CN116508277A

CN116508277A - Method and device for indicating feedback information

Info

Publication number: CN116508277A
Application number: CN202180065716.8A
Authority: CN
Inventors: 苏桐; 官磊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-10-16
Filing date: 2021-08-27
Publication date: 2023-07-28
Also published as: WO2022078082A1; WO2022077522A1

Abstract

The application provides a method and a device for indicating feedback information, wherein the method comprises the following steps: the method comprises the steps that a terminal device receives Downlink Control Information (DCI), wherein the DCI is scrambled by a group radio network temporary identifier (G-RNTI), the DCI is used for scheduling a Physical Downlink Shared Channel (PDSCH), and the DCI comprises first indication information; the terminal equipment determines not to send the HARQ-ACK information according to the first preset condition; the first preset condition includes that the first indication information takes a first preset value, and the HARQ-ACK information is used for indicating a receiving state of the PDSCH. The method for indicating feedback information can reduce the uplink resources occupied by HARQ feedback under multicast scheduling and increase the flexibility of the feedback of the multicast HARQ.

Description

Method and device for indicating feedback information

The present application claims priority from PCT application filed by chinese patent office, application number PCT/CN2020/121707, entitled "a method and apparatus for indicating feedback information," at 16, 10/2020, the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to the field of communications, and more particularly, to a method and apparatus for indicating feedback information in the field of communications.

Background

The fifth generation (the fifth generation, 5G) mobile communication system is dedicated to support higher system performance, and the downlink transmission of the 5G New Radio (NR) supports the physical downlink shared channel (physical downlink shared channel, PDSCH). For downlink data transmission, hybrid automatic repeat request (hybrid automatic repeat request, HARQ) is an efficient transmission mechanism. On one hand, the reliability of downlink data transmission can be greatly improved through an HARQ mechanism, and on the other hand, the data transmission efficiency is improved.

At present, in NR, HARQ mechanism is adopted for unicast, so as to ensure the reliability of transmission. Taking downlink data transmission as an example, after receiving PDSCH, a User Equipment (UE) feeds back Acknowledgement (ACK) information on a physical uplink control channel (physical uplink control channel, PUCCH) if the reception is correct, and feeds back negative acknowledgement (negative acknowledge, NACK) information on the PUCCH if the reception is incorrect. The time domain position of the PUCCH where the feedback information is located is indicated by downlink control information (downlink control information, DCI). When the UE transmits HARQ-ACK information on the PUCCH, the UE needs to first acknowledge a PUCCH resource set containing a plurality of PUCCH resources, and acknowledge one PUCCH resource in the resource set to perform transmission of HARQ-ACK information.

And introducing an HARQ feedback mechanism in NR multicast, and the base station can grasp the receiving condition of multicast scheduling data through feedback information of a user, so that the transmission reliability of a communication system is improved. However, when the number of users for multicast scheduling is large, each UE performs HARQ feedback on the PUCCH resource, which occupies many uplink resources.

Therefore, for NR multicast, reducing the HARQ feedback occupation of uplink resources is a problem to be solved.

Disclosure of Invention

In view of this, the present application provides a method and apparatus for indicating feedback information, which may explicitly or implicitly indicate that a terminal device does not send hybrid automatic repeat request HARQ-ACK information, thereby reducing uplink resources occupied by HARQ feedback under multicast scheduling and increasing flexibility of multicast HARQ feedback.

In a first aspect, a method for indicating feedback information is provided, where an execution body of the method may be either a terminal device or a chip applied to the terminal device, taking the execution body as an example of the terminal device, and the method includes: the terminal equipment receives downlink control information DCI from the network equipment, the DCI is scrambled by a group radio network temporary identifier G-RNTI, the DCI is used for scheduling a physical downlink shared channel PDSCH, and the DCI comprises first indication information. The terminal equipment determines not to send HARQ-ACK information according to the first preset condition; the first preset condition includes that the first indication information takes a first preset value, and the HARQ-ACK information is used for indicating a receiving state of the PDSCH.

In the method for indicating feedback information provided in the first aspect, the terminal device receives DCI from the network device, where the DCI is scrambled by a group radio network temporary identifier G-RNTI and is used for scheduling PDSCH, and the DCI includes the first indication information. And the terminal equipment takes a first preset value according to the first indication information and determines not to send HARQ-ACK information to the network equipment. The uplink resource occupied by the HARQ feedback under the multicast scheduling can be reduced, and the flexibility of the multicast HARQ feedback is increased.

In a possible implementation manner of the first aspect, the first indication information indicates first feedback time information, where the first feedback time information is a number of time units from a time unit where the PDSCH is located to a time unit where the HARQ-ACK information is sent; the terminal device determines not to send the HARQ-ACK information according to the first preset condition, and comprises: and the terminal equipment takes a first preset value according to the first indication information and determines not to send HARQ-ACK information. By adopting the method for indicating feedback information, the uplink resources occupied by HARQ feedback under multicast scheduling can be reduced, and the flexibility of the multicast HARQ feedback is increased.

In a possible implementation manner of the first aspect, the feedback time information set includes first feedback time information, the feedback time information set includes at least one feedback time information, at least one value of the first indication information is associated with at least one feedback time information in the feedback time information set, the terminal device takes a first preset value according to the first indication information, and determining not to send HARQ-ACK information includes: and the terminal equipment determines not to send HARQ-ACK information according to the feedback time information value associated with the first preset value in the feedback time information set as a second preset value. By adopting the method for indicating feedback information, the uplink resources occupied by HARQ feedback under multicast scheduling can be reduced, and the flexibility of the multicast HARQ feedback is increased.

In a possible implementation manner of the first aspect, the first indication information is used for indicating the terminal equipment to send a first resource of HARQ-ACK information, the first resource set includes the first resource, the first resource set includes N resources, where at least one value of the first indication information is associated with at least one resource in the resource set, and N is a positive integer greater than or equal to 1; the terminal device determines not to send the HARQ-ACK information according to the first preset condition, and comprises: and the terminal equipment takes a first preset value according to the first indication information and determines not to send the HARQ-ACK information.

In a possible implementation manner of the first aspect, an mth value of the first indication information is associated with a resource in the resource set, at least 1 resource of which the 1 st value to (M-1) th value of the first indication information is not mapped to the resource in the resource set exists, and M is greater than or equal to 2; the terminal device takes a first preset value according to the first indication information, determines not to send HARQ-ACK information, and comprises: and the terminal equipment determines not to send the HARQ-ACK information according to the resources which are not mapped to the resource set by the first preset value.

In a possible implementation manner of the first aspect, an ith resource in the first resource set is associated with an ith+k value of the first indication information, i < N, k being greater than or equal to 1; the terminal device takes a first preset value according to the first indication information, determines not to send HARQ-ACK information, and comprises: and the terminal equipment determines not to send HARQ-ACK information according to the j th resource associated with the first preset value in the resource set, wherein j is more than or equal to 1 and less than or equal to k, and j and k are positive integers. By adopting the method for indicating feedback information, the uplink resources occupied by HARQ feedback under multicast scheduling can be reduced, and the flexibility of the multicast HARQ feedback is increased.

In a possible implementation manner of the first aspect, the determining, by the terminal device, that HARQ-ACK information is not sent according to the first preset value of the first indication information includes: the first preset value is mapped to resource configuration information corresponding to the first resource, the resource configuration information comprises a first parameter, and the terminal equipment determines not to send HARQ-ACK information according to the first parameter.

In a possible implementation manner of the first aspect, the determining, by the terminal device, that HARQ-ACK information is not transmitted according to the first parameter includes: and the terminal equipment determines not to send the HARQ-ACK information according to the third preset value which is the value of the first parameter.

In a possible implementation manner of the first aspect, the method further includes: the first preset value is mapped to resource configuration information corresponding to the first resource, the resource configuration information does not comprise a first parameter, and the terminal equipment determines not to send HARQ-ACK information according to the fact that the resource configuration information does not comprise the first parameter.

In a possible implementation manner of the first aspect, the method further includes: the terminal device determines an HARQ codebook including a plurality of HARQ-ACK information corresponding to a plurality of PDSCH. When the plurality of HARQ-ACK information are all determined not to be transmitted, the terminal device does not transmit the HARQ codebook; or, when at least one HARQ-ACK information among the plurality of HARQ-ACK information is not determined to be not transmitted, the terminal apparatus transmits the HARQ codebook.

In a second aspect, a method for indicating feedback information is provided, where an execution body of the method may be a network device or a chip applied to the network device, and taking the execution body as the network device as an example, the method includes: the network equipment determines that the terminal equipment does not send HARQ-ACK information, wherein the HARQ-ACK information is used for indicating the receiving state of the PDSCH; the network equipment sends DCI, wherein the DCI is scrambled by a group radio network temporary identifier G-RNTI, the DCI is used for scheduling a PDSCH, and the DCI comprises first indication information; the first indication information takes a first preset value and is used for indicating the network equipment not to receive the HARQ-ACK information.

The method for indicating feedback information provided in the second aspect, wherein the network device determines that the terminal device does not send HARQ-ACK information, where the HARQ-ACK information is used to indicate a reception state of the PDSCH; the network equipment transmits DCI, wherein the DCI is scrambled by G-RNTI, the DCI is used for scheduling PDSCH, and the DCI comprises first indication information; the first indication information takes a first preset value and is used for indicating the network equipment not to receive the HARQ-ACK information. The uplink resource occupied by the HARQ feedback under the multicast scheduling can be reduced, and the flexibility of the multicast HARQ feedback is increased.

In a possible implementation manner of the second aspect, the first indication information indicates first feedback time information, where the first feedback time information is a number of time units from a time unit where the PDSCH is located to a time unit where the HARQ-ACK information is sent, and the first indication information takes a first preset value to indicate that the network device does not receive the HARQ-ACK information. By adopting the method for indicating feedback information, the uplink resources occupied by HARQ feedback under multicast scheduling can be reduced, and the flexibility of the multicast HARQ feedback is increased.

In a possible implementation manner of the second aspect, the set of feedback time information includes first feedback time information, the set of feedback time information includes at least one feedback time information, and at least one value of the first indication information is associated with at least one feedback time information in the set of feedback time information. The first indication information takes a first preset value, and is used for indicating the network equipment not to receive the HARQ-ACK information, and the method comprises the following steps: and the feedback time information value associated with the first preset value in the feedback information set is a second preset value and is used for indicating that the network equipment does not receive the HARQ-ACK information. By adopting the method for indicating feedback information, the uplink resources occupied by HARQ feedback under multicast scheduling can be reduced, and the flexibility of the multicast HARQ feedback is increased.

In a possible implementation manner of the second aspect, the first indication information is used to instruct the terminal device to send a first resource of the HARQ-ACK information, the first resource set includes the first resource, the first resource set includes N resources, where at least one value of the first indication information is associated with at least one resource in the resource set, and N is a positive integer greater than or equal to 1. The first indication information takes a first preset value and is used for indicating the network equipment not to receive the HARQ-ACK information. By adopting the method for indicating feedback information, the uplink resources occupied by HARQ feedback under multicast scheduling can be reduced, and the flexibility of the multicast HARQ feedback is increased.

In a possible implementation manner of the second aspect, the mth value of the first indication information is associated with a resource in the resource set, at least 1 resource of which the 1 st value to (M-1) th value of the first indication information is not mapped to the resource in the resource set exists, and M is greater than or equal to 2; the first indication information takes a first preset value, and is used for indicating the network equipment not to receive the HARQ-ACK information, and the method comprises the following steps: the first indication information value is not mapped to the resources in the resource set and is used for indicating the network equipment not to receive the HARQ-ACK information.

In a possible implementation manner of the second aspect, an ith resource in the first resource set is associated with an ith+kth value of the first indication information, i < N, k being greater than or equal to 1; the first indication information takes a first preset value, and is used for indicating the network equipment not to receive the HARQ-ACK information, and the method comprises the following steps: the first resource associated with the first preset value in the resource set is a j-th value, and is used for indicating that the network equipment does not receive HARQ-ACK information, j is more than or equal to 1 and less than or equal to k, wherein j and k are positive integers. By adopting the method for indicating feedback information, the uplink resources occupied by HARQ feedback under multicast scheduling can be reduced, and the flexibility of the multicast HARQ feedback is increased.

In a possible implementation manner of the second aspect, the first indication information takes a first preset value, and is used for indicating that the network device does not receive HARQ-ACK information, including: the first preset value is mapped to resource configuration information corresponding to the first resource, and the resource configuration information comprises a first parameter, wherein the first parameter is used for indicating that the network equipment does not receive the HARQ-ACK information.

In a possible implementation manner of the second aspect, the first parameter is used to indicate that the network device does not receive HARQ-ACK information, and includes: the first parameter takes a third preset value, and is used for indicating that the network equipment does not receive the HARQ-ACK information.

In a possible implementation manner of the second aspect, the method further includes: the first preset value is mapped to resource configuration information corresponding to the first resource, and the resource configuration information does not include a first parameter and is used for indicating that the network equipment does not receive the HARQ-ACK information.

In a possible implementation manner of the second aspect, the method further includes: the network device does not receive an HARQ codebook, the HARQ codebook comprising a plurality of HARQ-ACK information, and the plurality of HARQ-ACK information are each determined to be not transmitted; alternatively, the network device receives a HARQ codebook that includes a plurality of HARQ-ACK information, and at least one HARQ-ACK information among the plurality of HARQ information is not determined to be not transmitted.

In a third aspect, there is provided a terminal device comprising: a receiving unit, configured to receive downlink control information DCI from a network device, where the DCI is scrambled by a group radio network temporary identifier G-RNTI, and the DCI is used to schedule a physical downlink shared channel PDSCH, where the DCI includes first indication information. The processing unit determines not to send HARQ-ACK information according to the first preset condition; the first preset condition includes that the first indication information takes a first preset value, and the HARQ-ACK information is used for indicating a receiving state of the PDSCH.

In a possible implementation manner of the third aspect, the first indication information indicates first feedback time information, where the first feedback time information is a number of time units from a time unit where the PDSCH is located to a time unit where the HARQ-ACK information is sent; wherein, this processing unit is specifically used for: and taking a first preset value according to the first indication information, and determining not to send HARQ-ACK information. By adopting the method for indicating feedback information, the uplink resources occupied by HARQ feedback under multicast scheduling can be reduced, and the flexibility of the multicast HARQ feedback is increased.

In a possible implementation manner of the third aspect, the feedback time information set includes first feedback time information, the feedback time information set includes at least one feedback time information, at least one value of the first indication information is associated with at least one feedback time information in the feedback time information set, and the processing unit is specifically configured to: and determining not to send HARQ-ACK information according to the feedback time information value associated with the first preset value in the feedback time information set as a second preset value. By adopting the method for indicating feedback information, the uplink resources occupied by HARQ feedback under multicast scheduling can be reduced, and the flexibility of the multicast HARQ feedback is increased.

In a possible implementation manner of the third aspect, the first indication information is used for indicating the terminal equipment to send a first resource of HARQ-ACK information, the first resource set includes the first resource, the first resource set includes N resources, where at least one value of the first indication information is associated with at least one resource in the resource set, and N is a positive integer greater than or equal to 1; wherein, this processing unit is specifically used for: and taking a first preset value according to the first indication information, and determining not to send the HARQ-ACK information.

In a possible implementation manner of the third aspect, an mth value of the first indication information is associated with a resource in the resource set, at least 1 resource of which the 1 st value to (M-1) th value of the first indication information is not mapped to the resource in the resource set exists, and M is greater than or equal to 2; wherein, this processing unit is specifically used for: and according to the resources which are not mapped to the resource set by the first preset value, determining not to send the HARQ-ACK information.

In a possible implementation manner of the third aspect, an ith resource in the first resource set is associated with an ith+kth value of the first indication information, i < N, k being greater than or equal to 1; wherein, this processing unit is specifically used for: and determining not to send HARQ-ACK information according to the j th resource associated with the first preset value in the resource set, wherein j is more than or equal to 1 and less than or equal to k, and j and k are positive integers. By adopting the method for indicating feedback information, the uplink resources occupied by HARQ feedback under multicast scheduling can be reduced, and the flexibility of the multicast HARQ feedback is increased.

In a possible implementation manner of the third aspect, the processing unit is specifically configured to: the first preset value is mapped to resource configuration information corresponding to the first resource, the resource configuration information comprises a first parameter, and the terminal equipment determines not to send HARQ-ACK information according to the first parameter.

In a possible implementation manner of the third aspect, the processing unit is specifically configured to: and determining not to send the HARQ-ACK information according to the third preset value of the first parameter.

In a possible implementation manner of the third aspect, the processing unit is further configured to: the first preset value is mapped to resource configuration information corresponding to the first resource, the resource configuration information does not comprise a first parameter, and according to the fact that the resource configuration information does not comprise the first parameter, it is determined that HARQ-ACK information is not transmitted.

In a possible implementation manner of the third aspect, the processing unit is further configured to: an HARQ codebook is determined, wherein the HARQ codebook comprises a plurality of HARQ-ACK information, and the plurality of HARQ-ACK information corresponds to a plurality of PDSCHs. When the plurality of HARQ-ACK information are all determined not to be transmitted, not transmitting the HARQ codebook; or, when at least one HARQ-ACK information among the plurality of HARQ-ACK information is not determined to be not transmitted, transmitting the HARQ codebook.

In a fourth aspect, there is provided a network device comprising: a processing unit, wherein the network equipment determines that the terminal equipment does not send HARQ-ACK information, and the HARQ-ACK information is used for indicating the receiving state of the PDSCH; a transmitting unit configured to transmit downlink control information DCI scrambled by a group radio network temporary identifier G-RNTI, the DCI being used for scheduling a PDSCH, the DCI including first indication information; the first indication information takes a first preset value and is used for indicating the processing unit not to receive the HARQ-ACK information.

In a possible implementation manner of the fourth aspect, the first indication information indicates first feedback time information, where the first feedback time information is a number of time units between a time unit where the PDSCH is located and a time unit where the HARQ-ACK information is sent, and the processing unit is specifically configured to: the first indication information takes a first preset value and is used for indicating the processing unit not to receive the HARQ-ACK information. By adopting the method for indicating feedback information, the uplink resources occupied by HARQ feedback under multicast scheduling can be reduced, and the flexibility of the multicast HARQ feedback is increased.

In a possible implementation manner of the fourth aspect, the set of feedback time information includes first feedback time information, the set of feedback time information includes at least one feedback time information, and at least one value of the first indication information is associated with at least one feedback time information in the set of feedback time information. The processing unit is specifically used for: and the feedback time information value associated with the first preset value in the feedback information set is a second preset value and is used for indicating the processing unit not to receive the HARQ-ACK information. By adopting the method for indicating feedback information, the uplink resources occupied by HARQ feedback under multicast scheduling can be reduced, and the flexibility of the multicast HARQ feedback is increased.

In a possible implementation manner of the fourth aspect, the first indication information is used to instruct the terminal device to send a first resource of the HARQ-ACK information, the first resource set includes the first resource, the first resource set includes N resources, where at least one value of the first indication information is associated with at least one resource in the resource set, and N is a positive integer greater than or equal to 1. The first indication information takes a first preset value and is used for indicating the processing unit not to receive the HARQ-ACK information. By adopting the method for indicating feedback information, the uplink resources occupied by HARQ feedback under multicast scheduling can be reduced, and the flexibility of the multicast HARQ feedback is increased.

In a possible implementation manner of the fourth aspect, the mth value of the first indication information is associated with a resource in the resource set, at least 1 resource of which the 1 st value to (M-1) th value of the first indication information is not mapped to the resource in the resource set exists, and M is greater than or equal to 2; wherein, this processing unit is specifically used for: the first indication information value is not mapped to the resources in the resource set and is used for indicating the processing unit not to receive the HARQ-ACK information.

In a possible implementation manner of the fourth aspect, the ith resource in the first resource set is associated with the (i+k) th value of the first indication information, i < N, k is greater than or equal to 1; wherein, this processing unit is specifically used for: the first resource associated with the first preset value in the resource set is a j-th value, and is used for indicating the processing unit not to receive HARQ-ACK information, j is more than or equal to 1 and less than or equal to k, wherein j and k are positive integers. By adopting the method for indicating feedback information, the uplink resources occupied by HARQ feedback under multicast scheduling can be reduced, and the flexibility of the multicast HARQ feedback is increased.

In a possible implementation manner of the fourth aspect, the processing unit is specifically configured to: the first preset value is mapped to resource configuration information corresponding to the first resource, and the resource configuration information comprises a first parameter, wherein the first parameter is used for indicating a processing unit not to receive HARQ-ACK information.

In a possible implementation manner of the fourth aspect, the first parameter is used to instruct the processing unit not to receive HARQ-ACK information, and includes: the first parameter takes a third preset value, and is used for indicating the processing unit not to receive the HARQ-ACK information.

In a possible implementation manner of the fourth aspect, the processing unit is further configured to: the first preset value is mapped to resource configuration information corresponding to the first resource, and the resource configuration information does not include a first parameter and is used for indicating the processing unit not to receive the HARQ-ACK information.

In a possible implementation manner of the fourth aspect, the processing unit is further configured to: not receiving an HARQ codebook, the HARQ codebook including a plurality of HARQ-ACK information, and the plurality of HARQ-ACK information being determined not to be transmitted; alternatively, a HARQ codebook is received, the HARQ codebook including a plurality of HARQ-ACK information, and at least one HARQ-ACK information among the plurality of HARQ information is not determined to be not transmitted.

In a fifth aspect, a terminal device is provided, the device comprising at least one processor and a memory, the at least one processor being configured to perform the method of the first aspect or any of the possible implementations of the first aspect.

In a sixth aspect, there is provided a terminal device comprising at least one processor and a memory, the at least one processor being configured to perform the method of the second aspect above or any possible implementation of the second aspect.

In a seventh aspect, a terminal device is provided, the device comprising at least one processor and interface circuitry, the at least one processor being configured to perform the method of the first aspect or any of the possible implementations of the first aspect.

In an eighth aspect, there is provided a terminal device comprising at least one processor and interface circuitry, the at least one processor being configured to perform the method of the second aspect above or any possible implementation of the second aspect.

A ninth aspect provides a computer program product comprising a computer program for performing the method of the first aspect or any possible implementation of the first aspect or the method of the second aspect or any possible implementation of the second aspect when executed by a processor.

In a tenth aspect, there is provided a computer readable storage medium having stored therein a computer program for performing the method of the first aspect or any of the possible implementations of the first aspect or performing the method of the second aspect or any of the possible implementations of the second aspect when the computer program is executed.

Drawings

Fig. 1 is a schematic architecture diagram of a mobile communication system suitable for use in embodiments of the present application.

Fig. 2 is a schematic diagram of HARQ feedback performed on PUCCH resources by a UE in a multicast scenario.

Fig. 3 is a schematic flowchart of a method for indicating feedback information according to an embodiment of the present application.

Fig. 4 is a schematic flow chart of another method for indicating feedback information provided in an embodiment of the present application.

Fig. 5 is a schematic flow chart of another method for indicating feedback information provided in an embodiment of the present application.

Fig. 6 is a schematic flow chart of another method for indicating feedback information provided in an embodiment of the present application.

Fig. 7 is a schematic diagram of mapping relation of PUCCH resource configuration provided in an embodiment of the present application.

Fig. 8 is a schematic diagram of offset values of PUCCH resource configuration provided in an embodiment of the present application.

Fig. 9 is a schematic flow chart of another method for indicating feedback information provided in an embodiment of the present application.

Fig. 10 is a schematic diagram of a PUCCH resource configuration first parameter provided in an embodiment of the present application.

Fig. 11 is a schematic flowchart of another method for indicating feedback information provided in an embodiment of the present application.

Fig. 12 is a schematic diagram of another PUCCH resource configuration first parameter provided in an embodiment of the present application.

Fig. 13 is a schematic diagram of a resource configuration according to an embodiment of the present application.

Fig. 14 is a schematic diagram of a method for indicating feedback information according to an embodiment of the present application.

Fig. 15 is a schematic diagram of another method for indicating feedback information according to an embodiment of the present application.

Fig. 16 is a schematic diagram of a communication device according to an embodiment of the present application.

Fig. 17 is a schematic diagram of another communication device according to an embodiment of the present application.

Fig. 18 is a schematic diagram of a terminal device provided in an embodiment of the present application.

Fig. 19 is a schematic diagram of a network device according to an embodiment of the present application.

Detailed Description

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

The technical solution of the embodiment of the application can be applied to various communication systems, for example: the long term evolution (long term evolution, LTE) system, the fifth generation (5th generation,5G) mobile communication system, or the future evolution mobile communication system, the mobile communication system applied in the embodiments is not limited in this application.

Fig. 1 is a schematic architecture diagram of a mobile communication system suitable for use in embodiments of the present application. As shown in fig. 1, the mobile communication system 100 may include a core network device 110, a radio access network device 120, and at least one terminal device (e.g., terminal device 130 and terminal device 140 shown in fig. 1). The terminal equipment is connected with the wireless access network equipment in a wireless mode, and the wireless access network equipment is connected with the core network equipment in a wireless or wired mode. The core network device and the radio access network device may be separate physical devices, or may integrate the functions of the core network device and the logic functions of the radio access network device on the same physical device, or may integrate the functions of part of the core network device and part of the radio access network device on one physical device. The terminal device may be fixed in position or may be movable. Fig. 1 is only a schematic diagram, and other network devices may be further included in the communication system, for example, a wireless relay device and a wireless backhaul device may also be included, which are not shown in fig. 1. The embodiments of the present application do not limit the number of core network devices, radio access network devices, and terminal devices included in the mobile communication system.

The Terminal devices in the mobile communication system 100 may also be referred to as a Terminal, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), and the like. The terminal device may be a mobile phone, a tablet (Pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented Reality (Augmented Reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), etc. The foregoing terminal device and a chip applicable to the foregoing terminal device are collectively referred to as a terminal device in this application. It should be understood that the embodiment of the present application does not limit the specific technology and the specific device configuration adopted by the terminal device.

In the mobile communication system 100, the radio access network device 120 is an access device to which a terminal device accesses by wireless. The radio access network device 120 may be: a base station, an evolved node B (bs), a home base station, an Access Point (AP) in a WIFI system, a wireless relay node, a wireless backhaul node, a transmission point (transmission point, TP), or a transmission reception point (transmission and reception point, TRP), etc., may also be a gNB in an NR system, or may also be a component or a part of a device that forms a base station, such as a Centralized Unit (CU), a Distributed Unit (DU), or a baseband unit (BBU), etc. It should be understood that in the embodiments of the present application, the specific technology and specific device configuration adopted by the radio access network device are not limited. In this application, the radio access network device is simply referred to as a network device, and if no special description is given, the network devices in this application refer to the radio access network devices. In this application, the network device may refer to the network device itself, or may be a chip applied to the network device to complete a wireless communication processing function.

In the embodiment of the application, the terminal device or the network device includes a hardware layer, an operating system layer running above the hardware layer, and an application layer running above the operating system layer. The hardware layer comprises a central processing unit (central processing unit, CPU), a memory management unit (memory management unit, MMU), a memory and other hardware. The operating system may be any one or more computer operating systems that implement business processes through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address book, word processing software, instant messaging software and the like. Further, the embodiment of the present application is not particularly limited to the specific structure of the execution body of the method provided in the embodiment of the present application, as long as the communication can be performed by the method provided in the embodiment of the present application by running the program recorded with the code of the method provided in the embodiment of the present application, and for example, the execution body of the method provided in the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call the program and execute the program.

In order to facilitate understanding of the embodiments of the present application, several concepts related to the present application will be briefly described below.

Unicast and multicast:

in a New Radio (NR) system, the UE has three radio resource control (radio resource control, RRC) states: idle state (idle), RRC connected state and inactive state (inactive). When the UE is in the idle state, the base station may send system information through broadcasting, and after the UE reads the message broadcast by the base station, access is completed and the UE is converted into the RRC connected state. For the UE in RRC connected state, since the services of different UEs may be different, the base station issues a data service to the UE by multicast or unicast transmission. The base station allocates a cell radio network temporary identifier (cell-radio network temporary identifier, C-RNTI) to the UE, and the UE receives data according to downlink control information (downlink control information, DCI) scrambled by the C-RNTI, where the one-to-one data transmission is unicast. If multiple UEs receive the same data traffic, the base station assigns the UEs the same group radio network temporary identity (geran-radio network temporary identifier, G-RNTI), and different UEs may receive the same data traffic according to the same G-RNTI scrambled DCI, such one-to-many data transmission being multicast. For a single UE, the base station may allocate a C-RNTI to receive unicast traffic or allocate a G-RNTI to receive multicast traffic.

In an NR system, a UE determines a slot to be blind-detected according to a Bandwidth (BWP) and a Search Space (Search Space) configuration. The UE determines a radio network temporary identifier (radio network temporary identity, RNTI) according to the own receiving requirement, and blindly detects a physical uplink control channel (physical uplink control channel, PUCCH) with the determined RNTI in the determined time slot. If the blind detection is successful, the UE acquires the DCI and determines the position of the downlink data and the time slot in which the feedback information is located according to the indication in the DCI. Different data services correspond to different RNTIs, for example, unicast downlink data corresponds to C-RNTI and multicast downlink data corresponds to G-RNTI. Taking multicast downlink data as an example, a base station selects a G-RNTI to scramble DCI corresponding to the multicast downlink data. The UE blindly detects the multicast PDCCH in the downlink time slot by using the G-RNTI. If the blind detection is successful, the UE obtains the corresponding multicast DCI, and determines the position of the multicast downlink data and the time slot for sending the feedback information according to the related bit field indication in the multicast DCI. The present application is not limited herein with respect to distinguishing between unicast and multicast.

Bit field:

the bit field refers to a certain part of a string of bits. For example, 10 bits are used, and the first, second and third bits jointly indicate a certain function, so that the first to third bits are one bit field. For DCI scheduling multicast downlink data, its DCI format includes formats 1_0, 1_1 and 1_2. The downlink DCI may be divided into a plurality of bit fields, and the indication effect of different bit fields is different. Such as the "Time domain resource assignment" bit field, indicating time domain information of the scheduled physical downlink shared channel (physical downlink shared channel, PDSCH), including start symbol, time domain length, etc.; a 'PDSCH-to-harq_ feedback timing indicator' bit field for indicating in which uplink time slot the terminal device feeds back HARQ-ACK information for the corresponding PDSCH; the "PUCCH resource indicator" bit field is used to indicate which PUCCH resource is selected when the terminal device feeds back HARQ-ACK information.

In NR, unicast employs a hybrid automatic repeat request (hybrid automatic repeat request, HARQ) mechanism to ensure reliability of transmission. Following the following example, the UE feeds back Acknowledgement (ACK) information on the PUCCH if the reception is correct after the UE receives the PDSCH, and negative acknowledgement (negative acknowledge, NACK) information on the PUCCH if the reception is incorrect. The time domain position of the PUCCH where the feedback information is located is indicated by DCI. When the UE transmits HARQ-ACK information on the PUCCH, the UE needs to first acknowledge a PUCCH resource set containing a plurality of PUCCH resources, and acknowledge one PUCCH resource in the resource set to perform transmission of HARQ-ACK information.

And introducing an HARQ feedback mechanism in NR multicast, and the base station can grasp the condition of receiving multicast data by the user through feedback information of the user, so as to improve the transmission reliability of the communication system. However, when the number of users for multicast scheduling is large, as shown in fig. 2, each UE performs HARQ-ACK information feedback on the PUCCH resource, which occupies many uplink resources.

Based on the above problems, the application provides a method and a device for indicating feedback information, which can reduce uplink resources occupied by HARQ-ACK information feedback under multicast scheduling and increase flexibility of the feedback of the multicast HARQ-ACK information.

The method for transmitting feedback information provided in the present application is described in detail below with reference to fig. 3, and fig. 3 is a schematic interaction diagram of a method for indicating feedback information provided in an embodiment of the present application, where the method may be applied to the scenario shown in fig. 1, and of course, may also be applied to other communication scenarios, and the embodiment of the present application is not limited herein.

It should be understood that in the embodiment of the present application, the method is described taking the terminal device and the network device as the execution bodies of the execution method as an example. By way of example, and not limitation, the execution subject of the execution method may also be a chip applied to the terminal device and a chip applied to the base station.

As shown in fig. 3, the method includes:

s210, the network device sends downlink control information DCI to the terminal device, where the DCI is scrambled by the G-RNTI and is used for scheduling PDSCH, where the DCI includes first indication information. Correspondingly, the terminal device receives the downlink control information DCI from the network device and the first indication information included in the DCI.

S220, the terminal equipment determines not to send HARQ-ACK information to the network equipment according to the condition that the first preset condition is met, wherein the first preset condition is that the first indication information takes a first preset value, and the HARQ-ACK information is used for indicating the receiving state of the PDSCH.

It should be understood that the first indication information takes a first preset value for indicating that the network device does not receive HARQ-ACK information and/or the terminal device takes the first preset value according to the first indication information to determine that HARQ-ACK information is not transmitted.

According to the method for indicating feedback information, a terminal device receives Downlink Control Information (DCI) from a network device, wherein the DCI is scrambled by a G-RNTI and is used for scheduling a PDSCH, and the DCI comprises first indication information. The terminal equipment takes a first preset value according to the first indication information, determines not to send the HARQ-ACK information to the network equipment, can reduce uplink resources occupied by the HARQ-ACK information feedback under the multicast scheduling, and increases the flexibility of the multicast HARQ-ACK information feedback.

Specifically, when the network device sends downlink data to the terminal device, the terminal device needs to send the downlink data to the terminal device on the PDSCH, and determines whether to send HARQ-ACK information to the network device according to whether the downlink data is received. Therefore, in S210, the network device sends DCI including the first indication information to the terminal device, and in S220, the terminal device determines not to send HARQ-ACK information to the network device according to the first preset condition being satisfied, that is, the first indication information takes the first preset value.

The first indication information may be sent to the terminal device in the form of higher-layer configuration information, or may also be signaled to the terminal device in other forms, where the specific form or sending manner of the first indication information is not limited in this application.

It should be understood that the G-RNTI may be used to identify a multicast or broadcast schedule, which may be configured by a network device for a group of terminal devices, and other identifiers may be adopted for multicast or broadcast scheduling, such as an M-RNTI, etc., which is not limited in this embodiment of the present application.

It should also be understood that the first indication information may be a "PDSCH-to-harq_ feedback timing indicator" bit field or a "PUCCH resource indicator" bit field in the embodiments of the present application, and the first indication information is not limited herein.

Alternatively, as an embodiment, fig. 4 is a schematic interaction diagram of a method for indicating feedback information according to an embodiment of the present application, as shown in fig. 4.

S240, the terminal equipment takes a first preset value according to the first indication information, and determines not to send HARQ-ACK information to the network equipment.

Specifically, the terminal device receives DCI sent by the network device, the DCI schedules PDSCH in a multicast form, and the DCI includes first indication information, where the first indication information indicates first feedback time information. The first feedback time information is the number of time units from the time unit where the PDSCH is located to the time unit where the HARQ-ACK information is transmitted. And the terminal equipment takes a first preset value according to the first indication information and determines not to send HARQ-ACK information to the network equipment.

The following illustrates that, as shown in table 1, the first indication information is "PDSCH-to-harq_ feedback timing indicator" bit field, and when the value of the "PDSCH-to-harq_ feedback timing indicator" bit field in the DCI is '000', the terminal device sends HARQ-ACK information to the network device in the determined uplink timeslot; when the value is '010', the terminal device determines not to send the HARQ-ACK information corresponding to the PDSCH scheduled by the DCI to the network device according to the value of the bit field, and does not store the ACK/NACK information.

It should be understood that, for DCI of multicast downlink data, configuration information corresponding to first indication information in format 1_0, format 1_1 and format 1_2 of the DCI may be configured by RRC, where a value in the first indication information corresponding set is configured by RRC, and the specific value in the set is not limited in this application.

List one corresponding relation between PDSCH-to-HARQ_ feedback timing indicator bit field and feedback information transmitting state

Therefore, in this embodiment, the indication terminal device that can be displayed by the first indication information value included in the DCI does not send HARQ-ACK information, so as to reduce uplink resources occupied by HARQ feedback under multicast scheduling. The base station can flexibly configure the corresponding relation between the values of the first indication information of different terminal devices and the sending state of the feedback information, so that the flexibility of the feedback of the multicast HARQ is improved.

Alternatively, as an embodiment, fig. 5 is a schematic interaction diagram of a method for indicating feedback information according to an embodiment of the present application. As shown in figure 5 of the drawings,

s210, the network device sends DCI to the terminal device, where the DCI is scrambled by the G-RNTI and is used to schedule the PDSCH, where the DCI includes the first indication information. Correspondingly, the terminal device receives the DCI from the network device and the first indication information included in the DCI.

S230, the network equipment configures the corresponding relation between the value of the first indication information and the feedback time set.

S231, the network equipment configures a second preset value.

S222, when the terminal equipment takes a first preset value according to the first indication information, the feedback time information value associated with the first preset value in the feedback time information set is a second preset value, and it is determined that HARQ-ACK information is not sent to the network equipment.

It should be understood that when the terminal device takes the first preset value according to the first indication information, the feedback time information value associated with the first preset value in the feedback time information set is the second preset value, so that it is determined that the HARQ-ACK information is not transmitted and/or the network device is indicated not to receive the HARQ-ACK information.

Specifically, the terminal device receives DCI sent by the network device, where the DCI schedules the PDSCH in a multicast form, and the DCI includes first indication information, where the first indication information indicates the first feedback time information. The first feedback time information is the number of time units from the time unit where the PDSCH is located to the time unit where the HARQ-ACK information is transmitted. The network equipment configures a corresponding relation between the first indication information value and the feedback time set and a second preset value, and when the terminal equipment takes the first preset value according to the first indication information, the feedback time information value associated with the first preset value in the feedback time information set is the second preset value, so that the HARQ-ACK information is determined not to be sent to the network equipment.

In S230, the first indication information has a corresponding relationship with the feedback time set, where the feedback time set may be "dl-DataToUL-ACK" or "dl-DataToUL-ACKForDCIFormat1_2", and the values in the set are configured by RRC dedicated signaling. For DCI scheduling multicast downlink data, the DCI formats include 1_0, 1_1 and 1_2, where configuration information corresponding to the first indication information in DCI format 1_0 scrambled by the G-RNTI may also be configured by RRC dedicated signaling, and a specific mapping rule is shown in table two.

In S231, the network device configures a second preset value, and if the first indication information in the DCI, that is, the value of the "PDSCH-to-harq_ feedback timing indicator" bit field in table two corresponds to the value in the feedback time information set being the second preset value, the terminal device does not send HARQ-ACK information of the PDSCH scheduled by the multicast DCI, and does not save the ACK/NACK information. In the present application, DCI format 1_1 or DCI format 1_0 is taken as an example, and '-1' is taken as an example to represent a first preset value, where the first preset value may also be other values, which is not limited in the present application.

The following illustrates that the RRC dedicated signaling configures dl-DataToUL-ACK to { -1,1,2,3,4,5,6,7}. If the "PDSCH-to-harq_ feedback timing indicator" bit field in the multicast DCI is '000', which corresponds to the first value '-1' in the configured dl-DataToUL-ACK, that is, the configured second preset value, the terminal device does not send HARQ-ACK information corresponding to the PDSCH scheduled by the multicast DCI at this time, and does not save the ACK/NACK feedback information.

It should be understood that, for DCI of multicast scheduling downlink data, configuration information corresponding to first indication information in format 1_0, format 1_1, and format 1_2 of the DCI may be configured by RRC dedicated signaling, where a value in a set corresponding to the first indication information is configured by RRC dedicated signaling, and the specific value in the set is not limited in this application.

Optionally, the bit size of the bit field of the first indication information in the DCI format 1_0 for multicast scheduling is fixed, i.e. cannot be configured by RRC-specific signaling, for example, fixed to 3 bits, but the bit field corresponding to the bit field is configurable by RRC-specific signaling, for example, RRC-specific signaling configures the bit field (for example, dl-DataToUL-ACK) to { -1,1,2,3,4,5,6,7}, and may also be configured to other values, where 1,2,3,4,5,6,7 respectively represent the number of time units between the time unit where the PDSCH is located and the time unit where the HARQ-ACK information is sent, and the value '-1' does not relate to the actual number of time units between the time unit where the PDSCH is located and the time unit where the HARQ-ACK information is sent, i.e. the value of-1 represents that no HARQ-ACK needs to be fed back.

Optionally, the terminal device may also receive or detect a second DCI scrambled by a unicast RNTI (such as a C-RNTI), which is also DCI format 1_0, where DCI format 1_0 of the second DCI also includes a dl-DataToUL-ACK bit field whose bit size is also fixed, i.e. cannot be configured by RRC-specific signaling, such as fixed to 3 bits; meanwhile, the value corresponding to the bit field is not configurable by RRC-specific signaling, i.e., is also fixed, such as {1,2,3,4,5,6,7,8}.

Table two correspondence between PDSCH-to-harq_ feedback timing indicator bit field and number of slots

Therefore, in this embodiment, the terminal device may be implicitly indicated to not send HARQ-ACK information by the first indication information value and the second preset value in the multicast DCI, so as to reduce the uplink resources occupied by HARQ feedback under multicast scheduling. The base station can flexibly configure the corresponding relation between the first indication information values of different UE and the feedback time information set and the second preset value, so that the flexibility of the feedback of the multicast HARQ is improved.

It should also be understood that if there is no "PDSCH-to-harq_ feedback timing indicator" bit field in the multicast DCI, the terminal device does not transmit HARQ-ACK information corresponding to the PDSCH scheduled by the multicast DCI and does not save the ACK/NACK feedback information.

Alternatively, as an embodiment, fig. 6 is a schematic interaction diagram of a method for indicating feedback information according to an embodiment of the present application, as shown in fig. 6.

S210, the network device sends DCI to the terminal device, where the DCI is scrambled by the G-RNTI and is used to schedule the PDSCH, where the DCI includes the first indication information. Accordingly, the terminal device receives the DCI from the network device and the first indication information included in the DCI.

S250, the network equipment configures the corresponding relation between the first indication information value and the resources in the resource set.

Alternatively, the order of S250 and S210 is not fixed, which is not limited in this application.

Specifically, the terminal device receives DCI sent by the network device, where the DCI schedules PDSCH in a multicast form, and the DCI includes first indication information, where the first indication information indicates a first resource of the terminal device to send HARQ-ACK information. The first set of resources includes the first resource, the first set of resources includes N resources, and at least one value of the first indication information is associated with at least one resource in the set of resources. The network equipment configures the corresponding relation between the first indication information value and the resources in the resource set, and the terminal equipment takes a first preset value according to the first indication information and determines not to send HARQ-ACK information to the network equipment.

It should be understood that the network device determines resource sets according to the number of bits, and specifically, the network device configures a maximum of 4 PUCCH resource sets to the UE, and each resource set includes a maximum of 32 PUCCH resources. Each configured PUCCH resource has a PUCCH resource ID, and the PUCCH resource ID is stored in the resource list. The terminal device may determine one PUCCH resource set according to the number of bits of feedback information to be sent, for example, if the number of bits of feedback information is < =2, select the first PUCCH resource set; if 2< the number of bits of the feedback information < = N2, selecting a second PUCCH resource set; if N2< the number of bits of the feedback information < =n3, selecting a third PUCCH resource set; if N3< the number of bits of the feedback information < = 1706, a fourth PUCCH resource set is selected, and the method for determining the resource set is not limited in this application.

In S250, the terminal device configures a correspondence between the first indication information value and the resources in the resource set, and specifically, the terminal device determines a PUCCH resource according to a "PUCCH resource indicator" bit field (hereinafter abbreviated as PRI bit field) in DCI for scheduling downlink data, where the determining method is as shown in table three. The PUCCH resource includes a PUCCH resource ID, a physical layer resource block start index, a PUCCH resource format, and the like.

Table III PUCCH resource indicator and mapping relation of PUCCH resources in resource set

It should be understood that, for DCI scheduling multicast downlink data, the configuration information of the PRI bit fields and PUCCH resources of DCI formats 1_0, 1_1 and 1_2 scrambled by the G-RNTI are configured by RRC-specific signaling, and the specific mapping rule is not limited in this application.

In S240, the terminal device determines not to send HARQ-ACK information to the network device according to the value of the first indication information, that is, the value of the PRI bit field, and does not store the corresponding ACK/NACK information. In S240, if the PRI bit field of the multicast DCI does not have a corresponding resource ID, i.e., the PRI bit field is not mapped to a resource, the terminal device determines not to transmit HARQ-ACK information to the network device and does not save the corresponding ACK/NACK information.

In the following, a case where PRI bits are not mapped to resources is illustrated, and if the base station configures 4 PUCCH resources, PUCCH resource IDs are {1,2,3,4}, and the PUCCH resources correspond to PRI { '001', '011', '101', '111'. If the PRI value in the multicast DCI is '000', there is no PUCCH resource corresponding to pri= '000', so the terminal device does not transmit HARQ-ACK information of PDSCH scheduled by the multicast DCI. If the PRI value in the multicast DCI is '111', there is a PUCCH resource corresponding to pri= '111', so the terminal device sends HARQ-ACK information of the PDSCH scheduled by the multicast DCI on the PUCCH resource corresponding to pri= '111', i.e. the PUCCH resource with PUCCH resource ID 4.

It should be understood that the mapping relationship between the PRI bit field values and the PUCCH resources of different UEs is specifically configured by the base station. As shown in fig. 7, UE1, UE2, and UE3 all receive multicast downlink data, and the base station configures 3 PUCCH resources for three UEs, but the mapping relationship between the PRI bit field value of each UE and the PUCCH resources is specifically configured. Specifically, when the PRI value in the DCI for scheduling the multicast downlink data is "01", the PUCCH resource corresponding to pri= "01" is PUCCH resource 1 according to the specific mapping relationship, so that UE1 transmits HARQ-ACK information corresponding to the multicast downlink data on PUCCH resource 1. UE2 does not have PUCCH resources corresponding to pri= "01" according to its specific mapping relationship, so UE2 does not transmit HARQ-ACK information corresponding to the multicast downlink data. According to the specific mapping relation, the UE3 uses PUCCH resource 2 corresponding to pri= "01", so that the UE3 transmits HARQ-ACK information corresponding to the multicast downlink data on PUCCH resource 2. Wherein, PUCCH resources of each UE are configured by the base station, the resource numbers are merely for illustration, and the content of specific resource configurations is not limited herein.

Optionally, in S250, the network device may also add an offset value to the resource list while configuring the resource set. If the value mapped to the PRI bit field in the multicast DCI is an invalid value, the terminal equipment determines that the HARQ-ACK information is not transmitted, specifically, the ith resource in the resource set is associated with the (i+k) th value of the PRI bit field, i is less than N, k is more than or equal to 1, and the terminal equipment determines that the HARQ-ACK information is not transmitted according to the fact that the first resource in the resource set associated with the value of the PRI bit field is the j, wherein j is less than or equal to 1 and k is less than or equal to k, and j and k are positive integers.

In the following explanation, as shown in fig. 8, if the base station configures 4 PUCCH resources, the PUCCH resource ID is {1,2,3,4}, the original resource list should be {1,2,3,4}, but since the offset value of the base station configuration is 4, the first 4 values in the resource list need to be filled with specific values, such as '-1', in the original resource list because of the offset value, and the resource list at this time is { -1, -1, 2,3,4}. If the PRI value in the multicast DCI is '000', and the resource ID corresponding to pri= '000' in the resource list is '1', which is not the configured resource ID of the valid PUCCH resource, so the terminal device does not send HARQ-ACK information of the PDSCH scheduled by the multicast DCI. If the PRI value in the multicast DCI is '100', and the resource ID corresponding to pri= '100' in the resource list is '1', which is the configured resource ID of the valid PUCCH resource, so the terminal device sends HARQ-ACK information of the PDSCH scheduled by the multicast DCI on the PUCCH resource with PUCCH resource ID of 1.

In the embodiment of the application, the network device can implicitly instruct the terminal device not to send the HARQ-ACK information through the PRI bit field in the multicast DCI and a resource configuration method, thereby reducing the uplink resource occupied by HARQ feedback under multicast scheduling. The network equipment can flexibly configure PUCCH resources corresponding to PRI bit domains of different UE, and flexibility of feedback of multicast HARQ-ACK information is improved.

Alternatively, as an embodiment, fig. 9 is a schematic interaction diagram of a method for indicating feedback information according to an embodiment of the present application. As shown in the figure 9 of the drawings,

S251, the network device configures the corresponding relation between the first indication information value and the resources in the resource set and the first parameter.

S241, when the resource configuration information corresponding to the resource mapped by the terminal equipment according to the first indication information value comprises a first parameter, the terminal equipment determines not to send HARQ-ACK information to the network equipment according to the first parameter.

It should be understood that when the terminal device takes the first preset value according to the first indication information, the resource configuration information corresponding to the mapped resource includes the first parameter, and it is determined that the HARQ-ACK information is not transmitted and/or the terminal device is used for indicating that the network device does not receive the HARQ-ACK information.

Specifically, the terminal device receives DCI sent by the network device, where the DCI schedules PDSCH in a multicast form, and the DCI includes first indication information, where the first indication information indicates a first resource of the terminal device to send HARQ-ACK information. The first set of resources includes the first resource, the first set of resources including N resources, wherein at least one value of the first indication information is associated with at least one resource in the set of resources. The network equipment configures the corresponding relation between the first indication information value and the resources in the resource set and the first parameter, and the terminal equipment determines not to send HARQ-ACK information to the network equipment according to the first parameter.

The following examples are illustrative. The network device determines resource sets according to the number of bits, and specifically, the network device configures 4 PUCCH resource sets at most for the UE, and each resource set includes at most 32 PUCCH resources. Each configured PUCCH resource has a PUCCH resource ID, where the PUCCH resource ID is stored in a resource list, and a method for determining a resource set is not described herein.

In S251, the network device configures first indication information, where the first indication information is a PRI bit field, the network device configures a corresponding relationship between a PRI bit field value and a resource in a resource set and a first parameter, and specifically, the terminal device determines a PUCCH resource according to the PRI bit field in DCI for scheduling downlink data, where the determination method is shown in table four. The PUCCH resource includes a PUCCH resource ID, a physical layer resource block start index, a PUCCH resource format, and the like.

Table four PUCCH resource indicator mapping relation between PUCCH resources in resource set

It should be understood that, for DCI scheduling multicast downlink data, the configuration information of the PRI bit fields and PUCCH resources of DCI formats 1_0, 1_1 and 1_2 scrambled by the G-RNTI is configured by RRC-dedicated signaling, and the specific mapping rule is not limited in this application.

In S241, the terminal device determines a PUCCH resource set according to the number of bits, in which the base station configures PUCCH resources. The terminal equipment determines not to send HARQ-ACK information to the network equipment according to the first parameter included in the PUCCH resource. For example, if the base station configures 4 PUCCH resources, and the PUCCH resource ID is {1,2,3,4}, as shown in fig. 10, if the PRI value in the multicast DCI is '000', and the resource ID corresponding to pri= '000' in the resource list is '1', and at this time, there is a first parameter in the PUCCH resource with the resource ID of '1', the terminal device does not transmit HARQ-ACK information of the PDSCH scheduled by the multicast DCI. If the PRI value in the multicast DCI is '001', at this time, the resource ID corresponding to pri= '001' in the resource list is '2', at this time, there is no first parameter in the PUCCH resource with the resource ID of '2', at this time, the terminal device sends the HARQ-ACK information of the PDSCH scheduled by the multicast DCI on the PUCCH resource with the PUCCH resource ID of 2.

Alternatively, as an embodiment, fig. 11 is a schematic interaction diagram of a method for indicating feedback information according to an embodiment of the present application, as shown in fig. 11.

S251, the network device configures the corresponding relation between the first indication information value and the resources in the resource set, the first parameter and the third preset value.

And S242, when the resource configuration information corresponding to the resource mapped by the terminal equipment according to the value of the first indication information comprises a first parameter, the terminal equipment determines not to send HARQ-ACK information to the network equipment according to the value of the first parameter as a third preset value.

It should be understood that when the first indication information takes the first preset value, the resource configuration information corresponding to the mapped resource includes a first parameter, and the terminal device determines not to send HARQ-ACK information for the third preset value according to the first parameter value and/or is used for indicating the network device not to receive HARQ-ACK information.

Specifically, the terminal device receives DCI sent by the network device, the DCI schedules PDSCH in a multicast form, and the DCI includes first indication information, where the first indication information indicates a first resource of the terminal device to send HARQ-ACK information. The first set of resources includes the first resource, the first set of resources includes N resources, and at least one value of the first indication information is associated with at least one resource in the set of resources. The network equipment configures the corresponding relation between the first indication information value and the resources in the resource set, the first parameter and the third preset value, and the terminal equipment determines not to send HARQ-ACK information to the network equipment according to the first parameter value as the third preset value.

In S251, the terminal device determines a PUCCH resource set in which the base station configures PUCCH resources. And the terminal equipment determines not to send the HARQ-ACK information to the network equipment according to the fact that the first parameter is included in the PUCCH resource and is equal to a third preset value. For example, the UE determines a PUCCH resource set in which the base station configures PUCCH resources. If the base station configures 4 PUCCH resources, the PUCCH resource ID is {1,2,3,4}, and the base station configures a second preset value= '0', as shown in fig. 12. If the PRI value in the multicast DCI is '000', and the resource ID corresponding to pri= '000' in the resource list is '1', and at this time, there is a first parameter in the PUCCH resource with the resource ID of '1', and the first parameter is equal to a third preset value, the terminal device does not send HARQ-ACK information of the PDSCH scheduled by the multicast DCI. If the PRI value in the multicast DCI is '001', at this time, the resource ID corresponding to pri= '001' in the resource list is '2', at this time, there is a first parameter in the PUCCH resource with the resource ID of '2', but the first parameter is not equal to the third preset value, so the terminal device sends HARQ-ACK information of the PDSCH scheduled by the multicast DCI on the PUCCH resource with the PUCCH resource ID of 2.

According to the embodiment of the application, the terminal equipment can be implicitly indicated not to send the HARQ-ACK information through the PRI bit field, the first parameter and the third preset value in the multicast DCI, so that uplink resources occupied by HARQ feedback under multicast scheduling are reduced. The base station can flexibly configure the first parameter and the third preset value in the PUCCH resources of different UEs, so that the flexibility of the feedback of the multicast HARQ is improved.

Optionally, as an embodiment, the terminal device receives the multicast DCI and the multicast downlink data corresponding to the schedule, and the base station configures the second parameter to the terminal device, where the second parameter or a value of the second parameter is used to turn on or off a function of the UE to optionally send HARQ-ACK information.

It can be understood that: if the base station configures the second parameter for the UE or configures the second parameter and the second parameter is a fourth preset value, the UE takes the fourth preset value according to the second parameter or the second parameter to turn on or off the function of the UE for optionally sending the HARQ-ACK information. This means that the UE may take a first preset value according to the first indication information to determine whether to transmit HARQ-ACK information, or the UE may not take the first preset value according to the first indication information to determine whether to transmit HARQ-ACK information.

It should be understood that the first indication information may be a first bit field existing in the multicast DCI, or a "PDSCH-to-harq_ feedback timing indicator" bit field existing in the DCI, or a "PUCCH resource indicator" bit field existing in the DCI, which is not limited in this application.

For example, if the base station configures the second parameter for the UE or the configured second parameter takes a value of a fourth preset value, the first bit field in the multicast DCI can be used to explicitly indicate whether the UE sends HARQ-ACK information corresponding to the multicast downlink data; if the base station does not configure the second parameter for the UE or configures the second parameter but the second parameter value is not the fourth preset value, the first bit field in the DCI cannot be used to indicate, in a display manner, whether the UE sends HARQ-ACK information corresponding to the multicast downlink data.

For another example, if the base station configures the second parameter for the UE or the configured second parameter takes a value of a fourth preset value, the "PDSCH-to-harq_ feedback timing indicator" bit field and the "PUCCH resource indicator" bit field in the multicast DCI can be used to display or implicitly indicate whether the UE sends HARQ-ACK information corresponding to the DCI scheduled multicast downlink data as described in the previous embodiments; if the base station does not configure the second parameter for the UE or configures the second parameter and the second parameter value is not the fourth preset value, the "PDSCH-to-harq_ feedback timing indicator" bit field and the "PUCCH resource indicator" bit field in the DCI cannot be used to display or implicitly indicate whether the UE transmits HARQ-ACK information corresponding to the DCI scheduled multicast downlink data as described in the previous embodiments;

It will be appreciated that configuring the second parameter to the UE by the base station described above is an optional step. Alternatively, in the method for indicating feedback information according to the embodiment of the present application, the above steps may not be performed, and in this case, the UE may directly take the first preset value according to the first indication information to determine not to send HARQ-ACK information.

According to the embodiment of the invention, the base station configures the second parameter or the second parameter value for the UE, and the function of selectively sending the HARQ-ACK information by the UE is started or closed, so that the flexibility of sending the HARQ-ACK information of the multicast downlink data is improved.

Optionally, as an embodiment, the base station configures a first number of bits for the terminal device, and the terminal device receives the multicast DCI according to the first number of bits. The multicast DCI comprises a first bit field and a second bit field, wherein the first bit field is used for indicating whether the UE feeds back feedback information of a PDSCH scheduled by the DCI. As shown in fig. 13, the second bit field may include, but is not limited to: a frequency domain resource indication domain, a time domain resource indication domain, a PUCCH resource indication domain, etc.

Fig. 13 shows a positional relationship between a first bit field and a second bit field, specifically, the first bit field is an adjacent bit field after the second bit field, or the first bit field has a start bit of the (second bit number+1) th bit. Wherein the second bit field occupies a second number of bits, and the first number of bits is greater than a sum of the first number of bits and the second number of bits.

As mentioned above, in one possible implementation, when the base station does not configure the second parameter to the terminal device, or the configured second parameter has a value other than the fourth preset value, the terminal device only interprets the second bit field shown in fig. 13, or only interprets the previous (second number of bits). It is understood that the terminal device treats the start bit of the first bit field to the end bit of the multicast DCI as padding bits, i.e. as bits without meaning.

It should be noted that, in the case that the base station does not configure the second parameter through RRC signaling, or the value of the configured second parameter is not the fourth preset value, the UE does not make an assumption on the first bit field, or regards the first bit field as a reserved bit, or does not interpret the first bit field when the first bit number is greater than the second bit number, which should be understood that the embodiment of the present application is not limited. And for bits other than the bits occupied by the first bit field and the second bit field, the base station may fix the padding 0.

In one possible implementation manner, when the base station configures the second parameter to the terminal device, or the configured value of the second parameter is a fourth preset value, the terminal device simultaneously decodes the second bit field and the first bit field shown in fig. 13. It can be understood that the terminal device treats the end bits of the first bit field to the end bits of the multicast DCI as padding bits, i.e. as bits without meaning.

Specifically, for the case that the base station configures the second parameter through RRC signaling, or the value of the configured second parameter is a fourth preset value, the UE assumes that the first bit field exists, and according to the method of the foregoing embodiment, the terminal device determines whether to feedback information of the corresponding PDSCH according to the first bit field.

Optionally, as an embodiment, the terminal device receives a plurality of multicast DCIs and a plurality of multicast downlink data corresponding to the schedule, where the terminal device feeds back a plurality of feedback information corresponding to the plurality of multicast downlink data in a target time unit, where the plurality of feedback information is included in the HARQ codebook. In the target time unit, there are multiple pieces of feedback information corresponding to multiple pieces of multicast downlink data, the priorities corresponding to the multiple pieces of feedback information are the same, and/or PUCCH resources carrying the multiple pieces of feedback information overlap in the time domain.

In one possible implementation, if the terminal device determines to transmit at least one feedback information of the plurality of feedback information, the terminal device transmits all feedback information in the target time unit. Alternatively, it can be said that the terminal device transmits the HARQ codebook in the target time unit.

Specifically, the terminal device may send all feedback information, or the terminal device may determine and send a first codebook, where the first codebook includes all feedback information. The positions corresponding to all feedback information in the first codebook are filled with real receiving states. For example, if the feedback information is ACK, the ACK is filled; and if the feedback information is NACK, filling the NACK. Or determining some feedback information which is not transmitted by the terminal equipment, and filling NACK in the fixed positions corresponding to the feedback information in the first codebook regardless of the real receiving state of the feedback information; for the terminal equipment to determine some feedback information to be sent, the positions corresponding to the feedback information in the first codebook are filled with real receiving states, for example, if the feedback information is ACK, the ACK is filled; and if the feedback information is NACK, filling the NACK.

It should be understood that the terminal device may determine not to transmit some of the feedback information, or may determine to transmit some of the feedback information, in which case even feedback information determined by the terminal device to not be transmitted is transmitted. The method can unify the definition of the base station and the terminal equipment on the size of the first codebook, and improves the feedback efficiency and the success rate.

In one possible implementation manner, if the HARQ codebook further includes unicast feedback information corresponding to the unicast PDSCH, the terminal device sends all the feedback information in the target time unit. Alternatively, it can be said that the terminal device transmits the HARQ codebook in the target time unit.

Specifically, the terminal device may send all feedback information, or the terminal device may determine and send a first codebook, where the first codebook includes all feedback information, including unicast feedback information corresponding to a unicast PDSCH, multicast feedback information corresponding to a multicast PDSCH that is determined to be not sent, and/or multicast feedback information corresponding to a multicast PDSCH that is determined to be sent. The positions corresponding to all feedback information in the first codebook are filled with real receiving states. For example, if the feedback information is ACK, the ACK is filled; and if the feedback information is NACK, filling the NACK. Or determining some multicast feedback information which is not transmitted by the terminal equipment, and filling NACK in the position fixing corresponding to the feedback information in the first codebook regardless of the real receiving state of the feedback information; for the terminal equipment, determining multicast feedback information of some sent multicast PDSCH and/or unicast feedback information corresponding to unicast PDSHC, and filling the real receiving state at the corresponding positions of the feedback information in the first codebook, for example, filling ACK if the feedback information is ACK; and if the feedback information is NACK, filling the NACK.

It should be understood that, in the feedback information, there may be feedback information that the terminal device determines not to transmit, there may be feedback information that the terminal device determines to transmit, or there may be feedback information corresponding to the unicast PDSCH. In this case, even feedback information determined by the terminal device not to be transmitted is transmitted. The method can unify the definition of the base station and the terminal equipment on the size of the first codebook, and improves the feedback efficiency and the success rate.

In one possible implementation manner, if the terminal device determines not to transmit all feedback information in the plurality of feedback information, the terminal device does not transmit the plurality of feedback information in the target time unit, or it can be said that the terminal device does not transmit the HARQ codebook in the target time unit.

Specifically, the terminal device may not send all feedback information, or the terminal device may determine that the first codebook is not sent, where the first codebook includes all feedback information. The positions corresponding to all feedback information in the first codebook are filled with real receiving states, for example, if the feedback information is ACK, the positions are filled with ACK; and if the feedback information is NACK, filling the NACK. Or for the terminal equipment to determine some feedback information which is not transmitted, the position corresponding to the feedback information in the first codebook is fixedly filled with NACK, and for the terminal equipment to determine the transmitted feedback information, the position corresponding to the feedback information in the first codebook is filled with real receiving state, for example, if the feedback information is ACK, the position corresponding to the feedback information in the first codebook is filled with ACK; and if the feedback information is NACK, filling the NACK.

It should be understood that if the terminal device determines not to transmit all feedback information, the terminal device does not transmit the feedback information in the target time unit or does not transmit the first codebook of the feedback information. By the method, uplink resources can be saved.

For example, the terminal device receives the multicast pdsch#1 in the time unit #1, receives the multicast pdsch#2 and the multicast pdsch#3 in the time unit #2, determines that feedback information corresponding to the pdsch#1 to the pdsch#3 is fed back in the time unit #3 according to the multicast DCI for scheduling each PDSCH, and the priorities corresponding to the feedback information corresponding to the three PDSCHs are the same, for example, the values of the "Priority indicatior" fields in the three multicast DCIs may be the same. As shown in fig. 14, if the terminal device determines that feedback information #1 of multicast PDSCH #1 needs to be transmitted, feedback information #2 of multicast PDSCH #2 does not need to be transmitted, and feedback information #3 of multicast PDSCH #3 does not need to be transmitted according to the second parameter and/or the first indication information in the multicast DCI scheduling each PDSCH. In connection with the above-described method, since feedback information #1 of PDSCH #1 needs to be transmitted among the three multicast PDSCH, the terminal device transmits all feedback information (i.e., feedback information #1, feedback information #2, and feedback information # 3) in time unit #3. Specifically, the terminal device determines a first codebook, where the first codebook includes feedback information #1 to #3, and determines, in the time unit #3, a PUCCH resource for carrying the first codebook. The feedback information #1 to #3 in the first codebook is to fill the real receiving state. For example, if pdsch#1 is received correctly, feedback information#1 in the codebook is ACK; pdsch#2 received error, feedback information#2 in the codebook is NACK; and if the PDSCH#3 is correctly received, the feedback information#3 in the codebook is ACK. Alternatively, regardless of the actual reception state of the feedback information #2 and #3 in the first codebook, the feedback information #2 and #3 are fixedly padded with NACKs because the terminal device determines not to transmit the feedback information #2 and #3. While for feedback information #1, it is necessary to actually fill whether feedback information #1 is ACK or NACK according to the actual reception state of PDSHC # 1.

For example, as shown in fig. 15, if the terminal device determines that the feedback information #1 of the multicast PDSCH #1 does not need to be transmitted, the feedback information #2 of the multicast PDSCH #2 does not need to be transmitted, and the feedback information #3 of the multicast PDSCH #3 does not need to be transmitted according to the second parameter and/or the first indication information in the multicast DCI for scheduling each PDSCH, the terminal device does not transmit all the feedback information (feedback information #1 to # 3) in the time unit #3 in combination with the above-described method. Specifically, the terminal device determines a first codebook, where the first codebook includes feedback information #1 to #3, but the terminal device does not send the first codebook in time unit # 3. The feedback information #1 to #3 in the first codebook may all fill the actual reception state. For example, if pdsch#1 is received correctly, feedback information#1 in the first codebook is ACK; pdsch#2 receiving error, the feedback information #2 in the first codebook is NACK; and if the PDSCH#3 is correctly received, the feedback information#3 in the first codebook is ACK. Alternatively, the feedback information #1 to #3 in the first codebook is fixedly padded with NACK regardless of the actual reception state of the feedback information #1 to #3 in the first codebook because the feedback information #1 to #3 are determined not to be transmitted.

It should be understood that the manner, the case, the category, and the division of the embodiments in the embodiments of the present application are for convenience of description only, and should not be construed as a particular limitation, and the features in the various manners, the categories, the cases, and the embodiments may be combined without contradiction.

It should also be understood that in various embodiments of the present application, first, second, etc. are merely intended to represent that multiple objects are different. For example, the first preset value and the second preset value are only for showing different numerical values, and thus the first, second, etc. should not be any limitation to the embodiments of the present application.

It should also be understood that the above is only intended to assist those skilled in the art in better understanding the embodiments of the present application, and is not intended to limit the scope of the embodiments of the present application. It will be apparent to those skilled in the art from the foregoing examples that various equivalent modifications or variations can be made, for example, some steps of the methods described above may not be necessary, or some steps may be newly added, etc. Or a combination of any two or more of the above. Such modifications, variations, or combinations are also within the scope of embodiments of the present application.

It should also be understood that the foregoing description of embodiments of the present application focuses on highlighting differences between the various embodiments and that the same or similar elements not mentioned may be referred to each other and are not described in detail herein for brevity.

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

The method for indicating feedback information according to the embodiments of the present application is described in detail above with reference to fig. 3 to 15. The following describes the communication device according to the embodiment of the present application in detail with reference to fig. 16 to 19.

Fig. 16 shows a schematic block diagram of a terminal device 300 according to an embodiment of the present application, where the terminal device 300 may correspond to the terminal device described in the above method, or may be a chip or a component applied to the terminal device, and each unit in the terminal device 300 is used to perform each action or processing procedure performed by the terminal device in the above method, respectively, as shown in fig. 16, and the terminal device 300 may include: a communication unit 310 and a processing unit 320.

The communication unit 310 is configured to receive DCI from a network device, where the DCI includes first indication information;

the processing unit 320 is configured to determine that HARQ-ACK information is not transmitted according to a first preset condition being satisfied, where the first preset condition includes that the first indication information takes a first preset value, and the HARQ-ACK information is used to indicate a receiving state of the PDSCH.

It should be understood that, for brevity, the specific process of each unit in the terminal device 300 to execute the above corresponding steps is referred to the foregoing description of the method embodiment in connection with fig. 3 to 12, and will not be repeated herein.

Fig. 17 shows a schematic block diagram of a network device 400 according to an embodiment of the present application, where the network device 400 may correspond to the network device described in the above method, or may be a chip or a component applied to the network device, and each module or unit in the network device 400 is used to perform each action or process performed by the network device in the above method, respectively, as shown in fig. 17, where the network device 400 may include: a communication unit 410 and a processing unit 420.

The communication unit 410 is configured to send DCI to a terminal device by a network device, where the DCI includes first indication information;

the processing unit 420 is configured to configure a first preset condition, where the first preset condition includes that the first indication information takes a first preset value, and the network device determines not to receive HARQ-ACK information according to meeting the first preset condition, where the HARQ-ACK information is used to indicate a receiving state of the PDSCH.

It should be understood that, for brevity, the specific process of each unit in the network device 400 to perform the corresponding steps described above is referred to in the foregoing description of the method embodiment in connection with fig. 3 to 12, and will not be repeated herein.

In one example, the unit in any of the above apparatuses may be one or more integrated circuits configured to implement the above methods, for example: one or more application specific integrated circuits (application specific integrated circuit, ASIC), or one or more digital signal processors (digital signal processor, DSP), or one or more field programmable gate arrays (field programmable gate array, FPGA), or a combination of at least two of these integrated circuit forms. For another example, when the units in the apparatus may be implemented in the form of a scheduler of processing elements, the processing elements may be general-purpose processors, such as a central processing unit (central processing unit, CPU) or other processor that may invoke the program. For another example, the units may be integrated together and implemented in the form of a system-on-a-chip (SOC).

Fig. 18 shows a schematic structural diagram of a terminal device provided in an embodiment of the present application. Which may be the terminal device in the above embodiment, for implementing the operation of the terminal device in the above embodiment. As shown in fig. 18, the terminal device includes: an antenna 510, a radio frequency device 520, a signal processing part 530. The antenna 510 is connected to a radio frequency device 520. In the downlink direction, the radio frequency device 520 receives information transmitted by the network device through the antenna 510, and transmits the information transmitted by the network device to the signal processing part 530 for processing. In the uplink direction, the signal processing part 530 processes information of the terminal device and transmits the processed information to the radio frequency device 520, and the radio frequency device 520 processes information of the terminal device and transmits the processed information to the network device through the antenna 510.

The signal processing section 530 may include a modem subsystem for implementing processing of the various communication protocol layers of data; the system also comprises a central processing subsystem for realizing the processing of the terminal operating system and the application layer; in addition, other subsystems, such as a multimedia subsystem for implementing control of a terminal device camera, screen display, etc., a peripheral subsystem for implementing connection with other devices, etc., may be included. The modem subsystem may be a stand-alone chip. Alternatively, the above means for the terminal may be located in the modem subsystem.

The modem subsystem may include one or more processing elements 531, including, for example, a host CPU and other integrated circuits. In addition, the modulation and demodulation subsystem may also include a storage element 532 and an interface circuit 533. The storage element 532 is used to store data and programs, but the programs used to perform the methods performed by the terminal device in the above methods may not be stored in the storage element 532 but in a memory outside the modulation and demodulation subsystem. Interface circuit 533 is used to communicate with other subsystems. The above means for a terminal device may be located in a modem subsystem which may be implemented by a chip comprising at least one processing element for performing the steps of any of the methods performed by the above terminal device and interface circuitry for communicating with other means. In one implementation, the unit of the terminal device implementing each step in the above method may be implemented in the form of a processing element scheduler, for example, the apparatus for a terminal device includes a processing element and a storage element, and the processing element invokes the program stored in the storage element to perform the method performed by the terminal in the above method embodiment. The memory element may be a memory element where the processing element is on the same chip, i.e. an on-chip memory element.

In another implementation, the program for executing the method executed by the terminal device in the above method may be a storage element on a different chip than the processing element, i.e. an off-chip storage element. At this time, the processing element calls or loads a program from the off-chip storage element on the on-chip storage element to call and execute the method executed by the terminal in the above method embodiment.

In yet another implementation, the unit of the terminal device implementing the steps of the above method may be configured as one or more processing elements, which are disposed on the modem subsystem, where the processing elements may be integrated circuits, for example: one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits may be integrated together to form a chip.

The units of the terminal device implementing the steps of the above method may be integrated together and implemented in the form of a system-on-a-chip (SOC) chip for implementing the above method.

Fig. 19 is a schematic structural diagram of a network device according to an embodiment of the present application. For implementing the operations of the network device in the above embodiments. As shown in fig. 19, the network device includes: an antenna 601, a radio frequency device 602, a baseband device 603. The antenna 601 is connected to a radio frequency device 602. In the uplink direction, the radio frequency device 602 receives information transmitted from the terminal via the antenna 601, and transmits information transmitted from the terminal device to the baseband device 603 for processing. In the downlink direction, the baseband device 603 processes information of the terminal and sends the processed information to the radio frequency device 602, and the radio frequency device 602 processes information of the terminal equipment and sends the processed information to the terminal through the antenna 601.

The baseband apparatus 603 may include one or more processing elements 6031, e.g., including a master CPU and other integrated circuits. In addition, the baseband apparatus 603 may further include a storage element 6032 and an interface 6033, the storage element 6032 for storing programs and data; the interface 6033 is used to interact information with the radio frequency device 602, for example a common public radio interface (common public radio interface, CPRI). The above means for network device may be located in the baseband means 603, e.g. the above means for network device may be a chip on the baseband means 603 comprising at least one processing element for performing the steps of any of the methods performed by the above network device and interface circuitry for communicating with other means. In one implementation, the units of the network device implementing the steps in the above method may be implemented in the form of a processing element scheduler, for example, an apparatus for a network device includes a processing element and a storage element, where the processing element invokes the program stored in the storage element to perform the method performed by the network device in the above method embodiment. The memory elements may be memory elements on the same chip as the processing elements, i.e., on-chip memory elements, or may be memory elements on a different chip than the processing elements, i.e., off-chip memory elements.

In another implementation, the units of the network device implementing the steps of the above method may be configured as one or more processing elements, which are disposed on the baseband apparatus, where the processing elements may be integrated circuits, for example: one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits may be integrated together to form a chip.

The units of the network device implementing the steps of the above method may be integrated together and implemented in the form of a system on a chip, e.g. the baseband device comprises the SOC chip for implementing the above method.

The terminal device and the network device in the above-described respective apparatus embodiments may correspond completely to the terminal device or the network device in the method embodiments, and the respective steps are performed by respective modules or units, for example, when the apparatus is implemented in a chip, the receiving unit may be an interface circuit of the chip for receiving signals from other chips or apparatuses. The above unit for transmitting is an interface circuit of the device for transmitting signals to other devices, for example, when the device is implemented in the form of a chip, the transmitting unit is an interface circuit of the chip for transmitting signals to other chips or devices.

The embodiment of the application also provides a communication system, which comprises: the terminal device and the network device.

The embodiment of the application also provides a computer readable medium for storing a computer program code, where the computer program includes instructions for executing the method for transmitting feedback information in the embodiment of the application. The readable medium may be read-only memory (ROM) or random access memory (random access memory, RAM), which the embodiments of the present application do not limit.

The present application also provides a computer program product comprising instructions which, when executed, cause the terminal device and the network device to perform operations of the terminal device and the network device corresponding to the above method.

The embodiment of the application also provides a system chip, which comprises: a processing unit, which may be, for example, a processor, and a communication unit, which may be, for example, an input/output interface, pins or circuitry, etc. The processing unit may execute the computer instructions to cause a chip in the communication device to execute any of the feedback information transmission methods provided in the embodiments of the present application.

Optionally, the computer instructions are stored in a storage unit.

Alternatively, the storage unit is a storage unit in the chip, such as a register, a cache, etc., and the storage unit may also be a storage unit in the terminal located outside the chip, such as a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM), etc. The processor mentioned in any of the above may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of the program of the above-mentioned feedback information transmission method. The processing unit and the storage unit may be decoupled and respectively disposed on different physical devices, and the respective functions of the processing unit and the storage unit are implemented by wired or wireless connection, so as to support the system chip to implement the various functions in the foregoing embodiments. Alternatively, the processing unit and the memory may be coupled to the same device.

It will be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a ROM, a Programmable ROM (PROM), an erasable programmable EPROM (EPROM), an electrically erasable programmable EPROM (EEPROM), or a flash memory, among others. The volatile memory may be RAM, which acts as external cache. There are many different types of RAM, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), and direct memory bus RAM (DR RAM).

The terms "upstream" and "downstream" as used herein are used to describe the direction of data/information transmission in a specific scenario, for example, the "upstream" direction generally refers to the direction in which data/information is transmitted from a terminal to a network side, or the direction in which a distributed unit is transmitted to a centralized unit, and the "downstream" direction generally refers to the direction in which data/information is transmitted from a network side to a terminal, or the direction in which a centralized unit is transmitted to a distributed unit.

Various objects such as various messages/information/devices/network elements/systems/devices/actions/operations/processes/concepts may be named in the present application, and it should be understood that these specific names do not constitute limitations on related objects, and that the named names may be changed according to the scenario, context, or usage habit, etc., and understanding of technical meaning of technical terms in the present application should be mainly determined from functions and technical effects that are embodied/performed in the technical solution.

In the various embodiments of the application, if there is no specific description or logical conflict, terms and/or descriptions between the various embodiments are consistent and may reference each other, and features of the various embodiments may be combined to form new embodiments according to their inherent logical relationships.

The methods in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, 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 programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer program or instructions may be stored in or transmitted across a computer-readable storage medium. The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server that integrates one or more available media. The usable medium may be a magnetic medium, e.g., floppy disk, hard disk, tape; optical media such as CD-ROM, DVD; but also semiconductor media such as Solid State Disk (SSD), random access memory (random access memory, RAM), read-only memory (ROM), and registers.

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

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

Claims

A method of indicating feedback information, comprising:

the method comprises the steps that terminal equipment receives Downlink Control Information (DCI), wherein the DCI is scrambled by a group radio network temporary identifier (G-RNTI), the DCI is used for scheduling a Physical Downlink Shared Channel (PDSCH), and the DCI comprises first indication information;

The terminal equipment determines not to send HARQ-ACK information according to the first preset condition;

the first preset condition includes that the first indication information takes a first preset value, and the HARQ-ACK information is used for indicating a receiving state of the PDSCH.
The method of claim 1, wherein the first indication information indicates first feedback time information, the first feedback time information being a number of time units from a time unit in which the PDSCH is located to a time unit in which the HARQ-ACK information is transmitted.
The method according to claim 2, wherein the first feedback time information belongs to a feedback time information set, the feedback time information set includes at least one feedback time information, at least one value of the first indication information is associated with at least one feedback time information in the feedback time information set, the terminal device takes a first preset value according to the first indication information, and determining not to send the HARQ-ACK information includes:

the terminal equipment determines not to send the HARQ-ACK information according to the feedback time information value associated with the first preset value in the feedback time information set as a second preset value;

The feedback time information set is a set of the number of time units from the time unit where the PDSCH is located to the time unit where the HARQ-ACK information is sent.
The method of claim 1, wherein the first indication information is used to indicate the terminal device to send a first resource of the HARQ-ACK information, the first resource belongs to a first resource set, the first resource set includes N resources, at least one value of the first indication information is associated with at least one resource in the resource set, and N is a positive integer greater than or equal to 1.
The method of claim 4, wherein an mth value of the first indication information is associated with a resource in the first set of resources, wherein at least 1 value of the 1 st to (M-1) th values of the first indication information is not mapped to a resource in the first set of resources, and M is greater than or equal to 2;

the terminal device takes a first preset value according to the first indication information, determines not to send HARQ-ACK information, and comprises:

and the terminal equipment determines not to send the HARQ-ACK information according to the resources which are not mapped to the resource set by the first preset value.
The method of claim 4, wherein an ith resource in the first set of resources is associated with an ith+k value of the first indication information, i < N, k being greater than or equal to 1;

the terminal device takes a first preset value according to the first indication information, determines not to send HARQ-ACK information, and comprises:

and the terminal equipment determines not to send the HARQ-ACK information according to the j-th preset value, wherein j is more than or equal to 1 and less than or equal to k, and j and k are positive integers.
The method of claim 4, wherein the terminal device taking a first preset value according to the first indication information, determining not to send the HARQ-ACK information comprises:

the first preset value is mapped to resource configuration information corresponding to the first resource, and the resource configuration information comprises a first parameter;

and the terminal equipment determines not to send the HARQ-ACK information according to the first parameter.
The method of claim 4, wherein the terminal device taking a first preset value according to the first indication information, determining not to send the HARQ-ACK information comprises:

the first preset value is mapped to resource configuration information corresponding to the first resource, and the resource configuration information comprises a first parameter;

And the terminal equipment determines not to send the HARQ-ACK information according to the first parameter value as a third preset value.
The method of claim 4, wherein the terminal device taking a first preset value according to the first indication information, determining not to send the HARQ-ACK information comprises:

the first preset value is mapped to resource configuration information corresponding to the first resource, and the resource configuration information does not comprise a first parameter;

and the terminal equipment determines not to send the HARQ-ACK information according to the fact that the first parameter is not included in the resource configuration information, wherein the first parameter is used for indicating whether the terminal equipment sends the HARQ-ACK information or not.
The method according to any one of claims 1 to 9, further comprising:

and under the condition that the terminal equipment does not send the HARQ-ACK information, the terminal equipment does not store the HARQ-ACK information.
The method according to claims 1 to 9, characterized in that the method further comprises:

the terminal equipment determines an HARQ codebook, wherein the HARQ codebook comprises a plurality of pieces of HARQ-ACK information, and the plurality of pieces of HARQ-ACK information correspond to a plurality of PDSCH.

When the plurality of HARQ-ACK information are all determined not to be transmitted, the terminal device does not transmit the HARQ codebook; or,

and when at least one piece of HARQ-ACK information in the plurality of pieces of HARQ-ACK information is not determined to be not transmitted, the terminal equipment transmits the HARQ codebook.
A method of indicating feedback information, comprising:

the network equipment determines that the terminal equipment does not send HARQ-ACK information for indicating the receiving state of a physical downlink shared channel PDSCH;

the network equipment sends Downlink Control Information (DCI), wherein the DCI is scrambled by a group radio network temporary identifier (G-RNTI), the DCI is used for scheduling the PDSCH, and the DCI comprises first indication information;

the first indication information takes a first preset value and is used for indicating the network equipment not to receive the HARQ-ACK information.
The method of claim 12, wherein the first indication information indicates first feedback time information, the first feedback time information being a number of time units from a time unit in which the PDSCH is located to a time unit in which the HARQ-ACK information is transmitted.
The method of claim 13, wherein the first feedback time information belongs to a feedback time information set, the feedback time information set including at least one feedback time information, the at least one value of the first indication information being associated with the at least one feedback time information in the feedback time information set, the first indication information taking a first preset value for indicating that the network device does not receive the HARQ-ACK information, comprising:

the feedback time information value associated with the first preset value in the feedback information set is the second preset value, and is used for indicating that the network equipment does not receive the HARQ-ACK information;

the feedback time information set is a time unit number set between a time unit where the PDSCH is located and a time unit where the HARQ-ACK information is sent.
The method of claim 12, wherein the first indication information is used to indicate the terminal device to send a first resource of HARQ-ACK information, the first resource belongs to a first resource set, the first resource set includes N resources, at least one value of the first indication information is associated with at least one resource in the first resource set, and N is a positive integer greater than or equal to 1.
The method of claim 15, wherein an mth value of the first indication information is associated with a resource in the first set of resources, wherein at least 1 value of the 1 st to (M-1) th values of the first indication information is not mapped to a resource in the first set of resources, and M is greater than or equal to 2;

the first indication information takes a first preset value, which is used for indicating the network equipment not to receive the HARQ-ACK information, and includes:

the first preset value is not mapped to the resources in the first resource set and is used for indicating that the network equipment does not receive the HARQ-ACK information.
The method of claim 15, wherein an i-th resource in the first set of resources is associated with an i+k-th value of the first indication information, i < N, k being greater than or equal to 1;

the first indication information takes a first preset value, which is used for indicating the network equipment not to receive the HARQ-ACK information, and includes:

the first preset value is a j-th value and is used for indicating that the network equipment does not receive the HARQ-ACK information, j is more than or equal to 1 and less than or equal to k, wherein j and k are both positive integers.
The method of claim 15, wherein the first indication information takes a first preset value for indicating that the network device does not receive the HARQ-ACK information, comprising:

The first preset value is mapped to resource configuration information corresponding to the first resource, and the resource configuration information comprises a first parameter;

the first parameter is used to indicate that the network device does not receive the HARQ-ACK information.
The method of claim 15, wherein the first indication information takes a first preset value for indicating that the network device does not receive the HARQ-ACK information, comprising:

the first preset value is mapped to resource configuration information corresponding to the first resource, and the resource configuration information comprises a first parameter;

and the first parameter value included in the resource configuration information is the third preset value, and is used for indicating that the network equipment does not receive the HARQ-ACK information.
The method of claim 15, wherein the first indication information takes a first preset value for indicating that the network device does not receive the HARQ-ACK information, comprising:

the first preset value is mapped to resource configuration information corresponding to the first resource, and the resource configuration information does not comprise a first parameter;

the first parameter is not included in the resource configuration information and is used for indicating that the network equipment does not receive the HARQ-ACK information, and the first parameter is used for indicating whether the network equipment receives the HARQ-ACK information.
The method according to claims 12 to 20, characterized in that the method further comprises:

the network device does not receive an HARQ codebook, the HARQ codebook comprising a plurality of HARQ-ACK information, and the plurality of HARQ-ACK information are each determined to be not transmitted; or,

the network device receives an HARQ codebook, the HARQ codebook including a plurality of HARQ-ACK information, and at least one HARQ-ACK information among the plurality of HARQ information is not determined to be not transmitted.
A terminal device, comprising:

a receiving unit, configured to receive downlink control information DCI, where the DCI is scrambled by a group radio network temporary identifier G-RNTI, and the DCI is used to schedule a physical downlink shared channel PDSCH, and the DCI includes first indication information;

the processing unit determines not to send the HARQ-ACK information according to the first preset condition;

the first preset condition includes that the first indication information takes a first preset value, and the HARQ-ACK information is used for indicating a receiving state of the PDSCH.
The terminal device of claim 22, wherein the first indication information indicates first feedback time information, the first feedback time information being a number of time units from a time unit in which the PDSCH is located to a time unit in which the HARQ-ACK information is transmitted.
The terminal device of claim 23, wherein the first feedback time information belongs to a feedback time information set, the feedback time information set including at least one feedback time information, the at least one value of the first indication information being associated with at least one feedback time information in the feedback time information set;

the processing unit is specifically configured to: determining not to send the HARQ-ACK information according to the feedback time information value associated with the first preset value in the feedback time information set as a second preset value;

the feedback time information set is a set of the number of time units from the time unit where the PDSCH is located to the time unit where the HARQ-ACK information is sent.
The terminal device of claim 22, wherein the first indication information is configured to instruct the processing unit to send a first resource of the HARQ-ACK information, where the first resource belongs to a first resource set, the first resource set includes N resources, at least one value of the first indication information is associated with at least one resource in the resource set, and N is a positive integer greater than or equal to 1.
The terminal device of claim 25, wherein an mth value of the first indication information is associated with a resource in the first set of resources, wherein at least 1 resource in the first set of resources that is not mapped to the first set of resources is present from a 1 st value to a (M-1) th value of the first indication information, and M is greater than or equal to 2;

wherein, the processing unit is specifically configured to: and according to the resources which are not mapped to the resource set by the first preset value, determining not to send the HARQ-ACK information.
The terminal device of claim 25, wherein an i-th resource in the first set of resources is associated with an i+k-th value of the first indication information, i < N, k being greater than or equal to 1;

wherein, the processing unit is specifically configured to: and according to the j-th preset value, determining that the HARQ-ACK information is not transmitted, wherein j is more than or equal to 1 and k is more than or equal to k, and j and k are positive integers.
The terminal device according to claim 25, wherein the processing unit is specifically configured to:

the first preset value is mapped to resource configuration information corresponding to the first resource, and the resource configuration information comprises a first parameter;

and determining not to send the HARQ-ACK information according to the first parameter.
The terminal device according to claim 25, wherein the processing unit is specifically configured to:

the first preset value is mapped to resource configuration information corresponding to the first resource, and the resource configuration information comprises a first parameter;

and according to the first parameter value as a third preset value, determining not to send the HARQ-ACK information.
The terminal device according to claim 25, wherein the processing unit is specifically configured to:

the first preset value is mapped to resource configuration information corresponding to the first resource, and the resource configuration information does not comprise a first parameter;

and determining not to send the HARQ-ACK information according to the fact that the first parameter is not included in the resource configuration information, wherein the first parameter is used for indicating whether the processing unit sends the HARQ-ACK information or not.
The terminal device according to any of the claims 22 to 30, wherein the processing unit is further configured to:

in the case where the processing unit does not transmit the HARQ-ACK information, the processing unit does not save the HARQ-ACK information.
The method according to claims 22 to 30, wherein the processing unit is further adapted to:

An HARQ codebook is determined, wherein the HARQ codebook comprises a plurality of HARQ-ACK information, and the plurality of HARQ-ACK information corresponds to a plurality of PDSCHs.

When the plurality of HARQ-ACK information are all determined not to be transmitted, not transmitting the HARQ codebook; or,

and transmitting the HARQ codebook when at least one piece of HARQ-ACK information exists in the plurality of pieces of HARQ-ACK information and is not determined to be not transmitted.
A network device, comprising:

a processing unit, configured to determine that a terminal device does not send HARQ-ACK information, where the HARQ-ACK information is used to indicate a reception state of a physical downlink shared channel PDSCH;

a transmitting unit, configured to transmit downlink control information DCI, where the DCI is scrambled by a group radio network temporary identifier G-RNTI, and the DCI is used to schedule the PDSCH, and the DCI includes first indication information;

the first indication information takes a first preset value and is used for indicating the processing unit not to receive the HARQ-ACK information.
The network device of claim 33, wherein the first indication information indicates first feedback time information, the first feedback time information being a number of time units from a time unit in which the PDSCH is located to a time unit in which the HARQ-ACK information is transmitted.
The network device of claim 34, wherein the first feedback time information belongs to a set of feedback time information, the set of feedback time information including at least one feedback time information, the at least one value of the first indication information being associated with at least one feedback time information in the set of feedback time information;

the processing unit is specifically configured to: the feedback time information value associated with the first preset value in the feedback information set is the second preset value, and is used for indicating the processing unit not to receive the HARQ-ACK information;

the feedback time information set is a time unit number set between a time unit where the PDSCH is located and a time unit where the HARQ-ACK information is sent.
The network device of claim 33, wherein the first indication information is configured to instruct the terminal device to send a first resource of HARQ-ACK information, where the first resource belongs to a first resource set, the first resource set includes N resources, at least one value of the first indication information is associated with at least one resource in the first resource set, and N is a positive integer greater than or equal to 1.
The network device of claim 36, wherein an mth value of the first indication information is associated with a resource in the first set of resources, wherein at least 1 of the 1 st value to (M-1) th value of the first indication information is not mapped to a resource in the first set of resources, and M is greater than or equal to 2;

wherein, the processing unit is specifically configured to: the first preset value is not mapped to the resources in the first resource set and is used for indicating the processing unit not to receive the HARQ-ACK information.
The network device of claim 36, wherein an i-th resource in the first set of resources is associated with an i+k-th value of the first indication information, i < N, k being greater than or equal to 1;

wherein, the processing unit is specifically configured to: the first preset value is a j-th value and is used for indicating the processing unit not to receive the HARQ-ACK information, j is more than or equal to 1 and less than or equal to k, wherein j and k are both positive integers.
The network device of claim 36, wherein the processing unit is specifically configured to:

the first preset value is mapped to resource configuration information corresponding to the first resource, and the resource configuration information comprises a first parameter;

The first parameter is used to indicate that the processing unit does not receive the HARQ-ACK information.
The network device of claim 36, wherein the processing unit is specifically configured to:

the first preset value is mapped to resource configuration information corresponding to the first resource, and the resource configuration information comprises a first parameter;

and the first parameter value included in the resource configuration information is the third preset value, and is used for indicating the processing unit not to receive the HARQ-ACK information.
The network device of claim 36, wherein the processing unit is specifically configured to:

the first preset value is mapped to resource configuration information corresponding to the first resource, and the resource configuration information does not comprise a first parameter;

the first parameter is not included in the resource configuration information and is used for indicating that the processing unit does not receive the HARQ-ACK information, and the first parameter is used for indicating whether the processing unit receives the HARQ-ACK information.
The method of claims 33 to 41, wherein the processing unit is further configured to:

not receiving an HARQ codebook, the HARQ codebook including a plurality of HARQ-ACK information, and the plurality of HARQ-ACK information each determined to be not transmitted; or,

An HARQ codebook is received, the HARQ codebook including a plurality of HARQ-ACK information, and at least one HARQ-ACK information among the plurality of HARQ information is not determined to be not transmitted.
A terminal device comprising at least one processor and interface circuitry, the at least one processor being configured to perform the method of any one of claims 1 to 11.
A network device comprising at least one processor and interface circuitry, the at least one processor configured to perform the method of any one of claims 12 to 21.
A computer readable medium for storing a program which, when run by a processor, is adapted to perform the method of any one of claims 1 to 11 or the method of any one of claims 12 to 21.
A chip system, the chip system comprising:

a processor coupled with a memory for storing instructions;

the processor is configured to invoke and execute the instructions from the memory, so that a communication device on which the chip system is mounted performs the method according to any of claims 1 to 11 or the method according to any of claims 12 to 21.