CN109995409B

CN109995409B - Channel state information measuring method, terminal equipment and network equipment

Info

Publication number: CN109995409B
Application number: CN201810005731.3A
Authority: CN
Inventors: 韩玮; 葛士斌; 王潇涵; 毕晓艳
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-01-03
Filing date: 2018-01-03
Publication date: 2022-07-12
Anticipated expiration: 2038-01-03
Also published as: CN109995409A; WO2019134570A1

Abstract

The application provides a Channel State Information (CSI) measuring method, terminal equipment and network equipment. The method comprises the following steps: the terminal equipment receives downlink control information, the downlink control information carries measurement information used for CSI measurement, and the measurement information at least comprises indication information of CSI-RS resource configuration so as to indicate CSI-RS resources; and if not, performing CSI measurement each time based on the measurement information carried in at least two pieces of downlink control information received in the preset time period. Therefore, the terminal equipment can autonomously determine the measurement type according to the quantity of the downlink control information received in the preset time period, and the signaling overhead can be reduced; meanwhile, the network equipment can determine a reasonable transmission scheme and a scheduling strategy according to the measured CSI, and the improvement of the data transmission reliability is facilitated.

Description

Channel state information measuring method, terminal equipment and network equipment

Technical Field

The present application relates to the field of communications, and more particularly, to a method for measuring channel state information, a terminal device, and a network device.

Background

Coordinated Multiple Point (CoMP) transmission is a method for solving the inter-cell interference problem and improving the throughput of cell-edge users. In a CoMP transmission scenario, when a certain network device communicates with a terminal device, it may not know whether there are other network devices and several other network devices communicating with the terminal device, so that the network device may indicate an interference measurement assumption condition to the terminal device, so that the terminal device performs Channel State Information (CSI) measurement and feedback according to various interference measurement assumption conditions. The network device can further determine a transmission scheme according to the measured and fed back CSI under various interference measurement assumption conditions, and adaptively adjust a scheduling strategy.

In the prior art, the network device may indicate various interference measurement assumption conditions to the terminal device through downlink control information. For example, if S (S ≧ 1, S being an integer) interference measurement hypothesis conditions are to be indicated, the network device needs to indicate S times, and one or more interference measurement resources are indicated in each indication, with a large signaling overhead. As the number of stations for cooperative transmission increases, the assumed interference measurement condition also increases, and the signaling overhead caused by the assumption interference measurement condition is more serious.

Disclosure of Invention

The application provides a channel state information measuring method, a terminal device and a network device, which can reduce signaling overhead.

In a first aspect, a method for measuring channel state information is provided, including:

the method comprises the steps that terminal equipment receives downlink control information, wherein the downlink control information carries measurement information used for measuring Channel State Information (CSI), the measurement information at least comprises indication information of CSI-RS resource configuration, and the indication information of the CSI-RS resource configuration is used for indicating CSI-RS resources;

and receiving one piece of downlink control information in the preset time period, wherein the terminal equipment only carries out CSI measurement based on the measurement information carried in the one piece of downlink control information, otherwise, carrying out each CSI measurement based on the measurement information carried in at least two pieces of downlink control information received in the preset time period.

In other words, a plurality of pieces of downlink control information are received in a preset time period, and the terminal device performs each CSI measurement based on measurement information carried in at least two pieces of downlink control information received in the preset time period; or

And receiving one piece of downlink control information in the preset time period, and carrying out CSI measurement by the terminal equipment only based on the measurement information carried in the one piece of downlink control information. The terminal device performs multiple CSI measurements on measurement information carried by at least two pieces of downlink control information in the multiple pieces of downlink control information received in the preset time period, where each CSI measurement in the multiple pieces of CSI measurements may be performed based on the measurement information carried by at least two pieces of downlink control information in the multiple pieces of downlink control information, and the at least two pieces of downlink control information on which any two pieces of CSI measurements are based may be different.

In the present application, for convenience of differentiation, CSI measurements may be divided into two measurement types, single-site-based CSI measurements and multi-site-based CSI measurements. In the CSI measurement based on a single site, the CSI measurement can be carried out based on the measurement information carried in one piece of downlink control information; in the multi-site-based CSI measurement, each CSI measurement may be performed based on measurement information carried in a plurality of pieces of downlink control information. Alternatively, the measurement types may include: and measuring CSI based on the measurement information carried in at least two pieces of downlink control information, or measuring CSI based on the measurement information carried in one piece of downlink control information.

Based on the above technical scheme, the terminal device may perform CSI measurement based on different measurement types according to the number of downlink control information received in a preset time period. Therefore, the additional signaling overhead of the network equipment is not needed to indicate various interference measurement assumed conditions, but the terminal equipment autonomously determines the measurement type, so that the signaling overhead can be greatly saved. In addition, the determined measurement type can obtain more accurate CSI feedback to the network equipment, so that the network equipment is facilitated to determine a reasonable transmission scheme and a scheduling strategy, namely, the reliability of data transmission is improved, and the system performance is improved.

With reference to the first aspect, in certain implementations of the first aspect,

the terminal device performs each CSI measurement based on the measurement information carried by the at least two downlink control information received in the preset time period, including:

the terminal device performs each CSI measurement based on measurement information carried in N pieces of downlink control information received in the preset time period, a CSI-RS resource indicated by the downlink control information except the nth downlink control information in the N pieces of downlink control information is an interference measurement resource of the CSI-RS resource indicated by the nth downlink control information, the nth downlink control information is one of a plurality of pieces of downlink control information received by the terminal device in the preset time period, N is not less than N and not less than 1, N is not less than 2, and N and N are integers.

Assuming that the terminal device receives M downlink control information within the preset time period, M is greater than or equal to N is greater than or equal to 2, and M, N are integers. In other words, the N pieces of downlink control information are some or all of the M pieces of downlink control information. The M pieces of downlink control information may correspond to the M pieces of network equipment one to one, and if the terminal device receives the downlink control information from the M pieces of network equipment within a preset time period, the CSI measurement based on multiple sites may be performed for each of the M pieces of network equipment, or the measurement based on multiple sites may be performed for each of some network equipment among the M pieces of network equipment, that is, the number N of times that the terminal device performs CSI measurement may be a positive integer less than or equal to M, and each CSI measurement may be performed based on measurement information carried in some or all of the M pieces of downlink control information.

It should be noted that, in the process of performing CSI measurement on the basis of the N pieces of downlink control information for the nth downlink control information in the N pieces of downlink control information, a CSI-RS resource indicated by the downlink control information except for the nth downlink control information in the N pieces of downlink control information may be used as an interference measurement resource of the CSI-RS resource indicated by the nth downlink control information.

With reference to the first aspect, in certain implementations of the first aspect, the measurement information further includes indication information that the codebook subset restricts a CSR, where the indication information of the CSR is used to indicate the restricted codebook subset, and the codebook subset includes part or all of codewords in a codebook; and

and the terminal equipment performs each CSI measurement based on the codebook subsets indicated by the at least two downlink control information received in the preset time period.

By indicating the codebook subset used by the network device to the terminal device, more information can be provided for the terminal device to perform CSI measurement, for example, the terminal device can perform precoding on the received CSI-RS based on the codebook subset, so that an optimal precoding matrix can be determined and fed back to the network device.

In one possible design, the measurement information is carried in a CSI request (CSI request) field.

The CSI request field may be a field in DCI defined in the LTE protocol or the NR protocol.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes:

the terminal equipment receives first indication information, and the first indication information indicates whether CSI measurement is carried out based on measurement information carried in at least two pieces of downlink control information.

In other words, the first indication information indicates whether to perform CSI measurement based on measurement information carried in one piece of downlink control information, or the first indication information indicates whether to perform CSI measurement based on measurement information carried in one piece of downlink control information or to perform CSI measurement based on measurement information carried in at least two pieces of downlink control information.

That is, the network device may autonomously determine a measurement type of the CSI measurement and indicate the measurement type of the CSI measurement to the terminal device. Therefore, the network equipment can instruct the terminal equipment to perform corresponding CSI measurement according to the current requirement, so that the network equipment can determine a reasonable transmission scheme and a scheduling strategy, and the reliability of data transmission is improved.

With reference to the first aspect, in some implementations of the first aspect, if the terminal device receives multiple pieces of downlink control information, each piece of downlink control information in the multiple pieces of downlink control information carries indication information of a CSI report configuration; or

Only one downlink control information in the plurality of downlink control information carries indication information configured by a plurality of CSI reports; or

And only one downlink control information in the plurality of downlink control information carries indication information of one CSI report configuration.

In the present application, specific content of the measurement information carried in the downlink control information is not particularly limited, and various possible cases of the specific content of the measurement information carried in one downlink control information are listed above.

the terminal equipment sends CSI which is measured and obtained based on measurement information carried in one or at least two pieces of downlink control information.

The terminal device may send respective corresponding CSI to each network device, or may send CSI measured for each network device to a certain network device, which is not limited in this application. In addition, the CSI sent by the terminal device may be CSI measured based on measurement information carried in one piece of downlink control information, or CSI measured based on measurement information carried in at least two pieces of downlink control information.

In a second aspect, a method for measuring channel state information is provided, including:

and the terminal equipment sends Channel State Information (CSI), wherein the CSI is obtained by measurement based on measurement information carried in only one piece of downlink control information, or the CSI is obtained by measurement based on measurement information carried in at least two pieces of downlink control information.

With reference to the first aspect or the second aspect, in a possible implementation manner, the terminal device may carry the CSI through a field, where the field may be used to carry the CSI obtained through single-site CSI measurement, and may also be used to carry the CSI obtained through multi-site CSI measurement.

Optionally, the sending, by the terminal device, CSI includes:

the terminal equipment sends a first CSI report, wherein the first CSI report comprises a first field and a second field, and the first field comprises: at least one CSI obtained through measurement based on measurement information carried by one piece of downlink control information, or at least one CSI obtained through measurement based on measurement information carried by at least two pieces of downlink control information, wherein the second field indicates whether the CSI in the first field is obtained through measurement based on the measurement information carried by at least two pieces of downlink control information or not; or

The terminal device sends a plurality of first CSI reports, each of the plurality of first CSI reports comprises a first field and a second field, the first field comprises a CSI measured based on measurement information carried in one or at least two pieces of downlink control information, and the second field indicates whether each CSI in the first field is measured based on the measurement information carried in at least two pieces of downlink control information.

The feedback process of the CSI explicitly indicates the measurement type on which the CSI is based through an indication field.

Optionally, the sending, by the terminal device, CSI includes:

the terminal equipment sends a first CSI report, wherein the first CSI report comprises a first field, and the first field comprises at least one CSI obtained by measurement based on measurement information carried in at least two pieces of downlink control information or a predefined value; the predefined value implicitly indicates that the terminal equipment does not perform CSI measurement based on measurement information carried in at least two pieces of downlink control information; or

The terminal equipment sends a plurality of first CSI reports, wherein each first CSI report in the plurality of first CSI reports comprises a first field, and the first field comprises a CSI obtained by measurement based on at least two pieces of measurement information carried by downlink control information or a predefined value; the predefined value implicitly indicates that the terminal device does not perform CSI measurement based on measurement information carried in at least two pieces of downlink control information.

The feedback process of the CSI indicates the measurement type based on the CSI in an implicit indication mode, so that bit overhead brought by indication can be saved.

With reference to the first aspect or the second aspect, in another possible implementation manner, the terminal device may carry CSI through a plurality of fields, where one field may be used to carry CSI obtained through single-site based CSI measurement, and may also be used to carry CSI obtained through multi-site based CSI measurement; another field may be used to carry CSI measured based on only one measurement type, e.g., CSI measured based on single-site CSI. The CSI is carried by the plurality of fields, and the CSI measurement result based on the single site and the CSI measurement result based on the multiple sites can be simultaneously fed back to the network equipment, so that the network equipment can determine a more reasonable transmission scheme and scheduling strategy.

Optionally, the sending, by the terminal device, CSI includes:

the terminal equipment sends a second CSI report, wherein the second CSI report comprises a third field and a fourth field, the third field is used for carrying at least one CSI obtained by measurement based on measurement information carried in one or at least two pieces of downlink control information, and the fourth field is used for carrying at least one CSI obtained by measurement based on measurement information carried in one piece of downlink control information; or

The terminal device sends a plurality of second CSI reports, wherein each second CSI report in the plurality of second CSI reports comprises a third field and a fourth field, the third field is used for carrying CSI measured based on measurement information carried in one or at least two pieces of downlink control information, and the fourth field is only used for carrying CSI measured based on measurement information carried in one piece of downlink control information.

Optionally, the second CSI report further includes a fifth field, where the fifth field indicates whether each CSI carried in the third field is measured based on measurement information carried in at least two pieces of downlink control information.

In a third aspect, a method for measuring channel state information is provided, including:

the network equipment receives Channel State Information (CSI);

the network equipment determines whether the received CSI is measured based on measurement information carried in at least two pieces of downlink control information.

In other words, after receiving the CSI, the network device may determine whether the CSI is measured based on measurement information carried in one piece of downlink control information, or determine whether the CSI is measured based on measurement information carried in one piece of downlink control information or measured based on measurement information carried in at least two pieces of downlink control information.

Therefore, the terminal device can autonomously decide the measurement type based on which the CSI measurement is performed, and the measurement type based on which the CSI measurement is performed can be fed back to the network device by any one of the following implementations while the CSI is fed back to the network device.

In a possible implementation manner, the terminal device may carry the CSI through a field, where the field may be used to carry the CSI obtained by CSI measurement based on a single site, or may be used to carry the CSI obtained by CSI measurement based on multiple sites.

Optionally, the network device receives CSI, including:

the network equipment receives a first CSI report, wherein the first CSI report comprises a first field and a second field, the first field comprises at least one CSI measured based on measurement information carried in one or at least two pieces of downlink control information, and the second field indicates whether each CSI in the first field is measured based on the measurement information carried in at least two pieces of downlink control information.

Optionally, the network device receives CSI, including:

the network equipment receives a first CSI report, wherein the first CSI report comprises a first field, and the first field comprises at least one CSI obtained by measurement based on measurement information carried in at least two pieces of downlink control information or a predefined value; the predefined value implicitly indicates that the terminal device does not perform CSI measurement based on measurement information carried in at least two pieces of downlink control information.

Optionally, the network device receives CSI, including:

the network equipment receives a second CSI report, wherein the second CSI report comprises a third field and a fourth field, the third field is used for carrying at least one CSI obtained by measurement based on measurement information carried by one or at least two pieces of downlink control information, and the fourth field is used for carrying at least one CSI obtained by measurement based on only one CSI-RS resource.

Optionally, the second CSI report further includes a fifth field, where the fifth field indicates whether each CSI carried in the third field is measured based on measurement information carried by at least two pieces of downlink control information.

In a fourth aspect, a terminal device is provided, configured to perform the method in the first to second aspects or any possible implementation manner of the first to second aspects. In particular, the terminal device comprises means for performing the method of any one of the above-mentioned first to second aspects or possible implementations of the first to second aspects.

In a fifth aspect, a network device is provided, configured to perform the method of the third aspect or any possible implementation manner of the third aspect. In particular, the network device includes means for performing the method of the third aspect or any one of the possible implementation manners of the third aspect.

In a sixth aspect, a terminal device is provided that includes a transceiver, a processor, and a memory. The processor is configured to control the transceiver to transmit and receive signals, the memory is configured to store a computer program, and the processor is configured to call and run the computer program from the memory, so that the terminal device executes the method in any one of the first to second aspects and possible implementation manners of the first to second aspects.

In a seventh aspect, a network device is provided that includes a transceiver, a processor, and a memory. The processor is configured to control the transceiver to transmit and receive signals, the memory is configured to store a computer program, and the processor is configured to call and execute the computer program from the memory, so that the network device performs the method in any one of the possible implementation manners of the third aspect and the third aspect.

In an eighth aspect, a communication system is provided, which includes the terminal device provided in the fourth aspect and the network device provided in the fifth aspect, or includes the terminal device provided in the sixth aspect and the network device provided in the seventh aspect.

In a ninth aspect, there is provided a computer program product, the computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method of the above-mentioned aspects.

In a tenth aspect, there is provided a computer-readable storage medium for storing a computer program comprising instructions for performing the method in the above aspects.

In an eleventh aspect, there is provided a chip system comprising a processor for invoking and running the computer program from a memory, the computer program for implementing the method in the above aspects.

Drawings

Fig. 1 is a schematic diagram of a wireless communication system suitable for use with embodiments of the present application;

fig. 2 is a schematic flow chart of a method for measuring channel state information provided by an embodiment of the present application;

fig. 3 is a schematic block diagram of a terminal device provided in an embodiment of the present application;

fig. 4 is a schematic block diagram of a network device provided by an embodiment of the present application;

fig. 5 is another schematic block diagram of a terminal device provided in an embodiment of the present application;

fig. 6 is another schematic block diagram of a network device according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, a future fifth Generation (5G) System, or a New Radio Network (NR), etc.

For the convenience of understanding the embodiments of the present application, a communication system applicable to the embodiments of the present application will be first described in detail by taking the communication system shown in fig. 1 as an example. Fig. 1 is a schematic diagram of a wireless communication system 100 suitable for use with embodiments of the present application. As shown in fig. 1, the wireless communication system 100 may include at least one network device, for example, network device # 1111, network device #2112, and network device # 3113 shown in fig. 1, and the wireless communication system 100 may further include at least one terminal device, for example, terminal device 121 shown in fig. 1.

In this wireless communication system 100, one or more of network device # 1111, network device #2112, and network device # 3113 can simultaneously communicate with the terminal device 121. For example, the network device # 1111, the network device #2112 communicate with the terminal device 121 at the same time for a certain period.

It should be understood that the network device in the wireless communication system may be any device having a wireless transceiving function or a chip that can be disposed on the device, and the device includes but is not limited to: evolved Node B (eNB), Radio Network Controller (RNC), Node B (Node B, NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home evolved NodeB, or Home Node B, HNB), BaseBand Unit (Base band Unit, BBU), Access Point (AP) in Wireless Fidelity (WIFI) system, etc., and may also be 5G, such as NR, gbb in system, or TRP, transmission Point (TRP or TP), one or a group of antennas (including multiple antennas, NB, or a transmission panel) of a Base Station in 5G system, such as a baseband unit (BBU), or a Distributed Unit (DU), etc.

In some deployments, the gNB may include a Centralized Unit (CU) and a DU. The gNB may further include a Radio Unit (RU). The CU implements part of the function of the gNB, and the DU implements part of the function of the gNB, for example, the CU implements Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP) layers, and the DU implements Radio Link Control (RLC), Medium Access Control (MAC) and Physical (PHY) layers. Since the information of the RRC layer finally becomes or is converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling or PHCP layer signaling, can also be considered to be transmitted by the DU or by the DU + RU. It will be understood that the network device may be a CU node, or a DU node, or a device comprising a CU node and a DU node. In addition, the CU may be divided into network devices in the access network RAN, or may be divided into network devices in the core network CN, which is not limited herein.

It should also be understood that terminal equipment in the wireless communication system may also be referred to as User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a 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 (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical treatment (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios. The terminal device and the chip that can be installed in the terminal device are collectively referred to as a terminal device in this application.

It should be understood that, for convenience of understanding only, the network device #1 to the network device #3 and the terminal device are schematically illustrated in fig. 1, but this should not limit the present application in any way, a greater or lesser number of network devices may also be included in the wireless communication system, a greater number of terminal devices may also be included, network devices communicating with different terminal devices may be the same network device or different network devices, the number of network devices communicating with different terminal devices may be the same or different, and the present application does not limit the present application.

In a CoMP transmission scenario, the network device generally needs to determine a reasonable transmission scheme and scheduling policy with reference to CSI fed back by the terminal device. The terminal device may perform CSI measurement and feedback according to a reference signal resource indicated by the network device, for example, a channel state information reference signal (CSI-RS) resource. The CSI may include, for example, a Precoding Matrix Indicator (PMI), a Rank Indicator (RI), a Channel Quality Indicator (CQI), and the like.

In the current technology, since the network device does not necessarily know what other network devices are communicating with the terminal device 121 at the same time, for example, the network device # 1111 and the network device #2112 may communicate with the terminal device 121 at the same time for a certain period of time; in another period, the network device # 1111, the network device #2112, and the network device # 3113 may simultaneously communicate with the terminal device 121. The network device may determine a plurality of interference measurement assumption conditions according to other network devices that may have communication connections around the terminal device, and indicate to the terminal device, so that the terminal device performs CSI measurement according to the plurality of interference measurement assumption conditions.

However, the method of indicating the interference measurement assumption condition by the network device may bring large signaling overhead. For example, if S interference measurement assumption conditions exist, S interference measurement assumption conditions may be indicated to the terminal device by S downlink control information, or S interference measurement assumption conditions may be indicated by a plurality of fields in the same downlink control information. In the indication of each interference measurement hypothesis condition, one or more interference measurement resources may be indicated. If there are a plurality of other network devices around the terminal device, which may have communication connections, the number of interference assumption conditions is large, and thus the signaling overhead is also very serious.

In view of this, the present application provides a method for measuring channel state information, which can reduce signaling overhead.

The following describes in detail a method for measuring channel state information provided by an embodiment of the present application with reference to the accompanying drawings.

It should be understood that the measurement method of channel state information provided herein may be applied to a wireless communication system, such as the wireless communication system 100 shown in fig. 1. The terminal device in this embodiment of the present application may communicate with one or more network devices at the same time, for example, the network device in this embodiment of the present application may correspond to one or more of network device # 1111, network device #2112, and network device # 3113 in fig. 1, and the terminal device in this embodiment of the present application may correspond to terminal device 121 in fig. 1.

It should also be understood that the CSI-RS in the embodiments of the present application is a specific form of a reference signal for CSI measurement, and should not constitute any limitation to the present application. In fact, the present application does not exclude the use of other reference signals as CSI measurements, such as demodulation reference signals (DMRSs), or reference signals with the same or similar functions defined in future protocols, etc.

In the following, without loss of generality, the embodiments of the present application are described in detail by taking an interaction process between a terminal device and one or more network devices as an example, where the terminal device may be any terminal device in a wireless communication system and having a wireless connection relationship with the network devices. It can be understood that any terminal device in the wireless communication system may perform CSI measurement and feedback based on the same technical solution, which is not limited in this application.

Fig. 2 is a schematic flow chart of a method 200 for measuring channel state information provided by an embodiment of the present application, which is shown from the perspective of device interaction. As shown, the method 200 shown in fig. 2 may include steps 210 through 240. The method 200 is described in detail below in conjunction with fig. 2.

In step 210, the terminal device receives downlink control information, where the downlink control information carries measurement information for CSI measurement.

Correspondingly, in step 210, the network device transmits downlink control information.

The network device that sends the downlink control information to the terminal device may be a network device that has a communication connection with the terminal device. For example, there may be one or more network devices shown in fig. 1 having a communication connection with terminal device 121, such as one or more of network device # 1111, network device #2112, and network device # 3113. Specifically, when any one network device is to perform data transmission with the terminal device, CSI measurement may be performed in advance by sending a CSI-RS, so as to determine a reasonable transmission scheme and scheduling policy. The number of network devices sending downlink control information to the terminal device is not limited in the present application.

The downlink control information may be dci (downlink control information) defined in the LTE protocol or the NR protocol, or may be other signaling for carrying downlink control information transmitted in a physical downlink control channel. This is not a limitation of the present application.

It should be understood that the physical downlink control channel referred to herein may be a PDCCH (physical downlink control channel) defined in the LTE protocol or the NR protocol, an Enhanced Physical Downlink Control Channel (EPDCCH), or a PDCCH in the NR, and other downlink channels defined with the network evolution and having the above functions. Also, the physical downlink control channel may be a cell-specific reference signal (CRS) -based physical downlink control channel or a DMRS-based physical downlink control channel. The CRS-based physical downlink control channel may be a physical downlink control channel that is demodulated according to the CRS, and the DMRS-based physical downlink control channel may be a physical downlink control channel that is demodulated according to the DMRS. The CRS is a Reference Signal (RS) configured by the network device to all terminal devices in the cell, and the DMRS may be an RS configured by the network device to a specific terminal device and may also be referred to as a terminal device specific Reference Signal. It should be noted that the physical downlink control channel defined in the NR system may be the physical downlink control channel of the DMRS described above.

Alternatively, the downlink control information may be uplink related (uplink related) downlink control information. For example, the downlink control information may be DCI related to uplink in LTE or NR.

In this embodiment, the network device may indicate, to the terminal device, measurement information for CSI measurement through the downlink control information. By way of example and not limitation, the measurement information includes at least indication information of a CSI-RS resource configuration. In other words, the downlink control information carries indication information of CSI-RS resource configuration.

In one possible implementation, the terminal device may acquire a plurality of possible CSI-RS resource configurations in advance through a higher layer signaling (e.g., a Radio Resource Control (RRC) message), for example, the plurality of possible CSI-RS resource configurations may be indicated through a plurality of resource configurations (resource setting). After that, the terminal device may determine the CSI-RS resource according to the indication field of the CSI-RS resource configuration included in the received downlink control information. The indication field may be, for example, an index (index) of resource setting, or indication information that may be used to index resource setting, such as an index in a CSI request (CSI request) field in DCI defined in the LTE protocol or the NR protocol.

Optionally, the measurement information carried in the downlink control information further includes indication information of Codebook Subset Restriction (CSR).

Specifically, the indication information of the codebook subset restriction is used for indicating the restricted codebook subset, which can be understood as the codebook subset currently used by the network device. Wherein the codebook subset may include some or all of the codewords in the codebook.

In one possible design, the indication information of the CSI-RS resource configuration and the indication information of the codebook subset restriction are carried by the same field. Alternatively, the measurement information may be carried in a certain field of the downlink control information. For example, the CSI request field in DCI defined in the LTE protocol or the NR protocol. Specifically, the terminal device may acquire information of the plurality of CSI-RS resource configurations and codebook subset restrictions in advance through higher layer signaling (e.g., RRC message). Wherein the CSI-RS resource configuration may be indicated by resource configuration (resource setting) in RRC, and the codebook restriction subset may be indicated by reporting configuration (reporting setting) in an RRC message. The reporting setting may be used to indicate CSI that needs to be fed back (or reported) and resources used by the feedback CSI. resource setting and reporting setting may have a correspondence, and the correspondence of the two may be indicated by a connection (link). After receiving the RRC message in advance, the terminal device may determine, according to resource setting, reporting setting, and link therein, a mapping relationship between the multiple CSI-RS resources and the multiple codebook subset restrictions, that is, a mapping relationship between the multiple resource setting indexes, the multiple reporting setting indexes, and a one-to-one correspondence relationship between the multiple indexes that may be carried in the CSI request field. The network device may indicate an index of resource setting and an index of reporting setting through one index. After that, the terminal device may determine the indicated resource setting and reporting setting according to the CSI request field in the received DCI and the pre-obtained mapping relationship, and further determine the CSI-RS resource corresponding to the indicated resource setting in the DCI and the codebook subset corresponding to the reporting setting. Since it has been described above that the downlink control information has a one-to-one correspondence relationship with the network device, the terminal device determines the CSI-RS resource and codebook subset according to the downlink control information, that is, the CSI-RS resource and codebook subset used by the network device that transmits the downlink control information.

In this embodiment, the terminal device may perform different types of CSI measurements according to the number of downlink control information received in a preset time period. Specifically, the terminal device may perform step 220 (including step 2201 or step 2202) described below.

In step 220, a piece of downlink control information is received in the preset time period, and the terminal device performs CSI measurement only based on the measurement information carried in the piece of downlink control information, otherwise, performs each CSI measurement based on the measurement information carried in at least two pieces of downlink control information received in the preset time period.

In a possible implementation manner, the terminal device may use a time when the downlink control information is received for the first time as a starting time, a time when the starting time extends backward by a preset time period may be used as an ending time, and a time interval from the starting time to the ending time is a preset time period, which may be understood as a first preset time period for convenience of distinguishing. The terminal device can receive the downlink control information from the network device in real time, after a preset time period is finished, the time when the terminal device receives the downlink control information again can be regarded as the starting time of the next preset time period, and the downlink control information received again can be regarded as the first downlink control information of the next preset time period. The time from the starting time to the ending time after a preset time period is used as the ending time, and the time interval from the starting time to the ending time is a preset time period, which is convenient for distinguishing, can be understood as the next preset time period after the previous preset time period. In other words, the start time of one preset period may be a time when the first downlink control information is received after the end time of the last preset period.

In another possible implementation manner, the terminal device may directly use the time domain resource defined by the communication system as the preset time period. For example, a time unit defined by the communication system is taken as a preset time period. The time unit may be, for example, a subframe, a slot (slot), a radio frame, a micro slot (mini slot or sub slot), multiple aggregated slots, multiple aggregated subframes, a symbol, or the like, or may even be a Transmission Time Interval (TTI), which is not limited in this application. For example, the preset period may be a time slot defined in the communication system.

The terminal device may receive only one downlink control information or may receive a plurality of downlink control information within a preset time period. The terminal device may selectively perform one or both of the following steps 2201 or 2202 according to the amount of downlink control information received within a preset period.

It should be noted that the size of the preset time period may be that the network device notifies the terminal device in advance, for example, the terminal device is notified by signaling after being determined by the network device, or may be predefined, for example, protocol definition.

Alternatively, the preset period may be one or more time units in size. For example, the preset period is one or more time slots.

It should be understood that the size of each time unit listed above may be defined according to the LTE protocol or the NR protocol, or may be defined according to a future protocol, and the size of the time unit is not limited in the present application. It should also be understood that the above listed sizes of the preset time period are only exemplary, and should not limit the application, and the application does not limit the size of the preset time period.

In a preset time period, if the terminal device receives M (M is greater than or equal to 2, M is an integer) downlink control information, the M downlink control information may be from M network devices, in other words, the M downlink control information and the M network devices may have a one-to-one correspondence relationship, each network device may send one downlink control information, and the downlink control information sent by each network device may carry measurement information for CSI measurement. For example, the measurement information carried in the downlink control information sent by the network device #1 in fig. 1 at least includes indication information of CSI-RS resource configuration, so as to indicate a resource location of the CSI-RS sent by the network device #1, or to indicate a resource location for receiving the CSI-RS.

In step 2201, a plurality of pieces of downlink control information are received within a preset time period, and the terminal device performs each CSI measurement based on measurement information carried in at least two pieces of downlink control information received within the preset time period.

Specifically, the terminal device may perform each CSI measurement based on measurement information carried by N (M is greater than or equal to N is greater than or equal to 2, N is an integer) downlink control information in M downlink control information received in a preset time period to obtain a plurality of CSI, where each CSI in the plurality of CSI may be obtained by performing CSI measurement based on measurement information carried by at least two downlink control information received in the preset time period. The multiple pieces of CSI may be obtained by performing CSI measurement on multiple pieces of network equipment, and the multiple pieces of network equipment may be network equipment corresponding to part or all of the N pieces of downlink control information. Also, the number of downlink control information on which any two CSI measurements are based may be different. That is, the value of the number N of downlink control information to be based on may be different in a plurality of CSI measurements.

Or in other words, the terminal device may perform multiple CSI measurements on multiple pieces of downlink control information received within a preset time period, where each CSI measurement may be performed based on measurement information carried by at least two pieces of downlink control information in the multiple pieces of downlink control information, that is, each CSI measurement may be performed on one network device in the multiple network devices.

In this embodiment of the present application, if a terminal device receives M pieces of downlink control information within a preset time period, it may be considered that the terminal device receives the downlink control information from M pieces of network devices within the preset time period. The terminal device may perform each CSI measurement based on measurement information carried in N pieces of downlink control information among the M pieces of downlink control information. For ease of differentiation and illustration, the plurality of network devices may include, for example, a first network device and a second network device.

That is, step 210 may specifically include:

2101, the terminal device receives downlink control information from the first network device within a preset time period;

in step 2102, the terminal device receives downlink control information from the second network device within a preset time period.

After the first network device and the second network device respectively send the downlink control information to the terminal device, it is possible to send CSI-RS based on the CSI-RS resource indicated in the respective sent downlink control information so that the terminal device can perform CSI measurement, thereby preparing for subsequent resource scheduling and the like. When multiple network devices respectively transmit CSI-RSs to a terminal device, for any one of the multiple network devices, the CSI-RSs transmitted by other network devices may become interference signals of the network device. For example, the CSI-RS transmitted by the first network device may become an interference signal of the second network device, and the CSI-RS transmitted by the second network device may become an interference signal of the first network device. Therefore, the terminal device may perform CSI measurement on the plurality of network devices respectively to obtain a plurality of CSI to be fed back to the plurality of network devices, and each CSI in the plurality of CSI may be obtained by measurement based on measurement information carried in the plurality of downlink control information.

It should be understood that, for convenience of description, the first network device and the second network device are taken as an example to illustrate the process of sending downlink control information and CSI-RS to the terminal device by multiple network devices, but this should not limit the present application in any way, and the terminal device may also receive downlink control information sent by more or fewer network devices within a preset time period. The number of the network devices sending the downlink control information to the terminal device is not limited, or the number of the downlink control information received by the terminal device is not limited.

In step 2201, the terminal device may perform each CSI measurement based on the measurement information carried in the N pieces of downlink control information. Specifically, the terminal device may perform CSI measurement for the mth (M is greater than 0 and less than or equal to M) downlink control information of the M downlink control information based on the measurement information carried in the N downlink control information. Here, the mth downlink control information among the M downlink control information and the nth downlink control information among the N downlink control information may have a correspondence relationship.

For example, the terminal device receives 5 pieces of downlink control information in a preset time period, that is, M is 5, and for convenience of distinction and explanation, the following are respectively noted: downlink control information #1, downlink control information #2, downlink control information #3, downlink control information #4, and downlink control information # 5. The terminal device may perform CSI measurement based on 3 downlink control information of the 5 downlink control information, that is, N is 3. The 3 pieces of downlink control information may be downlink control information #1, downlink control information #3, and downlink control information #5 among the 5 pieces of downlink control information. The terminal device may correspond an mth one of the M downlink control information to an nth one of the N downlink control information according to a preset rule. For example, according to the descending control information number from small to large, descending control information #1 in the 5 descending control information is the 1 st descending control information in the 5 descending control information, descending control information #2 in the 5 descending control information is the 2 nd descending control information in the 5 descending control information, and so on. Similarly, downlink control information #1 of the 3 pieces of downlink control information is the 1 st downlink control information of the 3 pieces of downlink control information, downlink control information #3 of the 3 pieces of downlink control information is the 2 nd downlink control information of the 3 pieces of downlink control information, and downlink control information #5 of the 3 pieces of downlink control information is the 3 rd downlink control information of the 3 pieces of downlink control information. In other words, the 1 st downlink control information of the N downlink control information is the 1 st downlink control information of the M downlink control information, the 2 nd downlink control information of the N downlink control information is the 3 rd downlink control information of the M downlink control information, and the 3 rd downlink control information of the N downlink control information is the 5th downlink control information of the M downlink control information. It should be understood that the foregoing examples are merely illustrated for convenience of understanding, and should not limit the present application in any way, and the present application does not limit the rule for determining the corresponding relationship between the nth downlink control information of the N downlink control information and the mth downlink control information of the M downlink control information.

Wherein, M may take one or more values in [1, M ], that is, the terminal device may perform CSI measurement respectively for one or more of the M pieces of downlink control information, or the terminal device may perform CSI measurement respectively for one or more of the M pieces of network devices corresponding to the M pieces of downlink control information; m may also take each value in [1, M ], that is, the terminal device may perform CSI measurement on each downlink control information in the M downlink control information, or the terminal device may perform CSI measurement on each network device in the M network devices, which is not limited in this application.

In the CSI measurement process for the nth downlink control information, a CSI-RS resource indicated by downlink control information other than the nth downlink control information in the N downlink control information may be used as an interference measurement resource of the CSI-RS resource indicated by the nth downlink control information. The CSI-RS resources indicated by the remaining N-1 downlink controls in the N downlink control information except the nth downlink control information may be interference measurement resources of the CSI-RS resources indicated by the nth downlink control information. In other words, in the process of performing CSI measurement on the nth downlink control information based on the measurement information carried in the N downlink control information, part or all of the CSI-RS resources indicated by M-1 downlink control information except the nth downlink control information in the N downlink control information may be interference measurement resources of the CSI-RS resources indicated by the nth downlink control information.

In this application, for convenience of differentiation, CSI measurement combining measurement information carried in multiple pieces of downlink control information may be referred to as multi-site-based CSI measurement. The multi-site based CSI measurement may be understood as one measurement type of CSI.

In particular, the terminal device may perform CSI measurements in conjunction with CSI-RSs from a certain network device (e.g., a first network device) and CSI-RSs from one or more other network devices (e.g., a second network device). If the CSI measurement is for the first network device, the measured CSI is fed back to the first network device. For the first network device, the CSI-RS from the second network device may be considered an interfering signal. The terminal device may perform CSI measurement according to the CSI-RS resource of the first network device and the CSI-RS resource of the second network device to obtain CSI to be fed back, for example, CQI.

Further, the terminal device may also perform CSI measurement with reference to a codebook subset indicated by multiple downlink control information. In the case that the terminal device receives M pieces of downlink control information, the terminal device may perform CSI measurement based on a codebook subset indicated by at least two pieces of downlink control information in the M pieces of downlink control information. Among the M pieces of downlink control information, part or all of CSI-RS resources indicated by the remaining M-1 pieces of downlink control information except the nth piece of downlink control information among the N pieces of downlink control information may be interference measurement resources of the CSI-RS resources indicated by the nth piece of downlink control information. The codebook subset indicated by the downlink control information except the nth downlink control information in the N downlink control information can be used for precoding the CSI-RS which is the interference signal, and the codebook subset indicated by the nth downlink control information in the N downlink control information can be used for precoding the CSI-RS which is carried on the CSI-RS resource indicated by the nth downlink control information. Specifically, the terminal device may traverse the codebook subset indicated by the N-1 downlink control information except the nth downlink control information to precode the interference signal, and traverse the codebook subset indicated by the nth downlink control information to precode the CSI-RS corresponding to the nth downlink control information. The correspondence between the nth downlink control information of the N downlink control information and the mth downlink control information of the M downlink control information has been described in detail above with reference to the example, and is not described herein again. By taking the value of M in [1, M ], for example, M may take one or more values in [1, M ], or each value in [1, M ], so as to determine an optimal precoding matrix, that is, to determine CSI to be fed back, for example, PMI.

It should be noted that the number of downlink control information for determining the interference measurement resource and the number of downlink control information corresponding to the codebook subset for precoding the interference signal may be the same or different.

For example, the terminal device may precode the CSI-RS (for convenience of distinguishing and illustration, for example, referred to as the first CSI-RS) transmitted by the first network device according to the codebook subset of the first network device (for convenience of distinguishing and illustration, referred to as the first codebook subset) to obtain the precoded first CSI-RS, and precode the CSI-RS (for convenience of distinguishing and illustration, referred to as the second CSI-RS) transmitted by the second network device according to the codebook subset of the second network device (for convenience of distinguishing and illustration, for example, referred to as the second CSI-RS) to obtain the precoded second CSI-RS. And then, respectively taking the precoded first CSI-RS as interference signals of the precoded second CSI-RS, taking the precoded second CSI-RS as the precoded first CSI-RS as interference signals of the precoded first CSI-RS, respectively calculating the CQI corresponding to the first network equipment and the CQI corresponding to the second network equipment, respectively traversing the first codebook subset and the second codebook subset, respectively determining one precoding matrix in the first codebook subset and one precoding matrix in the second codebook subset which are respectively used when the CQIs corresponding to the two network equipment reach the optimal value, and respectively feeding back the two precoding matrices to the network equipment.

It should be noted that the first network device and the second network device are named only for convenience of distinction, and should not limit the present application in any way. The first network device and the second network device may be opposite, the first network device may be a network device for which the terminal device performs CSI measurement, may be any one of network devices in the cooperation set, and after determining the first network device, the second network device may be one or more network devices in the cooperation set other than the first network device. Here, a cooperating set is understood to be a set of potential network devices that may subsequently perform data transmission with the terminal device.

For example, in the wireless communication system 100 shown in fig. 1, if the network device #1, the network device #2, and the network device #3 all transmit CSI-RS to the terminal device within a certain period, that is, the network device #1, the network device #2, and the network device #3 may all transmit data with the terminal device in the following. The terminal device may be performing CSI measurements for network device #1, network device #2, and network device #3, respectively. If CSI measurement is performed for network device #1, network device #1 may be a first network device, and network devices #2 and #3 may be second network devices; if CSI measurement is performed for network device #2, network device #2 may be a first network device, and network devices #1 and #3 may be second network devices; and so on.

If the terminal device performs CSI measurement for the network device #1, the CSI-RS from the network device #1 may be used as a target signal, and the CSI-RS from the network device #2 and the network device #3 may be used as interference signals to perform CSI measurement, where the CSI obtained by the CSI measurement is CSI fed back to the network device # 1. Here, the network device #1 may be understood as one example of the first network device, and the network devices #2 and #3 may be understood as two examples of the second network device.

When the terminal device receives a plurality of pieces of downlink control information within a preset time period, optionally, each piece of downlink control information in the plurality of pieces of downlink control information carries a reporting setting. That is to say, each piece of downlink control information may carry indication information of a resource setting and indication information of a reporting setting, where the resource setting and the reporting setting may be indicated by the same indication information.

Optionally, only one downlink control information of the plurality of downlink control information carries a plurality of reporting setting. That is to say, each piece of downlink control information may carry indication information of one resource setting, but only one piece of downlink control information may carry indication information of multiple reporting settings, where the indication information of multiple reporting settings is used to indicate multiple reporting settings, and the multiple reporting settings may be in one-to-one correspondence with multiple network devices corresponding to the multiple pieces of downlink control information and may be used to indicate resources that respectively need to feed back CSI and CSI to the multiple network devices. Optionally, the multiple reporting setting may be further configured to indicate multiple CSRs, the multiple CSIs may correspond to multiple network devices one-to-one, and the codebook subset used by each network device may be indicated by one CSR.

Optionally, only one piece of downlink control information in the plurality of pieces of downlink control information carries a reporting setting. That is, each piece of downlink control information may carry one resource setting indication information, but only one piece of downlink control information (for convenience of distinction and explanation, referred to as downlink control information # a) may carry one reporting setting indication information, which indicates one reporting setting, and the reporting setting may be used to indicate CSI (for example, including but not limited to one or more of PMI, CQI, or RI) that needs to be fed back and resources for feeding back CSI, that is, the types of CSI measured and reported for each network device may be the same, and CSI measured for a plurality of network devices may be fed back to the same network device, for example, the network device that sends the downlink control information # a, through the indicated resources for feeding back CSI. Optionally, the reporting setting may also be used to indicate one CSR, i.e., multiple network devices may use the same codebook subset.

It should be noted that, when the terminal device receives multiple pieces of downlink control information within a preset time period, each CSI measurement may be performed based on measurement information carried in the multiple pieces of downlink control information, that is, based on CSI measurement of multiple stations, and each CSI measurement may be performed independently based on measurement carried in each piece of downlink control information in the multiple pieces of downlink control information, that is, based on CSI measurement of a single station. More CSI feedback can be obtained from the network equipment, so that the network equipment can determine a reasonable transmission scheme and a scheduling strategy.

In step 2202, one piece of downlink control information is received in a preset time period, and the terminal device performs CSI measurement based on only measurement information carried in the one piece of downlink control information.

In the embodiment of the present application, if a terminal device receives a piece of downlink control information within a preset time period, it may be considered that the terminal device receives only downlink control information from a network device (for convenience of differentiation and description, referred to as a third network device) within the preset time period.

That is, step 210 may specifically include:

step 2103, the terminal device receives the downlink control information from the third network device within a preset time period.

That is, the terminal device may transmit data only with this network device in the next period, and thus the terminal device may receive only the CSI-RS from the third network device. For this third network device, the signals of the other network devices are all considered to be noise signals. Therefore, the terminal device may perform CSI measurement on the third network device to obtain CSI to be fed back, where the CSI may be measured based on only measurement information carried in one piece of downlink control information.

In this application, for convenience of differentiation, CSI measurement based on measurement information carried in one piece of downlink control information may be referred to as CSI measurement based on a single station. A single-site based CSI measurement may be understood as another measurement type of CSI.

It should be noted that the third network device is named only for the convenience of distinguishing from the first network device and the second network device, and should not limit the present application in any way. The third network device is not associated with the first network device and the second network device. The third network device may be any network device in the wireless communication system that transmits downlink control information to the terminal device.

For example, in the wireless communication system 100 shown in fig. 1, if the terminal device only receives the downlink control information from the network device #1 within a preset time period, the network device #1 may be an example of a third network device. If network device #3 sends CSI-RS to the terminal device during a certain period, that is, network device #3 may transmit data with the terminal device during the next period, so the terminal device can perform CSI measurement for network device # 3.

It should be understood that the above steps 2201 and 2202 are described in detail in conjunction with the network device in fig. 1 for ease of understanding and explanation only, but this should not limit the present application in any way. For example, the terminal device may also receive downlink control information from more or fewer network devices within a preset time period. No matter which network device the terminal device receives the downlink control information from within the preset time period, the terminal device may perform CSI measurement according to the method described in step 2201 or step 2202 above.

Based on the above technical scheme, the terminal device may perform CSI measurement by using different measurement types according to the number of downlink control signals received in a preset time period. Therefore, the additional signaling overhead of the network equipment is not needed to indicate various interference measurement assumed conditions, but the terminal equipment autonomously determines the measurement type, so that the signaling overhead can be greatly saved. In addition, the determined measurement type can obtain more accurate CSI feedback to the network equipment, so that the network equipment is facilitated to determine a reasonable transmission scheme and a scheduling strategy, namely, the reliability of data transmission is improved, and the system performance is improved.

Optionally, the method 200 further comprises: and the terminal equipment determines the quantity of the received downlink control information in a preset time period according to the signal strength of the received downlink control information and a preset threshold.

When receiving the downlink control information, the terminal device may erroneously receive the downlink control information sent to other terminal devices, and the erroneously received downlink control information is mistaken as the downlink control information sent to the terminal device itself, and is counted in the number of the downlink control signals received within the preset time period, thereby possibly causing an error in the selection of the measurement type by the terminal device. In this case, the terminal device may not receive the CSI-RS transmitted by the network device corresponding to the downlink control information. That is, the downlink control information erroneously received by the terminal device should not be counted in the number of downlink control signals received within the preset time period. In order to avoid that the terminal device selects an incorrect measurement type for CSI measurement, the terminal device may determine the number of downlink control signals received within a preset time period according to the signal strength of the received downlink control information and a preset threshold.

Specifically, when the signal strength of a certain downlink control information received by the terminal device in a preset time period is greater than or equal to a preset threshold, the received downlink control information may be counted into the number of downlink control information received in the preset time period; when the signal strength of a certain downlink control information received by the terminal device in a preset time period is smaller than a preset threshold, the received downlink control signal can be ignored and not included in the number of the downlink control information received in the preset time period.

The preset threshold may be notified to the terminal device through a signaling after the network device determines the preset threshold, or may be predefined, for example, a protocol definition.

It should be understood that, the determination of the number of the downlink control information received by the terminal device within the preset time period according to the signal strength of the downlink control signal and the preset threshold is only one possible implementation manner, and should not constitute any limitation to the present application. The terminal device may also determine the amount of the downlink control information received in the preset time period based on other methods.

Optionally, the method 200 further comprises: the terminal equipment receives first indication information, and the first indication information indicates whether CSI measurement is carried out based on measurement information carried in at least two pieces of downlink control information.

In other words, the first indication information indicates whether to perform CSI measurement based on measurement information carried in one downlink control information, or the first indication information indicates whether to perform CSI measurement based on measurement information carried in one downlink control information or perform CSI measurement based on measurement information carried in at least two downlink control information.

Alternatively, the first indication information may be used to indicate the measurement type. The measurement type may include single-site-based CSI measurement or multi-site-based CSI measurement, where in the single-site-based CSI measurement, the CSI measurement is performed based on measurement information carried in one piece of downlink control information, and in the multi-site-based CSI measurement, each CSI measurement is performed based on measurement information carried in a plurality of pieces of downlink control information.

In this embodiment, the first indication information may be sent by any network device that has a communication connection with the terminal device, for example, a network device that establishes an RRC connection with the terminal device. Optionally, the first indication information may be carried by one or more signaling in an RRC message, a Media Access Control (MAC) Control Element (CE), or downlink control information. The terminal device may perform corresponding CSI measurement according to the measurement type indicated by the first indication information.

In one possible design, the first indication information may be an indication bit. For example, the network device and the terminal device may agree in advance, and when the indication bit is "1", the indication measurement type is CSI measurement based on measurement information carried in at least two pieces of downlink control information, or CSI measurement based on multiple stations; when the indication bit is "0", the indication measurement type is CSI measurement based on measurement information carried in one piece of downlink control information, or CSI measurement based on a single station. It should be understood that, for ease of understanding only, one possible form of the first indication information is schematically presented here, but this should not constitute any limitation to the present application, and the first indication information may also be in other forms to indicate the measurement type, for example, by different fields in the same signaling, etc.

In this embodiment of the present application, the terminal device may select a measurement type to perform CSI measurement, according to the number of downlink control information received in a preset time period and the first indication information. Specifically, if the terminal device receives multiple pieces of downlink control information within a preset time period and the measurement type indicated by the first indication information is CSI measurement based on measurement information carried in at least two pieces of downlink control information, the terminal device may perform CSI measurement according to the measurement information carried in the received multiple pieces of downlink control information; if the terminal device receives a piece of downlink control information in a preset time period and the measurement type indicated by the first indication information is CSI measurement based on measurement information carried in the piece of downlink control information, the terminal device can perform CSI-based measurement according to the measurement information carried in the received piece of downlink control information; if the terminal device receives a plurality of pieces of downlink control information in a preset time period, and the measurement type indicated by the first indication information is CSI measurement performed based on measurement information carried in one piece of downlink control information, the terminal device may perform CSI measurement based on measurement information in each piece of downlink control information in the plurality of pieces of received downlink control information, that is, perform CSI measurement for each piece of downlink control information; if the terminal device receives one piece of downlink control information in a preset time period, and the measurement type indicated by the first indication information is CSI measurement based on measurement information carried in at least two pieces of downlink control information, the terminal device may perform CSI measurement in combination with another one or more pieces of downlink control information received before, or the terminal device may wait for another one or more pieces of downlink control information received subsequently to perform CSI measurement.

In one possible implementation manner, the terminal device may determine the downlink control information received before or after the preset time period according to a predetermined time threshold. Specifically, assuming that the terminal device only receives one piece of downlink control information in a preset time period #1, but the measurement type indicated by the network device is CSI measurement based on measurement information carried in at least two pieces of downlink control information, the terminal device may extend a time threshold forward at the start time of the preset time period #1, and perform CSI measurement in combination with one or more pieces of downlink control information received in a time period covered by the time threshold; or, the terminal device may extend a duration threshold backward at the end time of the preset time period #1, and perform CSI measurement in combination with one or more pieces of downlink control information received in the time period covered by the duration threshold.

If the terminal device does not receive the downlink control information in the time period covered by the forward extension time length threshold or the backward extension time length threshold, CSI measurement may be performed based on measurement information carried in one downlink control information, or measurement is not performed.

It should be understood that the above-mentioned time length threshold may be notified to the terminal device by the network device in advance, may also be determined by the terminal device itself, and may also be predefined, for example, a protocol definition, which is not limited in this application.

Therefore, the terminal device can perform the CSI measurement according to the measurement type indicated by the network device, so that the autonomy of the network device is enhanced, and the network device can indicate the terminal device to perform the corresponding CSI measurement according to the current requirement, so that the network device determines a reasonable transmission scheme and a scheduling strategy, and the reliability of data transmission is improved.

Optionally, the method 200 further comprises:

step 230, the terminal device sends CSI, which is measured based on measurement information carried in one or at least two pieces of downlink control information.

Specifically, the terminal device may carry CSI through CSI reporting. Specifically, the terminal device may feed back CSI to the network device through any one of the following implementations, and for convenience of differentiation and explanation, CSI reports involved in different implementations are respectively referred to as a first CSI report and a second CSI report. It should be understood that the first CSI report and the second CSI report are only named for convenience of different feedback manners, and should not constitute any limitation on the order of CSI transmission, the number of CSI, and the like.

The implementation mode is as follows:

in one possible implementation, a CSI report (e.g., referred to as a first CSI report) may include a first field that may be used to carry one or more CSI. In one or more CSI carried in the first field, each CSI may be measured based on measurement information carried in one piece of downlink control information, that is, CSI obtained based on CSI measurement of a single station; or the CSI may be obtained by measuring based on measurement information carried in at least two pieces of downlink control information, that is, CSI obtained by measuring based on CSI of multiple stations.

In this implementation, regardless of which measurement type the CSI is measured by, the CSI may be carried in the same field. Since the CSI measurement may be a CSI measurement based on measurement information carried in one piece of downlink control information or a CSI measurement based on measurement information carried in at least two pieces of downlink control information, but the network device may not know which measurement type is used for the received CSI, the terminal device may indicate the measurement type of the CSI measurement while feeding back the CSI. Specifically, the terminal device may indicate the measurement type of the CSI carried in the first field to the network device by means of an explicit indication or an implicit indication.

A. Explicit indication:

optionally, the first CSI report may further include a second field for indicating a measurement type based on the CSI carried in the first field. For example, the second field may be an indication field with one bit, and when the indication field is set to "1", the second field may indicate that the CSI carried by the first field is measured based on measurement information carried in at least two pieces of downlink control information; when the indication field is set to "0", it may indicate that the CSI carried by the first field is measured based on measurement information carried in one piece of downlink control information.

In this implementation, the terminal device may load both CSI obtained by the two measurement types in the same field, and indicate the measurement type through an indication bit agreed in advance with the network device, and when receiving the first CSI, the network device may determine a reasonable transmission scheme and scheduling policy according to the measurement type indicated in the second field and the CSI loaded in the first field.

Still further, when feeding back CSI, the terminal device may determine, according to the information received in advance, a CSI feedback resource, and send CSI on the CSI feedback resource. For example, the terminal device may determine the CSI feedback resource according to the CSI reporting setting indicated by the downlink control information received in step 210. As already described above, each piece of downlink control information may carry indication information of one CSI reporting setting, or may carry indication information of multiple CSI reporting settings only by one piece of downlink control information, or may also carry indication information of one CSI reporting setting only by one piece of downlink control information.

If each piece of downlink control information carries indication information of one CSI reporting setting, each piece of downlink control information may indicate a CSI feedback resource, and the terminal device may feed back a corresponding CSI based on the CSI feedback resource indicated by each piece of downlink control information, for example, the CSI measured for the nth piece of downlink control information is reported through the CSI feedback resource indicated in the nth piece of downlink control information.

If only one piece of downlink control information carries indication information of multiple CSI reporting settings, the downlink control information may indicate multiple CSI feedback resources, the multiple CSI feedback resources may correspond to the multiple CSIs one to one, and the terminal device may feed back the corresponding CSI on each CSI feedback resource.

If only one piece of downlink control information carries one piece of CSI reporting setting indicating information, the downlink control information may indicate one CSI feedback resource, and the terminal device may report the CSI obtained by each CSI measurement through the CSI feedback resource indicated by the downlink control information.

In other words, when the terminal device may feed back CSI to the network device, the CSI measured for a certain network device may be fed back to the network device, for example, the CSI measured for a first network device may be fed back to the first network device; the terminal device may also feed back CSI obtained by measuring one or more network devices to the same network device, where the network device may be a network device indicating a resource for feeding back CSI, and may send the CSI to network devices corresponding to CSI through the network device. For example, CSI measured for the first network device and the second network device, respectively, is fed back to the serving network device.

Optionally, step 230 specifically includes:

the terminal device sends a plurality of first CSI reports, where a first field in each of the plurality of first CSI reports includes one CSI, and the CSI may be measured based on measurement information carried in at least two pieces of downlink control information, or may be measured based on measurement information carried in one piece of downlink control information.

That is, step 230 specifically includes one or more of step 2301, step 2302, and step 2303:

step 2301, the terminal device sends a first CSI report to the first network device, where the first CSI report carries CSI measured by the first network device (for convenience of differentiation and explanation, referred to as CSI # 1);

in step 2302, the terminal device sends a first CSI report to the second network device, where the first CSI report carries CSI measured for the second network device (for convenience of differentiation and illustration, referred to as CSI # 2).

Alternatively, step 230 specifically includes:

in step 2303, the terminal device sends a first CSI report to the third network device, where the first CSI report carries CSI measured by the third network device (for convenience of differentiation and illustration, it is referred to as CSI # 3).

The CSI (for example, including CSI #1, CSI #2, and CSI #3) may be measured based on measurement information carried in at least two pieces of downlink control information, or may be measured based on measurement information carried in one piece of downlink control information.

It should be understood that, for convenience of understanding only in the foregoing and in the drawings, the steps of sending CSI to the first network device, the second network device and the third network device by the terminal device are schematically illustrated by taking the first network device, the second network device and the third network device as examples, but this should not limit the present application in any way, in an actual implementation process, the terminal device may perform one or more of steps 2301 to 2303, and may also perform more steps besides steps 2301 to 2303, for example, sending CSI to more network devices.

It should also be understood that the specific steps of the terminal device feeding back the CSI to the network device in one implementation are only exemplarily shown in the drawings, but this should not limit the present application in any way, and the specific method of the terminal device feeding back the CSI to the network device is not limited to the steps shown in the drawings.

When the terminal equipment sends a plurality of first CSI reports, a first field in each first CSI report can carry CSI measured based on one or more downlink control information.

In one possible case, the terminal device receives multiple pieces of downlink control information within a preset time period, the network device does not indicate the measurement type, or the network device indicates that the measurement type is CSI measurement based on measurement information carried in at least two pieces of downlink control information, and the terminal device may perform CSI measurement based on the measurement information carried in at least two pieces of downlink control information in the multiple pieces of downlink control information and report CSI corresponding to each network device.

In another possible case, the terminal device receives multiple pieces of downlink control information in a preset time period, and the network device indicates that the measurement type is CSI measurement based on measurement information carried in one piece of downlink control information, and then the terminal device performs CSI measurement based on the measurement information carried in each piece of downlink control information, and reports CSI corresponding to each network device.

In another possible case, the terminal device receives multiple pieces of downlink control information within a preset time period, but the terminal device may perform CSI measurement and feedback only for a network device corresponding to one of the pieces of downlink control information, where the CSI measurement may be based on measurement information carried in one piece of downlink control information or based on measurement information carried in at least two pieces of downlink control information, and a measurement result may be reported to the network device to which each measurement is directed. It is to be understood that the above list may be given only as illustrative illustration for the sake of understanding, and should not constitute any limitation to the present application.

Or, optionally, step 230 specifically includes:

the terminal device sends a first CSI report, where a first field in the first CSI report may include at least one CSI measured based on measurement information carried by one piece of downlink control information, or at least one CSI measured based on measurement information carried by at least two pieces of downlink control information.

In one possible case, when the terminal device receives one piece of downlink control information within a preset time period, the network device does not indicate the measurement type, or the network device indicates that the measurement type is CSI measurement based on measurement information carried in one piece of downlink control information, the terminal device performs CSI-based measurement based on the measurement information carried in the one piece of downlink control information. In this case, the terminal device may feed back the measured CSI to the network device, or to the same network device, e.g., a serving network device.

Another possible situation is that the terminal device receives multiple pieces of downlink control information within a preset time period, the network device does not indicate the measurement type, or the network device indicates that the measurement type is CSI measurement based on measurement information carried in at least two pieces of downlink control information, and then the terminal device performs CSI-based measurement based on the measurement information carried in the at least two pieces of downlink control information received within the preset time period; in another possible case, the terminal device receives multiple pieces of downlink control information within a preset time period, and the network device indicates that the measurement type is CSI measurement based on measurement information carried in one piece of downlink control information, and then the terminal device performs CSI measurement based on the measurement information carried in each piece of downlink control information. In these two cases, when the terminal device receives multiple pieces of downlink control information in a preset time period, the terminal device may perform CSI measurement based on a single site or perform CSI measurement based on multiple sites based on measurement information carried in at least two pieces of downlink control information received in the preset time period, and the measured CSI may be fed back to the same network device, for example, a serving network device.

For example, assume that the terminal device performs multi-site-based CSI measurement for the first network device and the second network device respectively, to obtain CSI #1 for the first network device and CSI #2 for the second network device. The terminal device may carry both CSI #1 and CSI #2 in a first field of one first CSI report and send the first CSI report to a serving network device of the terminal device. Alternatively, the terminal device may carry CSI #1 in the first CSI report transmitted to the first network device and CSI #2 in the first CSI report transmitted to the second network device.

It is assumed that the terminal device performs CSI measurement based on a single site only for the third network device, resulting in CSI #3 for the third network device. The terminal device may carry CSI #3 in the first field of the first CSI report and send the first CSI report to the third network device or to the serving network device.

It should be understood that the foregoing lists several possibilities for ease of understanding only, and should not be construed as limiting the present application in any way.

B. Implicit indication:

a first field in the first CSI report may be used to carry CSI obtained based on measurement information carried in at least two pieces of downlink control information, that is, CSI obtained based on CSI measurement of multiple stations, or the first field may be used to carry a predefined value; the predefined value is used for implicitly indicating that the terminal equipment does not perform CSI measurement based on measurement information carried in at least two pieces of downlink control information.

In this implementation manner, the terminal device may only report CSI obtained by CSI measurement based on multiple sites, and when performing CSI measurement based on a single site, the terminal device may implicitly indicate, through a predefined value agreed in advance with the network device, that the CSI measured by the terminal device is not obtained by CSI measurement based on multiple sites, that is, the terminal device does not report the CSI measured by CSI measurement based on the single site.

Still further, the number of CSI carried in the first field may be one or more, which is not limited in this application. When feeding back CSI to the network device, the terminal device may feed back CSI measured for a certain network device to the network device, for example, feed back CSI measured for a first network device to the first network device; the terminal device may also feed back CSI measured for one or more network devices to the same network device, for example, feed back CSI measured for a first network device and a second network device to a serving network device.

Optionally, step 230 specifically includes:

the terminal equipment sends a first CSI report, wherein the first CSI report comprises a first field, and the first field comprises at least one CSI measured based on at least two pieces of downlink control information or a predefined value; the predefined value implicitly indicates that the terminal device does not perform CSI measurement based on measurements carried in the at least two downlink control information. In other words, if the first field carries the predefined value, it indicates that the terminal device may perform CSI measurement based on a single station based on measurement information carried in one piece of downlink control information. In this case, the terminal device may not report CSI obtained based on CSI measurement of a single station.

Optionally, step 230 specifically includes:

the terminal equipment sends a plurality of first CSI reports, wherein each first CSI report in the plurality of first CSI reports comprises a first field, and the first field comprises CSI obtained by measurement based on measurement information carried by at least two pieces of downlink control information or a predefined value; the predefined value implicitly indicates that the terminal device does not perform CSI measurement based on measurements carried in the at least two downlink control information.

In the implicit indication mode, the specific process of the terminal device feeding back the CSI to the network device is similar to the specific process of the terminal device feeding back the CSI to the network device in the indication display mode, and the specific process has been described in detail in combination with different situations, and is not described herein again for brevity.

The second implementation mode,

In another possible implementation manner, the CSI report (for example, referred to as a second CSI report) may include a third field and a fourth field, where the third field may be used to carry CSI measured based on measurement information carried by one or at least two pieces of downlink control information, that is, CSI measured based on single-site CSI or CSI measured based on multi-site CSI, and the fourth field is only used to carry CSI measured based on measurement information carried by one piece of downlink control information, that is, CSI measured based on single-site CSI.

As described above, in the case that the terminal device receives multiple pieces of downlink control information within the preset time period, the terminal device may perform CSI measurement based on multiple sites based on measurement information carried in at least two pieces of downlink control information received within the preset time period, and may also perform CSI measurement based on a single site based on measurement information carried in each piece of downlink control information. In this case, CSI obtained based on CSI measurement of multiple sites may be carried in the third field, and CSI obtained based on CSI measurement of a single site may be carried in the fourth field.

The CSI obtained by only carrying CSI measurement based on measurement information carried in one piece of downlink control information in the fourth field may be pre-agreed by the network device and the terminal device, and when the network device receives the second CSI, the CSI in the fourth field may be determined as CSI measurement based on a single site. Since the network device may not know whether the CSI carried by the third field in the received second CSI report is based on the single-site CSI measurement or the multi-site CSI measurement, the network device may indicate a measurement type on which the CSI carried by the third field is based while feeding back the CSI. In particular, the terminal device may indicate to the network device the measurement type of the CSI carried in the first field by means of an explicit indication or an implicit indication.

A. Explicit indication:

optionally, the second CSI report may further include a fifth field for indicating a measurement type on which CSI carried in the third field is based. For example, the fifth field may be an indication field with one bit, and when the indication field is set to "1", the fifth field may indicate that the CSI carried by the third field is measured based on measurement information carried in at least two pieces of downlink control information, that is, based on CSI measurement of multiple stations; when the indication field is set to "0", it may be indicated that the CSI carried by the third field is measured based on measurement information carried in one piece of downlink control information, that is, based on CSI measurement of a single station.

In this implementation, the terminal device may carry the CSI obtained based on the measurement of the two measurement types in the second CSI report, and indicate the measurement type by using an indication bit predetermined with the network device, and when receiving the second CSI report, the network device may determine a reasonable transmission scheme and a scheduling policy according to the measurement type based on the CSI in the third field and the CSI carried in the third field and the fourth field, which are indicated in the fifth field.

B. Implicit indication:

the network device and the terminal device may agree in advance that CSI based on measurement information carried by a plurality of pieces of downlink control information is preferentially carried in the third field, that is, if the terminal device obtains CSI through CSI measurement based on multiple stations (for convenience of differentiation, for example, it is referred to as CSI # a), the CSI # a is preferentially carried in the third field, and the terminal device may simultaneously obtain CSI through CSI measurement based on a single station (for convenience of differentiation and description, for example, it is referred to as CSI # B), and the CSI # B is carried in the fourth field. If the terminal device does not perform multi-site CSI measurement, but only obtains CSI (for example, CSI # B) through single-site CSI measurement, the CSI # B may be simultaneously carried in the third field and the fourth field. When receiving the second CSI report, the network device may compare information carried in the third field and the fourth field, and under the condition that the information carried in the third field and the fourth field are different, consider that the terminal device performs CSI measurement based on multiple sites, where the CSI carried in the third field is obtained based on the CSI measurement of multiple sites; under the condition that the information carried in the third field and the fourth field is the same, the terminal device is considered to perform multi-site-based CSI measurement, and CSI is obtained only through single-site-based CSI measurement.

In this implementation, the terminal device does not need additional bit overhead to indicate the measurement type on which the CSI carried in the third field is based.

Still further, the number of CSI carried in the third field and the fourth field may be one or more, which is not limited in this application. When the terminal device may feed back the CSI to the network device, the CSI measured for a certain network device may be fed back to the network device, for example, the CSI measured for a first network device may be fed back to the first network device; the terminal device may also feed back CSI measured for one or more network devices to the same network device, for example, feed back CSI measured for a first network device and a second network device to a serving network device.

Optionally, step 230 specifically includes:

the terminal device sends a plurality of second CSI reports, a third field in each of the plurality of second CSI reports is used for carrying at least one CSI measured based on measurement information carried by one or at least two pieces of downlink control information, and a fourth field in each of the plurality of second CSI reports is used for carrying at least one CSI measured based on measurement information carried by one piece of downlink control information.

Optionally, step 230 specifically includes:

the terminal device sends a second CSI report, wherein a third field in the second CSI report is used for carrying a plurality of CSI obtained by measurement based on measurement information carried by one or a plurality of pieces of downlink control information, and a fourth field in the second CSI report is used for carrying a plurality of CSI obtained by measurement based on measurement information carried by one piece of downlink control information.

It should be understood that the specific process of the terminal device feeding back the CSI to the network device is similar to the specific process of the terminal device feeding back the CSI to the network device in the first implementation manner, and the specific process has been described in detail in the foregoing in combination with different situations, and is not described here again for brevity.

It should be noted that, in step 230, whether the terminal device sends one or more CSI reports (e.g., the first CSI report or the second CSI report), only one CSI report may be received for each network device. The CSI report received by the network device may carry one or more CSIs. The one or more CSIs may be CSIs measured based on measurement information carried by one piece of downlink control information, or may be CSIs measured based on measurement information carried by at least two pieces of downlink control information.

Optionally, the network device receives CSI, including:

the network equipment receives a first CSI report, the first CSI report comprises a first field and a second field, the first field comprises at least one CSI obtained through measurement based on measurement information carried in one or at least two pieces of downlink control information, and the second field indicates a measurement type based on the CSI in the first field.

Optionally, the network device receives CSI, including:

the network equipment receives a first CSI report, wherein the first CSI report comprises a first field, and the first field comprises at least one CSI obtained by measurement based on measurement information carried in at least two pieces of downlink control information or a predefined value; the predefined value implicitly indicates that the terminal device does not perform the CSI measurement based on the measurement information carried in the at least two pieces of downlink control information.

Optionally, the network device receives CSI, including:

Optionally, the second CSI report further includes a fifth field indicating a measurement type on which the CSI carried in the third field is based.

Optionally, after step 230, the method 200 further comprises:

in step 240, the network device determines the measurement type on which the received CSI is based.

Specifically, the network device may be the first network device listed above, and step 240 may include: step 2401, the first network device may determine a measurement type on which CSI #1 is based; alternatively, the network device may also be the second network device listed above, and step 240 may include: step 2402, the second network device may determine a measurement type on which CSI #2 is based; alternatively, the network device may also be a third network device listed above, and step 240 may include: at step 2403, the third network device may determine a measurement type on which CSI #3 is based.

It should be understood that the steps performed by the first network device, the second network device, and the third network device are shown in the figures for ease of understanding only, but this should not limit the present application in any way, and in an actual implementation process, the network device may perform only one of steps 2401 to 2403.

As can be appreciated from the above description, a terminal device may transmit CSI to one or more network devices. The measurement types on which the CSI received by the network device is based may include: and measuring CSI based on the measurement information carried by one piece of downlink control information, or measuring CSI based on the measurement information carried by a plurality of pieces of downlink control information.

As can be seen in step 230, after the terminal device receives the CSI from the terminal device in step 230, the network device may determine a measurement type based on the received CSI according to a predefined indication field (e.g., the second field in the first CSI report or the fifth field in the second CSI report) or a predefined rule (e.g., whether the information carried by the two fields in the first CSI report or the two fields in the second CSI report is the same).

It should be understood that how the terminal device indicates the measurement type based on the CSI has been described in detail above with reference to different implementations, and a method for the network device to determine the measurement type based on the CSI is similar to the method for the terminal device to indicate the measurement type based on the CSI, and therefore, for brevity, details are not repeated here.

It should also be understood that the method for indicating the measurement type of the CSI by the terminal device proposed in the present application is not limited to be used in the scenario provided in the present application, and when the terminal device does not perform CSI measurement based on the amount of downlink control information received within the preset time period, the measurement type based on which the fed back CSI is based may also be indicated to the network device based on a similar method.

Based on the technical scheme, the network equipment can accurately know the measurement type based on the CSI fed back by the terminal equipment, so that a reasonable transmission scheme and a scheduling strategy can be determined according to the CSI fed back by the terminal equipment and the measurement type, and the reliability of data transmission can be improved.

It should be understood that, in the embodiment of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiment of the present application.

It should also be understood that fig. 2 schematically shows steps performed by the terminal device and each network device for ease of understanding only, but this does not mean that the terminal device and the network device will perform each step shown in the figure, for example, the terminal device may perform only step 2201 or step 2202, or may perform step 2201 and step 2202. For another example, in step 230, the terminal device may transmit CSI to other network devices, and may not transmit CSI to the first to third network devices shown in the figure. Accordingly, fig. 2 is a schematic flow chart, and should not be construed as limiting the present application in any way.

It should be further understood that the serving network device referred to in this application may refer to the network device that provides services such as RRC connection, Non-access Stratum (NAS) mobility management, and security input for the terminal device through a wireless air interface protocol.

It should also be understood that reference to "storing" in this application may refer to storing in one or more memories. The one or more memories may be provided separately or integrated in the encoder or decoder, the processor, or the communication device. The one or more memories may also be provided separately, with a portion of the one or more memories being integrated into the decoder, the processor, or the communication device. The type of memory may be any form of storage medium and is not intended to be limiting of the present application.

It should also be understood that the "pre-agreement" described above may be implemented by pre-saving a corresponding code, table or other means that can be used to indicate the relevant information in the device (for example, including the terminal device and the network device), and the specific implementation manner of the present application is not limited thereto.

The communication method according to the embodiment of the present application is described in detail above with reference to fig. 2. The network device and the terminal device according to the embodiment of the present application are described in detail below with reference to fig. 3 to 6.

Fig. 3 is a schematic block diagram of a terminal device 30 provided in an embodiment of the present application. As shown in fig. 3, the terminal device 30 may include: a transceiver module 31 and a measurement module 32.

The transceiver module 31 is configured to receive downlink control information, where the downlink control information carries measurement information used for CSI measurement, and the measurement information at least includes indication information of CSI-RS resource configuration of a CSI-RS reference signal, and the indication information of the CSI-RS resource configuration is used to indicate a CSI-RS resource;

if the transceiver module 31 receives a downlink control message in a preset time period, the measurement module 32 is configured to perform CSI measurement only based on measurement information carried in the downlink control message; otherwise, the measurement module 32 is configured to perform each CSI measurement based on measurement information carried by at least two pieces of downlink control information received in the preset time period.

Optionally, the measurement module 32 is specifically configured to perform each CSI measurement based on measurement information carried by N pieces of downlink control information received within the preset time period, where CSI-RS resources indicated by downlink control information, except for the nth downlink control information, in the N pieces of downlink control information are interference measurement resources of CSI-RS resources indicated by the nth downlink control information, N is greater than or equal to N and is greater than or equal to 1, N is greater than or equal to 2, and N are integers.

Optionally, the measurement information further includes indication information of a codebook subset restriction CSR, where the indication information of the codebook subset restriction indicates a restricted codebook subset, and the codebook subset includes part or all of codewords in a codebook;

the measurement module 32 is specifically configured to perform the CSI measurement each time based on the codebook subsets indicated by the at least two downlink control information received in the preset time period.

Optionally, the transceiver module 31 is further configured to receive first indication information, where the first indication information indicates whether to perform CSI measurement based on measurement information carried in at least two pieces of downlink control information.

Optionally, if the transceiver module 31 receives the plurality of pieces of downlink control information in the preset time period, each piece of downlink control information in the plurality of pieces of downlink control information carries indication information configured by a CSI report; or

One downlink control information in the plurality of downlink control information carries indication information of a plurality of CSI report configurations; or alternatively

One downlink control information in the plurality of downlink control information carries indication information of one CSI report configuration.

Optionally, the transceiver module 31 is further configured to send CSI, where the CSI is measured based on measurement information carried by one or more pieces of downlink control information.

Optionally, the transceiver module 31 is specifically configured to:

transmitting a first CSI report, wherein the first CSI report comprises a first field and a second field, and the first field comprises: one CSI measured based on measurement information carried by one downlink control information, or a plurality of CSIs, each of the CSIs measured based on measurement information carried by at least two downlink control information, the second field indicates a measurement type on which the CSI in the first field is based; or

The method comprises the steps of sending a plurality of first CSI reports, wherein each first CSI report in the plurality of first CSI reports comprises a first field and a second field, the first field comprises a CSI measured based on measurement information carried by one or at least two pieces of downlink control information, and the second field indicates whether each CSI in the first field is measured based on the measurement information carried by at least two pieces of downlink control information.

Optionally, the transceiver module 31 is specifically configured to:

transmitting a first CSI report, wherein the first CSI report comprises a first field, and the first field comprises a plurality of CSI or predefined values; each CSI in the multiple CSIs is obtained by measuring based on measurement information carried by at least two pieces of downlink control information, and the predefined value implicitly indicates that the terminal equipment does not perform CSI measurement based on the measurement information carried by the at least two pieces of downlink control information; or

Sending a plurality of first CSI reports, wherein each first CSI report in the plurality of first CSI reports comprises a first field, and the first field comprises a CSI obtained by measurement based on measurement information carried by at least two pieces of downlink control information or a predefined value; the predefined value implicitly indicates that the terminal device does not perform CSI measurement based on measurement information carried by at least two pieces of downlink control information.

Optionally, the transceiver module 31 is specifically configured to:

sending a second CSI report, wherein the second CSI report comprises a third field and a fourth field, the third field is used for carrying a plurality of CSI obtained based on measurement information carried by one or at least two pieces of downlink control information, and the fourth field is only used for carrying CSI obtained based on measurement information carried by one piece of downlink control information; or

And sending a plurality of second CSI reports, wherein each second CSI report in the plurality of second CSI reports comprises a third field and a fourth field, the third field is used for carrying CSI measured based on measurement information carried by one or at least two pieces of downlink control information, and the fourth field is only used for carrying CSI measured based on measurement information carried by one piece of downlink control information.

Optionally, the measurement types include: and measuring CSI based on the measurement information carried by at least two pieces of downlink control information, or measuring CSI based on the measurement information carried by one piece of downlink control information.

Optionally, the measurement information is carried in a CSI request field.

It should be understood that the terminal device 30 may correspond to a network device in the method 200 for measuring channel state information according to the embodiment of the present invention, and the terminal device 30 may include modules of the method performed by the terminal device for performing the method 200 for measuring channel state information in fig. 2. Moreover, in order to implement the corresponding flow of the method 200 for measuring channel state information in fig. 2, the modules and the other operations and/or functions in the terminal device 30 are respectively, specifically, the transceiver module 31 is configured to execute step 210 (including step 2101 to step 2103) and step 230 in the method 200, the measurement module 32 is configured to execute step 220 (including one or both of step 2201 or step 2202) in the method 200, and the specific process of each module executing the corresponding step has already been described in detail in the method 200, and is not repeated herein for brevity.

Fig. 4 is a schematic block diagram of a network device 40 provided in an embodiment of the present application. As shown in fig. 4, the network device 40 may include: a transceiver module 41 and a determination module 42.

Wherein, the transceiver module 41 is configured to receive channel state information CSI;

the determining module 42 may be configured to determine whether the CSI received by the transceiver is measured based on measurement information carried in at least two pieces of downlink control information.

Optionally, the transceiver module 41 is specifically configured to receive a first CSI report, where the first CSI report includes a first field and a second field, the first field includes at least one CSI measured based on measurement information carried in one or at least two pieces of downlink control information, and the second field indicates whether each CSI in the first field is measured based on measurement information carried in at least two pieces of downlink control information.

Optionally, the transceiver module 41 is specifically configured to receive a first CSI report, where the first CSI report includes a first field, and the first field includes at least one CSI obtained by measurement based on measurement information carried in at least two pieces of downlink control information, or a predefined value; the predefined value implicitly indicates that the terminal device does not perform CSI measurement based on measurement information carried in the at least two pieces of downlink control information.

Optionally, the transceiver module 41 is specifically configured to receive a second CSI report, where the second CSI report includes a third field and a fourth field, the third field is used to carry at least one CSI measured based on measurement information carried by one or at least two pieces of downlink control information, and the fourth field is used to carry at least one CSI measured based on only one CSI-RS resource.

It should be understood that the network device 40 may correspond to a network device in the channel state information measuring method 200 according to an embodiment of the present invention, and the network device 40 may include modules of the method performed by a network device (e.g., a first network device, a second network device, or a third network device) for performing the channel state information measuring method 200 in fig. 2. Moreover, in order to implement the corresponding flow of the method 200 for measuring channel state information in fig. 2, specifically, the transceiver module 41 is configured to execute any one of steps 2101 to step 2103 and any one of steps 2301 to step 2303 in the method 200, and the determining module 42 is configured to execute any one of steps 2401 to step 2403 in the method 200, where specific processes of the modules for executing the corresponding steps are already described in detail in the method 200, and are not described again for brevity.

Fig. 5 is another schematic block diagram of a terminal device 500 according to an embodiment of the present application. As shown in fig. 5, the terminal device 500 includes a processor 501 and a transceiver 502, and optionally, the terminal device 500 further includes a memory 503. Wherein, the processor 502, the transceiver 502 and the memory 503 are communicated with each other via the internal connection path to transmit control and/or data signals, the memory 503 is used for storing a computer program, and the processor 501 is used for calling and running the computer program from the memory 503 to control the transceiver 502 to transmit and receive signals.

When the program instructions stored in the memory 503 are executed by the processor 501, the processor 501 is configured to control the transceiver 502 to receive downlink control information, and the processor 501 is further configured to perform CSI measurement based on only measurement information carried in one downlink control information if the transceiver 502 receives the one downlink control information; otherwise, the processor 501 is configured to perform each CSI measurement based on measurement information carried in at least two pieces of downlink control information received in the preset time period.

The processor 501 and the memory 503 may be combined into a processing device, and the processor 501 is configured to execute the program codes stored in the memory 503 to implement the functions. In particular, the memory 503 may be integrated into the processor 501 or may be independent of the processor 501. The terminal device 500 may further include an antenna 504, which is configured to send the uplink data or the uplink control signaling output by the transceiver 502 through a wireless signal.

Specifically, the terminal device 500 may correspond to the terminal device in the method 200 for measuring channel state information according to the embodiment of the present invention, and the terminal device 500 may include modules of the method performed by the terminal device for performing the method 200 for measuring channel state information in fig. 2. Moreover, in order to implement the corresponding flow of the method 200 for measuring channel state information in fig. 2, the memory 503 is specifically configured to store program codes, so that when the processor 501 executes the program codes, the transceiver 502 is controlled by the processor 501 to execute step 210 (including step 2101 to step 2103) and step 230 (including step 2301 to step 2303) in the method 200 through the antenna 504, and execute step 200 (including one or both of step 2201 or step 2202) in the method 200, and the specific process of executing the corresponding steps by each module is already described in detail in the method 200, and is not repeated herein for brevity.

The processor 501 may be configured to perform the actions implemented in the terminal described in the foregoing method embodiments, and the transceiver 502 may be configured to perform the actions of the terminal transmitting or sending to the network device described in the foregoing method embodiments. Please refer to the description of the previous embodiment of the method, which is not repeated herein.

The processor 501 and the memory 503 may be integrated into a processing device, and the processor 501 is configured to execute the program codes stored in the memory 503 to implement the functions. In particular, the memory 503 may be integrated into the processor 501.

The terminal apparatus 500 may further include a power supply 505 for supplying power to various devices or circuits in the terminal.

In addition, in order to further improve the functions of the terminal device, the terminal device 500 may further include one or more of an input unit 506, a display unit 507, an audio circuit 508, a camera 509, a sensor 510, and the like, and the audio circuit may further include a speaker 5082, a microphone 5084, and the like.

Fig. 6 is another schematic block diagram of a network device 600 provided in an embodiment of the present application. As shown in fig. 6, the network device 600 includes a processor 610 and a transceiver 620, and optionally, the network device 600 further includes a memory 630. Wherein, the processor 610, the transceiver 620 and the memory 630 communicate with each other via the internal connection path to transmit control and/or data signals, the memory 630 is used for storing a computer program, and the processor 610 is used for calling and running the computer program from the memory 630 to control the transceiver 620 to transmit and receive signals. When the program instructions stored in memory 630 are executed by processor 610, processor 610 is operable to control transceiver 620 to receive CSI; the processor 610 is further configured to determine whether the received CSI is measured based on measurement information carried in at least two pieces of downlink control information.

The processor 610 and the memory 630 may be combined into a single processing device, and the processor 610 is configured to execute the program codes stored in the memory 630 to implement the functions described above. In particular implementations, the memory 630 may be integrated with the processor 610 or may be separate from the processor 610.

The network device may further include an antenna 640, configured to send the downlink data or the downlink control signaling output by the transceiver 620 through a wireless signal.

In particular, the network device 600 may correspond to a network device (e.g. a first network device, a second network device or a third network device) in the method 200 for measuring channel state information according to an embodiment of the present invention, and the network device 600 may include units of the method performed by the network device for performing the method 200 for measuring channel state information in fig. 2. Also, in order to implement the corresponding flow of the method 200 for measuring channel state information in fig. 2, the memory 630 is specifically configured to store program codes, so that when the processor 610 executes the program codes, the transceiver 620 is controlled by the antenna 640 to execute any one of steps 2101 to 2103 and any one of steps 2301 to 2303 in the method 200, and execute any one of steps 2401 to 2403. The specific processes of each module for executing the corresponding steps are already described in detail in the method 300, and are not described herein again for brevity.

The present application also provides a communication system comprising one or more of the aforementioned network devices, and one or more of the terminal devices.

It should be understood that the processor in the embodiments of the present application may be a Central Processing Unit (CPU), and the processor may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. 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. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on 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, computer, server, or data center to another website, computer, server, or data center by wire (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can 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 collections 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" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character "/" herein is often abbreviated form "and/or".

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 technical 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 is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into 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 such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by 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 method for measuring Channel State Information (CSI) is characterized by comprising the following steps:

and receiving downlink control information in a preset time period, wherein the terminal equipment only carries out CSI measurement based on the measurement information carried in the downlink control information, otherwise, carrying out each CSI measurement based on N measurement information carried by N downlink control information in M downlink control information received in the preset time period, wherein M is more than or equal to N and is more than or equal to 2, and M and N are integers.

2. The method according to claim 1, wherein the terminal device performs each CSI measurement based on measurement information carried in N downlink control information of the M downlink control information received in the preset time period, and includes:

the terminal device performs each CSI measurement based on the measurement information carried in the N pieces of downlink control information received in the preset time period, the CSI-RS resource indicated by the downlink control information except the nth downlink control information in the N pieces of downlink control information is an interference measurement resource of the CSI-RS resource indicated by the nth downlink control information, N is more than or equal to N and more than or equal to 1, N is more than or equal to 2, and N and N are integers.

3. The method according to claim 1 or 2, wherein the measurement information further includes indication information of a codebook subset restriction CSR, the indication information of the CSR is used for indicating the restricted codebook subset, and the codebook subset includes part or all of codewords in a codebook; and

the terminal device performs each CSI measurement based on the measurement information carried in the N downlink control information received in the preset time period, including:

and the terminal equipment performs each CSI measurement based on the codebook subset indicated by the N downlink control information received in the preset time period.

4. The method according to any one of claims 1 to 3, further comprising:

and the terminal equipment receives first indication information, wherein the first indication information indicates whether CSI measurement is carried out based on the measurement information carried in the N pieces of downlink control information.

5. The method according to any one of claims 1 to 4, wherein if the terminal device receives a plurality of downlink control information within the preset time period, each downlink control information in the plurality of downlink control information carries indication information of one CSI report configuration; or

Only one piece of downlink control information in the plurality of pieces of downlink control information carries indication information of a plurality of CSI report configurations; or

6. The method according to any one of claims 1 to 5, further comprising:

and the terminal equipment sends CSI which is measured and obtained based on measurement information carried by one or the N pieces of downlink control information.

7. The method of claim 6, wherein the terminal device sends CSI comprising:

the terminal equipment sends a first CSI report, wherein the first CSI report comprises a first field and a second field, and the first field comprises: at least one CSI obtained through measurement based on measurement information carried in one piece of downlink control information, or at least one CSI obtained through measurement based on measurement information carried in the N pieces of downlink control information, wherein the second field indicates whether the CSI in the first field is obtained through measurement based on the measurement information carried in the N pieces of downlink control information or not; or

The terminal device sends a plurality of first CSI reports, each of the plurality of first CSI reports comprises a first field and a second field, the first field comprises a CSI measured based on measurement information carried in one or the N pieces of downlink control information, and the second field indicates whether each CSI in the first field is measured based on the measurement information carried in the N pieces of downlink control information.

8. The method of claim 6, wherein the terminal device sends CSI comprising:

the terminal equipment sends a first CSI report, wherein the first CSI report comprises a first field, and the first field comprises at least one CSI obtained by measurement based on measurement information carried in the N pieces of downlink control information or a predefined value; the predefined value implicitly indicates that the terminal equipment does not perform CSI measurement based on the measurement information carried in the N pieces of downlink control information; or

The terminal device sends a plurality of first CSI reports, wherein each first CSI report in the plurality of first CSI reports comprises a first field, and the first field comprises CSI obtained by measurement based on the measurement information carried by the N pieces of downlink control information or a predefined value; the predefined value implicitly indicates that the terminal device does not perform CSI measurement based on the measurement information carried in the N pieces of downlink control information.

9. The method of claim 6, wherein the terminal device sends CSI comprising:

the terminal device sends a second CSI report, wherein the second CSI report comprises a third field and a fourth field, the third field is used for carrying at least one CSI measured and obtained based on measurement information carried in one or the N pieces of downlink control information, and the fourth field is used for carrying at least one CSI measured and obtained based on measurement information carried in one piece of downlink control information; or

The terminal device sends a plurality of second CSI reports, each of the plurality of second CSI reports comprises a third field and a fourth field, the third field is used for carrying CSI measured based on measurement information carried in one or the N pieces of downlink control information, and the fourth field is only used for carrying CSI measured based on measurement information carried in one piece of downlink control information.

10. The method of claim 9, wherein the second CSI report further includes a fifth field, and wherein the fifth field indicates whether each CSI carried in the third field is measured based on measurement information carried in the N pieces of downlink control information.

11. A method for measuring Channel State Information (CSI) is characterized by comprising the following steps:

the network equipment receives Channel State Information (CSI);

the network equipment determines whether the received CSI is measured based on measurement information carried in N downlink control information in M downlink control information, wherein M is larger than or equal to N and larger than or equal to 2, and M and N are integers.

12. The method according to any of claims 1-11, wherein the measurement information is carried in a CSI request field.

13. A terminal device, comprising a transceiver and a processor, wherein,

the transceiver is used for receiving downlink control information, the downlink control information carries measurement information used for Channel State Information (CSI) measurement, the measurement information at least comprises indication information of CSI-RS resource configuration, and the indication information of the CSI-RS resource configuration is used for indicating CSI-RS resources;

the transceiver receives a downlink control message in a preset time period, and the processor is used for performing CSI measurement only based on the measurement information carried in the downlink control message; otherwise, the processor is used for performing each CSI measurement based on the measurement information carried in N downlink control information in the M downlink control information received in the preset time period, wherein M is larger than or equal to N and is larger than or equal to 2, and M and N are integers.

14. The terminal device according to claim 13, wherein the processor is specifically configured to perform each CSI measurement based on measurement information carried in N pieces of downlink control information received within the preset time period, where CSI-RS resources indicated by downlink control information other than the nth downlink control information in the N pieces of downlink control information are interference measurement resources of the CSI-RS resources indicated by the nth downlink control information, N is greater than or equal to N and greater than or equal to 1, N is greater than or equal to 2, and N are integers.

15. The terminal device according to claim 13 or 14, wherein the measurement information further includes indication information of codebook subset restriction CSR, the indication information of codebook subset restriction indicates restricted codebook subset, the codebook subset includes part or all of codewords in a codebook;

the processor is specifically configured to perform each CSI measurement based on the codebook subset indicated by the N pieces of downlink control information received in the preset time period.

16. The terminal device according to any one of claims 13 to 15, wherein the transceiver is further configured to receive first indication information indicating whether to perform CSI measurement based on measurement information carried in the N pieces of downlink control information.

17. The terminal device according to any one of claims 13 to 16, wherein if the transceiver receives multiple pieces of downlink control information within the preset time period, each piece of downlink control information in the multiple pieces of downlink control information carries indication information of a CSI report configuration; or alternatively

One downlink control information in the plurality of downlink control information carries indication information of a plurality of CSI report configurations; or

18. The terminal device according to any of claims 13 to 17, wherein the transceiver is further configured to send CSI, which is measured based on measurement information carried by one or the N pieces of downlink control information.

19. The terminal device according to claim 18, characterized in that the transceiver is specifically configured to,

sending a first CSI report, wherein the first CSI report comprises a first field and a second field, and the first field comprises: at least one CSI obtained by measurement based on measurement information carried by one piece of downlink control information, or at least one CSI obtained by measurement based on measurement information carried by the N pieces of downlink control information, wherein the second field indicates whether the CSI in the first field is obtained by measurement based on the measurement information carried by the N pieces of downlink control information; or

And sending a plurality of first CSI reports, wherein each first CSI report in the plurality of first CSI reports comprises a first field and a second field, the first field comprises a CSI measured based on measurement information carried by one or the N pieces of downlink control information, and the second field indicates whether each CSI in the first field is measured based on the measurement information carried by the N pieces of downlink control information.

20. The terminal device according to claim 18, characterized in that the transceiver is specifically configured to,

sending a first CSI report, wherein the first CSI report comprises a first field, and the first field comprises at least one CSI measured based on the N pieces of downlink control information or a predefined value; the predefined value implicitly indicates that the terminal equipment does not perform CSI measurement based on the measurement information carried by the N pieces of downlink control information; or

Sending a plurality of first CSI reports, wherein each first CSI report in the plurality of first CSI reports comprises a first field, and the first field comprises a CSI obtained based on measurement information carried by the N pieces of downlink control information or a predefined value; the predefined value implicitly indicates that the terminal device does not perform CSI measurement based on the measurement information carried by the N pieces of downlink control information.

21. The terminal device according to claim 18, characterized in that the transceiver is specifically configured to,

sending a second CSI report, wherein the second CSI report comprises a third field and a fourth field, the third field is used for carrying at least one CSI obtained by measurement based on measurement information carried by one or the N pieces of downlink control information, and the fourth field is used for carrying at least one CSI obtained by measurement based on measurement information carried by one piece of downlink control information; or

And sending a plurality of second CSI reports, wherein each second CSI report in the plurality of second CSI reports comprises a third field and a fourth field, the third field is used for carrying a CSI measured based on the measurement information carried by one or the N pieces of downlink control information, and the fourth field is only used for carrying a CSI measured based on the measurement information carried by one piece of downlink control information.

22. The terminal device of claim 21, wherein the second CSI report further includes a fifth field, and wherein the fifth field indicates whether each CSI carried in the third field is measured based on measurement information carried by the N pieces of downlink control information.

23. The terminal device according to any of claims 13 to 22, wherein the measurement information is carried in a CSI request field.

24. A network device, comprising:

a transceiver for receiving channel state information, CSI;

and the processor is used for determining whether the CSI received by the transceiver is measured based on the measurement information carried in N downlink control information of the M downlink control information, wherein M is more than or equal to N and is more than or equal to 2, and M and N are integers.

25. The network device of claim 24, wherein the measurement information is carried in a CSI request field.

26. A chip system, comprising:

a processor for calling and running a computer program from a memory so that a device on which the system-on-chip is installed performs the method of any one of claims 1 to 12.