CN119011042A

CN119011042A - Channel measurement method and communication device

Info

Publication number: CN119011042A
Application number: CN202310578670.0A
Authority: CN
Inventors: 高君慧; 叶宸成; 王潇涵
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2023-05-19
Filing date: 2023-05-19
Publication date: 2024-11-22
Also published as: WO2024239931A1

Abstract

The present application provides a channel measurement method and a communication device, which can solve the problem of inconsistent channels in multiple CSI-RS measurements, thereby improving the accuracy of channel state information CSI reports, and can be applied to communication systems. The method includes: a terminal device receives first information from a network device, and multiple channel state information reference signals CSI-RS, and reports CSI based on the measurement results of multiple CSI-RS. The first information is used to trigger the reporting of the CSI report. Multiple CSI-RS occupy the same CSI-RS resources, and the ports corresponding to the same port index of any two CSI-RS in the multiple CSI-RS are the same.

Description

Channel measurement method and communication device

Technical Field

The present application relates to the field of communications, and in particular, to a channel measurement method and a communication device.

Background

In the feedback based on the doppler codebook, channel state information feedback based on the result of a plurality of measurements is required. For periodic (periodic) channel state information reference signals (CHANNEL STATE information REFERENCE SIGNAL, CSI-RS) and semi-persistent (semi-persistent) CSI-RS, multiple CSI-RS measurements are required in the process of performing doppler codebook feedback. In this way, the channels of multiple CSI-RS measurements may be inconsistent, thus resulting in inaccurate doppler information measurements and thus inaccurate CSI.

Disclosure of Invention

The embodiment of the application provides a channel measurement method and a communication device, which can solve the problem of inconsistent channels of multiple CSI-RS measurements, thereby improving the accuracy of channel state information measurement.

In order to achieve the above purpose, the application adopts the following technical scheme:

In a first aspect, a channel measurement method is provided. The channel measurement method comprises the following steps: the terminal equipment receives the first information from the network equipment and a plurality of channel state information reference signals (CSI-RS), and reports the CSI according to the measurement results of the plurality of CSI-RSs. The first information is used for triggering reporting of Channel State Information (CSI). The plurality of CSI-RSs occupy the same CSI-RS resource, and the ports corresponding to the same port index of any two CSI-RSs in the plurality of CSI-RSs are the same.

Based on the method provided in the first aspect, the terminal device may report CSI according to measurement results of the CSI-RS after receiving the first information for triggering CSI reporting and receiving the multiple CSI-RS. Because the ports corresponding to the same port index of any two CSI-RSs in the plurality of CSI-RSs are the same, the ports corresponding to the same index of different CSI-RSs can correspond to the same angle time delay pair, so that Doppler information can be more accurate, and the accuracy of the CSI can be improved.

In one possible design, the CSI-RS resource may be a periodic CSI-RS resource or a semi-persistent CSI-RS resource.

In one possible design, the ports corresponding to the same port index of any two CSI-RS in the plurality of CSI-RS are the same, including: and within a first time length after the end time of the first information, the ports corresponding to the same port index of any two CSI-RSs in the plurality of CSI-RSs are the same. In this way, the CSI measurement of the codebooks other than the doppler codebook can be configured outside the first time length after the end time of the first information, so that the configuration flexibility of the CSI-RS can be improved.

Optionally, the first time length is a time length between an end time of receiving the first information and an end time of the at least two CSI measurements.

Optionally, the first time length is a time length between an end time of receiving the first information and a start time of the reference resource, where the start time of the reference resource is determined according to a second time length, and the second time length is a time length between an end time of the CSI-RS resource and a start time of reporting the CSI. In this way, the ports corresponding to the same port index of the reference signal for CSI-RS measurement are the same, so that the precision of the CSI is further improved.

Optionally, the first time length is a time length between an end time of receiving the first information and a start time of reporting the CSI. In this way, the ports corresponding to the same port index of the reference signal for CSI-RS measurement are the same, so that the precision of the CSI is further improved.

In a second aspect, a channel measurement method is provided. The channel measurement method comprises the following steps: the network device sends the first information and the plurality of CSI-RSs to the terminal device and receives the CSI from the terminal device. The first information is used for triggering reporting of Channel State Information (CSI). The plurality of channel state information reference signals (CSI-RS) occupy the same CSI-RS resource, and the ports corresponding to the same port indexes of any two CSI-RSs in the plurality of CSI-RSs are the same. Wherein, the CSI is determined by the terminal equipment according to a plurality of CSI-RSs.

In one possible design, the ports corresponding to the same port index of any two CSI-RS in the plurality of CSI-RS are the same, including: and within a first time length after the end time of the first information, the ports corresponding to the same port index of any two CSI-RSs in the plurality of CSI-RSs are the same.

Optionally, the first time length is a time length between an end time of transmitting the first information and an end time of at least two CSI measurements.

Optionally, the first time length is a time length between an end time of sending the first information and a start time of the reference resource, where the start time of the reference resource is determined according to a second time length, and the second time length is a time length between an end time of the CSI-RS resource and a start time of reporting the CSI.

Optionally, the first time length is a time length between an end time of transmitting the first information and a start time of reporting the CSI.

In addition, the technical effects of the method of the second aspect may refer to the technical effects of the method of the first aspect, which are not described herein.

In a third aspect, a channel measurement method is provided. The channel measurement method comprises the following steps: the terminal device receives CSI-RS from the network device on a channel measurement resource CMR and receives interference measurement signals from the network device on an interference measurement resource IMR. The end time of the interference measurement signal is located before the time domain position of the first reference resource, the end time of the CSI-RS is located before the time domain position of the second reference resource, and the time domain position of the first reference resource is located after the time domain position of the second reference resource. And the terminal equipment sends Channel State Information (CSI) according to the CSI-RS and the interference measurement signal.

Based on the method provided in the third aspect, the end time of the interference signal received by the terminal device, for example, before the time domain position of the first reference resource, the end time of the CSI-RS, for example, before the time domain position of the second reference resource, sends CSI according to the CSI-RS and the interference measurement signal, so that the time between the receiving of the interference signal and the reporting of the CSI by the terminal device is shorter than the time between the receiving of the channel measurement signal and the reporting of the CSI, thereby obtaining a more accurate interference measurement result.

In one possible design, the time length between the time domain position of the first reference resource and the starting time of reporting the CSI is a preset time length. The time length between the time domain position of the second reference resource and the starting time of reporting the CSI is related to the measurement times of the CSI-RS and/or the number of time domain units of reporting the PMI.

In a fourth aspect, a channel measurement method is provided. The channel measurement method comprises the following steps: the network device sends CSI-RS to the terminal device on the channel measurement resource CMR and sends interference measurement signals to the terminal device on the interference measurement resource IMR. The end time of the interference measurement signal is located before the time domain position of the first reference resource, the end time of the CSI-RS is located before the time domain position of the second reference resource, and the time domain position of the first reference resource is located after the time domain position of the second reference resource. The network device receives channel state information CSI.

Further, the technical effects of the method described in the fourth aspect may refer to the technical effects of the method described in the third aspect, and are not described herein.

In a fifth aspect, a communication device is provided. The communication device is configured to perform the method according to any one of the implementation manners of the first aspect to the fourth aspect.

In the present application, the communication apparatus according to the fifth aspect may be the terminal device according to any one of the first aspect, the third aspect, or the network device according to any one of the second aspect, the fourth aspect, or a chip (system) or other part or component that may be disposed in the terminal device or the network device, or an apparatus that includes the terminal device or the network device.

It should be understood that the communication apparatus according to the fifth aspect includes corresponding modules, units or means (means) for implementing the method according to any one of the first to fourth aspects, where the modules, units or means may be implemented by hardware, software or implemented by hardware executing corresponding software. The hardware or software comprises one or more modules or units for performing the functions involved in the methods described above.

In a sixth aspect, a communication device is provided. The communication device includes: a processor for performing the method according to any one of the possible implementation manners of the first aspect to the fourth aspect.

In one possible configuration, the communication device according to the sixth aspect may further comprise a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be for use in a communication device according to the sixth aspect to communicate with other communication devices.

In one possible configuration, the communication device according to the sixth aspect may further comprise a memory. The memory may be integral with the processor or may be separate. The memory may be used for storing computer programs and/or data related to the method according to any of the first to fourth aspects.

In the present application, the communication apparatus according to the sixth aspect may be the terminal device according to any one of the first aspect, the third aspect, or the network device according to any one of the second aspect, the fourth aspect, or a chip (system) or other part or component that may be disposed in the terminal device or the network device, or an apparatus that includes the terminal device or the network device.

In a seventh aspect, a communication device is provided. The communication device includes: a processor coupled to the memory, the processor configured to execute a computer program stored in the memory, to cause the communication device to perform the method according to any one of the possible implementation manners of the first to fourth aspects.

In one possible configuration, the communication device according to the seventh aspect may further comprise a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be for use in a communication device according to the seventh aspect to communicate with other communication devices.

In the present application, the communication apparatus according to the seventh aspect may be the terminal device according to any one of the first aspect, the third aspect, or the network device according to any one of the second aspect, the fourth aspect, or a chip (system) or other part or component that may be disposed in the terminal device or the network device, or an apparatus that includes the terminal device or the network device.

An eighth aspect provides a communication apparatus comprising: a processor and a memory; the memory is configured to store a computer program which, when executed by the processor, causes the communication device to perform the method according to any one of the implementation manners of the first to fourth aspects.

In one possible configuration, the communication device according to the eighth aspect may further comprise a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be for use in a communication device according to the eighth aspect to communicate with other communication devices.

In the present application, the communication apparatus according to the eighth aspect may be the terminal apparatus according to any one of the first aspect, the third aspect, or the network apparatus according to any one of the second aspect, the fourth aspect, or a chip (system) or other part or component that may be disposed in the terminal apparatus or the network apparatus, or an apparatus that includes the terminal apparatus or the network apparatus.

In a ninth aspect, there is provided a communication apparatus comprising: a processor; the processor is configured to perform the method according to any one of the implementation manners of the first to fourth aspects according to a computer program after being coupled to the memory and reading the computer program in the memory.

In one possible configuration, the communication device according to the ninth aspect may further comprise a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be for use in a communication device according to the ninth aspect to communicate with other communication devices.

In the present application, the communication apparatus according to the ninth aspect may be the terminal device according to any one of the first aspect, the third aspect, or the network device according to any one of the second aspect, the fourth aspect, or a chip (system) or other part or component that may be disposed in the terminal device or the network device, or an apparatus that includes the terminal device or the network device.

In a tenth aspect, a processor is provided. Wherein the processor is configured to perform the method according to any one of the possible implementation manners of the first aspect to the fourth aspect.

In an eleventh aspect, a communication system is provided. The communication system includes one or more terminal devices, and one or more network devices.

In a twelfth aspect, there is provided a computer-readable storage medium comprising: computer programs or instructions; the computer program or instructions, when run on a computer, cause the computer to perform the method of any one of the possible implementations of the first to fourth aspects.

In a thirteenth aspect, there is provided a computer program product comprising a computer program or instructions which, when run on a computer, cause the computer to perform the method of any one of the possible implementations of the first to fourth aspects.

Further, the technical effects of the communication device according to the fifth to thirteenth aspects may refer to the technical effects of the method according to the first to fourth aspects, and are not described herein.

Drawings

Fig. 1 is a schematic flow chart of CSI measurement according to an embodiment of the present application;

fig. 2 is a schematic diagram of CSI and CSI resource relationship provided in an embodiment of the present application;

Fig. 3 is a schematic diagram of CSI computation delay according to an embodiment of the present application;

Fig. 4 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 5 is a schematic architecture diagram of a network device according to an embodiment of the present application;

fig. 6 is a schematic diagram of information interaction between a network device and a terminal device according to an embodiment of the present application;

fig. 7 is a flowchart of a channel measurement method according to an embodiment of the present application;

Fig. 8 is a schematic diagram of a relationship between ports of different CSI-RS according to an embodiment of the present application;

fig. 9 is a second schematic flow chart of a channel measurement method according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application;

Fig. 11 is a schematic diagram of a second structure of a communication device according to an embodiment of the present application.

Detailed Description

In order to facilitate understanding of the embodiments of the present application, the following first describes techniques and technical terms related to the embodiments of the present application.

1. Time domain symbols (symbols), which may also be referred to simply as symbols. In the embodiment of the application, the time domain symbol may be an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol, or may be a discrete Fourier transform spread-spectrum OFDM (discrete fourier transform-spread-OFDM, DFT-s-OFDM) symbol.

2. Time domain unit: one time domain unit may include one or more slots (slots), or one or more time domain symbols, such as OFDM symbols. The time length of one slot is different at different subcarrier spacings (sub-CARRIER SPACING, SCS). The larger the subcarrier spacing, the smaller the time length of the time slot; the smaller the subcarrier spacing, the greater the time length of the slot. For ease of understanding, in the following embodiments, a time slot is included in a time domain unit for illustration, and will not be described in detail. It is understood that the time domain units may also be divided according to other time granularity, which is not described herein.

3. Ports (ports), i.e. transmitting antenna ports, i.e. antenna ports on the device transmitting the signals for transmitting the signals. Ports are associated with time domain resources, frequency domain resources, and code domain resources. The two ports may be the same or different. The two ports are identical, and may be the same time domain resource, frequency domain resource, and code domain resource of both ports. The two port differences may be one or more of the following differences of the two ports: time domain resources, frequency domain resources, code domain resources.

It may be understood that, in the embodiment of the present application, the port refers to a transmitting antenna port of the network device without specific description.

4. In a communication system, the application of massive multi-antenna technology can improve the spectral efficiency of the communication system. When the MIMO technology is adopted, when the network device, such as a base station, transmits data to the terminal device, modulation coding and signal precoding are required. And modulation coding and signal precoding need to rely on channel state information (CHANNEL STATE information reference, CSI) fed back by the terminal device to the network device. The CSI measurement process may be performed between the terminal device and the network device to feed back CSI, where the CSI is carried in the CSI report.

Referring to fig. 1, fig. 1 is a flowchart of a network device and a terminal device for CSI measurement according to an embodiment of the present application, where, as shown in fig. 1, the CSI measurement flow includes steps S101 to S104 as follows:

S101, the network equipment sends channel measurement configuration information to the terminal equipment.

The channel measurement configuration information is used for indicating channel measurement and configuration parameters for channel measurement, such as time domain resources, frequency domain resources and the like. The channel measurement configuration information may include, for example, channel measurement resources (resources for channel measurement, CMR), or further include interference measurement resources (resources for interference measurement, IMR) corresponding to the CMR, or the like.

S102, the network equipment sends a channel state information reference signal (CHANNEL STATE information REFERENCE SIGNAL, CSI-RS) to the terminal equipment. Correspondingly, the terminal device receives the CSI-RS from the network device.

In the new radio, NR, the network device transmits the CSI-RS for the terminal device to detect the downlink channel, and the terminal device receives the CSI-RS on the pre-configured CMR for channel estimation. In addition, the terminal device may also receive interference measurement signals on the preconfigured IMR for performing interference measurements. And the terminal equipment calculates to obtain the final CSI reporting amount according to the measurement results on the CMR and the IMR. Wherein, a process including the following steps may be referred to as a CSI calculation process: and the terminal equipment measures the CSI-RS on the CMR and obtains the process of the CSI reporting quantity. Wherein, the CSI reporting amount may include: a channel Rank Indicator (RI) for determining a number of streams in which the network device transmits data to the terminal device; and can further include a channel state indication (channel quality indicator, CQI) (determined together according to the CSI-RS measurement and the interference measurement) for determining a modulation order of the network device to transmit data to the terminal device and a code rate of the channel coding; a PMI may also be included for determining a precoding for the network device to transmit data to the terminal device. It is understood that CSI includes a CSI report amount, and thus, CSI includes information in the CSI report amount.

The CSI calculation process includes a PMI calculation process.

The CSI-RS resource may be a non-zero power channel state information (NZP CSI-RS) resource, which is non-zero power CHANNEL STATE information REFERENCE SIGNAL.

And S103, the terminal equipment reports the CSI to the network equipment according to the measurement result of the CSI-RS.

It is understood that CSI is determined by the terminal device based on measurements on the CMR and IMR.

The IMR may include CSI-RS resources (e.g., NZP CSI-RS resources), and/or channel state information-interference measurement (CHANNEL STATE information REFERENCE SIGNAL-INTERFERENCE MEASUREMENT, CSI-IM) resources, among others.

In the CSI measurement and feedback procedure, the method provided in fig. 1 may further include S104.

And S104, the network equipment sends data according to the CSI reported by the terminal equipment.

In the flow shown in fig. 1, the CMR (abbreviated as CSI-RS resource) for transmitting CSI-RS and the IMR for transmitting interference measurement signals may be periodic, semi-continuous, or aperiodic. Both periodic/semi-persistent/aperiodic CSI-RS resources and CSI interference measurement resources are configured to the terminal device through higher layer signaling. For periodic CSI-RS resources, they are configured by the network device to the terminal device through radio resource control (radio resource control, RRC) signaling, including the periodicity of the CSI-RS resources.

In addition, CSI reporting may also be periodic, semi-persistent, or aperiodic. The following description will be given respectively:

(1) Periodic CSI reporting (periodic CSI reporting, P-CSI): the network equipment performs periodical CSI reporting for the terminal equipment configuration through a higher layer signaling (RRC signaling), and the terminal equipment performs channel measurement based on periodical CSI-RS resources and sends CSI according to a fixed time interval (i.e., the period of CSI reporting configured by the network equipment).

(2) Semi-persistent CSI reporting (SP-CSI), which may also be referred to as semi-periodic CSI reporting, or semi-static CSI reporting. In the semi-continuous CSI reporting, when the terminal device is configured to perform the semi-continuous CSI reporting, the terminal device starts to perform the CSI reporting after receiving the downlink activation signaling sent by the network device, and ends the CSI reporting after receiving the downlink deactivation signaling. And between the two downlink signaling issuing moments, the terminal equipment performs periodical CSI measurement and report. The CSI-RS resources used for semi-persistent CSI reporting may be periodic or semi-persistent. Semi-persistent CSI reporting may be performed on PUCCH resources, where the network device activates and deactivates the semi-persistent CSI reporting through downlink higher layer signaling (MAC CE signaling); or semi-persistent CSI reporting may also be performed on Physical Uplink SHARE CHANNEL (PUSCH) resources, where the network device activates and deactivates the semi-persistent CSI reporting by using physical layer downlink control information (downlink control information, DCI).

(3) Aperiodic CSI reporting (aperiodic CSI reporting, AP-CSI): the aperiodic CSI reporting and measurement process is as follows: the network equipment firstly configures a plurality of configuration parameters of CSI reporting for the terminal equipment through a downlink RRC signaling semi-static state, one or more of the CSI reporting is triggered through DCI, the terminal equipment performs CSI measurement according to the configuration parameters of the CSI reporting, and the PUSCH is used for sending the CSI. It should be noted that: although aperiodic CSI measurement and CSI reporting, like semi-persistent CSI measurement and CSI reporting, require network device triggering, aperiodic CSI measurement and CSI reporting do not require deactivation after DCI triggering. The CSI-RS resources used for aperiodic CSI reporting may be periodic, semi-persistent, or aperiodic.

In an actual communication system, there is a time delay in the feedback of CSI, that is, there is a time delay between the reported CSI and the actually measured CSI, so that there is a problem that the CSI expires. This problem can lead to significant performance loss in a scenario where the terminal device is moving at high speed. Where CSI expiration is essentially due to the time-varying nature of the channel, corresponding to doppler changes. In conventional CSI based on Type II codebook, PMI generally includes two dimensions of a space domain (corresponding to an angle domain) and a frequency domain (corresponding to a time delay domain).

In a Type two (Type II) doppler (doppler) codebook (which may also be referred to as a mobility enhancement codebook) discussed by the third generation partnership project (3rd generation partnership project,3GPP), a new doppler domain is introduced, where the PMI corresponding to the doppler codebook indicates a precoding matrix of three dimensions of the spatial domain, the frequency domain, and the doppler domain (i.e., the time domain). Wherein the number of doppler domain dimensions is the number of time domain units. To enable CSI feedback based on the Type II doppler codebook, multiple CSI-RS based channel measurements (i.e., CSI-RS measurements) need to be made to obtain doppler information. The CSI-RS measured by the CSI-RS of multiple times occupy the same CSI-RS resource, which can be said to be the same CSI-RS resource.

In the 3GPP protocol, the channel measurement resource allocation scheme for CSI measurement of the Type II doppler codebook includes the following three schemes:

(1) Periodic CSI-RS: and configuring 1 CSI-RS resource through RRC signaling, wherein a plurality of CSI-RSs which can be transmitted on the same CSI-RS resource form a CSI-RS cluster (burst) at a plurality of moments.

(2) Semi-persistent CSI-RS: the configuration method is the same as the periodic CSI-RS method, except that a plurality of CSI-RS (CSI-RS clusters) configured based on semi-persistent CSI-RS can be activated and deactivated.

(3) Aperiodic CSI-RS: a set of aperiodic CSI-RS resources with different slot offsets is activated as channel measurement resources for CSI measurement of a Type II Doppler codebook.

Each CSI-RS corresponds to one CSI-RS measurement time, and channel measurement can be performed at each CSI-RS measurement time. It is appreciated that CSI-RS measurement occasions may also be referred to as CSI-RS measurement occasions.

Therefore, it can be known that, in the above three schemes, the channel measurement resources for CSI measurement of the Type II doppler codebook correspond to multiple CSI-RS measurement moments. For periodic CSI-RS and semi-continuous CSI-RS, the CSI-RS on a plurality of CSI-RS measurement moments belong to the same CSI-RS resource, and the time length of a measurement interval between two adjacent CSI-RS measurement moments is the time length of a measurement period on the CSI-RS resource; for aperiodic CSI-RS, the CSI-RS at each of the plurality of CSI-RS measurement instants belongs to a single CSI-RS resource, and the measurement interval m between two adjacent CSI-RS measurement instants is the difference between the slot offsets of the two adjacent aperiodic CSI-RS resources. After the CSI measurement resources are allocated to the terminal device, the terminal device needs to receive CSI-RS at each of multiple CSI-RS measurement moments, estimate to obtain spatial base vector and frequency domain base vector related channel information, predict channels based on the channel information of the multiple CSI-RS measurement moments, and quantize and compress the predicted channels based on a three-dimensional codebook of spatial domain-frequency domain-doppler domain, so as to feed back CSI.

The relationship between CSI-RS and CSI on the same CSI-RS resource is exemplified below. Fig. 2 shows an example of CSI based on doppler information, where one CSI-RS resource includes 8 CSI-RS, and the terminal device may measure the 8 CSI-RS, obtain the doppler information, and predict a channel or PMI at a subsequent time, so as to obtain the CSI. Among CSI-RS corresponding to the same CSI-RS resource, each CSI-RS corresponds to a plurality of ports, which may also be said to be configured for each CSI-RS measurement.

Wherein, each port of the CSI-RS corresponds to 1 spatial domain vector (angle delay pair), and it is accurate to measure doppler information at the same port (under the same angle delay pair). In order to ensure the accuracy of the Doppler codebook calculation, the number of ports of each CSI-RS in the plurality of CSI-RSs is required to be the same, and two ports with the same port index in the plurality of CSI-RSs are required to be the same.

It is understood that two adjacent CSI-RS measurement instants refer to that for one CSI-RS, there are no other CSI-RS measurement instants between the two CSI-RS measurement instants.

In some embodiments, for aperiodic CSI-RS, the CSI-RS at each CSI-RS measurement time instant belongs to a separate one of the CSI-RS resources. In the aperiodic CSI-RS, the number of ports of each CSI-RS resource on the plurality of CSI-RS resources is the same, and two ports with the same port index in the plurality of CSI-RS are the same.

However, for periodic CSI-RS and semi-persistent CSI-RS, there is no explicit restriction on ports corresponding to the same port index at different CSI-RS measurement times for the same CSI-RS resource. When ports corresponding to the same port index are different under different CSI-RS measurement moments of the same CSI-RS resource, angle delay pairs corresponding to the same port index are different, and therefore accurate calculation of the CSI based on the Doppler codebook is difficult to achieve.

In addition, for semi-continuous CSI reporting or aperiodic CSI reporting, after receiving the corresponding DCI, the terminal device starts channel estimation and channel state information calculation, and reports channel state information. For the terminal device to have enough time to determine and feed back CSI, two delay parameters Z and Z' are defined in NR Rel-15, as well as CSI reference resources. The value of Z is preset and related to the CSI reporting type and the subcarrier interval, and represents the minimum number of symbols between the last symbol (symbol) of the physical downlink control channel (physical downlink control channel, PDCCH) triggering the CSI reporting and the first symbol of the uplink data channel for carrying the CSI, which may also be said to be the minimum number of symbols between the end time of the DCI triggering the CSI reporting and the start time of the CSI reporting. Z' represents a time interval between an end time of receiving the CSI-RS and a start time of reporting the CSI. For example, it may be the minimum number of symbols from the last symbol of the CSI-RS resource currently being used to calculate CSI to the first symbol of the uplink data channel used to carry CSI. As illustrated in fig. 3, assuming that the end time of DCI is T1, the end time of the last symbol of the CSI-RS resource currently used to calculate CSI is T2, and the start time of the first symbol of the uplink data channel for carrying CSI is T3, then z=t3-T1, and Z' =t2-T1.

It will be appreciated that Z 'for different configuration parameters μmay be different and Z' for different configuration parameters μmay be different.

The corresponding relationship between the CSI computation delay and the configuration parameter μ for the Type II codebook in the current protocol is shown in table 1 below.

TABLE 1

Where μ is a configuration parameter corresponding to a subcarrier spacing. Different configuration parameters correspond to different subcarrier spacings. The relationship between the subcarrier spacing and the value of the configuration parameter μ is shown in table 2 below:

TABLE 2

And the time domain positions of the CSI reference resources and the CSI reference resources are positioned in a plurality of time slots before the time slot where the CSI is positioned, and the CSI comprises the CSI measured on the CMR and the IMR before the CSI reference resources associated with the CSI. The time domain positions of the CSI reference resources corresponding to the CMR and the IMR of the CSI are the same. Illustratively, the time domain position corresponding to the uplink resource used by one CSI is reported as n', and then the time domain position of the CSI reference resource of this CSI is reported as n-n _ref, whereMu _DL and mu _UL are determined from a set of parameters (Numerology) configured on the network side. Mu _DL denotes a downlink subcarrier spacing configuration parameter, for example, if the downlink subcarrier spacing is 15kHz, then mu _DL =0. If the downlink subcarrier spacing is 30kHz, μ _DL =1. If the downlink subcarrier spacing is 60kHz, μ _DL =2. If the downlink subcarrier spacing is 120kHz, μ _DL =3. Similar to μ _DL, μ _DL represents an uplink subcarrier spacing configuration parameter. Where n _ref relates to the type of CSI reporting. For example, for periodic CSI reporting or semi-persistent CSI reporting, if the CSI-RS resources for channel measurement bundled by this CSI reporting are 1, then n _ref is greater than or equal toThe time slot with time domain position n-n _ref is the smallest integer of the valid downlink time slot. For periodic CSI reporting or semi-persistent CSI reporting, if the number of CSI-RS resources bundled for channel measurement in this CSI reporting is greater than 1, then n _ref is greater than or equal toN-n _ref is the smallest integer of the valid downstream time slots. For aperiodic CSI reporting, when the terminal device is triggered to report aperiodic CSI reporting and DCI triggering the aperiodic CSI reporting are in the same time slot, then n _ref is a value that enables the CSI reference resource and the DCI to be in the same time slot. For other cases, such as the case where the aperiodic CSI report triggered to report is not in the same time slot as the DCI triggering the aperiodic CSI report, it is greater than or equal toAnd n-n _ref is the smallest integer of the valid downstream time slots. Wherein, To round down operators. It is understood that CSI reference resources may also be referred to as reference resources.

The effective downlink timeslot refers to a timeslot that at least contains 1 downlink symbol or flexible symbol (flexible symbol) configured at a higher layer, where the flexible symbol may perform downlink transmission or uplink transmission according to configuration of a network side, and the timeslot is not located in a measurement interval (measurement gap) configured at the network side, that is, between CSI measurements at two sides. The time domain position of the CSI reference resource may also be called a time domain position reference threshold for CSI measurement, etc., which is not limited in the embodiment of the present application.

For the traditional codebook (not the Type II codebook based on Doppler information), in each PMI estimation process, estimation and operation are carried out according to 1 CSI-RS to obtain space-domain and frequency-domain two-dimensional channel information, wherein the time domain positions of the CSI reference resource corresponding to the CMR and the CSI reference resource corresponding to the IMR in the CSI are the same, namely the Z 'corresponding to the CMR and the Z' corresponding to the IMR have the same value.

For the Type II codebook of 3GPP, each PMI estimation is estimated and calculated based on multiple CSI-RSs, and in addition, channel prediction and three-dimensional codebook calculation in the doppler domain are introduced. After the Doppler domain is introduced, the value of the configuration of Z' is smaller for the Type II codebook, and the PMI calculation time required by the terminal equipment under the values of different CSI-RS measurement times and time domain units is not considered, so that the terminal equipment can not support the operation of the PMI under the Doppler codebook easily, or the operation of the PMI under the Doppler codebook needs to be supported at high hardware cost. Therefore, in the discussion of 3GPP, the time domain location of the reference resource is modified for aperiodic CSI reporting of the Type II Doppler codebook. For example, for aperiodic CSI reporting of the Type II doppler codebook, the value of Z' may be determined according to at least one or more of: the number of CSI-RS measurement times and the number of time domain units. However, for IMR, since interference cannot be predicted and no correlation calculation in the doppler domain is required, the complexity of interference measurement by the terminal device is not increased. Assuming that the Z 'value of the IMR is the same as the Z' value of the CMR, the Z 'value corresponding to the IMR will be larger than the Z' value corresponding to the IMR in the existing protocol, that is, the distance from the time domain position of the signal for performing interference measurement to the time domain position reported by the CSI will be larger, so that the accuracy of the interference measurement result will be reduced.

The technical scheme of the application will be described below with reference to the accompanying drawings.

The technical solution of the embodiment of the present application may be applied to various communication systems, such as a wireless fidelity (WIRELESS FIDELITY, wiFi) system, a vehicle-to-object (vehicle to everything, V2X) communication system, an inter-device (device-todevie, D2D) communication system, a vehicle networking communication system, a 4th generation (4th generation,4G) mobile communication system, such as a long term evolution (long term evolution, LTE) system, a worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication system, a fifth generation (5th generation,5G) mobile communication system, such as a new radio, NR) system, and future communication systems, such as a sixth generation (6th generation,6G) mobile communication system, and the like.

The present application will present various aspects, embodiments, or features about a system that may include a plurality of devices, components, modules, etc. It is to be understood and appreciated that the various systems may include additional devices, components, modules, etc. and/or may not include all of the devices, components, modules etc. discussed in connection with the figures. Furthermore, combinations of these schemes may also be used.

In addition, in the embodiments of the present application, words such as "exemplary," "for example," and the like are used to indicate an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the term use of an example is intended to present concepts in a concrete fashion.

First, in the present application, "for indicating" may include both for direct indication and for indirect indication. When describing a certain "information" for indicating a, it may be included that the information indicates a directly or indirectly, and does not necessarily represent that a is carried in the information.

The information indicated by one information is called to-be-indicated information, and in a specific implementation process, various ways of indicating the to-be-indicated information exist, for example, but not limited to, the to-be-indicated information may be directly indicated, such as the to-be-indicated information itself or an index of the to-be-indicated information. The information to be indicated can also be indicated indirectly by indicating other information, wherein the other information and the information to be indicated have an association relation. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance. For example, the indication of the specific information may also be achieved by means of a pre-agreed (e.g., protocol-specified) arrangement sequence of the respective information, thereby reducing the indication overhead to some extent. And meanwhile, the universal part of each information can be identified and indicated uniformly, so that the indication cost caused by independently indicating the same information is reduced.

The specific indication means may be any of various existing indication means, such as, but not limited to, the above indication means, various combinations thereof, and the like. Specific details of various indications may be referred to the prior art and are not described herein. As can be seen from the above, for example, when multiple pieces of information of the same type need to be indicated, different manners of indication of different pieces of information may occur. In a specific implementation process, a required indication mode can be selected according to specific needs, and the selected indication mode is not limited in the embodiment of the present application, so that the indication mode according to the embodiment of the present application is understood to cover various methods that can enable a party to be indicated to learn information to be indicated.

The information to be indicated can be sent together as a whole or can be divided into a plurality of pieces of sub-information to be sent separately, and the sending periods and/or sending occasions of the sub-information can be the same or different. Specific transmission method the present application is not limited. The transmission period and/or the transmission timing of the sub-information may be predefined, for example, predefined according to a protocol, or may be configured by the transmitting end device by transmitting configuration information to the receiving end device. The configuration information may include, for example, but not limited to, one or a combination of at least two of RRC signaling, medium access control (medium access control, MAC) layer signaling, and physical layer signaling. Wherein the MAC layer signaling includes, for example, a MAC Control Element (CE); physical (PHY) layer signaling includes, for example, DCI.

Second, the first, second and various numerical numbers in the embodiments shown below are merely for convenience of description and are not intended to limit the scope of the embodiments of the present application. For example, different indication information is distinguished.

Third, "predefined" or "preconfiguration" may be implemented by pre-storing corresponding codes, tables, or other manners in which related information may be indicated in devices (e.g., including terminal devices and network devices), and the application is not limited to a particular implementation thereof. Where "save" may refer to saving in one or more memories. The one or more memories may be provided separately or may be integrated in an encoder or decoder, processor, or communication device. The one or more memories may also be provided separately as part of a decoder, processor, or communication device. The type of memory may be any form of storage medium, and the application is not limited in this regard.

Fourth, the "protocol" referred to in the embodiments of the present application may refer to a standard protocol in the field of communications, and may include, for example, an LTE protocol, an NR protocol, and related protocols applied in future communication systems, which is not limited in the present application.

The network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided by the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided by the embodiments of the present application is applicable to similar technical problems.

To facilitate understanding of the embodiments of the present application, a communication system suitable for use in the embodiments of the present application will be described in detail with reference to the communication system shown in fig. 4. Fig. 4 is a schematic diagram of a communication system to which the method according to the embodiment of the present application is applicable.

As shown in fig. 4, the communication system includes a network device and a terminal device.

Illustratively, the network devices may include network devices 401a through 401c, and the terminal devices may include terminal devices 402a through 402f. The terminal device may be connected to the network device by wireless means, and the network device may be connected to a core network (not shown in fig. 4) by wired or wireless means.

The network device is a device located at the network side of the communication system and having a wireless transceiver function or a chip system arranged on the device. The network devices include, but are not limited to: an Access Point (AP) in a wireless fidelity (WIRELESS FIDELITY, wiFi) system, such as a home gateway, a router, a server, a switch, a bridge, etc., an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), a wireless relay Node, a wireless backhaul Node, a transmission point (transmission and reception point, TRP, transmission point, TP), etc., may also be 5G, such as a gcb in a new air interface (NR) system, or a transmission point (TRP, TP), one or a group of base stations (including multiple antenna panels) antenna panels in a 5G system, or may also be network nodes constituting a gcb or transmission point, such as a BBU, or a distributed unit (base station), a base station unit (rsside unit), a DU, etc.

The terminal equipment is a terminal which is accessed into the communication system and has a wireless receiving and transmitting function or a chip system which can be arranged on the terminal. The terminal device can also be called an access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user equipment. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned (SELF DRIVING), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (SMART GRID), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (SMART CITY), a wireless terminal in smart home (smart home), a vehicle-mounted terminal, an RSU with a terminal function, or the like. The terminal device of the present application may be a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip, or a vehicle-mounted unit that is built in a vehicle as one or more components or units, and the vehicle may implement the channel state information measurement method provided by the present application through the built-in vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip, or vehicle-mounted unit.

It will be appreciated that in fig. 4, the roles of network device and terminal device may be relative, e.g., terminal device 402d in fig. 4 may be configured as a mobile base station, terminal device 402d being a network device for terminal device 402e or terminal device 402f accessing a network device (any of network devices 401 a-401 c) through terminal device 402 d. For the network devices (any one of the network devices 401a to 401 c), the terminal device 402d is a terminal device.

In the embodiment of the present application, both the network device and the terminal device may be collectively referred to as a communication apparatus, and the network devices 401a to 401c in fig. 4 may be referred to as a communication apparatus having a network device function, and the terminal device 402a and the terminal device 402f in fig. 4 may be referred to as a communication apparatus having a terminal device function.

It should be appreciated that fig. 4 is a simplified schematic diagram that is merely illustrative for ease of understanding, and that other network devices, and/or other terminal devices, may also be included in the communication system, and are not shown in fig. 4.

Alternatively, as one possible deployment scenario, as shown in fig. 5, the network device may include a Centralized Unit (CU) and/or a Distributed Unit (DU). Further, the network device may also include an active antenna unit (ACTIVE ANTENNA unit, AAU) (not shown in fig. 5).

The CU can be connected with the DU through a middle transmission (F1) interface. The CU may be connected to the core network via an NG interface.

Alternatively, a CU may implement some functions of the network device and a DU implement another part of the functions of the network device. For example, a CU may be responsible for handling non-real time protocols and services, implementing the functions of the radio resource control (radio resource control, RRC), packet data convergence layer protocol (PACKET DATA convergence protocol, PDCP) layer. The DUs may be responsible for handling physical layer protocols and real-time services, implementing the functions of the radio link control (radio link control, RLC), MAC and Physical (PHY) layers. It will be appreciated that this division of protocol layers is only an example and that other protocol layers may be divided.

Optionally, the AAU may implement part of the physical layer processing functions, radio frequency processing, and active antenna related functions. The information of the RRC layer may eventually become or be converted from the information of the PHY layer. Under this architecture, higher layer signaling (e.g., RRC layer signaling) may also be considered to be sent by DUs, or by DUs and AAUs.

Alternatively, in the network device structure shown in fig. 5, the signaling generated by the CU may be transmitted to the terminal device through a DU, or the signaling generated by the terminal device may be transmitted to the CU through a DU. The DU may be passed through to the terminal device or CU directly through protocol layer encapsulation without parsing the signaling.

In different systems, a CU or DU may also have different names, but the meaning will be understood by a person skilled in the art. For example, in an open radio access network (open radio access network, ORAN) system, a CU may also be referred to as an O-CU (open CU), and a DU may also be referred to as an O-DU. For convenience of description, the present application is described by taking CU and DU as examples. A CU or DU in the present application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

As shown in fig. 6, the network device includes an RRC signaling interworking module (RRC in fig. 6), a MAC signaling interworking module (MAC in fig. 6), and a PHY signaling and data interworking module (PHY in fig. 6). The terminal equipment comprises an RRC signaling interaction module, a MAC signaling interaction module and a PHY signaling and data interaction module.

And the RRC signaling can be interacted between the network equipment and the terminal equipment through the RRC signaling interaction module.

And the MAC CE signaling can be interacted between the network equipment and the terminal equipment through the MAC signaling interaction module.

One or more of the following may be interacted between the network device and the terminal device through the PHY interaction module: uplink control signaling, downlink control signaling (e.g., DCI), uplink data, downlink data.

In some embodiments, in order to solve the problem that ports corresponding to different port indexes are different, in the embodiment of the present application, a channel measurement method is provided, where in the channel measurement method, a network device may send first information to a terminal device to trigger the terminal device to report CSI, and send multiple CSI-RSs carried in the same CSI-RS resource to the terminal device, where the terminal device reports CSI according to measurement results of the multiple CSI-RSs. Wherein, the ports corresponding to the same port index in the plurality of CSI-RSs are the same. Therefore, as the ports corresponding to the same port in the plurality of CSI-RSs are the same, the indexes of the same port of different CSI-RSs can correspond to the same angle time delay pair, so that Doppler information can be more accurate, and the accuracy of the CSI can be improved.

In other embodiments, the terminal device receives CSI-RS from the network device on a channel measurement resource CMR and receives interference measurement signals from the network device on an interference measurement resource IMR. The end time of the interference measurement signal is located before the time domain position of the first reference resource, the end time of the CSI-RS is located before the time domain position of the second reference resource, and the time domain position of the first reference resource is located after the time domain position of the second reference resource. And the terminal equipment sends the CSI according to the CSI-RS and the interference measurement signal. Therefore, the time between the receiving of the interference signal and the reporting of the CSI by the terminal equipment is shorter than the time between the receiving of the channel measurement signal and the reporting of the CSI, and a more accurate interference measurement result is obtained.

It can be understood that the method for measuring channel state information provided in the embodiment of the present application may be applied between a terminal device and a network device shown in fig. 4, and specific implementation may refer to the following method embodiments, which are not described herein.

It can be understood that the scheme in the embodiment of the application can also be applied to other communication systems, and the corresponding names can also be replaced by the names of the corresponding functions in other communication systems.

The channel measurement method provided by the embodiment of the application will be specifically described with reference to fig. 7 to 9.

Fig. 7 is a schematic flow chart of a channel measurement method according to an embodiment of the present application. The channel measurement method may be applied to communication between the terminal device and the network device shown in fig. 4.

As shown in fig. 7, in order to solve the problem of inaccurate CSI measurement, the channel measurement method provided by the embodiment of the present application includes:

S701, the network device sends first information to the terminal device. Accordingly, the terminal device receives the first information from the network device.

The first information is used for triggering reporting of the CSI.

The first information may be DCI. Here, the first information is DCI for example only, and in practical implementation, the first information may also be other possible information or signaling, which is not described herein.

S702, the network equipment sends a plurality of CSI-RSs to the terminal equipment. Accordingly, the terminal device receives a plurality of CSI-RSs from the network device.

The plurality of CSI-RSs occupy the same CSI-RS resource, and the ports corresponding to the same port index of any two CSI-RSs in the plurality of CSI-RSs are the same.

Among them, a plurality of CSI-RS may be referred to as CSI-RS transmitted at a plurality of times. Optionally, each CSI-RS occupies one slot, that is, ports of CSI-RS in different slots are measured by each CSI-RS, and port indexes of ports with the same corresponding time domain resource, frequency domain resource and code domain resource are the same. The following is a description of two time domain units in fig. 8.

As shown in fig. 8, it is assumed that two CSI-RS measurements corresponding to 1 CSI-RS resource are located in time slot n and time slot n+1, respectively. For the kth symbol in slot n, resource Element (RE) #0 corresponding to subcarrier 7 and re#1 corresponding to subcarrier 6 belong to code division multiplexing (code division multiplexing, CDM) group #1, re#2 corresponding to subcarrier 5 and re#3 corresponding to subcarrier 4 belong to CDM group #2, re#4 corresponding to subcarrier 3 and re#5 corresponding to subcarrier 2 belong to CDM group #3, and re#6 corresponding to subcarrier 1 and re#7 corresponding to subcarrier 0 belong to CDM group #4.

For the kth symbol in slot n, re#8 corresponding to subcarrier 7 and re#9 corresponding to subcarrier 6 belong to CDM group #1, re#10 corresponding to subcarrier 5 and re#11 corresponding to subcarrier 4 belong to CDM group #2, re#12 corresponding to subcarrier 3 and re#13 corresponding to subcarrier 2 belong to CDM group #3, and re#14 corresponding to subcarrier 1 and re#15 corresponding to subcarrier 0 belong to CDM group #4. Wherein two REs distinguished by the same CDM group correspond to two port indexes. Wherein two REs belonging to the same CDM group correspond to two ports, and the two ports are distinguished by orthogonal codes in the CDM group. Each of CDM groups #1 to #4 may include orthogonal codes { +1, +1}, and the orthogonal codes in the CDM groups may be { +1, -1}.

It can be known that, in the slot n, re#0, re#1 and orthogonal codes { +1, +1} correspond to port index 0, re#0, re#1 and orthogonal codes { +1, -1} correspond to port index 1, re#2, re#3 and orthogonal codes { +1, +1} correspond to port index 2, re#2, re#3 and orthogonal codes { +1, -1} correspond to port index 3, re#4, re#5 and orthogonal codes { +1, +1} correspond to port index 4, re#5 and orthogonal codes { +1, -1} correspond to port index 5, re#6, re#7 and orthogonal codes { +1, +1} correspond to port index 6, re#6, re#7 and orthogonal codes { +1, -1} correspond to port index 7. In the slot n+1, RE#8, RE#9 and orthogonal codes { +1, +1} correspond to port index 0, RE#8, RE#9 and orthogonal codes { +1, -1} correspond to port index 1, RE#10, RE#11 and orthogonal codes { +1, +1} correspond to port index 2, RE#10, RE#11 and orthogonal codes { +1, -1} correspond to port index 3, RE#12, RE#13 and orthogonal codes { +1, +1} correspond to port index 4, RE#12, RE#13 and orthogonal codes { +1, -1} correspond to port index 5, RE#14, RE#15 and orthogonal codes { +1, +1} correspond to port index 6, RE#14, RE#15 and orthogonal codes { +1, -1} correspond to port index 7.

In the time slot n and the time slot n+1, the ports corresponding to the port index 0 are the same, the ports corresponding to the port index 1 are the same, the ports corresponding to the port index 2 are the same, the ports corresponding to the port index 3 are the same, the ports corresponding to the port index 4 are the same, the ports corresponding to the port index 5 are the same, the ports corresponding to the port index 6 are the same, and the ports corresponding to the port index 7 are the same.

N is an integer greater than or equal to 0, k is an integer greater than or equal to 0, and 0< = k <14.

The ports are the same, which means that the time domain resources, frequency domain resources, code domain resources and channels corresponding to the ports are the same. For example, in fig. 8, the ports corresponding to the port index 1 corresponding to the CSI-RS resource are the same, that is, the ports of the port index 1 in the slot n are the same as the ports of the port index 1 in the slot n+1. The channel identity for the ports may include the angle delay pair identity for the ports.

Ports corresponding to the same port index of any two CSI-RSs in the plurality of CSI-RSs are the same, that is, ports corresponding to the same port index between different CSI-RSs are the same for the plurality of CSI-RSs. For example, assuming that the plurality of CSI-RSs includes CSI-RS #0 to CSI-RS #3, CSI-RS #0 is identical to ports corresponding to the same port index in CSI-RS # 1. The CSI-rs#0 is identical to the ports corresponding to the same port index in the CSI-rs#2. The CSI-rs#0 is identical to the ports corresponding to the same port index in the CSI-rs#3. In the CSI-RS #1 and the CSI-RS #2, ports corresponding to the same port index are the same. In the CSI-RS #1 and the CSI-RS #3, ports corresponding to the same port index are the same. And the CSI-RS#2 is the same as the port corresponding to the same port index in the CSI-RS#3.

Optionally, for the terminal device, the first time length is a time length between an end time of receiving the first information and an end time of the at least two CSI measurements.

For example, assuming that the end time of the first information is T1', the at least two CSI measurements include 3 CSI-RS measurements, and the end time of the 3 rd CSI-RS measurement is T2', the first time length is a time length between T1 'and T2'.

Similarly, for a network device, the first time length is the time length between the end time of receiving the first information and the end time of at least two CSI measurements.

Wherein the number of at least two CSI measurements may be configured by RRC and/or DCI. It is understood that the number of at least two CSI measurements may be configured by other information, and will not be described here.

In this way, the CSI measurement of the codebooks other than the doppler codebook can be configured outside the first time length after the end time of the first information, so that the configuration flexibility of the CSI-RS can be improved.

Optionally, for the terminal device, the first time length is a time length between an end time of receiving the first information and a start time of the reference resource.

The starting time of the reference resource is determined according to a second time length, wherein the second time length is the time length between the ending time of the CSI-RS resource and the starting time of reporting the CSI. It may be appreciated that the end time of the first information may be the end time of the time slot in which the first information is located, and the start time of the reference resource may be the start time of the time slot in which the reference resource is located. At this time, the second time length may be a time length between an end time of the time slot where the first information is located and a start time of the time slot where the reference resource is located, or a time slot length between the time slot where the first information is located and the time slot where the reference resource is located.

Reference resources, i.e. CSI reference resources, may be referred to the above description of NR Rel-15 regarding CSI reference resources, and the principle of implementing the second time length may be referred to the above description of Z' in NR Rel-15, which is not repeated here. Or the implementation principle of the reference resource may refer to the implementation principle of the second reference resource described below, and the implementation principle of the second time length may refer to the implementation principle of Z' in the case of considering the doppler domain, which is not described herein.

For example, assuming that the ending time of the first information is T1', the starting time of the reference resource is T3', the first time length is the time length between T1 'and T3'.

Similarly, for a network device, the first time length is the time length between the end time of sending the first information and the start time of the reference resource.

In this way, the ports corresponding to the same port index of the reference signal for CSI-RS measurement are the same, so that the precision of the CSI is further improved.

Optionally, for the terminal device, the first time length is a time length between an end time of receiving the first information and a start time of reporting the CSI.

For example, assuming that the end time of the first information is T1', the start time of reporting CSI is T4', the first time length is a time length between T1 'and T4'.

Similarly, for the network device, the first time length is a time length between an end time of transmitting the first information and a start time of reporting the CSI.

It can be appreciated that the number of ports of different CSI-RSs in the same CSI-RS resource is the same. The starting time of the reference resource is located between the ending time of the first information and the starting time of reporting the CSI.

It may be understood that, in the embodiment of the present application, without any specific explanation, CSI-RS resources refer to CSI-RS resources used for calculating CSI reports.

S703, the terminal equipment reports the CSI according to the measurement results of the plurality of CSI-RSs. Accordingly, the network device receives CSI from the terminal device.

Wherein, the CSI is determined by the terminal equipment according to a plurality of CSI-RSs.

Based on the channel measurement method provided in fig. 7, the network device may send DCI and the first information, and the terminal device may report CSI according to measurement results of the CSI-RS after receiving the first information for triggering CSI reporting and receiving the CSI-RS. Because the ports corresponding to the same port index of any two CSI-RSs in the plurality of CSI-RSs are the same, the same port indexes of different CSI-RSs can correspond to the same angle delay pairs, so that Doppler information can be more accurate, and the accuracy of the CSI can be improved.

In some possible embodiments, in the case of the introduction of a doppler codebook, different Z' values can be set for the channel measurement and the interference measurement in order to increase the accuracy of the interference measurement. The following is described with reference to fig. 9. Fig. 9 is a second flowchart of a channel measurement method according to an embodiment of the present application.

As shown in fig. 9, the channel measurement method includes:

S901, the network device sends CSI-RS to the terminal device on the channel measurement resource CMR, and sends an interference measurement signal to the terminal device on the interference measurement resource IMR. Accordingly, the terminal device receives CSI-RS from the network device on the channel measurement resource CMR and receives interference measurement signals from the network device on the interference measurement resource IMR.

The end time of the interference measurement signal is located before the time domain position of the first reference resource, the end time of the CSI-RS is located before the time domain position of the second reference resource, and the time domain position of the first reference resource is located after the time domain position of the second reference resource.

The interference measurement signal may be a channel state signal-interference measurement (CSI-IM), or a non-zero power CHANNEL STATE information reference signal (NZP CSI-RS) REFERENCE SIGNAL.

The first reference resource is a resource corresponding to a time slot after the time slot where the terminal device actually receives the interference measurement signal. The implementation of the time domain position of the first reference resource may be according to the implementation principle of the reference resource, where Z' is a third time length, and the third time length is a time length between an end time of receiving a signal for performing interference measurement on the IMR and a start time of reporting CSI. For example, the third time period may be as shown in table 1, and will not be described herein.

In one possible design, the time length between the time domain position of the first reference resource and the starting time of reporting the CSI is a preset time length.

The time length between the time domain position of the second reference resource and the starting time of reporting the CSI is related to the measurement times of the CSI-RS and/or the number of time domain units of reporting the PMI.

For example, the implementation of the second reference resource may refer to the above description about the CSI reference resource, and the time domain position of the second reference resource may be determined according to the principles in the above description about the CSI reference resource, which is not described herein. The difference is that the Z' used for determining the second reference resource is a fourth time length, and the fourth time length is a time length between the end time of receiving the CSI-RS and the start time of reporting the CSI. The fourth time length is related to the number of time domain units corresponding to the CSI and/or the CSI-RS measurement number, that is, the fourth time length may be determined according to the number of time domain units corresponding to the CSI and/or the CSI-RS measurement number, which are not described herein.

For example, the CSI-RS measurement number may be any one of a plurality of CSI-RS measurement numbers configured in advance by the network device for the terminal device.

Optionally, in the embodiment of the present application, the CSI-RS measurement number may be a minimum CSI-RS measurement number of multiple CSI-RS measurement numbers configured in advance by the network device for the terminal device; or the CSI-RS measurement number may be the smallest CSI-RS measurement number among the multiple CSI-RS measurement numbers agreed by the protocol.

In one possible design, the fourth time length may relate to the number of time domain units corresponding to CSI, and may include: the fourth time length is positively correlated with the number of time domain units.

Illustratively, the fourth length of time Z2' satisfies the relationship shown in equation (1) below:

Z2’＝f1(N4)； (1)

Wherein N4 is the number of time domain units, f1 (N4) is a function related to N4, and for different values X and Y of N4, f1 (X) is greater than or equal to f1 (Y) if X and Y satisfy the following relationship X is greater than or equal to Y. For example, the fourth time length may satisfy the relationship shown in the following equation (2):

Z2’＝K2*N4+m； (2)

where K2 is a constant independent of m, and N4, and K2>0.m is a constant, e.g., m may be 0.

In another possible design, the number of time-domain units is divided into N sets, where the number of time-domain units in the nth set is greater than or equal to the number of time-domain units in the N-1 th set. The fourth time length corresponding to the number of different time domain units is the same. That is, the fourth time length is a piecewise function associated with N4.

Illustratively, the fourth time length may satisfy a relationship shown in the following equation (3):

Z2’＝K2*f2(N4)+X； (3)

where f2 (N4) is a piecewise function based on N4 and X is a constant.

Alternatively, the correlation of K2 with the CSI-RS measurement number may include: k2 is positively correlated with CSI-RS measurement times.

Further, K2 satisfies the relationship shown in the following formula (4):

K2＝a1(Ks-1)+b1； (4)

Wherein a1 and b1 are constants, a1 is more than 0, b1 is more than or equal to 0, and Ks is the measurement times of the CSI-RS.

Therefore, the same time length corresponding to the value of the number of the time domain units can be achieved, and therefore the scheduling complexity of the network equipment can be reduced.

In one possible embodiment, in the case where f (L, N4) is less than or equal to the first threshold value, the fourth time length satisfies the relationship shown in the following formula (5):

Z2′＝K3*α_μ； (5)

In the case where f (L, N4) is greater than the first threshold value, the fourth time length satisfies the relationship shown in the following formula (6):

Z2′＝K4*α_μ； (6)

where L is the number of spatial domain bases, N4 is the number of time domain units, f (L, N4) is a function related to L, N4, and α _μ is a constant greater than 0. Both K3 and K4 are constants. Or K3 is related to the CSI-RS measurement times and K4 is related to the CSI-RS measurement times.

In the case where K3 is related to the CSI-RS measurement times and K4 is related to the CSI-RS measurement times, the fourth time length may be made to match the CSI-RS measurement times, so that enough time may be reserved for CSI calculation.

Optionally, f (L, N4) is M times the product of the number of spatial bases and the number of time domain units. That is, f (L, N4) satisfies the relationship shown in the following formula (7):

f(L,N4)＝N4*M*L； (7)

Wherein M is an integer greater than or equal to 1.

Illustratively, M may be 1 or 2.

Alternatively, K3 is positively correlated with the CSI-RS measurement times, and K4 is positively correlated with the CSI-RS measurement times.

For example, K3 may satisfy the relationship shown in the following formula (8):

K3＝cKs+d； (8)

K4 may satisfy the relationship shown in the following formula (9):

K4＝eKs+f； (9)

Wherein, c, d and e are constants, and c is more than 0, d is more than or equal to 0, e is more than or equal to 0, and K4 is more than or equal to K3 is more than 0.

Optionally, the fourth time length is also related to the adjacent two CSI-RS measurement intervals.

Illustratively, the fourth time length is inversely proportional to the adjacent two CSI-RS measurement intervals.

For example, f1 (m 1) satisfies the relationship shown in the following formula (10):

f1(m1)＝(r₁-m1)s₁+p₁； (10)

or f1 (m 1) satisfies the relationship shown in the following formula (11):

f1(m1)＝(r₁-m1)²s₁+p₁； (11)

Wherein m1 is the interval between two adjacent CSI-RS measurements, the value of r ₁,s₁,p₁ is a constant, and r ₁>0,p₁≥0,s₁ is more than 0. Two adjacent CSI-RS measurements refer to that for one CSI, there are no other CSI-RS measurements for that CSI between the two CSI-RS.

Further, f1 (m 1) satisfies the relationship shown in the following formula (12):

Or f1 (m 1) satisfies the relationship shown in the following formula (13):

Further, s ₁ is a positive integer, for example, 4,5, etc., s ₂ is a positive integer and s ₁.r₁ is a positive integer or more. The meaning of the two formulas is that when the interval of the sending time is smaller than r ₁, the value of f1 (m 1) is inversely proportional to m 1; and when the interval m1 of the sending time is greater than or equal to a certain predefined positive integer r ₁, the terminal equipment can complete the calculation of the CSI within the interval m1, and the value of f1 (m 1) is not changed along with m1 any more, but takes a fixed value s ₂.

It can be seen that the value of n _CSI-ref is determined to be inversely proportional to the interval between two adjacent CSI-RS measurements, that is, the time domain position of the target CSI resource is more advanced than the time domain position reported by the CSI as m is reduced, so that the reserved CSI measurement result calculation time is increased under the condition that the interval between CSI-RS measurement moments is reduced, and the calculation can be further completed within the reserved CSI measurement result calculation time on the premise that the interval between two adjacent CSI-RS cannot be completed due to the small time interval, so that the resource of the terminal device is effectively utilized, and the communication performance of the terminal device is further improved.

In another possible design, the fourth time length is constant and the fourth time length corresponds to the subcarrier spacing.

S902, the terminal equipment sends the CSI. Accordingly, the network device receives the CSI.

Wherein, the CSI is generated according to the CSI-RS and the interference measurement signal.

The implementation principle of S902 may refer to the description of S103, which is not repeated herein.

It will be appreciated that prior to S901, the method provided in fig. 9 further includes S900.

And S900, the network equipment sends second information to the terminal equipment. Correspondingly, the terminal device receives the second information from the network device.

The second information is used for triggering the terminal equipment to report the CSI.

The second information may be DCI, for example. Here, the second information is DCI for example only, and in practical implementation, the second information may also be other possible information or signaling, which is not described herein.

Based on the method provided in fig. 9, the end time of the interference signal received by the terminal device, for example, before the time domain position of the first reference resource, the end time of the CSI-RS, for example, before the time domain position of the second reference resource, is based on the CSI-RS and the interference measurement signal CSI, so that the time between the receiving of the interference signal and the reporting of the CSI by the terminal device is shorter than the time between the receiving of the channel measurement signal and the reporting of the CSI, thereby obtaining a more accurate interference measurement result.

The channel measurement method provided by the embodiment of the application is described in detail above with reference to fig. 7 to 9. A communication apparatus for performing the channel measurement method provided in the embodiment of the present application is described in detail below with reference to fig. 10 to 11.

Fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application. As shown in fig. 10, the communication apparatus 1000 includes: a processing module 1001 and a transceiver module 1002. For ease of illustration, fig. 10 shows only the main components of the communication device 1000.

In some embodiments, the communication apparatus 1000 may be adapted to perform the functions of a terminal device in the channel measurement method shown in fig. 7 in the communication system shown in fig. 4.

Wherein, the transceiver module 1002 is configured to receive first information from a network device. The first information is used for indicating triggering reporting of the CSI.

The transceiver module 1002 is further configured to receive multiple CSI-RSs from a network device. The plurality of CSI-RSs are borne on ports which occupy the same CSI-RS resource and correspond to the same port index of any two CSI-RSs in the plurality of CSI-RSs.

The processing module 1001 is configured to generate measurement results of the multiple CSI-RSs according to the multiple CSI-RSs.

The transceiver module 1002 is further configured to report CSI. Wherein, the CSI is obtained according to the measurement results of a plurality of CSI-RSs.

Optionally, the first time length is a time length between an end time of receiving the first information and a start time of the reference resource, where the start time of the reference resource is determined according to a second time length, and the second time length is a time length between an end time of the CSI-RS resource and a start time of reporting the CSI.

Optionally, the first time length is a time length between an end time of receiving the first information and a start time of reporting the CSI.

Alternatively, the transceiver module 1002 may include a receiving module and a transmitting module (not shown in fig. 10). The transceiver module 1002 is configured to implement a transmitting function and a receiving function of the communication device 1000.

Optionally, the communication device 1000 may further include a storage module (not shown in fig. 10) storing a program or instructions. The processing module 1001, when executing the program or instructions, enables the communication apparatus 1000 to perform the functions of the terminal device in the method illustrated in any one of fig. 7.

It is to be appreciated that the processing module 1001 involved in the communication device 1000 may be implemented by a processor or processor-related circuit component, which may be a processor or processing unit; the transceiver module 1002 may be implemented by a transceiver or transceiver-related circuit component, which may be a transceiver or a transceiver unit.

It is to be understood that the communication apparatus 1000 may be a terminal device, or may be a chip (system) or other parts or components that may be disposed in the terminal device, or may be an apparatus including the terminal device, which is not limited in this aspect of the present application.

In addition, the technical effects of the communication apparatus 1000 may refer to the technical effects of the method shown in any one of fig. 7, and will not be described herein.

In other embodiments, the communication apparatus 1000 may be adapted to perform the functions of the network device in the channel measurement method shown in fig. 7 in the communication system shown in fig. 4.

The processing module 1001 is configured to generate first information. The first information is used for triggering reporting of the CSI.

And a transceiver module 1002, configured to send the first information to the terminal device.

The transceiver module 1002 is further configured to send multiple CSI-RSs to a terminal device. The plurality of CSI-RSs occupy the same CSI-RS resource, and the ports corresponding to the same port index of any two CSI-RSs in the plurality of CSI-RSs are the same.

The transceiver module 1002 is further configured to receive CSI from a terminal device. Wherein, the CSI is determined by the terminal equipment according to a plurality of CSI-RSs.

Optionally, the communication device 1000 may further include a storage module (not shown in fig. 10) storing a program or instructions. The program or instructions, when executed by the processing module 1001, enable the communications apparatus 1000 to perform the functions of a network device in the method illustrated in any one of fig. 7.

It is to be understood that the communication apparatus 1000 may be a network device, or may be a chip (system) or other parts or components that may be disposed in the network device, or may be an apparatus including a network device, which is not limited in this aspect of the present application.

In still other embodiments, the communication apparatus 1000 may be adapted to perform the functions of a terminal device in the channel measurement method shown in fig. 9 in the communication system shown in fig. 4.

The transceiver module 1002 is configured to receive CSI-RS from a network device on a channel measurement resource CMR, and receive an interference measurement signal from the network device on an interference measurement resource IMR. The end time of the interference measurement signal is located before the time domain position of the first reference resource, the end time of the CSI-RS is located before the time domain position of the second reference resource, and the time domain position of the first reference resource is located after the time domain position of the second reference resource.

A processing module 1001 is configured to generate CSI according to the CSI-RS and the interference measurement signal.

The transceiver module 1002 is further configured to send CSI.

Optionally, the communication device 1000 may further include a storage module (not shown in fig. 10) storing a program or instructions. The processing module 1001, when executing the program or instructions, enables the communication apparatus 1000 to perform the functions of the terminal device in the method illustrated in any one of fig. 9.

In addition, the technical effects of the communication apparatus 1000 may refer to the technical effects of the method shown in any one of fig. 9, and will not be described herein.

In still other embodiments, the communication apparatus 1000 may be adapted to perform the functions of a network device in the channel measurement method shown in fig. 9 in the communication system shown in fig. 4.

The transceiver module 1002 is configured to send CSI-RS to the terminal device on a channel measurement resource CMR, and send an interference measurement signal to the terminal device on an interference measurement resource IMR. The end time of the interference measurement signal is located before the time domain position of the first reference resource, the end time of the CSI-RS is located before the time domain position of the second reference resource, and the time domain position of the first reference resource is located after the time domain position of the second reference resource.

Processing module 1001 is configured to generate CSI.

The transceiver module 1002 is further configured to receive CSI.

Optionally, the communication device 1000 may further include a storage module (not shown in fig. 10) storing a program or instructions. The program or instructions, when executed by the processing module 1001, enable the communications apparatus 1000 to perform the functions of a network device in the method illustrated in any one of fig. 9.

Fig. 11 is a schematic diagram of a second structure of a communication device according to an embodiment of the present application. The communication device may be a terminal device or a network device, or may be a chip (system) or other parts or components that may be provided in the terminal device or the network device. As shown in fig. 11, the communication device 1100 may include a processor 1101. Optionally, the communication device 1100 may also include memory 1102 and/or a transceiver 1103. The processor 1101 is coupled to the memory 1102 and the transceiver 1103, as may be connected by a communication bus.

The following describes the respective constituent elements of the communication apparatus 1100 in detail with reference to fig. 11:

The processor 1101 is a control center of the communication device 1100, and may be one processor or a collective term of a plurality of processing elements. For example, the processor 1101 is one or more central processing units (central processing unit, CPU), may be an Application SPECIFIC INTEGRATED Circuit (ASIC), or may be one or more integrated circuits configured to implement embodiments of the present application, such as: one or more digital signal processors (DIGITAL SIGNAL processors, DSPs), or one or more field programmable gate arrays (field programmable GATE ARRAY, FPGAs).

Alternatively, the processor 1101 may perform various functions of the communication apparatus 1100 by running or executing software programs stored in the memory 1102 and invoking data stored in the memory 1102.

In a particular implementation, the processor 1101 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 11, as an embodiment.

In a specific implementation, as an embodiment, the communication device 1100 may also include multiple processors, such as the processor 1101 and the processor 1104 shown in fig. 11. Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

The memory 1102 is configured to store a software program for executing the solution of the present application, and is controlled to execute by the processor 1101, and the specific implementation may refer to the above method embodiment, which is not described herein again.

Alternatively, memory 1102 may be, but is not limited to, read-only memory (ROM) or other type of static storage device that can store static information and instructions, random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, as well as electrically erasable programmable read-only memory (ELECTRICALLY ERASABLE PROGRAMMABLE READ-only memory, EEPROM), compact disc read-only memory (compact disc read-only memory) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 1102 may be integral to the processor 1101 or may exist separately and be coupled to the processor 1101 by an interface circuit (not shown in fig. 11) of the communication device 1100, which is not specifically limited by the embodiment of the present application.

A transceiver 1103 for communication with other communication devices. For example, the communication apparatus 1100 is a terminal device, and the transceiver 1103 may be used to communicate with a network device or another terminal device. As another example, the communication apparatus 1100 is a network device, and the transceiver 1103 may be used to communicate with a terminal device or another network device.

Alternatively, the transceiver 1103 may include a receiver and a transmitter (not separately shown in fig. 11). The receiver is used for realizing the receiving function, and the transmitter is used for realizing the transmitting function.

Alternatively, transceiver 1103 may be integrated with processor 1101, or may exist separately, and be coupled to processor 1101 by an interface circuit (not shown in fig. 11) of communication device 1100, as embodiments of the present application are not limited in this regard.

It will be appreciated that the configuration of the communication device 1100 shown in fig. 11 is not limiting of the communication device, and that an actual communication device may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.

In addition, the technical effects of the communication apparatus 1100 may be referred to as those of the method described in the above-described method embodiment,

It is to be appreciated that the processor in embodiments of the application may be a CPU, but may also be other general purpose processors, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be ROM, programmable ROM (PROM), erasable programmable ROM (erasable PROM), EEPROM, or flash memory, among others. The volatile memory may be RAM, which acts as external cache. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (STATIC RAM, SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (double DATA RATE SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous link dynamic random access memory (SYNCHLINK DRAM, SLDRAM), and direct memory bus random access memory (direct rambus RAM, DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware (e.g., circuitry), firmware, or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more sets of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. In addition, the character "/" herein generally indicates that the associated object is an "or" relationship, but may also indicate an "and/or" relationship, and may be understood by referring to the context.

In the present application, "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A channel measurement method, the channel measurement method comprising:

Receiving first information from a network device; the first information is used for triggering reporting of Channel State Information (CSI);

Receiving a plurality of channel state information reference signals (CSI-RSs) from the network equipment; the plurality of CSI-RSs occupy the same CSI-RS resource, and the ports corresponding to the same port index of any two CSI-RSs in the plurality of CSI-RSs are the same;

and reporting the CSI according to the measurement results of the plurality of CSI-RSs.

2. The method of claim 1, wherein the CSI-RS resource is a periodic CSI-RS resource or a semi-persistent CSI-RS resource.

3. The method according to claim 1 or 2, wherein ports corresponding to the same port index of any two CSI-RS of the plurality of CSI-RS are the same, comprising: and in a first time length after the end time of the first information, ports corresponding to the same port index of any two CSI-RSs in the plurality of CSI-RSs are the same.

4. A method according to claim 3, characterized in that the first time length is the time length between the end time of receiving the first information and the end time of at least two CSI measurements.

5. The method of claim 3, wherein the first time length is a time length between an end time of receiving the first information and a start time of a reference resource, wherein the start time of the reference resource is determined according to a second time length, and wherein the second time length is a time length between the end time of the CSI-RS resource and a start time of reporting CSI.

6. The method of claim 3, wherein the first length of time is a length of time between an end time of receiving the first information and a start time of reporting the CSI.

7. A channel measurement method, the channel measurement method comprising:

Sending first information to terminal equipment; the first information is used for triggering reporting of Channel State Information (CSI);

Transmitting a plurality of channel state information reference signals (CSI-RS) to the terminal equipment; the plurality of CSI-RSs occupy the same CSI-RS resource, and the ports corresponding to the same port index of any two CSI-RSs in the plurality of CSI-RSs are the same;

receiving CSI from the terminal equipment; wherein the CSI is determined by the terminal device according to the plurality of CSI-RSs.

8. The method of claim 7, wherein the CSI-RS resource is a periodic CSI-RS resource or a semi-persistent CSI-RS resource.

9. The method according to claim 7 or 8, wherein ports corresponding to the same port index of any two CSI-RS of the plurality of CSI-RS are the same, comprising: and in a first time length after the end time of the first information, ports corresponding to the same port index of any two CSI-RSs in the plurality of CSI-RSs are the same.

10. The method of claim 9, wherein the first time length is a time length between an end time of transmitting the first information and an end time of at least two CSI measurements.

11. The method of claim 9, wherein the first time length is a time length between an end time of transmitting the first information and a start time of a reference resource, wherein the start time of the reference resource is determined according to a second time length, and wherein the second time length is a time length between the end time of the CSI-RS resource and a start time of reporting CSI.

12. The method of claim 9, wherein the first length of time is a length of time between an end time of transmitting the first information and a start time of reporting the CSI.

13. A communication device, the device comprising: a processing module and a receiving-transmitting module;

The receiving and transmitting module is used for receiving first information from the network equipment; the first information is used for indicating triggering reporting of Channel State Information (CSI);

The transceiver module is further configured to receive a plurality of channel state information reference signals CSI-RS from the network device; the plurality of CSI-RSs occupy the same CSI-RS resource, and the ports corresponding to the same port index of any two CSI-RSs in the plurality of CSI-RSs are the same;

the processing module is used for generating measurement results of the plurality of CSI-RSs according to the plurality of CSI-RSs;

The receiving and transmitting module is further configured to report the CSI, where the CSI is obtained according to measurement results of the multiple CSI-RS.

14. The apparatus of claim 13, wherein the CSI-RS resource is a periodic CSI-RS resource or a semi-persistent CSI-RS resource.

15. The apparatus according to claim 13 or 14, wherein ports corresponding to the same port index of any two CSI-RS of the plurality of CSI-RS are the same, comprising: and in a first time length after the end time of the first information, ports corresponding to the same port index of any two CSI-RSs in the plurality of CSI-RSs are the same.

16. The apparatus of claim 15, wherein the first length of time is a length of time between an end time of receiving the first information and an end time of at least two CSI measurements.

17. The apparatus of claim 15, wherein the first time length is a time length between an end time of receiving the first information and a start time of a reference resource, wherein the start time of the reference resource is determined according to a second time length, and wherein the second time length is a time length between the end time of the CSI-RS resource and a start time of reporting CSI.

18. The apparatus of claim 15, wherein the first length of time is a length of time between an end time of receiving the first information and a start time of reporting the CSI.

19. A communication device, the device comprising: a processing module and a receiving-transmitting module;

the processing module is used for generating first information; the first information is used for triggering reporting of Channel State Information (CSI);

The receiving and transmitting module is used for sending first information to the terminal equipment;

The receiving and transmitting module is further configured to send a plurality of channel state information reference signals CSI-RS to the terminal device; the plurality of CSI-RSs occupy the same CSI-RS resource, and the ports corresponding to the same port index of any two CSI-RSs in the plurality of CSI-RSs are the same;

The receiving and transmitting module is further configured to receive CSI from the terminal device; wherein the CSI is determined by the terminal device according to the plurality of CSI-RSs.

20. The apparatus of claim 19, wherein the CSI-RS resource is a periodic CSI-RS resource or a semi-persistent CSI-RS resource.

21. The apparatus of claim 19 or 20, wherein ports corresponding to the same port index of any two CSI-RS of the plurality of CSI-RS are the same, comprising: and in a first time length after the end time of the first information, ports corresponding to the same port index of any two CSI-RSs in the plurality of CSI-RSs are the same.

22. The apparatus of claim 21, wherein the first length of time is a length of time between an end time of transmitting the first information and an end time of at least two CSI measurements.

23. The apparatus of claim 21, wherein the first time length is a time length between an end time of transmitting the first information and a start time of a reference resource, wherein the start time of the reference resource is determined according to a second time length between the end time of the CSI-RS resource and a start time of reporting CSI.

24. The apparatus of claim 21, wherein the first length of time is a length of time between an end time of transmitting the first information and a start time of reporting the CSI.

25. A communication device, comprising: a processor and a memory; the memory is configured to store computer instructions which, when executed by the processor, cause the communication device to perform the method of any of claims 1-6 or to perform the method of any of claims 7-12.

26. A communication device, comprising: a processor and interface circuit; wherein,

The interface circuit is used for receiving code instructions and transmitting the code instructions to the processor;

the processor is configured to execute the code instructions to perform the method of any one of claims 1-6 or to perform the method of any one of claims 7-12.

27. A communication device comprising a processor and a transceiver for information interaction between the communication device and other communication devices, the processor executing program instructions for performing the method of any of claims 1-6 or for performing the method of any of claims 7-12.

28. The communication device according to any one of claims 25-27, wherein the communication device is a chip.

29. A computer readable storage medium comprising a computer program or instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-6 or to perform the method of any one of claims 7-12.

30. A computer program product, the computer program product comprising: computer program or instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-6 or to perform the method of any one of claims 7-12.