A CSI-RS transmission method, apparatus and equipment

Abstract

This application provides a CSI-RS transmission method, apparatus, and device. The method includes: receiving resource configuration information corresponding to a CSI-RS resource set sent by a base station; wherein the resource configuration information is used to indicate the CSI-RS resource set, and the CSI-RS resource set includes CSI-RS resources located in an SBFD symbol; wherein the CSI-RS resources exceed the downlink subband range of the SBFD symbol, or the CSI-RS resources are located in the downlink subband of the SBFD symbol; receiving CSI-RS sent by the base station based on the CSI-RS resources in the CSI-RS resource set, measuring the received CSI-RS, and reporting the measurement results to the base station. This solution can improve resource utilization.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a CSI-RS transmission method, apparatus and equipment. Background Technology

[0002] TDD (Time Division Duplex) systems are widely used in mobile communication systems, such as 5G systems. In TDD systems, the frame structure is divided into DL (Downlink) slots, UL (Uplink) slots, and flexible slots.

[0003] A DL (Deep Link) time slot includes multiple DL symbols, and downlink data is processed on the frequency domain resources corresponding to these DL symbols. A UL (Upper Link) time slot includes multiple UL symbols, and uplink data is processed on the frequency domain resources corresponding to these UL symbols. A flexible time slot includes at least one F (Flexible) symbol. An F symbol can be used for DL ​​(downlink data processing on the frequency domain resources corresponding to the F symbol), for UL (uplink data processing on the frequency domain resources corresponding to the F symbol), and for GP (GuardPeriod) (protection during uplink / downlink handover on the frequency domain resources corresponding to the F symbol).

[0004] TDD systems can operate in HD (Half Duplex) mode, meaning that at any given time, the same frequency domain resources can only be used for UL or DL. Summary of the Invention

[0005] This application provides a CSI-RS transmission method applied to user equipment, including:

[0006] The receiver receives resource configuration information corresponding to a CSI-RS resource set sent by the base station. The resource configuration information is used to indicate the CSI-RS resource set, and the CSI-RS resource set includes CSI-RS resources located in the SBFD symbol. The CSI-RS resources are outside the downlink subband of the SBFD symbol, or the CSI-RS resources are located in the downlink subband of the SBFD symbol.

[0007] Based on the CSI-RS resources in the CSI-RS resource set, receive the CSI-RS sent by the base station.

[0008] This application provides a CSI-RS transmission method applied to a base station, including:

[0009] Send resource configuration information corresponding to the CSI-RS resource set to the user equipment. The resource configuration information is used to indicate the CSI-RS resource set used by the user equipment, and the CSI-RS resource set includes CSI-RS resources located in the SBFD symbol; the CSI-RS resources are outside the range of the downlink subband of the SBFD symbol, or the CSI-RS resources are located in the downlink subband of the SBFD symbol.

[0010] The user equipment sends a CSI-RS to the user equipment based on the CSI-RS resources in the CSI-RS resource set, so that the user equipment receives the CSI-RS based on the CSI-RS resources in the CSI-RS resource set.

[0011] This application provides a CSI-RS transmission device for use in user equipment, comprising:

[0012] The first receiving module is configured to receive resource configuration information corresponding to a CSI-RS resource set sent by the base station. The resource configuration information is used to indicate the CSI-RS resource set, and the CSI-RS resource set includes CSI-RS resources located in the SBFD symbol. The CSI-RS resources are outside the downlink subband of the SBFD symbol, or the CSI-RS resources are located in the downlink subband of the SBFD symbol.

[0013] The second receiving module is used to receive CSI-RS transmitted by the base station based on the CSI-RS resources in the CSI-RS resource set.

[0014] This application provides a CSI-RS transmission device for use in a base station, comprising:

[0015] The first transmitting module is configured to transmit resource configuration information corresponding to the CSI-RS resource set to the user equipment. The resource configuration information is used to indicate the CSI-RS resource set used by the user equipment, and the CSI-RS resource set includes CSI-RS resources located in the SBFD symbol. The CSI-RS resources are outside the downlink subband of the SBFD symbol, or the CSI-RS resources are located in the downlink subband of the SBFD symbol.

[0016] The second sending module is configured to send CSI-RS to the user equipment based on the CSI-RS resources in the CSI-RS resource set, so that the user equipment can receive CSI-RS based on the CSI-RS resources in the CSI-RS resource set.

[0017] This application provides a user equipment, including: a processor and a machine-readable storage medium, the machine-readable storage medium storing machine-executable instructions that can be executed by the processor; the processor is used to execute the machine-executable instructions to implement the CSI-RS transmission method of the example above.

[0018] This application provides a base station, including: a processor and a machine-readable storage medium, the machine-readable storage medium storing machine-executable instructions that can be executed by the processor; the processor is used to execute the machine-executable instructions to implement the CSI-RS transmission method of the above example.

[0019] As can be seen from the above technical solutions, the UE (User Equipment) receives CSI-RS using CSI-RS resources in the CSI-RS (Channel State Information Reference Signal) resource set, and the base station transmits CSI-RS using CSI-RS resources in the CSI-RS resource set. When SBFD (Sub-Band Full Duplex) time-frequency resources overlap with CSI-RS resources, SBFD time-frequency resources can be used for CSI-RS transmission, improving downlink data transmission reliability and cell coverage radius, reducing uplink and downlink interference caused by SBFD time-frequency resources, and enabling effective combination and implementation of SBFD time-frequency resource configuration and CSI-RS transmission mechanisms. From the perspective of the entire system, it can support CSI-RS transmission in TDD systems, improve resource utilization, increase network coverage and capacity, increase downlink transmission resources, and reduce downlink transmission latency and increase downlink transmission capacity. Attached Figure Description

[0020] Figure 1A and Figure 1B This is a flowchart illustrating the CSI-RS transmission method in an example.

[0021] Figure 2 This is a schematic diagram of the time-frequency resources of SBFD in an example;

[0022] Figure 3 This is a schematic diagram illustrating the configuration of CSI-RS resource sets using SBFD symbols and ordinary symbols in an example;

[0023] Figure 4 This is a schematic diagram illustrating the misalignment between the CSI subband and the UL subband in an example.

[0024] Figure 5 This is a schematic diagram illustrating the configuration of the CSI-RS resource set using the SBFD symbol in an example;

[0025] Figure 6A and Figure 6B This is a schematic diagram of a CSI-RS transmission device in an example;

[0026] Figure 7A This is a schematic diagram of the structure of a user device in an example;

[0027] Figure 7B This is a schematic diagram of the structure of a base station in an example. Detailed Implementation

[0028] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The singular forms “a,” “the,” and “the” as used in this application and claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to any and all possible combinations comprising one or more of the associated listed items.

[0029] It should be understood that although the terms first, second, third, etc., may be used to describe various information in embodiments of this application, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" may also be interpreted as "when," "when," or "in response to a determination."

[0030] TDD systems can operate in HD mode, meaning that at any given time, the same frequency domain resources can only be used for UL or DL. To make more flexible use of frequency domain resources and improve resource utilization, TDD systems can also operate in FD (Full-Duplex) mode, meaning that at the same time, the same frequency domain resources can be used for both UL and DL simultaneously, that is, uplink and downlink data can be processed on the same frequency domain resources at the same time.

[0031] In TDD systems, the frame structure is divided into DL (Deep Node) time slots, UL (Ultra Node) time slots, and flexible time slots. Once the frame structure is determined, the UE can transmit and receive data according to the frame structure. For UEs using HD (Half Duplex) mode, the base station (such as gNB) schedules the UE to transmit or receive based on the frame structure. For UEs using FD (Fixed Node) mode, the base station schedules the UE to transmit, receive, or transmit and receive simultaneously based on the frame structure. In summary, the base station can configure the frame structure and notify the UE of the frame structure so that the UE is aware of the frame structure and can correctly transmit and receive data. From another perspective, after the UE knows the frame structure, it can be aware of potential inter-UE interference and thus adopt interference cancellation techniques to mitigate interference and improve communication reliability.

[0032] In one example, under a TDD system, for a frame structure that is mainly for uplink transmission, there are usually more UL time slots configured, which results in fewer DL time slots. This leads to a limitation on the downlink transmission rate and an increase in the transmission latency of downlink data, resulting in greater downlink transmission latency and making downlink services unusable.

[0033] In one example of this application, a CSI-RS transmission method is proposed. This method configures flexible downlink and uplink frequency domain resources for the UE using SBFD time-frequency resources. Uplink data can be transmitted using uplink frequency domain resources; that is, uplink frequency domain resources can be configured using downlink time slots or flexible time slots, and uplink data can be transmitted through these resources, thereby improving the uplink transmission rate and reducing uplink data transmission latency. Furthermore, downlink frequency domain resources can also be configured using uplink time slots or flexible time slots, and downlink data can be transmitted through these resources, thereby improving the downlink transmission rate and reducing downlink data transmission latency.

[0034] This application provides an example of a CSI-RS transmission method, which can be applied to user equipment. See [link to relevant documentation]. Figure 1A The diagram shown is a flowchart of the CSI-RS transmission method, which may include:

[0035] Step 111: Receive resource configuration information corresponding to the CSI-RS resource set sent by the base station; wherein, the resource configuration information is used to indicate the CSI-RS resource set, and the CSI-RS resource set includes CSI-RS resources located in the SBFD symbol; wherein, the CSI-RS resources may extend beyond the downlink subband of the SBFD symbol, or, the CSI-RS resources may be located in the downlink subband of the SBFD symbol.

[0036] Step 112: Receive CSI-RS sent by the base station based on the CSI-RS resources in the CSI-RS resource set.

[0037] This application presents an example of a CSI-RS transmission method, which can be applied to a base station; see [link to relevant documentation]. Figure 1B The diagram shown is a flowchart of the CSI-RS transmission method, which may include:

[0038] Step 121: Send resource configuration information corresponding to the CSI-RS resource set to the user equipment. The resource configuration information is used to indicate the CSI-RS resource set used by the user equipment, and the CSI-RS resource set includes CSI-RS resources located in the SBFD symbol; wherein, the CSI-RS resource is outside the range of the downlink subband of the SBFD symbol, or the CSI-RS resource is located in the downlink subband of the SBFD symbol.

[0039] Step 122: Send CSI-RS to the user equipment based on the CSI-RS resources in the CSI-RS resource set, so that the user equipment can receive CSI-RS based on the CSI-RS resources in the CSI-RS resource set.

[0040] In one example, CSI-RS resources are CSI-RS time-frequency resources; the following examples will also use CSI-RS resources.

[0041] In one example, if a user equipment (UE) corresponds to a first CSI-RS resource set, the base station sends first resource configuration information corresponding to the first CSI-RS resource set to the UE. This first resource configuration information indicates the first CSI-RS resource set. The first CSI-RS resource set may include first-type CSI-RS resources located in ordinary symbols and second-type CSI-RS resources located in SBFD symbols, wherein the second-type CSI-RS resources extend beyond the downlink subband of the SBFD symbol. The second-type CSI-RS resources extending beyond the downlink subband of the SBFD symbol means that they include a first portion of resources in the downlink subband of the SBFD symbol and a second portion of resources in the uplink subband or guard subband of the SBFD symbol.

[0042] In one example, if a user equipment (UE) corresponds to a second CSI-RS resource set and a third CSI-RS resource set, the base station sends the UE second resource configuration information corresponding to the second CSI-RS resource set and third resource configuration information corresponding to the third CSI-RS resource set. The second resource configuration information indicates the second CSI-RS resource set, and the third resource configuration information indicates the third CSI-RS resource set. The second CSI-RS resource set includes third-type CSI-RS resources located in SBFD symbols. These third-type CSI-RS resources are located in the downlink subband of the SBFD symbols, meaning they do not exceed the range of the downlink subband of the SBFD symbols. The third CSI-RS resource set includes fourth-type CSI-RS resources located in ordinary symbols.

[0043] In one example, if the second type of CSI-RS resource includes a first portion of resources in the downlink subband of the SBFD symbol and a second portion of resources in the uplink subband or guard subband of the SBFD symbol, then: if downlink data transmission outside the downlink subband of the SBFD symbol is permitted, the base station sends CSI-RS to the user equipment based on the first and second portions of the second type of CSI-RS resource. The user equipment receives the CSI-RS sent by the base station based on the first and second portions of the second type of CSI-RS resource. Alternatively,

[0044] If downlink data transmission outside the downlink subband of the SBFD symbol is not permitted, the base station prohibits the transmission of CSI-RS to the user equipment based on the first and second portions of the Type II CSI-RS resources. The user equipment prohibits the reception of CSI-RS transmitted by the base station based on the first and second portions of the Type II CSI-RS resources. Alternatively, the base station transmits CSI-RS based on the first portion of the Type II CSI-RS resources and prohibits the transmission of CSI-RS based on the second portion of the Type II CSI-RS resources. The user equipment receives CSI-RS based on the first portion of the Type II CSI-RS resources and prohibits the reception of CSI-RS based on the second portion of the Type II CSI-RS resources.

[0045] In one example, after the user equipment receives CSI-RS based on the first part of the second type of CSI-RS resources and prohibits the reception of CSI-RS based on the second part of the second type of CSI-RS resources, it can still measure the CSI-RS received on the first part of the second type of CSI-RS resources to obtain the first channel state information and send the first channel state information to the base station.

[0046] In one example, after the user equipment prohibits receiving CSI-RS based on the first and second part of the second type of CSI-RS resources, it can still perform measurements based on CSI-RS that do not overlap with the uplink subband or guard subband in the previous period, determine the measurement results as the channel state information for the current period, and send the channel state information to the base station.

[0047] In one example, after receiving CSI-RS from the base station based on the first type of CSI-RS resources in the first CSI-RS resource set, the user equipment can also measure the CSI-RS received from the first type of CSI-RS resources to obtain second channel state information, and then send the second channel state information to the base station.

[0048] The process of sending the first channel state information to the base station and sending the second channel state information to the base station includes: if the first channel state information includes multiple first L1-RSRPs and the second channel state information includes multiple second L1-RSRPs, then N first L1-RSRPs are selected from the multiple first L1-RSRPs, and N second L1-RSRPs are selected from the multiple second L1-RSRPs, and the N first L1-RSRPs and N second L1-RSRPs are sent to the base station; or, 2N L1-RSRPs are selected from the multiple first L1-RSRPs and multiple second L1-RSRPs, and the 2N L1-RSRPs are sent to the base station. And / or,

[0049] If the first channel state information includes multiple first L1-SINRs and the second channel state information includes multiple second L1-SINRs, then N first L1-SINRs are selected from the multiple first L1-SINRs, and N second L1-SINRs are selected from the multiple second L1-SINRs, and the N first L1-SINRs and N second L1-SINRs are sent to the base station; or, 2N L1-SINRs are selected from the multiple first L1-SINRs and multiple second L1-SINRs, and the 2N L1-SINRs are sent to the base station.

[0050] In one example, the user equipment measures the CSI-RS received from the first part of the second type of CSI-RS resource to obtain the first channel state information. This may include: if the first part of the second type of CSI-RS resource corresponds to at least one CSI subband, for each CSI subband, if the CSI subband completely overlaps with the uplink subband or guard subband of the SBFD symbol, then the measurement of the CSI-RS received from the CSI subband is prohibited.

[0051] If the CSI subband does not overlap with the uplink subband or guard subband of the SBFD symbol, the CSI-RS received by the CSI subband is measured to obtain the measurement result of the CSI subband.

[0052] If the CSI subband partially overlaps with the uplink subband or guard subband of the SBFD symbol, then measurement of the CSI-RS received by the CSI subband is prohibited; or, the determination of whether to measure the CSI-RS received by the CSI subband is based on the size of the non-overlapping resources of the CSI subband. If yes, the CSI-RS received by the CSI subband is measured to obtain the measurement result of the CSI subband; if no, measurement of the CSI-RS received by the CSI subband is prohibited.

[0053] The first channel state information is determined based on the measurement results of each CSI sub-band.

[0054] In one example, the base station can send a first indication message to the user equipment, which then receives the first indication message. The first indication message is used to indicate that CSI-RS transmission based on the first and second portions of the second type of CSI-RS resources is prohibited, or to indicate that CSI-RS transmission based on the first portion of the second type of CSI-RS resources is prohibited, while prohibiting CSI-RS transmission based on the second portion of the second type of CSI-RS resources.

[0055] If the first indication information is used to indicate the transmission of CSI-RS based on the first portion of the second type of CSI-RS resources and to prohibit the transmission of CSI-RS based on the second portion of the second type of CSI-RS resources, the base station may also send a second indication information to the user equipment, which will then receive the second indication information. Specifically, the second indication information is used to indicate that measurement of CSI-RS received on a CSI subband that overlaps with the uplink subband or guard subband is prohibited, or it is used to indicate whether to measure CSI-RS received on a CSI subband based on the size of the non-overlapping resources of the CSI subband.

[0056] In one example, after the user equipment receives the CSI-RS transmitted by the base station based on the first type of CSI-RS resource, it can also measure the CSI-RS received by the first type of CSI-RS resource to obtain the second channel state information, and send the second channel state information to the base station; wherein the first channel state information and the second channel state information are sent to the base station through different uplink resources; or, the first channel state information and the second channel state information are sent to the base station through the same uplink resource.

[0057] In one example, for base stations and user equipment, the third type of CSI-RS resources only include resources in the downlink subband located in the SBFD symbol; wherein: if the third type of CSI-RS resources only occupy continuous resources in the downlink subband, then the second resource configuration information includes the RB start position and the number of RBs occupied corresponding to the continuous resources; if the third type of CSI-RS resources occupy two non-contiguous resources in the downlink subband, then the second resource configuration information includes the RB start position and the number of RBs occupied corresponding to the two resources respectively.

[0058] Among them, the starting position of the RB corresponding to the third type of CSI-RS resource can be an integer multiple of the first value (such as 4), and the number of RBs occupied corresponding to the third type of CSI-RS resource can be greater than or equal to the second value (such as 24), and the number of RBs occupied corresponding to the third type of CSI-RS resource can be an integer multiple of the first value.

[0059] Alternatively, the starting position of the RB corresponding to the third type of CSI-RS resource is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resource is any value.

[0060] Wherein, if the user equipment's capability parameters indicate that it has the capability to support arbitrary RB start positions, then the RB start position corresponding to the third type of CSI-RS resource is the start position of the downlink subband of the SBFD symbol, and the number of RBs occupied corresponding to the third type of CSI-RS resource is any value; if the user equipment's capability parameters indicate that it does not have the capability to support arbitrary RB start positions, then the RB start position corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is an integer multiple of the first value.

[0061] In one example, the base station can send third indication information to the user equipment, which is then received by the user equipment. This third indication information indicates whether transmission of downlink data outside the downlink subband of the SBFD symbol is permitted, or whether transmission of downlink data outside the downlink subband of the SBFD symbol is not permitted.

[0062] And / or, the base station may send a fourth indication message to the user equipment, which is then received by the user equipment. The fourth indication message is used to indicate whether uplink data transmission outside the uplink subband of the SBFD symbol is permitted, or to indicate whether uplink data transmission outside the uplink subband of the SBFD symbol is not permitted.

[0063] The base station transmits CSI-RS based on the first part of the second type of CSI-RS resources and prohibits the transmission of CSI-RS based on the second part of the second type of CSI-RS resources. This can include: determining the target transmission power based on the maximum transmission power of the second type of CSI-RS resources; or, determining the target transmission power based on the maximum transmission power of the second type of CSI-RS resources and the resource ratio, where the resource ratio is the ratio of the first part of the resources to the second type of CSI-RS resources; and transmitting CSI-RS based on the first part of the resources at the target transmission power.

[0064] As can be seen from the above technical solutions, the UE uses CSI-RS resources in the CSI-RS resource set to receive CSI-RS, and the base station uses CSI-RS resources in the CSI-RS resource set to transmit CSI-RS. When SBFD time-frequency resources overlap with CSI-RS resources, SBFD time-frequency resources are used for CSI-RS transmission, improving downlink data transmission reliability and cell coverage radius, reducing uplink and downlink interference caused by SBFD time-frequency resources, and enabling effective combination and implementation of SBFD time-frequency resource configuration and CSI-RS transmission mechanism. From the perspective of the entire system, it can support CSI-RS transmission in TDD systems, improve resource utilization, increase network coverage and network capacity, increase downlink transmission resources, reduce downlink transmission latency, and increase downlink transmission capacity.

[0065] The above technical solutions of this application will be explained below with examples.

[0066] In a TDD system, the frame structure can be divided into UL time slots, DL time slots, and flexible time slots. Symbols in the flexible time slots can be configured as UL symbols, DL symbols, and F symbols. F symbols can be used for UL, DL, or GP. Uplink data can be transmitted in UL time slots, using UL symbols or F symbols in flexible time slots, but not in DL time slots or using DL symbols in flexible time slots. Similarly, downlink data can be transmitted in DL time slots, using DL symbols or F symbols in flexible time slots, but not in UL time slots or using UL symbols in flexible time slots.

[0067] Full-duplex communication can be achieved using SBFD (Single-Segment Frequency Deployment), which allows SBFD time-frequency resources to be configured in time-frequency resources (such as UL, DL, and flexible time slots). This enables the transmission of data in a different direction from other time-frequency resources simultaneously on that SBFD time-frequency resource. For example, configuring SBFD time-frequency resources in a DL time slot allows uplink data to be transmitted within that DL time slot. Similarly, configuring SBFD time-frequency resources in a DL symbol of a flexible time slot allows uplink data to be transmitted within that DL symbol. Likewise, configuring SBFD time-frequency resources in a UL time slot allows downlink data to be transmitted within that UL time slot. Finally, configuring SBFD time-frequency resources in a UL symbol of a flexible time slot allows downlink data to be transmitted within that UL symbol.

[0068] In one example, SBFD time-frequency resources (SBFD time-frequency resources can also be called Subband time-frequency resources) can be time-frequency resources in SBFD time slots or time-frequency resources in SBFD symbols. SBFD symbols can be defined as symbols on which the base station and UE can be configured with SBFD subbands. On the SBFD subbands of these SBFD symbols (called SBFD time-frequency resources), the base station and UE can perform full-duplex communication. That is to say, on SBFD time-frequency resources, uplink transmission, downlink transmission, or simultaneous uplink and downlink transmission can be performed.

[0069] In this context, SBFD time-frequency resources can be explicitly designated as uplink, downlink, or Flexible. When an SBFD time-frequency resource is designated as Flexible, uplink or downlink can be flexibly scheduled within that resource. If the SBFD time-frequency resource is not explicitly designated, it means it is Flexible and can be used to transmit either uplink or downlink data. The configuration of SBFD symbols can include: which symbols in the DL, UL, and F time slots are used for SBFD transmission, as well as the implementation period and start point. For ease of description, in subsequent embodiments, the SBFD time-frequency resource will be used as an example corresponding to the SBFD time slot.

[0070] In one example, an SBFD indicating uplink is called UL-SBFD, meaning the SBFD time-frequency resources are used for uplink; an SBFD indicating downlink is called DL-SBFD, meaning the SBFD time-frequency resources are used for downlink. To support FD communication, SBFD time-frequency resources can be configured semi-statically, such as through RRC (Radio Resource Control) signaling, or dynamically, such as through DCI (Downlink Control Information).

[0071] SBFD time-frequency resources can be configured in DL symbols, F symbols, and UL symbols. Symbols configured with SBFD time-frequency resources are called SBFD symbols, and the remaining symbols without SBFD time-frequency resources are called ordinary symbols. In other words, non-SBFD symbols are called ordinary symbols, such as UL symbols, DL symbols, and F symbols. SBFD can be configured in only some symbols of a time slot; that is, some symbols in a time slot are SBFD symbols, and the rest are ordinary symbols, allowing the transmission of DL or UL data to span across ordinary symbols or SBFD symbols. Specifically, time slots configured with SBFD time-frequency resources (such as UL time slots, DL time slots, and flexible time slots) can be called SBFD time slots, and symbols configured with SBFD time-frequency resources can be called SBFD symbols.

[0072] In one example, CSI-RS is a reference signal used for time / frequency tracking, CSI (Channel State Information) calculation, L1-RSRP (Reference Signal Receiving Power) calculation, L1-SINR (Signal Interference Noise Ratio) calculation, and mobility management. MIMO (Multiple Input Multiple Output) and beamforming technologies are all based on CSI-RS.

[0073] CSI is a collective term for information reflecting channel status obtained by the UE based on CSI-RS measurements. It may include, but is not limited to, CQI (Channel Quality Indicator), PMI (Precoder Matrix Indicator), LI (Layer Indicator), RI (Rank Indicator), L1-RSRP, and L1-SINR. The base station can select appropriate scheduling strategies and transmission methods based on the CSI feedback from the UE to improve the overall performance of the communication system.

[0074] CSI-RS is used for time / frequency tracking, CSI measurement, beamforming and management, interference measurement, mobility management, and other functions. Parameters are configured via higher-layer signaling. For CSI-RS used for time / frequency tracking, in FR1, the main characteristics of CSI-RS are as follows: it is an NZP-CSI-RS-ResourceSet consisting of four periodic nzp-CSI-RS (Non-Zero Power CSI-RS) resources, and this resource set is configured with the parameter trs-Info. These four CSI-RS resources are distributed across two consecutive slots, with two CSI-RS resources mapped within each slot, and the time-domain interval is a fixed four symbols (l∈{4,8}, l∈{5,9}, or l∈{6,10} for frequency range 1). Each CSI-RS resource consists of one port and has a frequency domain density of 3, meaning that one RB (Resource Block) occupies 3 REs (Resource Elements). The bandwidth is min{52, BWP size} or equal to the size of the BWP (Bandwidth Part).

[0075] In FR2, the main characteristics of CSI-RS are as follows: An NZP-CSI-RS-ResourceSet consists of two periodic nzp-CSI-RS resources distributed within one consecutive time slot, or four periodic nzp-CSI-RS resources distributed within two consecutive time slots. Each time slot maps two CSI-RS resources, and the time-domain interval is a fixed four symbols (l∈{0,4}, l∈{1,5}, or l∈{2,6}, l∈{3,7}, l∈{7,11}, l∈{8,12}, or l∈{9,13} for frequency range 2). Each CSI-RS resource is one port with a frequency-domain density of 3. The bandwidth is min{52, BWP size} or equal to the BWP size.

[0076] For CSI-RS resources used for CSI measurements, beamforming and management, mobility management, and interference measurements, their main characteristics are as follows: In the time domain, they can be configured to use a maximum of 4 symbols, with arbitrary positions within a time slot. They can be configured as periodic, aperiodic, or semi-persistent. For aperiodic and semi-persistent CSI-RS, activation is achieved through MAC CE or DCI. In the frequency domain, they occupy a minimum of 24 PRBs (Physical Resource Blocks) and a maximum of BWP size. Their frequency density can be configured to values ​​of 0.5, 1, or 3. The number of ports per CSI-RS resource is configured to 1, 2, 4, 8, 16, or 32 depending on the application.

[0077] For CSI-RS resources used for functions such as CSI measurement, beam refinement and management, mobility management, and interference measurement, the UE will measure the CSI-RS, obtain the CSI results, and report the CSI results to the base station in the UCI for overall scheduling. Each CSI report corresponds to a specific CSI-RS resource. The content of the CSI report may include, but is not limited to: CSI-RS resource indication, rank indication, layer indication, CQI, PMI, L1-RSRP, L1-SINR, etc. The content of each report varies depending on the purpose and higher-layer signaling configuration. The type of CSI report can be configured as periodic, aperiodic, or semi-persistent. Aperiodic and semi-persistent CSI reporting can be triggered by the DCI.

[0078] In one example, the base station sends CSI-RS to the UE, and the UE sends CSI to the base station. Regarding the transmission process of CSI-RS and CSI, in TDD full-duplex mode, a CSI-RS resource scheduling method and a CSI reporting method are proposed. When transmitting CSI-RS using SBFD time-frequency resources, the overlap between CSI-RS resources and the UL Subband (uplink subband) is considered, and an appropriate transmission strategy is selected to transmit CSI-RS in the corresponding time-frequency resources. Since different types of CSI-RS resources have different configurations, different transmission strategies can be selected for different types of CSI-RS resources, and corresponding CSI reporting methods are provided for different transmission strategies. By providing a CSI reporting method for SBFD time-frequency resources to adapt to the CSI-RS transmission strategy, a power control method for CSI-RS in SBFD time-frequency resources is also provided. By specifying the CSI-RS transmission strategy, CSI reporting method, and CSI-RS power control method in SBFD time-frequency resources, uplink and downlink transmission can be achieved more efficiently using SBFD time-frequency resources, improving the overall performance of the communication system.

[0079] First, data transmission control for SBFD symbols.

[0080] For half-duplex UEs that support SBFD, the UE can learn about the configuration of SBFD time and frequency resources. However, the UE can only receive DL data or send UL data at the same time (symbol).

[0081] The base station configures SBFD time-frequency resources for half-duplex UEs that support SBFD functionality. SBFD time-frequency resources are configured for the UE in the DL timeslot or DL ​​symbol, and these resources are used to transmit UL data; that is, the SBFD time-frequency resources are the UL Subband (uplink subband). The DL symbol configured with SBFD time-frequency resources is called the SBFD symbol, and in addition to the UL Subband, the SBFD symbol contains the DL Subband (downlink subband) and a guard band, also known as the guard subband, which is located between the UL Subband and the DL Subband.

[0082] Configure SBFD time-frequency resources for the UE in the UL time slot or UL symbol, and use the SBFD time-frequency resources to transmit DL data. That is, the SBFD time-frequency resources are DL Subbands. The UL symbol configured with SBFD time-frequency resources is an SBFD symbol, and the SBFD symbol contains the UL Subband and guard bandwidth in addition to the DL Subband. Configure SBFD time-frequency resources for the UE in the F symbol, and use the SBFD time-frequency resources to transmit DL data (or UL data). That is, the SBFD time-frequency resources are DL Subbands (or UL Subbands). The F symbol configured with SBFD time-frequency resources is an SBFD symbol, and the SBFD symbol contains the UL Subband and guard bandwidth (or DL ​​Subband and guard bandwidth in addition to the DL Subband (or UL Subband)).

[0083] See Figure 2 The diagram shows the SBFD time-frequency resources. The base station configures SBFD time-frequency resources for the UE in the DL time slot or DL ​​symbol. The SBFD time-frequency resources are UL Subband, and the DL Subband is outside of UL Subband. The black part between UL Subband and DL Subband is the guard bandwidth.

[0084] Base stations can configure SBFD time and frequency resources semi-statically or dynamically. For example, they can configure SBFD time and frequency resources semi-statically through TDD-UL-DL-ConfigCommon signaling (TDD uplink and downlink shared configuration) or TDD-UL-DL-ConfigDedicated signaling (TDD uplink and downlink dedicated configuration), or dynamically through DCI.

[0085] For half-duplex UEs that do not support SBFD, since the configuration related to SBFD time and frequency resources cannot be known, even if the DL time slot or DL ​​symbol is configured with SBFD time and frequency resources (UL Subband), the UE can still receive CSI-RS normally on SBFD time and frequency resources (UL Subband).

[0086] For half-duplex UEs supporting SBFD, since the UE can access the configuration related to SBFD time-frequency resources, to ensure the UE can properly receive CSI-RS on SBFD time-frequency resources, it's necessary to determine whether DL data can be transmitted outside the DL Subband (SBFD time-frequency resources serve as the DL Subband). Specifically, it's necessary to determine whether DL data can be transmitted in the UL Subband or the guard band. For example, DL data transmission outside the DL Subband is not allowed, meaning DL data is only transmitted within the DL Subband. Alternatively, DL data transmission outside the DL Subband is allowed, meaning DL data can be transmitted in the UL Subband and / or the guard band.

[0087] The choice of which scheme to use can be indicated by a single indicator bit. For example, the base station can send a third indication information (such as a 1-bit indication bit) to the UE. This third indication information indicates whether DL data transmission outside the DL Subband of the SBFD symbol is permitted, or whether it indicates that DL data transmission outside the DL Subband of the SBFD symbol is not permitted. For instance, when configuring SBFD time-frequency resources (i.e., DL Subband), the base station can introduce an additional parameter: `dlReceptionOutDlSubband ENUMERATED{enabled},Optional`. This parameter is optional. If it is not configured, the second scheme is used by default, meaning DL data transmission outside the DL Subband is not permitted. If it is configured, the first scheme is used, meaning DL data transmission outside the DL Subband is permitted.

[0088] For half-duplex UEs supporting SBFD, since the UE can access the configuration related to SBFD time-frequency resources, to ensure the UE can properly receive CSI-RS on SBFD time-frequency resources, it's necessary to clarify whether UL data can be transmitted outside the UL Subband (SBFD time-frequency resources serve as the UL Subband). Specifically, it's necessary to clarify whether UL data can be transmitted in the DL Subband or the guard band. For example, UL data transmission outside the UL Subband may be prohibited, meaning UL data is only transmitted within the UL Subband. Alternatively, UL data transmission outside the UL Subband may be permitted, meaning UL data can be transmitted in the DL Subband and / or the guard band.

[0089] The choice of which scheme to use can be indicated by a single indicator bit. For example, the base station can send a fourth indication message (such as a 1-bit indication bit) to the UE. This fourth indication message indicates whether UL data transmission outside the UL Subband of the SBFD symbol is permitted, or whether it indicates that UL data transmission outside the UL Subband of the SBFD symbol is not permitted. For instance, when configuring SBFD time-frequency resources (i.e., the UL Subband), the base station can introduce an additional parameter: ulTransmissionOutUlSubband ENUMERATED{enabled},Optional. This parameter is optional. If this parameter is not configured, the second scheme is used, meaning UL data transmission outside the UL Subband is not permitted. If this parameter is configured, the first scheme is used, meaning UL data transmission outside the UL Subband is permitted.

[0090] Regardless of whether the first or second scheme is used, for a half-duplex UE that supports SBFD, it can only receive DL data or send UL data in the same symbol. When DL data reception and UL data transmission exist simultaneously in the same symbol, the UE needs to specify the conflict resolution method at this time. See the following embodiments. The UE in the following embodiments refers to a half-duplex UE that supports SBFD.

[0091] Second, CSI-RS resource configuration.

[0092] For the same UE, when CSI-RS and UL data exist at the same time, it is necessary to compare the priorities of CSI-RS and UL data. If the priority of CSI-RS is higher than that of UL data, the UE will receive CSI-RS. If the priority of CSI-RS is lower than that of UL data, the UE will give up receiving CSI-RS.

[0093] For example, for dynamically scheduled UL data transmission, such as PUSCH (Physical Uplink Shared Channel), the base station should avoid dynamically scheduling PUSCH on symbols where CSI-RS exists. If dynamic scheduling of PUSCH is necessary, the priority of PUSCH is higher than that of CSI-RS, therefore, the UE will not receive CSI-RS. For semi-statically scheduled PUSCH, the priority of PUSCH is higher than that of CSI-RS, therefore, the UE will not receive CSI-RS.

[0094] When SRS and CSI-RS conflict at the same time, the priority must be determined based on their types: Aperiodic has higher priority than Semi-persistent, and Semi-persistent has higher priority than Periodic. For example, an Aperiodic SRS has higher priority than a Periodic or Semi-persistent CSI-RS, and an Aperiodic CSI-RS has higher priority than a Periodic or Semi-persistent SRS. For the same type, the UE does not expect the base station to simultaneously activate Semi-persistent and / or Aperiodic CSI-RS and SRS in the same symbol. For Periodic CSI-RS and SRS, CSI-RS has higher priority.

[0095] In one example, if the priority of CSI-RS is higher than that of UL data, then by default, when the UE receives CSI-RS, conflict resolution for CSI-RS has already been performed, and the UE can receive CSI-RS correctly.

[0096] In one example, when configuring CSI-RS resources in an SBFD symbol, a unified configuration method and / or a separate configuration method for CSI-RS resources can be used. The unified configuration method and the separate configuration method for CSI-RS resources are explained below.

[0097] Regarding the unified configuration method for CSI-RS resources, the CSI-RS resources in SBFD symbols and the CSI-RS resources in ordinary symbols (i.e., non-SBFD symbols) share the same configuration. That is, the configuration of CSI-RS resources in SBFD symbols and CSI-RS resources in ordinary symbols is distributed through the same resource configuration information.

[0098] For the separate configuration method of CSI-RS resources, the CSI-RS resources in SBFD symbols and the CSI-RS resources in ordinary symbols use different configurations. That is, the configuration of CSI-RS resources in SBFD symbols is issued through one resource configuration information, and the configuration of CSI-RS resources in ordinary symbols is issued through another resource configuration information.

[0099] Clearly, in the separate configuration method, CSI-RS resources can be configured separately for the UE in the SBFD symbol, and the CSI-RS resources can be configured according to the SBFD time and frequency resources.

[0100] In one example, a unified configuration of CSI-RS resources or a separate configuration of CSI-RS resources can be used, and both methods can coexist. For instance, if the base station does not consider the configuration of SBFD time-frequency resources and only configures one set of CSI-RS resources, then the transmission mechanism when the unified CSI-RS and UL Subband overlap needs to be addressed. If the base station considers the configuration of SBFD time-frequency resources and configures one set of CSI-RS resources in the DL Subband, then this configuration can coexist with the unified CSI-RS resource configuration.

[0101] Third, unified configuration of CSI-RS resources and CSI reporting.

[0102] Under the unified configuration method of CSI-RS resources, CSI-RS resources in SBFD symbols and CSI-RS resources in ordinary symbols share the same configuration. As a result, CSI-RS resources in the CSI-RS resource set may span ordinary symbols and SBFD symbols in the same time slot, or different CSI-RS resources in the CSI-RS resource set may be in ordinary symbols or SBFD symbols, or CSI-RS resources in the CSI-RS resource set may be in ordinary symbols or SBFD symbols in different periods. This can lead to situations where CSI-RS resources overlap with UL Subband or protection bandwidth.

[0103] See Figure 3 The diagram shows the configuration of CSI-RS resource sets (denoted as the first CSI-RS resource set) for SBFD symbols and ordinary symbols. The first CSI-RS resource set may include first-class CSI-RS resources (such as CSI-RS0) located in ordinary symbols, and second-class CSI-RS resources (such as CSI-RS1) located in SBFD symbols. The second-class CSI-RS resources exceed the range of the DL Subband of the SBFD symbol, that is, the second-class CSI-RS resources overlap with the UL Subband or the protection bandwidth.

[0104] The base station can allocate a first CSI-RS resource set to the UE, and the first CSI-RS resource set may include at least one first type of CSI-RS resource and / or at least one second type of CSI-RS resource.

[0105] The base station sends first resource configuration information corresponding to a first CSI-RS resource set to the UE. After receiving the first resource configuration information, the UE determines the first CSI-RS resource set based on the first resource configuration information. The first resource configuration information can be dynamic or semi-static. The base station can send CSI-RS to the UE based on the first type of CSI-RS resources and / or the second type of CSI-RS resources in the first CSI-RS resource set, and the UE can receive CSI-RS based on the first type of CSI-RS resources and / or the second type of CSI-RS resources in the first CSI-RS resource set. The UE can also measure the received CSI-RS to obtain CSI and send the CSI to the base station.

[0106] In one example, for each first type of CSI-RS resource in the first CSI-RS resource set, since the first type of CSI-RS resource is located in a normal symbol, the base station can send CSI-RS to the UE based on the first type of CSI-RS resource. The UE can receive CSI-RS based on the first type of CSI-RS resource, measure the CSI-RS received from the first type of CSI-RS resource, obtain the CSI, and subsequently record the CSI as the second channel state information and send the second channel state information to the base station.

[0107] In one example, for each second-class CSI-RS resource in the first CSI-RS resource set, the second-class CSI-RS resource is located in an SBFD symbol, and the second-class CSI-RS resource includes a first portion of the resource in the DL Subband located in the SBFD symbol, and a second portion of the resource in the UL Subband or guard subband located in the SBFD symbol, based on this:

[0108] If downlink data transmission is permitted outside the DL Subband of the SBFD symbol, the base station sends CSI-RS to the UE based on the first and second part resources. The UE receives the CSI-RS based on the first and second part resources, measures the received CSI-RS to obtain channel state information (i.e., measurement results), and sends the channel state information to the base station.

[0109] If downlink data transmission outside the DL Subband of the SBFD symbol is not allowed, the following method can be adopted: Method 1: The base station prohibits sending CSI-RS to the UE based on the first part of resources and the second part of resources, and the UE prohibits receiving CSI-RS based on the first part of resources and the second part of resources.

[0110] In Method 1, if the second type of CSI-RS resources exceed the range of DL suband, the base station will abandon transmitting CSI-RS, and the UE will no longer receive and measure CSI-RS on the corresponding time and frequency resources.

[0111] For periodic or semi-persistent CSI-RS, the UE can also measure CSI-RS received in previous periods that do not overlap with the uplink subband or guard subband, and use this as channel state information for the current period, then send this channel state information to the base station. For example, the UE measures CSI-RS that do not overlap with the UL subband in previous periods of this second type of CSI-RS resource, reports the CSI results to the base station according to the current CSI reporting procedure, and the RRC signaling does not configure timeRestricionForChannelMeasurement.

[0112] Method 2: The base station sends CSI-RS to the UE based on the first part of the resources and prohibits sending CSI-RS to the UE based on the second part of the resources. The UE receives CSI-RS based on the first part of the resources and prohibits receiving CSI-RS based on the second part of the resources. In Method 2, CSI-RS can only be sent within the DL Subband, and the portion outside the DL Subband is discarded. The UE receives a portion of the CSI-RS within the DL Subband.

[0113] In one example, for CSI-RS used for time-frequency tracking, if the size of the frequency domain resources used to transmit CSI-RS (i.e., the first part of the resources) is greater than 52 PRBs, then the UE uses the CSI-RS in the DL Subband for time and frequency offset tracking. If the size of the frequency domain resources used to transmit CSI-RS is no greater than 52 PRBs, then the UE will not use the CSI-RS in the DL Subband for time and frequency offset tracking.

[0114] For CSI-RS used for purposes other than time-frequency tracking, if the frequency domain resource size used for transmitting CSI-RS is greater than 24 PRBs, the UE can use the CSI-RS in the DL Subband to perform measurements, obtain CSI results, and report them to the base station. If the frequency domain resource size used for transmitting CSI-RS is no greater than 24 PRBs, the UE will not use the CSI-RS in the DL Subband to perform measurements.

[0115] In one example, after the UE receives CSI-RS based on the first part of the resources and prohibits receiving CSI-RS based on the second part of the resources, it can measure the CSI-RS received based on the first part of the resources to obtain the first channel state information (i.e., the CSI measurement result) and send the first channel state information to the base station.

[0116] In summary, the UE can obtain first channel state information (CSI measurement results corresponding to CSI-RS received from the first part of the second type of CSI-RS resources) and second channel state information (CSI measurement results corresponding to CSI-RS received from the first type of CSI-RS resources). The UE can send the first and second channel state information to the base station through different uplink resources, or the UE can send the first and second channel state information to the base station through the same uplink resources. For example, CSI reporting is associated with CSI-RS resource sets. For periodic or semi-persistent CSI-RS resource sets that span SBFD symbols or ordinary symbols, CSI can be reported in the following way:

[0117] Method A involves configuring different CSI reporting configurations for periodic or semi-persistent CSI-RS resources (i.e., Type II CSI-RS resources) of SBFD symbols and periodic or semi-persistent CSI-RS resources (i.e., Type I CSI-RS resources) of ordinary symbols. For example, CSI reporting needs to be associated with a specific CSI-RS resource in the CSI-RS resource set. That is, CSI-RS resources that do not overlap with the UL Subband or protection bandwidth (i.e., Type I CSI-RS resources) and CSI-RS resources that overlap with the UL Subband or protection bandwidth (i.e., Type II CSI-RS resources) each have separate associated CSI reporting configurations.

[0118] In summary, both the first type of CSI-RS resource and the second type of CSI-RS resource have separate associated CSI reporting configurations. Therefore, the UE sends the first channel state information corresponding to the second type of CSI-RS resource and the second channel state information corresponding to the first type of CSI-RS resource to the base station through different uplink resources.

[0119] Method B involves configuring the same CSI reporting for the periodic or semi-persistent CSI-RS resources of SBFD symbols and the periodic or semi-persistent CSI-RS resources of ordinary symbols. That is, the first type of CSI-RS resources and the second type of CSI-RS resources correspond to the same CSI reporting configuration. Therefore, the UE can send the first channel state information corresponding to the second type of CSI-RS resources and the second channel state information corresponding to the first type of CSI-RS resources to the base station through the same uplink resources.

[0120] For both methods A and B, the base station does not need to use special higher-layer signaling to inform the UE. When configuring CSI reporting, the base station can simply associate CSI reporting with the corresponding CSI-RS resources.

[0121] In one example, in mode 2, for wideband CSI reporting, the UE measures the first channel state information based only on all CSI-RS in the non-overlapping time-frequency resources (i.e., the first part of the second type of CSI-RS resources) and sends the first channel state information to the base station. The first channel state information may include, but is not limited to, at least one of the following: CQI, PMI, RI, LI, L1-RSRP, L1-SINR.

[0122] In one example, for CSI-RS used for beam refinement and beam management, if there are Type II CSI-RS resources that overlap with the UL Subband or guard bandwidth, and Type I CSI-RS resources that do not overlap with the UL Subband or guard bandwidth, the reporting of L1-RSRP and / or L1-SINR may include:

[0123] If the first channel state information includes multiple first L1-RSRPs and the second channel state information includes multiple second L1-RSRPs, then the UE can select N first L1-RSRPs from the multiple first L1-RSRPs and N second L1-RSRPs from the multiple second L1-RSRPs, and send the N first L1-RSRPs and N second L1-RSRPs to the base station. And / or, if the first channel state information includes multiple first L1-SINRs and the second channel state information includes multiple second L1-SINRs, then the UE can select N first L1-SINRs from the multiple first L1-SINRs and N second L1-SINRs from the multiple second L1-SINRs, and send the N first L1-SINRs and N second L1-SINRs to the base station.

[0124] For example, the L1-RSRP and / or L1-SINR in the CSI can be divided into two groups, each group containing either N (reporting only L1-RSRP or L1-SINR) values ​​or 2N (reporting both L1-RSRP and L1-SINR) values, where N can be 1, 2, 3, etc., without restriction. Each group of CSI includes the maximum L1-RSRP value, the second largest L1-RSRP value, ..., the Nth largest L1-RSRP value, and / or the maximum L1-SINR value, the second largest L1-SINR value, ..., the Nth largest L1-SINR value. The content of the first group of CSI is derived from non-overlapping first-type CSI-RS resources, i.e., selecting N second L1-RSRPs and / or N second L1-SINRs from the second channel state information. The content of the second group of CSI is derived from overlapping second-type CSI-RS resources, i.e., selecting N first L1-RSRPs and / or N first L1-SINRs from the first channel state information.

[0125] Arrange them in the order of the contents of the first group of CSIs, then the second group of CSIs, or in the order of the contents of the second group of CSIs, then the first group of CSIs. For example, the arrangement result is N second L1-RSRPs, N second L1-SINRs, N first L1-RSRPs, and N first L1-SINRs.

[0126] See Table 1 for examples of the structure of L1-RSRP and L1-SINR in CSI.

[0127] Table 1

[0128]

[0129] If N is 2, then the non-overlapping RSRP#1 / SINR#1 is the maximum L1-RSRP / maximum L1-SINR value in the second channel state information, the non-overlapping RSRP#2 / SINR#2 is the second largest L1-RSRP / second largest L1-SINR value in the second channel state information, and the differential RSRP#2 / SINR#2 is the difference between the second largest L1-RSRP / second largest L1-SINR value and the maximum L1-RSRP / maximum L1-SINR value. The overlapping RSRP#1 / SINR#1 is the maximum L1-RSRP / maximum L1-SINR value in the first channel state information, and the overlapping RSRP#2 / SINR#2 is the second largest L1-RSRP / second largest L1-SINR value in the first channel state information.

[0130] If the first channel state information includes multiple first L1-RSRPs and the second channel state information includes multiple second L1-RSRPs, then the UE selects 2N L1-RSRPs from the multiple first L1-RSRPs and multiple second L1-RSRPs and sends the 2N L1-RSRPs to the base station. And / or, if the first channel state information includes multiple first L1-SINRs and the second channel state information includes multiple second L1-SINRs, then the UE selects 2N L1-SINRs from the multiple first L1-SINRs and multiple second L1-SINRs and sends the 2N L1-SINRs to the base station. For example, the CSI content includes the maximum L1-RSRP value, the second largest L1-RSRP value, ..., the 2Nth largest L1-RSRP value, and / or, the maximum L1-SINR value, the second largest L1-SINR value, ..., the 2Nth largest L1-SINR value. The content of CSI can be derived from non-overlapping first-type CSI-RS resources and overlapping second-type CSI-RS resources, that is, selected from all channel state information.

[0131] In one example, wideband CSI reporting can only report coarse-grained CSI. To obtain more refined CSI, subband-based CSI reporting can be introduced, i.e., CSI reporting based on CSI subbands (CSI subbands are different from the subbands in SBFD). The base station can configure different CSI subband sizes according to the BWP size, as shown in Table 2, which provides examples of CSI subband sizes. The CSI reported based on CSI subbands can be PMI and / or CQI, etc., without restriction.

[0132] Table 2

[0133] BWP(PRBs) CSI Subband Sizes (PRBs) 24-72 4，8 73-144 8，16 145-275 16，32

[0134] In one example, if the first part of the second type of CSI-RS resources corresponds to at least one CSI subband, for each CSI subband, if the CSI subband completely overlaps with the uplink subband or guard subband of the SBFD symbol, then the measurement of CSI-RS received by the CSI subband is prohibited. That is, the UE abandons reporting CSI in the CSI subband that completely overlaps with the UL Subband, and reports CSI in the non-overlapping CSI subband.

[0135] For each CSI subband, if the CSI subband does not overlap with the uplink subband or guard subband of the SBFD symbol, the CSI-RS received by the CSI subband is measured to obtain the measurement result of the CSI subband (i.e., the first channel state information), that is, the CSI in the non-overlapping CSI subband is reported by the UE.

[0136] For each CSI subband, if the CSI subband partially overlaps with the uplink or guard subband of the SBFD symbol, the following procedure shall be followed. See [link / reference] Figure 4 The diagram shows a misalignment between the CSI subband and the UL subband. The size of the RBG (Resource Block Group) and the size of the CSI subband are both 8PRB. In RBG2 and RBG14, there are cases where the UL subband / protection subband is misaligned with the CSI subband, that is, the CSI subband partially overlaps with the UL subband or protection subband.

[0137] Method 2-1 prohibits the measurement of CSI-RS received by CSI subband, that is, the UE abandons reporting CSI in CSI subbands that overlap with the UL Subband and reports CSI in CSI subbands that do not overlap.

[0138] Method 2-2: Determine whether to measure the CSI-RS received by the CSI subband based on the size of the non-overlapping resources of the CSI subband. If yes, measure the CSI-RS received by the CSI subband and obtain the measurement result of the CSI subband. If no, prohibit the measurement of the CSI-RS received by the CSI subband.

[0139] For example, a CSI subband may include overlapping and non-overlapping resources with the UL Subband / Protection Subband. If the size of the non-overlapping resources is greater than or equal to half of the total resources of the CSI subband (this value is configurable and can also be 2 / 3, 3 / 4, etc.), such as when the size of the CSI subband is 8 PRB, if the size of the non-overlapping resources is greater than or equal to 4 PRB, then the CSI-RS received by the CSI subband is measured (e.g., CSI is calculated based on the non-overlapping resources). Otherwise, the measurement of the CSI-RS received by the CSI subband is prohibited.

[0140] In summary, if the first part of the second type of CSI-RS resources corresponds to at least one CSI sub-band, then the measurement results of each CSI sub-band can be obtained, and the first channel state information can be determined based on the measurement results of each CSI sub-band, such as the first channel state information including the measurement results of each CSI sub-band.

[0141] In one example, the base station can configure whether to use mode 1 or mode 2, and whether to use mode 2-1 or mode 2-2 within mode 2, via signaling (such as RRC signaling). For instance, the base station sends a first indication message to the UE, indicating whether to use mode 1 (prohibiting CSI-RS transmission based on the first and second part resources) or mode 2 (transmitting CSI-RS based on the first part resources and prohibiting CSI-RS transmission based on the second part resources). When the first indication message indicates mode 2, the base station can also send a second indication message to the UE, indicating whether to use mode 2-1 (prohibiting measurement of CSI-RS received in the CSI subband) or mode 2-2 (determining whether to measure CSI-RS received in the CSI subband based on the size of the non-overlapping resources in the CSI subband).

[0142] For example, an example of RRC signaling sent by a base station could be as follows:

[0143]

[0144] If csiReportUsingPartialCsirs is configured, it indicates that mode 2 is used; if this parameter is not configured, it indicates that mode 1 is used. csiReportUsingPartialCsiSubband can only be configured if mode 2 is used. If this parameter is configured, it indicates that mode 2-2 is used; if this parameter is not configured, it indicates that mode 2-1 is used.

[0145] In one example, when reporting Subband CQI and Subband PMI, both are measured and calculated by the UE using available CSI-RS resources in the DL Subband. The reporting format for Subband CQI and Subband PMI is not restricted here. The order of Subband CQI and Subband PMI in the CSI is based on the actual calculated order. For example, Subband PMI and Subband CQI overlapping with UL Subband or guard subbands are removed; only the Subband CQI and Subband PMI corresponding to the available CSI-RS resources for the CSI Subband are reported. After receiving the CSI reported by the UE, the base station determines which PRBs correspond to the reported Subband CQI and Subband PMI based on the CSI-RS frequency domain resources and CSI subband configuration in the DL Subband, thus enabling subsequent data scheduling in the frequency domain.

[0146] Fourth, separate configuration of CSI-RS resources and CSI reporting.

[0147] In the separate configuration mode of CSI-RS resources, the CSI-RS resources in SBFD symbols and those in ordinary symbols use different configurations. For example, the base station can configure a second CSI-RS resource set and a third CSI-RS resource set for the UE. The second CSI-RS resource set can include CSI-RS resources in SBFD symbols, denoted as the third type of CSI-RS resource, and the third type of CSI-RS resource is located in the downlink subband of the SBFD symbol. The third CSI-RS resource set can include CSI-RS resources in ordinary symbols, denoted as the fourth type of CSI-RS resource, and the fourth type of CSI-RS resource is located in the downlink symbol.

[0148] For the third type of CSI-RS resources in the second CSI-RS resource set, the configuration of the third type of CSI-RS resources is adjusted to ensure that all third type of CSI-RS resources are located within the DL Subband. In the time domain, for periodic CSI-RS and semi-persistent CSI-RS, the time slot where the CSI-RS is located is determined based on CSI-ResourcePeriodicityAndOffset. For aperiodic CSI-RS, the time slot where the CSI-RS is located is determined by the time slot of the DCI activation message. Furthermore, firstOFDMSymbolInTimeDomain and firstOFDMSymbolInTimeDomain2 can be used to determine the symbol position of the CSI-RS within the time slot, ensuring that all individually configured third type of CSI-RS resources are located within SBFD symbols, i.e., the third type of CSI-RS resources will not exceed the range of the DL Subband of the SBFD symbols.

[0149] See Figure 5 The diagram shows a CSI-RS resource set (denoted as the second CSI-RS resource set) configured for an SBFD symbol. The second CSI-RS resource set includes third-class CSI-RS resources (such as CSI-RS0 and CSI-RS1) located in the SBFD symbol. CSI-RS0 is located in slot 1 of each frame structure period, and CSI-RS1 is located in slot 4 of each frame structure period. The third-class CSI-RS resources are located in the DL Subband and do not overlap with the UL Subband or the guard bandwidth.

[0150] In one example, the base station can allocate a second CSI-RS resource set and a third CSI-RS resource set to the UE, and the second CSI-RS resource set may include at least one third type of CSI-RS resource, and the third CSI-RS resource set may include at least one fourth type of CSI-RS resource.

[0151] The base station sends second resource configuration information corresponding to the second CSI-RS resource set and third resource configuration information corresponding to the third CSI-RS resource set to the UE. After receiving the second and third resource configuration information, the UE determines the second CSI-RS resource set based on the second resource configuration information and the third CSI-RS resource set based on the third resource configuration information. The second resource configuration information can be dynamically configured or semi-statically configured. The third resource configuration information can also be dynamically configured or semi-statically configured.

[0152] The base station sends CSI-RS to the UE based on the third type of CSI-RS resources in the second CSI-RS resource set and / or the fourth type of CSI-RS resources in the third CSI-RS resource set. The UE receives CSI-RS based on the third type of CSI-RS resources in the second CSI-RS resource set and / or the fourth type of CSI-RS resources in the third CSI-RS resource set. The UE measures the received CSI-RS to obtain the CSI and sends the CSI to the base station.

[0153] In one example, for each fourth type CSI-RS resource in the third CSI-RS resource set, since the fourth type CSI-RS resource is located in the downlink symbol, the base station can send CSI-RS to the UE based on the fourth type CSI-RS resource. The UE receives the CSI-RS based on the fourth type CSI-RS resource, measures the CSI received from the fourth type CSI-RS resource to obtain the CSI, and sends the CSI to the base station.

[0154] In one example, for each third type of CSI-RS resource in the second CSI-RS resource set, the third type of CSI-RS resource is located in the SBFD symbol and does not exceed the range of the DL Subband of the SBFD symbol. Therefore, the base station can send CSI-RS to the UE based on the third type of CSI-RS resource. The UE receives the CSI-RS based on the third type of CSI-RS resource, measures the CSI received from the third type of CSI-RS resource to obtain the CSI, and sends the CSI to the base station.

[0155] In one example, the third type of CSI-RS resource includes only resources located in the DL subband of the SBFD symbol. If the third type of CSI-RS resource occupies only contiguous resources in the DL subband, the second resource configuration information includes the RB start position and the number of RBs occupied for the contiguous resources. If the third type of CSI-RS resource occupies two non-contiguous resources in the DL subband, the second resource configuration information includes the RB start position and the number of RBs occupied for each of the two resources. See also Figure 5 As shown, CSI-RS1 occupies continuous resources of the DL Subband, while CSI-RS0 occupies two non-contiguous resources of the DL Subband. That is, the two non-contiguous resources belong to the same CSI-RS, and the two non-contiguous resources are located on both sides of the UL Subband.

[0156] In the frequency domain, the starting RB and the number of RBs in the freqBand parameter determine the starting position and number of RBs occupied by the CSI-RS resource. These RB starting positions and RB numbers ensure that all CSI-RS frequency domain resources are within the DLSubband. If the DL Subband consists of two non-contiguous resources, an additional pair of startingRB and nrofRBs is introduced into the CSI-RS resource configuration. These two pairs of startingRB and nrofRBs indicate the CSI-RS resources in different DL Subbands, as shown below:

[0157]

[0158] In one example, regarding the alignment of CSI-RS resources and DL Subband boundaries, the RB index of the starting position of the CSI-RS resource's RBs can be an integer multiple of a first value (e.g., 4), the number of RBs occupied by the CSI-RS resource can be an integer multiple of the first value, and the minimum number of RBs occupied is a second value (e.g., 24). However, the starting position of the DL Subband may not be an integer multiple of the first value, and the number of RBs occupied by the DL Subband may be less than the second value. Based on this, the following approach can be adopted:

[0159] Method a: The starting position of the RB corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied by the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied by the third type of CSI-RS resource is an integer multiple of the first value. For example, when configuring the third type of CSI-RS resource in a DL Subband, the starting position of the RB is an integer multiple of 4, the number of RBs occupied is an integer multiple of 4, and the minimum number of RBs occupied is 24, that is, the number of RBs occupied is greater than or equal to 24. If the DL Subband has less than 24 RBs, then configuring the third type of CSI-RS resource in that DL Subband is abandoned.

[0160] In method b, the starting position of the RB corresponding to the third type of CSI-RS resource is the starting position of the DL Subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resource is arbitrary. For example, when configuring the third type of CSI-RS resource in the DL Subband, the starting position of the DL Subband is used as the starting position of the RBs corresponding to the third type of CSI-RS resource, and the number of RBs occupied is configured according to the frequency domain resources required by the third type of CSI-RS resource, that is, the number of RBs occupied is arbitrary. If the size of the third type of CSI-RS resource exceeds the range of the DL Subband, then the third type of CSI-RS resource occupies the entire DL Subband.

[0161] In method b, the RB index of the starting position of the RB corresponding to the third type of CSI-RS resource does not have to be an integer multiple of 4, the number of RBs occupied corresponding to the third type of CSI-RS resource does not have to be an integer multiple of 4, and the size of the number of RBs occupied corresponding to the third type of CSI-RS resource is not restricted and can be any value.

[0162] For method b, if CSI reporting is based on Subband granularity (i.e., CSI subband), then the first CSI subband corresponding to the CSI-RS resource in the first DL Subband starts from startingRB, and its size is the size of the CSI subband configured by the higher-layer signaling. The range of subsequent CSI subbands is calculated sequentially, if The size of the last CSI subband is if The size of the last CSI subband is If a second DL Subband exists and that DL Subband is configured with CSI-RS resources, then the first CSI subband corresponding to that CSI-RS resource starts from startingRB1, and its size is the size of the CSI subband configured by the higher-layer signaling. The range of subsequent CSI subbands is calculated sequentially, if The size of the last CSI subband is like The size of the last CSI subband is In this way, the indexes of the CSI subbands corresponding to the CSI-RS resources in all DL subbands are arranged from low to high according to the order of the starting PRB index.

[0163] For method b, a new capability parameter, such as csiRsCapability, can be introduced into the UE's capability set. If the UE supports the CSI-RS configuration specified in method b, the UE will report this parameter to the base station during capability reporting, and the base station can use method b to configure CSI-RS resources. If the UE does not report this capability, the base station will use method a by default to configure CSI-RS resources. In summary, if the UE's capability parameters indicate that it has the capability to support arbitrary RB start positions, then method b is used. If the UE's capability parameters indicate that it does not have the capability to support arbitrary RB start positions, then method a is used.

[0164] In one example, the UE performs measurements on separately configured CSI-RS resources (such as Category 3 CSI-RS resources) and reports the measurement results into the CSI corresponding to that CSI-RS resource. For measurement results such as RI, LI, L1-RSRP, L1-SINR, wideband CQI, and wideband PMI, the UE calculates them based on all time-frequency resources corresponding to that CSI-RS. For Subband-based CSI reporting, the Subband PMI and Subband CQI in the CSI content are reported according to the Subband index order mentioned above.

[0165] Fifth, CSI-RS power control.

[0166] Whether using a unified or individual configuration of CSI-RS resources, if CSI-RS transmission is not permitted on resources outside the DLSubband, the CSI-RS power allocation algorithm needs to be adjusted to adapt to the new CSI-RS resource configuration strategy. Assume the total number of PRBs in the BWP is... The PRB assigned to CSI-RS in ordinary symbols is The PRB assigned to the CSI-RS in the SBFD symbol is Because the UL Subband and Protective Subband occupy some PRB resources, Assuming the density of CSI-RS is ρ, meaning there are ρ REs in each PRB, the transmit power reserved for CSI-RS is Therefore, for CSI-RS that is transmitted only on the DL Subband, the transmit power can be set using the following scheme:

[0167] transmit power All resources are used for CSI-RS. In this scheme, the energy per resource element (EPRE) of each RE in CSI-RS is... And it is greater than the EPRE of CSI-RS in ordinary symbols: This can improve the SINR when the UE receives CSI-RS, which is beneficial for the reception of downlink CSI-RS.

[0168] The CSI-RS in this scheme has the same EPRE as the CSI-RS in the standard notation, and the total power of the CSI-RS is [missing information]. The value is less than This avoids adjacent channel interference, but the total power of CSI-RS is reduced, which may have some impact on UE reception.

[0169] The base station determines which scheme to use based on the scenario, without informing the UE.

[0170] In one example, when a base station transmits CSI-RS based on the first portion of Type II CSI-RS resources and prohibits transmission of CSI-RS based on the second portion of Type II CSI-RS resources, the target transmit power can be determined based on the maximum transmit power of the Type II CSI-RS resources (i.e., the transmit power matching the first and second portions of resources). At the target transmit power, CSI-RS is transmitted based on the first portion of resources. Alternatively, the target transmit power can be determined based on the maximum transmit power of the Type II CSI-RS resources and the resource ratio, where the resource ratio is the ratio of the first portion of resources to the Type II CSI-RS resources (i.e., the ratio of the first and second portions of resources). At the target transmit power, CSI-RS is transmitted based on the first portion of resources.

[0171] Based on the same inventive concept, a CSI-RS transmission device, a base station, and a UE corresponding to the CSI-RS transmission method are also provided. Since the principle of solving the problem by the base station and UE is similar to that of the CSI-RS transmission method, the implementation of the base station and UE is the same as that of the CSI-RS transmission method, and the repeated parts will not be described again.

[0172] Based on the same concept as the above method, this application provides an example of a CSI-RS transmission device applied to user equipment, see [link to example]. Figure 6AAs shown, the apparatus includes: a first receiving module 611, configured to receive resource configuration information corresponding to a CSI-RS resource set sent by a base station, wherein the resource configuration information is used to indicate the CSI-RS resource set, and the CSI-RS resource set includes CSI-RS resources located in the SBFD symbol; the CSI-RS resources are outside the downlink subband of the SBFD symbol, or the CSI-RS resources are located in the downlink subband of the SBFD symbol; and a second receiving module 612, configured to receive CSI-RS sent by the base station based on the CSI-RS resources in the CSI-RS resource set.

[0173] In one example, the resource configuration information includes first resource configuration information corresponding to a first CSI-RS resource set. This first resource configuration information indicates the first CSI-RS resource set, which includes a first type of CSI-RS resources located in ordinary symbols and a second type of CSI-RS resources located in SBFD symbols. The second type of CSI-RS resources extend beyond the downlink subband of the SBFD symbol. Alternatively,

[0174] The resource configuration information includes second resource configuration information corresponding to the second CSI-RS resource set and third resource configuration information corresponding to the third CSI-RS resource set. The second resource configuration information is used to indicate the second CSI-RS resource set, and the third resource configuration information is used to indicate the third CSI-RS resource set. The second CSI-RS resource set includes third-class CSI-RS resources located in SBFD symbols, and the third-class CSI-RS resources are located in the downlink subband of the SBFD symbols. The third CSI-RS resource set includes fourth-class CSI-RS resources located in ordinary symbols.

[0175] In one example, if the second type of CSI-RS resources includes a first portion of resources in the downlink subband of an SBFD symbol and a second portion of resources in the uplink subband or guard subband of an SBFD symbol, the second receiving module 612, when receiving the CSI-RS transmitted by the base station based on the second type of CSI-RS resources in the first CSI-RS resource set, is specifically used for:

[0176] If downlink data transmission outside the downlink subband of the SBFD symbol is permitted, then CSI-RS is received based on the first and second portions of the second type of CSI-RS resources;

[0177] Alternatively, if downlink data transmission outside the downlink subband of the SBFD symbol is not permitted, then receiving CSI-RS based on the first and second portions of the second type of CSI-RS resources is prohibited; or, receiving CSI-RS based on the first portion of the second type of CSI-RS resources and prohibiting receiving CSI-RS based on the second portion of the second type of CSI-RS resources.

[0178] In one example, the device further includes (in) Figure 6A (not shown in the image):

[0179] The transmitting module is configured to: receive CSI-RS based on a first portion of the second type of CSI-RS resources and prohibit receiving CSI-RS based on a second portion of the second type of CSI-RS resources; measure the CSI-RS received on the first portion of the second type of CSI-RS resources to obtain first channel state information and transmit the first channel state information to the base station; after prohibiting receiving CSI-RS based on the first and second portions of the second type of CSI-RS resources, measure the CSI-RS that do not overlap with the uplink subband or guard subband in the previous period, determine the measurement result as the channel state information for the current period, and transmit the channel state information to the base station.

[0180] In one example, the transmitting module is further configured to, after receiving CSI-RS transmitted by the base station based on the first type of CSI-RS resource in the first CSI-RS resource set, measure the CSI-RS received by the first type of CSI-RS resource to obtain second channel state information, and send the second channel state information to the base station;

[0181] Specifically, when the sending module sends the first channel state information to the base station and the second channel state information to the base station, it is configured to: if the first channel state information includes multiple first L1-RSRPs and the second channel state information includes multiple second L1-RSRPs, then select N first L1-RSRPs from the multiple first L1-RSRPs and select N second L1-RSRPs from the multiple second L1-RSRPs, and send the N first L1-RSRPs and the N second L1-RSRPs to the base station; or, select 2N L1-RSRPs from the multiple first L1-RSRPs and the multiple second L1-RSRPs, and send the 2N L1-RSRPs to the base station; and / or,

[0182] If the first channel state information includes multiple first L1-SINRs and the second channel state information includes multiple second L1-SINRs, then N first L1-SINRs are selected from the multiple first L1-SINRs, and N second L1-SINRs are selected from the multiple second L1-SINRs, and the N first L1-SINRs and N second L1-SINRs are sent to the base station; or, 2N L1-SINRs are selected from the multiple first L1-SINRs and multiple second L1-SINRs, and the 2N L1-SINRs are sent to the base station.

[0183] In one example, when the transmitting module measures the CSI-RS received from the first portion of the second type of CSI-RS resource to obtain the first channel state information, it is specifically used for:

[0184] If the first part of the second type of CSI-RS resources corresponds to at least one CSI subband, for each CSI subband, if the CSI subband completely overlaps with the uplink subband or guard subband of the SBFD symbol, then the measurement of the CSI-RS received by the CSI subband is prohibited.

[0185] If the CSI subband does not overlap with the uplink subband or guard subband of the SBFD symbol, then the CSI-RS received by the CSI subband is measured to obtain the measurement result of the CSI subband.

[0186] If the CSI subband partially overlaps with the uplink subband or guard subband of the SBFD symbol, then measurement of the CSI-RS received by the CSI subband is prohibited; or, the determination of whether to measure the CSI-RS received by the CSI subband is based on the size of the non-overlapping resources of the CSI subband. If yes, the CSI-RS received by the CSI subband is measured to obtain the measurement result of the CSI subband; if no, measurement of the CSI-RS received by the CSI subband is prohibited.

[0187] The first channel state information is determined based on the measurement results of each CSI sub-band.

[0188] In one example, the first receiving module 611 is further configured to receive first indication information sent by the base station; wherein the first indication information is configured to indicate that CSI-RS transmission based on the first part of the second type of CSI-RS resources and the second part of the second type of CSI-RS resources is prohibited, or, configured to indicate that CSI-RS transmission based on the first part of the second type of CSI-RS resources is prohibited, and CSI-RS transmission based on the second part of the second type of CSI-RS resources is prohibited.

[0189] If the first indication information is used to indicate the transmission of CSI-RS based on the first part of the second type of CSI-RS resources and to prohibit the transmission of CSI-RS based on the second part of the second type of CSI-RS resources, the first receiving module 611 is further used to receive the second indication information sent by the base station.

[0190] The second indication information is used to indicate that CSI-RS received by a CSI subband that overlaps with the uplink subband or the guard subband should be prohibited from being measured, or to indicate whether to measure CSI-RS received by a CSI subband based on the size of the non-overlapping resources of the CSI subband.

[0191] In one example, the transmitting module is further configured to, after receiving CSI-RS transmitted by the base station based on the first type of CSI-RS resource in the first CSI-RS resource set, measure the CSI-RS received by the first type of CSI-RS resource to obtain second channel state information, and transmit the second channel state information to the base station; wherein the first channel state information and the second channel state information are transmitted to the base station through different uplink resources; or, the first channel state information and the second channel state information are transmitted to the base station through the same uplink resource.

[0192] In one example, the third type of CSI-RS resource only includes resources in the downlink subband located in the SBFD symbol; wherein: if the third type of CSI-RS resource only occupies continuous resources in the downlink subband, then the second resource configuration information includes the RB start position and the number of RBs occupied corresponding to the continuous resources;

[0193] If the third type of CSI-RS resource occupies two non-contiguous resources in the downlink subband, then the second resource configuration information includes the RB start position and RB occupancy number corresponding to the two resources respectively.

[0194] In one example, the starting position of the RB corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is an integer multiple of the first value; or,

[0195] The starting position of the RB corresponding to the third type of CSI-RS resource is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resource is any value;

[0196] Wherein, if the capability parameter of the user equipment indicates that it has the capability to support any RB start position, then the RB start position corresponding to the third type of CSI-RS resource is the start position of the downlink subband of the SBFD symbol, and the number of RBs occupied corresponding to the third type of CSI-RS resource is any value;

[0197] If the capability parameters of the user equipment indicate that it does not have the capability to support arbitrary RB start positions, then the RB start position corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is an integer multiple of the first value.

[0198] In one example, the first receiving module 611 is further configured to receive third indication information sent by the base station, the third indication information being used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is permitted, or to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is not permitted; and / or,

[0199] The first receiving module 611 is further configured to receive a fourth indication information sent by the base station, the fourth indication information being used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is permitted, or to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is not permitted.

[0200] Based on the same concept as the above method, this application provides an example of a CSI-RS transmission device applied to a base station, see [link to example]. Figure 6B As shown, the apparatus may include: a first transmitting module 621, configured to transmit resource configuration information corresponding to a CSI-RS resource set to a user equipment, wherein the resource configuration information is used to indicate the CSI-RS resource set used by the user equipment, and the CSI-RS resource set includes CSI-RS resources located in the SBFD symbol; the CSI-RS resources are outside the downlink subband of the SBFD symbol, or the CSI-RS resources are located in the downlink subband of the SBFD symbol; and a second transmitting module 622, configured to transmit CSI-RS to the user equipment based on the CSI-RS resources in the CSI-RS resource set, so that the user equipment receives CSI-RS based on the CSI-RS resources in the CSI-RS resource set.

[0201] In one example, when the first sending module 621 sends the resource configuration information corresponding to the CSI-RS resource set to the user equipment, it is specifically used for:

[0202] If the user equipment corresponds to the first CSI-RS resource set, then the first resource configuration information corresponding to the first CSI-RS resource set is sent to the user equipment; wherein, the first CSI-RS resource set includes a first type of CSI-RS resources located in ordinary symbols and a second type of CSI-RS resources located in SBFD symbols, and the second type of CSI-RS resources have exceeded the range of the downlink subband of the SBFD symbol; or,

[0203] If the user equipment corresponds to a second CSI-RS resource set and a third CSI-RS resource set, then send the second resource configuration information corresponding to the second CSI-RS resource set and the third resource configuration information corresponding to the third CSI-RS resource set to the user equipment; wherein, the second CSI-RS resource set includes third-type CSI-RS resources located in SBFD symbols, and the third-type CSI-RS resources are located in the downlink subband of the SBFD symbols, and the third CSI-RS resource set includes fourth-type CSI-RS resources located in ordinary symbols.

[0204] In one example, if the second type of CSI-RS resources includes a first portion of resources in the downlink subband of an SBFD symbol and a second portion of resources in the uplink subband or guard subband of an SBFD symbol, the second transmitting module 622, when transmitting CSI-RS to the user equipment based on the second type of CSI-RS resources in the first CSI-RS resource set, is specifically used for:

[0205] If downlink data transmission outside the downlink subband of the SBFD symbol is permitted, then CSI-RS is transmitted based on the first and second portions of the second type of CSI-RS resources;

[0206] Alternatively, if downlink data transmission outside the downlink subband of the SBFD symbol is not permitted, then CSI-RS transmission based on the first and second portions of the second type of CSI-RS resources is prohibited; or, CSI-RS transmission based on the first portion of the second type of CSI-RS resources is permitted, and CSI-RS transmission based on the second portion of the second type of CSI-RS resources is prohibited.

[0207] In one example, the first sending module 621 is further configured to send first indication information to the user equipment; wherein the first indication information is configured to indicate that CSI-RS transmission based on the first part of the second type of CSI-RS resources and the second part of the second type of CSI-RS resources is prohibited, or, configured to indicate that CSI-RS transmission based on the first part of the second type of CSI-RS resources is prohibited, and CSI-RS transmission based on the second part of the second type of CSI-RS resources is prohibited.

[0208] If the first indication information is used to indicate the transmission of CSI-RS based on the first part of the second type of CSI-RS resources and to prohibit the transmission of CSI-RS based on the second part of the second type of CSI-RS resources, the first sending module is further used to send the second indication information to the user equipment.

[0209] The second indication information is used to indicate that CSI-RS received by a CSI subband that overlaps with the uplink subband or the guard subband should be prohibited from being measured, or to indicate whether to measure CSI-RS received by a CSI subband based on the size of the non-overlapping resources of the CSI subband.

[0210] In one example, the third type of CSI-RS resource only includes resources in the downlink subband located in the SBFD symbol; wherein: if the third type of CSI-RS resource only occupies continuous resources in the downlink subband, then the second resource configuration information includes the RB start position and the number of RBs occupied corresponding to the continuous resources;

[0211] If the third type of CSI-RS resource occupies two non-contiguous resources in the downlink subband, then the second resource configuration information includes the RB start position and RB occupancy number corresponding to the two resources respectively.

[0212] In one example, the starting position of the RB corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is an integer multiple of the first value; or,

[0213] The starting position of the RB corresponding to the third type of CSI-RS resource is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resource is any value;

[0214] Wherein, if the capability parameter of the user equipment indicates that it has the capability to support any RB start position, then the RB start position corresponding to the third type of CSI-RS resource is the start position of the downlink subband of the SBFD symbol, and the number of RBs occupied corresponding to the third type of CSI-RS resource is any value;

[0215] If the capability parameters of the user equipment indicate that it does not have the capability to support arbitrary RB start positions, then the RB start position corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is an integer multiple of the first value.

[0216] In one example, the first transmitting module 621 is further configured to transmit third indication information to the user equipment, wherein the third indication information is used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is permitted, or to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is not permitted; and / or, the first transmitting module is further configured to transmit fourth indication information to the user equipment, wherein the fourth indication information is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is permitted, or to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is not permitted.

[0217] In one example, when the second sending module 622 sends CSI-RS based on a first portion of the resources of the second type of CSI-RS resources and prohibits sending CSI-RS based on a second portion of the resources of the second type of CSI-RS resources, it is specifically used for:

[0218] The target transmit power is determined based on the maximum transmit power of the second type of CSI-RS resources; or, the target transmit power is determined based on the maximum transmit power and resource ratio of the second type of CSI-RS resources, wherein the resource ratio is the ratio of the first part of resources to the second type of CSI-RS resources.

[0219] At the target transmit power, CSI-RS is transmitted based on the first portion of resources.

[0220] Based on the same application concept as the above method, this application proposes a base station as an example, see [link to example]. Figure 7A As shown, the base station may include a processor 711 and a machine-readable storage medium 712, the machine-readable storage medium 712 storing machine-executable instructions that can be executed by the processor 711; the processor 711 is used to execute the machine-executable instructions to implement the CSI-RS transmission method disclosed in the above example of this application.

[0221] In one example, processor 711 may include one or more processing cores, such as a quad-core processor, an octa-core processor, etc. Processor 711 may be implemented using at least one hardware form selected from DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). Processor 711 may also include a main processor and a coprocessor. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, processor 711 may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the screen.

[0222] In one example, the base station may optionally include: a peripheral device interface 713 and at least one peripheral device. The processor 711 and the peripheral device interface 713 can be connected via a bus or signal line. Each peripheral device can be connected to the peripheral device interface 713 via a bus, signal line, or circuit board. The peripheral device may include at least one of: a radio frequency circuit 714 and a power supply 715.

[0223] The radio frequency (RF) circuit 714 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The RF circuit 714 communicates with communication networks and other communication devices via electromagnetic signals. The RF circuit 714 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals back into electrical signals. Optionally, the RF circuit 714 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a user identity module card, etc. The RF circuit 714 can communicate with user equipment through at least one wireless communication protocol. This wireless communication protocol includes, but is not limited to: the World Wide Web, metropolitan area networks, intranets, various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and / or WiFi (Wireless Fidelity) networks.

[0224] The power supply 715 is used to power the various components in the base station. The power supply 715 can be AC ​​power, DC power, a disposable battery, or a rechargeable battery.

[0225] For example, when the processor 711 executes machine-executable instructions, it controls the radio frequency circuit 714 to perform the following steps: sending resource configuration information corresponding to the CSI-RS resource set to the user equipment, the resource configuration information indicating the CSI-RS resource set used by the user equipment, and the CSI-RS resource set including CSI-RS resources located in the SBFD symbol; the CSI-RS resources are outside the downlink subband of the SBFD symbol, or the CSI-RS resources are located in the downlink subband of the SBFD symbol;

[0226] CSI-RS is sent to the user equipment based on the CSI-RS resources in the CSI-RS resource set, so that the user equipment can receive CSI-RS based on the CSI-RS resources in the CSI-RS resource set.

[0227] Based on the same application concept as the above method, this application proposes a user equipment as an example, see [link to example]. Figure 7B As shown, the user equipment may include a processor 721 and a machine-readable storage medium 722, the machine-readable storage medium 722 storing machine-executable instructions that can be executed by the processor 721; the processor 721 is used to execute the machine-executable instructions to implement the CSI-RS transmission method disclosed in the above example of this application.

[0228] In one example, processor 721 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. Processor 721 may be implemented using at least one hardware form selected from DSP, FPGA, and PLA. Processor 721 may also include a main processor and a coprocessor.

[0229] In one example, the user equipment further includes a peripheral device interface 723 and at least one peripheral device. The processor 721 and the peripheral device interface 723 can be connected via a bus or signal line. Each peripheral device can be connected to the peripheral device interface 723 via a bus, signal line, or circuit board. The peripheral device may include at least one of the following: radio frequency circuitry 724, a touch display screen 725, a camera 726, and a power supply 727.

[0230] Radio frequency (RF) circuit 724 is used to receive and transmit RF signals, also known as electromagnetic signals. RF circuit 724 communicates with communication networks and other communication devices via electromagnetic signals. RF circuit 724 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals back into electrical signals. Optionally, RF circuit 724 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a user identity module card, etc. RF circuit 724 can communicate with a base station via at least one wireless communication protocol. This wireless communication protocol includes, but is not limited to: the World Wide Web, metropolitan area networks, intranets, various generations of mobile communication networks, wireless local area networks, and / or WiFi.

[0231] Display screen 725 is used to display a user interface (UI). This UI may include graphics, text, icons, video, and any combination thereof. When display screen 725 is a touch display screen, it also has the ability to collect touch signals on or above its surface. These touch signals can be input as control signals to processor 721 for processing. In this case, display screen 725 can also be used to provide virtual buttons and / or a virtual keyboard, also known as soft buttons and / or a soft keyboard.

[0232] In some embodiments, there may be one display screen 725, which is disposed on the front panel of the user device; in other embodiments, there may be at least two display screens 725, which are disposed on different surfaces of the user device or have a foldable design; in still other embodiments, the display screen 725 may be a flexible display screen, disposed on a curved surface or a folded surface of the user device. Furthermore, the display screen 725 may be configured as a non-rectangular irregular shape, i.e., a non-rectangular screen. The display screen 725 may be made of materials such as LCD (Liquid Crystal Display) or OLED (Organic Light-Emitting Diode).

[0233] Camera assembly 726 is used to acquire images or videos. Optionally, camera assembly 726 includes a front-facing camera and a rear-facing camera. Typically, the front-facing camera is located on the front panel of the user device, and the rear-facing camera is located on the back of the user device. In some embodiments, there are at least two rear-facing cameras, which are any one of a main camera, a depth-sensing camera, a wide-angle camera, and a telephoto camera, to achieve background blurring by fusion of the main camera and the depth-sensing camera, panoramic shooting by fusion of the main camera and the wide-angle camera, VR (Virtual Reality) shooting, or other fusion shooting functions. In some embodiments, camera assembly 726 may also include a flash. The flash can be a single-color temperature flash or a dual-color temperature flash. A dual-color temperature flash refers to a combination of a warm-light flash and a cool-light flash, which can be used for light compensation at different color temperatures.

[0234] Power supply 727 is used to supply power to various components in a user device. Power supply 727 can be AC ​​power, DC power, a disposable battery, or a rechargeable battery. When power supply 727 includes a rechargeable battery, the rechargeable battery can be a wired rechargeable battery or a wireless rechargeable battery. A wired rechargeable battery is a battery that is charged via a wired line, while a wireless rechargeable battery is a battery that is charged via a wireless coil. The rechargeable battery can also be used to support fast charging technology.

[0235] For example, when the processor 721 executes machine-executable instructions, it controls the radio frequency circuit 724 to implement the following steps: receiving resource configuration information corresponding to the CSI-RS resource set sent by the base station, wherein the resource configuration information is used to indicate the CSI-RS resource set, and the CSI-RS resource set includes CSI-RS resources located in the SBFD symbol; the CSI-RS resources are outside the downlink subband of the SBFD symbol, or the CSI-RS resources are located in the downlink subband of the SBFD symbol;

[0236] CSI-RS received from the base station is based on the CSI-RS resources in the CSI-RS resource set.

[0237] Based on the same concept as the above method, one example of this application also provides a machine-readable storage medium storing a plurality of computer instructions, which, when executed by a processor, can implement the CSI-RS transmission method disclosed in the above example of this application.

[0238] The aforementioned machine-readable storage medium can be any electronic, magnetic, optical, or other physical storage device that can contain or store information, such as executable instructions, data, etc. For example, machine-readable storage media can be: RAM (Random Access Memory), volatile memory, non-volatile memory, flash memory, storage drives (such as hard disk drives), solid-state drives, any type of storage disk (such as optical discs, DVDs, etc.), or similar storage media, or combinations thereof.

[0239] The systems, devices, modules, or units described in the above embodiments can be implemented by a computer entity or by a product with a certain function. A typical implementation device is a computer, which can be a personal computer, laptop computer, cellular phone, camera phone, smartphone, personal digital assistant, media player, navigation device, email sending and receiving device, game console, tablet computer, wearable device, or any combination of these devices.

[0240] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A CSI-RS transmission method, characterized in that, Applied to user equipment, including: The system receives resource configuration information corresponding to a CSI-RS resource set sent by a base station. The resource configuration information indicates the CSI-RS resource set, and the CSI-RS resource set includes CSI-RS resources located in SBFD symbols. The CSI-RS resources either exceed the downlink subband range of the SBFD symbol, or the CSI-RS resources are located in the downlink subband of the SBFD symbol. The resource configuration information includes first resource configuration information corresponding to a first CSI-RS resource set, which indicates the first CSI-RS resource set. The first CSI-RS resource set includes a first type of CSI-RS resources located in ordinary symbols and a second type of CSI-RS resources located in SBFD symbols, where the second type of CSI-RS resources exceed the downlink subband range of the SBFD symbol. Based on the CSI-RS resources in the CSI-RS resource set, receive the CSI-RS sent by the base station.

2. The method according to claim 1, characterized in that, The resource configuration information includes second resource configuration information corresponding to the second CSI-RS resource set and third resource configuration information corresponding to the third CSI-RS resource set. The second resource configuration information is used to indicate the second CSI-RS resource set, and the third resource configuration information is used to indicate the third CSI-RS resource set. The second CSI-RS resource set includes third-class CSI-RS resources located in SBFD symbols, and the third-class CSI-RS resources are located in the downlink subband of the SBFD symbols. The third CSI-RS resource set includes fourth-class CSI-RS resources located in ordinary symbols.

3. The method according to claim 2, characterized in that, If the second type of CSI-RS resources includes a first portion of resources located in the downlink subband of an SBFD symbol and a second portion of resources located in the uplink subband or guard subband of an SBFD symbol, then the CSI-RS received by the base station based on the CSI-RS resources in the CSI-RS resource set includes: CSI-RS received by the base station based on the second type of CSI-RS resources in the first CSI-RS resource set; wherein, If downlink data transmission outside the downlink subband of the SBFD symbol is permitted, then CSI-RS is received based on the first and second portions of the second type of CSI-RS resources; Alternatively, if downlink data transmission outside the downlink subband of the SBFD symbol is not permitted, then receiving CSI-RS based on the first and second portions of the second type of CSI-RS resources is prohibited; or, receiving CSI-RS based on the first portion of the second type of CSI-RS resources and prohibiting receiving CSI-RS based on the second portion of the second type of CSI-RS resources.

4. The method according to claim 3, characterized in that, After receiving CSI-RS based on the first part of the second type of CSI-RS resources and prohibiting receiving CSI-RS based on the second part of the second type of CSI-RS resources, the method further includes: measuring the CSI-RS received on the first part of the second type of CSI-RS resources to obtain first channel state information, and sending the first channel state information to the base station; After prohibiting the reception of CSI-RS based on the first and second part of the second type of CSI-RS resources, the method further includes: measuring based on CSI-RS that do not overlap with the uplink subband or guard subband in the previous period, determining the measurement result as the channel state information of the current period, and sending the channel state information to the base station.

5. The method according to claim 4, characterized in that, After receiving CSI-RS from the base station based on the first type of CSI-RS resource in the first CSI-RS resource set, the CSI-RS received from the first type of CSI-RS resource is measured to obtain the second channel state information, and the second channel state information is sent to the base station. The step of sending the first channel state information to the base station and sending the second channel state information to the base station includes: if the first channel state information includes a plurality of first L1-RSRPs and the second channel state information includes a plurality of second L1-RSRPs, then N first L1-RSRPs are selected from the plurality of first L1-RSRPs, and N second L1-RSRPs are selected from the plurality of second L1-RSRPs, and the N first L1-RSRPs and the N second L1-RSRPs are sent to the base station; or, 2N L1-RSRPs are selected from the plurality of first L1-RSRPs and the plurality of second L1-RSRPs, and the 2N L1-RSRPs are sent to the base station; and / or If the first channel state information includes multiple first L1-SINRs and the second channel state information includes multiple second L1-SINRs, then N first L1-SINRs are selected from the multiple first L1-SINRs, and N second L1-SINRs are selected from the multiple second L1-SINRs, and the N first L1-SINRs and N second L1-SINRs are sent to the base station; or, 2N L1-SINRs are selected from the multiple first L1-SINRs and multiple second L1-SINRs, and the 2N L1-SINRs are sent to the base station.

6. The method according to claim 4, characterized in that, The measurement of CSI-RS received from the first portion of the second type of CSI-RS resources to obtain the first channel state information includes: If the first part of the second type of CSI-RS resources corresponds to at least one CSI subband, for each CSI subband, if the CSI subband completely overlaps with the uplink subband or guard subband of the SBFD symbol, then the measurement of the CSI-RS received by the CSI subband is prohibited. If the CSI subband does not overlap with the uplink subband or guard subband of the SBFD symbol, then the CSI-RS received by the CSI subband is measured to obtain the measurement result of the CSI subband. If the CSI subband partially overlaps with the uplink subband or guard subband of the SBFD symbol, then measurement of the CSI-RS received by the CSI subband is prohibited; or, the determination of whether to measure the CSI-RS received by the CSI subband is based on the size of the non-overlapping resources of the CSI subband. If yes, the CSI-RS received by the CSI subband is measured to obtain the measurement result of the CSI subband; if no, measurement of the CSI-RS received by the CSI subband is prohibited. The first channel state information is determined based on the measurement results of each CSI sub-band.

7. The method according to claim 6, characterized in that, The method further includes: Receive first indication information sent by the base station; wherein the first indication information is used to indicate that CSI-RS transmission based on the first part of the resources and the second part of the resources of the second type of CSI-RS resources is prohibited, or, is used to indicate that CSI-RS transmission based on the first part of the resources of the second type of CSI-RS resources is prohibited, and CSI-RS transmission based on the second part of the resources of the second type of CSI-RS resources is prohibited. If the first indication information is used to indicate the transmission of CSI-RS based on the first part of the resources of the second type of CSI-RS resources and to prohibit the transmission of CSI-RS based on the second part of the resources of the second type of CSI-RS resources, then the second indication information sent by the base station is received; wherein, the second indication information is used to indicate that the measurement of CSI-RS received by the CSI subband that overlaps with the uplink subband or the guard subband is prohibited, or, is used to indicate whether to determine whether to measure the CSI-RS received by the CSI subband based on the size of the non-overlapping resources of the CSI subband.

8. The method according to claim 4, characterized in that, After receiving CSI-RS from the base station based on the first type of CSI-RS resource in the first CSI-RS resource set, the CSI-RS received from the first type of CSI-RS resource is measured to obtain the second channel state information, and the second channel state information is sent to the base station. The first channel state information and the second channel state information are sent to the base station using different uplink resources; or, the first channel state information and the second channel state information are sent to the base station using the same uplink resources.

9. The method according to claim 2, characterized in that, The third type of CSI-RS resources only include resources located in the downlink subband of the SBFD symbol; wherein: If the third type of CSI-RS resource only occupies continuous resources in the downlink subband, then the second resource configuration information includes the starting position of the RB and the number of RBs occupied corresponding to the continuous resource; If the third type of CSI-RS resource occupies two non-contiguous resources in the downlink subband, then the second resource configuration information includes the RB start position and RB occupancy number corresponding to the two resources respectively.

10. The method according to claim 9, characterized in that, The starting position of the RB corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied by the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied by the third type of CSI-RS resource is an integer multiple of the first value. or, The starting position of the RB corresponding to the third type of CSI-RS resource is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resource is any value; Wherein, if the capability parameter of the user equipment indicates that it has the capability to support any RB start position, then the RB start position corresponding to the third type of CSI-RS resource is the start position of the downlink subband of the SBFD symbol, and the number of RBs occupied corresponding to the third type of CSI-RS resource is any value; If the capability parameters of the user equipment indicate that it does not have the capability to support arbitrary RB start positions, then the RB start position corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is an integer multiple of the first value.

11. The method according to any one of claims 1-10, characterized in that, The method further includes: The system receives a third indication message sent by the base station, the third indication message being used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is permitted, or to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is not permitted; and / or, The system receives a fourth indication message sent by the base station, which indicates that uplink data transmission outside the uplink subband of the SBFD symbol is permitted, or indicates that uplink data transmission outside the uplink subband of the SBFD symbol is not permitted.

12. A CSI-RS transmission method, characterized in that, Applied to base stations, including: Resource configuration information corresponding to a CSI-RS resource set is sent to the user equipment. This resource configuration information indicates the CSI-RS resource set used by the user equipment, and the CSI-RS resource set includes CSI-RS resources located in SBFD symbols. The CSI-RS resources either exceed the downlink subband range of the SBFD symbol or are located within the downlink subband of the SBFD symbol. If the user equipment corresponds to a first CSI-RS resource set, first resource configuration information corresponding to the first CSI-RS resource set is sent to the user equipment. The first CSI-RS resource set includes a first type of CSI-RS resources located in ordinary symbols and a second type of CSI-RS resources located in SBFD symbols, and the second type of CSI-RS resources exceed the downlink subband range of the SBFD symbol. The user equipment sends a CSI-RS to the user equipment based on the CSI-RS resources in the CSI-RS resource set, so that the user equipment receives the CSI-RS based on the CSI-RS resources in the CSI-RS resource set.

13. The method according to claim 12, characterized in that, Sending the resource configuration information corresponding to the CSI-RS resource set to the user equipment further includes: If the user equipment corresponds to a second CSI-RS resource set and a third CSI-RS resource set, then send the second resource configuration information corresponding to the second CSI-RS resource set and the third resource configuration information corresponding to the third CSI-RS resource set to the user equipment; wherein, the second CSI-RS resource set includes third-type CSI-RS resources located in SBFD symbols, and the third-type CSI-RS resources are located in the downlink subband of the SBFD symbols, and the third CSI-RS resource set includes fourth-type CSI-RS resources located in ordinary symbols.

14. The method according to claim 13, characterized in that, If the second type of CSI-RS resources includes a first portion of resources located in the downlink subband of an SBFD symbol and a second portion of resources located in the uplink subband or guard subband of an SBFD symbol, then sending CSI-RS to the user equipment based on the CSI-RS resources in the CSI-RS resource set includes: sending CSI-RS to the user equipment based on the second type of CSI-RS resources in the first CSI-RS resource set; wherein... If downlink data transmission outside the downlink subband of the SBFD symbol is permitted, then CSI-RS is transmitted based on the first and second portions of the second type of CSI-RS resources; Alternatively, if downlink data transmission outside the downlink subband of the SBFD symbol is not permitted, then CSI-RS transmission based on the first and second portions of the second type of CSI-RS resources is prohibited; or, CSI-RS transmission based on the first portion of the second type of CSI-RS resources is permitted, and CSI-RS transmission based on the second portion of the second type of CSI-RS resources is prohibited.

15. The method according to claim 14, characterized in that, The method further includes: Send a first indication message to the user equipment; wherein the first indication message is used to indicate that CSI-RS transmission based on the first part of the second type of CSI-RS resources and the second part of the second type of CSI-RS resources is prohibited, or, is used to indicate that CSI-RS transmission based on the first part of the second type of CSI-RS resources is prohibited, and CSI-RS transmission based on the second part of the second type of CSI-RS resources is prohibited. If the first indication information is used to indicate the transmission of CSI-RS based on the first part of the second type of CSI-RS resources and to prohibit the transmission of CSI-RS based on the second part of the second type of CSI-RS resources, then a second indication information is sent to the user equipment; wherein, the second indication information is used to indicate that the measurement of CSI-RS received by the CSI subband that overlaps with the uplink subband or the guard subband is prohibited, or, to indicate whether to measure the CSI-RS received by the CSI subband is determined based on the size of the non-overlapping resources of the CSI subband.

16. The method according to claim 13, characterized in that, The third type of CSI-RS resources only include resources located in the downlink subband of the SBFD symbol; wherein: If the third type of CSI-RS resource only occupies continuous resources in the downlink subband, then the second resource configuration information includes the starting position of the RB and the number of RBs occupied corresponding to the continuous resource; If the third type of CSI-RS resource occupies two non-contiguous resources in the downlink subband, then the second resource configuration information includes the RB start position and RB occupancy number corresponding to the two resources respectively.

17. The method according to claim 16, characterized in that, The starting position of the RB corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied by the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied by the third type of CSI-RS resource is an integer multiple of the first value. or, The starting position of the RB corresponding to the third type of CSI-RS resource is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resource is any value; Wherein, if the capability parameter of the user equipment indicates that it has the capability to support any RB start position, then the RB start position corresponding to the third type of CSI-RS resource is the start position of the downlink subband of the SBFD symbol, and the number of RBs occupied corresponding to the third type of CSI-RS resource is any value; If the capability parameters of the user equipment indicate that it does not have the capability to support arbitrary RB start positions, then the RB start position corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is an integer multiple of the first value.

18. The method according to any one of claims 12-17, characterized in that, The method further includes: Send a third indication message to the user equipment, wherein the third indication message is used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is permitted, or to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is not permitted; and / or, Send a fourth indication message to the user equipment, wherein the fourth indication message is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is permitted, or to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is not permitted.

19. The method according to claim 14, characterized in that, The provision of transmitting CSI-RS based on the first portion of the second type of CSI-RS resources and prohibiting the transmission of CSI-RS based on the second portion of the second type of CSI-RS resources includes: The target transmit power is determined based on the maximum transmit power of the second type of CSI-RS resources; or, the target transmit power is determined based on the maximum transmit power and resource ratio of the second type of CSI-RS resources, wherein the resource ratio is the ratio of the first part of resources to the second type of CSI-RS resources. At the target transmit power, CSI-RS is transmitted based on the first portion of resources.

20. A CSI-RS transmission device, characterized in that, Applied to user equipment, including: A first receiving module is configured to receive resource configuration information corresponding to a CSI-RS resource set sent by a base station. The resource configuration information indicates the CSI-RS resource set, and the CSI-RS resource set includes CSI-RS resources located in SBFD symbols. The CSI-RS resources are outside the downlink subband of the SBFD symbols, or the CSI-RS resources are located in the downlink subband of the SBFD symbols. The resource configuration information includes first resource configuration information corresponding to a first CSI-RS resource set, which indicates the first CSI-RS resource set. The first CSI-RS resource set includes a first type of CSI-RS resources located in ordinary symbols and a second type of CSI-RS resources located in SBFD symbols, wherein the second type of CSI-RS resources are outside the downlink subband of the SBFD symbols. The second receiving module is used to receive CSI-RS transmitted by the base station based on the CSI-RS resources in the CSI-RS resource set.

21. The apparatus according to claim 20, characterized in that, The resource configuration information includes second resource configuration information corresponding to the second CSI-RS resource set and third resource configuration information corresponding to the third CSI-RS resource set. The second resource configuration information is used to indicate the second CSI-RS resource set, and the third resource configuration information is used to indicate the third CSI-RS resource set. The second CSI-RS resource set includes third-class CSI-RS resources located in SBFD symbols, and the third-class CSI-RS resources are located in the downlink subband of the SBFD symbols. The third CSI-RS resource set includes fourth-class CSI-RS resources located in ordinary symbols.

22. The apparatus according to claim 21, characterized in that, If the second type of CSI-RS resources includes a first portion of resources in the downlink subband of an SBFD symbol and a second portion of resources in the uplink subband or guard subband of an SBFD symbol, the second receiving module, when receiving CSI-RS transmitted by the base station based on the CSI-RS resources in the CSI-RS resource set, is specifically configured to: receive CSI-RS transmitted by the base station based on the second type of CSI-RS resources in the first CSI-RS resource set; wherein... If downlink data transmission outside the downlink subband of the SBFD symbol is permitted, then CSI-RS is received based on the first and second portions of the second type of CSI-RS resources; Alternatively, if downlink data transmission outside the downlink subband of the SBFD symbol is not permitted, then receiving CSI-RS based on the first and second portions of the second type of CSI-RS resources is prohibited; or, receiving CSI-RS based on the first portion of the second type of CSI-RS resources and prohibiting receiving CSI-RS based on the second portion of the second type of CSI-RS resources.

23. The apparatus according to claim 22, characterized in that, Also includes: The transmitting module is configured to: receive CSI-RS based on a first portion of the second type of CSI-RS resources and prohibit receiving CSI-RS based on a second portion of the second type of CSI-RS resources; measure the CSI-RS received on the first portion of the second type of CSI-RS resources to obtain first channel state information and transmit the first channel state information to the base station; after prohibiting receiving CSI-RS based on the first and second portions of the second type of CSI-RS resources, measure the CSI-RS that do not overlap with the uplink subband or guard subband in the previous period, determine the measurement result as the channel state information for the current period, and transmit the channel state information to the base station.

24. The apparatus according to claim 23, characterized in that, The transmitting module is further configured to, after receiving CSI-RS transmitted by the base station based on the first type of CSI-RS resource in the first CSI-RS resource set, measure the CSI-RS received by the first type of CSI-RS resource to obtain second channel state information, and send the second channel state information to the base station; Specifically, when the sending module sends the first channel state information to the base station and the second channel state information to the base station, it is configured to: if the first channel state information includes multiple first L1-RSRPs and the second channel state information includes multiple second L1-RSRPs, then select N first L1-RSRPs from the multiple first L1-RSRPs and select N second L1-RSRPs from the multiple second L1-RSRPs, and send the N first L1-RSRPs and the N second L1-RSRPs to the base station; or, select 2N L1-RSRPs from the multiple first L1-RSRPs and the multiple second L1-RSRPs, and send the 2N L1-RSRPs to the base station; and / or, If the first channel state information includes multiple first L1-SINRs and the second channel state information includes multiple second L1-SINRs, then N first L1-SINRs are selected from the multiple first L1-SINRs, and N second L1-SINRs are selected from the multiple second L1-SINRs, and the N first L1-SINRs and N second L1-SINRs are sent to the base station; or, 2N L1-SINRs are selected from the multiple first L1-SINRs and multiple second L1-SINRs, and the 2N L1-SINRs are sent to the base station.

25. The apparatus according to claim 23, characterized in that, When the transmitting module measures the CSI-RS received from the first portion of the second type of CSI-RS resources to obtain the first channel state information, it is specifically used for: If the first part of the second type of CSI-RS resources corresponds to at least one CSI subband, for each CSI subband, if the CSI subband completely overlaps with the uplink subband or guard subband of the SBFD symbol, then the measurement of the CSI-RS received by the CSI subband is prohibited. If the CSI subband does not overlap with the uplink subband or guard subband of the SBFD symbol, then the CSI-RS received by the CSI subband is measured to obtain the measurement result of the CSI subband. If the CSI subband partially overlaps with the uplink subband or guard subband of the SBFD symbol, then measurement of the CSI-RS received by the CSI subband is prohibited; or, the determination of whether to measure the CSI-RS received by the CSI subband is based on the size of the non-overlapping resources of the CSI subband. If yes, the CSI-RS received by the CSI subband is measured to obtain the measurement result of the CSI subband; if no, measurement of the CSI-RS received by the CSI subband is prohibited. The first channel state information is determined based on the measurement results of each CSI sub-band.

26. The apparatus according to claim 25, characterized in that, The first receiving module is further configured to receive first indication information sent by the base station; wherein the first indication information is configured to indicate that CSI-RS transmission based on the first part of the second type of CSI-RS resources and the second part of the second type of CSI-RS resources is prohibited, or, configured to indicate that CSI-RS transmission based on the first part of the second type of CSI-RS resources is prohibited, and CSI-RS transmission based on the second part of the second type of CSI-RS resources is prohibited. If the first indication information is used to indicate the transmission of CSI-RS based on the first part of the second type of CSI-RS resources and to prohibit the transmission of CSI-RS based on the second part of the second type of CSI-RS resources, the first receiving module is further used to receive the second indication information sent by the base station; The second indication information is used to indicate that CSI-RS received by a CSI subband that overlaps with the uplink subband or the guard subband should be prohibited from being measured, or to indicate whether to measure CSI-RS received by a CSI subband based on the size of the non-overlapping resources of the CSI subband.

27. The apparatus according to claim 23, characterized in that, The transmitting module is further configured to, after receiving CSI-RS transmitted by the base station based on the first type of CSI-RS resource in the first CSI-RS resource set, measure the CSI-RS received by the first type of CSI-RS resource to obtain second channel state information, and send the second channel state information to the base station; The first channel state information and the second channel state information are sent to the base station using different uplink resources; or, the first channel state information and the second channel state information are sent to the base station using the same uplink resources.

28. The apparatus according to claim 21, characterized in that, The third type of CSI-RS resources only include resources located in the downlink subband of the SBFD symbol; wherein: If the third type of CSI-RS resource only occupies continuous resources in the downlink subband, then the second resource configuration information includes the starting position of the RB and the number of RBs occupied corresponding to the continuous resource; If the third type of CSI-RS resource occupies two non-contiguous resources in the downlink subband, then the second resource configuration information includes the RB start position and RB occupancy number corresponding to the two resources respectively.

29. The apparatus according to claim 28, characterized in that, The starting position of the RB corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied by the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied by the third type of CSI-RS resource is an integer multiple of the first value. or, The starting position of the RB corresponding to the third type of CSI-RS resource is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resource is any value; Wherein, if the capability parameter of the user equipment indicates that it has the capability to support any RB start position, then the RB start position corresponding to the third type of CSI-RS resource is the start position of the downlink subband of the SBFD symbol, and the number of RBs occupied corresponding to the third type of CSI-RS resource is any value; If the capability parameters of the user equipment indicate that it does not have the capability to support arbitrary RB start positions, then the RB start position corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is an integer multiple of the first value.

30. The apparatus according to any one of claims 20-29, characterized in that, The first receiving module is further configured to receive third indication information sent by the base station, the third indication information being used to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is permitted, or to indicate that downlink data transmission outside the downlink subband of the SBFD symbol is not permitted; and / or, The first receiving module is further configured to receive a fourth indication information sent by the base station, the fourth indication information being used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is permitted, or to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is not permitted.

31. A CSI-RS transmission device, characterized in that, Applied to base stations, including: A first transmitting module is configured to transmit resource configuration information corresponding to a CSI-RS resource set to a user equipment. The resource configuration information indicates the CSI-RS resource set used by the user equipment, and the CSI-RS resource set includes CSI-RS resources located in SBFD symbols. The CSI-RS resources either exceed the downlink subband range of the SBFD symbol or are located within the downlink subband of the SBFD symbol. If the user equipment corresponds to a first CSI-RS resource set, then first resource configuration information corresponding to the first CSI-RS resource set is transmitted to the user equipment. The first CSI-RS resource set includes a first type of CSI-RS resources located in ordinary symbols and a second type of CSI-RS resources located in SBFD symbols, and the second type of CSI-RS resources exceed the downlink subband range of the SBFD symbol. The second sending module is configured to send CSI-RS to the user equipment based on the CSI-RS resources in the CSI-RS resource set, so that the user equipment can receive CSI-RS based on the CSI-RS resources in the CSI-RS resource set.

32. The apparatus according to claim 31, characterized in that, When the first sending module sends the resource configuration information corresponding to the CSI-RS resource set to the user equipment, it is specifically used for: If the user equipment corresponds to a second CSI-RS resource set and a third CSI-RS resource set, then send the second resource configuration information corresponding to the second CSI-RS resource set and the third resource configuration information corresponding to the third CSI-RS resource set to the user equipment; wherein, the second CSI-RS resource set includes third-type CSI-RS resources located in SBFD symbols, and the third-type CSI-RS resources are located in the downlink subband of the SBFD symbols, and the third CSI-RS resource set includes fourth-type CSI-RS resources located in ordinary symbols.

33. The apparatus according to claim 32, characterized in that, If the second type of CSI-RS resources includes a first portion of resources located in the downlink subband of an SBFD symbol and a second portion of resources located in the uplink subband or guard subband of an SBFD symbol, the second transmitting module, when transmitting CSI-RS to the user equipment based on the CSI-RS resources in the CSI-RS resource set, specifically performs the following: transmitting CSI-RS to the user equipment based on the second type of CSI-RS resources in the first CSI-RS resource set; wherein... If downlink data transmission outside the downlink subband of the SBFD symbol is permitted, then CSI-RS is transmitted based on the first and second portions of the second type of CSI-RS resources; Alternatively, if downlink data transmission outside the downlink subband of the SBFD symbol is not permitted, then CSI-RS transmission based on the first and second portions of the second type of CSI-RS resources is prohibited; or, CSI-RS transmission based on the first portion of the second type of CSI-RS resources is permitted, and CSI-RS transmission based on the second portion of the second type of CSI-RS resources is prohibited.

34. The apparatus according to claim 33, characterized in that, The first sending module is further configured to send first indication information to the user equipment; wherein the first indication information is configured to indicate that CSI-RS transmission based on the first part of the second type of CSI-RS resources and the second part of the second type of CSI-RS resources is prohibited, or, configured to indicate that CSI-RS transmission based on the first part of the second type of CSI-RS resources is prohibited, and CSI-RS transmission based on the second part of the second type of CSI-RS resources is prohibited. If the first indication information is used to indicate the transmission of CSI-RS based on the first part of the second type of CSI-RS resources and to prohibit the transmission of CSI-RS based on the second part of the second type of CSI-RS resources, the first sending module is further used to send the second indication information to the user equipment. The second indication information is used to indicate that CSI-RS received by a CSI subband that overlaps with the uplink subband or the guard subband should be prohibited from being measured, or to indicate whether to measure CSI-RS received by a CSI subband based on the size of the non-overlapping resources of the CSI subband.

35. The apparatus according to claim 32, characterized in that, The third type of CSI-RS resources only include resources located in the downlink subband of the SBFD symbol; wherein: If the third type of CSI-RS resource only occupies continuous resources in the downlink subband, then the second resource configuration information includes the starting position of the RB and the number of RBs occupied corresponding to the continuous resource; If the third type of CSI-RS resource occupies two non-contiguous resources in the downlink subband, then the second resource configuration information includes the RB start position and RB occupancy number corresponding to the two resources respectively.

36. The apparatus according to claim 35, characterized in that, The starting position of the RB corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied by the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied by the third type of CSI-RS resource is an integer multiple of the first value. or, The starting position of the RB corresponding to the third type of CSI-RS resource is the starting position of the downlink subband of the SBFD symbol, and the number of RBs occupied by the third type of CSI-RS resource is any value; Wherein, if the capability parameter of the user equipment indicates that it has the capability to support any RB start position, then the RB start position corresponding to the third type of CSI-RS resource is the start position of the downlink subband of the SBFD symbol, and the number of RBs occupied corresponding to the third type of CSI-RS resource is any value; If the capability parameters of the user equipment indicate that it does not have the capability to support arbitrary RB start positions, then the RB start position corresponding to the third type of CSI-RS resource is an integer multiple of the first value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is greater than or equal to the second value, and the number of RBs occupied corresponding to the third type of CSI-RS resource is an integer multiple of the first value.

37. The apparatus according to any one of claims 31-36, characterized in that, The first transmitting module is further configured to transmit third indication information to the user equipment, wherein the third indication information is used to indicate that transmission of downlink data outside the downlink subband of the SBFD symbol is permitted, or to indicate that transmission of downlink data outside the downlink subband of the SBFD symbol is not permitted; and / or, The first transmitting module is further configured to transmit fourth indication information to the user equipment, wherein the fourth indication information is used to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is permitted, or to indicate that uplink data transmission outside the uplink subband of the SBFD symbol is not permitted.

38. The apparatus according to claim 33, characterized in that, When the second sending module sends CSI-RS based on the first portion of the resources of the second type of CSI-RS resources, and prohibits sending CSI-RS based on the second portion of the resources of the second type of CSI-RS resources, it is specifically used for: The target transmit power is determined based on the maximum transmit power of the second type of CSI-RS resources; or, the target transmit power is determined based on the maximum transmit power and resource ratio of the second type of CSI-RS resources, wherein the resource ratio is the ratio of the first part of resources to the second type of CSI-RS resources. At the target transmit power, CSI-RS is transmitted based on the first portion of resources.

39. A user equipment, characterized in that, include: A processor and a machine-readable storage medium, the machine-readable storage medium storing machine-executable instructions that can be executed by the processor; The processor is configured to execute machine-executable instructions to implement the method according to any one of claims 1-11.

40. A base station, characterized in that, include: A processor and a machine-readable storage medium, the machine-readable storage medium storing machine-executable instructions that can be executed by the processor; The processor is configured to execute machine-executable instructions to implement the method of any one of claims 12-19.

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