CN115190528A

CN115190528A - Communication method, device and system

Info

Publication number: CN115190528A
Application number: CN202110369549.8A
Authority: CN
Inventors: 李锐杰; 官磊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2022-10-14

Abstract

A communication method, a device and a system relate to the technical field of communication and solve the problem of low reliability of data transmission. The specific scheme is as follows: the terminal equipment receives a first PDSCH from the network equipment; and determining first information from the first PDSCH, the first information including second information, the second information being determined from the third information.

Description

Communication method, device and system

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method, apparatus, and system.

Background

Currently, network devices are able to schedule data according to channel state information. However, in case that the channel state information of the channel is inaccurate, the network device cannot schedule data according to the channel state information effectively, resulting in low reliability of data transmission.

Disclosure of Invention

The application provides a communication method, a communication device and a communication system, and solves the problem that data transmission in the prior art is low in reliability.

In order to achieve the purpose, the following technical scheme is adopted in the application:

in a first aspect, an embodiment of the present application provides a communication method, which is applied to a terminal device, and the method includes: receiving a first Physical Downlink Shared Channel (PDSCH) from a network device; and determining first information from the first PDSCH, the first information including second information, the second information being determined from the third information.

The terminal equipment receives downlink transmission from the network equipment, determines channel state information according to the downlink transmission, reports the channel state information to the network equipment, enables the network equipment to adjust parameters used for data transmission according to the channel state information reported by the terminal equipment, and accordingly improves reliability of data transmission through parameter adjustment.

In one possible implementation, the third information includes at least one of the following six items: a size of a target packet, a target block error rate (BLER), a target signal to interference plus noise ratio (SINR), a target Redundancy Version (RV), a first precoding matrix, a rank, at least one of the six items being associated with the first PDSCH.

In one possible implementation, the associating the size of the target data packet with the first PDSCH includes: the size of the target data packet is determined according to a first time unit, where the first time unit is a time unit for receiving the first PDSCH or a time unit for receiving the first indication information corresponding to the first PDSCH. Or, the size of the target data packet is obtained according to the size of the first data packet carried by the first PDSCH.

In one possible implementation, the target BLER is associated with the first PDSCH, and includes: the target BLER is determined according to a first modulation and coding scheme (MCS ) corresponding to the first PDSCH.

In one possible implementation, the target SINR is associated with the first PDSCH, including: the target SINR is determined from a first precoding matrix associated with the first PDSCH.

In one possible implementation, associating the first precoding matrix with the first PDSCH includes: the first precoding matrix is obtained according to data information of the first PDSCH or a demodulation reference signal (DMRS) corresponding to the first PDSCH. Alternatively, the first precoding matrix is determined according to a channel state information reference signal (CSI-RS), and the CSI-RS is associated with the first PDSCH.

In one possible implementation, the associating the CSI-RS with the first PDSCH includes: and the CSI-RS is associated with the first PDSCH through a CSI-RS reporting configuration identifier or a CSI-RS resource configuration identifier. Or the CSI-RS corresponds to CSI reporting information, and the CSI reporting information is the CSI reporting information which is closest to the first PDSCH and is earlier in time than the time of receiving the first PDSCH; or the CSI-RS resource is closest to the first PDSCH and precedes the time for receiving the first PDSCH. Or, the CSI-RS and the first PDSCH or the first indication information quasi-co-location (QCL) corresponding to the first PDSCH. Or the CSI-RS is associated with the first PDSCH or quasi-co-located information of the first indication information corresponding to the first PDSCH.

In one possible implementation, associating the target RV with the first PDSCH includes: the target RV is determined according to the RV corresponding to the first PDSCH.

In a possible implementation manner, the first information further includes a first Precoding Matrix Indicator (PMI), where the first PMI is used to indicate a first precoding matrix, and the first precoding matrix corresponds to the second information.

In a possible implementation manner, the second information adopts a wideband feedback mode or a narrowband feedback mode.

In a possible implementation manner, the communication method provided in the embodiment of the present application further includes: the first information is sent to the network device.

In a possible implementation manner, the second information is measurement information or offset information, and the offset information is determined according to the first reference value and the measurement information.

In one possible implementation, the first reference value is associated with the first PDSCH.

In one possible implementation, the associating the first reference value with the first PDSCH includes: the first reference value is determined according to a first MCS corresponding to the first PDSCH.

In a possible implementation manner, the communication method provided in the embodiment of the present application further includes: and sending feedback information to the network equipment, wherein the feedback information is Acknowledgement (ACK) information or Negative Acknowledgement (NACK) information, the ACK information is used for indicating that the decoding of the first PDSCH is successful, and the NACK information is used for indicating that the decoding of the first PDSCH is failed. Wherein the first information and the feedback information are transmitted in the same resource or different resources.

In a possible implementation manner, the communication method provided in the embodiment of the present application further includes: and receiving fourth information from the network equipment, wherein the fourth information is used for enabling the terminal equipment to determine the first information.

In one possible implementation, the size of the target data packet is obtained according to the size of the first data packet carried by the first PDSCH, and includes: the size of the target data packet is the size of a first data packet carried by the first PDSCH; or, the size of the target data packet is obtained according to the size of the first data packet carried by the first PDSCH and a preset relationship.

In one possible implementation, a rank is associated with the first PDSCH, including: the rank is obtained according to data information of the first PDSCH or a demodulation reference signal DMRS corresponding to the first PDSCH. Alternatively, the rank is determined according to the CSI-RS.

In a second aspect, an embodiment of the present application provides a communication method, which is applied to a terminal device, and the method includes: determining N fifth information, the N fifth information including K first information, the first information being determined according to the first PDSCH; and determining M pieces of target information according to the priorities of the N pieces of fifth information, and sending the M pieces of target information to the network equipment. Wherein N, K and M are positive integers, K is less than or equal to N, and M is less than or equal to N.

And when the time-frequency resource for transmitting the N pieces of fifth information is limited, determining M pieces of target information with higher priority from the N pieces of fifth information, and preferentially sending the M pieces of target information. This is advantageous for improving the performance of the communication system.

In a possible implementation manner, the priority of the N fifth information is determined according to a type corresponding to each fifth information.

In a possible implementation manner, the priority of the K pieces of first information is determined according to an index of a cell corresponding to each piece of first information, and the index of the cell is determined according to a cell where the first PDSCH corresponding to the first information is located.

In a possible implementation manner, the priority of the K pieces of first information is determined according to a CSI-RS reporting configuration identifier associated with each piece of first information.

In a possible implementation manner, the priority of the K pieces of first information is determined according to the association information corresponding to each piece of first information.

In a possible implementation manner, the priority of each of the K pieces of first information satisfies the following priority formula:

priority = A X Y + B X K + C + s (5)

Wherein A is determined by the number of cells and/or the total number of configured CSI-RS reports. Y is used for describing the type of CSI, and Y of one CSI type corresponds to one value. For example, Y may be determined according to the prioritization in mode 1. For example, for the first ordering of first CSI > a-CSI > SP-CSI on PUSCH > SP-CSI on PUCCH > P-CSI on PUCCH, the y value of the first CSI is smaller than the y value corresponding to a-CSI is smaller than the y value corresponding to SP-CSI on PUSCH is smaller than the y value corresponding to SP-CSI on PUCCH is smaller than the y value corresponding to P-CSI on PUCCH. For several other orderings the y-value can be determined with reference to the above example. Optionally, for the first priority ordering, the first CSI > a-CSI > SP-CSI on PUSCH > SP-CSI on PUCCH > P-CSI on PUCCH, the y value corresponding to the first CSI may be 0 or-1, and then the y value is added by 1 for each lower priority level.

B is determined according to the number of cells and/or the number of configured CSI-reports. K is used for describing whether the load is L1-RSPR or L1-SINR, and can be specifically introduced by referring to a priority formula in related elements. C is determined according to the total number of CSI-reports, and C denotes a cell index. s denotes a CSI-Report ID.

In a possible implementation manner, if a cell in which the first PDSCH is located includes a first cell, the index of the cell is the index of the first cell; if the cell where the first PDSCH is located includes a plurality of first cells, the index of the cell is a preset value.

In a possible implementation manner, the association information includes at least one of the following: first Downlink Control Information (DCI), and a first PDSCH, where the first DCI is used to schedule the first PDSCH.

In a possible implementation manner, the association information includes first DCI, and the priority of the K pieces of first information is determined according to the association information corresponding to each piece of first information, including: the priorities of the K first information are determined according to the order of the K first DCIs.

In a possible implementation manner, the association information includes the first PDSCH, and the priority of the K pieces of first information is determined according to the association information corresponding to each piece of first information, including: the priorities of the K first information are determined according to the order of the K first PDSCHs.

In a possible implementation manner, the M pieces of target information are M pieces of information with a higher priority level among the N pieces of fifth information.

In a possible implementation manner, the total bit number of the N fifth information is greater than the maximum number of carrying bits of the uplink channel, the total bit number of the M target information is less than or equal to the maximum number of carrying bits, and the uplink channel is used for carrying the M target information.

In a possible implementation manner, the communication method provided in the embodiment of the present application further includes: sending uplink information to the network equipment; the total bit number of the N fifth information and the uplink information is greater than the maximum bearer bit number of the uplink channel, the total bit number of the M target information and the uplink information is less than or equal to the maximum bearer bit number, and the uplink channel is used for bearing the M target information and the uplink information.

In a possible implementation manner, the uplink information includes at least one of the following: uplink data, and uplink control information.

In a possible implementation manner, the maximum number of bearer bits is determined according to at least one of the following: the code rate of the maximum bearing information supported by the uplink channel, the time domain resource occupied by the uplink channel, the frequency domain resource occupied by the uplink channel, the format of the uplink channel, and the modulation mode adopted by the uplink channel for transmitting the uplink data.

In a third aspect, an embodiment of the present application provides a communication method, which is applied to a network device, and the method includes: sending a first PDSCH to the terminal equipment, wherein the first PDSCH is used for determining first information, the first information comprises second information, and the second information is determined according to third information; and receiving the first information from the terminal device.

The network equipment can receive the channel state information reported by the terminal equipment and adjust the parameters used for data transmission according to the channel state information. Since the channel state information is determined by the terminal device according to the downlink transmission, the reliability of data transmission can be improved by adjusting the parameters.

In a possible implementation manner, the third information includes at least one of the following six items: a size of the target data packet, a target BLER, a target SINR, a target RV, a first precoding matrix, a rank, at least one of the six items being associated with the first PDSCH.

In one possible implementation, the target BLER is associated with the first PDSCH, including: the target BLER is determined based on a first MCS corresponding to the first PDSCH.

In one possible implementation, the target S1NR is associated with the first PDSCH, including: the target SINR is determined from a first precoding matrix associated with the first PDSCH.

In one possible implementation, associating the first precoding matrix with the first PDSCH includes: the first precoding matrix is obtained according to data information of the first PDSCH or according to a DMRS corresponding to the first PDSCH. Alternatively, the first precoding matrix is determined from a CSI-RS associated with the first PDSCH.

In a possible implementation manner, the associating the CSI-RS and the first PDSCH includes: and the CSI-RS is associated with the first PDSCH through a CSI-RS reporting configuration identifier or a CSI-RS resource configuration identifier. Or the CSI-RS corresponds to CSI reporting information, wherein the CSI reporting information is the CSI reporting information which is closest to the first PDSCH and is earlier in time than the time of receiving the first PDSCH; or the CSI-RS resource is closest to the first PDSCH and precedes the time for receiving the first PDSCH. Or the CSI-RS and the first PDSCH or the first indication information QCL corresponding to the first PDSCH. Or the CSI-RS is associated with the first PDSCH or quasi-co-located information of the first indication information corresponding to the first PDSCH.

In a possible implementation manner, the first information further includes a first PMI, where the first PMI is used to indicate a first precoding matrix, and the first precoding matrix corresponds to the second information.

In a possible implementation manner, the communication method provided in the embodiment of the present application further includes: and receiving feedback information from the terminal equipment, wherein the feedback information is ACK information or NACK information, the ACK information is used for indicating that the decoding of the first PDSCH is successful, and the NACK information is used for indicating that the decoding of the first PDSCH is failed. Wherein the first information and the feedback information are received in the same resource or different resources.

In a possible implementation manner, the communication method provided in the embodiment of the present application further includes: and sending fourth information to the terminal equipment, wherein the fourth information is used for enabling the terminal equipment to determine the first information.

In one possible implementation, a rank is associated with the first PDSCH, including: the rank is obtained according to data information of the first PDSCH or according to the DMRS corresponding to the first PDSCH. Alternatively, the rank is determined according to the CSI-RS.

In a fourth aspect, an embodiment of the present application provides a communication method, which is applied to a network device, and the method includes: sending a first PDSCH to the terminal equipment, wherein the first PDSCH is used for determining first information; and receiving M pieces of object information from the terminal device, the M pieces of object information being determined from the N pieces of fifth information according to priorities of the N pieces of fifth information, the N pieces of fifth information including K pieces of first information, wherein N, K and M are positive integers, K is less than or equal to N, and M is less than or equal to N.

priority = A X Y + B X K + C + s (5)

Wherein A is determined by the number of cells and/or the total number of configured CSI-RS reports. Y is used for describing the type of CSI, and Y of one CSI type corresponds to one value. For example, Y may be determined according to the prioritization in mode 1. For example, for the first ordering of first CSI > a-CSI > SP-CSI on PUSCH > SP-CSI on PUCCH > P-CSI on PUCCH, the y value of the first CSI is smaller than the y value corresponding to a-CSI is smaller than the y value corresponding to SP-CSI on PUSCH is smaller than the y value corresponding to SP-CSI on PUCCH is smaller than the y value corresponding to P-CSI on PUCCH. For several other orderings the y-value can be determined with reference to the above example. Optionally, for the first priority ranking, the first CSI > a-CSI > SP-CSI on PUSCH > SP-CSI on PUCCH > P-CSI on PUCCH, the y value corresponding to the first CSI may be 0 or-1, and then, for each lower priority, the y value is added by 1.

B is determined according to the number of cells and/or the number of configured CSI-reports. K is used to describe whether the bearer is L1-RSPR or L1-SINR, and may specifically be introduced with reference to the priority formula in the related elements. C is determined according to the total number of CSI-reports, and C denotes a cell index. s represents the CSI-Report ID, or s is determined in combination with the above mode 4, and the higher the priority of the first information is, the smaller s is.

In a possible implementation manner, if a cell where the first PDSCH is located includes a first cell, the index of the cell is the index of the first cell; if the cell where the first PDSCH is located comprises a plurality of first cells, the index of the cell is a preset value.

In a possible implementation manner, the association information includes at least one of the following: the first DCI is used for scheduling the first PDSCH.

In a possible implementation manner, the association information includes a first PDSCH, and the priority of the K pieces of first information is determined according to the association information corresponding to each piece of first information, including: the priorities of the K first information are determined according to the order of the K first PDSCHs.

Optionally, in a possible implementation manner of the present application, the communication method provided in the embodiment of the present application further includes: and receiving uplink information from the terminal equipment. The total bit number of the N fifth information and the uplink information is greater than the maximum bearer bit number of the uplink channel, the total bit number of the M target information and the uplink information is less than or equal to the maximum bearer bit number, and the uplink channel is used for bearing the M target information and the uplink information.

Optionally, in a possible implementation manner of the present application, the uplink information includes at least one of the following: uplink data and uplink control information.

Optionally, in a possible implementation manner of the present application, the maximum number of bearer bits is determined according to at least one of the following: the code rate of the maximum bearing information supported by the uplink channel, the time domain resource occupied by the uplink channel, the frequency domain resource occupied by the uplink channel, the format of the uplink channel, and the modulation mode adopted by the uplink channel for transmitting the uplink data.

In a fifth aspect, the present application provides a communication device comprising at least one module configured to perform the communication method of the first aspect or any one of the possible implementation manners of the first aspect. Alternatively, the communication device comprises at least one module for performing the communication method of the second aspect or any possible implementation manner of the second aspect.

In a sixth aspect, the present application provides a communication device comprising at least one module configured to perform the communication method of the third aspect or any possible implementation manner of the third aspect. Alternatively, the communication device comprises at least one module for performing the communication method of the fourth aspect or any possible implementation manner of the fourth aspect.

In a seventh aspect, the present application provides a communication device comprising a memory and a processor. The memory is coupled to the processor. The memory is for storing computer program code, the computer program code including computer instructions. When the processor executes the computer instructions, the communication device performs the communication method as any one of the possible implementations of the first aspect or the first aspect, or performs the communication method as any one of the possible implementations of the second aspect or the second aspect.

In an eighth aspect, the present application provides a communication device comprising a memory and a processor. The memory is coupled to the processor. The memory is for storing computer program code, the computer program code including computer instructions. When the processor executes the computer instructions, the communication device performs the communication method as any one of the possible implementations of the third aspect or the third aspect, or performs the communication method as any one of the possible implementations of the fourth aspect.

In a ninth aspect, the present application provides a chip system, which is applied to a communication device. The chip system includes one or more interface circuits, and one or more processors. The interface circuit and the processor are interconnected through a line; the interface circuit is configured to receive signals from the memory of the communication device and to send signals to the processor, the signals including computer instructions stored in the memory. When the processor executes the computer instructions, the communication device performs the communication method as any one of the possible implementations of the first aspect or the first aspect, or performs the communication method as any one of the possible implementations of the second aspect or the second aspect.

In a tenth aspect, the present application provides a chip system, which is applied to a communication device. The chip system includes one or more interface circuits, and one or more processors. The interface circuit and the processor are interconnected through a line; the interface circuit is configured to receive signals from the memory of the communication device and to send signals to the processor, the signals including computer instructions stored in the memory. When the processor executes the computer instructions, the communication device performs the communication method as any one of the possible implementations of the third aspect or the third aspect, or performs the communication method as any one of the possible implementations of the fourth aspect or the fourth aspect.

In an eleventh aspect, the present application provides a computer readable storage medium comprising computer instructions which, when run on a communication device, cause the communication device to perform the communication method as the first aspect and any one of its possible implementations, or to perform the communication method as the second aspect and any one of its possible implementations.

In a twelfth aspect, the present application provides a computer-readable storage medium comprising computer instructions that, when run on a communication apparatus, cause the communication apparatus to perform a communication method as any one of the possible implementations of the third aspect or the third aspect, or perform a communication method as any one of the possible implementations of the fourth aspect or the fourth aspect.

In a thirteenth aspect, the present application provides a computer program product comprising computer instructions which, when run on a communication apparatus, cause the communication apparatus to perform the communication method as the first aspect or any one of the possible implementations of the first aspect, or the communication method as the second aspect or any one of the possible implementations of the second aspect.

In a fourteenth aspect, the present application provides a computer program product comprising computer instructions which, when run on a communication apparatus, cause the communication apparatus to perform the communication method as any one of the possible implementations of the third aspect or the third aspect, or the communication method as any one of the possible implementations of the fourth aspect or the fourth aspect.

In a fifteenth aspect, the present application provides a communication system comprising at least one network device as described above and at least one terminal device as described above, configured to perform the method of any one of the above first to fourth aspects or any one of the possible ways of any one of the above aspects, when the network device and the terminal device are in the communication system.

These and other aspects of the present application will be more readily apparent from the following description.

Drawings

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

FIG. 2 is a schematic diagram of a time unit indicated by K1 according to an embodiment of the present disclosure;

fig. 3a is a schematic view of a scenario in which a terminal device determines a time unit according to an embodiment of the present application;

fig. 3b is a schematic diagram of a resource set of a PUCCH according to an embodiment of the present application;

fig. 3c is a schematic diagram of a terminal device feeding back a CQI according to an embodiment of the present application;

fig. 3d is a schematic diagram of reporting types of three channel states according to an embodiment of the present application;

FIG. 3e is a schematic diagram of slot n' provided in an embodiment of the present application;

fig. 3f is a schematic diagram of a CSI reference resource provided in an embodiment of the present application;

fig. 3g is a schematic diagram of a frequency domain indication method of a PDSCH provided in an embodiment of the present application;

fig. 3h is a schematic diagram of a frequency domain indication method of a PDSCH provided in the embodiment of the present application;

fig. 4 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 5 is a flowchart illustrating a communication method according to an embodiment of the present application;

fig. 6 is a flowchart illustrating a communication method according to an embodiment of the present application;

fig. 7 is a schematic diagram of a scenario for determining priority according to an embodiment of the present application;

fig. 8 is a second schematic view of a priority determination scenario provided in the embodiment of the present application;

fig. 9 is a third schematic view of a priority determination scenario provided in an embodiment of the present application;

FIG. 10 is a fourth exemplary scenario for determining priority according to an embodiment of the present application;

fig. 11 is a second flowchart illustrating a communication method according to a second embodiment of the present application;

fig. 12 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 13 is a second schematic structural diagram of a terminal device according to the second embodiment of the present application;

fig. 14 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Detailed Description

In this application, the words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present application, "a plurality" means two or more unless otherwise specified.

The communication method provided by the embodiment of the application is suitable for a communication system. Fig. 1 shows a structure of the communication system. As shown in fig. 1, the communication system may include: at least one access network device 11 and at least one terminal device 12. The access network device 11 and the terminal device 12 establish connection by using a wireless communication mode or a wired communication mode.

For example, the uplink transmission refers to terminal device 12 sending uplink information to access network device 11. The uplink information may include one or more of uplink data information, uplink control information, and a Reference Signal (RS). A channel for transmitting uplink information is referred to as an uplink channel, and the uplink channel may be a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH). The PUSCH is used to carry uplink data, which may also be referred to as uplink data information. The PUCCH is used to carry Uplink Control Information (UCI) fed back by the terminal device. The UCI may include Channel State Information (CSI), ACK/NACK, and the like.

Illustratively, the downlink transmission refers to the access network device 11 sending downlink information to the terminal device 12. The downlink information may include one or more of downlink data information, downlink control information, and downlink reference signals. The downlink reference signal may be a channel state information reference signal (CSI-RS) or a Phase Tracking Reference Signal (PTRS). A channel for transmitting downlink information is called a downlink channel, and the downlink channel may be a PDSCH or a Physical Downlink Control Channel (PDCCH). The PDCCH is used to carry DCI, and the PDSCH is used to carry downlink data, which may also be referred to as downlink data information.

Optionally, in the network architecture shown in fig. 1, a core network device 13 may also be included. The terminal device 12 may be connected to the access network device 11 in a wireless manner, and the access network device 11 may be connected to the core network device 13 in a wired or wireless manner. The core network device 13 and the access network device 11 may be separate physical devices, or the core network device 13 and the access network device 11 may be the same physical device, and all/part of the logical functions of the core network device 13 and the access network device 11 are integrated on the physical device.

In the network architecture shown in fig. 1, the terminal device 12 may be fixed or mobile, and is not limited thereto. The network architecture shown in fig. 1 may further include other network devices, such as a wireless relay device and a wireless backhaul device, without limitation. In the architecture shown in fig. 1, the number of terminal devices, access network devices, and core network devices is not limited.

The technical scheme in the embodiment of the application can be applied to various communication systems. Such as Long Term Evolution (LTE) system, fifth generation (5 g) mobile communication system, and future mobile communication system.

Based on the network architecture provided in fig. 1, dynamic scheduling and semi-static scheduling are described below.

And the access network equipment sends downlink control information to the terminal equipment under the condition of dynamic scheduling. And the terminal equipment receives the downlink control information sent by the access network equipment in the PDCCH. After receiving the downlink control information, the terminal device may receive downlink data carried on the PDSCH indicated by the downlink control information, and decode the received downlink data. If the terminal device successfully decodes the downlink data, the ACK feedback information may be sent to the network device. If the terminal equipment fails to decode the downlink data, the NACK feedback information may be sent to the network equipment.

When the access network equipment is in semi-persistent scheduling, the access network equipment sends higher layer signaling (for example, the higher layer signaling may be RRC control signaling) to the terminal equipment. After receiving the high-level signaling, if receiving activated downlink control information, the terminal device receives downlink data carried on the PDSCH sent by the network device according to the indication information in the activated downlink control information and the configuration of the high-level signaling. After receiving the downlink data, the terminal device may decode the downlink data and send ACK feedback information or NACK feedback information to the network device. The difference between semi-persistent scheduling and dynamic scheduling is that after being activated by downlink control information, indication and scheduling of the downlink control information are no longer needed in the subsequent downlink data transmission process.

Under the above dynamic scheduling or semi-static scheduling condition, before the terminal device sends ACK feedback information or NACK feedback information corresponding to the PDSCH to the access network device, it needs to determine the resource used for feeding back the ACK feedback information or NACK feedback information, and then send the ACK feedback information or NACK feedback information using the determined resource.

The resource of the ACK feedback information or NACK feedback information corresponding to the PDSCH is indicated by the network device. Illustratively, first, the network device indicates a first time unit to the terminal device through K1. Then, in the first time unit, the terminal device may determine, in combination with the indication information sent by the network device, the size of the payload (payload size), and other factors, the PUCCH resource used for sending the ACK feedback information or the NACK feedback information in the first time unit. The indication information may be a PUCCH Resource Indicator (PRI). The payload size refers to a size of information to be transmitted on the PUCCH resource, and may be, for example, 5 bits (bit).

Fig. 2 is a schematic diagram of a first time unit indicated by K1. As shown in fig. 2, K1 represents an interval between a time unit in which the PDSCH is located and a time unit in which the PUCCH is located. Specifically, the starting point of K1 is a time unit for the terminal device to receive the PDSCH, and the ending point of K1 is a first time unit for feeding back ACK feedback information or NACK feedback information corresponding to the PDSCH.

In some embodiments, in the case of dynamic scheduling, the indication information of K1 and the indication information for determining the PUCCH resource may be carried in DCI. In the case of semi-static scheduling, the indication information of K1 and the indication information for determining the PUCCH resource may be configured by higher layer signaling or may be determined by activating DCI of the semi-static scheduling.

A specific implementation manner of K1 is as follows: the network device configures a set of K1 to the terminal device in advance. Thus, the terminal device may determine a value from the set through the indication information of K1, and determine the first time unit for feeding back the ACK or NACK corresponding to the PDSCH according to the value.

For example, referring to fig. 2, assuming that the set of K1 configured by the network device for the terminal device is {1,2,3,4,5}, and the terminal device determines K1=5 through the indication information of K1, then as shown in fig. 3a, the terminal device determines that the first time unit is the fifth time unit after receiving the PDSCH.

After determining the first time unit for feeding back the ACK/NACK, the terminal device may determine a PUCCH resource for transmitting the ACK feedback information or the NACK feedback information within the first time unit.

It is understood that feedback of ACK/NACK supports feedback in the form of a codebook. The codebook is formed by combining a plurality of ACK/NACK into a series of sequences. For example, there are 5 PDSCHs, each decoded to NNAAN, where N denotes NACK and a denotes ACK. The decoding results of the 5 PDSCHs may be grouped into a bit sequence of 5 bits. And then feeds back 5 bits to the network device as a whole.

In one implementation, the resource set of the PUCCH is first determined according to the codebook size. The maximum load size (maxPayloadSize) in each resource set in the resource set combination associated with the terminal device may divide the codebook size of the UCI supported by the terminal device into several intervals. Taking fig. 3b as an example, the terminal device supports 4 resource sets, the maximum load size indicated in the resource set0 is 2 bits, the maximum load size indicated in the resource set1 is N2 bits, the maximum load size indicated in the resource set2 is N3 bits, and the maximum load size indicated in the resource set 3 is N4 bits. The four resource sets can divide the codebook size of the PUCCH which can be supported by the terminal equipment into four intervals, wherein the codebook size is less than or equal to 2 bits, the codebook size is more than 2 bits and less than or equal to N2 bits, the codebook size is more than N2 bits and less than or equal to N3 bits, and the codebook size is more than N3 bits and less than or equal to N4 bits. These four intervals correspond to resource set0, resource set1, resource set2, and resource set 3, respectively. The terminal selects the resource in which resource set to transmit according to which section the codebook size of the ACK/NACK to be transmitted belongs to. Wherein the specific values of N2, N3, and N4 can be configured through high layer signaling. In one implementation, the set of resources is configured by the network device.

Then a specific resource in the resource set is selected according to the dynamic indication information PRI in the DCI. The resource comprises one or more of the following parameters: and marking the resource identification of the resource, the format of the PUCCH, and the time domain, the frequency domain and the orthogonal code related to the format. Based on variables indicated in the resources, time-frequency resources for feeding back ACK/NACK may be determined.

In addition, when PUCCH resources are determined from a specific resource set according to PRI, PRI and implicit indication are supported in addition to the former direct indication with PRI. The PRI is generally 3 bits, and when the number of PUCCH resources in a PUCCH resource set is greater than 8, the PUCCH resources are divided into 8 subsets (subset), where the PRI indicates which subset is selected, and the selection of which resource in the subset is implicitly indicated by a Control Channel Element (CCE) index of the PDCCH.

Based on the network architecture provided in fig. 1, the measurement of channel state information is described below. Specifically, a Channel Quality Indicator (CQI) is selected as an example for description. As shown in fig. 3c, the network device (the network device is an access network device, a core network device, or other network devices) sends the CSI-RS to the terminal device, and the terminal device receives the CSI-RS at time t1 and obtains the CQI according to the CSI-RS measurement channel. And the terminal equipment feeds back the CQI to the network equipment at the time t2. And the network equipment schedules the downlink data according to the received CQI at the time t 3. That is, the CQI measured by the terminal device at time t1 is used by the network device at time t 3. Since the channel varies with time, the CQI fed back by the terminal device may be inaccurate. Because the CQI fed back by the terminal device may not accurately feed back the channel state information of the current channel, if the network device only schedules data according to the CQI fed back by the terminal device, higher data reliability may not be achieved.

For example, if the terminal device measures the channel at time t1, the channel condition is better, but when the network device actually schedules data at time t3, the channel condition is worse. If the network device only performs data scheduling according to the channel state information fed back by the terminal device, there is a high probability that data transmission errors occur. Therefore, the measured CQI cannot be used to accurately describe a channel state at the time of data transmission.

In the related art, in order to improve the accuracy of channel measurement, OLLA technology may be used to track the current state of a channel. However, when the OLLA technique is applied to a scenario where reliability of data transmission is high, the probability that the terminal device feeds back NACK to the network device is low (for example, the probability that the terminal device feeds back NACK is 10 in some scenarios) ^-6 The network device then sends 10 to the terminal device ⁶ For each downlink data, the terminal device feeds back NACK once), so that the network device cannot effectively track the current state of the channel, and thus cannot meet the requirement of high reliability of data transmission. Particularly, for an ultra-reliable and low latency communication (URLLC) scenario with a higher requirement on reliability, the problem of low reliability of data transmission is particularly prominent.

In order to solve the above problem, an embodiment of the present application provides a communication method. The terminal equipment receives downlink transmission from the network equipment, determines channel state information according to the downlink transmission, reports the channel state information to the network equipment, enables the network equipment to adjust parameters used by data transmission according to the channel state information reported by the terminal equipment, and accordingly improves reliability of data transmission through parameter adjustment.

For the convenience of those skilled in the art, related elements or technical terms referred to in the embodiments of the present application will be briefly described herein.

1. Terminal device

The terminal devices may be mobile terminal devices such as mobile phones (or called "cellular" phones) and computers with mobile terminal devices, as well as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices that exchange language and/or data with Radio Access Network (RAN) nodes. For example, the terminal device may be: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self driving (self driving), a wireless terminal device in remote surgery (remote medical supply), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), and the like.

2. Network device

The network device is a device deployed in a radio access network to provide a terminal device with a wireless communication function. Network devices may include various forms of macro base stations, micro base stations (also known as small stations), relay stations, access points, and the like. In systems of different radio access technologies, the names of network devices may differ. For example, in a global system for mobile communication (GSM) or Code Division Multiple Access (CDMA) network, a network device is called a Base Transceiver Station (BTS); in Wideband Code Division Multiple Access (WCDMA), a network device is called a Node B (NB); in a Long Term Evolution (LTE) system, a network device is called an evolved node B (eNB). The network device may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario. The network device may also be a base station device in a New Radio (NR) network. The network device may also be a wearable device or a vehicle mounted device. The network device may also be a Transmission and Reception Point (TRP).

3、CSI-RS

The downlink channel is typically measured by CSI-RS. And the network equipment sends the CSI-RS to the terminal equipment, and the terminal equipment is used for measuring channels and interference after receiving the CSI-RS. The terminal device calculates indexes to be measured, such as Rank Indicator (RI), precoding Matrix Indicator (PMI), CQI, and the like, according to the received CSI-RS, and then reports these. Two important parts of the CSI-RS configuration are CSI-RS reporting configuration (reportConfig) and CSI-RS resource configuration (ResourceConfig). The reporting configuration is used to configure parameters related to channel reporting, such as reporting type, reported measurement index, and the like. And the resource configuration is used for configuring the relevant information of the measured time-frequency resources.

The reporting types of the channel state can be divided into three types, namely periodic CSI (periodic CSI, P-CSI), semi-persistent CSI (SP-CSI) and aperiodic CSI (a-CSI). Wherein, the P-CSI is configured by Radio Resource Control (RRC), and is transmitted periodically, and does not need to be triggered after configuration. The SP-CSI is triggered by a Media Access Control (MAC) Control Element (CE) or DCI, and the triggering is followed by periodic transmission. The A-CSI is triggered by DCI, and is reported only once on a designated PUSCH in a designated time slot after being triggered. The DCI triggering the a-CSI is a DCI for triggering a physical downlink shared channel (PUSCH) for uplink data. As shown in fig. 3d, it is a schematic diagram of reporting types of three channel states.

The reported measurement indexes can be rank indication, precoding matrix indication, CQI and the like, and all or part of the reported measurement indexes can be selected by configuring variables in the reporting configuration.

In addition, the reporting of the channel state also supports wideband feedback and narrowband feedback. For wideband feedback, only one value is fed back in the whole reporting bandwidth, and for narrowband feedback, the feedback is fed back separately for each subband (subband). The size of each sub-band is defined in the protocol, and is specifically shown in table 1. For a fixed fractional Bandwidth (BWP), the number of Physical Resource Blocks (PRBs) included in each sub-band is fixed. For example, if a BWP contains 50 PRBs, the subband size is 4 or 8, and specifically which one can be specified by higher layer signaling. Moreover, the feedback may be discrete or continuous for narrow-band feedback.

TABLE 1

BWP(PRBs)	Size of sub-band (PRBs)
		＜24	N/A
24-72	4，8
		73-144	8，16
145-275	16，32

The resources of the CSI-RS may also be configured in three types, periodic, semi-persistent, and aperiodic. A certain relationship exists between the channel state reporting type and the corresponding measured resource configuration mode, which is specifically shown in table 2. As can be seen from table 2, for the periodically configured resources, P-CSI reporting, SP-CSI reporting, and a-CSI reporting may be supported, while for the aperiodic resources, only aperiodic reporting is supported.

TABLE 2

CSI-RS resource	P-CSI	SP-CSI	A-CSI
				Periodicity of the cycle	Support for	Support for	Support for
Semi-persistent property	Do not support	Support for	Support for
				Non-periodic	Do not support	Do not support	Support for

In addition, from the function of the CSI-RS resources, the CSI-RS resources can be divided into three types, which are: NZP-CSI-RS for channel, ZP-CSI-RS for interference and NZP-CSI-RS for interference.

The NZP-CSI-RS for channel indicates the NZP-CSI-RS used for channel measurement.

The ZP-CSI-RS for interference represents the CSI-RS used for interference measurement. And if the resources are configured, the resources in the resource set correspond to the resources in the NZP-CSI-RS for channel resource set in a one-to-one mode. Since the ZP-CSI-RS for interference is generally used for measuring interference, it is also generally referred to as CSI-IM (channel state information-interference measure).

The NZP-CSI-RS for interference means NZP-CSI-RS for measuring interference.

The differences between ZP-CSI-RS and NZP-CSI-RS are explained further below.

The ZP-CSI-RS refers to a zero power CSI-RS, and the essential meaning of the ZP-CSI-RS is that the target base station does not send any information on the configured ZP-CSI-RS, and the user performs detection on the resource, and the detected signal is interference (because the target base station does not send any information). The difference between the NZP-CSI-RS and the ZP-CSI-RS lies in that the NZP-CSI-RS transmits a known sequence on the configured resources, and a channel/interference can be obtained through the known sequence.

The following describes a CSI-RS measurement related configuration. The configuration related to the CSI-RS measurement mainly comprises CSI-RS reporting configuration, CSI-RS resource configuration and the like.

a. The CSI-RS reporting configuration is mainly used to configure information related to CSI reporting, and a few parameters related to the embodiment of the present application are briefly described below.

CSI-RS reporting configuration identifier (ReportConfigId): and the identity card identification number (ID) of the CSI-RS reporting configuration is used for marking the CSI-RS reporting configuration.

Configuring a resource of the CSI-RS for channel measurement (resource for channel measurement): and associating to the resource configuration through the CSI-RS resource configuration identifier.

Configuring a resource of CSI-RS for interference measurement (CSI-IM-resource ForInterference): by associating the CSI-RS resource configuration identity to the resource configuration, ZP-CSI-RS resources may also be used to describe the resources used for measuring interference.

Configuring NZP-CSI-RS resources for interference measurement (NZP-CSI-RS-resources for interference): and associating to the resource configuration through the CSI-RS resource configuration identifier.

The types of CSI reporting can be classified into periodic, semi-persistent and aperiodic reporting.

Reported amount (reportQuantity): different configurations can be adopted to select different CSI information to be reported by the terminal device, including CSI-RS Resource Indicator (CRI), RI, PMI, CQI, and the like.

b. The CSI-RS resource configuration is used to configure resource-related information for CSI measurement, and several parameters related to the embodiments of the present application are briefly described below.

CSI-RS resource configuration identification: and the ID of the CSI-RS resource configuration is used for marking the CSI-RS resource configuration and relating the CSI-RS reporting configuration through the variable.

Queue for configuration resource combination (CSI-RS-ResourceSetList): a set of resources for channel measurements and a set of resources for interference measurements may be included. Wherein the configuration of the set of resources is associated by NZP-CSI-RS-ResourceSetId and/or CSI-IM-ResourceSetId. The main differences of the resources configured in NZP-CSI-RS-resource eset and CSI-IM-resource eset are: and transmitting the CSI-RS with a known sequence in the NZP-CSI-RS resource, and measuring a channel or interference through the CSI-RS with the known sequence. And the CSI-IM resource is also called ZP-CSI-RS resource, no information is sent on the resource, and the received information is interference.

Type of resource (resourceType): can be divided into periodic resources, semi-persistent resources and aperiodic resources.

c. NZP-CSI-RS-ResourceSet for configuring a set of CSI-RS resources of the NZP, which may include at least one resource. And the terminal equipment measures the channel information according to the resources and feeds back the channel information. When a plurality of resources exist in one resource set, the terminal device specifically feeds back channel information measured on which resource, and the CRI variable fed back by the terminal device indicates, for example, CRI =0, that the channel information fed back by the terminal device is channel information measured on the resource with resource id =0.

NZP-CSI-RS-ResourceSetId: an ID representing or an identity of the NZP-CSI-RS resource set.

NZP-CSI-RS-Resources: the resources included in the resource set are related to each NZP-CSI-RS resource through the NZP-CSI-RS-resource id.

d. CSI-IM-ResourceSet: the resource set configured for measuring interference is similar to NZP-CSI-RS-resources set, and is not described herein again.

e. The NZP-CSI-RS-Resource is used for configuring information related to the NZP-CSI-RS Resource and is related to the Resource set through the NZP-CSI-RS-Resource id.

f. And the CSI-IM-Resource is used for configuring relevant information of the CSI-IM Resource. And associating the CSI-IM-resource ID into the CSI-IM resource set. Similar to NZP-CSI-RS resources, are not described in detail herein.

4. Time slot (slot)

One slot format may be an OFDM (orthogonal frequency division multiplexing) symbol containing a number of Orthogonal Frequency Division Multiplexing (OFDM) symbols. For example, a slot format may include 14 OFDM symbols, or a slot format may include 12 OFDM symbols; alternatively, one slot format is to contain 7 OFDM symbols. The OFDM symbols in one slot may be all used for uplink transmission; can be used for downlink transmission; and a part of the time domain symbols can be used for downlink transmission, a part of the time domain symbols can be used for uplink transmission, and a part of the time domain symbols can be flexibly configured to be used for uplink or downlink transmission. It should be understood that the above examples are illustrative only and should not be construed as limiting the present application in any way. The number of OFDM symbols contained in a slot and the use of the slot for uplink transmission and/or downlink transmission are not limited to the above examples for system forward compatibility. In this application, the time domain symbol may be an OFDM symbol, i.e., the time domain symbol may be replaced with an OFDM symbol.

5. Time cell

A time unit (also referred to as a time domain unit) may be one time domain symbol or several time domain symbols, or one mini-slot (mini-slot), or one slot, or one micro-slot (sub-slot), or one subframe (subframe), where a subframe may be 1 millisecond (ms) in duration in the time domain, one slot may be composed of 7 or 14 time domain symbols, and one mini-slot may include at least one time domain symbol (e.g., 2 time domain symbols or 7 time domain symbols or 14 time domain symbols, or any number of symbols less than or equal to 14 time domain symbols). The time unit size is only listed for convenience of understanding the scheme of the present application, and should not be understood to limit the present application, and it is understood that the time unit size may have other values and the present application is not limited thereto.

The time unit may include a radio frame (radio frame), a subframe, a slot, a mini slot, a micro slot, or an uplink symbol (symbol) or an isochronous domain unit. In 5G NR, an uplink time domain symbol may be simply referred to as an uplink symbol. The time domain length of one radio frame is 10ms. One radio frame may include 10 radio subframes, and the time domain length of one radio subframe is 1ms. One radio subframe may include one or more time slots, and how many time slots a subframe includes is related to the subcarrier spacing. For the case where the subcarrier spacing (SCS) is 15kHz, the time domain length of one slot is 1ms. One slot includes 14 Orthogonal Frequency Division Multiplexing (OFDM) uplink symbols.

6、MCS

The MCS is used to describe a modulation scheme and a code rate used for transmitting information. The network device or the terminal device configures an MCS index table (index table). In the table, each row corresponds to a set of modulation order, code rate and spectral efficiency. The network device may indicate to select a row in the table through the indication information, and further notify the terminal device of a modulation method, a code rate, and a spectrum efficiency used for transmitting data.

As shown in table 3, it is an MCS index table. As can be seen from table 3, different modulation orders correspond to different modulation schemes. For example, the modulation order Qm =2 corresponds to a Quadrature Phase Shift Keying (QPSK) modulation scheme, qm =4 corresponds to a 16 Quadrature Amplitude Modulation (QAM), and Qm =6 corresponds to a 64QAM. Generally, the modulation scheme, code rate, and spectral efficiency are determined by MCS index. For example, if the network device notifies the terminal device that the MCS index is 3, the terminal device can know from table 3 that the modulation order Qm =2, the code rate is 64/1024, and the spectrum efficiency is 0.1250. Namely, the adopted modulation mode is QPSK, the code rate is 64/1024, and the spectral efficiency is 0.1250.

Generally, a plurality of MCS index tables may be configured in the device, each MCS index table corresponds to a different reliability requirement, and which table is specifically selected may be configured to the terminal device by a higher-layer configuration parameter.

TABLE 3

7. CSI reference resource (CSI reference resource)

The CSI reference resource is a block of time-frequency resources determined according to the feedback time of the corresponding CSI. In the time domain, the length is one slot. In the frequency domain, it is the granularity of CSI measurements. If the measurement granularity of the corresponding CSI is wideband measurement, the frequency domain is the entire wideband, and if the measurement granularity is narrowband measurement, the frequency domain is the size of the narrowband. Thus, the frequency domain size and location of the CSI reference resource corresponds to the size and location of the CSI measurement.

The method for determining the time domain position of the CSI reference resource comprises the following steps: firstly, it is assumed that the CSI corresponding to the CSI reference resource is reported in slot n', and the position of the CSI reference resource is slot (n-n) _CSI-ref )。

Wherein n in slot n satisfies the following formula (1).

Wherein, mu _DL And mu _UL The specific meanings of the subcarrier intervals corresponding to uplink transmission and downlink transmission are shown in table 4.

TABLE 4

μ _DL And mu _UL	Subcarrier spacing
		0	15KHZ
1	30KHZ
		2	60KHZ
3	120KHZ

For slot (n-n) _CSI-ref ) In other words, the values in different cases are different.

In the first case, if the reporting period of the CSI corresponding to the CSI reference resource is P-CSI or SP-CSI, and the P-CSI and the SP-CSI only correspond to one CSI-RS/Synchronization Signal Block (SSB) measurement resource, then n _CSI-ref Comprises the following steps: is greater than or equal to

And the CSI reference resource is guaranteed to be a minimum value of a valid downlink slot (valid downlink slot).

To be provided with

And

for example, the slot distance of the CSI reference resource is equal to 1, and the slot distance of the CSI reporting is greater than or equal to 4 slots. As shown in fig. 3e, the CSI reference resource is located at the slot before the slot where a is located. And if the slot in which the A is located is the effective downlink time slot, the slot in which the A is located is the time slot in which the CSI reference resource is located. Otherwise, whether the slot in which the A-1 is located is an effective downlink time slot is judged. If so, the slot where the A-1 is located is the slot where the CSI reference resource is located, and so on.

N if P-CSI and SP-CSI correspond to multiple CSI-RS/SSB measurement resources _CSI-ref Comprises the following steps: greater than or equal to

And the CSI reference resource is ensured to be the minimum value of the effective downlink time slot. The specific meanings are as described above and are not described in detail.

In the second case, if the reporting period of the CSI corresponding to the CSI reference resource is a-CSI, and if the DCI triggering the CSI report and the time-frequency resource reporting the CSI are in one time slot, the time slot in which the CSI reference resource is located is the time slot in which the DCI triggering the CSI report is located. Otherwise, n _CSI-ref Comprises the following steps: greater than or equal to

And the CSI reference resource is ensured to be the minimum value of the effective downlink time slot. Wherein Z' is a parameter related to CSI processing latency.

It can be understood that a timeslot is an effective downlink timeslot if it satisfies the following condition: the time slot at least comprises a downlink or flexible symbol configured by a high-level signaling; and the time slot is not in the configured measurement gap. The measurement gap is a parameter configured for higher layer signaling.

It should be noted that the CSI reference resource has two main roles.

The first function is as follows: for P-CSI and SP-CSI, it is determined from the CSI reference resource what the resource employed when measuring CSI is. If a CSI reference resource is determined according to the timeslot where the CSI report is located, the resource used for measuring the CSI report must be located before the CSI reference resource. As shown in fig. 3f, it is assumed that the network device periodically configures the terminal device with measurement resources, i.e., CSI-RS shown in fig. 3 f. Then only the CSI-RS before the CSI reference resource can be employed in measuring the CSI. The specific one to be used may be further determined based on the indication information.

The second function is that: for calculating the CQI. The channel/interference measurements are obtained by CSI-RS measurements. Taking the channel measurement as an example, the network device may send the CSI-RS to the terminal device, and the terminal device may obtain the channel information according to the CSI-RS measurement. And then, after quantizing the obtained channel information, feeding back the channel information to the network equipment. For CQI, a plurality of quantization tables, e.g., 3, may be preconfigured. Which table is specifically used is further indicated by the indication information. Table 5 is a CQI table. As shown in table 5, the terminal device feeds back a CQI index to the network device. The network device may use the same table, i.e. the table in table 5, to determine the modulation scheme, the code rate, and the spectrum efficiency fed back by the terminal device according to the CQI index.

TABLE 5

The terminal device determines the CQI index in combination with the current channel state, CSI reference resources, and the target BLER. The target BLER is indicated to the terminal device by the network device and may be 0.1 or 0.00001. After the terminal device obtains the current channel state according to the CSI-RS measurement, it is assumed that a downlink data packet is transmitted on the CSI reference resource. The terminal equipment selects a maximum CQI index, which enables the BLER of the downlink packet transmitted on the CSI reference resource to be less than the target BLER when the downlink packet is transmitted on the current channel (in the measured channel state).

It should be noted that the terminal device quantizes the measured channel state information into a certain row in table 5, and feeds back the CQI index of the row to the network device. In the quantization process, even if the channel state information is the same, but the target BLER is different, or the downlink data packet size is different, different quantization values are obtained. For example, assume that the SINR measured by the terminal device through CSI-RS is 10dB, and the target BLER is 0.00001. Then, if the size of the downlink data packet is 1000 bits, the terminal may quantize the obtained CQI =10. If the size of the downlink data packet is 100 bits, the possibly quantized value of the terminal device is CQI =5. And, if the terminal device and the network device have different understandings about the size of the downlink data packet, it may cause the channel state information obtained by the network device to be wrong. For example, when the terminal device quantizes the channel state information, it is assumed that the size of the downlink data packet is 1000 bits, but when the network device recovers the channel state information through the quantization information fed back by the terminal device, it is assumed that the size of the data packet is 100 bits, so that the network device obtains different channel state information. Therefore, the second role of the CSI reference resource is to limit the terminal device and the network device to understand the same for the packet size. Since the terminal device and the network device understand the CSI reference resource identically (protocol written), when quantizing CQI, the terminal device assumes that a downlink packet is transmitted on the CSI reference resource, and quantizes CQI through the assumed downlink packet. Both the network device and the terminal device can know the size of the downlink data packet corresponding to the obtained CQI, so that errors in channel state information due to different understandings of the network device and the terminal device are avoided.

Further, comparing the MCS table shown in table 3 with the CQI table shown in table 5, it is possible to obtain modulation schemes, code rates, and spectrum efficiencies shown in each row of the two tables. That is, the nature of the two tables is the same. Usually, there are three MCS tables used for transmitting downlink data, and a terminal device may select a certain MCS table through indication information of a network device. Similarly, there are three CQI tables, and the terminal device may select a certain table through the indication information of the network device. And, one CQI table corresponds to one MCS table, and each row in the CQI table is obtained from the corresponding MCS table every other row. This saves overhead when feeding back CQI (16 rows only need 4bit information, if 32 rows, 5bit information is needed for quantization).

8. CSI priority

One CSI may correspond to one priority. The priority of the CSI is used for preferentially transmitting the CSI with high priority if time-frequency resources are limited when a plurality of CSI are transmitted, and the transmission of the CSI with high priority is ensured as much as possible.

Currently, a network device is allowed to configure multiple CSI, such as a first CSI, a second CSI, and a third CSI, for a terminal device. The types, measurement resources, reported measurement indexes and the like of the three CSI can be configured independently. For example, the first CSI is P-CSI, the second CSI is SP-CSI, and the third CSI is A-CSI. Or the first CSI, the second CSI and the third CSI are all P-CSI, but the periods are different. For example, as shown in fig. 3d, P-CSI may report CSI periodically and at different times.

The priority of the CSI satisfies the following formula (2).

Pri _iCSI (y，k，c，s)＝2·N _cells ·M _s ·y+N _cells ·M _s ·k+M _s ·c+s (2)

Wherein, pri _iCSI (y, k, c, s) is used to indicate the priority of the CSI, and a smaller value indicates a higher priority of the corresponding CSI.

If the type of CSI is a-CSI, y =0. If the type of CSI is SP-CSI and the SP-CSI is transmitted on PUSCH, y =1. If the type of CSI is SP-CSI and the SP-CSI is transmitted on PUCCH, y =2. If the type of CSI is P-CSI, y =3.

N _cells And c represents the index of the cell corresponding to the CSI.

M _s The maximum number of CSI-RS reports configured by the network equipment is shown, and the CSI-RS reporting configuration identifier is shown by s.

If the CSI reporting carries L1-reference signal received power (L1-RSRP) or L1-SINR (Layer 1 SINR), k =0, otherwise k =1. And the L1-RSRP and the L1-SINR are measurement report quantities of CSI.

9. Semi-static configuration

In NR, semi-persistent scheduling (SPS) technology supports a terminal device to configure multiple sets of SPS configurations (up to 8 sets of configurations), and parameters in each set of configurations are configured separately, and may be different.

Under each set of SPS configuration in a plurality of sets of SPS configurations, the transmission process of the PDSCH is as follows: the network equipment sends configuration information to the terminal equipment, wherein the configuration information comprises: the set of SPS configures corresponding index (index), scheduling period P, PUCCH resource (mainly configuring which PUCCH resource carrying ACK/NACK of SPS PDSCH is in which resource within one slot, such as those symbols, etc.), and MCS table (mainly used for indicating which of 3 MCS tables is used for SPS PDSCH). The network equipment sends an activated PDCCH to the terminal equipment, and the activated PDCCH indicates a time slot of the SPS PDSCH, a starting symbol S and a length L of the PDSCH in the time slot, and also indicates the time slot of feedback information corresponding to the SPS PDSCH. Specifically, the DCI carried in the PDCCH indicates a row in a time domain resource table, which may be a table predefined by a protocol or a table configured by higher layer signaling. The table contains a plurality of rows, each row containing: a K0 parameter (the number of slots indicating an interval between a slot in which the PDCCH is located and a slot in which the PDSCH is located), and indicating parameters of S and L. In this way, the terminal device may determine the feedback slot for the SPS PDSCH.

10. Frequency domain indication method of PDSCH

The frequency domain resource of the PDSCH is indicated by the frequency domain resource indication field of the PDCCH. There are two indication methods for the frequency domain resources of the PDSCH. The first indication method is type0, and the frequency domain granularity of the indication method is Resource Block Groups (RBGs). Take bandwidth of 10RB and resource block group size of 2RB as an example. As shown in fig. 3g, each resource block group size is 2 RBs, and thus 10 RBs are divided into 5 groups. The frequency domain resources occupied by the PDSCH are indicated in the form of a bitmap (bitmap). Taking the PDCCH indicating information as 10001, the PDSCH occupies RBG0 and RBG4.

The second indication method is type, whose frequency domain granularity is RB, which is allocated continuously. S and L indicating frequency domain are indicated in PDCCH. Wherein, RBstart represents the starting position of occupied RB, and L represents the length of occupied RB. Taking the bandwidth of 10RB as an example, as shown in fig. 3h, assuming that RBstart =2 and l =3, the frequency domain resources occupied by PDSCH are RB2, RB3, and RB4.

11. Control resource set (CORESET)

The terminal device may search for and detect PDCCH in one set of time-frequency resources. The time-frequency resource set for detecting the PDCCH is configured by the network device. For example, the network device may configure the time-frequency resource set (CORESET) for the terminal device through an Information Element (IE). In an implementation, a time-frequency resource set is configured with a time-frequency resource set pool index, and a time-frequency resource set corresponding to the same time-frequency resource set pool index may be divided into a time-frequency resource set pool, where a time-frequency resource set pool corresponds to a TRP.

For example, suppose that the network device configures 3 time-frequency resource sets, which are, respectively, CORESET0, CORESET1, and CORESET2, for the terminal device. Wherein CORESET0 and CORESET1 are associated with coresetpoolIndex =0, and coresetpoolIndex =1 associated with coreset2. Then, CORESET0 and CORESET1 are a group, and CORESET2 is a group. I.e. CORESET0 and CORESET1 belong to a time-frequency resource set pool 0, and CORESET2 belongs to a time-frequency resource set pool 1.

12. Outer Loop Link Adaptation (OLLA)

The OLLA technique is a technique for improving system performance by overcoming the time-varying characteristic of a wireless channel.

By using the OLLA technique, the network device may perform link adaptive adjustment according to ACK or NACK corresponding to downlink data fed back by the terminal device, that is, adjust parameters used by scheduling data, such as a signal-to-noise ratio (SNR). The network device determines a corresponding Modulation and Coding Scheme (MCS) according to the adjusted SNR, and schedules data by using the MCS, thereby realizing tracking of the current state of the channel to schedule data.

How to adjust the parameters used for scheduling data according to ACK or NACK specifically may be different implementations for different parameters. Illustratively, taking the SNR as an example of a parameter, the network device may determine the SNR by using the following equation (3).

SNR(i)＝SNR _CQI +Δ _offset (i) (3)

Wherein, SNR (i) represents the SNR used by the ith scheduling data of the network device, the SNR used by the ith scheduling data can also be understood as the SNR used by the current scheduling data, and SNR (i-1) represents the SNR used by the (i-1) th scheduling data or represents the SNR used by the previous scheduling data. SNR _CQI The SNR is represented by the SNR determined by the network device according to the channel state fed back by the terminal device, for example, channel Quality Information (CQI). Delta _offset (i) Represents the amount of OLLA adjustment of the i-th time, which is satisfied byThe following equation (4).

withΔ _offset (i)＝min{Δ _offset (i-1)+δ·1 _ACK -9δ·1 _NACK ，offset _max } (4)

Wherein, delta _offset And (i-1) represents the OLLA adjustment amount of the (i-1) th time, and δ represents a step, and the network device can be preset according to actual requirements, wherein the larger the step is, the larger the step is for adjusting the SNR each time. offset _max Represents the OLLA adjustment amount, which is the maximum value set by the system. 1 _ACK And 1 _NACK The values in different cases are different. For example, if the network device receives an ACK, 1 _ACK Is 1,1 _NACK Is 0. If the network device receives a NACK, 1 _ACK Is 0,1 _NACK Is 1.

Illustratively, assume SNR _CQI ＝20dB，δ＝1dB，Δ _offset (1)＝0。

When the network equipment transmits downlink data for the first time, SNR (1) = SNR of scheduling data _CQI ＝20dB。

And the terminal equipment receives and decodes the downlink data, and if the decoding is correct, the terminal equipment feeds back ACK (acknowledgement character) to the network equipment.

When the network device transmits downlink data for the second time, the SNR (2) =21dB for the scheduling data.

And the terminal equipment receives and decodes the downlink data, and if the decoding is correct, the terminal equipment feeds back ACK to the network equipment.

When the network device transmits downlink data for the third time, the SNR (3) =22dB for the scheduling data.

And the terminal equipment receives and decodes the downlink data, and if the decoding is wrong, the terminal equipment feeds back NACK to the network equipment.

When the network device transmits downlink data for the fourth time, the SNR (4) =13dB for the scheduling data.

From the above, Δ _offset (i) Is determined according to the ACK or NACK fed back by the terminal equipment. Due to SNR _CQI May be inaccurate and thus the network device may adjust the SNR used for scheduling data based on the actual transmission of the channel. If the last transmitted data is decoded correctly, the SNR is indicated _CQI The SNR is lower than that of the actual data transmission, so that the SNR can be improved a little when the data is scheduled, and the state change of the channel can be tracked well. For example, when the network device transmits the downlink data for the second time, the SNR is _CQI 20dB, while the SNR (2) of the actual scheduled data is 21dB.

The basic hardware structures of the access network device, the core network device and the terminal device are similar, and all include elements included in the communication apparatus shown in fig. 4. The hardware structures of the access network device, the core network device and the terminal device will be described below by taking the communication apparatus shown in fig. 4 as an example.

As shown in fig. 4, the communication device may include a processor 41, a memory 42, a communication interface 43, and a bus 44. The processor 41, the memory 42 and the communication interface 43 may be connected by a bus 44.

The processor 41 is a control center of the communication apparatus, and may be a single processor or a collective term for a plurality of processing elements. For example, the processor 41 may be a general-purpose Central Processing Unit (CPU), or may be another general-purpose processor. Wherein a general purpose processor may be a microprocessor or any conventional processor or the like.

For one embodiment, processor 41 may include one or more CPUs, such as CPU 0 and CPU 1 shown in FIG. 4.

For one embodiment, the communication device may include a plurality of processors, such as processor 41 and processor 45 shown in FIG. 4. Each of these processors may be a single-Core Processor (CPU) or a multi-Core Processor (CPU). A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer instructions).

The memory 42 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

In one possible implementation, the memory 42 may exist separately from the processor 41, and the memory 42 may be connected to the processor 41 through a bus 44 for storing instructions or program codes. The processor 41, when calling and executing the instructions or program codes stored in the memory 42, can implement the communication method provided by the following embodiments of the present application.

In another possible implementation, the memory 42 may also be integrated with the processor 41.

The communication interface 43 is used for connecting the communication device with other devices through a communication network, which may be an ethernet, RAN, wireless Local Area Network (WLAN), or the like. The communication interface 43 may comprise a receiving unit for receiving data and a transmitting unit for transmitting data.

The bus 44 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an extended ISA (enhanced industry standard architecture) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 4, but this does not indicate only one bus or one type of bus.

It is noted that the configuration shown in fig. 4 does not constitute a limitation of the communication apparatus, which may comprise more or less components than those shown in fig. 4, or a combination of some components, or a different arrangement of components, in addition to those shown in fig. 4.

Based on the above descriptions of the structures of the communication system and the communication device, the embodiment of the present application provides a communication method, and the following describes the communication method provided by the embodiment of the present application with reference to the drawings.

As shown in fig. 5, the communication method may include the following steps 501 to 505.

501. The network device sends the first PDSCH to the terminal device.

502. The terminal device receives a first PDSCH from the network device.

In some embodiments, the terminal device may receive the first indication information from the network device before receiving the first PDSCH from the network device, and receive the first PDSCH according to the received first indication information.

It is to be appreciated that the first PDSCH may be dynamically scheduled or semi-statically scheduled. If the scheduling is dynamic scheduling, the first indication information may be DCI. If the scheduling is semi-persistent scheduling, the first indication information may be higher layer signaling, for example, the higher layer signaling may be RRC signaling. Optionally, if the first PDSCH is semi-statically scheduled, the first indication information may be DCI activating the first PDSCH.

503. The terminal device determines first information according to the first PDSCH, wherein the first information comprises second information, and the second information is determined according to the third information.

It is understood that the first information includes the second information, and may also be expressed as: the first information includes second information obtained from the first PDSCH. Or the first information includes second information corresponding to the first PDSCH.

Optionally, the second information obtained according to the first PDSCH may specifically refer to second information obtained according to measurement of downlink data carried by the first PDSCH, or second information obtained according to measurement of a DMRS corresponding to the first PDSCH. It is understood that the second information is determined according to the third information, and may be further expressed as: the second information includes information determined based on the third information. Or the second information comprises information corresponding to the third information. Alternatively, the second information includes a first CQI, which is determined according to the third information. Or the second information includes MCS indication information, which is determined according to the third information. Or the second information includes a first CQI, and the first CQI is determined according to third information obtained by measuring downlink data carried by the first PDSCH. Or the second information includes a first CQI, and the first CQI is determined according to third information obtained by DMRS measurement corresponding to the first PDSCH. Or the second information includes MCS indication information, which is determined according to third information obtained from downlink data carried by the first PDSCH. Or the second information includes MCS indication information, which is determined according to third information obtained from the DMRS corresponding to the first PDSCH. Alternatively, the second information is determined based on the third information.

Specifically, after receiving the first PDSCH, the terminal device may obtain the third information according to the first PDSCH.

Optionally, the first information is channel state information.

Optionally, the third information includes at least one of the following six items: target packet size, target BLER, target to interference plus noise ratio (SINR), target RV, first precoding matrix, rank. Wherein at least one of the six items is associated with the first PDSCH. The terminal device may determine each item according to the association relationship between the item and the first PDSCH, so as to obtain the third information. Of course, the terminal device may also determine the third information in other manners, as follows.

It should be noted that the target packet may be a target Transport Block (TBS), and correspondingly, the size of the target packet may be a target Transport Block Size (TBS). Alternatively, the target data packet may be a target codeword (codeword), and correspondingly, the size of the target data packet is the size of the codeword.

1. The terminal device determines the size of the target data packet.

In one possible implementation, the target packet size is associated with the first PDSCH.

In a possible implementation manner, the terminal device may obtain the size of the target data packet according to the size of the first data packet carried by the first PDSCH. In another possible implementation manner, the terminal device may determine the size of the target data packet according to the first time unit. For the specific description of the time unit, reference may be made to the description of the time unit in the introduction of the related elements, which is not described herein again.

In some embodiments, the first time unit is a time unit when the terminal device receives the first PDSCH, or a time unit when the first indication information corresponding to the first PDSCH is received, for example, the time unit is a time slot, or a symbol in the time slot. For example, if the terminal device receives the first PDSCH at the

symbol

2,3, the first time unit is the

symbol

2,3.

In some embodiments, the first time unit is a time unit in which the first PDSCH is located, or a time unit in which the first indication information is located, for example, the time unit is a time slot, or a time domain symbol in the time slot. Taking the time unit as a slot as an example, if the terminal device receives the first PDSCH on the

symbol

2,3, the first time unit is a slot including the

symbol

2,3. It is understood that the role of the first time unit in the embodiment of the present application may be analogized to the second role of the CSI reference resource. That is, a candidate value for the size of the target packet may be defined with reference to the first time unit. In other words, the terminal device determines the size of the target data packet by the first time unit. In this way, the storage computation complexity of the terminal device can be saved. Since different first packet sizes will result in different CQIs even for the same SINR when channel state information, e.g., SINR, is quantized to CQI. If the size of the first data packet is arbitrary, the terminal device needs to calculate a corresponding CQI for an arbitrary first data packet, which will increase complexity. However, in the embodiment of the present application, the candidate value of the size of the first packet is defined by the first time unit, so that the computational complexity of computing the corresponding CQI is reduced. For example, since the number of possible sizes of the first data packet is limited, the corresponding relationship between the size of the first data packet and the CQI may be pre-stored in advance, so that the terminal device may obtain the CQI corresponding to the size of the first data packet only by searching the corresponding relationship.

Optionally, the size of the target data packet may be the size of the first data packet carried by the first PDSCH. Alternatively, the size of the target data packet may be obtained according to the size of the first data packet carried by the first PDSCH. For example, the size of the target packet may be determined based on the size of the first packet and the candidate set. The candidate set includes the size of one or more data packets, and the candidate set may be predefined, may be configured by the network device to the terminal device, or may be written by a protocol. The terminal device may determine the size of one data packet from the candidate set according to the size of the first data packet, and use the size of the data packet as the size of the target data packet. For example, assuming that the candidate set is {100bit,500bit,1000bit,2000bit }, if the size of the first packet is 300 bits, the size of the target packet determined from the candidate set is 500 bits. If the size of the first data packet is 50 bits, the size of the target data packet determined from the candidate set is 100 bits. If the size of the first data packet is greater than 1000 bits, the size of the target data packet determined from the candidate set is 2000 bits. As can be seen from this example, there is a correspondence between the size of the first packet and the size of the packet in the candidate set, and this correspondence is not limited in this embodiment of the present application.

For another example, the size of the target packet may be obtained by the size of the first packet and the predetermined relationship. The preset relationship may be predefined by a protocol, or may be configured by the network device to the terminal device.

In some embodiments, the predetermined relationship may be: a correspondence between a range of first packet sizes and sizes of candidate packets. In this way, the terminal device may determine a range to which the size of the first packet belongs, and then set the size of the candidate packet corresponding to the range as the size of the target packet. For example, the preset relationship may include: the range (0, 100 bit) corresponds to 100 bits, the range (101bit, 500bit) corresponds to 500 bits, the range (501bit, 1000bit) corresponds to 1000 bits, and the range (1001bit, 2000bit) corresponds to 2000 bits.

In some embodiments, the predetermined relationship may be: a correspondence between the first packet size and the target packet size. Therefore, the terminal equipment can determine the size of the target data packet directly according to the size and the corresponding relation of the first data packet. Alternatively, the size of the target packet may be the maximum value of the range to which the size of the first packet belongs. For example, when the first packet size is in the range (0, 100 bits), the target packet size is 100 bits. When the first packet size is in the range (101bit, 500bit), the target packet size is 500 bits. When the first packet size is in the range (501bit, 1000bit), the target packet size is 1000bit. When the first packet size is greater than 1000 bits, the target packet size is 2000 bits. The above range (x, y) is used to indicate that the range of numerical values is greater than or equal to x and less than or equal to y.

It should be noted that, if the number of streams of the data carried on the first PDSCH is less than or equal to a certain value, for example, 4, one data packet is carried on the first PDSCH, and the first data packet is the one data packet. If the number of streams of data carried on the first PDSCH is greater than a certain value, a plurality of data packets are carried on the first PDSCH. At this time, the first packet may be a sum of sizes of a plurality of packets. For example, the first PDSCH carries two data packets, the size of each data packet is 50 bits and 150 bits, and the size of the first data packet is 200 bits. Or, if multiple data packets are carried on the first PDSCH, the target data packet size is the size of one of the multiple data packets. Specifically, the packet size may be further indicated by the indication information. For example, the first PDSCH carries two data packets, the sizes of which are 50 bits and 150 bits, respectively, at this time, the indication information further indicates that the size of the target data packet is the size of the first data packet, that is, 50 bits. Alternatively, the target packet size is the size of the first/last packet of the plurality of packets. Alternatively, the target packet size is a packet size of a packet having a packet size minimum/maximum among the plurality of packets. For example, the first PDSCH carries two data packets, the size of each data packet is 50 bits and 150 bits, and if the size of the target data packet is the size of the data packet with the smallest size among the data packets, the size of the target data packet is 50 bits.

Optionally, the first data packet may be a first transport block, and correspondingly, the size of the first data packet may be a first TBS. Or the first data packet may be a first codeword, and correspondingly, the size of the first data packet is the size of the first codeword.

2. The terminal equipment determines the target BLER.

In one possible implementation, the target BLER is associated with the first PDSCH.

In one possible implementation, the terminal device may determine the target BLER according to the MCS corresponding to the first PDSCH. It is understood that the MCS corresponding to the first PDSCH may also be described as the MCS adopted by the first PDSCH. Specifically, the terminal device determines which MCS table is used for the first PDSCH transmission, and determines the target BLER according to the correspondence between the MCS table and the BLER. In this way, since the first information is obtained according to the measurement of the first PDSCH, it is more reasonable to determine the target BLER according to the first PDSCH when quantizing the first information.

It should be noted that, when one data packet is carried on the first PDSCH, the first MCS may be an MCS corresponding to the one data packet. When multiple data packets are carried on the first PDSCH, each data packet corresponds to one MCS (the MCS corresponding to each data packet may be configured independently, and thus the MCS corresponding to each data packet may be the same or different, but the table of the MCS used for the data carried by one PDSCH is the same). The first MCS may therefore be any one of the above-mentioned plurality of MCSs.

For example, assuming that the MCS table used for the first PDSCH transmission is table one or table two, and the BLER corresponding to table one or table two is 0.1, the target BLER is 0.1. Assuming that the MCS table adopted for the first PDSCH transmission is table three, and the BLER corresponding to table three is 0.00001, the target BLER is 0.00001.

In another possible implementation, the target BLER may be a preset value, for example, 0.00001. Illustratively, the target BLER may also be preset according to an actual scenario. For example, assuming that there are two BLERs of 0.1 and 0.00001, respectively, and the application scenario is a URLLC scenario, the target BLER may be preset to be 0.00001.

3. The terminal device determines a target SINR.

In one possible implementation, the target SINR is associated with the first PDSCH.

Specifically, the terminal device determines a target SINR according to the first PDSCH. Optionally, the terminal device may determine the target SINR according to the first precoding matrix associated with the first PDSCH, so as to determine the second information according to the target SINR. Alternatively, the first precoding matrix may be determined according to the rank, and the target SINR may be determined according to the first precoding matrix, thereby determining the second information according to the target SINR. Optionally, the number of columns of the first precoding matrix is equal to the rank. Optionally, the rank domain first PDSCH is associated. Optionally, the rank, or the first precoding matrix, is associated with the first PDSCH.

4. The terminal device determines a first precoding matrix.

In one possible implementation, the first precoding matrix is associated with the first PDSCH.

In one possible implementation, the first precoding matrix may be a preset value. Illustratively, the first precoding matrix may be an identity matrix, or a times the identity matrix. Here, the identity matrix refers to a matrix having diagonal elements of 1 and the remaining elements of 0. A is a constant that, in one possible implementation,

b is the number of streams (number of layers) of data carried on the first PDSCH, which is indicated by the first indication information, or is preconfigured, or is indicated by other indication information, and is not limited herein. Alternatively, the number of streams is the number of streams used for the first PDSCH transmission. Alternatively, the number of streams is equal to the rank, and the rank is associated with the second information.

Optionally, the first precoding matrix may be determined according to the rank, so that the second information is determined according to the first precoding matrix. Optionally, the rank is associated with the first PDSCH.

In a possible implementation manner, the terminal device obtains a first precoding matrix according to the first PDSCH.

In a possible implementation manner, the terminal device may obtain the first precoding matrix according to the data information of the first PDSCH or according to the DMRS corresponding to the first PDSCH. Optionally, the channel matrix is H, and if the precoding matrix used for transmitting the first PDSCH is P, the obtained first precoding matrix is H × P.

Alternatively, the terminal device may determine the first precoding matrix from CSI-RS associated with the first PDSCH.

Optionally, the CSI-RS is associated with the first PDSCH.

In a possible implementation manner, the CSI-RS and the first PDSCH are associated through a CSI-RS reporting configuration identifier, a CSI-RS resource configuration identifier, or a CSI-RS resource set identifier. In this way, by acquiring the CSI-RS reporting configuration identifier or the CSI-RS resource set identifier associated with the first PDSCH, the terminal device can obtain the corresponding CSI-RS, and thus can determine the first precoding matrix by using the CSI-RS. The CSI-RS reporting configuration identifier is an identifier of CSI-RS reporting configuration, the CSI-RS reporting configuration is used for configuring parameters related to channel reporting, such as the reporting type of a channel state and the reported measurement index, the CSI-RS resource configuration identifier is an identifier of CSI-RS resource configuration, and the CSI-RS resource configuration is used for configuring relevant information of measured time-frequency resources. Or the CSI-RS resource set identity is an NZP-CSI-RS resource set, or an identity of a resource set used for interference measurement. The detailed description of the CSI-RS, which can be described with reference to the related elements, is not repeated herein.

In a possible implementation manner, the terminal device may first determine CSI report information that is closest to the first PDSCH and is time prior to receiving the first PDSCH, and acquire a CSI-RS corresponding to the CSI report information, so that the CSI-RS may be used to determine the first precoding matrix. Or, the terminal device may first determine CSI report information that is closest to the first PDSCH and is time before the time of receiving the first PDSCH, and a precoding matrix used by the terminal device to obtain the CSI report information is the first precoding matrix. Or, the CSI reporting information is CSI reporting information located before the first time and closest to the first time. Wherein the first time is determined based on the first time period and the second time. Wherein the first time period is a predefined time period, e.g. may be a processing latency. The second moment is the moment of reporting the first information. Optionally, the time for reporting the first information may be a starting time of a first symbol of the time domain resource for reporting the first information, or an ending time of an ending symbol of the time domain resource for reporting the first information. Optionally, the CSI report information not only needs to satisfy the requirement that the time is closest to the first PDSCH and is prior to the time of receiving the first PDSCH, but also needs to satisfy the requirement that the CSI report information is closest to the first time before the first time, so as to ensure that the first precoding matrix can be determined before the second information is determined.

In one possible implementation manner, the terminal device may determine a CSI-RS resource that is closest to the first PDSCH and precedes a time of receiving the first PDSCH, and determine the first precoding matrix by using the CSI-RS resource. Or, the CSI-RS resource is a CSI-RS resource located before and closest to the first time instant. Wherein the first time is determined based on the first time period and the second time. Wherein the first time period is a predefined time period, which may be, for example, a processing latency. The second moment is the moment of reporting the first information. Optionally, the time for reporting the first information may be a starting time of a first symbol of the time domain resource for reporting the first information, or an ending time of an ending symbol of the time domain resource for reporting the first information. Optionally, the CSI-RS resource not only needs to satisfy the requirement that the time is closest to the first PDSCH and is prior to the time of receiving the first PDSCH, but also needs to satisfy the requirement that the time is before the first time and is closest to the first time, so as to ensure that the first precoding matrix can be determined before the second information is determined.

In a possible implementation manner, the terminal device may determine, according to a quasi-co-location (QCL) of the first PDSCH or the first indication information, a CSI-RS associated with the QCL, and determine the first precoding matrix by using a measurement resource of the CSI-RS. That is, the CSI-RS and the first PDSCH or the first indication information directly have a QCL relationship.

In a possible implementation manner, the terminal device may determine, according to quasi-co-location (QCL) information of the first PDSCH or the first indication information, a CSI-RS associated with the QCL information, and determine the first precoding matrix by using measurement resources of the CSI-RS. That is, the CSI-RS and the first PDSCH or the first indication information indirectly have a QCL relationship.

5. And the terminal equipment determines the target RV.

In one possible implementation, the target RV is associated with the first PDSCH.

In a possible implementation manner, the terminal device may determine the adopted target RV according to the RV corresponding to the first PDSCH.

Illustratively, the target RV employed is the same as the RV employed by the first PDSCH. For example, if the RV used by the first PDSCH is 0, it is determined that the target RV used by the second information is also 0.

In a possible implementation manner, the terminal device may determine the adopted target RV according to a predefined order and the RV corresponding to the first PDSCH.

Illustratively, the target RV used is the latter value of the RV corresponding to the first PDSCH in the predefined order. For example, assume that the predefined order is 0,2,3,1. Then, if the RV employed by the first PDSCH is 0, it is determined that the target RV employed by the second information is 2. And if the RV adopted by the first PDSCH is 1, determining that the target RV adopted by the second information is 0.

In a possible implementation manner, the terminal device may determine, according to the channel state and the first PDSCH, to calculate a target RV used for the second information, and report the target RV to the network device, and may implement reporting of the target RV by reporting indication information of the target RV, where the indication information of the target RV may be carried in the first information.

In a possible implementation manner, the terminal device determines the second information according to the target RV. And reporting the target RV to the network equipment, wherein the reporting of the target RV can be realized by reporting the indication information of the target RV, and the indication information of the RV can be carried in the first information.

6. The terminal device determines the rank.

In one possible implementation, a rank is associated with the first PDSCH.

In one possible implementation, the rank may be a preset value, for example, may be 1. The preset value can be predefined by a protocol or notified by a network device.

In one possible implementation, the terminal device obtains the rank according to the first PDSCH.

In a possible implementation manner, the terminal device may obtain the rank according to the data information of the first PDSCH or according to the DMRS corresponding to the first PDSCH. Alternatively, the terminal device may determine the rank from the CSI-RS.

For example, assuming that the number of streams employed for transmitting the first PDSCH is 3, the rank employed is 3.

Optionally, for specific description of determining the CSI-RS, reference may be made to the description of determining the CSI-RS in the above 4, which is not described herein again.

After determining the third information, the terminal device may determine the second information according to at least one of a size of the target data packet, a target BLER, an SINR, a target RV, a first precoding matrix, and a rank. Optionally, the second information is used to indicate at least one of: modulation mode, code rate, and spectrum efficiency.

Alternatively, the second information may be measurement information or offset information, and the offset information is determined according to the first reference value and the measurement information. The measurement information is information obtained by at least one of the size of the target packet, the target BLER, SINR, the target RV, the first precoding matrix, and rank.

Alternatively, the terminal device may calculate a difference between the measurement information and the first reference value, and use the difference as the offset information. For example, the terminal device may subtract the first reference value from the measurement information to obtain the offset information. Alternatively, the terminal device may subtract the measurement information from the first reference value to obtain the offset information. Wherein, the measurement information may be determined according to at least one of the size of the target data packet, the target BLER, SINR, the target RV, the first precoding matrix, and the rank. The information may also be determined in other manners, for example, configured in advance, specified by a protocol, and the like, and the embodiments of the present application are not limited herein.

In some embodiments, the first reference value may be a preset value. Alternatively, the terminal device may determine the first reference value according to the first MCS corresponding to the first PDSCH. Specifically, the terminal device may determine an MCS table used by a first MCS corresponding to the first PDSCH, and determine a CQI table corresponding to the MCS table used by the first MCS according to a correspondence between the MCS table and the CQI table. Then, the terminal device may determine a CQI index corresponding to the first MCS in the determined CQI table, and use the CQI index as the first reference value. Alternatively, when determining the CQI index corresponding to the first MCS, the terminal device may determine the CQI index, that is, determine the first reference value, by using the MCS index of the first MCS and the mapping relationship between the MCS index and the CQI index.

For example, the mapping relationship between the MCS index and the CQI index can be

The specific meaning is rounding down. A is the MCS index and B is the CQI index. For example, if a =3, B =1. If a =4, then B =2. If a =5, then B =2. Alternatively, the mapping relationship between the MCS index and the CQI index can be

The specific meaning is rounding up. For example, if a =3, B =2. If a =4, then B =2. If a =5, B =3. Of course, the mapping relationship between the MCS index and the CQI index may also be implemented in other ways, and the embodiment of the present application is not limited herein.

In one embodiment, the first reference value is an MCS index indicating a row in an MCS table in which the first MCS is located. Accordingly, offset information derived from the first reference value and the measurement information is also used to indicate a row in the MCS table. The MCS table in which the first MCS is located corresponds to the first PDSCH. Optionally, the MCS table is an MCS table used for the first PDSCH transmission. It can be understood that, in the present embodiment, the offset information is used to indicate a row in the MCS table, that is, at least one of the modulation scheme, the code rate, and the spectrum efficiency indicated by the offset information is determined by the MCS table in which the first MCS is located.

Has the advantages that: by feeding back the offset information, overhead of feeding back the second information can be saved. The transmission performance is improved.

After the terminal device determines the second information, the terminal device may determine the first information according to the second information.

Optionally, the first information may further include a first PMI, where the first PMI is used to indicate a first precoding matrix, and the first precoding matrix corresponds to the second information.

Optionally, the first information may further include a first Rank Indicator (RI), where the first RI is used to indicate a rank, and the rank corresponds to the second information. Optionally, the rank corresponds to the second information.

It should be noted that, in this embodiment of the application, if the first PDSCH carries one data packet, the terminal device determines the first information according to the data packet. If the first PDSCH carries a plurality of data packets, the terminal device determines the first information according to each data packet of the plurality of data packets, or determines the first information according to a combined data packet of the plurality of data packets. And the size of the joint data packet is the sum of the sizes of all data packets carried on the first PDSCH. Or when the first PDSCH carries multiple data packets, the terminal device determines one or more data packets in the multiple data packets according to the preset information. Further, the first information is determined according to the determined one or more data packets. The description for determining the first information according to one or more data packets may refer to the description related to the method for determining the first information according to the target data packet in the foregoing embodiment, and is not described again. The preset information may be configured by the network device or specified by the protocol.

504. The terminal device sends the first information to the network device.

Optionally, in this embodiment of the present application, in addition to determining the first information in the manner of step 503, that is, determining the first information according to the first PDSCH, the first information may also be obtained according to the first PDSCH and the CSI-RS together. Optionally, the second information included in the first information may be measured according to the first PDSCH and the CSI-RS. Wherein the CSI-RS is a CSI-RS associated with the first PDSCH. For a specific description of determining the CSI-RS associated with the first PDSCH, reference may be made to the description of determining the CSI-RS in step 4 in step 503, which is not described herein again.

Optionally, in this embodiment of the application, in addition to determining the first information in the manner of step 503, that is, determining the first information according to the first PDSCH, the first information may be obtained according to the first PDSCH and other PDSCHs together. Optionally, the second information included in the first information may be measured according to the first PDSCH and other PDSCHs. Optionally, the terminal device may send the first information to the network device when determining that the value of the first information is greater than or equal to the preset threshold. Otherwise, the terminal device does not send the first information.

Optionally, when the terminal device sends the first information to the network device, the second information included in the first information may adopt a broadband feedback mode or a narrowband feedback mode.

Specifically, the feedback mode adopted by the second information may be preconfigured, for example, the feedback mode may be a default broadband feedback mode. Alternatively, the feedback mode adopted by the second information may be configured by the indication information. If the feedback mode is the narrow-band feedback mode, the bandwidth of the narrow band is determined by the following method: under the condition that the first PDSCH is not subjected to interleaved transmission, if the indication Type of the first PDSCH is a Type0 Type, the bandwidth of a narrow band is the size of RBG; alternatively, for type0, if RBG =2, the wideband feedback mode is defaulted, i.e., if RBG =2, the narrowband feedback mode is not supported. For tpye1, when the number of RBs allocated by the first PDSCH is less than subband, one subband feedback is followed. In the case of the first PDSCH interleaved transmission, the size of the narrowband may be the size of a PRB bundle (PRB bundling) or equal to vrb-ToPRB-Interleaver (this variable is a variable for configuring the interleaving depth). The meaning of PRB bundling is that the terminal device may assume that the same TCI or QCL is used for data transmission in one PRB bundling.

It should be noted that, in the embodiment of the present application, the first indication information is also used for triggering feedback of the first information. That is, the first indication information is used not only to schedule the first PDSCH but also to trigger feedback of the first information.

505. The network device receives first information from the terminal device.

The terminal equipment receives downlink transmission from the network equipment, determines channel state information according to the downlink transmission, reports the channel state information to the network equipment, enables the network equipment to adjust parameters used by data transmission according to the channel state information reported by the terminal equipment, and accordingly improves reliability of data transmission through parameter adjustment.

Optionally, in this embodiment of the application, the terminal device may further send feedback information to the network device. The feedback information is ACK information or NACK information, the ACK information is used for indicating that the decoding of the first PDSCH is successful, and the NACK information is used for indicating that the decoding of the first PDSCH is failed.

In some embodiments, the first information and the ACK/NACK may be fed back jointly or independently. When the first information and the ACK/NACK are jointly fed back, the first information and the ACK/NACK may be jointly encoded, or both may be independently encoded.

Optionally, the first information and the ACK/NACK may be fed back jointly or independently. When the first information and the ACK/NACK are jointly fed back, the first information and the ACK/NACK can be jointly coded or the first information and the ACK/NACK can be independently coded.

Optionally, the first information and the ACK/NACK may be fed back in the same resource, or may be fed back in different resources. When fed back in the same resource, the first information and the ACK/NACK may be jointly coded or may be independently coded at this time. The first information and the ACK/NACK may be independently encoded when fed back in different resources. The beneficial effects of independent coding are: the processing of the first information and the feedback information is relatively independent, and an error in one does not affect the transmission of the other. For example, if the feedback information is wrong, the transmission of the first information is not affected because the feedback is in a separate resource. Wherein, the feedback information is wrong, and the possible reason is that the load size of the feedback information is determined to be wrong. For example, there is originally only 1bit of feedback information, but the terminal device considers that there is 2bit.

For example, when the first information and the ACK/NACK are fed back at two different time units, the first information and the ACK/NACK are fed back independently and coded independently.

For another example, when the first information and the ACK/NACK are fed back on different PUCCHs in the same time unit, the first information and the ACK/NACK are fed back independently and coded independently.

For example, when the first information and the ACK/NACK are fed back on the same PUCCH in the same time unit, the first information and the ACK/NACK are fed back jointly, and in this case, the first information and the ACK/NACK may be encoded independently or jointly.

For another example, assume that the bit corresponding to the feedback information is 01, and the bit corresponding to the first information is 10. When joint coding is performed, one possible implementation is to put the bit of the feedback information and the bit of the first information together to be 0110. And jointly performing channel coding, modulation and the like by taking 0110 as a whole. In this embodiment, the bit information corresponding to the feedback information is before, and the bit corresponding to the first information is after. Such a sequence is only for explaining the joint coding, and is not unique, and it is needless to say that the bit information corresponding to the first information is before and the bit corresponding to the feedback information is after. The specific order may be further indicated by the network device or predefined by the protocol. The independent coding means that the bit corresponding to the feedback information performs channel coding independently, and the bit information of the first information performs channel coding independently as well.

For another example, if the first PDSCH carries two data packets, it may happen that one data packet is decoded successfully and the other data packet is decoded unsuccessfully. In this case, in one implementation, ACK/NACK corresponding to each data packet carried by the first PDSCH may be fed back independently. In another implementation, the ACK/NACK corresponding to all data packets carried by the first PDSCH may be fed back jointly, that is, the first PDSCH corresponds to one ACK/NACK. And under the condition of joint feedback, the method for determining the ACK/NACK corresponding to the first PDSCH is as follows: and respectively taking 'and' from the feedback information corresponding to the two data packets carried by the first PDSCH, thereby obtaining the final feedback information corresponding to the first PDSCH. Specifically, assuming that A represents ACK and N represents NACK, then A and N are N, A and A are A, and N is N.

Under the condition that the terminal equipment is configured with the joint feedback, the terminal equipment does not need to feed back the first information to the network equipment. Or, the terminal device determines the second information corresponding to the two data packets, and feeds back the two second information to the network device, and the specific description of the second information corresponding to the data packet may refer to the related description in step 503, which is not described herein again. And, under the condition that the time-frequency resource for transmitting the second information is not enough, the terminal device may preferentially transmit the second information corresponding to the first data packet, that is, the priority of the first data packet is higher than that of the second data packet. Optionally, the channel state information corresponding to the second data packet is CSI Part II.

It should be noted that, in the embodiment of the present application, the content of the first information and the feedback information are related. Optionally, the feedback information is used to indicate a direction of the second information feedback. Specifically, if the feedback information is ACK, it indicates that the feedback direction of the second information is to increase the level of the modulation and coding scheme. If the feedback information is NACK, the direction of the second information feedback is the level of the reduction modulation coding scheme. In one implementation, an offset set of the second information corresponding to ACK, whose value is used to indicate the level of MCS to be increased, and an offset set of the second information corresponding to NACK, whose value is used to indicate the level of MCS to be decreased, may be configured in advance. Optionally, the values in the offset set need to satisfy the following condition: if the offset information is obtained by subtracting the first reference value from the measurement information, the number of values greater than 0 in the offset set corresponding to ACK is greater, and the number of values less than 0 in the offset set corresponding to NACK is greater. If the offset information is obtained by subtracting the measurement information from the first reference value, the number of values greater than 0 in the offset set corresponding to ACK is small, and the number of values less than 0 in the offset set corresponding to NACK is small.

For example, the offset information is obtained by subtracting the first reference value from the measurement information, the feedback information is ACK, the corresponding offset set may be { -1,0,1,2}, and when the feedback information is NACK, the corresponding offset set may be { -2, -1,0,1}. Alternatively, the feedback information is ACK, the corresponding set of offsets may be-2,0,2,4, correspondingly, the feedback information is NACK, and the corresponding set of offsets may be-4, -2,0,2. Alternatively, the feedback information is ACK, the corresponding set of offsets may be {0,1,2,3}, correspondingly, the feedback information is NACK, and the corresponding set of offsets may be { -3, -2, -1,0}.

Optionally, in this embodiment of the present application, the communication method provided in this embodiment of the present application may further include: and the network equipment sends the fourth information to the terminal equipment, and the terminal equipment receives the fourth information from the network equipment. The fourth information is used to enable the terminal device to determine the first information. The fourth information may be the first indication information. That is, the terminal device triggers the determination of the first information only after receiving the fourth information. Thus, the determination of the first information is more flexible, and the expenditure can be saved.

As shown in fig. 6, the communication method may include the following steps 601 to 603.

601. The terminal device determines N pieces of fifth information, wherein the N pieces of fifth information comprise K pieces of first information.

Wherein N, K is a positive integer, and K is less than or equal to N. When K is smaller than N, the N fifth information may further include CSI obtained according to CSI-RS measurement.

Optionally, K is greater than 0.

For the specific description of determining the first information by the terminal device, reference may be made to the description of determining the first information in fig. 5, which is not described herein again. Optionally, the first information is determined according to the first PDSCH. Optionally, the first information is determined according to the first PDSCH and other PDSCHs. Optionally, the first information is determined according to the first PDSCH and CSI-RS.

602. And the terminal equipment determines M pieces of target information according to the priorities of the N pieces of fifth information.

Wherein M is a positive integer, M is less than or equal to N, and the M pieces of object information refer to M pieces of object information selected from the N pieces of fifth information. Of course, M may also be 0, that is, the target information is not determined, which indicates that the current time-frequency resource is preferred, and other information with priority higher than the fifth information, such as uplink control information, needs to be preferentially transmitted.

Optionally, the M pieces of target information are M pieces of target information with a higher priority in the N pieces of fifth information.

Specifically, the determining of the priority of each of the N fifth information may specifically adopt at least one of the following five ways.

And in the mode 1, the priority of each piece of fifth information is determined according to the type corresponding to each piece of fifth information.

The types corresponding to the fifth information may include four types, which are a-CSI, SP-CSI, P-CSI, and the type of the first information. The SP-CSI can be divided into two types according to the transmission of the SP-CSI on a PUCCH or a PUSCH, wherein the two types are respectively an SP-CSI on PUSCH and an SP-CSI on PUCCH, and the priorities of the two types are different. In this case, the prioritization of the A-CSI, SP-CSI on PUSCH, SP-CSI on PUCCH, P-CSI, and the first information may be as follows. The specific priority ranking may be determined by an actual scenario, and the embodiment of the present application is not limited herein. The present application introduces the reasons for each prioritization.

In the present embodiment, a > B means that a has a higher priority than B, and a = B means that a and B have the same priority.

1. First information > A-CSI > SP-CSI on PUSCH > SP-CSI on PUCCH > P-CSI

The first information has the highest priority in the first prioritization. Because the first information is CSI obtained by the network equipment triggering terminal equipment based on downlink data measurement, and the active triggering of the network equipment indicates that the network equipment has a demand for the first information, the priority of the first information is configured to be the highest so as to ensure that the first information can be preferentially sent to the network equipment.

2. A-CSI & gtfirst information & gtSP-CSI on PUSCH & gtSP-CSI on PUCCH & gtP-CSI

The second priority ranking has the first information with a lower priority than the a-CSI. Since the first information is obtained based on downlink data measurement, transmission of downlink data only occupies a part of bandwidth, and the first information can only represent channel state information on the bandwidth of data transmission. For example, the total bandwidth includes 100 RBs, numbered 0-99. If the transmission of downlink data occupies RB0, RB1, RB2, the first information can represent only channel state information on the three RBs. And the A-CSI is obtained according to CSI-RS measurement, the transmission of the CSI-RS can occupy the whole bandwidth, and the A-CSI can represent the channel state information on the full band of RB0 to RB 99. The priority of the first information is lower than that of the a-CSI. And since the type of the first information is similar to that of the A-CSI, the priority of the first information is higher than that of the SP-CSI and the P-CSI.

3. A-CSI & gtSP-CSI on PUSCH & gtfirst information & gtSP-CSI on PUCCH & gtP-CSI

And in the third priority ordering, the priority of the first information is lower than that of the SP-CSI on PUSCH and higher than that of the SP-CSI on PUCCH. Because the first information is CSI obtained by the network device triggering the terminal device based on downlink data measurement, the active triggering of the network device indicates that the network device has a need for the first information, and thus the priority of the first information is higher. Since CSI transmitted on PUSCH has higher priority than CSI transmitted on PUCCH, if the first information is transmitted on PUCCH, the priority of the first information is lower than that of SP-CSI on PUSCH and higher than that of SP-CSI on PUCCH.

4. A-CSI & gtSP-CSI on PUSCH & gtSP-CSI on PUCCH & gtfirst information & gtP-CSI

5. A-CSI & gtSP-CSI on PUSCH & gtSP-CSI on PUCCH & gtP-CSI & gtfirst information

The fifth prioritization has the lowest priority for the first information. Since the first information is obtained based on downlink data measurement, transmission of downlink data only occupies a part of bandwidth, and the first information can only represent channel state information on the bandwidth of data transmission. The A-CSI, the SP-CSI and the P-CSI are all channel state information obtained according to CSI-RS measurement, transmission of the CSI-RS can occupy the whole bandwidth, and the A-CSI, the SP-CSI and the P-CSI can represent the channel state information on the whole band. Therefore, the first information can provide less channel state information and has a low priority.

6. A-CSI = first information > SP-CSI on PUSCH > SP-CSI on PUCCH > P-CSI

The priority of the first information in the sixth prioritization is equal to the priority of the a-CSI. Since the first information and the a-CSI are both triggered by the indication information and only reported once, the type of the first information is similar to that of the a-CSI, and the priority of the first information can be configured to be equal to that of the a-CSI.

7. a-CSI > SP-CSI on PUSCH = first information > SP-CSI on PUCCH > P-CSI

8. A-CSI > SP-CSI on PUSCH > SP-CSI on PUCCH = first information > P-CSI

The priority of the first information in the eighth prioritization is equal to the priority of the SP-CSI on PUCCH. Since both the first information and the SP-CSI on PUCCH are transmitted on the PUCCH and both require triggering of the indication information in the case that the first information is transmitted on the PUCCH, the priority of the first information may be configured to be equal to the priority of the SP-CSI on PUCCH.

9. A-CSI > SP-CSI on PUSCH > SP-CSI on PUCCH > P-CSI = first information

And 2, determining the priority of each piece of first information according to the index of the cell corresponding to each piece of first information.

Specifically, the index of the cell corresponding to the first information may be determined according to the cell where the first PDSCH is located, and the priority of the first information may be determined according to the index of the cell corresponding to the first information.

In an implementation manner, if the first information is obtained according to the first PDSCH measurement, the cell where the first PDSCH is located is the cell corresponding to the first information. If the cell where the first PDSCH is located only includes one first cell, the index of the cell corresponding to the first information is the index of the first cell.

In an implementation manner, if the first information is measured according to other downlink data or CSI-RS in addition to the first PDSCH, the cell corresponding to the first information includes the cell where the first PDSCH is located, or the cell where other downlink data is located, or the cell where CSI-RS is located. At this time, the first information may correspond to a plurality of cells. Or, the first information is obtained by measuring signals of a plurality of cells, and an index of a cell corresponding to the first information is a preset value. Optionally, the preset value may be 0, or the preset value may be-1, or the preset value may be d, or the preset value may be greater than d, or the preset value may be any one of the indexes of the plurality of first cells, or the preset value may be a smaller value or a larger value of the indexes of the plurality of first cells. Wherein, the smaller the value of the preset value is, the higher the priority of the first information is. d is the maximum value among the indexes of the cells in the currently activated cell. The preset value is not limited in the embodiment of the present application.

Optionally, if the cell where the first PDSCH corresponding to the first information is located is the same as the cell where the CSI-RS is located, determining that the index of the cell corresponding to the first information is the index of the cell where the first PDSCH is located.

And 3, determining the priority of each piece of first information according to the CSI-RS reporting configuration identifier associated with each piece of first information.

Specifically, the first information is obtained according to the first PDSCH measurement, and the first information does not relate to the CSI-RS reporting configuration, that is, there is no CSI-RS reporting configuration identifier corresponding to the first information. Therefore, a CSI-RS reporting configuration identifier associated with each piece of first information may be preconfigured, where the CSI-RS reporting configuration identifier may be a preset value, and then, according to the preset value, the priority formula in the introduction of the relevant elements in the above embodiment is used to obtain the priority of the first information. Optionally, the preset value may be 0, or may be-1. The preset value is not limited in the embodiment of the present application.

And 4, determining the priority of each piece of first information according to the associated information corresponding to each piece of first information.

The association information corresponding to the first information may include at least one of the following first DCI and first PDSCH. The first DCI is used to schedule the first PDSCH, and the first information is measured according to the first PDSCH.

In an implementation manner, when the association information is the first DCI, K is greater than 1, and the first DCI is dynamically scheduled, the terminal device may determine priorities of the K first information according to an order of the K first DCI. Specifically, the terminal device may sort the K first DCIs by using a preset rule. Optionally, the preset rule may be a rule of a frequency domain dimension, a rule of a time dimension, a rule of a TRP dimension, or a combination of at least two of the frequency domain dimension, the time dimension, and the TRP dimension.

When the preset rule is a rule of frequency domain dimension, the preset rule may be that the indexes of the frequency domain units in the K first DCIs are sorted in an ascending or descending manner. The frequency domain unit may be a cell, a carrier (carrier), or a bandwidth part (BWP), which is not limited in this application.

When the preset rule is a rule of a time dimension, the preset rule may be that indexes of time units in the K first DCIs are sorted in an ascending or descending manner. The ascending order of the time cell indices may also be understood as the chronological order from the front to the back, and the descending order of the time cell indices may also be understood as the chronological order from the back to the front. The time unit may be a system frame, a subframe, a time slot, or an OFDM symbol, which is not limited in this application. Or, the preset rule may be that the K first DCIs are sorted in ascending order or descending order of DCI detection time. The ascending order of the DCI detection time points may be understood as the time sequence from the front to the back, and the descending order of the DCI detection time points may be understood as the time sequence from the back to the front.

When the preset rule is a rule of TRP dimension, the preset rule may be that the time-frequency resource set pool indexes in the K first DCIs are sorted in ascending order or descending order.

The preset rule may be any one of, for example, any one of the three manners, or may also be multiple, and further optionally, when the preset rule is multiple, the multiple preset rules may be a combination of at least two of the three manners.

For example, the preset rule may be in time dimension, for example, as shown in fig. 7, the cell index of cell 1 is 1,K is five. A terminal device located in cell 1 receives five DCIs at five different times. The five first DCIs are sequenced according to time sequence and then are: DCI1, DCI2, DCI3, DCI4, and DCI5. The time here may refer to a time when the network device transmits DCI, or may refer to a time when the terminal device receives DCI, which is not limited herein. Specifically, taking the terminal device receiving DCI as an example, the time here may be a start time of detecting DCI, or an end time of detecting DCI. For another example, when the network device transmits DCI, the time may be a start time of transmitting DCI or an end time of transmitting DCI.

Optionally, in an example of an application scenario, the scenario may be a single TRP and single cell scenario, where all DCI received by the terminal device belong to one cell. The preset rule may not consider the frequency domain dimension.

Example two, the preset rules may be in the time dimension and the frequency domain dimension. For example, as shown in fig. 8, the cell indexes corresponding to the three cells are: 0.1, 2,K is three. It is assumed that a terminal device located in three cells at the same time receives three DCIs located in three cells at the same time. The three first DCIs are sorted according to the ascending order of cell indexes: DCI1, DCI2, DCI3.

For another example, as shown in fig. 9, the cell indexes corresponding to the three cells are: 0.1, 2,K is 9. It is assumed that a terminal device simultaneously located in three cells receives three DCIs located in three cells at each of three time instants.

If the preset rule is that K first DCIs are sorted from first to last according to time, and the cells where the DCIs at the same time are sorted according to the ascending mode of cell indexes, the final sorting of the 9 DCIs: DCI1, DCI2, DCI3, DCI4, DCI5, DCI 6, DCI7, DCI8, and DCI9, and the target DCI is DCI1.

If the preset rule is that the K first DCIs are sorted according to the ascending mode of the cell index, and the time of the DCIs of the same cell is sorted from first to last, then the final sorting of the 9 DCIs is: DCI1, DCI4, DCI7, DCI2, DCI5, DCI8, DCI3, DCI 6, DCI9, the target DCI being DCI9.

Example three: in a multi-TRP scenario, since there is more than one TRP, each TRP in the multiple TRPs corresponds to an identifier, which may be a time-frequency resource pool index, for distinguishing different TRPs. In this case, the preset rule may be that the K first DCIs are sorted according to the time dimension and the frequency domain dimension, and the DCIs of the same cell at the same time are sorted in an ascending order or a descending order according to the time-frequency resource set pool index. Or, the preset rule may be that the K first DCIs are sorted in ascending order or descending order according to the time-frequency resource set pool index, and the DCIs corresponding to the same time-frequency resource set pool index are sorted according to the time dimension and the frequency domain dimension.

For example, as shown in fig. 10, the cell indexes corresponding to three cells are: 0.1, 2,K is 4. It is assumed that a terminal device located in three cells at the same time receives four DCIs located in three cells at the same time. The terminal device receives two DCIs, namely DCI1 and DCI4, located in a cell with a cell index of 0 at the same time. The two DCIs are from two TRPs and respectively correspond to a time frequency resource set pool index 0 and a time frequency resource set pool index 1, and the DCI1, the DCI2 and the DCI3 are assumed to correspond to the same TRP.

If the preset rule is that K first DCIs are sorted according to time dimension and frequency dimension, the DCIs of the same cell at the same time are sorted according to ascending order of time-frequency resource set pool index, and if the sorting according to time dimension and frequency dimension is that the sorting is from first to last according to time, the cell where the DCI at the same time is located is sorted according to ascending order of cell index, then the final sorting result of the 4 DCIs is: DCI1, DCI4, DCI2, and DCI3, and the target DCI is DCI1.

It should be noted that, after the K first DCIs are sequenced, priorities of the K first information may be determined. For example, the earlier the time, the higher the priority. Alternatively, the smaller the index of the cell, the higher the priority. Or, the smaller the index of the time-frequency resource set pool is, the higher the priority is.

In one implementation, when the associated information is the first PDSCH, K is greater than 1, and the first PDSCH is dynamically scheduled, the terminal device may determine the priority of the K first information according to the order of the K first PDSCHs. The order of the K first PDSCHs may be the same as the order of the K first DCIs corresponding to the K first PDSCHs, and the order of the K first DCIs may refer to the above description and is not described herein again. Optionally, the order of the K first PDSCHs may be an ascending order or a descending order of indexes of a cell where the first PDSCH is located, where the smaller the index of the cell is, the higher the priority of the first information is, or the larger the index of the cell is, the higher the priority of the first information is. Optionally, the order of the K first PDSCHs may be obtained according to target BLERs associated with the first PDSCHs, and the smaller the associated target BLERs are, the higher the priority of the first PDSCHs is.For example, the target BLER is 10 ^-5 Priority of associated first PDSCH is 10 above target BLER ^-1 A priority of the associated first PDSCH. Optionally, the target BLER associated with the first PDSCH may be determined by an MCS table employed by the first PCSH, or determined according to a CQI table corresponding to the table employed by the first PDSCH, or determined when quantizing the second information.

In one implementation, when the associated information is the first PDSCH and K is greater than 1, the terminal device may determine priorities of K pieces of first information according to the K pieces of first PDSCH. Optionally, the priority of the K first information is determined by sorting the K first PDSCHs in a time-wise order or a time-wise order, for example, the earlier the time, the higher the priority of the first information is, or the later the time, the higher the priority of the first information is. The time here may refer to a time when the network device transmits the first PDSCH, or may refer to a time when the terminal device receives the first PDSCH, which is not limited herein. Specifically, taking the terminal device receiving the first PDSCH as an example, the time here may be the starting time of detecting the PDSCH, or the ending time of detecting the PDSCH. For another example, the time for transmitting the PDSCH by the network device may be the starting time of transmitting the PDSCH or the ending time of transmitting the PDSCH. Optionally, in the case that the K first PDSCHs are semi-persistent scheduled, the priorities of the K first information are determined by indexes of semi-persistent configurations associated with the K first PDSCHs. For example, the higher the priority of the first information is, the smaller the index of the associated semi-static configuration is, or the higher the index of the associated semi-static configuration is, the higher the priority of the first information is. Optionally, the priority of the K first information is determined by indexes of cells in which the K first PDSCHs are located. For the sequencing of the cells where the K first PDSCHs are located, reference may be made to the description of the foregoing embodiments, and details are not described herein again. For example, the smaller the index of the cell, the higher the priority of the first information, or the larger the index of the cell, the higher the priority of the first information.

Mode 5, the priority of each first information is determined using the following formula (5).

Priority = A X Y + B X K + C + s (5)

Wherein A is determined by the number of cells and/or the total number of configured CSI-RS reports. Y is used for describing the type of CSI, and Y of one CSI type corresponds to one value. For example, Y may be determined according to the prioritization in mode 1. For example, for the first ordering of first CSI > a-CSI > SP-CSI on PUSCH > SP-CSI on PUCCH > P-CSI on PUCCH, the y value of first CSI is smaller than the y value corresponding to a-CSI is smaller than the y value corresponding to SP-CSI on PUSCH is smaller than the y value corresponding to SP-CSI on PUCCH is smaller than the y value corresponding to P-CSI on PUCCH. For several other orderings the y-value can be determined with reference to the above example. Optionally, for the first priority ordering, the first CSI > a-CSI > SP-CSI on PUSCH > SP-CSI on PUCCH > P-CSI on PUCCH, the y value corresponding to the first CSI may be 0 or-1, and then the y value is added by 1 for each lower priority level. If the priority of two first messages is the same, the two first messages adopt the same y value.

B is determined according to the number of cells and/or the number of configured CSI-reports. K is used for describing whether the load is L1-RSPR or L1-SINR, and can be specifically introduced by referring to a priority formula in related elements. C is determined according to the total number of CSI-reports, and C denotes a cell index. s represents a CSI-Report ID, which may optionally be determined in combination with mode 3 above. Alternatively, s may be determined in combination with the above-described mode 4, and the higher the priority of the first information, the smaller s. The highest priority s may be 0 or-1, with s being incremented by 1 each lower level of priority. With reference to the above-mentioned mode 8978, the smaller the zxft 8978 is, the higher the priority of the first information is, and the first information with high priority may be the first information corresponding to the first PDSCH in the front time or the first information corresponding to the first DCI in the front time or the rear time.

In one implementation, after the priorities of the N fifth information are determined, M pieces of target information may be determined from the N fifth information. When the M pieces of target information are transmitted through the uplink channel, the relationship between the total bit number of the M pieces of target information and the total bit data of the N pieces of fifth information and the maximum carrying bit number of the uplink channel may have various relationships.

Optionally, the total bit number of the N fifth information is greater than the maximum bearer bit number of the uplink channel, the total bit number of the M target information is less than or equal to the maximum bearer bit number, and the uplink channel is used for carrying the M target information. For example, when the time-frequency resources of the uplink channel are not enough to transmit the N fifth information, the M pieces of target information are determined from the N fifth information, and at this time, the time-frequency resources are enough to transmit the M pieces of target information. For example, N is 5,M may be 3, 2, or 1.

Optionally, the total bit number of the N fifth information is less than or equal to the maximum carrying bit number of the uplink channel, and the uplink channel is used for carrying the M target information. The M = N.

Optionally, the total bit number of the M +1 pieces of fifth information is greater than the maximum bearer bit number of the uplink channel, the total bit number of the M pieces of target information is less than or equal to the maximum bearer bit number, and the uplink channel is used for carrying the M pieces of target information. For example, if N is 5, M =1 is 4, then M may only be 3.

Optionally, the terminal device may further send uplink information to the network device. For example, when the time frequency resources for transmitting the N fifth information and the time frequency resources for transmitting the uplink information overlap, the information to be transmitted preferentially is determined according to the priority. For example, if the priority of the fifth information is higher than that of the uplink information, at this time, N pieces of fifth information are transmitted. Otherwise, the uplink information and/or the M pieces of target information are transmitted. The overlapping of the time-frequency resources may refer to overlapping of time-domain resources, overlapping of frequency-domain resources, or overlapping of both time-domain and frequency-domain resources. Optionally, the time domain resource overlapping means that at least one symbol of the time frequency resources corresponding to the N fifth information and the time frequency resources corresponding to the uplink information is the same. Optionally, the frequency domain resource overlapping means that at least one same subcarrier is present in the time frequency resources corresponding to the N fifth information and the time frequency resources corresponding to the uplink information.

For example, assuming that the priority of the uplink information is higher than that of the fifth information, the following condition is satisfied: the total bit number of the N pieces of fifth information and the uplink information is greater than the maximum bearing bit number of the uplink channel, the total bit number of the M pieces of target information and the uplink information is less than or equal to the maximum bearing bit number, and the uplink channel is used for bearing the M pieces of target information and the uplink information.

For example, assuming that the priority of the uplink information is higher than that of the fifth information, the uplink channel is used to carry the uplink information.

Optionally, the terminal device may also send uplink information to the network device. For example, when the time frequency resources for transmitting the N fifth information and the time frequency resources for transmitting the uplink information overlap, the information to be transmitted preferentially is determined according to the priority. For example, if the priority of the fifth information is the same as the priority of the upstream information. At this time, the uplink information and the M pieces of target information are transmitted. The overlapping of the time-frequency resources may refer to overlapping of time-domain resources, overlapping of frequency-domain resources, or overlapping of both time-domain and frequency-domain resources. Optionally, the time domain resource overlapping means that at least one symbol of the time frequency resources corresponding to the N fifth information and the time frequency resources corresponding to the uplink information is the same. Optionally, the frequency domain resource overlapping means that at least one same subcarrier is present in the time frequency resources corresponding to the N fifth information and the time frequency resources corresponding to the uplink information.

Optionally, the total bit number of the N fifth information and the uplink information is greater than or equal to the maximum bearer bit number of the uplink channel, the total bit number of the M target information and the uplink information is less than or equal to the maximum bearer bit number, and the uplink channel is used for carrying the M target information and the uplink information. For example, when M is equal to N, the above relationship is satisfied.

Optionally, the total bit number of the M +1 pieces of fifth information and the uplink information is greater than the maximum bearer bit number of the uplink channel, and the total bit number of the M pieces of target information and the uplink information is less than or equal to the maximum bearer bit number.

It should be noted that, in the embodiment of the present application, the uplink information includes at least one of the following: and (4) uplink data. And (4) uplink control information. The uplink control information may be at least one of a hybrid automatic repeat request (HARQ), a Scheduling Request (SR), and the like. HARQ is ACK/NACK in the embodiment of fig. 5.

In addition, the maximum bearer bit number of the uplink channel is determined according to at least one of the following: the code rate of the maximum bearing information supported by the uplink channel, the time domain resource occupied by the uplink channel, the frequency domain resource occupied by the uplink channel, the format of the uplink channel, and the modulation mode adopted by the uplink channel for transmitting the uplink data.

For example, if the uplink channel is an uplink data channel PUSCH, the maximum bearer bit number is: x Q _m X r x v. Where X is determined according to the number of (REs) available for transmitting data in the PUSCH. Qm is a modulation order used for PUSCH transmission, and the modulation order is determined by a modulation scheme (for example, qm =2 when the modulation scheme is QPSK). r is the code rate adopted when the information is transmitted by the PUSCH, and v is the number of layers of the PUSCH transmission data. Optionally, one RE is one symbol in the time domain and one subcarrier in the frequency domain.

For another example, if the uplink channel is the uplink control channel PUCCH, the maximum number of bearer bits is 2 when the PUCCH format is PUCCH format 0 or PUCCH format 1. When the format of the PUCCH is other formats, such as format 2, format 3, format 4, etc., the maximum number of bearer bits is: x Q _m X r x v. Wherein, X is determined according to RE available for information transmission in PUCCH, qm is a modulation order used for PUCCH transmission, the modulation order is determined by a modulation method, r is a code rate used when PUCCH transmits information, and v is the number of layers of PUCCH transmission information.

603. The terminal device sends M pieces of target information to the network device, and correspondingly, the network device receives the M pieces of target information from the terminal device.

When the time-frequency resources for transmitting the N fifth information are limited, or the time-frequency resources for transmitting the N fifth information and the time-frequency resources for transmitting the uplink information are overlapped (for example, the priority of the uplink information is higher), the M pieces of target information with higher priority are determined from the N fifth information, and the M pieces of target information are preferentially sent. This is advantageous for improving the performance of the communication system.

The scheme provided by the embodiment of the application is mainly introduced from the perspective of a method. In order to implement the above functions, it includes a hardware structure and/or a software module for performing each function. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

As shown in fig. 11, for a schematic structural diagram of a communication apparatus 110 provided in this embodiment of the application, the communication apparatus 110 may be a terminal device, or a CPU in the terminal device, or a control module in the terminal device, or a client in the terminal device. The communication device 110 is configured to perform the communication method shown in fig. 5. The communication device 110 may include a receiving unit 1101 and a determining unit 1102.

A receiving unit 1101, configured to receive a first physical downlink shared channel PDSCH from a network device. A determining unit 1102 configured to determine first information according to the first PDSCH received by the receiving unit 1101, where the first information includes second information, and the second information is determined according to third information.

Optionally, the third information includes at least one of the following six items: a size of a target data packet, a target block error rate BLER, a target signal to interference and noise ratio SINR, a target redundancy version RV, a first precoding matrix, a rank, at least one of the six items being associated with the first PDSCH.

Optionally, the associating the size of the target data packet with the first PDSCH includes: the size of the target data packet is determined according to a first time unit, wherein the first time unit is a time unit for receiving the first PDSCH or a time unit for receiving first indication information corresponding to the first PDSCH; or, the size of the target data packet is obtained according to the size of the first data packet carried by the first PDSCH.

Optionally, the target BLER is associated with the first PDSCH, and includes: the target BLER is determined according to a first Modulation and Coding Scheme (MCS) corresponding to the first PDSCH.

Optionally, the associating the target SINR with the first PDSCH includes: the target SINR is determined from the first precoding matrix associated with the first PDSCH.

Optionally, the associating a first precoding matrix with the first PDSCH includes: the first precoding matrix is obtained according to the data information of the first PDSCH or according to a demodulation reference signal (DMRS) corresponding to the first PDSCH; or the first precoding matrix is determined according to a channel state information reference signal (CSI-RS), and the CSI-RS is associated with the first PDSCH.

Optionally, associating the CSI-RS with the first PDSCH includes: the CSI-RS is associated with the first PDSCH through a CSI-RS reporting configuration identifier or a CSI-RS resource configuration identifier; or the CSI-RS corresponds to CSI reporting information, wherein the CSI reporting information is the CSI reporting information which is nearest to the first PDSCH and is earlier in time than the time of receiving the first PDSCH; or the CSI-RS resource is the CSI-RS resource which is closest to the first PDSCH and the time of receiving the first PDSCH is earlier than the time of receiving the first PDSCH; or, the CSI-RS and the first PDSCH or a first indication information quasi-co-located QCL corresponding to the first PDSCH; or the CSI-RS is associated with the first PDSCH or quasi co-location information of the first indication information corresponding to the first PDSCH.

Optionally, as shown in fig. 11, the communication device 110 may further include a sending unit 1103. The sending unit 1103 is configured to send the first information to a network device.

Optionally, the second information is measurement information or offset information, and the offset information is determined according to the first reference value and the measurement information.

Optionally, the sending unit is configured to send feedback information to the network device, where the feedback information is Acknowledgement (ACK) information or Negative Acknowledgement (NACK) information, the ACK information is used to indicate that the decoding of the first PDSCH is successful, and the NACK information is used to indicate that the decoding of the first PDSCH is failed; wherein the first information and the feedback information are transmitted in the same resource or different resources.

Optionally, the receiving unit 1101 is further configured to receive fourth information from a network device, where the fourth information is used to enable the terminal device to determine the first information.

Of course, the communication device 110 provided in the embodiment of the present application includes, but is not limited to, the above modules.

In practical implementation, the determining unit 1102 may be implemented by a processor of the communication device shown in fig. 4. The transmitting unit 1103 and the receiving unit 1101 may be implemented by communication interfaces of the communication apparatus shown in fig. 4. The specific implementation process may refer to the description of the communication method portion shown in fig. 5, and is not described here again.

As shown in fig. 12, which is a schematic structural diagram of another communication apparatus 120 provided in this embodiment of the present application, the communication apparatus 120 may be a terminal device, or a CPU in the terminal device, or a control module in the terminal device, or a client in the terminal device. The communication device 120 is configured to perform the communication method shown in fig. 6. The communication apparatus 120 may include a determination unit 1201 and a transmission unit 1202.

A determining unit 1201, configured to determine N fifth information, where the N fifth information includes K first information, and the first information is determined according to the first PDSCH; and determines M pieces of object information according to the priorities of the N pieces of fifth information, and a sending unit 1202 is configured to send the M pieces of object information to the network device. Wherein N, K and M are positive integers, K is less than or equal to N, and M is less than or equal to N.

Optionally, the priority of the N fifth information is determined according to the type corresponding to each fifth information.

Optionally, the priority of the K pieces of first information is determined according to an index of a cell corresponding to each piece of first information, and the index of the cell is determined according to a cell where the first PDSCH corresponding to the first information is located.

Optionally, the priority of the K pieces of first information is determined according to a CSI-RS reporting configuration identifier associated with each piece of first information.

Optionally, the priority of the K pieces of first information is determined according to the associated information corresponding to each piece of first information.

Optionally, if the cell where the first PDSCH is located includes a first cell, the index of the cell is the index of the first cell; if the cell where the first PDSCH is located comprises a plurality of first cells, the index of the cell is a preset value.

Optionally, the association information includes at least one of the following: first Downlink Control Information (DCI), and a first PDSCH, where the first DCI is used to schedule the first PDSCH.

Optionally, the association information includes a first DCI, and the priority of the K pieces of first information is determined according to the association information corresponding to each piece of first information, where the priority includes: the priorities of the K first information are determined according to the order of the K first DCIs.

Optionally, the associated information includes a first PDSCH, and the priority of the K pieces of first information is determined according to the associated information corresponding to each piece of first information, including: the priorities of the K first information are determined according to the order of the K first PDSCHs.

Optionally, the M pieces of target information are M pieces of information with a higher priority in the N pieces of fifth information.

Optionally, the total bit number of the N fifth information is greater than the maximum bearer bit number of the uplink channel, the total bit number of the M target information is less than or equal to the maximum bearer bit number, and the uplink channel is used for carrying the M target information.

Optionally, the sending unit 1202 is further configured to send uplink information to the network device; the total bit number of the N fifth information and the uplink information is greater than the maximum carrying bit number of the uplink channel, the total bit number of the M target information and the uplink information is less than or equal to the maximum carrying bit number, and the uplink channel is used for carrying the M target information and the uplink information.

Optionally, the row information includes at least one of: uplink data and uplink control information.

Optionally, the maximum number of bearer bits is determined according to at least one of the following: the code rate of the maximum bearing information supported by the uplink channel, the time domain resource occupied by the uplink channel, the frequency domain resource occupied by the uplink channel, the format of the uplink channel, and the modulation mode adopted by the uplink channel for transmitting the uplink data.

Of course, the communication device 120 provided in the embodiment of the present application includes, but is not limited to, the above modules.

In practical implementation, the determining unit 1201 may be implemented by a processor of the communication apparatus shown in fig. 4. The transmitting unit 1202 may be implemented by a communication interface of the communication apparatus shown in fig. 4. The specific implementation process may refer to the description of the communication method portion shown in fig. 6, and is not described here again.

Another embodiment of the present application further provides a computer-readable storage medium, where a computer instruction is stored in the computer-readable storage medium, and when the computer instruction is executed on a terminal device, the terminal device is caused to perform each step performed by the terminal device in the method flow shown in the foregoing method embodiment.

Another embodiment of the present application further provides a chip system, and the chip system is applied to a terminal device. The chip system includes one or more interface circuits, and one or more processors. The interface circuit and the processor are interconnected by wires. The interface circuit is configured to receive signals from the memory of the terminal device and to send signals to the processor, the signals including computer instructions stored in the memory. When the processor executes the computer instructions, the terminal device performs the steps performed by the terminal device in the method flow shown in the above-described method embodiment.

In another embodiment of the present application, a computer program product is also provided, where the computer program product includes computer instructions that, when executed on a terminal device, cause the terminal device to perform the steps performed by the terminal device in the method flow shown in the foregoing method embodiment.

As shown in fig. 13, which is a schematic structural diagram of a communication apparatus 130 provided in this embodiment of the present application, the communication apparatus 130 may be a network device, or a CPU in the network device, or a control module in the network device, or a client in the network device. The communication device 130 is configured to perform the communication method shown in fig. 5. The communication apparatus 130 may include a transmitting unit 1301 and a receiving unit 1302.

A sending unit 1301, configured to send a first physical downlink shared channel PDSCH to a terminal device, where the first PDSCH is used to determine first information, the first information includes second information, and the second information is determined according to third information;

a receiving unit 1302, configured to receive first information from the terminal device.

Optionally, the receiving unit 1302 is further configured to receive feedback information from the terminal device, where the feedback information is Acknowledgement (ACK) information or Negative Acknowledgement (NACK) information, the ACK information is used to indicate that the decoding of the first PDSCH is successful, and the NACK information is used to indicate that the decoding of the first PDSCH is failed;

wherein the first information and the feedback information are received in a same resource or different resources.

Optionally, the sending unit 1301 is further configured to send fourth information to the terminal device, where the fourth information is used to enable the terminal device to determine the first information.

Optionally, the method for associating the first DCI set and the first PDSCH set may include: the ACK feedback information or NACK feedback information corresponding to at least two PDSCHs in the first PDSCH set is located on one time unit. The ACK feedback information is used for indicating the decoding success of the corresponding PDSCH, and the NACK feedback information is used for indicating the decoding failure of the corresponding PDSCH; the DCI scheduling the PDSCH in the first set of PDSCHs belongs to the first DCI set, or the DCI scheduled PDSCH in the first DCI set belongs to the first set of PDSCHs.

Optionally, the target DCI is used to indicate at least one of: the target PDSCH and the target cell, wherein the target cell is the cell where the target PDSCH is located.

Optionally, the target DCI is used to indicate a target PDSCH, where the target PDSCH is one or more PDSCHs in the first PDSCH set.

Optionally, the method for indicating the target PDSCH by using the target DCI may include: the target DCI is used for indicating the position of the target PDSCH in the first PDSCH set, and the PDSCHs in the first PDSCH set are sequenced according to a preset rule.

Optionally, the target PDSCH is an nth PDSCH in the first PDSCH set, which is sequenced according to a preset rule, and the nth is a positive sequence or a reverse sequence.

Optionally, the target DCI is used to indicate the target cell, and the target PDSCH is one or more PDSCHs located in the target cell in the first PDSCH set.

Of course, the communication device 130 provided in the embodiment of the present application includes, but is not limited to, the above modules.

In practical implementation, the sending unit 1301 and the receiving unit 1302 may be implemented by a communication interface of a communication apparatus shown in fig. 4. The specific implementation process may refer to the description of the communication method portion shown in fig. 5, and is not described here again.

As shown in fig. 14, which is a schematic structural diagram of a communication device 140 provided in this embodiment of the present application, the communication device 140 may be a network device, or a CPU in the network device, or a control module in the network device, or a client in the network device. The communication device 140 is used to perform the communication method shown in fig. 6. The communication apparatus 140 may include a transmitting unit 1401 and a receiving unit 1402.

A sending unit 1401, configured to send a first PDSCH to the terminal device, where the first PDSCH is used to determine the first information. A receiving unit 1402, configured to receive M pieces of target information from the terminal device, where the M pieces of target information are determined from N pieces of fifth information according to priorities of the N pieces of fifth information, and the N pieces of fifth information include K pieces of first information, where N, K and M are positive integers, K is less than or equal to N, and M is less than or equal to N.

Optionally, the priority of the N fifth information is determined according to a type corresponding to each fifth information.

Optionally, if the cell where the first PDSCH is located includes a first cell, the index of the cell is the index of the first cell; if the cell where the first PDSCH is located includes a plurality of first cells, the index of the cell is a preset value.

Optionally, the association information includes at least one of the following: the first DCI is used for scheduling the first PDSCH.

Of course, the communication device 140 provided in the embodiments of the present application includes, but is not limited to, the above modules.

Another embodiment of the present application further provides a computer-readable storage medium, in which computer instructions are stored, and when the computer instructions are executed on a network device, the network device executes each step executed by the network device in the method flow shown in the foregoing method embodiment.

Another embodiment of the present application further provides a chip system, and the chip system is applied to a network device. The chip system includes one or more interface circuits, and one or more processors. The interface circuit and the processor are interconnected by a line. The interface circuit is configured to receive signals from the memory of the network device and to send signals to the processor, the signals including computer instructions stored in the memory. When the processor executes the computer instructions, the network device performs the steps performed by the network device in the method flow illustrated in the above-described method embodiments.

In another embodiment of the present application, a computer program product is further provided, where the computer program product includes computer instructions that, when executed on a network device, cause the network device to perform the steps performed by the network device in the method flows shown in the foregoing method embodiments.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The processes or functions according to the embodiments of the present application are generated in whole or in part when the computer-executable instructions are loaded and 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 via wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. Computer-readable storage media can be any available media that can be accessed by a computer or can comprise one or more data storage devices, such as servers, data centers, and the like, that can be integrated with the media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

The foregoing is only illustrative of the present application. Those skilled in the art can conceive of changes or substitutions based on the specific embodiments provided in the present application, and all such changes or substitutions are intended to be included within the scope of the present application.

Claims

1. A communication method is applied to a terminal device, and is characterized by comprising the following steps:

receiving a first Physical Downlink Shared Channel (PDSCH) from network equipment;

determining first information from the first PDSCH, the first information comprising second information, the second information determined from third information.

2. The communication method according to claim 1,

the third information includes at least one of the following six items: a size of a target data packet, a target block error rate BLER, a target signal to interference and noise ratio SINR, a target redundancy version RV, a first precoding matrix, a rank, at least one of the six items being associated with the first PDSCH.

3. The communication method of claim 2, wherein the size of the target packet is associated with the first PDSCH, and wherein the step of determining the size of the target packet comprises:

the size of the target data packet is determined according to a first time unit, where the first time unit is a time unit for receiving the first PDSCH or a time unit for receiving first indication information corresponding to the first PDSCH;

alternatively, the first and second electrodes may be,

the size of the target data packet is obtained according to the size of the first data packet carried by the first PDSCH.

4. The communication method according to claim 2 or 3, wherein the target BLER is associated with the first PDSCH, comprising:

the target BLER is determined according to a first Modulation and Coding Scheme (MCS) corresponding to the first PDSCH.

5. The communication method according to any one of claims 2 to 4, wherein the target S1NR is associated with the first PDSCH, and comprises:

the target S1NR is determined from the first precoding matrix associated with the first PDSCH.

6. The communication method according to any of claims 2-5, wherein the first precoding matrix is associated with the first PDSCH and comprises:

the first precoding matrix is obtained according to the data information of the first PDSCH or according to a demodulation reference signal (DMRS) corresponding to the first PDSCH;

alternatively, the first and second electrodes may be,

the first precoding matrix is determined from a channel state information reference signal, CSI-RS, associated with the first PDSCH.

7. The communication method according to claim 6, wherein the association of the CSI-RS and the first PDSCH comprises:

the CSI-RS is associated with the first PDSCH through a CSI-RS reporting configuration identifier or a CSI-RS resource configuration identifier;

alternatively, the first and second electrodes may be,

the CSI-RS corresponds to CSI reporting information, and the CSI reporting information is nearest to the first PDSCH and is earlier in time than the time of receiving the first PDSCH;

alternatively, the first and second electrodes may be,

the CSI-RS resource is closest to the first PDSCH and is earlier in time than the time of receiving the first PDSCH;

alternatively, the first and second electrodes may be,

the CSI-RS and the first PDSCH or first indication information quasi-co-located QCL corresponding to the first PDSCH;

alternatively, the first and second electrodes may be,

the CSI-RS is associated with the first PDSCH or quasi-co-location information of first indication information corresponding to the first PDSCH.

8. The communication method according to any one of claims 1 to 7, characterized in that the communication method further comprises:

and sending the first information to a network device.

9. The communication method according to any one of claims 1 to 8, wherein the second information is measurement information or offset information, and the offset information is determined based on a first reference value and the measurement information.

10. The communication method according to any one of claims 1 to 9, characterized in that the communication method further comprises:

sending feedback information to the network equipment, wherein the feedback information is Acknowledgement (ACK) information or Negative Acknowledgement (NACK) information, the ACK information is used for indicating that the decoding of the first PDSCH is successful, and the NACK information is used for indicating that the decoding of the first PDSCH is failed;

wherein the first information and the feedback information are transmitted in the same resource or different resources.

11. The communication method according to any one of claims 1 to 10, further comprising:

and receiving fourth information from the network equipment, wherein the fourth information is used for enabling the terminal equipment to determine the first information.

12. A communication method applied to a network device is characterized by comprising the following steps:

sending a first Physical Downlink Shared Channel (PDSCH) to terminal equipment, wherein the first PDSCH is used for determining first information, the first information comprises second information, and the second information is determined according to third information;

first information from the terminal device is received.

13. The communication method according to claim 12, further comprising:

receiving feedback information from the terminal equipment, wherein the feedback information is Acknowledgement (ACK) information or Negative Acknowledgement (NACK) information, the ACK information is used for indicating that the decoding of the first PDSCH is successful, and the NACK information is used for indicating that the decoding of the first PDSCH is failed;

wherein the first information and the feedback information are received in the same resource or different resources.

14. The communication method according to claim 12 or 13, characterized in that the communication method further comprises:

and sending fourth information to the terminal equipment, wherein the fourth information is used for enabling the terminal equipment to determine the first information.

15. A communication apparatus located in a terminal device, comprising:

a receiving unit, configured to receive a first physical downlink shared channel PDSCH from a network device;

a determining unit, configured to determine first information according to the first PDSCH received by the receiving unit, where the first information includes second information, and the second information is determined according to third information.

16. The communication device of claim 15,

17. The communications apparatus of claim 16, wherein the target packet size is associated with the first PDSCH, comprising:

alternatively, the first and second electrodes may be,

18. The communications apparatus of claim 16 or 17, wherein the target BLER is associated with the first PDSCH, comprising:

19. The communications apparatus of any of claims 16-18, wherein the target SINR is associated with the first PDSCH, comprising:

20. The communications apparatus of any of claims 16-19, wherein the first precoding matrix is associated with the first PDSCH and comprises:

alternatively, the first and second electrodes may be,

21. The communications apparatus of claim 20, wherein the CSI-RS is associated with the first PDSCH, comprising:

alternatively, the first and second electrodes may be,

alternatively, the first and second liquid crystal display panels may be,

a first indication information quasi-co-located QCL corresponding to the CSI-RS and the first PDSCH or the first PDSCH;

alternatively, the first and second electrodes may be,

22. A communication apparatus according to any of claims 15-21, further comprising: a transmitting unit;

the sending unit is configured to send the first information to a network device.

23. A communication apparatus according to any of claims 15-22, wherein the second information is measurement information or offset information, the offset information being determined based on a first reference value and the measurement information.

24. A communication device according to any of claims 15-23, wherein the communication device further comprises: a transmitting unit;

the sending unit is configured to send feedback information to the network device, where the feedback information is Acknowledgement (ACK) information or Negative Acknowledgement (NACK) information, the ACK information is used to indicate that the decoding of the first PDSCH is successful, and the NACK information is used to indicate that the decoding of the first PDSCH is failed;

25. The communication device according to any of claims 15-24,

the receiving unit is further configured to receive fourth information from a network device, where the fourth information is used to enable the terminal device to determine the first information.

26. A communications apparatus, located in a network device, comprising:

a sending unit, configured to send a first physical downlink shared channel PDSCH to a terminal device, where the first PDSCH is used to determine first information, the first information includes second information, and the second information is determined according to third information;

and the receiving unit is used for receiving the first information from the terminal equipment.

27. The communication device of claim 26,

the receiving unit is further configured to receive feedback information from the terminal device, where the feedback information is Acknowledgement (ACK) information or Negative Acknowledgement (NACK) information, the ACK information is used to indicate that the decoding of the first PDSCH is successful, and the NACK information is used to indicate that the decoding of the first PDSCH is failed;

28. The communication device according to claim 26 or 27,

the sending unit is further configured to send fourth information to the terminal device, where the fourth information is used to enable the terminal device to determine the first information.

29. A communication device, comprising a memory and a processor; the memory and the processor are coupled; the memory for storing computer program code, the computer program code comprising computer instructions; the communication device, when executing the computer instructions, performs the communication method according to any one of claims 1-11 or performs the communication method according to any one of claims 12-14.

30. A computer-readable storage medium comprising computer instructions which, when run on a communication apparatus, cause the communication apparatus to perform the communication method of any one of claims 1-11 or perform the communication method of any one of claims 12-14.