CN117641438B

CN117641438B - Feedback method of channel state and related equipment

Info

Publication number: CN117641438B
Application number: CN202410112748.4A
Authority: CN
Inventors: 郑国增
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2024-01-26
Filing date: 2024-01-26
Publication date: 2024-07-02
Anticipated expiration: 2044-01-26
Also published as: CN117641438A

Abstract

The application provides a feedback method of channel state and related equipment, and relates to the technical field of communication. Wherein the method comprises the following steps: acquiring configuration information, wherein the configuration information is used for indicating a target Physical Downlink Shared Channel (PDSCH) and a demodulation reference signal (DMRS) associated with the target PDSCH; determining a first channel state information, CSI, report based on measurements of DMRS transmitted by a network device; and reporting the first CSI report through a target Physical Uplink Control Channel (PUCCH). The embodiment of the application carries out channel state feedback based on the DMRS, and the DMRS is usually transmitted together with the data channel and is used for demodulating the data channel, so that the state of the current channel can be reflected more efficiently and timely based on the DMRS, the base station can timely determine the state of the current channel, the scheduling strategy can be timely adjusted, and the quality of a communication network can be ensured.

Description

Feedback method of channel state and related equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a channel state feedback method and related devices.

Background

Channel state feedback is an important ring for guaranteeing the quality of a communication network, and fourth-generation mobile communication technology (4th Generation Mobile Communication Technology,4G) and fifth-generation mobile communication technology (5th Generation Mobile Communication Technology,5G) systems indicate quality attributes of channels of a communication link using channel state Information (CHANNEL STATE Information, CSI). The channel state information includes, for example, a channel quality indication (Channel Quality Indicator, CQI), a precoding matrix indication (Precoding Matrix Indicator, PMI), and a channel matrix Rank Indication (RI), etc.

In the prior art, channel State feedback is performed based on a Channel State Information reference signal (Channel-State-Information REFERENCE SIGNAL, CSI-RS), however, due to the fact that pilot frequency overhead of the CSI-RS is large, a transmission period of the CSI-RS is large, time delay of a base station for acquiring Channel State Information is large, channel State feedback based on the CSI-RS cannot actually reflect Channel quality of a data transmission Channel, and therefore scheduling strategies cannot be adjusted timely by the base station, and quality of a communication network cannot be guaranteed.

Disclosure of Invention

In order to solve the above problems, the present application provides a method for feeding back a channel state and related devices, which improve the timeliness of channel state feedback, so as to ensure the quality of a communication network.

In a first aspect, the present application provides a method for feeding back a channel state, where the method is applied to a terminal device, and the method includes: acquiring configuration information, wherein the configuration information is used for indicating a target physical downlink shared channel (Physical Downlink SHARED CHANNEL, PDSCH) and a Demodulation reference signal (Demodulation REFERENCE SIGNAL, DMRS) associated with a target Physical Downlink Shared Channel (PDSCH); determining a first channel state information, CSI, report based on measurements of DMRS transmitted by a network device; reporting the first CSI report through a target physical uplink control channel (Physical Uplink Control Channel, PUCCH).

The channel state feedback method provided by the embodiment of the application is different from the channel state feedback based on the CSI-RS in the prior art, but is based on the demodulation reference signal DMRS, and the problem of large time delay of acquiring the channel state information by the base station due to large pilot frequency overhead of the CSI-RS and large transmission period is solved. The embodiment of the application carries out channel state feedback based on the demodulation reference signal DMRS, and the DMRS is usually transmitted together with a data channel and is used for demodulating the data channel, so that the state of the current channel can be reflected more efficiently and timely, the base station can timely determine the state of the current channel, the scheduling strategy can be timely adjusted, and the quality of a communication network can be ensured.

In one possible implementation, the method may further include: and acquiring interference configuration information, wherein the interference configuration information is associated with scheduling configuration information of a target physical downlink shared channel PDSCH, and the interference configuration information is used for determining an interference measurement mode when the first CSI reports. For example, the interference configuration information may be DMRS code division multiplexing (Code Division Multiplexing, CDM) groups configured when scheduling the physical downlink shared channel PDSCH, and the terminal may measure interference on resources associated with the DMRS code division multiplexing CDM groups, which cannot multiplex data. For example: the network device configures the DMRS CDM group incapable of multiplexing data to be 2, and each DMRS CDM group includes 2 DMRS ports, and the DMRS incapable of multiplexing data is 4, but the number of DMRS ports configured by the base station for the current user for data transmission is 2, and then the terminal can measure interference information by using resources indicated by the remaining 2 DMRS ports.

In one possible implementation, the interference configuration information may also be pre-configured non-zero power channel state information reference signal NZP CSI-RS resources or channel state information interference measurement CSI-IM resources. The terminal may determine an interference measurement mode of the first CSI report according to interference configuration information indicated by the network device.

In one possible implementation, the first CSI report includes: rank Indicator (RI); wherein, the value of the rank indication RI is smaller than or equal to the transmission layer number of the target physical downlink shared channel. Since the rank indication RI is used to indicate the number of valid data layers of the target PDSCH, the value of the rank indication RI in the first CSI report is less than or equal to the number of transmission layers of the target PDSCH.

In one possible implementation, the configuration information is further used to indicate a target DMRS port, which is used to obtain the first CSI report. The network device may indicate a target DMRS port for acquiring the first CSI report through the configuration information.

In one possible implementation, each of the target DMRS ports belongs to a different DMRS code division multiplexing CDM group. Since DMRSs of different DMRS code division multiplexing CDM groups are staggered in the frequency domain, the accuracy of channel state information estimation can be improved.

In one possible implementation, the first CSI report includes: channel quality indicators (Channel Quality Indicator, CQI), CQI including wideband CQI and/or subband CQI.

For example, when the sub-band CQI is reported in the first CSI report, the size of the sub-band CQI and the number of sub-band CQIs are related to the frequency domain range of the PDSCH. For example: the division of the precoding resource block group (Precoding Resource block Group, PRG) associated with the PDSCH. For example, the terminal assumes that when the base station transmits PDSCH, the precoding used for transmitting PDSCH is the same in Resource Block (RB) within the same precoding Resource Block group.

For example, when the first CQI includes a sub-band CQI, the CQI may include N sub-band CQIs; where N is equal to the number of PRGs associated with the target physical downlink shared channel. The CQI includes the number of sub-band CQIs that of PRGs with which the PDSCH is associated, and the size of the sub-band CQIs is the number of physical resource blocks (Physical Resource Block, PRBs) that one PRG includes.

In one possible implementation, when the frequency domain range of the PDSCH is a discontinuous physical resource (e.g., resource block RB), then the first CSI report only allows wideband CQI to be reported.

In one possible implementation, the configuration information includes: reporting a trigger field; the reporting trigger field is used for indicating to report the first CSI report, and belongs to downlink control information DCI.

Specifically, the network device may configure a specific reporting trigger field in downlink control information (Downlink Control Information, DCI) for scheduling PDSCH, where the reporting trigger field may trigger the terminal to report CSI reports.

In one possible implementation, the configuration information is further used to indicate a channel type of the target physical uplink control channel; the channel types include a channel type for carrying the first CSI report.

Specifically, the base station may configure channel types of multiple physical uplink control channels PUCCH, where the channel types of the PUCCH may include: the HARQ transmission method comprises the steps of carrying a channel type of a first CSI report, carrying a HARQ corresponding to a PDSCH and carrying the HARQ corresponding to the first CSI report and the PDSCH.

The base station may configure a channel type of a PUCCH, the PUCCH may be configured to be used only for transmitting HARQ corresponding to PDSCH, the PUCCH may be configured to be used only for transmitting CSI reports acquired based on DMRS associated with PDSCH, and the PUCCH may be configured to be used both for transmitting HARQ corresponding to PDSCH and CSI reports acquired based on DMRS associated with PDSCH.

In one possible implementation, when the channel type of the physical uplink control channel PUCCH is a channel type for carrying the hybrid automatic repeat request HARQ corresponding to the first CSI report and the PDSCH, the transmission priority of the PUCCH transmission HARQ is higher than the transmission priority of the first CSI report.

Specifically, when the PUCCH may be used to transmit the HARQ request and the first CSI report, the HARQ request may have a higher transmission priority on the PUCCH than the first CSI report.

In one possible implementation, when the physical uplink control channel, PUCCH, is also used to transmit the second CSI report, the PUCCH transmits the first CSI report with a higher transmission priority than the second CSI report, wherein the second CSI report is determined based on measurements of the channel state information reference signal, CSI-RS.

Specifically, when the PUCCH may be used to transmit the first CSI report acquired based on the DMRS associated with the PDSCH and other types of CSI reports, the first CSI report acquired based on the DMRS associated with the PDSCH may be transmitted with higher priority than the other types of CSI reports, which may include channel state reports as a conventional CSI-RS measurement based on the channel state information reference signal.

In one possible implementation, the method further includes determining a CSI reporting offset. Specifically, determining a reporting offset of a third CSI report, where the third CSI report is sent through a first physical uplink control channel, and the first physical uplink control channel is used to transmit the third CSI report and is not used to transmit a hybrid automatic repeat request HARQ corresponding to the first physical downlink shared channel; determining a reporting offset of a fourth CSI report, wherein the fourth CSI report is sent through a second physical uplink control channel, and the second physical uplink control channel is used for transmitting the fourth CSI report and a hybrid automatic repeat request (HARQ) corresponding to a second physical downlink shared channel; and the reporting offset of the third CSI report is smaller than the reporting offset of the fourth CSI report.

The offset of CSI report reporting refers to a time interval from a time when the terminal receives the PDSCH to a time when the terminal transmits the PUCCH carrying the corresponding CSI report, and when the PUCCH is configured to transmit only the first CSI report, the offset of CSI report reporting corresponding to the PUCCH is smaller than the HARQ corresponding to the PUCCH configured to transmit the fourth CSI report and the second physical downlink shared channel. The offset reported by the CSI report is related to the channel type of the PUCCH configured by the downlink control information DCI.

A second aspect of the present application provides a method of channel state feedback, the method being applied to a network device, the method comprising: generating configuration information, wherein the configuration information is used for indicating a target physical downlink shared channel and a demodulation reference signal (DMRS) associated with the target physical downlink shared channel; transmitting the configuration information and transmitting the DMRS so that the target terminal determines a first Channel State Information (CSI) report based on measurement of the DMRS; and receiving a first CSI report reported by the target terminal through the target physical uplink control channel.

The channel state feedback method provided by the embodiment of the application is different from the channel state feedback based on the CSI-RS in the prior art, but is based on the demodulation reference signal DMRS, and the problem of large time delay of acquiring the channel state information by the base station due to large pilot frequency overhead of the CSI-RS and large transmission period is solved. The network equipment generates the configuration information and sends the configuration information to the terminal equipment, so that the terminal equipment measures and determines the first CSI report based on the DMRS indicated by the configuration information, and the terminal carries out channel state feedback based on the demodulation reference signal (DMRS), wherein the DMRS is usually sent together with a data channel and is used for demodulating the data channel, so that the state of the current channel can be reflected more efficiently and timely, the network equipment can timely determine the state of the current channel, the scheduling strategy can be timely adjusted, and the quality of a communication network is ensured.

In one possible implementation, the method further includes: and sending interference configuration information, wherein the interference configuration information is associated with scheduling configuration information of a target physical downlink shared channel, and the interference configuration information is used for determining an interference measurement mode when the first CSI reports. For example, the interference configuration information may be DMRS code division multiplexing CDM groups configured when scheduling the physical downlink shared channel PDSCH, which cannot multiplex data, and the terminal may measure interference on resources associated with the DMRS code division multiplexing CDM groups, which cannot multiplex data. For example: the network device configures the DMRS CDM group incapable of multiplexing data to be 2, and each DMRS CDM group includes 2 DMRS ports, and the DMRS incapable of multiplexing data is 4, but the number of DMRS ports configured by the base station for the current user for data transmission is 2, and then the terminal can measure interference information by using resources indicated by the remaining 2 DMRS ports.

In one possible implementation, the first CSI report includes: rank indication, RI; wherein, the value of the rank indication RI is smaller than or equal to the number of transmission layers of the target physical downlink shared channel. Since the rank indication RI is used to indicate the number of valid data layers of the target PDSCH, the value of the rank indication RI in the first CSI report is less than or equal to the number of transmission layers of the target PDSCH.

In one possible implementation, the first CSI report includes: channel quality index, CQI, including wideband CQI and/or subband CQI.

For example, when the sub-band CQI is reported in the first CSI report, the size of the sub-band CQI and the number of sub-band CQIs are related to the frequency domain range of the PDSCH. For example: the division method of the precoding resource block group PRG associated with the PDSCH is related.

In one possible implementation, when the subband CQI is reported in the first CSI report, the CQI may include N subband CQIs; where N is equal to the number of pre-coded resource block groups PRGs associated with the target physical downlink shared channel. The CQI includes the number of sub-band CQIs that of PRGs with which the PDSCH is associated, and the size of the sub-band CQIs is the number of physical resource blocks (Physical Resource Block, PRBs) that one PRG includes.

A third aspect of the present application provides a terminal device comprising:

an information acquisition unit, configured to acquire configuration information, where the configuration information is used to indicate a target physical downlink shared channel and a demodulation reference signal DMRS associated with the target physical downlink shared channel;

a signal measurement unit for determining a first channel state information CSI report based on measurements of a demodulation reference signal transmitted by a network device;

and the report sending unit is used for reporting the first CSI report through the target physical uplink control channel.

A fourth aspect of the present application provides a network device comprising:

An information generating unit, configured to generate configuration information, where the configuration information is used to indicate a target physical downlink shared channel and a demodulation reference signal DMRS associated with the target physical downlink shared channel;

an information transmitting unit configured to transmit configuration information and transmit DMRS such that the target terminal determines a first channel state information CSI report based on measurement of the DMRS;

And the report receiving unit is used for receiving a first CSI report reported by the target terminal through the target physical uplink control channel.

A fifth aspect of the present application provides a communications device comprising a processor, the processor being connected to a memory for storing a computer program, the processor being for executing the computer program stored in the memory to cause the communications device to implement a method according to any one of the implementations of the first aspect of the present application.

A sixth aspect of the present application provides a communications device comprising a processor, the processor being connected to a memory for storing a computer program, the processor being for executing the computer program stored in the memory to cause the communications device to implement a method according to any one of the implementations of the second aspect of the present application.

A seventh aspect of the application provides a computer readable storage medium storing a computer program or instructions which, when executed by a processor, implement a method as in any one of the implementations of the first or second aspects of the application.

Drawings

Fig. 1 is a schematic diagram of a system architecture of a communication system according to an embodiment of the present application;

fig. 2 is a flow chart of a feedback method of channel status according to an embodiment of the present application;

fig. 3 is a flowchart of another feedback method of channel status according to an embodiment of the present application;

fig. 4 is a schematic diagram of a determining manner of a CSI report reporting offset according to an embodiment of the present application;

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

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

fig. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of another communication device according to an embodiment of the present application;

Fig. 9 is a schematic structural diagram of a computer program product according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary. It should also be understood that in embodiments of the present application, "one or more" means one, two, or more than two; "and/or", describes an association relationship of the association object, indicating that three relationships may exist; for example, a and/or B may represent: a alone, a and B together, and B alone, wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

The plurality of the embodiments of the present application is greater than or equal to two. It should be noted that, in the description of the embodiments of the present application, the terms "first," "second," and the like are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance, or alternatively, for indicating or implying a sequential order.

The embodiment of the application is applied to a communication system, which can be a second generation (2G) communication system and a third generation (3G) communication system, can be an LTE system, can be a fifth generation (5G) communication system, can be a mixed structure of LTE and 5G, can be a 5G new wireless (5G New Radio,5G NR) system, and can be a new communication system in future communication development.

The communication system includes a first device and a second device. The first device may be a device on the network side for providing network communication functions, in some cases also referred to as a network device, a network element, which may typically be a base station (including a functional unit of a base station, or a combination of functional units of a base station) or a core network unit, wherein the core network unit may be a functional unit in the core network, including but not limited to an access and mobility management function (ACCESS AND Mobility Management Function, AMF) unit or a session management function (Session Management Function, SMF) unit. The second device may be a device accessing the network, typically a terminal. An example of a communication system is shown in fig. 1, which fig. 1 comprises a base station 1 and a terminal 2.

In the embodiment provided by the application, the base station may be any device with a wireless transceiving function, including but not limited to: an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in long term evolution (long term evolution, LTE), a base station (gNodeB or gNB) or transceiver point (transmission receiving point/transmission reception point, TRP) in New Radio (NR), a base station for 3GPP subsequent evolution, an access node in Wi-Fi system, a wireless relay node, a wireless backhaul node, etc. The base station may be: macro base station, micro base station, pico base station, small station, relay station, balloon station, or the like. A base station may include one or more co-sited or non-co-sited transmission points (Transmission Reception Point, TRP). The base station may also be a radio controller, a centralized unit (centralized unit, CU), and/or a Distributed Unit (DU) in the cloud radio access network (cloud radio access network, CRAN) scenario. The base station may communicate with the terminal or may communicate with the terminal through a relay station. The terminal may communicate with a plurality of base stations of different technologies, for example, the terminal may communicate with a base station supporting an LTE network, may communicate with a base station supporting a 5G network, and may perform dual connectivity with the base station supporting the LTE network and the base station supporting the 5G network.

In the embodiments provided by the present application, the terminal may be in various forms, such as a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a vehicle-mounted terminal device, a wireless terminal in unmanned (SELF DRIVING), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (SMART GRID), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (SMART CITY), a wireless terminal in smart home (smart home), a wearable terminal device, and the like. A terminal may also be referred to as a terminal device, user Equipment (UE), access terminal device, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, remote terminal device, mobile device, UE terminal device, wireless communication device, UE agent, UE apparatus, or the like. The terminal may also be a fixed terminal or a mobile terminal.

In order to make the technical scheme of the present application clearer and easier to understand, the feedback method of the channel state in the embodiment of the present application is described below with reference to the accompanying drawings.

Referring to a flowchart of a channel state feedback method shown in fig. 2, in the flowchart shown in fig. 2, a network device is taken as a base station for illustration, and the method includes:

Step S100: the base station generates configuration information.

Specifically, the base station generates configuration information for indicating the target physical downlink shared channel PDSCH and the demodulation reference signal DMRS associated with the target physical downlink shared channel PDSCH.

The configuration information may specifically be that the base station informs the terminal through wireless signaling, for example, signaling of a radio resource control (Radio Resource Control, RRC) layer and/or downlink control information (Downlink Control Information, DCI) carried in a physical downlink control channel (Physical Downlink Control Channel, PDCCH), and the generation of the configuration information is implemented through wireless signaling and/or downlink control information DCI.

Step S200: and the base station sends configuration information to the terminal.

Specifically, the configuration information is used for indicating the target physical downlink shared channel PDSCH and the demodulation reference signal DMRS associated with the target physical downlink shared channel PDSCH, and the base station sends the configuration information to the terminal, so that the terminal receives the configuration information, and can implement measurement on the DMRS based on the content indicated by the configuration information.

Step S300: the base station transmits DMRS associated with the target PDSCH indicated by the configuration information to the terminal.

It should be noted that, in the embodiment of the present application, the execution sequence of step S200 and step S300 is not limited, and the base station may first send the configuration information to the terminal, or may send the configuration information and the DMRS associated with the target PDSCH indicated by the configuration information to the terminal together.

Step S400: the terminal determines a first channel state information, CSI, report based on the measurement of the DMRS.

Specifically, after receiving the DMRS sent by the base station, the terminal determines, based on the configuration information, that the reference signal used for channel measurement is the DMRS associated with the target PDSCH, and determines the first CSI report based on measuring the DMRS.

Step S500: and the terminal reports the first CSI report based on the target physical uplink control channel PUCCH.

Specifically, the terminal reports the first CSI report through the target physical uplink control channel PUCCH. Therefore, the channel state feedback method provided by the embodiment of the application is different from the channel state feedback based on the CSI-RS in the prior art, but the channel state feedback is performed based on the demodulation reference signal DMRS, and the problem of large time delay of the base station for acquiring the channel state information due to large pilot frequency expenditure of the CSI-RS and large transmission period is solved.

The pilot signal refers to a signal transmitted for measurement or monitoring purposes in the communication network, such as CSI-RS, and the pilot overhead refers to a resource consumed when transmitting the pilot signal.

Moreover, it can be understood that, in the embodiment of the present application, the first CSI report is determined based on the measurement of the DMRS, and the DMRS is usually transmitted in a bonded manner with the PDSCH of the physical downlink shared channel, and the PDSCH is scheduled by the downlink control information DCI, which belongs to the aperiodic transmission. Therefore, the first CSI report determined based on the measurement of the DMRS in the embodiment of the present application also adopts an aperiodic reporting mode, where the aperiodic reporting mode may be triggered by downlink control information DCI, the reporting delay is low, and the feedback efficiency of the channel state is better.

In a possible implementation manner, before step S400, the method for feeding back a channel state provided by the embodiment of the present application further includes: the terminal acquires interference configuration information, wherein the interference configuration information is associated with scheduling configuration information of a target physical downlink shared channel PDSCH, and the interference configuration information is used for determining an interference measurement mode when the first CSI reports.

Specifically, the terminal may determine, according to the interference configuration information, an interference measurement manner of the first CSI report.

For example, the interference configuration information may be DMRS code division multiplexing CDM groups configured when scheduling the physical downlink shared channel PDSCH, which cannot multiplex data, and the terminal may measure interference on resources associated with the DMRS code division multiplexing CDM groups, which cannot multiplex data. For example: the network device configures the DMRS CDM group incapable of multiplexing data to be 2, and each DMRS CDM group includes 2 DMRS ports, and the DMRS incapable of multiplexing data is 4, but the number of DMRS ports configured by the base station for the current user for data transmission is 2, and then the terminal can measure interference information by using resources indicated by the remaining 2 DMRS ports.

The interference configuration information may be, for example, pre-configured non-zero power channel state information reference signal NZP CSI-RS resources or channel state information interference measurement CSI-IM resources. The terminal may determine an interference measurement mode of the first CSI report according to interference configuration information indicated by the base station.

In one possible implementation, the first CSI report may include a channel quality Indicator (Channel Quality Indicator, CQI) and/or a Rank Indicator (RI).

When the first CSI report includes a rank indication RI, the RI value should be less than or equal to the number of transmission layers of the target physical downlink shared channel PDSCH. Since the rank indication RI is used to indicate the number of valid data layers of the target PDSCH, the value of the rank indication RI in the first CSI report is less than or equal to the number of transmission layers of the target PDSCH.

Wherein, when the first CSI report includes a channel quality indicator CQI, the CQI may include a wideband CQI and/or a subband CQI.

Specifically, when the frequency domain range of the PDSCH is a discontinuous physical resource (e.g., a resource block RB), the first CSI report only allows wideband CQI to be reported. When the frequency domain range of the PDSCH is a contiguous physical resource, the base station may configure the terminal to report wideband CQI and/or subband CQI. It will be appreciated that wideband CQI and sub-band CQI reflect different concentrations of CQI reporting, and may include sub-bands separated under the channel bandwidth of one carrier, and that a wideband channel may include a plurality of sub-bands, and that channel quality indicator CQI information for each sub-band is referred to as sub-band CQI. The wideband CQI is uniformly measured in the sub-band (PRB group) to be measured and a CQI value is reported.

Further, when the sub-band CQI needs to be reported in the first CSI report, the size of the sub-band CQI and the number of the sub-band CQIs are related to the frequency domain range of the PDSCH. For example: the division of the precoding resource block group (Precoding Resource block Group, PRG) associated with the PDSCH.

For example, when the first CQI includes a sub-band CQI, the CQI may include N sub-band CQIs; where N is equal to the number of PRGs associated with the target physical downlink shared channel PDSCH. Namely: the first CQI includes a number of sub-band CQIs that of PRGs with which the PDSCH is associated, and the size of the sub-band CQIs is that of the number of physical resource blocks (Physical Resource Block, PRBs) that one PRG includes.

For example, if the partition manner of the precoding resource block group PRG associated with the PDSCH is wideband (wideband), the first CSI report does not need to report the sub-band CQI.

In one possible implementation, the configuration information generated by the base station is further used to indicate a target DMRS port, which is used to obtain the first CSI report.

Specifically, the base station may instruct a specific DMRS port through the configuration information, and acquire the first CSI report based on the specific DMRS port.

For example, when the terminal needs to feed back a specific rank indication RI value, the base station may configure a DMRS port number for acquiring the first CSI report. For example: and the terminal feeds back a rank indication RI value of 2 in the first CSI report, and the number of DMRS ports associated with the target PDSCH is 4, so that the base station can instruct the terminal to acquire the first CSI report through the 2 nd DMRS port and the 3 rd DMRS port through configuration information.

For example, when the terminal needs to feed back a specific rank indication RI value, the base station may determine, by default, the DMRS port number for obtaining the first CSI report. For example: the terminal feeds back a rank indication RI value of 2 in the first CSI report, the number of DMRS ports associated with a target PDSCH is 4, and the terminal defaults to acquire the first CSI report through the 1 st DMRS port and the 2 nd DMRS port. The terminal feeds back a rank indication RI value of 3 in the first CSI report, the number of DMRS ports associated with a target PDSCH is 4, and the terminal defaults to acquire the first CSI report through the 1 st DMRS port, the 2 nd DMRS port and the 3 rd DMRS port.

Further, in the case that the target DMRS ports indicated by the configuration information are greater than or equal to 2, each target DMRS port should belong to a different DMRS code division multiplexing CDM group. Since DMRSs of different DMRS code division multiplexing CDM groups are staggered in the frequency domain, the accuracy of channel state information estimation can be improved.

In one possible implementation, the configuration information generated by the base station further includes a reporting trigger field; the reporting trigger field is used for triggering the terminal to report the CSI report, and the downlink control information DCI comprises the reporting trigger field.

It can be understood that the base station can configure a specific field in the downlink control information DCI, and instruct the terminal to report the CSI report through the configured report trigger field, so as to complete feedback of the channel state.

Referring to the flowchart of another feedback method of channel status shown in fig. 3, a base station sends downlink control information DCI to a terminal based on a physical downlink control channel PDCCH, where the DCI can indicate a demodulation reference signal DMRS associated with a physical downlink shared channel PDSCH and send the DMRS to the terminal, so that the terminal determines a CSI report based on measurement of the DMRS and reports the CSI report obtained by measurement based on a physical uplink control channel PUCCH.

It should be noted that, the present application does not limit the position information and the specific field value of the specific field of the reporting trigger field in the downlink control information DCI, and those skilled in the art may set the reporting trigger field based on an actual scheme.

In addition to indicating, by a specific field in the downlink control information DCI, the terminal to report the CSI report, in another possible implementation manner, the terminal may determine whether to report the CSI report based on a physical uplink control channel PUCCH resource type indicated in the downlink control information DCI issued by the base station.

Specifically, the downlink control information DCI issued by the base station also indicates what kind of physical uplink control channel PUCCH should be used by the terminal to report the resource, and the terminal may further determine whether to report the CSI report according to the specific PUCCH resource type or sequence number.

For example, the base station configures a plurality of PUCCH resources in RRC, wherein the first physical uplink control channel PUCCH resource is used to carry CSI reports. The subsequent base station indicates a first physical uplink control channel PUCCH through downlink control information DCI, where the type corresponding to the first PUCCH is used to carry CSI reports, so that when the terminal receives the first PUCCH indicated by the DCI, the terminal performs uploading processing of the CSI reports.

In one possible implementation, the configuration information generated by the base station may also be used to indicate the channel type of the target physical uplink control channel PUCCH.

In practical applications, the PUCCH may be configured by the base station as follows:

The first type of PUCCH is used for bearing the channel type of the first CSI report;

The second type of PUCCH is used for carrying a hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) corresponding to the PDSCH;

thirdly, the PUCCH is used for bearing the channel type of the HARQ corresponding to the first CSI report and the PDSCH;

The base station may configure PUCCHs of different channel types, and for a third PUCCH channel type, the PUCCHs may be used for transmitting the hybrid automatic repeat request HARQ and may also be used for transmitting the first CSI report, where the transmission priority of the PUCCH transmission HARQ is higher than the transmission priority of the first CSI report.

It is understood that the PUCCH should have a higher transmission priority than the first CSI report when used to transmit HARQ as well as CSI reports.

Further, for both the PUCCH of the first channel type and the PUCCH of the third channel type, CSI reports can be transmitted, which in one possible implementation may also be configured to transmit a second CSI report, which refers to other types of CSI than the first CSI report, and illustratively, the second CSI report is determined by the terminal based on measurements of the channel state information reference signal CSI-RS.

In this case, the PUCCH transmits the first CSI report with higher priority than the second CSI report. Because the first CSI report is determined based on the measurement of the DMRS, the timeliness of the first CSI report in channel state feedback is higher than the reporting timeliness of other types of CSI reports, and the PUCCH should transmit the first CSI report preferentially, so as to ensure that the base station efficiently and timely acquires the required current channel state, so that the base station can adjust the scheduling policy timely, and ensure the quality of the communication network.

In a possible implementation manner, the method for feeding back the channel state provided by the embodiment of the application further comprises determining the reporting offset of the CSI report.

Determining a reporting offset of a third CSI report, wherein the third CSI report is sent through a first physical uplink control channel, and the first physical uplink control channel is used for transmitting the third CSI report and is not used for transmitting a hybrid automatic repeat request (HARQ) corresponding to a first physical downlink shared channel; determining a reporting offset of a fourth CSI report, wherein the fourth CSI report is sent through a second physical uplink control channel, and the second physical uplink control channel is used for transmitting the fourth CSI report and a hybrid automatic repeat request (HARQ) corresponding to a second physical downlink shared channel; and the reporting offset of the third CSI report is smaller than the reporting offset of the fourth CSI report.

Specifically, for the first PUCCH channel type that is only used to carry the first CSI report and the third PUCCH channel type that is used to carry both the first CSI report and the hybrid automatic repeat request HARQ, the offset amounts of the CSI report reporting are different, and it is understood that the offset amounts of the CSI report reporting refer to the time interval from the time when the terminal receives the PDSCH to the time when the terminal sends the PUCCH that carries the corresponding CSI report, and when the PUCCH is configured to be used only to transmit the first CSI report, the CSI report reporting offset amount corresponding to the PUCCH is smaller than the HARQ that the PUCCH is configured to be used to transmit the fourth CSI report and corresponds to the second downlink shared channel. Thus, the offset reported by the CSI report is related to the channel type of the PUCCH configured by the downlink control information DCI.

In the following, a schematic diagram of a determining a CSI report reporting offset is shown in connection with fig. 4, where the first PUCCH is configured to transmit a third CSI report and is not used to transmit HARQ corresponding to the first PDSCH, and the second PUCCH is configured to transmit fourth CSI and HARQ corresponding to the second PDSCH. At the time T1, the first terminal receives a first PDSCH, and the second terminal receives a second PDSCH; at a time T2, the first terminal reports a third CSI report on the first PUCCH; at the time T3, the second terminal reports the fourth CSI report on the second PUCCH.

Then, the reporting offset of the third CSI report is Δt1=t2-T1, and the reporting offset of the fourth CSI report is Δt2=t3-T1, where Δt1 is smaller than Δt2.

Referring to a schematic structural diagram of a terminal device shown in fig. 5, the terminal device includes:

An information obtaining unit 501, configured to obtain configuration information, where the configuration information is used to indicate a target physical downlink shared channel and a demodulation reference signal DMRS associated with the target physical downlink shared channel;

A signal measurement unit 502, configured to determine a first channel state information CSI report based on a measurement of a DMRS transmitted by a network device;

Report sending unit 503 is configured to report the first CSI report through the target physical uplink control channel.

Specifically, the embodiment of the application provides a terminal device, which determines a first Channel State Information (CSI) report based on measurement of a demodulation reference signal (DMRS) indicated by a network device and realizes feedback of a channel state. The embodiment of the application carries out channel state feedback based on the demodulation reference signal DMRS, and the DMRS is usually transmitted together with a data channel and is used for demodulating the data channel, so that the state of the current channel can be reflected more efficiently and timely, the base station can timely determine the state of the current channel, the scheduling strategy can be timely adjusted, and the quality of a communication network can be ensured.

In a possible implementation manner, the information obtaining unit 501 is further configured to obtain interference configuration information, where the interference configuration information is associated with scheduling configuration information of the target physical downlink shared channel, and the interference configuration information is used to determine an interference measurement manner when the first CSI report is determined.

In one possible implementation, the first CSI report includes: rank indication, RI; wherein, the value of the rank indication RI is smaller than or equal to the number of transmission layers of the target physical downlink shared channel.

In one possible implementation, the configuration information is further used to indicate a target DMRS port, where the target DMRS port is used to obtain the first CSI report.

In one possible implementation, each of the target DMRS ports belongs to a different DMRS code division multiplexing CDM group.

In one possible implementation, the first CSI report includes: channel quality index, CQI, comprising wideband CQI and/or subband CQI.

In one possible implementation, the CQI includes: n sub-band CQIs; wherein N is equal to the number of pre-coded resource block groups PRGs associated with the target physical downlink shared channel.

In one possible implementation, the CQI includes: wideband CQI; the frequency domain resource corresponding to the target physical downlink shared channel is a discontinuous physical resource.

In one possible implementation, the configuration information includes: reporting a trigger field; the reporting trigger field is used for indicating to report the first CSI report, and the reporting trigger field belongs to downlink control information DCI.

In a possible implementation manner, the configuration information is further used to indicate a channel type of the target physical uplink control channel;

the channel type includes a channel type for carrying the first CSI report.

In a possible implementation manner, the report sending unit 503 is further configured to transmit, through the target physical uplink control channel, a hybrid automatic repeat request HARQ corresponding to the target physical downlink shared channel; wherein, the transmission priority of the HARQ is higher than the transmission priority of the first CSI report.

In a possible implementation manner, the report sending unit 503 is further configured to transmit a second CSI report through the target physical uplink control channel, where the second CSI report includes a CSI report determined based on a measurement of a channel state information reference signal CSI-RS; the transmission priority of the first CSI report is higher than the transmission priority of the second CSI report.

In a possible implementation manner, the terminal device further includes a reporting offset determining module, where the reporting offset determining module is configured to determine a reporting offset of a third CSI report, where the third CSI report is sent through a first physical uplink control channel, and the first physical uplink control channel is used to transmit the third CSI report and is not used to transmit a hybrid automatic repeat request HARQ corresponding to the first physical downlink shared channel; determining a reporting offset of a fourth CSI report, wherein the fourth CSI report is sent through a second physical uplink control channel, and the second physical uplink control channel is used for transmitting the fourth CSI report and a hybrid automatic repeat request (HARQ) corresponding to a second physical downlink shared channel; and the reporting offset of the third CSI report is smaller than the reporting offset of the fourth CSI report.

It should be noted that, the steps and relevant technical features executed by each unit in the terminal device provided by the embodiment of the present application correspond to the feedback method of the channel state provided by the application of the foregoing embodiment, and the description of the device portion may refer to the embodiment of the foregoing method portion, which is not repeated herein.

Referring to fig. 6, a schematic diagram of a network device includes:

an information generating unit 601, configured to generate configuration information, where the configuration information is used to indicate a target physical downlink shared channel and a demodulation reference signal DMRS associated with the target physical downlink shared channel;

An information transmitting unit 602, configured to transmit configuration information and transmit DMRS, so that the target terminal determines a first channel state information CSI report based on measurement of the DMRS;

a report receiving unit 603, configured to receive a first CSI report reported by the target terminal through the target physical uplink control channel.

Specifically, the embodiment of the application provides a network device, wherein the network device generates configuration information, so that a terminal device can determine a first Channel State Information (CSI) report and realize feedback of a channel state based on measurement of a demodulation reference signal (DMRS) indicated by the network device. The embodiment of the application carries out channel state feedback based on the demodulation reference signal DMRS, and the DMRS is usually transmitted together with a data channel and is used for demodulating the data channel, so that the state of the current channel can be reflected more efficiently and timely, the base station can timely determine the state of the current channel, the scheduling strategy can be timely adjusted, and the quality of a communication network can be ensured.

It should be noted that, the steps and relevant technical features executed by each unit in a network device provided by the embodiments of the present application correspond to the feedback method of the channel state provided by the previous embodiments, and the description of the device portion may refer to the embodiments of the previous method portion, which is not repeated herein.

The embodiment of the application also provides a communication device, which can be specifically a network device or a terminal device in the foregoing embodiment, where the communication device includes a processor, and the processor is connected to a memory, where the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the communication device implements any one of the channel state feedback methods provided in the foregoing embodiment.

Fig. 7 is a composition example of a communication apparatus according to an embodiment of the present application. The communication means may be a first device including, but not limited to, a base station, a core network element. Fig. 7 shows a simplified schematic diagram of a base station structure. Base station 700 includes a processor 710 portion, a memory 720 portion, and a transceiver 730 portion. The processor 710 is mainly used for baseband processing, controlling a base station, and the like; the processor 710 is typically part of a control center of the base station, and may be generally referred to as a processor, for controlling the base station to perform the processing operations on the first device side in the above-described method embodiment. The memory 720 is used in part primarily to store computer program code and data. The transceiver 730 is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals and baseband signals; the portion of transceiver 730 may be generally referred to as a transceiver module, transceiver circuitry, or transceiver, among others. The transceiver module of the transceiver 730, which may also be referred to as a transceiver or a transceiver, includes an antenna 733 and radio frequency circuitry (not shown) that is primarily used for radio frequency processing. Alternatively, the means for implementing the receiving function in the transceiver 730 part may be regarded as a receiver and the means for implementing the transmitting function as a transmitter, i.e. the transceiver 730 part comprises the receiver 732 and the transmitter 731. The receiver may also be referred to as a receiving module, receiver, or receiving circuit, etc., and the transmitter may be referred to as a transmitting module, transmitter, or transmitting circuit, etc.

Processor 710 and memory 720 may include one or more boards, each of which may include one or more processors and one or more memories. The processor is used for reading and executing the program in the memory to realize the baseband processing function and control of the base station. If there are multiple boards, the boards can be interconnected to enhance processing power. As an alternative implementation manner, the multiple boards may share one or more processors, or the multiple boards may share one or more memories, or the multiple boards may share one or more processors at the same time.

For example, in one implementation, the transceiver module of the transceiver 730 is configured to perform the transceiver-related procedures performed by the base station (first device) in the foregoing method embodiments. The processor of the processor 710 is configured to perform the processes related to the processing performed by the base station in the foregoing method embodiments.

It should be understood that fig. 7 is merely an example and not a limitation, and that the network device including the processor, memory, and transceiver described above may not rely on the structure shown in fig. 7.

Fig. 8 is a composition example of another communication apparatus provided in an embodiment of the present application. The communication means may be a second device, which may be a terminal, including but not limited to an electronic device such as a mobile phone, a smart wearable device (e.g. a smart watch), etc. In the following, taking a mobile phone as an example, the communication device may include a processor 810, an external memory interface 820, an internal memory 821, a display 830, a camera 840, an antenna 1, an antenna 2, a mobile communication module 850, a wireless communication module 860, and the like.

It will be appreciated that the configuration illustrated in this embodiment does not constitute a specific limitation on the communication device. In other embodiments, the communication device may include more or fewer components than shown, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The processor 810 may include one or more processing units, such as: the processor 810 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (IMAGE SIGNAL processor, ISP), a controller, a video codec, a digital signal processor (DIGITAL SIGNAL processor, DSP), a baseband processor, and/or a neural-Network Processor (NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors.

It should be understood that the connection relationship between the modules illustrated in this embodiment is only illustrative, and is not limited to the configuration of the communication device. In other embodiments of the present application, the communication device may also use different interfacing manners, or a combination of multiple interfacing manners, in the foregoing embodiments.

The external memory interface 820 may be used to connect an external memory card, such as a Micro SD card, to enable expansion of the memory capabilities of the communication device. The external memory card communicates with the processor 810 through an external memory interface 820 to implement data storage functions. For example, files such as music, video, etc. are stored in an external memory card.

The internal memory 821 may be used to store computer-executable program code that includes instructions. The processor 810 executes various functional applications of the communication apparatus and data processing by executing instructions stored in the internal memory 821. The internal memory 821 may include a stored program area and a stored data area. The storage program area may store an application program (such as a sound playing function, an image playing function, etc.) required for at least one function of the operating system, etc. The storage data area may store data created during use of the communication device (e.g., audio data, phonebook, etc.), and so on. In addition, the internal memory 821 may include a high-speed random access memory, and may further include a nonvolatile memory such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (universal flash storage, UFS), and the like. The processor 810 performs various functional applications of the communication apparatus and data processing by executing instructions stored in the internal memory 821 and/or instructions stored in a memory provided in the processor.

The wireless communication function of the communication device may be implemented by the antenna 1, the antenna 2, the mobile communication module 850, the wireless communication module 860, a modem processor, a baseband processor, and the like.

The antennas 1 and 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in the communication device may be used to cover a single or multiple communication bands. Different antennas may also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed into a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 850 may provide a solution for wireless communication including 2G/3G/4G/5G, etc., applied to a communication device. The mobile communication module 850 may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA), and the like. The mobile communication module 850 may receive electromagnetic waves from the antenna 1, perform processes such as filtering, amplifying, and the like on the received electromagnetic waves, and transmit the processed electromagnetic waves to the modem processor for demodulation. The mobile communication module 850 may amplify the signal modulated by the modem processor, and convert the signal into electromagnetic waves through the antenna 1 to radiate the electromagnetic waves. In some embodiments, at least some of the functional modules of the mobile communication module 850 may be disposed in the processor 810. In some embodiments, at least some of the functional modules of the mobile communication module 850 may be disposed in the same device as at least some of the modules of the processor 810.

In some embodiments of the present application, the communication device initiates or receives a call request through the mobile communication module 850 and the antenna 1.

In addition, an operating system is run on the components. Such as iOS operating systems, android operating systems, windows operating systems, etc. Running applications may be installed on the operating system. It will be clearly understood by those skilled in the art that, for convenience and brevity, explanation and beneficial effects of the relevant content in any of the above-mentioned communication devices may refer to the corresponding method embodiments provided above, and are not repeated here.

Referring to fig. 9, the present application also provides a computer program product, in some embodiments, the method disclosed in fig. 2 above may be embodied as computer program instructions encoded on a computer readable storage medium in a machine readable format or encoded on other non-transitory media or article of manufacture.

Fig. 9 schematically illustrates a conceptual partial view of an example computer program product comprising a computer program for executing a computer process on a computing device, arranged in accordance with at least some embodiments presented herein.

In one embodiment, computer program product 900 is provided using signal bearing medium 901. The signal bearing medium 901 may include one or more program instructions 902 that when executed by one or more processors may provide the functionality or portions of the functionality described above with respect to fig. 2. Thus, for example, referring to the embodiment shown in fig. 2, one or more features of steps S100-S500 may be carried by one or more instructions associated with signal bearing medium 901. Further, the program instructions 902 in fig. 9 also describe example instructions.

In some examples, signal bearing medium 901 may comprise a computer readable medium 903 such as, but not limited to, a hard disk drive, compact Disk (CD), digital Video Disk (DVD), digital tape, memory, ROM or RAM, and the like.

In some implementations, the signal bearing medium 901 may comprise a computer recordable medium 904 such as, but not limited to, memory, read/write (R/W) CD, R/W DVD, and the like. In some implementations, the signal bearing medium 901 may include a communication medium 905 such as, but not limited to, a digital and/or analog communication medium (e.g., fiber optic cable, waveguide, wired communications link, wireless communications link, etc.). Thus, for example, the signal bearing medium 801 may be conveyed by a communication medium 905 in wireless form (e.g., a wireless communication medium conforming to the IEEE 802.15 standard or other transmission protocol).

The one or more program instructions 902 may be, for example, computer-executable instructions or logic-implemented instructions. In some examples, a computing device of the computing device may be configured to provide various operations, functions, or actions in response to program instructions 902 conveyed to the computing device through one or more of computer readable medium 903, computer recordable medium 904, and/or communication medium 905.

It should be understood that the arrangement described herein is for illustrative purposes only. Thus, those skilled in the art will appreciate that other arrangements and other elements (e.g., machines, interfaces, functions, orders, and groupings of functions, etc.) can be used instead, and some elements may be omitted altogether depending on the desired results. In addition, many of the elements described are functional entities that may be implemented as discrete or distributed components, or in any suitable combination and location in conjunction with other components.

It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and modules may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein.

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

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

In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The integrated modules may be implemented in hardware or in software functional modules.

The integrated modules, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, a substantial portion of the technical solution of the present application, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the procedures of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the technical scope of the embodiments of the present application.

Claims

1. A method of channel state feedback, the method comprising:

Generating configuration information, wherein the configuration information is used for indicating a target PDSCH and a demodulation reference signal (DMRS) associated with the target PDSCH, the configuration information is also used for indicating a target DMRS port, the target DMRS port is used for acquiring a first CSI report, and each of the target DMRS ports belongs to different DMRS Code Division Multiplexing (CDM) groups;

transmitting the configuration information and transmitting the DMRS so that a target terminal determines the first CSI report based on measurements of the DMRS;

receiving the first CSI report reported by the target terminal through a target PUCCH;

The first CSI report includes: channel quality index, CQI, comprising wideband CQI and/or sub-band CQI, the sub-band CQI comprising: n sub-band CQIs; wherein N is equal to the number of precoding resource block groups PRGs associated with the target PDSCH, and the size of the subband is the number of physical resource blocks PRBs contained in one of the precoding resource block groups PRGs; determining a reporting offset of a third CSI report, where the third CSI report is determined by a first terminal based on measurement of a first DMRS, and the third CSI report is sent through a first PUCCH, where the first PUCCH is used for transmitting the third CSI report and is not used for transmitting a hybrid automatic repeat request HARQ corresponding to a first physical downlink shared channel PDSCH;

Determining a reporting offset of a fourth CSI report, where the fourth CSI report is determined by a second terminal based on measurement of a second DMRS, and the fourth CSI report is sent through a second PUCCH, where the second PUCCH is used to transmit the fourth CSI report and a hybrid automatic repeat request HARQ corresponding to a second physical downlink shared channel PDSCH;

and the reporting offset of the third CSI report is smaller than the reporting offset of the fourth CSI report.

2. The method according to claim 1, wherein the method further comprises:

And sending interference configuration information, wherein the interference configuration information is associated with the scheduling configuration information of the target PDSCH, and the interference configuration information is used for determining an interference measurement mode when the first CSI report is determined.

3. The method of claim 1, wherein the first CSI report comprises: rank indication, RI; wherein, the value of the rank indication RI is less than or equal to the number of transmission layers of the target PDSCH.

4. The method of claim 1, wherein the CQI comprises: wideband CQI; the frequency domain resource corresponding to the target PDSCH is a discontinuous physical resource.

5. A method according to any one of claims 1 to 3, wherein the configuration information comprises: reporting a trigger field;

the reporting trigger field is used for indicating to report the first CSI report, and the reporting trigger field belongs to downlink control information DCI.

6. A method according to any of claims 1 to 3, wherein the configuration information is further used to indicate the channel type of the target PUCCH;

the channel type includes a channel type for carrying the first CSI report.

7. A method according to any one of claims 1 to 3, further comprising:

Receiving a hybrid automatic repeat request (HARQ) reported by the target terminal through the target PUCCH; wherein the HARQ corresponds to the target PDSCH, and a transmission priority of the HARQ is higher than a transmission priority of the first CSI report.

8. A method according to any one of claims 1 to 3, further comprising:

Receiving a second CSI report reported by the target terminal through the target PUCCH, wherein the second CSI report comprises a determination based on measurement of a channel state information reference signal (CSI-RS); the transmission priority of the first CSI report is higher than the transmission priority of the second CSI report.

9. A method of channel state feedback, the method comprising:

Acquiring configuration information sent by network equipment, wherein the configuration information is used for indicating a target PDSCH and a demodulation reference signal (DMRS) associated with the target PDSCH, the configuration information is also used for indicating a target DMRS port, the target DMRS port is used for acquiring a first CSI report, and each DMRS port in the target DMRS port belongs to different DMRS Code Division Multiplexing (CDM) groups;

determining the first CSI report based on measurements of the DMRS transmitted by the network device;

reporting the first CSI report through a target PUCCH;

the first CSI report includes: channel quality index, CQI, comprising wideband CQI and/or sub-band CQI, the sub-band CQI comprising: n sub-band CQIs; wherein N is equal to the number of precoding resource block groups PRGs associated with the target PDSCH, and the size of the subband is the number of physical resource blocks PRBs contained in one of the precoding resource block groups PRGs;

Determining a reporting offset of a third CSI report, where the third CSI report is determined by a first terminal based on measurement of a first DMRS, and the third CSI report is sent through a first PUCCH, where the first PUCCH is used for transmitting the third CSI report and is not used for transmitting a hybrid automatic repeat request HARQ corresponding to a first physical downlink shared channel PDSCH;

10. The method according to claim 9, wherein the method further comprises:

And acquiring interference configuration information, wherein the interference configuration information is associated with the scheduling configuration information of the target PDSCH, and the interference configuration information is used for determining an interference measurement mode when the first CSI report is determined.

11. The method of claim 9, wherein the first CSI report comprises: rank indication, RI; wherein, the value of the rank indication RI is less than or equal to the number of transmission layers of the target PDSCH.

12. The method of claim 9, wherein the CQI comprises: wideband CQI; the frequency domain resource corresponding to the target PDSCH is a discontinuous physical resource.

13. The method according to any one of claims 9 to 11, wherein the configuration information comprises: reporting a trigger field;

14. The method according to any of claims 9 to 11, wherein the configuration information is further used to indicate a channel type of the target PUCCH;

the channel type includes a channel type for carrying the first CSI report.

15. The method according to any one of claims 9 to 11, further comprising:

transmitting a hybrid automatic repeat request (HARQ) corresponding to the target Physical Downlink Shared Channel (PDSCH) through the target Physical Uplink Control Channel (PUCCH); wherein, the transmission priority of the HARQ is higher than the transmission priority of the first CSI report.

16. The method according to any one of claims 9 to 11, further comprising:

transmitting a second CSI report through the target PUCCH, wherein the second CSI report includes a determination based on measurements of a channel state information reference signal, CSI-RS; the transmission priority of the first CSI report is higher than the transmission priority of the second CSI report.

17. A network device, the network device comprising:

An information generating unit, configured to generate configuration information, where the configuration information is used to indicate a target PDSCH and a demodulation reference signal DMRS associated with the target PDSCH, and the configuration information is further used to indicate a target DMRS port, where the target DMRS port is used to obtain a first CSI report, and each of the target DMRS ports belongs to a different DMRS code division multiplexing CDM group;

An information transmitting unit, configured to transmit the configuration information and transmit the DMRS, so that a target terminal determines the first CSI report based on measurement of the DMRS;

a report receiving unit, configured to receive the first CSI report reported by the target terminal through a target PUCCH; the first CSI report includes: channel quality index, CQI, comprising wideband CQI and/or sub-band CQI, the sub-band CQI comprising: n sub-band CQIs; wherein N is equal to the number of precoding resource block groups PRGs associated with the target PDSCH, and the size of the subband is the number of physical resource blocks PRBs contained in one of the precoding resource block groups PRGs;

An offset determining unit, configured to determine a reporting offset of a third CSI report, where the third CSI report is determined by a first terminal based on measurement of a first DMRS, and the third CSI report is sent through a first PUCCH, where the first PUCCH is used for transmitting the third CSI report and is not used for transmitting a hybrid automatic repeat request HARQ corresponding to a first physical downlink shared channel PDSCH; determining a reporting offset of a fourth CSI report, wherein the fourth CSI report is determined by a second terminal based on measurement of a second DMRS, and the fourth CSI report is sent through a second PUCCH, and the second PUCCH is used for transmitting the fourth CSI report and a hybrid automatic repeat request HARQ corresponding to a second downlink shared channel PDSCH; and the reporting offset of the third CSI report is smaller than the reporting offset of the fourth CSI report.

18. A terminal device, characterized in that the terminal device comprises:

An information obtaining unit, configured to obtain configuration information sent by a network device, where the configuration information is used to indicate a target PDSCH and a demodulation reference signal DMRS associated with the target PDSCH, and the configuration information is further used to indicate a target DMRS port, where the target DMRS port is used to obtain a first CSI report, and each of the target DMRS ports belongs to a different DMRS code division multiplexing CDM group;

A signal measurement unit configured to determine the first CSI report based on measurements of the DMRS transmitted by the network device;

a report sending unit, configured to report the first CSI report through a target PUCCH; the first CSI report includes: channel quality index, CQI, comprising wideband CQI and/or sub-band CQI, the sub-band CQI comprising: n sub-band CQIs; wherein N is equal to the number of precoding resource block groups PRGs associated with the target PDSCH, and the size of the subband is the number of physical resource blocks PRBs contained in one of the precoding resource block groups PRGs;

19. A communication device comprising a processor, the processor being connected to a memory for storing a computer program, the processor being for executing the computer program stored in the memory to cause the communication device to perform the method of any one of claims 1 to 8.

20. A communication device comprising a processor, the processor being connected to a memory for storing a computer program, the processor being for executing the computer program stored in the memory to cause the communication device to perform the method of any one of claims 9 to 16.

21. A computer readable storage medium storing a computer program or instructions which, when executed by a processor, cause a method according to any one of claims 1 to 8, or 9 to 16 to be performed.