Data transmission method, base station, user terminal, storage medium, electronic device, and computer program product
Patent Information
- Application Number
- PCT/CN2025/145780
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-02-19
- Filing Date
- 2025-12-25
- Publication Date
- 2026-08-27
Smart Images
Figure CN2025145780_27082026_PF_FP_ABST
Abstract
Description
Data transmission methods, base stations, user terminals, storage media, electronic devices, and computer program products
[0001] Cross-reference to related applications
[0002] This disclosure is based on and claims priority to Chinese patent application CN202510185118.4, filed on February 19, 2025, entitled “Data Transmission Method, Base Station, User Terminal, Storage Medium, Electronic Device and Computer Program Product”, and incorporates the entire contents of that patent application by reference. Technical Field
[0003] This disclosure relates to the field of communications, and more specifically, to a data transmission method, a base station, a user terminal, a storage medium, an electronic device, and a computer program product. Background Technology
[0004] As users increasingly demand high-speed and stable wireless communication, the number of antennas on the base station side is also increasing. Very large-scale antenna arrays (VMAs) require accurate Channel State Information (CSI) to realize their performance advantages. In 5G New Radio (NR), the base station transmits a Channel State Information-Reference Signal (CSI-RS), and the user equipment (UE) measures and reports the channel state information. Currently, 32-port CSI-RS is supported, and with the increase in the number of base station antennas, future support for 64, 128, or even 256-port CSI-RS may be further enhanced.
[0005] Each CSI-RS port requires transmission on a Time-Frequency Resource Element (RE). As the number of CSI-RS ports increases, the number of resource elements required also increases, leading to greater pilot overhead. Each user requires independent CSI-RS resources for channel state information measurement and reporting. CSI-RS overhead increases exponentially with the number of users, and the resource elements carrying CSI-RS cannot be used for data transmission. Therefore, the increased CSI-RS pilot overhead leads to increased load on the entire communication network and reduced transmission efficiency. Summary of the Invention
[0006] This disclosure provides a data transmission method and apparatus to at least address the problem in the related art where increased CSI-RS pilot overhead leads to increased load on the entire communication network and reduced transmission efficiency.
[0007] According to one embodiment of this disclosure, a data transmission method is provided, applied to a base station, comprising:
[0008] The configuration for sending Channel State Information Reference Signal (CSI-RS) to the UE includes resource configuration for a first type of CSI-RS, resource configuration for a second type of CSI-RS, and a first indication, wherein the first indication is used to instruct the UE to perform measurements based on the first type of CSI-RS and to instruct the UE to report the measurement results based on the second type of CSI-RS; wherein the resources configured for the first type of CSI-RS are less than the resources configured for the second type of CSI-RS.
[0009] According to another embodiment of this disclosure, a data transmission method is provided, applied to a UE, comprising:
[0010] The configuration includes a Channel State Information Reference Signal (CSI-RS) sent by a base station; the configuration includes a resource configuration for a first type of CSI-RS, a resource configuration for a second type of CSI-RS, and a first indication, wherein the first indication is used to instruct the UE to perform measurements based on the first type of CSI-RS and to instruct the UE to report the measurement results based on the second type of CSI-RS; wherein the resources configured for the first type of CSI-RS are less than the resources configured for the second type of CSI-RS.
[0011] According to yet another embodiment of this disclosure, a base station is also provided, the base station being used to implement the steps in any of the above method embodiments.
[0012] According to yet another embodiment of this disclosure, a user terminal is also provided, wherein the base station is used to implement the steps in any of the above method embodiments.
[0013] According to yet another embodiment of this disclosure, a computer-readable storage medium is also provided, wherein a computer program is stored therein, wherein the computer program is configured to perform the steps in any of the above method embodiments when it is run.
[0014] According to yet another embodiment of this disclosure, an electronic device is also provided, including a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.
[0015] According to yet another embodiment of this disclosure, a computer program product is also provided, including a computer program that, when executed by a processor, implements the steps in any of the above method embodiments.
[0016] In this embodiment, CSI-RS configuration is sent to the UE. The configuration includes resource configuration for a first type of CSI-RS, resource configuration for a second type of CSI-RS, and a first indication. The first indication instructs the UE to perform measurements based on the first type of CSI-RS and to report the measurement results based on the second type of CSI-RS. The resources configured for the first type of CSI-RS are less than those configured for the second type of CSI-RS. Decoupling the actual measurement resources (first type of CSI-RS) from the reporting configuration resources (second type of CSI-RS) reduces the number of reference signals actually transmitted, thereby reducing pilot overhead. This solves the problem in related technologies where increased CSI-RS pilot overhead leads to increased load on the entire communication network and reduced transmission efficiency. Attached Figure Description
[0017] Figure 1 is a schematic diagram of the resource configuration of CSI-RS according to an embodiment of this disclosure;
[0018] Figure 2 is a schematic diagram of a 32-port CSI-RS pilot pattern according to an embodiment of the present disclosure;
[0019] Figure 3 is a hardware structure block diagram of the mobile terminal operating in the embodiments of the method disclosed herein;
[0020] Figure 4 is a flowchart of a data transmission method according to an embodiment of the present disclosure;
[0021] Figure 5 is a flowchart of a data transmission method according to another embodiment of the present disclosure;
[0022] Figure 6 is a schematic diagram of CSI-RS used for beam management in related technologies;
[0023] Figure 7 is a schematic diagram of CSI-RS used for beam management according to an embodiment of the present disclosure;
[0024] Figure 8 is a schematic diagram of a local CSI-RS resource set and a global CSI-RS resource set according to an embodiment of the present disclosure;
[0025] Figure 9 is a schematic diagram of nonlinear mapping according to an embodiment of the present disclosure;
[0026] Figure 10 is a schematic diagram of antenna port mapping in related technologies;
[0027] Figure 11 is a schematic diagram of a scheme for obtaining CSI based on local CSI-RS resources according to an embodiment of the present disclosure;
[0028] Figure 12 is a structural block diagram of an electronic device according to an embodiment of the present disclosure. Detailed Implementation
[0029] The embodiments of this disclosure will be described in detail below with reference to the accompanying drawings and examples.
[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0031] In 5G NR, the base station can pre-configure at least one CSI-RS resource configuration for each UE. For example, Figure 1 is a schematic diagram of CSI-RS resource configuration according to an embodiment of this disclosure. As shown in Figure 1, each resource configuration may contain at least one CSI-RS resource set, and each CSI-RS resource set may contain at least one CSI-RS resource.
[0032] In addition, each CSI-RS resource configuration can also include the resource type of the CSI-RS (such as periodic, semi-persistent, or aperiodic) and its corresponding bandwidth part (BWP).
[0033] Different resource sets can be used for measurements in different usage scenarios, such as measurements in beam management scenarios or measurements in user CSI acquisition scenarios. Each resource set contains multiple CSI-RS resources, and different CSI-RS resources need to occupy different transmission resources (including but not limited to time domain, frequency domain, code domain, etc.). In downlink measurements, the UE can measure all CSI-RS resources and select the CSI-RS resource with the best channel quality or best channel state information to report its index (CSI-RS Resource Indicator, CRI) and the measurement results obtained based on this CSI-RS resource. The measurement results can be the Precoding Matrix Indicator (PMI), Channel Quality Information (CQI), Layer 1 Reference Signal Received Power (L1-RSRP), etc.
[0034] Furthermore, each CSI-RS resource can contain at least one CSI-RS port, and different ports can be distinguished using time division, frequency division, or code division methods. For example, Figure 2 is a schematic diagram of a 32-port CSI-RS pilot pattern according to an embodiment of this disclosure. As shown in Figure 2, a resource block (RB) can include 32 resource elements, and the 32 ports need to be carried on 32 resource elements. In Figure 2, they are divided into 4 code division multiplexing (CDM) groups, and 8 CSI-RS ports in each CDM group perform code division multiple access. As the number of antennas increases, in order to obtain a more accurate channel, the number of CSI-RS ports also increases. For example, 64, 128, or even more ports may be needed, resulting in a multiple increase in the CSI-RS pilot overhead.
[0035] Based on the aforementioned technical problems, this disclosure provides a data transmission method that pre-configures resources for two types of Channel State Information Reference Signals (CSI-RS) for the UE. The resources configured for the first type of CSI-RS are less than those configured for the second type of CSI-RS. The first type of CSI-RS is configured for channel measurement, while the second type of CSI-RS is configured for reporting measurement results. This decouples the reporting configuration from the resource configuration, reduces the number of reference signals actually transmitted, thereby reducing pilot overhead, reducing the load on the communication network, and improving transmission efficiency.
[0036] The method embodiments provided in this disclosure can be executed in a mobile terminal, computer terminal, or similar computing device. Taking running on a mobile terminal as an example, FIG3 is a hardware structure block diagram of the mobile terminal running the method embodiments of this disclosure. As shown in FIG3, the mobile terminal may include one or more (only one is shown in FIG3) processors 302 (processor 302 may include, but is not limited to, processing devices such as microprocessors MCUs or programmable logic devices FPGAs) and a memory 304 for storing data. The mobile terminal may also include a transmission device 306 for communication functions and an input / output device 308. Those skilled in the art will understand that the structure shown in FIG3 is only illustrative and does not limit the structure of the mobile terminal. For example, the mobile terminal may also include more or fewer components than shown in FIG3, or have a different configuration than shown in FIG3.
[0037] The memory 304 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the data transmission method in this embodiment. The processor 302 executes various functional applications and data processing by running the computer program stored in the memory 304, thus implementing the aforementioned method. The memory 304 may include high-speed random access memory and non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 304 may further include memory remotely located relative to the processor 302, and these remote memories can be connected to the mobile terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.
[0038] The transmission device 306 is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the mobile terminal's communication provider. In one example, the transmission device 306 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device 306 may be a Radio Frequency (RF) module, used for wireless communication with the Internet.
[0039] This embodiment provides a data transmission method operating on the aforementioned mobile terminal. Figure 4 is a flowchart of the data transmission method according to an embodiment of this disclosure, applied to a base station. As shown in Figure 4, the process includes the following steps:
[0040] Step S401: Send the configuration of Channel State Information Reference Signal (CSI-RS) to the UE; the configuration includes resource configuration of a first type of CSI-RS, resource configuration of a second type of CSI-RS, and a first indication, the first indication being used to instruct the UE to perform measurements based on the first type of CSI-RS and to instruct the UE to report the measurement results based on the second type of CSI-RS; wherein, the resources configured for the first type of CSI-RS are less than the resources configured for the second type of CSI-RS.
[0041] In this embodiment of the disclosure, the base station can pre-configure a first type of CSI-RS and a second type of CSI-RS for the UE. The resource allocation for the first type of CSI-RS can be dedicated to channel measurements performed by the UE, and the resource allocation for the second type of CSI-RS can be dedicated to reporting measurement results by the UE. The base station can instruct the UE to perform measurements based on the first type of CSI-RS and instruct the UE to report measurement results based on the second type of CSI-RS in the configuration.
[0042] As an example, the first type of CSI-RS can be used for actual channel measurement, and the second type of CSI-RS can be used for UE to report measurement results. In this embodiment of the disclosure, the resources configured for the first type of CSI-RS are less than the resources configured for the second type of CSI-RS, so that the UE can perform measurements based only on the resources configured for the first type of CSI-RS. Since these resources are fewer, the transmission of actual reference signals is reduced, and the overhead of pilot signals is reduced.
[0043] In this embodiment, CSI-RS configuration is sent to the UE. The configuration includes resource configuration for a first type of CSI-RS, resource configuration for a second type of CSI-RS, and a first indication. The first indication instructs the UE to perform measurements based on the first type of CSI-RS and to report the measurement results based on the second type of CSI-RS. The resources configured for the first type of CSI-RS are less than those configured for the second type of CSI-RS. This decouples the actual measurement resources (first type of CSI-RS) from the reporting configuration resources (second type of CSI-RS), reducing the number of reference signals actually transmitted, thereby reducing pilot overhead, lowering the load on the communication network, and improving transmission efficiency.
[0044] In one exemplary embodiment, the resources of the second type of CSI-RS are configured as virtual resources.
[0045] For example, virtual resources are those that do not actually occupy any resource units (REs) at the physical layer. The resource configuration of Type II CSI-RS is virtual, meaning that the ports or resource sets of Type II CSI-RS do not appear in the actual transmission of the wireless interface, and they do not carry any power signals or data information. Therefore, the associated REs can be used for data transmission, avoiding resource waste.
[0046] The second type of CSI-RS configuration uses virtual resources for UE to report measurement results. By using virtual resources for CSI reporting, the UE can effectively reduce the actual overhead of pilot signals while ensuring that the base station can receive and process channel state information from a more comprehensive resource perspective. In massively multi-input multiple-output (MIMO) systems, the actual CSI-RS resource overhead can be extremely high. Using virtual resources for reporting can significantly improve resource utilization efficiency while maintaining the quality of channel feedback.
[0047] In one exemplary embodiment, it further includes:
[0048] Based on the resources configured in the first type of CSI-RS, the first type of CSI-RS is sent to the UE.
[0049] As an example, after CSI-RS configuration is completed or after the configuration is sent to the UE, the base station can send CSI-RS to the UE based on the resources configured for Type I CSI-RS, i.e., Type I CSI-RS. Type I CSI-RS can be carried on the resources configured for Type I CSI-RS and used by the UE to measure channel state information. By sending Type I CSI-RS, and not all CSI-RS, the base station can significantly reduce pilot signal overhead, optimize network resource utilization, and thus improve network spectral efficiency and data transmission rate.
[0050] In one exemplary embodiment, it further includes:
[0051] Send a second indication to the UE indicating the mapping relationship between the first type of CSI-RS and the second type of CSI-RS.
[0052] As an example, the base station can indicate the mapping relationship between the first type of CSI-RS and the second type of CSI-RS to the UE so that the user can perform measurements based on the resource configuration of the first type of CSI-RS, but report based on the resource configuration of the second type of CSI-RS.
[0053] As an example, the type of mapping relationship can include at least one of the following: linear mapping, nonlinear mapping.
[0054] In one exemplary embodiment, sending a second indication to the UE indicating the mapping relationship between the first type of CSI-RS and the second type of CSI-RS includes:
[0055] The second indication is sent to the UE via downlink signaling, wherein the downlink signaling includes at least one of the following: Radio Resource Control (RRC) signaling, Media Access Control Unit (MAC-CE) signaling, and Downlink Control Information (DCI) signaling.
[0056] In one exemplary embodiment, the mapping relationship includes at least one of the following: a preset mapping matrix, parameters of a preset AI model, a preset nonlinear mapping function, and a quasi-co-addressable QCL relationship.
[0057] As an example, the mapping relationship can be notified to the UE by the base station through downlink signaling. Downlink signaling may include, but is not limited to, Radio Resource Control (RRC) signaling, Media Access Control-Control Element (MAC-CE), Downlink Control Information (DCI), etc.
[0058] As an example, the mapping relationship can be explicitly notified to the UE by the base station. For example, the base station can directly notify the UE of the preset mapping matrix, the parameters of the preset AI model, the nonlinear mapping function, etc. Alternatively, the base station can only notify the UE of the mapping relationship between the first type of CSI-RS and the second type of CSI-RS. For example, the base station can notify the UE of the quasi-colocation (QCL) relationship of CSI-RS in the two CSI-RS resource sets.
[0059] In one exemplary embodiment, the mapping relationship includes a quasi-co-address (QCL) relationship, and indicating the mapping relationship between the first type of CSI-RS resources and the second type of CSI-RS resources to the UE includes:
[0060] The Transmission Configuration Indication (TCI) indicates the QCL relationship to the UE; wherein the type of the QCL relationship includes at least one of the following: QCL-Type A, QCL-Type B, QCL-Type C, and QCL-Type D.
[0061] As an example, the base station can inform the UE of the QCL relationship between the Type 1 CSI-RS and the Type 2 CSI-RS through the Transmission Configuration Indication (TCI).
[0062] For example, the resource configuration of the first type of CSI-RS is a local CSI-RS resource set, and the resource configuration of the second type of CSI-RS is a global CSI-RS resource set. The base station can notify the user of the QCL relationship between the global CSI-RS resource set and the local CSI-RS resource set through TCI. Furthermore, a local CSI-RS resource set can have QCL relationships with multiple different global CSI-RS resource sets, and these relationships can be of different types. Table 1 shows the different QCL types, as shown in Table 1 below:
[0063] Table 1
[0064] In one exemplary embodiment, the resources of the first type of CSI-RS and the resources of the second type of CSI-RS are both configured as a CSI-RS resource set, wherein the resources of the first type of CSI-RS are configured as a local CSI-RS resource set, and the resources of the second type of CSI-RS are configured as a global CSI-RS resource set.
[0065] In wireless communication, CSI-RS is transmitted on a transmission resource grid using specific resource elements. The resource configuration of CSI-RS can be a set of CSI-RS resources or CSI-RS resources within a resource set.
[0066] As an example, the resources of both the first type of CSI-RS and the second type of CSI-RS can be configured as a CSI-RS resource set, the resources of the first type of CSI-RS can be configured as a local CSI-RS resource set, and the resources of the second type of CSI-RS can be configured as a global CSI-RS resource set.
[0067] The local CSI-RS resource set and the global CSI-RS resource set define the location, structure, and parameters of these CSI-RS in the time domain, frequency domain, and code domain, respectively. Each resource set can contain at least one CSI-RS resource, and each CSI-RS resource corresponds to a specific antenna port, beam pattern, or modulation scheme, which determines the transmission method of the CSI-RS.
[0068] For example, when CSI-RS is used for beam management, CSI-RS resources can be configured in the form of resource sets. Each resource set can contain at least one CSI-RS resource, which can be used for different purposes, such as channel measurement, beam management, and CSI feedback. The configuration of resource sets involves not only the time-frequency location of the resources, but also the resource type (e.g., periodic, semi-persistent, aperiodic), beam pattern, QCL information, etc.
[0069] When CSI-RS is used for beam management, its primary goal is to determine the optimal beam direction to optimize downlink and uplink communication quality. In this scenario, the base station transmits multiple different beams, each associated with one or more CSI-RS resources. The UE needs to measure the performance of each beam, such as RSRP or SINR, and select the beam with the best performance for subsequent communication.
[0070] Since beam management involves comparing the performance of multiple beams, the base station can configure multiple CSI-RS resource sets for the UE. Each set contains one or more CSI-RS resources, and each resource corresponds to a different beam or beam combination. In this way, the UE can independently measure each resource set, thereby comparing the performance of different beams and ultimately selecting the best beam for feedback. The resource set format facilitates the management and differentiation of CSI-RS resources for different beams, making beam management and selection processes more efficient and accurate.
[0071] In one exemplary embodiment, the global CSI-RS resource set is a zero-power CSI-RS resource set.
[0072] As an example, a zero-power CSI-RS resource set can refer to a set of resources at the physical layer that does not actually transmit any pilot signals or data carriers. Configuring the CSI-RS resource set to zero power provides the UE with a complete CSI reporting format and framework. Even if the UE only uses local CSI-RS resources for actual channel measurements, the UE still needs to follow the format of the global resource set when reporting, which helps the base station make more accurate resource scheduling and precoding decisions.
[0073] By using the zero-power resource set as the global resource set, it can be ensured that no additional wireless resources are occupied, thereby improving the overall resource utilization efficiency of the system.
[0074] In one exemplary embodiment, the first indication is used to indicate at least one of the following:
[0075] The UE is instructed to perform channel measurements based on the local CSI-RS resource set;
[0076] The UE is instructed to report the measurement results based on the global CSI-RS resource set;
[0077] The UE is instructed not to report the local CSI-RS resource set.
[0078] Instruct the UE not to perform measurements on the global CSI-RS resource set.
[0079] As an example, the base station can configure a local CSI-RS resource set for each UE. The time / frequency / code resources occupied by the local CSI-RS resource set are less than those of the global CSI-RS resource set. The base station can instruct the UE that the local CSI-RS resources are only used for the configuration of reference signals actually transmitted and not for reporting. When reporting, the global CSI-RS resource set is used for reporting.
[0080] As an example, the base station can configure a reporting method based on a global CSI-RS resource set for each UE, that is, instruct the UE to report measurement results based on a global CSI-RS resource set. More comprehensive CSI information can be obtained based on the global CSI-RS resource set. However, the aforementioned global CSI-RS resource set is only used for reporting configuration and is not used for the actual downlink transmission reference signal configuration.
[0081] In one exemplary embodiment, the CSI-RS resource set includes at least one CSI-RS resource, and the mapping relationship is a mapping relationship between the CSI-RS resources in the local CSI-RS resource set and the CSI-RS resources in the global CSI-RS resource set.
[0082] As an example, the base station can indicate to the UE the mapping relationship between the local CSI-RS resource set and the global CSI-RS resource set, so that the UE can convert the measurement results based on the local resources into information that conforms to the format of the global resource set for CSI reporting.
[0083] For example, in beam management scenarios, the primary purpose of CSI-RS is to help the UE and base station determine the optimal beam direction to enhance the quality of the communication link. Beam management typically involves performance evaluation of multiple beams, each of which needs to be represented by one or more CSI-RS resources. Therefore, the mapping relationship between local and global CSI-RS resource sets is designed at the resource set level, rather than at individual ports.
[0084] Beam management requires a holistic evaluation of the performance of different beams, not just the performance of individual ports. Therefore, by mapping resources in the local resource set to resources in the global resource set, it can be ensured that the UE can evaluate and provide feedback on global beam performance based on local measurement results.
[0085] Furthermore, each of the multiple beams involved in beam management can use a different CSI-RS resource set. The mapping relationship at the resource set level is more flexible, can adapt to the measurement requirements of different beams, and simplifies the configuration and management process between the base station and the UE.
[0086] By mapping the CSI-RS resources in the local CSI-RS resource set to the CSI-RS resources in the global CSI-RS resource set, the measurement results of the local resource set can be extended or interpreted as the channel state of the global resource set, thereby saving resources while maintaining the comprehensiveness and accuracy of CSI reporting.
[0087] In wireless communication systems, there is a balance between measurement resources and feedback information. Too many measurement resources increase pilot overhead and reduce data transmission efficiency; conversely, too few measurement resources can lead to incomplete and inaccurate feedback information. By defining local and global resource sets and establishing mapping relationships between these resources, the system can maintain the quality of feedback information while conserving resources. Each resource in the local resource set can be associated with one or more resources in the global resource set. This allows the UE to conserve resources during measurement while inferring the overall system state through mapping relationships, thus finding the optimal balance between resource efficiency and information accuracy.
[0088] In one exemplary embodiment, both the resources of the first type of CSI-RS and the resources of the second type of CSI-RS are configured as CSI-RS resources, wherein the resources of the first type of CSI-RS are configured as local CSI-RS resources, and the resources of the second type of CSI-RS are configured as global CSI-RS resources; the global CSI-RS resources and the local CSI-RS resources are located within the same CSI-RS resource set.
[0089] As an example, when CSI-RS is used to acquire CSI, the goal is to comprehensively understand the channel state, including channel quality, precoding matrix information (PMI), Layer 1 reference signal received power (L1-RSRP), etc., to support base station resource scheduling and precoding decisions. In this case, the base station needs to obtain channel quality information for each antenna port from the UE to construct an accurate channel matrix. However, directly configuring and transmitting a large number of CSI-RS ports (e.g., 256 ports) consumes excessive radio resources and reduces communication efficiency. To reduce pilot overhead while maintaining the comprehensiveness and accuracy of CSI feedback, embodiments of this disclosure also propose a scheme for configuring local (fewer ports) and global (more ports) CSI-RS resources within the same resource set.
[0090] As an example, local CSI-RS resources can be used for actual channel measurements, while global CSI-RS resources do not transmit actual signals but can be used to define a complete set of antenna ports. The UE can perform measurements based on local CSI-RS resources and report the measurement results based on global CSI-RS resources. This configuration method ensures the comprehensiveness and accuracy of channel state information acquisition while reducing the overhead of actual pilot signals and improving resource utilization efficiency.
[0091] By configuring local and global resources within the same CSI-RS resource set, the base station can simplify the UE's resource management process while ensuring the comprehensiveness and standardization of CSI feedback. Local resources allow the UE to perform channel measurements with limited pilot overhead, while the global resource set defines the complete format of CSI reporting, enabling the conversion of local measurement results into CSI feedback covering all ports even if the UE does not measure all ports, through mapping relationships.
[0092] In one exemplary embodiment, the first indication is used to indicate at least one of the following:
[0093] The UE is instructed to perform channel measurements based on the local CSI-RS resources;
[0094] The UE is instructed to report the measurement results based on the global CSI-RS resources;
[0095] The UE is instructed not to report the local CSI-RS resources.
[0096] Instruct the UE not to measure the global CSI-RS resources.
[0097] As an example, a base station can configure a CSI-RS resource set for each UE, and configure local CSI-RS resources and global CSI-RS resources within the same CSI-RS resource set. The local CSI-RS resources occupy fewer time / frequency / code resources than the global CSI-RS resources. The base station can instruct the UE that the local CSI-RS resources are used only for configuring reference signals to be actually transmitted and not for reporting; reporting is performed using the global CSI-RS resources.
[0098] As an example, the base station can configure a reporting method based on global CSI-RS resources for each UE, that is, instruct the UE to report measurement results based on global CSI-RS resources. More comprehensive CSI information can be obtained based on global CSI-RS resources. However, the aforementioned global CSI-RS resources are only used for reporting configuration and are not used for the actual downlink transmission reference signal configuration.
[0099] In one exemplary embodiment, each CSI-RS resource within the same CSI-RS resource set includes at least one CSI-RS port; the mapping relationship is the mapping relationship between the CSI-RS ports of the local CSI-RS resources and the CSI-RS ports of the global CSI-RS resources.
[0100] For example, in a CSI acquisition scenario, the purpose of CSI-RS is to collect detailed information about the channel state for precoding, resource scheduling, etc. Since CSI acquisition requires accurate channel state information, especially for massive MIMO systems where the performance of each port is crucial, the mapping relationship between Type I and Type II CSI-RS can be configured as a conversion between CSI-RS ports of local CSI-RS resources and CSI-RS ports of global CSI-RS resources.
[0101] In massive MIMO systems, each CSI-RS port can represent a specific antenna port or beam direction, and its measurement results directly affect the accuracy of the entire channel matrix. Port-level mapping ensures that local measurement results can be accurately mapped to every port globally, thus providing comprehensive and accurate CSI information.
[0102] The UE can perform measurements using local CSI-RS resources (i.e. fewer ports) and then deduce the status of global CSI-RS resources (i.e. more ports) through mapping relationships. This can significantly reduce the overhead of actual pilot signals, save radio resources, and improve system transmission efficiency.
[0103] In another embodiment, a data transmission method operating on the aforementioned mobile terminal is provided. Figure 5 is a flowchart of a data transmission method according to another embodiment of this disclosure, applied to a UE. As shown in Figure 5, the process includes the following steps:
[0104] Step 501: Receive the configuration of Channel State Information Reference Signal (CSI-RS) sent by the base station; the configuration includes resource configuration of a first type of CSI-RS, resource configuration of a second type of CSI-RS, and a first indication, wherein the first indication is used to instruct the UE to perform measurements based on the first type of CSI-RS and to instruct the UE to report the measurement results based on the second type of CSI-RS; wherein the resources configured for the first type of CSI-RS are less than the resources configured for the second type of CSI-RS.
[0105] In this embodiment, the UE can receive CSI-RS configuration sent by the base station. The configuration includes resource configuration for a first type of CSI-RS and a first indication of resource configuration for a second type of CSI-RS. The first indication is used to instruct the UE to perform measurements based on the first type of CSI-RS and to instruct the UE to report the measurement results based on the second type of CSI-RS. The resources configured for the first type of CSI-RS are less than those configured for the second type of CSI-RS. This decouples the actual measurement resources (first type of CSI-RS) from the reporting configuration resources (second type of CSI-RS), reducing the number of reference signals actually transmitted, thereby reducing pilot overhead, reducing the load on the communication network, and improving transmission efficiency.
[0106] In one exemplary embodiment, it further includes:
[0107] Receive the first type of CSI-RS sent by the base station;
[0108] Based on the first type of CSI-RS and the configuration, measurements are performed using the first type of CSI-RS, and the measurement results are reported to the base station using the second type of CSI-RS.
[0109] In one exemplary embodiment, the step of performing measurements based on the first type of CSI-RS and reporting the measurement results to the base station based on the second type of CSI-RS includes:
[0110] Measurements are performed based on the first type of CSI-RS to obtain the measurement results of the first type of CSI-RS;
[0111] Based on the mapping relationship between the first type of CSI-RS and the second type of CSI-RS, determine the measurement result of the second type of CSI-RS corresponding to the measurement result of the first type of CSI-RS;
[0112] Based on the second type of CSI-RS, the measurement results of the second type of CSI-RS are reported to the base station.
[0113] As an example, the UE can measure the first type of CSI-RS resources to obtain the measurement results of channel state information, such as the Reference Received Power (RSRP) and the Signal-to-Interference-plus-Noise Ratio (SINR). These measurement results can reflect the channel quality between the UE and the base station under different beams or antenna ports.
[0114] As an example, the UE can convert the measurement results of the first type of CSI-RS resource into the measurement results of the second type of CSI-RS resource based on the mapping relationship between the received first type of CSI-RS and the second type of CSI-RS. For example, through linear mapping, the UE can map the measurement data of M local CSI-RS ports to the equivalent measurement data of N global CSI-RS ports (where M is less than N, and M and N are positive integers); or nonlinear mapping, such as AI models, can be used to predict the channel performance on global CSI-RS resources, etc.
[0115] As an example, the UE can report the converted measurement results to the base station according to the configuration of the second type of CSI-RS resources. For example, when reporting, the UE can indicate a CSI-RS resource index CRI and CSI parameters calculated based on these resources, such as PMI, CQI, L1-RSRP, etc.
[0116] In one exemplary embodiment, it further includes:
[0117] The system receives a second indication of the mapping relationship between the first type of CSI-RS and the second type of CSI-RS sent by the base station.
[0118] In one exemplary embodiment, the resources of the second type of CSI-RS are configured as virtual resources.
[0119] In one exemplary embodiment, the resources of the first type of CSI-RS and the resources of the second type of CSI-RS are both configured as a CSI-RS resource set, wherein the resources of the first type of CSI-RS are configured as a local CSI-RS resource set, and the resources of the second type of CSI-RS are configured as a global CSI-RS resource set.
[0120] In one exemplary embodiment, the global CSI-RS resource set is a zero-power CSI-RS resource set.
[0121] In one exemplary embodiment, the first indication is used to indicate at least one of the following:
[0122] The UE is instructed to perform channel measurements based on the local CSI-RS resource set;
[0123] The UE is instructed to report the measurement results based on the global CSI-RS resource set;
[0124] The UE is instructed not to report the local CSI-RS resource set.
[0125] Instruct the UE not to perform measurements on the global CSI-RS resource set.
[0126] In one exemplary embodiment, the CSI-RS resource set includes at least one CSI-RS resource, and the mapping relationship is a mapping relationship between the CSI-RS resources in the local CSI-RS resource set and the CSI-RS resources in the global CSI-RS resource set.
[0127] In one exemplary embodiment, both the resources of the first type of CSI-RS and the resources of the second type of CSI-RS are configured as CSI-RS resources, wherein the resources of the first type of CSI-RS are configured as local CSI-RS resources, and the resources of the second type of CSI-RS are configured as global CSI-RS resources; the global CSI-RS resources and the local CSI-RS resources are located within the same CSI-RS resource set.
[0128] In one exemplary embodiment, the first indication is used to indicate at least one of the following:
[0129] The UE is instructed to perform channel measurements based on the local CSI-RS resources;
[0130] The UE is instructed to report the measurement results based on the global CSI-RS resources;
[0131] The UE is instructed not to report the local CSI-RS resources.
[0132] Instruct the UE not to measure the global CSI-RS resources.
[0133] In one exemplary embodiment, each CSI-RS resource within the same CSI-RS resource set includes at least one CSI-RS port; the mapping relationship is the mapping relationship between the CSI-RS ports of the local CSI-RS resources and the CSI-RS ports of the global CSI-RS resources.
[0134] In one exemplary embodiment, the second indication is an indication sent by the base station via downlink signaling, wherein the downlink signaling includes at least one of the following: Radio Resource Control (RRC) signaling, Media Access Control Unit (MAC-CE), and DCI.
[0135] In one exemplary embodiment, the mapping relationship includes at least one of the following: a preset mapping matrix, parameters of a preset AI model, a preset nonlinear mapping function, and a quasi-co-addressable QCL relationship.
[0136] In one exemplary embodiment, the mapping relationship includes a quasi-co-located QCL relationship, which is sent by the base station through a Transmission Configuration Instruction (TCI); wherein the type of the QCL relationship includes at least one of the following: QCL-TypeA, QCL-TypeB, QCL-TypeC, and QCL-TypeD.
[0137] The following uses two scenarios, beam management and CSI acquisition, as examples, and further illustrates the embodiments of this disclosure by comparing them with existing technical solutions.
[0138] Example 1: CSI-RS for Beam Management
[0139] 1. Existing technical solutions
[0140] Figure 6 illustrates the use of CSI-RS for beam management in related technologies. As shown in Figure 6, when CSI-RS is used for beam management, the base station can transmit each CSI-RS resource using a different beam. The user performs measurements and selects the strongest CSI-RS resource for reporting. Assume that there are N (N is a positive integer) downlink beams to be trained between base station A and user B. The base station configures the CSI-RS resource set for the UE with N CSI-RS resources, and in the reporting configuration, the base station sets the reporting quality to CRI-RSRP. At this time, the UE measures all N CSI-RS resources, calculates their RSRP, and selects the CSI-RS resource with the largest RSRP to report its RSRP and CRI.
[0141] In existing technical solutions, as the number of base station antennas and CSI-RS resources increases, the time-frequency resources used to transmit pilot signals also increase, resulting in a significant increase in the pilot overhead of Channel State Information (CSI).
[0142] 2. Solutions of the embodiments of the present disclosure
[0143] For example, FIG. 7 is a schematic diagram of CSI-RS for beam management according to an embodiment of the present disclosure. As shown in FIG. 7, it is also assumed that there are N downlink beams to be trained between the base station and the UE. To save pilot overhead, in resource configuration, the base station configures a local CSI-RS resource set containing M CSI-RS resources (M < N) for the UE, and the base station also configures a global CSI-RS resource set for the user, and the global CSI-RS resource set contains N CSI-RS resources. Among them, the global CSI-RS resource set has one of the following characteristics:
[0144] 1) The global CSI-RS resource set is a zero-power CSI-RS resource set.
[0145] 2) The time-frequency resource set occupied by the global CSI-RS resource set can be used for the UE or other UEs to send data signals or reference signals.
[0146] 3) The global CSI-RS resource set is a virtual resource set and does not occupy physical time / frequency / code resources.
[0147] FIG. 8 is a schematic diagram of the local CSI-RS resource set and the global CSI-RS resource set according to an embodiment of the present disclosure. As shown in FIG. 8, after the base station configures the local CSI-RS resource set and the CSI-RS resource set for the UE, it also indicates the mapping relationship between the global CSI-RS resource set and the local CSI-RS set to help the UE map the measurement results of the local CSI-RS resource set.
[0148] In addition, the base station can indicate in the reporting configuration that the UE uses the global CSI-RS resource set for reporting. For example, it can report the CRI and measurement results (such as RSRP, SINR, etc.) of the strongest CSI-RS resource in the global CSI-RS resource set. For example, in Embodiment 1 of the present disclosure, the base station can indicate that the CSI-RS resource set ID (nzp-CSI-ResourceSetID) when the UE reports is the global CSI-RS resource set, or the UE notifies the base station that the CSI-RS resource set ID is the global CSI-RS resource set when reporting.
[0149] After the configuration is completed, the base station can send CSI-RS reference signals to the UE according to the local CSI-RS resource set. The UE measures and obtains the local measurement results corresponding to the local CSI-RS resource set, and maps the local measurement results to global measurement results according to the mapping relationship indicated by the base station, and reports according to the global measurement results.
[0150] The mapping method for the mapping relationship can include, but is not limited to, linear mapping and nonlinear mapping. The specific mapping process can be as follows:
[0151] Method 1, Linear Mapping
[0152] Assuming that the measurement result of the i-th CSI-RS resource in the partial CSI-RS resource set is represented by x_i, and the measurement result of the i-th CSI-RS resource in the global CSI-RS resource set is represented by y_i, then the measurement results of the local CSI-RS resource set and the global CSI-RS resource set can be represented by column vectors x = [x1 x2 ... x...] M ] T And y = [y1 y2 ... y N ] T If we express that the linear mapping relationship between the two can be represented as:
[0153] Where C∈C^(M×N) represents the mapping matrix.
[0154] Method 2, Nonlinear Mapping
[0155] Figure 9 is a schematic diagram of nonlinear mapping according to an embodiment of the present disclosure. As shown in Figure 9, the measurement results of the M-dimensional local CSI-RS resource set can be input into a preset nonlinear mapping function to obtain the measurement results of the N-dimensional global CSI-RS resource set. The input dimension M of the nonlinear mapping function is less than the output dimension N, and M and N are both positive integers.
[0156] For example, M-dimensional local CSI-RS resource measurement results can be input into a pre-trained AI model (i.e., a preset AI model) to obtain N-dimensional global CSI-RS resource measurement results output by the AI model.
[0157] The scheme in this embodiment 1 significantly reduces the pilot overhead of CSI-RS. By configuring a smaller local CSI-RS resource set for users for measurement, and at the same time using the configured global CSI-RS resource set for efficient reporting, it not only improves the utilization efficiency of wireless resources, but also ensures that the base station can obtain comprehensive channel state information, thereby optimizing beam management and precoding, and improving communication quality and system performance.
[0158] Example 2: CSI-RS for CSI Acquisition
[0159] 1. Existing technical solutions
[0160] Figure 10 is a schematic diagram of antenna port mapping in related technologies. As shown in Figure 10, when CSI-RS is used for CSI acquisition, each CSI-RS resource is typically configured with multiple CSI-RS ports to measure the channel. Assuming there are N physical antenna ports on the base station side, in order to measure comprehensive channel state information, the base station sends CSI-RS reference signals for N CSI-RS ports, with each CSI-RS port being transmitted by one antenna port.
[0161] The UE measures the CSI-RS of each port to obtain the radio channel of each physical antenna port, and ultimately obtains the global channel. (N r (The number of receiving antennas) and calculate parameters such as PMI, CQI, and Rank Indication (RI) based on channel H and report them.
[0162] In existing technologies for CSI acquisition, the base station provides each UE with a CSI-RS port corresponding to all physical antenna ports. With the increasing number of antenna ports, this leads to a significant increase in CSI-RS signal transmission resources. The huge resource overhead not only compresses the resources available for data transmission, but also affects the overall network performance due to uneven resource allocation.
[0163] 2. The proposed solution
[0164] Figure 11 is a schematic diagram of a scheme for acquiring CSI based on local CSI-RS resources according to an embodiment of this disclosure. As shown in Figure 11, for CSI-RS used to acquire CSI, within the same CSI-RS resource set, the base station simultaneously configures two types of CSI-RS resources for the user. The first type of CSI-RS resource is local CSI-RS resource, which contains a total of M CSI-RS ports. The second type of CSI-RS resource is global CSI-RS resource, which contains a total of N CSI-RS ports (M and N are both positive integers). The local CSI-RS resources are used only for channel measurement and not for reporting; while the global CSI-RS resources are not used for channel measurement and are only used for reporting. The base station's configuration of CSI-RS can be as follows:
[0165] 1) The base station can configure multiple CSI-RS resources with different numbers of ports for the UE within the same CSI-RS resource set, including global CSI-RS resources and local CSI-RS resources. The base station configures and instructs the UE that the global CSI-RS resources are virtual resources and are not actually occupied.
[0166] 2) The base station can configure multiple CSI-RS resources with different numbers of ports for the UE within the same CSI-RS resource set. The base station can instruct the UE that local CSI-RS resources cannot be used for reporting (or instruct the global CSI-RS resources to be used for reporting).
[0167] After configuration is completed, the base station can indicate the mapping relationship between the UE's global CSI-RS resources and local CSI-RS resources through downlink signaling. This mapping relationship can be the same as the mapping method in Embodiment 1 above. However, in this Embodiment 2, the mapping relationship is the mapping between the CSI-RS port of the local CSI-RS resource and the CSI-RS port of the global CSI-RS resource, rather than the mapping between different CSI-RS resources in the CSI-RS resource set.
[0168] When the base station transmits CSI-RS, it can map the local CSI-RS resources of port M to N physical antenna ports according to the pre-configured mapping relationship between the CSI-RS ports of local CSI-RS resources and the CSI-RS ports of global CSI-RS resources, and then transmit the local CSI-RS resources. After the UE receives the local CSI-RS resources, it performs measurements to obtain the measurement results of the local CSI-RS resources. The UE can obtain the measurement results of local CSI-RS resources based on the mapping relationship indicated by the base station. Measurement results mapped to global CSI-RS resources The system calculates and reports PMI, CQI, RI, etc. based on the measurement results of global CSI-RS resources, and the CRI reported by the UE is the CRI of global CSI-RS resources.
[0169] In this embodiment 2, the local CSI-RS resources are used for actual channel measurements, while the global CSI-RS resources provide a reporting framework. Although they do not actually transmit signals, they guide the UE on how to report CSI information based on local measurement results. The UE only needs to measure the local CSI-RS resources of a smaller number of ports, significantly reducing the resource consumption of actual CSI-RS signals. Simultaneously, through mapping relationships, the UE can convert measurement results based on local resources into equivalent measurements of global resources for reporting. This ensures that the base station can analyze channel state information based on the CSI-RS resources of all antenna ports without sacrificing the comprehensiveness and accuracy of the channel state information. This not only improves the utilization efficiency of radio resources but also reduces the processing burden on the UE and lowers signaling overhead. For large-scale antenna systems, this achieves a dual optimization of resource conservation and information reporting quality, greatly improving the overall system performance and user experience.
[0170] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this disclosure.
[0171] Embodiments of this disclosure also provide a computer-readable storage medium storing a computer program configured to perform the steps in any of the above method embodiments when executed.
[0172] In one exemplary embodiment, the aforementioned computer-readable storage medium may include, but is not limited to, various media capable of storing computer programs, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard disk, magnetic disk, or optical disk.
[0173] Figure 12 is a structural block diagram of an electronic device according to an embodiment of the present disclosure. As shown in Figure 12, an embodiment of the present disclosure also provides an electronic device 120, including a memory 1201 and a processor 1202. The memory 1201 stores a computer program, and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.
[0174] In one exemplary embodiment, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor and the input / output device is connected to the processor.
[0175] Specific examples in this embodiment can be found in the examples described in the above embodiments and exemplary implementations, and will not be repeated here.
[0176] Embodiments of this disclosure also provide a computer program product, including a computer program that, when executed by a processor, implements the steps in any of the above method embodiments.
[0177] It is obvious to those skilled in the art that the modules or steps of this disclosure described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, this disclosure is not limited to any particular combination of hardware and software.
[0178] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the scope of protection of this disclosure.
Claims
1. A data transmission method, applied to a base station, comprising: Configuration for sending Channel State Information Reference Signal (CSI-RS) to the UE; the configuration includes resource configuration for a first type of CSI-RS, resource configuration for a second type of CSI-RS, and a first indication, wherein the first indication is used to instruct the UE to perform measurements based on the first type of CSI-RS and to instruct the UE to report the measurement results based on the second type of CSI-RS; The resources configured in the first type of CSI-RS are less than those configured in the second type of CSI-RS.
2. The method of claim 1, wherein, Also includes: Based on the resources configured in the first type of CSI-RS, the first type of CSI-RS is sent to the UE.
3. The method of claim 1, wherein, Also includes: Send a second indication to the UE indicating the mapping relationship between the first type of CSI-RS and the second type of CSI-RS.
4. The method according to claim 1, wherein, The resource configuration for the second type of CSI-RS is virtual resources.
5. The method according to claim 3, wherein, Both the resources of the first type of CSI-RS and the resources of the second type of CSI-RS are configured as CSI-RS resource sets, wherein the resources of the first type of CSI-RS are configured as local CSI-RS resource sets, and the resources of the second type of CSI-RS are configured as global CSI-RS resource sets.
6. The method according to claim 5, wherein, The global CSI-RS resource set is a zero-power CSI-RS resource set.
7. The method according to claim 5, wherein, The first indication is used to indicate at least one of the following: The UE is instructed to perform channel measurements based on the local CSI-RS resource set; The UE is instructed to report the measurement results based on the global CSI-RS resource set; The UE is instructed not to report the local CSI-RS resource set. Instruct the UE not to perform measurements on the global CSI-RS resource set.
8. The method according to claim 5, wherein, The CSI-RS resource set contains at least one CSI-RS resource, and the mapping relationship is the mapping relationship between the CSI-RS resources in the local CSI-RS resource set and the CSI-RS resources in the global CSI-RS resource set.
9. The method according to claim 3, wherein, Both the resources of the first type of CSI-RS and the resources of the second type of CSI-RS are configured as CSI-RS resources. The resources of the first type of CSI-RS are configured as local CSI-RS resources, and the resources of the second type of CSI-RS are configured as global CSI-RS resources. The global CSI-RS resources and the local CSI-RS resources are located in the same CSI-RS resource set.
10. The method according to claim 9, wherein, The first indication is used to indicate at least one of the following: The UE is instructed to perform channel measurements based on the local CSI-RS resources; The UE is instructed to report the measurement results based on the global CSI-RS resources; The UE is instructed not to report the local CSI-RS resources. Instruct the UE not to measure the global CSI-RS resources.
11. The method according to claim 9, wherein, Each CSI-RS resource within the same CSI-RS resource set includes at least one CSI-RS port; the mapping relationship is the mapping relationship between the CSI-RS ports of the local CSI-RS resources and the CSI-RS ports of the global CSI-RS resources.
12. The method according to claim 3, wherein, Sending a second indication to the UE, indicating the mapping relationship between the first type of CSI-RS and the second type of CSI-RS, includes: The second indication is sent to the UE via downlink signaling, wherein the downlink signaling includes at least one of the following: Radio Resource Control (RRC) signaling, Media Access Control Unit (MAC-CE) signaling, and Downlink Control Information (DCI) signaling.
13. The method according to claim 3, wherein, The mapping relationship includes at least one of the following: a preset mapping matrix, parameters of a preset AI model, a preset nonlinear mapping function, and a quasi-co-address QCL relationship.
14. The method according to claim 3, wherein, The mapping relationship includes a quasi-co-address (QCL) relationship. Instructing the UE on the mapping relationship between the first type of CSI-RS resources and the second type of CSI-RS resources includes: The Transmission Configuration Indication (TCI) indicates the QCL relationship to the UE; wherein the type of the QCL relationship includes at least one of the following: QCL-Type A, QCL-Type B, QCL-Type C, and QCL-Type D.
15. A data transmission method, applied to a UE, comprising: The configuration of receiving Channel State Information Reference Signal (CSI-RS) sent by the base station includes resource configuration of a first type of CSI-RS, resource configuration of a second type of CSI-RS, and a first indication, wherein the first indication is used to instruct the UE to perform measurements based on the first type of CSI-RS and to instruct the UE to report the measurement results based on the second type of CSI-RS. The resources configured in the first type of CSI-RS are less than those configured in the second type of CSI-RS.
16. The method according to claim 15, wherein, Also includes: Receive the first type of CSI-RS sent by the base station; Based on the first type of CSI-RS and the configuration, measurements are performed using the first type of CSI-RS, and the measurement results are reported to the base station using the second type of CSI-RS.
17. The method according to claim 16, wherein, The step of performing measurements based on the first type of CSI-RS and reporting the measurement results to the base station based on the second type of CSI-RS includes: Measurements are performed based on the first type of CSI-RS to obtain the measurement results of the first type of CSI-RS; Based on the mapping relationship between the first type of CSI-RS and the second type of CSI-RS, determine the measurement result of the second type of CSI-RS corresponding to the measurement result of the first type of CSI-RS; Based on the second type of CSI-RS, the measurement results of the second type of CSI-RS are reported to the base station.
18. The method according to claim 15, wherein, Also includes: The system receives a second indication of the mapping relationship between the first type of CSI-RS and the second type of CSI-RS sent by the base station.
19. The method according to claim 15, wherein, The resource configuration for the second type of CSI-RS is virtual resources.
20. The method according to claim 18, wherein, Both the resources of the first type of CSI-RS and the resources of the second type of CSI-RS are configured as CSI-RS resource sets, wherein the resources of the first type of CSI-RS are configured as local CSI-RS resource sets, and the resources of the second type of CSI-RS are configured as global CSI-RS resource sets.
21. The method according to claim 20, wherein, The global CSI-RS resource set is a zero-power CSI-RS resource set.
22. The method according to claim 20, wherein, The first indication is used to indicate at least one of the following: The UE is instructed to perform channel measurements based on the local CSI-RS resource set; The UE is instructed to report the measurement results based on the global CSI-RS resource set; The UE is instructed not to report the local CSI-RS resource set. Instruct the UE not to perform measurements on the global CSI-RS resource set.
23. The method according to claim 20, wherein, The CSI-RS resource set contains at least one CSI-RS resource, and the mapping relationship is the mapping relationship between the CSI-RS resources in the local CSI-RS resource set and the CSI-RS resources in the global CSI-RS resource set.
24. The method according to claim 18, wherein, Both the resources of the first type of CSI-RS and the resources of the second type of CSI-RS are configured as CSI-RS resources. The resources of the first type of CSI-RS are configured as local CSI-RS resources, and the resources of the second type of CSI-RS are configured as global CSI-RS resources. The global CSI-RS resources and the local CSI-RS resources are located in the same CSI-RS resource set.
25. The method according to claim 24, wherein, The first indication is used to indicate at least one of the following: The UE is instructed to perform channel measurements based on the local CSI-RS resources; The UE is instructed to report the measurement results based on the global CSI-RS resources; The UE is instructed not to report the local CSI-RS resources. Instruct the UE not to measure the global CSI-RS resources.
26. The method of claim 24, wherein, Each CSI-RS resource within the same CSI-RS resource set includes at least one CSI-RS port; the mapping relationship is the mapping relationship between the CSI-RS ports of the local CSI-RS resources and the CSI-RS ports of the global CSI-RS resources.
27. The method according to claim 18, wherein, The second indication is an indication sent by the base station via downlink signaling, wherein the downlink signaling includes at least one of the following: Radio Resource Control (RRC) signaling, Media Access Control Unit (MAC-CE) signaling, and Downlink Control Information (DCI) signaling.
28. The method according to claim 18, wherein, The mapping relationship includes at least one of the following: a preset mapping matrix, parameters of a preset AI model, a preset nonlinear mapping function, and a quasi-co-address QCL relationship.
29. The method according to claim 18, wherein, The mapping relationship includes a quasi-co-located QCL relationship, which is sent by the base station through the Transmission Configuration Instruction (TCI); wherein, the type of the QCL relationship includes at least one of the following: QCL-TypeA, QCL-TypeB, QCL-TypeC, and QCL-TypeD.
30. A base station for implementing the steps of the method according to any one of claims 1 to 14.
31. A user terminal, the user terminal being used to implement the steps of the method according to any one of claims 15 to 29.
32. A computer-readable storage medium storing a computer program, wherein, When the computer program is executed by a processor, it implements the steps of the method described in any one of claims 1-14, or the steps of the method described in any one of claims 15-29.
33. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method of any one of claims 1-14, or to implement the steps of the method of any one of claims 15-29.
34. A computer program product comprising a computer program that, when executed by a processor, implements the steps of the method described in any one of claims 1-14, or implements the steps of the method described in any one of claims 15-29.