be aggregated in different time slots. For instance, for 256-port channel aggregation, N NZP CSI-RS resources can be located in two consecutive time slots.

[0135] Furthermore, network devices can extend the span of N NZP CSI-RS resources to accommodate a higher number of ports, while also extending the limitation of the same time period for all N NZP CSI-RS resources in the CSI-RS resource set. For terminal devices, CSI-RS or measurement results on all N NZP CSI-RS resources can be buffered until the next CSI-RS opportunity to update the NZP CSI-RS.

[0136] As an example, the periodicity or occasion of multiple CSI-RS resources indicated by the first configuration information can be different. For instance, within the same CSI-RS resource set, the system can allow N aggregated NZP CSI-RS resources to have different periods / occasion; that is, the N NZP CSI-RS resources can have different periods / offsets. Because the different periods / offsets cause CSI-RS at certain time-frequency locations to be not transmitted, the terminal device can allow the measurement results of the previously untransmitted CSI-RS to be cached and combined with the results of newly measured CSI-RS in subsequent occasions for CSI estimation / feedback at higher port counts, such as... Figure 6 As shown.

[0137] As one implementation, the at least two CSI-RS resources used for aggregation include a first CSI-RS resource and a second CSI-RS resource. The first CSI-RS resource is used to transmit the first CSI-RS, and the second CSI-RS resource is used to transmit the second CSI-RS. When the period of the first CSI-RS is less than the period of the second CSI-RS, and only the CSI-RS resource corresponding to the first CSI-RS is activated at the first moment, the CSI-RS measurement result at the first moment is determined based on the measurement result of the first CSI-RS at the first moment and the measurement result of the second CSI-RS at the second moment; wherein, the second moment is the transmission timing of the second CSI-RS prior to the first moment.

[0138] In this configuration, the first and second CSI-RS resources can be frequency-domain aggregated. That is, the first and second CSI-RS resources have the same or at least partially the same time-domain location. The measurement results of the second CSI-RS can be buffered provided that the channel remains essentially unchanged during this period (within the coherence time). For static channels, the channel characteristics remain essentially consistent across multiple time slots within the coherence time. This approach can utilize the channel's coherence time to optimize resource utilization and reduce redundancy. For codebook 1 feedback, the beam (W1) feedback also remains essentially unchanged during this period. This flexibility is most useful for periodic and semi-persistent CSI-RS. Therefore, it supports the aggregation of N CSI-RS resources corresponding to different CSI-RS periods to obtain more ports.

[0139] To facilitate understanding, the following will be combined with... Figure 6 Please provide an explanation. Figure 6 Taking port 128 as an example, the CSI-RS scenarios for different time periods are explained. See [link / reference] Figure 6 The 128 ports are divided into four port subsets, corresponding to four resources, namely resources #1 to #4. The frequency density of each of the four resources is 1 / 4. Each port subset includes 32 ports, meaning that each resource corresponds to 32 ports. The period for resources #1 and #3 is 5ms, and the period for resources #2 and #4 is 10ms.

[0140] like Figure 6 As shown, when T=0, all 128 ports are fully active, and the four resources corresponding to these 128 ports are used to transmit CSI-RS. When T=5ms, since resources #2 and #4 have a period of 10ms, they are not active at this time, so all 128 ports are partially active. When T=10ms, all four resources are active, thus returning to a fully active state. The state at T=15ms is the same as at T=5ms. The state at T=20ms is the same as at T=10ms. Therefore, at the time points of 5ms and 15ms, only two NZP CSI-RS resources are active, while the other two resources can buffer CSI-RS transmitted at previous CSI-RS times. Specifically, the buffered resources correspond to offsets of 0ms and 10ms, respectively. At 5ms, the two resources with a period of 10ms are not active and do not transmit CSI-RS; the result measured at 0ms is used instead. At 15ms, the two resources with a period of 10ms were also not activated and did not send CSI-RS; the result measured at 10ms was used instead.

[0141] Depend on Figure 6 It is known that two resources have a 5ms period (more frequent), while the other two resources have a 10ms period (sparser). At times 0ms, 10ms, and 20ms, all four resources are active, representing full-port opportunities, allowing the terminal device to obtain all four pieces of the 128-port puzzle at once. At times 5ms and 15ms, only the two resources with a 5ms period are active, representing partial-port opportunities. The measurement results for the ports corresponding to the other two resources can be supplemented by older measurement results cached by the terminal device. In other words, the network device does not need to send all CSI-RS data for the four NZP CSI-RS resources (each covering 32 ports) at every CSI-RS opportunity; instead, it only sends a portion of the CSI-RS data at certain times. For the measurement results of the ports corresponding to the remaining CSI-RS data, the terminal device can buffer or reuse the measurement results from the previous opportunity.

[0142] As an example, the terminal device can cache the measurement results of CSI-RS sent by all CSI-RS resources indicated by the first configuration information, and update some or all of the CSI-RS measurement results in the next CSI-RS time slot. That is, the terminal device does not necessarily need to obtain all four resources within the same time window to use them; instead, it can receive a subset (e.g., #1 / #2 first), cache the measurement results, and then fill the cache when #3 / #4 is received in subsequent time slots / time slots. Before the next CSI-RS update time slot arrives, the terminal device can continue to use this cache (the four resources collected in the previous round) as the basis for CSI inference. Figure 6 As shown, for full-port timings (0ms / 10ms / 20ms), the terminal device can obtain the results of CSI-RS resources #1 to #4, which are R1(t), R2(t), R3(t), and R4(t) respectively, and directly form a complete 128-port channel estimation result. For partial-port timings (5ms / 15ms), the terminal device only newly measures R1(t) and R3(t). The terminal device can retrieve R2(t-5ms) and R4(t-5ms) from the buffer, and then combine the two newly measured data points with the two buffered data points to form an approximately simultaneous 128-port equivalent channel, which is used for CSI derivation / feedback.

[0143] In step S420, the terminal device determines the corresponding first CSI-RS resource based on the first configuration information. The first configuration information can indicate the first CSI-RS resource corresponding to the terminal device. That is, the first configuration information is used to instruct the terminal device to receive CSI-RS.

[0144] The first configuration information may indicate only the first CSI-RS resource corresponding to the terminal device, or it may indicate multiple CSI-RS resources corresponding to the terminal device group to which the terminal device belongs. The multiple CSI-RS resources corresponding to the terminal device group can be fully or partially aggregated based on the first configuration information. The configuration parameters of the multiple CSI-RS resources can be the same or different, without limitation. The first configuration information can be used by the terminal device to determine the first CSI-RS resource from the fully or partially aggregated multiple CSI-RS resources.

[0145] As one embodiment, when the multiple CSI-RS resources indicated by the first configuration information also include a second CSI-RS resource, the CSI configuration parameters corresponding to the first CSI-RS resource and the second CSI-RS resource are the same, or the CSI configuration parameters corresponding to the first CSI-RS resource and the second CSI-RS resource are different. For example, the CSI-RS frequency density and / or number of ports corresponding to the first CSI-RS resource and the second CSI-RS resource are different, or the CSI-RS frequency density and / or number of ports corresponding to the first CSI-RS resource and the second CSI-RS resource are the same.

[0146] In some embodiments, the information indicated by the first configuration information is related to the type of terminal device. The terminal device can determine the first CSI-RS resource based on its own type. For a first type of terminal device, the first configuration information can be indicated with reference to traditional configuration methods. For a second type of terminal device, the first configuration information can also indicate the resource aggregation mode corresponding to multiple CSI-RS resources. Since the types of terminal devices within a cell are different, the CSI-RS sent by the network device can be configured differently based on the type of terminal device. For example, the network side can perform RRC layer CSI-RS related configurations separately for different terminal devices.

[0147] For example, for a first-class terminal device used as a traditional terminal, the network side can be configured to perform measurements and CSI reporting only on the first group of CSI-RS. Simultaneously, to avoid the second group of CSI-RS occupying REs affecting the downlink data reception of the traditional terminal device, the traditional terminal device can perform rate matching on the REs occupied by the second group of CSI-RS based on ZP CSI-RS resources. Specifically, the REs occupied by the second group of CSI-RS are matched with the REs occupied by ZP CSI-RS resources with a frequency density of 1 or 1 / 2.

[0148] For example, for a second type of terminal device as a new type of terminal, the network side can be configured to measure the second group of low-frequency density CSI-RS resources and aggregate multiple NZP CSI-RS resources according to a predetermined aggregation mode to form an equivalent multi-port channel estimation input. Simultaneously, to align with the rate matching mechanism of traditional terminal devices, the RE occupied by the aggregated low-frequency density NZP CSI-RS resources can be the same as the RE occupied by one or more ZP CSI-RS resources with a frequency density of 1 or 1 / 2.

[0149] As one embodiment, the first type of terminal device corresponds to the first group of CSI-RS, and the second type of terminal device corresponds to the second group of CSI-RS. When the resources of the first group of CSI-RS are aggregated with the resources of the second group of CSI-RS, the first type of terminal device matches the RE execution rate occupied by the second group of CSI-RS based on the ZP CSI-RS resources.

[0150] As one embodiment, when the terminal device is a first type of terminal device, the first configuration information may only instruct the terminal device to receive CSI-RS and CSI reports on the corresponding CSI-RS resources. When the terminal device is a second type of terminal device, the first configuration information may not only instruct the terminal device to receive CSI-RS and CSI reports on the corresponding CSI-RS resources, but may also instruct the resource aggregation mode.

[0151] As one embodiment, when the terminal device is a first type of terminal device, the first configuration information instructs the terminal device to measure the CSI-RS transmitted on the first CSI-RS resource; when the terminal device is a second type of terminal device, the first configuration information instructs the terminal device to measure the CSI-RS transmitted on the first CSI-RS resource and the resource aggregation mode corresponding to the first CSI-RS resource. As mentioned above, the resource aggregation mode can be one of frequency domain aggregation, time domain aggregation, or overlap.

[0152] As mentioned above, multiple terminal devices or groups of terminal devices may have different capabilities. For example, the capabilities of the first type of terminal device may differ from those of the second type of terminal device. The following section will provide a detailed explanation of the differences in capability information among multiple terminal devices.

[0153] As one example, the capability information of the terminal device includes whether the terminal device supports CSI-RS resource aggregation. Traditional terminal devices that do not support CSI-RS resource aggregation are classified as Type 1 terminal devices, while new terminal devices that support CSI-RS resource aggregation are classified as Type 2 terminal devices. On the network side, network devices can issue different CSI-RS resource / resource set configurations to different terminal devices based on whether they support CSI-RS resource aggregation, thereby enabling the coexistence of traditional and new terminal devices within the same cell.

[0154] In the above embodiments, although traditional terminal devices do not support CSI-RS resource aggregation, the CSI-RS resources corresponding to traditional terminal devices can be aggregated with the CSI-RS resources corresponding to new terminal devices. When receiving CSI-RS, traditional terminal devices can treat their non-corresponding CSI-RS resources as ZP CSI-RS resources.

[0155] As one example, the capability information of the terminal device includes the number of ports supported by the terminal device (i.e., port scale). Traditional terminal devices with a number of ports less than or equal to the first parameter are classified as Class I terminal devices, while new terminal devices with a number of ports greater than the first parameter are classified as Class II terminal devices. On the network side, network devices can issue different CSI-RS resource / resource set configurations to different terminal devices based on the number of ports supported by the terminal devices, thereby enabling the coexistence of traditional and new terminal devices within the same cell.

[0156] As one embodiment, the capability information of the terminal device includes the CSI-RS frequency density supported by the terminal device. Traditional terminal devices with a CSI-RS frequency density greater than or equal to 1 or 1 / 2 are classified as Class I terminal devices, while new terminal devices with a CSI-RS frequency density less than 1 or 1 / 2 are classified as Class II terminal devices. On the network side, network devices can issue different CSI-RS resource / resource set configurations to different terminal devices based on their supported CSI-RS frequency densities, thereby enabling the coexistence of traditional and new terminal devices within the same cell.

[0157] As one example, the capability information of the terminal device includes whether the terminal device supports a specified type of codebook or CSI report. Traditional terminal devices that do not support a specified type of codebook or CSI report are classified as Type 1 terminal devices, while newer terminal devices that support a specified type of codebook or CSI report are classified as Type 2 terminal devices. On the network side, network devices can issue different CSI-RS resource / resource set configurations to different terminal devices based on whether they support a specified type of codebook or CSI report, thereby enabling the coexistence of traditional and newer terminal devices within the same cell.

[0158] In the above embodiments, the specified type of codebook can be a novel codebook specifically designed for scenarios such as multi-port or high bandwidth. For example, the specified type of codebook can be a codebook designed based on a subset of effective ports. The specified type of CSI report can be a CSI report based on the novel codebook, or it can be a CSI report with relatively high complexity.

[0159] As one example, the capability information of the terminal device includes the maximum number of effective ports supported by the terminal device. The maximum number of effective ports can be represented as L. eff,maxTraditional terminal devices with a maximum number of effective ports less than or equal to the specified parameter are classified as Category I terminal devices, while new terminal devices with a maximum number of effective ports greater than the specified parameter are classified as Category II terminal devices. On the network side, network devices can issue different CSI-RS resource / resource set configurations to different terminal devices based on the maximum number of effective ports supported by the terminal devices, thereby enabling the coexistence of traditional and new terminal devices within the same cell.

[0160] As one example, the capability information of the terminal device includes the maximum number of subbands supported by the terminal device. Traditional terminal devices with a maximum subband number less than or equal to a specified parameter are classified as Class I terminal devices, while new terminal devices with a maximum subband number greater than the specified parameter are classified as Class II terminal devices. On the network side, network devices can issue different CSI-RS resource / resource set configurations to different terminal devices based on the maximum number of subbands supported by the terminal devices, thereby enabling the coexistence of traditional and new terminal devices within the same cell.

[0161] As one example, the capability information of the terminal device includes the types of services supported by the terminal device. On the network side, network devices can issue different CSI-RS resource / resource set configurations to different terminal devices based on the types of services they support, thereby enabling the coexistence of traditional and new terminal devices within the same cell.

[0162] As one example, the capability information of the terminal device includes its mobility, coverage level, or location. On the network side, network devices can issue different CSI-RS resource / resource set configurations to different terminal devices based on their mobility, coverage level, or location, thereby enabling the coexistence of traditional and new terminal devices within the same cell. For example, low-speed service terminal devices and high-speed / edge terminal devices may have different requirements for CSI update frequency and subband accuracy; therefore, terminal devices can be grouped according to their mobility or location region.

[0163] In the above embodiments, conventional terminal devices can measure the first set of CSI-RS, while novel terminal devices can measure the second set of CSI-RS and perform resource aggregation. Simultaneously, conventional terminal devices can utilize ZP CSI-RS to perform rate matching on the REs occupied by the second set of CSI-RS, ensuring backward compatibility and service continuity.

[0164] In the aforementioned embodiments, for parameters such as service type and mobility, the network side can group existing terminal devices (UE grouping) based on the terminal device's capability information and configure different CSI-RS resources / resource sets and CSI report configurations for different terminal device groups. For example, based on different service types supported by the terminal devices, or by grouping traditional terminal devices according to their service / mobility / coverage levels, each group's CSI configuration can be matched with its most effective CSI overhead. Based on this approach, the scheduler will be more stable.

[0165] For example, for the first type of terminal group in traditional terminal equipment (e.g., terminal equipment that only supports existing CSI-RS density / port configurations), the network side can configure it to measure only the first group of CSI-RS, and can configure it to match the RE execution rate occupied by the other group of CSI-RS based on ZP CSI-RS resources to ensure backward compatibility. For the second type of terminal group in traditional terminal equipment (e.g., terminal equipment with stronger capabilities, supporting larger ports or more complex reports), the network side can configure different CSI-RS resource sets for it, or pre-configure multiple sets of port subset IDs / panel groups, so that it measures only one group in each CSI process, thereby controlling measurement complexity and resource overhead without changing the basic behavior of existing terminal equipment. Here, different CSI-RS resource sets can refer to different combinations of port numbers / densities, or different CSI processes / resource sets.

[0166] In some embodiments, the first configuration information can indicate the first CSI-RS resource corresponding to the terminal device through a group ID corresponding to the terminal device. As one embodiment, the terminal device group to which the terminal device belongs corresponds to the first group ID. The first group ID is used by the network device to configure the first CSI-RS resource via RRC signaling. The first group ID can also be used to configure the set of CSI-RS measured by the terminal device.

[0167] As an example, the network side can determine a terminal group identifier (UE groupID) for each terminal device and configure the CSI-RS set measured / reported by the terminal device at the RRC layer based on the terminal group identifier.

[0168] The above text combined Figures 4 to 6 This paper introduces a method for aggregating multiple CSI-RS resources for different terminal devices or groups of terminal devices. This method is applicable to massive MIMO and broadband scenarios, providing a mechanism that supports more flexible CSI-RS resource organization and aggregation, scalable frequency domain sampling / density configuration, and reduces feedback dimensionality by combining techniques such as effective port subsets / hierarchical feedback.

[0169] Furthermore, when multiple CSI-RS resources are configured based on the capabilities of terminal devices, this method can also enable the network to provide a more efficient way to acquire CSI for new terminal devices without sacrificing the availability of existing terminal devices through capability indication and compatibility design of terminal devices, thereby better serving the evolution of 5G and the continuous expansion towards 6G.

[0170] The above text combined Figures 1 to 6 The method embodiments of this application are described in detail below. Figures 7 to 9 The present application provides a detailed description of the apparatus embodiments. It should be understood that the descriptions of the apparatus embodiments correspond to the descriptions of the method embodiments; therefore, any parts not described in detail can be found in the foregoing method embodiments.

[0171] Figure 7 This is a schematic block diagram of a device for wireless communication according to an embodiment of this application. The device 700 can be any of the terminal devices described above. Figure 7 The apparatus 700 shown includes a receiving unit 710 and a processing unit 720.

[0172] The receiving unit 710 can be used to receive first configuration information, which is used to indicate CSI-RS configuration.

[0173] The processing unit 720 can be used to determine the corresponding first CSI-RS resource according to the first configuration information; wherein the first CSI-RS resource is one of the plurality of CSI-RS resources indicated by the first configuration information, at least two of the plurality of CSI-RS resources have the same time domain position and / or frequency domain position, and the plurality of CSI-RS resources are used for multiple terminal devices or multiple terminal device groups to receive CSI-RS.

[0174] Optionally, the CSI-RS configuration includes at least one of the following: CSI-RS resources or CSI-RS resource sets, CSI-RS configuration parameters, CSI report configuration information, and CSI-RS resource aggregation mode.

[0175] Optionally, the configuration parameters of the CSI-RS include at least one of the following: CSI-RS frequency density, number of CSI-RS ports, and CSI-RS period.

[0176] Optionally, the CSI-RS frequency density includes at least one of the following: 1 / 3, 1 / 4, 1 / 6, 1 / 8.

[0177] Optionally, when the product of the size of the sub-band corresponding to the CSI-RS configuration and the CSI-RS frequency density is not an integer, the sub-band corresponding to the CSI-RS configuration satisfies at least one of the following: when the CSI-RS frequency density includes 1 / 3 or 1 / 6, the size of the sub-band includes a multiple of 3 or 6; the sub-band is divided into n partial sub-bands, where n is a positive integer.

[0178] Optionally, the number of CSI-RS ports includes at least one of the following: 48, 64, 128, 256.

[0179] Optionally, when the number of CSI-RS ports is greater than the first parameter, the multiple ports corresponding to the CSI-RS configuration are divided into multiple port subsets, each port subset in the multiple port subsets corresponds to a CSI-RS resource, and the multiple CSI-RS resources corresponding to the multiple port subsets belong to the multiple CSI-RS resources indicated by the first configuration information.

[0180] Optionally, at least two of the plurality of CSI-RS resources have the same configuration parameters for their corresponding CSIs, or at least two of the plurality of CSI-RS resources have different configuration parameters for their corresponding CSIs.

[0181] Optionally, the at least two CSI-RS resources include the first CSI-RS resource and the second CSI-RS resource. The first CSI-RS resource is used to transmit the first CSI-RS, and the second CSI-RS resource is used to transmit the second CSI-RS. The first CSI-RS and the second CSI-RS reuse the same resource block through time division multiplexing or frequency division multiplexing.

[0182] Optionally, the at least two CSI-RS resources correspond to the same CSI-RS frequency density, and the product of the number of the at least two CSI-RS resources and the CSI-RS frequency density is 1 or 1 / 2.

[0183] Optionally, the at least two CSI-RS resources include the first CSI-RS resource and the second CSI-RS resource. The first CSI-RS resource is used to transmit the first CSI-RS, and the second CSI-RS resource is used to transmit the second CSI-RS. When the period of the first CSI-RS is less than the period of the second CSI-RS, and only the CSI-RS resource corresponding to the first CSI-RS is activated at the first moment, the CSI-RS measurement result at the first moment is determined based on the measurement result of the first CSI-RS at the first moment and the measurement result of the second CSI-RS at the second moment. The second moment is the transmission timing of the second CSI-RS before the first moment.

[0184] Optionally, the capabilities of the multiple terminal devices or the group of multiple terminal devices may differ, and the capabilities may include at least one of the following: whether the terminal device supports CSI-RS resource aggregation; the number of ports supported by the terminal device; the CSI-RS frequency density supported by the terminal device; whether the terminal device supports a specified type of codebook or CSI report; the maximum number of effective ports supported by the terminal device; the maximum number of subbands supported by the terminal device; the service types supported by the terminal device; the mobility of the terminal device; the coverage level corresponding to the terminal device; and the location of the terminal device.

[0185] Optionally, the terminal device group to which the terminal device belongs corresponds to a first group of identifiers, and the first group of identifiers is used by the network device to configure the first CSI-RS resource through RRC signaling.

[0186] Optionally, the plurality of terminal device groups include a first terminal device group and a second terminal device group, wherein the first terminal device group corresponds to a first type of terminal device and the second terminal device group corresponds to a second type of terminal device; when the terminal device is a first type of terminal device, the first configuration information instructs the terminal device to measure the CSI-RS transmitted on the first CSI-RS resource; when the terminal device is a second type of terminal device, the first configuration information instructs the terminal device to measure the CSI-RS transmitted on the first CSI-RS resource and the resource aggregation mode corresponding to the first CSI-RS resource.

[0187] Optionally, the plurality of CSI-RS resources are non-zero power CSI-RS resources, and the plurality of CSI-RS resources correspond to one time slot or two consecutive time slots.

[0188] Optionally, the processing unit 720 in the device 700 can be a processor 910, the receiving unit 710 can be a transceiver 930, and the device 700 may also include a memory 920, specifically as follows: Figure 9 As shown.

[0189] Figure 8 This is a schematic block diagram of another device for wireless communication according to an embodiment of this application. The device 800 can be any of the network devices described above. Figure 8 The device 800 shown includes a transmitting unit 810.

[0190] The transmitting unit 810 can be used to transmit first configuration information; wherein, the first configuration information is used to indicate CSI-RS configuration, the first configuration information is used by the terminal device to determine the corresponding first CSI-RS resource, the first CSI-RS resource is one of a plurality of CSI-RS resources indicated by the first configuration information, at least two of the plurality of CSI-RS resources have the same time domain position and / or frequency domain position, and the plurality of CSI-RS resources are used by multiple terminal devices or multiple terminal device groups to receive CSI-RS.

[0191] Optionally, the CSI-RS configuration includes at least one of the following: CSI-RS resources or CSI-RS resource sets, CSI-RS configuration parameters, CSI report configuration information, and CSI-RS resource aggregation mode.

[0192] Optionally, the configuration parameters of the CSI-RS include at least one of the following: CSI-RS frequency density, number of CSI-RS ports, and CSI-RS period.

[0193] Optionally, the CSI-RS frequency density includes at least one of the following: 1 / 3, 1 / 4, 1 / 6, 1 / 8.

[0194] Optionally, when the product of the size of the sub-band corresponding to the CSI-RS configuration and the CSI-RS frequency density is not an integer, the sub-band corresponding to the CSI-RS configuration satisfies at least one of the following: when the CSI-RS frequency density includes 1 / 3 or 1 / 6, the size of the sub-band includes a multiple of 3 or 6; the sub-band is divided into n partial sub-bands, where n is a positive integer.

[0195] Optionally, the number of CSI-RS ports includes at least one of the following: 48, 64, 128, 256.

[0196] Optionally, when the number of CSI-RS ports is greater than the first parameter, the multiple ports corresponding to the CSI-RS configuration are divided into multiple port subsets, each port subset in the multiple port subsets corresponds to a CSI-RS resource, and the multiple CSI-RS resources corresponding to the multiple port subsets belong to the multiple CSI-RS resources indicated by the first configuration information.

[0197] Optionally, at least two of the plurality of CSI-RS resources have the same configuration parameters for their corresponding CSIs, or at least two of the plurality of CSI-RS resources have different configuration parameters for their corresponding CSIs.

[0198] Optionally, the at least two CSI-RS resources include the first CSI-RS resource and the second CSI-RS resource. The first CSI-RS resource is used to transmit the first CSI-RS, and the second CSI-RS resource is used to transmit the second CSI-RS. The first CSI-RS and the second CSI-RS reuse the same resource block through time division multiplexing or frequency division multiplexing.

[0199] Optionally, the at least two CSI-RS resources correspond to the same CSI-RS frequency density, and the product of the number of the at least two CSI-RS resources and the CSI-RS frequency density is 1 or 1 / 2.

[0200] Optionally, the at least two CSI-RS resources include the first CSI-RS resource and the second CSI-RS resource. The first CSI-RS resource is used to transmit the first CSI-RS, and the second CSI-RS resource is used to transmit the second CSI-RS. When the period of the first CSI-RS is less than the period of the second CSI-RS, and only the CSI-RS resource corresponding to the first CSI-RS is activated at the first moment, the CSI-RS measurement result at the first moment is determined based on the measurement result of the first CSI-RS at the first moment and the measurement result of the second CSI-RS at the second moment. The second moment is the transmission timing of the second CSI-RS before the first moment.

[0201] Optionally, the capabilities of the multiple terminal devices or the group of multiple terminal devices may differ, and the capabilities may include at least one of the following: whether the terminal device supports CSI-RS resource aggregation; the number of ports supported by the terminal device; the CSI-RS frequency density supported by the terminal device; whether the terminal device supports a specified type of codebook or CSI report; the maximum number of effective ports supported by the terminal device; the maximum number of subbands supported by the terminal device; the service types supported by the terminal device; the mobility of the terminal device; the coverage level corresponding to the terminal device; and the location of the terminal device.

[0202] Optionally, the terminal device group to which the terminal device belongs corresponds to a first group of identifiers, and the first group of identifiers is used by the network device to configure the first CSI-RS resource through RRC signaling.

[0203] Optionally, the plurality of terminal device groups include a first terminal device group and a second terminal device group, wherein the first terminal device group corresponds to a first type of terminal device and the second terminal device group corresponds to a second type of terminal device; when the terminal device is a first type of terminal device, the first configuration information instructs the terminal device to measure the CSI-RS transmitted on the first CSI-RS resource; when the terminal device is a second type of terminal device, the first configuration information instructs the terminal device to measure the CSI-RS transmitted on the first CSI-RS resource and the resource aggregation mode corresponding to the first CSI-RS resource.

[0204] Optionally, the plurality of CSI-RS resources are non-zero power CSI-RS resources, and the plurality of CSI-RS resources correspond to one time slot or two consecutive time slots.

[0205] Optionally, the transmitting unit 810 in device 800 can be a transceiver 930, and device 800 may further include a processor 910 and a memory 920, specifically as follows: Figure 9 As shown.

[0206] Figure 9 The diagram shown is a structural schematic of a communication device according to an embodiment of this application. Figure 9 The dashed lines indicate that the unit or module is optional. The device 900 can be used to implement the methods described in the above method embodiments. The device 900 can be a chip, a terminal device, or a network device.

[0207] The apparatus 900 may include one or more processors 910. The processor 910 may support the apparatus 900 in implementing the methods described in the preceding method embodiments. The processor 910 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0208] The apparatus 900 may further include one or more memories 920. The memories 920 store a program that can be executed by the processor 910, causing the processor 910 to perform the methods described in the preceding method embodiments. The memories 920 may be independent of the processor 910 or integrated within the processor 910.

[0209] The device 900 may also include a transceiver 930. The processor 910 can communicate with other devices or chips via the transceiver 930. For example, the processor 910 can send and receive data with other devices or chips via the transceiver 930.

[0210] This application also provides a computer-readable storage medium for storing a program. This computer-readable storage medium can be applied to a terminal device or network device provided in this application embodiment, and the program causes a computer to execute the methods performed by the terminal device or network device in the various embodiments of this application.

[0211] The computer-readable storage medium can be any available medium that a computer can read, or a data storage device such as a server or data center that integrates one or more available media. The available medium can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs, DVDs), or semiconductor media (e.g., solid-state disks, SSDs), etc.

[0212] This application also provides a computer program product. The computer program product includes a program. This computer program product can be applied to a terminal device or network device provided in the embodiments of this application, and the program causes a computer to execute the methods performed by the terminal device or network device in the various embodiments of this application.

[0213] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means.

[0214] This application also provides a computer program. This computer program can be applied to the terminal device or network device provided in this application, and the computer program causes the computer to execute the methods performed by the terminal device or network device in various embodiments of this application.

[0215] In this application, the terms "system" and "network" are used interchangeably. Furthermore, the terminology used in this application is only for explaining specific embodiments of the application and is not intended to limit the application. The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. In addition, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0216] In the embodiments of this application, the term "instruction" can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0217] In the embodiments of this application, the term "correspondence" may indicate a direct or indirect correspondence between two things, or an association between two things, or a relationship such as instruction and being instructed, configuration and being configured.

[0218] In the embodiments of this application, "predefined" or "preconfigured" can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices). This application does not limit the specific implementation method. For example, predefined can refer to what is defined in the protocol.

[0219] In the embodiments of this application, the term "protocol" may refer to standard protocols in the field of communications, such as LTE protocols, NR protocols, and related protocols applied in future communication systems. This application does not limit the scope of these protocols.

[0220] In the embodiments of this application, determining B based on A does not mean determining B solely based on A; B can also be determined based on A and / or other information.

[0221] In the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0222] In the embodiments of this application, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0223] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0224] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0225] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0226] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for wireless communication, characterized in that, include: The terminal device receives first configuration information, which is used to indicate the configuration of the Channel State Information Reference Signal (CSI-RS). The terminal device determines the corresponding first CSI-RS resource based on the first configuration information; Wherein, the first CSI-RS resource is one of the plurality of CSI-RS resources indicated by the first configuration information, at least two of the plurality of CSI-RS resources have the same time domain location and / or frequency domain location, and the plurality of CSI-RS resources are used for multiple terminal devices or multiple terminal device groups to receive CSI-RS.

2. The method according to claim 1, characterized in that, The CSI-RS configuration includes at least one of the following: CSI-RS resources or CSI-RS resource sets, CSI-RS configuration parameters, CSI report configuration information, and CSI-RS resource aggregation mode.

3. The method according to claim 2, characterized in that, The configuration parameters of the CSI-RS include at least one of the following: CSI-RS frequency density, number of CSI-RS ports, and CSI-RS period.

4. The method according to claim 3, characterized in that, The CSI-RS frequency density includes at least one of the following: 1 / 3, 1 / 4, 1 / 6, 1 / 8.

5. The method according to claim 3 or 4, characterized in that, When the product of the size of the subband corresponding to the CSI-RS configuration and the CSI-RS frequency density is not an integer, the subband corresponding to the CSI-RS configuration satisfies at least one of the following: When the CSI-RS frequency density includes 1 / 3 or 1 / 6, the size of the sub-band includes a multiple of 3 or 6; The sub-band is divided into n partial sub-bands, where n is a positive integer.

6. The method according to any one of claims 3-5, characterized in that, The number of CSI-RS ports includes at least one of the following: 48, 64, 128, and 256.

7. The method according to any one of claims 3-6, characterized in that, When the number of CSI-RS ports is greater than the first parameter, the multiple ports corresponding to the CSI-RS configuration are divided into multiple port subsets. Each port subset corresponds to a CSI-RS resource, and the multiple CSI-RS resources corresponding to the multiple port subsets belong to the multiple CSI-RS resources indicated by the first configuration information.

8. The method according to any one of claims 3-7, characterized in that, The configuration parameters of the CSI corresponding to at least two of the plurality of CSI-RS resources are the same, or the configuration parameters of the CSI corresponding to at least two of the plurality of CSI-RS resources are different.

9. The method according to any one of claims 1-8, characterized in that, The at least two CSI-RS resources include the first CSI-RS resource and the second CSI-RS resource. The first CSI-RS resource is used to transmit the first CSI-RS, and the second CSI-RS resource is used to transmit the second CSI-RS. The first CSI-RS and the second CSI-RS reuse the same resource block by time division multiplexing or frequency division multiplexing.

10. The method according to any one of claims 1-9, characterized in that, The at least two CSI-RS resources have the same CSI-RS frequency density, and the product of the number of the at least two CSI-RS resources and the CSI-RS frequency density is 1 or 1 / 2.

11. The method according to any one of claims 1-10, characterized in that, The at least two CSI-RS resources include the first CSI-RS resource and the second CSI-RS resource. The first CSI-RS resource is used to transmit the first CSI-RS, and the second CSI-RS resource is used to transmit the second CSI-RS. When the period of the first CSI-RS is less than the period of the second CSI-RS, and only the CSI-RS resource corresponding to the first CSI-RS is activated at the first moment, the CSI-RS measurement result at the first moment is determined based on the measurement result of the first CSI-RS at the first moment and the measurement result of the second CSI-RS at the second moment. The second moment is the transmission timing of the second CSI-RS before the first moment.

12. The method according to any one of claims 1-11, characterized in that, The multiple terminal devices or the group of multiple terminal devices have different capabilities, and the capabilities include at least one of the following: Does the terminal device support the aggregation of CSI-RS resources? The number of ports supported by the terminal device; CSI-RS frequency density supported by terminal equipment; Does the terminal device support the specified type of codebook or CSI report? The maximum number of valid ports supported by the terminal device; The maximum number of subbands supported by the terminal device; The types of services supported by the terminal device; The mobility of terminal devices; The coverage level corresponding to the terminal equipment; Location of the terminal device.

13. The method according to any one of claims 1-12, characterized in that, The terminal device group to which the terminal device belongs corresponds to the first group of identifiers. The first group of identifiers is used by the network device to configure the first CSI-RS resource through Radio Resource Control (RRC) signaling.

14. The method according to any one of claims 1-13, characterized in that, The plurality of terminal device groups include a first terminal device group and a second terminal device group, wherein the first terminal device group corresponds to a first type of terminal device and the second terminal device group corresponds to a second type of terminal device; when the terminal device is a first type of terminal device, the first configuration information instructs the terminal device to measure the CSI-RS transmitted on the first CSI-RS resource; when the terminal device is a second type of terminal device, the first configuration information instructs the terminal device to measure the CSI-RS transmitted on the first CSI-RS resource and the resource aggregation mode corresponding to the first CSI-RS resource.

15. The method according to any one of claims 1-14, characterized in that, The multiple CSI-RS resources are non-zero power CSI-RS resources, and the multiple CSI-RS resources correspond to one time slot or two consecutive time slots.

16. A method for wireless communication, characterized in that, include: The network device sends the first configuration information; Wherein, the first configuration information is used to indicate the configuration of the Channel State Information Reference Signal (CSI-RS), the first configuration information is used by the terminal device to determine the corresponding first CSI-RS resource, the first CSI-RS resource is one of the plurality of CSI-RS resources indicated by the first configuration information, at least two of the plurality of CSI-RS resources have the same time domain position and / or frequency domain position, and the plurality of CSI-RS resources are used by multiple terminal devices or multiple terminal device groups to receive CSI-RS.

17. The method according to claim 16, characterized in that, The CSI-RS configuration includes at least one of the following: CSI-RS resources or CSI-RS resource sets, CSI-RS configuration parameters, CSI report configuration information, and CSI-RS resource aggregation mode.

18. The method according to claim 17, characterized in that, The configuration parameters of the CSI-RS include at least one of the following: CSI-RS frequency density, number of CSI-RS ports, and CSI-RS period.

19. The method according to claim 18, characterized in that, The CSI-RS frequency density includes at least one of the following: 1 / 3, 1 / 4, 1 / 6, 1 / 8.

20. The method according to claim 18 or 19, characterized in that, When the product of the size of the subband corresponding to the CSI-RS configuration and the CSI-RS frequency density is not an integer, the subband corresponding to the CSI-RS configuration satisfies at least one of the following: When the CSI-RS frequency density includes 1 / 3 or 1 / 6, the size of the sub-band includes a multiple of 3 or 6; The sub-band is divided into n partial sub-bands, where n is a positive integer.

21. The method according to any one of claims 18-20, characterized in that, The number of CSI-RS ports includes at least one of the following: 48, 64, 128, and 256.

22. The method according to any one of claims 18-21, characterized in that, When the number of CSI-RS ports is greater than the first parameter, the multiple ports corresponding to the CSI-RS configuration are divided into multiple port subsets. Each port subset corresponds to a CSI-RS resource, and the multiple CSI-RS resources corresponding to the multiple port subsets belong to the multiple CSI-RS resources indicated by the first configuration information.

23. The method according to any one of claims 18-22, characterized in that, The configuration parameters of the CSI corresponding to at least two of the plurality of CSI-RS resources are the same, or the configuration parameters of the CSI corresponding to at least two of the plurality of CSI-RS resources are different.

24. The method according to any one of claims 16-23, characterized in that, The at least two CSI-RS resources include the first CSI-RS resource and the second CSI-RS resource. The first CSI-RS resource is used to transmit the first CSI-RS, and the second CSI-RS resource is used to transmit the second CSI-RS. The first CSI-RS and the second CSI-RS reuse the same resource block by time division multiplexing or frequency division multiplexing.

25. The method according to any one of claims 16-24, characterized in that, The at least two CSI-RS resources have the same CSI-RS frequency density, and the product of the number of the at least two CSI-RS resources and the CSI-RS frequency density is 1 or 1 / 2.

26. The method according to any one of claims 16-25, characterized in that, The at least two CSI-RS resources include the first CSI-RS resource and the second CSI-RS resource. The first CSI-RS resource is used to transmit the first CSI-RS, and the second CSI-RS resource is used to transmit the second CSI-RS. When the period of the first CSI-RS is less than the period of the second CSI-RS, and only the CSI-RS resource corresponding to the first CSI-RS is activated at the first moment, the CSI-RS measurement result at the first moment is determined based on the measurement result of the first CSI-RS at the first moment and the measurement result of the second CSI-RS at the second moment. The second moment is the transmission timing of the second CSI-RS before the first moment.

27. The method according to any one of claims 16-26, characterized in that, The multiple terminal devices or the group of multiple terminal devices have different capabilities, and the capabilities include at least one of the following: Does the terminal device support the aggregation of CSI-RS resources? The number of ports supported by the terminal device; CSI-RS frequency density supported by terminal equipment; Does the terminal device support the specified type of codebook or CSI report? The maximum number of valid ports supported by the terminal device; The maximum number of subbands supported by the terminal device; The types of services supported by the terminal device; The mobility of terminal devices; The coverage level corresponding to the terminal equipment; Location of the terminal device.

28. The method according to any one of claims 16-27, characterized in that, The terminal device group to which the terminal device belongs corresponds to the first group of identifiers. The first group of identifiers is used by the network device to configure the first CSI-RS resource through Radio Resource Control (RRC) signaling.

29. The method according to any one of claims 16-28, characterized in that, The plurality of terminal device groups include a first terminal device group and a second terminal device group, wherein the first terminal device group corresponds to a first type of terminal device and the second terminal device group corresponds to a second type of terminal device; when the terminal device is a first type of terminal device, the first configuration information instructs the terminal device to measure the CSI-RS transmitted on the first CSI-RS resource; when the terminal device is a second type of terminal device, the first configuration information instructs the terminal device to measure the CSI-RS transmitted on the first CSI-RS resource and the resource aggregation mode corresponding to the first CSI-RS resource.

30. The method according to any one of claims 16-29, characterized in that, The multiple CSI-RS resources are non-zero power CSI-RS resources, and the multiple CSI-RS resources correspond to one time slot or two consecutive time slots.

31. A device for wireless communication, characterized in that, The device is a terminal device, and the device includes: The receiving unit is configured to receive first configuration information, which is used to indicate the configuration of the Channel State Information Reference Signal (CSI-RS). The processing unit is configured to determine the corresponding first CSI-RS resource based on the first configuration information; Wherein, the first CSI-RS resource is one of the plurality of CSI-RS resources indicated by the first configuration information, at least two of the plurality of CSI-RS resources have the same time domain location and / or frequency domain location, and the plurality of CSI-RS resources are used for multiple terminal devices or multiple terminal device groups to receive CSI-RS.

32. The apparatus according to claim 31, characterized in that, The CSI-RS configuration includes at least one of the following: CSI-RS resources or CSI-RS resource sets, CSI-RS configuration parameters, CSI report configuration information, and CSI-RS resource aggregation mode.

33. The apparatus according to claim 32, characterized in that, The configuration parameters of the CSI-RS include at least one of the following: CSI-RS frequency density, number of CSI-RS ports, and CSI-RS period.

34. The apparatus according to claim 33, characterized in that, The CSI-RS frequency density includes at least one of the following: 1 / 3, 1 / 4, 1 / 6, 1 / 8.

35. The apparatus according to claim 33 or 34, characterized in that, When the product of the size of the subband corresponding to the CSI-RS configuration and the CSI-RS frequency density is not an integer, the subband corresponding to the CSI-RS configuration satisfies at least one of the following: When the CSI-RS frequency density includes 1 / 3 or 1 / 6, the size of the sub-band includes a multiple of 3 or 6; The sub-band is divided into n partial sub-bands, where n is a positive integer.

36. The apparatus according to any one of claims 33-35, characterized in that, The number of CSI-RS ports includes at least one of the following: 48, 64, 128, and 256.

37. The apparatus according to any one of claims 33-36, characterized in that, When the number of CSI-RS ports is greater than the first parameter, the multiple ports corresponding to the CSI-RS configuration are divided into multiple port subsets. Each port subset corresponds to a CSI-RS resource, and the multiple CSI-RS resources corresponding to the multiple port subsets belong to the multiple CSI-RS resources indicated by the first configuration information.

38. The apparatus according to any one of claims 33-37, characterized in that, The configuration parameters of the CSI corresponding to at least two of the plurality of CSI-RS resources are the same, or the configuration parameters of the CSI corresponding to at least two of the plurality of CSI-RS resources are different.

39. The apparatus according to any one of claims 31-38, characterized in that, The at least two CSI-RS resources include the first CSI-RS resource and the second CSI-RS resource. The first CSI-RS resource is used to transmit the first CSI-RS, and the second CSI-RS resource is used to transmit the second CSI-RS. The first CSI-RS and the second CSI-RS reuse the same resource block by time division multiplexing or frequency division multiplexing.

40. The apparatus according to any one of claims 31-39, characterized in that, The at least two CSI-RS resources have the same CSI-RS frequency density, and the product of the number of the at least two CSI-RS resources and the CSI-RS frequency density is 1 or 1 / 2.

41. The apparatus according to any one of claims 31-40, characterized in that, The at least two CSI-RS resources include the first CSI-RS resource and the second CSI-RS resource. The first CSI-RS resource is used to transmit the first CSI-RS, and the second CSI-RS resource is used to transmit the second CSI-RS. When the period of the first CSI-RS is less than the period of the second CSI-RS, and only the CSI-RS resource corresponding to the first CSI-RS is activated at the first moment, the CSI-RS measurement result at the first moment is determined based on the measurement result of the first CSI-RS at the first moment and the measurement result of the second CSI-RS at the second moment. The second moment is the transmission timing of the second CSI-RS before the first moment.

42. The apparatus according to any one of claims 31-41, characterized in that, The multiple terminal devices or the group of multiple terminal devices have different capabilities, and the capabilities include at least one of the following: Does the terminal device support the aggregation of CSI-RS resources? The number of ports supported by the terminal device; CSI-RS frequency density supported by terminal equipment; Does the terminal device support the specified type of codebook or CSI report? The maximum number of valid ports supported by the terminal device; The maximum number of subbands supported by the terminal device; The types of services supported by the terminal device; The mobility of terminal devices; The coverage level corresponding to the terminal equipment; Location of the terminal device.

43. The apparatus according to any one of claims 31-42, characterized in that, The terminal device group to which the terminal device belongs corresponds to the first group of identifiers. The first group of identifiers is used by the network device to configure the first CSI-RS resource through Radio Resource Control (RRC) signaling.

44. The apparatus according to any one of claims 31-43, characterized in that, The plurality of terminal device groups include a first terminal device group and a second terminal device group, wherein the first terminal device group corresponds to a first type of terminal device and the second terminal device group corresponds to a second type of terminal device; when the terminal device is a first type of terminal device, the first configuration information instructs the terminal device to measure the CSI-RS transmitted on the first CSI-RS resource; when the terminal device is a second type of terminal device, the first configuration information instructs the terminal device to measure the CSI-RS transmitted on the first CSI-RS resource and the resource aggregation mode corresponding to the first CSI-RS resource.

45. The apparatus according to any one of claims 31-44, characterized in that, The multiple CSI-RS resources are non-zero power CSI-RS resources, and the multiple CSI-RS resources correspond to one time slot or two consecutive time slots.

46. ​​A device for wireless communication, characterized in that, The device is a network device, and the device includes: A sending unit, used to send the first configuration information; Wherein, the first configuration information is used to indicate the configuration of the Channel State Information Reference Signal (CSI-RS), the first configuration information is used by the terminal device to determine the corresponding first CSI-RS resource, the first CSI-RS resource is one of the plurality of CSI-RS resources indicated by the first configuration information, at least two of the plurality of CSI-RS resources have the same time domain position and / or frequency domain position, and the plurality of CSI-RS resources are used by multiple terminal devices or multiple terminal device groups to receive CSI-RS.

47. The apparatus according to claim 46, characterized in that, The CSI-RS configuration includes at least one of the following: CSI-RS resources or CSI-RS resource sets, CSI-RS configuration parameters, CSI report configuration information, and CSI-RS resource aggregation mode.

48. The apparatus according to claim 47, characterized in that, The configuration parameters of the CSI-RS include at least one of the following: CSI-RS frequency density, number of CSI-RS ports, and CSI-RS period.

49. The apparatus according to claim 48, characterized in that, The CSI-RS frequency density includes at least one of the following: 1 / 3, 1 / 4, 1 / 6, 1 / 8.

50. The apparatus according to claim 48 or 49, characterized in that, When the product of the size of the subband corresponding to the CSI-RS configuration and the CSI-RS frequency density is not an integer, the subband corresponding to the CSI-RS configuration satisfies at least one of the following: When the CSI-RS frequency density includes 1 / 3 or 1 / 6, the size of the sub-band includes a multiple of 3 or 6; The sub-band is divided into n partial sub-bands, where n is a positive integer.

51. The apparatus according to any one of claims 48-50, characterized in that, The number of CSI-RS ports includes at least one of the following: 48, 64, 128, and 256.

52. The apparatus according to any one of claims 48-51, characterized in that, When the number of CSI-RS ports is greater than the first parameter, the multiple ports corresponding to the CSI-RS configuration are divided into multiple port subsets. Each port subset corresponds to a CSI-RS resource, and the multiple CSI-RS resources corresponding to the multiple port subsets belong to the multiple CSI-RS resources indicated by the first configuration information.

53. The apparatus according to any one of claims 48-52, characterized in that, The configuration parameters of the CSI corresponding to at least two of the plurality of CSI-RS resources are the same, or the configuration parameters of the CSI corresponding to at least two of the plurality of CSI-RS resources are different.

54. The apparatus according to any one of claims 46-53, characterized in that, The at least two CSI-RS resources include the first CSI-RS resource and the second CSI-RS resource. The first CSI-RS resource is used to transmit the first CSI-RS, and the second CSI-RS resource is used to transmit the second CSI-RS. The first CSI-RS and the second CSI-RS reuse the same resource block by time division multiplexing or frequency division multiplexing.

55. The apparatus according to any one of claims 46-54, characterized in that, The at least two CSI-RS resources have the same CSI-RS frequency density, and the product of the number of the at least two CSI-RS resources and the CSI-RS frequency density is 1 or 1 / 2.

56. The apparatus according to any one of claims 46-55, characterized in that, The at least two CSI-RS resources include the first CSI-RS resource and the second CSI-RS resource. The first CSI-RS resource is used to transmit the first CSI-RS, and the second CSI-RS resource is used to transmit the second CSI-RS. When the period of the first CSI-RS is less than the period of the second CSI-RS, and only the CSI-RS resource corresponding to the first CSI-RS is activated at the first moment, the CSI-RS measurement result at the first moment is determined based on the measurement result of the first CSI-RS at the first moment and the measurement result of the second CSI-RS at the second moment. The second moment is the transmission timing of the second CSI-RS before the first moment.

57. The apparatus according to any one of claims 46-56, characterized in that, The multiple terminal devices or the group of multiple terminal devices have different capabilities, and the capabilities include at least one of the following: Does the terminal device support the aggregation of CSI-RS resources? The number of ports supported by the terminal device; CSI-RS frequency density supported by terminal equipment; Does the terminal device support the specified type of codebook or CSI report? The maximum number of valid ports supported by the terminal device; The maximum number of subbands supported by the terminal device; The types of services supported by the terminal device; The mobility of terminal devices; The coverage level corresponding to the terminal equipment; Location of the terminal device.

58. The apparatus according to any one of claims 46-57, characterized in that, The terminal device group to which the terminal device belongs corresponds to the first group of identifiers. The first group of identifiers is used by the network device to configure the first CSI-RS resource through Radio Resource Control (RRC) signaling.

59. The apparatus according to any one of claims 46-58, characterized in that, The plurality of terminal device groups include a first terminal device group and a second terminal device group, wherein the first terminal device group corresponds to a first type of terminal device and the second terminal device group corresponds to a second type of terminal device; when the terminal device is a first type of terminal device, the first configuration information instructs the terminal device to measure the CSI-RS transmitted on the first CSI-RS resource; when the terminal device is a second type of terminal device, the first configuration information instructs the terminal device to measure the CSI-RS transmitted on the first CSI-RS resource and the resource aggregation mode corresponding to the first CSI-RS resource.

60. The apparatus according to any one of claims 46-59, characterized in that, The multiple CSI-RS resources are non-zero power CSI-RS resources, and the multiple CSI-RS resources correspond to one time slot or two consecutive time slots.

61. A communication device, characterized in that, It includes a memory and a processor, the memory being used to store a program, and the processor being used to invoke the program in the memory to perform the method as described in any one of claims 1-30.

62. An apparatus, characterized in that, Includes a processor for calling a program from memory to perform the method as described in any one of claims 1-30.

63. A chip, characterized in that, Includes a processor for calling a program from memory, causing a device on which the chip is mounted to perform the method as described in any one of claims 1-30.

64. A computer-readable storage medium, characterized in that, It contains a program that causes a computer to perform the method as described in any one of claims 1-30.

65. A computer program product, characterized in that, Includes a program that causes a computer to perform the method as described in any one of claims 1-30.

66. A computer program, characterized in that, The computer program causes the computer to perform the method as described in any one of claims 1-30.

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