CN115604846A

CN115604846A - Data transmission method and device

Info

Publication number: CN115604846A
Application number: CN202110775418.XA
Authority: CN
Inventors: 徐明慧; 刘凤威; 张佳胤
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2023-01-13

Abstract

The application provides a method and a device for data transmission, which comprise the following steps: the method comprises the following steps: the network equipment sends downlink control information DCI to the terminal equipment, wherein the DCI is used for scheduling at least one physical shared channel and comprises first information, and the first information is used for jointly indicating new data indication NDI information and redundancy version RV information of the at least one physical shared channel; and the network equipment performs data transmission with the terminal equipment according to the first information. According to the technical scheme of the application, through joint indication of NDI information and RV information of the physical shared channel, the load of DCI is reduced, and the coverage of the PDCCH is ensured.

Description

Data transmission method and device

Technical Field

The present application relates to the field of communications, and more particularly, to a method and apparatus for data transmission.

Background

In order to solve the increasing communication demand, high frequency (above 6G, mainly including 28G, 39G, 60G, 73G, etc.) is a hot spot for research and development in the industry due to its abundant spectrum resources. Especially, the spectrum of 52.6-71G has a significant characteristic of large bandwidth, and in order to fully utilize the spectrum resource and improve the peak rate or throughput, it is proposed in the industry that the bandwidth occupied by a single carrier is increased to about 2G or higher from 400M of the New Radio (NR) generation wireless communication system, and at the same time, the number of Fast Fourier Transform (FFT) points in the waveform modulation process is limited by the hardware of the terminal, and therefore, studies on large subcarrier intervals such as 240k, 480k, 960k and even 1920k are proposed.

However, increasing the subcarrier spacing results in a shorter time slot, which puts higher demands on the processing power of the terminal. A current solution is multi-slot scheduling, in which a control channel is detected/monitored/blindly detected in units of multi-slots, and a shared channel scheduled by the control channel is also detected in units of multi-slots in time, that is, a terminal can detect the control channel once in multiple slots, thereby reducing the complexity and power consumption of detection of the control channel.

When the multi-slot scheduling is applied to high-frequency single Downlink Control Information (DCI) to schedule a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH) of multiple slots, or a single DCI schedules multiple PDSCHs or PUSCHs, the load of the DCI is increased more, which causes coverage of the downlink physical control channel to be reduced.

Disclosure of Invention

The application provides a data transmission method and device, which are beneficial to reducing the load of DCI and ensuring the coverage of PDCCH.

In a first aspect, a method for data transmission is provided, including: the network equipment sends downlink control information DCI to the terminal equipment, wherein the DCI is used for scheduling at least one physical shared channel and comprises first information, and the first information is used for jointly indicating new data indication NDI information and redundancy version RV information of the at least one physical shared channel; and the network equipment performs data transmission with the terminal equipment according to the first information.

According to the technical scheme, the NDI information and the RV information of the physical shared channel are jointly indicated, the load of DCI is favorably reduced, and the coverage of the PDCCH is ensured.

And the network equipment performs data transmission with the terminal equipment according to the first information, wherein the data transmission comprises uplink data transmission and downlink data transmission. When uplink data is transmitted, the terminal equipment is a data sender, and the network equipment is a data receiver; when downlink data is transmitted, the network device is a data sender, and the terminal device is a data receiver.

With reference to the first aspect, in some implementations of the first aspect, when the NDI information indicates that the data of the physical shared channel is initially transmitted data, the RV of the initially transmitted data is a first subset in a first RV set; or when the NDI information indicates that the data of the physical shared channel is retransmission data, the RV of the retransmission data is a second subset in the first RV set; wherein the full set of the first subset and the second subset is a first RV set and the intersection of the first subset and the second subset is an empty set.

When the first subset and/or the second subset has one and only one element (i.e., only one RV), no additional information is needed to indicate a specific RV, so that the RV information indicated by NDI joint indication or implicit indication or indirect indication is all RV information at this time; when the number of elements of the first subset and/or the second subset is greater than 1 and less than or equal to 4, additional information is needed to indicate specific RV information in the subset, and at this time, the RV information indicated by NDI joint indication or implicit indication or indirect indication is partial RV information.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the network equipment sends a Radio Resource Control (RRC) message, wherein the RRC message is used for indicating a first RV set, and the first RV set comprises RVs corresponding to the RV information indicated by the first information.

With reference to the first aspect, in certain implementations of the first aspect, the RRC message is used to indicate multiple RV sets, and the method further includes: the network equipment sends Media Access Control (MAC) information, and the MAC information is used for indicating a first RV set in the multiple RV sets.

According to the technical scheme of the application, the information of the redundancy version set is sent through the RRC message and combined with the DCI information, so that the flexible configuration of the redundancy version and the reduction of the load indicated by the redundancy version can be realized at the same time.

With reference to the first aspect, in other implementation manners of the first aspect, the at least one physical shared channel includes multiple physical shared channels, and the first information is further used to indicate that data of the multiple physical shared channels are initial transmission data or retransmission data at the same time. Wherein the size of the first information is 1 bit.

With reference to the first aspect, in other implementation manners of the first aspect, the DCI further includes second information, where the second information is used to indicate a HARQ process of a first physical shared channel of the multiple physical shared channels.

With reference to the first aspect, in other implementation manners of the first aspect, when the data of the multiple physical shared channels are all initial transmission data, the HARQ processes of the physical shared channels for initial transmission data, except for the first HARQ process of the physical shared channel for initial transmission data, sequentially add one to the HARQ processes based on the indication.

Further, because the HARQ processes are not increased without limit, in the current NR protocol, the total number of HARQ processes is 32, 16, or 64, that is, the value range of the HARQ processes is 0 to 32, 0 to 15, or 0 to 63, when the number of PDSCH transmitted exceeds 32 (or 16 or 64), counting from 0 is started again, and the cycle is performed according to the rule. For example, assuming that the set of HARQ processes corresponding to the retransmission is an empty set, the HARQ process of the (i + 1) th scheduled physical shared channel may be mod (a + i, M), where a is the HARQ process indicated by the second information, and M is the total number of HARQ processes, such as 32, 16, or 64.

With reference to the first aspect, in other implementation manners of the first aspect, when all data of the multiple physical shared channels are retransmission data, HARQ processes of physical shared channels other than a first physical shared channel in the multiple physical shared channels are sequentially determined from the retransmission HARQ process set according to a time order.

According to the technical scheme of the application, when a plurality of physical shared channels scheduled by a single DCI are all used for initial transmission or retransmission data, one bit is added to jointly indicate that all the physical shared channels scheduled by the DCI are all used for initial transmission or retransmission data, an NDI domain corresponding to each physical shared channel is replaced, and the number of NDI indicating bits of the physical shared channels is obviously reduced.

With reference to the first aspect, in still other implementation manners of the first aspect, the at least one physical shared channel includes multiple physical shared channels, where the multiple physical shared channels include a physical shared channel used for initially transmitting data and a physical shared channel used for retransmitting data, and the DCI further includes third information, where the third information is used to indicate a number of physical shared channels used for retransmitting data.

Optionally, the third information may also be used to indicate the number of physical shared channels used for initially transmitting data. In this way, the number of physical shared channels used for retransmitting data can also be known by calculation.

With reference to the first aspect, in still other implementation manners of the first aspect, the DCI further includes fourth information, where the fourth information is used to indicate a HARQ process of a first physical shared channel of physical shared channels used for retransmitting data.

With reference to the first aspect, in still other implementations of the first aspect, HARQ processes of other physical shared channels for retransmitting data, except for a first HARQ process of a physical shared channel for retransmitting data, are sequentially determined in time order from a set of retransmission HARQ processes; and after the HARQ process of the first physical shared channel for the initially transmitted data is the indicated HARQ process and is not contained in the first HARQ process in the retransmission HARQ process set, sequentially adding one to the HARQ processes of the other physical shared channels for the initially transmitted data except the first physical shared channel for the initially transmitted data based on the HARQ process of the first initially transmitted physical shared channel.

The HARQ processes of other physical shared channels for initially transmitted data may be represented by a formula mod (a + k, M), where a is the HARQ process indicated by the fourth information, and M is the total number of HARQ processes, for example, 32, 16, or 64, k is the smallest positive integer such that mod (a + k, M) does not belong to the HARQ process set corresponding to the retransmission.

According to the technical scheme of the application, the physical shared channels for retransmission and the physical shared channels for initial transmission in the multiple physical shared channels scheduled by the single DCI are redefined, the physical shared channels for retransmission or initial transmission are transmitted in a centralized manner, the number of the physical shared channels for retransmission in the multiple physical shared channels scheduled by the single DCI is increased in the DCI, and the NDI indication bit number of the multiple physical shared channels is obviously reduced by replacing the NDI domain corresponding to each physical shared channel, the responsibility of the DCI is reduced, and the coverage of the PDCCH is improved.

With reference to the first aspect, in still other implementation manners of the first aspect, one or more codewords of the at least one physical shared channel share the first information, or the first information is applied to multiple codewords of the at least one physical shared channel.

With reference to the first aspect, in still other implementation manners of the first aspect, the plurality of codewords include a first codeword and a second codeword, and the DCI further includes fifth information indicating a differential value of a modulation and coding scheme, MCS, value of the second codeword and an MCS value of the first codeword.

The step value of the difference value is a fixed value or a non-fixed value.

For example, the differential value may be nxaamcs, or SUM _i＝0,…,N (ΔMCS _i ) Where N is a non-negative integer, and the larger i is, the larger Δ MCS _i The larger the absolute value of (c).

According to the technical scheme of the application, when the physical shared channel scheduled by the DCI comprises a plurality of code words, a field is added in the DCI for indicating NDI information of the plurality of code words of the physical shared channel, and replaces the NDI field corresponding to each code word, so that the number of NDI indicating bits of the plurality of code words is obviously reduced, further, the MCS of the second code word can be indicated by the MCS value of the first code word and the difference value between the two MCS values, the load of the DCI can be further reduced, and the coverage of the PDCCH is improved.

In a second aspect, a method for data transmission is provided, including: the terminal equipment receives Downlink Control Information (DCI) from the network equipment, wherein the DCI is used for scheduling at least one physical shared channel and comprises first information, and the first information is used for jointly indicating New Data Indication (NDI) information and Redundancy Version (RV) information of the at least one physical shared channel; and the terminal equipment performs data transmission with the network equipment according to the first information.

According to the technical scheme of the application, through joint indication of NDI information and RV information of the physical shared channel, the load of DCI is reduced, and the coverage of the PDCCH is ensured.

With reference to the second aspect, in some implementations of the second aspect, when the NDI information indicates that the data of the physical shared channel is initially transmitted data, the RV of the initially transmitted data is a first subset in the first RV set; or when the NDI information indicates that the data of the physical shared channel is retransmission data, the RV of the retransmission data is a second subset in the first RV set; wherein the full set of the first subset and the second subset is a first RV set, and the intersection of the first subset and the second subset is an empty set.

When the first subset and/or the second subset has one and only one element (i.e. only one RV is included), no additional information is needed to indicate a specific RV, so that the RV information indicated by NDI joint indication or implicit indication or indirect indication is all RV information at this time; when the number of elements of the first subset and/or the second subset is greater than 1 and less than or equal to 4, additional information is needed to indicate specific RV information in the subset, and at this time, the RV information indicated by NDI joint indication or implicit indication or indirect indication is partial RV information.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the terminal device receives a Radio Resource Control (RRC) message from the network device, wherein the RRC message is used for indicating a first RV set, and the first RV set comprises RVs corresponding to the RV information indicated by the first information.

With reference to the second aspect, in some implementations of the second aspect, the RRC message is used to indicate multiple RV sets, and the method further includes: the terminal equipment receives Media Access Control (MAC) information, and the MAC information is used for indicating a first RV set in the multiple RV sets.

With reference to the second aspect, in other implementation manners of the second aspect, the at least one physical shared channel includes multiple physical shared channels, and the first information is further used to indicate that data of the multiple physical shared channels are initial transmission data or retransmission data. Wherein the first information is 1 bit.

With reference to the second aspect, in other implementation manners of the second aspect, the DCI further includes second information, where the second information is used to indicate a HARQ process of a first physical shared channel of the multiple physical shared channels.

With reference to the second aspect, in other implementation manners of the second aspect, when the data of the multiple physical shared channels are all initial transmission data, the HARQ processes of the physical shared channels for initial transmission data, except for the first HARQ process of the physical shared channel for initial transmission data, sequentially add one to the HARQ processes based on the indication.

With reference to the second aspect, in other implementations of the second aspect, when the data of the multiple physical shared channels are all retransmission data, HARQ processes of other physical shared channels for retransmitting data except for a first HARQ process of a physical shared channel for retransmitting data are sequentially determined from the retransmission HARQ process set according to a time order.

With reference to the second aspect, in still other implementation manners of the second aspect, the at least one physical shared channel includes a plurality of physical shared channels, the plurality of physical shared channels includes a physical shared channel used for initially transmitting data and a physical shared channel used for retransmitting data, and the DCI further includes third information, where the third information is used to indicate a number of physical shared channels used for retransmitting data.

With reference to the second aspect, in still other implementation manners of the second aspect, the DCI further includes fourth information, where the fourth information is used to indicate a HARQ process of a first physical shared channel of physical shared channels used for retransmitting data.

With reference to the second aspect, in further implementation manners of the second aspect, HARQ processes of other physical shared channels for retransmitting data, except for a first HARQ process of the physical shared channel for retransmitting data, are sequentially determined from a retransmission HARQ process set according to a time order; and the HARQ processes of the physical shared channels for the initial transmission data except the HARQ process of the first physical shared channel for the initial transmission data are sequentially added by one based on the HARQ process of the first physical shared channel for the initial transmission data.

With reference to the second aspect, in still other implementation manners of the second aspect, one or more codewords of the at least one physical shared channel share the first information, or the first information is applied to multiple codewords of the at least one physical shared channel.

With reference to the second aspect, in still other implementations of the second aspect, the plurality of codewords include a first codeword and a second codeword, and the DCI further includes fifth information indicating a differential value of a modulation and coding scheme, MCS, value of the second codeword and an MCS value of the first codeword.

The step value of the difference value is a fixed value or a non-fixed value.

For example, the differential value may be nxaamcs, or SUM _i＝0,…,N (ΔMCS _i ) Wherein N is a non-negative integer, and the larger i is, the larger Δ MCS is _i The larger the absolute value of (a).

In a third aspect, a method for data transmission is provided, including: the network equipment sends downlink control information DCI to the terminal equipment, wherein the DCI is used for scheduling at least one physical shared channel and comprises first information, and the first information is used for jointly indicating new data indication NDI information and redundancy version RV information of the at least one physical shared channel; and the network equipment performs data transmission with the terminal equipment according to the first information.

With reference to the third aspect, in some implementations of the third aspect, when the NDI information indicates that the data of the physical shared channel is initially transmitted data, the RV of the initially transmitted data is a first subset in the first RV set; or when the NDI information indicates that the data of the physical shared channel is retransmission data, the RV of the retransmission data is a second subset in the first RV set; wherein the full set of the first subset and the second subset is a first RV set, and the intersection of the first subset and the second subset is an empty set.

With reference to the third aspect, in certain implementations of the third aspect, the method further includes: the network equipment sends a Radio Resource Control (RRC) message, wherein the RRC message is used for indicating a first RV set, and the first RV set comprises RVs corresponding to the RV information indicated by the first information.

With reference to the third aspect, in some implementations of the third aspect, the RRC message is used to indicate a plurality of RV sets, and the method further includes: the network equipment sends Media Access Control (MAC) information, and the MAC information is used for indicating a first RV set in the plurality of RV sets.

In a fourth aspect, a method for data transmission is provided, including: the terminal equipment receives downlink control information DCI from the network equipment, wherein the DCI is used for scheduling at least one physical shared channel and comprises first information, and the first information is used for jointly indicating new data indication NDI information and redundancy version RV information of the at least one physical shared channel; and the terminal equipment performs data transmission with the network equipment according to the first information.

And the terminal equipment performs data transmission with the network equipment according to the first information, wherein the data transmission comprises uplink data transmission and downlink data transmission. When uplink data is transmitted, the terminal equipment is a data sender, and the network equipment is a data receiver; when downlink data is transmitted, the network device is a data sender, and the terminal device is a data receiver.

With reference to the fourth aspect, in some implementations of the fourth aspect, when the NDI information indicates that the data of the physical shared channel is initially transmitted data, the RV of the initially transmitted data is a first subset in the first RV set; or when the NDI information indicates that the data of the physical shared channel is retransmission data, the RV of the retransmission data is a second subset in the first RV set; wherein the full set of the first subset and the second subset is a first RV set, and the intersection of the first subset and the second subset is an empty set.

With reference to the fourth aspect, in some implementations of the fourth aspect, the method further includes: the terminal device receives a Radio Resource Control (RRC) message from the network device, wherein the RRC message is used for indicating a first RV set, and the first RV set comprises RVs corresponding to the RV information indicated by the first information.

With reference to the fourth aspect, in some implementations of the fourth aspect, the RRC message is used to indicate a plurality of RV sets, and the method further includes: the terminal equipment determines a first RV set in the plurality of RV sets through a media access control MAC.

In a fifth aspect, a method for data transmission is provided, including: the network equipment sends downlink control information DCI to the terminal equipment, wherein the DCI is used for scheduling a plurality of physical shared channels and comprises first information, and the first information is used for jointly indicating new data indication NDI information and/or redundancy version RV information of the plurality of physical shared channels; and the network equipment performs data transmission with the terminal equipment according to the first information.

With reference to the fifth aspect, in some implementations of the fifth aspect, the first information is used to indicate that the data of the multiple physical shared channels are all initial transmission data or retransmission data. Wherein the first information is 1 bit.

With reference to the fifth aspect, in some implementations of the fifth aspect, the DCI further includes second information indicating a HARQ process of a first physical shared channel of the multiple physical shared channels.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, when the data of the multiple physical shared channels are all initial transmission data, the HARQ processes of the physical shared channels for initial transmission data, except for the first HARQ process of the physical shared channel for initial transmission data, sequentially add one to the HARQ processes based on the indication.

With reference to the fifth aspect, in some implementations of the fifth aspect, when the data of the multiple physical shared channels are all retransmission data, HARQ processes of other physical shared channels for retransmitting data except for a first physical shared channel HARQ process for retransmitting data are sequentially determined from the retransmission HARQ process set according to a time order.

According to the technical scheme of the application, when a plurality of physical shared channels scheduled by a single DCI are all used for initial transmission or retransmission data, one bit is added to jointly indicate that all the physical shared channels scheduled by the DCI are all used for initial transmission or retransmission data, an NDI domain corresponding to each physical shared channel is replaced, and the number of NDI indication bits of the physical shared channels is obviously reduced.

In a sixth aspect, a method for data transmission is provided, including: the terminal equipment receives Downlink Control Information (DCI) from the network equipment, wherein the DCI is used for scheduling a plurality of physical shared channels and comprises first information, and the first information is used for jointly indicating New Data Indication (NDI) information and/or Redundancy Version (RV) information of the plurality of physical shared channels; and the terminal equipment performs data transmission with the network equipment according to the first information.

The terminal device performs data transmission with the network device according to the first information, wherein the data transmission includes uplink data transmission and downlink data transmission. When uplink data is transmitted, the terminal equipment is a data sender, and the network equipment is a data receiver; when downlink data is transmitted, the network device is a data sender, and the terminal device is a data receiver.

With reference to the sixth aspect, in some implementations of the sixth aspect, the first information is further used to indicate that the data of the multiple physical shared channels are all initial transmission data or retransmission data. Wherein the first information is 1 bit.

With reference to the sixth aspect, in some implementations of the sixth aspect, the DCI further includes second information indicating a HARQ process of a first physical shared channel of the multiple physical shared channels.

With reference to the sixth aspect, in some implementations of the sixth aspect, when the data of the multiple physical shared channels are all initially transmitted data, the HARQ processes of the physical shared channels for initially transmitted data, except for the first HARQ process of the physical shared channel for initially transmitted data, sequentially add one to the HARQ processes based on the indication.

With reference to the sixth aspect, in some implementations of the sixth aspect, when the data of the multiple physical shared channels are all retransmission data, HARQ processes of other physical shared channels used for retransmitting data except for the first physical shared channel HARQ process used for retransmitting data are sequentially determined from the retransmission HARQ process set according to a time order.

In a seventh aspect, a method for data transmission is provided, including: the network equipment sends downlink control information DCI to the terminal equipment, wherein the DCI is used for scheduling a plurality of physical shared channels and comprises first information, and the first information is used for jointly indicating new data indication NDI information and/or redundancy version RV information of the plurality of physical shared channels; and the network equipment performs data transmission with the terminal equipment according to the first information.

With reference to the seventh aspect, in some implementations of the seventh aspect, the multiple physical shared channels include a physical shared channel used for initially transmitting data and a physical shared channel used for retransmitting data, and the DCI further includes third information, where the third information is used to indicate a number of physical shared channels used for retransmitting data.

With reference to the seventh aspect, in some implementations of the seventh aspect, the DCI further includes fourth information, where the fourth information is used to indicate a HARQ process of a first physical shared channel of physical shared channels used for retransmitting data.

With reference to the seventh aspect, in some implementations of the seventh aspect, HARQ processes of other physical shared channels used for retransmitting data, except for a first physical shared channel HARQ process used for retransmitting data, are sequentially determined in time order from a retransmission HARQ process set; and the HARQ processes of the physical shared channels for the initial transmission data except the HARQ process of the first physical shared channel for the initial transmission data are sequentially added by one based on the HARQ process of the first physical shared channel for the initial transmission data.

In an eighth aspect, a method for data transmission is provided, including: the terminal equipment receives Downlink Control Information (DCI) from the network equipment, wherein the DCI is used for scheduling a plurality of physical shared channels and comprises first information, and the first information is used for jointly indicating New Data Indication (NDI) information and/or Redundancy Version (RV) information of the plurality of physical shared channels; and the terminal equipment performs data transmission with the network equipment according to the first information.

With reference to the eighth aspect, in some implementations of the eighth aspect, the multiple physical shared channels include a physical shared channel used for initially transmitting data and a physical shared channel used for retransmitting data, and the DCI further includes third information, where the third information is used to indicate a number of physical shared channels used for retransmitting data.

With reference to the eighth aspect, in some implementations of the eighth aspect, the DCI further includes fourth information, where the fourth information is used to indicate a HARQ process of a first physical shared channel of physical shared channels used for retransmitting data.

With reference to the eighth aspect, in some implementations of the eighth aspect, HARQ processes of other physical shared channels for retransmitting data, except for a first HARQ process of a physical shared channel for retransmitting data, are sequentially determined from a retransmission HARQ process set according to a time order; and the HARQ processes of the physical shared channels for the initial transmission data except the HARQ process of the first physical shared channel for the initial transmission data are sequentially added by one based on the HARQ process of the first physical shared channel for the initial transmission data.

The HARQ processes of other physical shared channels for initially transmitted data may be represented by a formula mod (a + k, M), where a is an HARQ process indicated by the fourth information, and M is the total number of HARQ processes, for example, 32, 16, or 64, k is a minimum positive integer such that mod (a + k, M) does not belong to the set of HARQ processes corresponding to retransmission.

According to the technical scheme of the application, the physical shared channels for retransmission and the physical shared channels for initial transmission in the multiple physical shared channels scheduled by the single DCI are redefined, the physical shared channels for retransmission or initial transmission are transmitted in a centralized manner, the number of the physical shared channels for retransmission in the multiple physical shared channels scheduled by the single DCI is indicated by adding domains in the DCI, and the NDI indication bit number corresponding to each physical shared channel is replaced, so that the NDI indication bit number of the multiple physical shared channels is remarkably reduced, the responsibility of the DCI is reduced, and the coverage of the PDCCH is improved.

In a ninth aspect, a method for data transmission is provided, which includes: the network equipment sends downlink control information DCI to the terminal equipment, wherein the DCI is used for scheduling at least one physical shared channel and comprises first information, and the first information is used for jointly indicating new data indication NDI information and redundancy version RV information of the at least one physical shared channel; and the network equipment performs data transmission with the terminal equipment according to the first information.

With reference to the ninth aspect, in some implementations of the ninth aspect, one or more codewords of the at least one physical shared channel share the first information, or the first information is applied to multiple codewords of the at least one physical shared channel.

With reference to the ninth aspect, in some implementations of the ninth aspect, the plurality of codewords include a first codeword and a second codeword, and the DCI further includes fifth information indicating a differential value of a modulation and coding scheme, MCS, value of the second codeword and an MCS value of the first codeword.

The step value of the difference value is a fixed value or a non-fixed value.

According to the technical scheme of the application, when the physical shared channel scheduled by the DCI comprises a plurality of code words, a field is added in the DCI for indicating NDI information of the plurality of code words of the physical shared channel, and replaces the NDI field corresponding to each code word, so that the number of NDI indicating bits of the plurality of code words is obviously reduced, further, the second code word can be indicated by the MCS value of the first code word and the difference value between the two MCS values, the load of the DCI can be further reduced, and the coverage of the PDCCH is improved.

In a tenth aspect, a method for data transmission is provided, including: the terminal equipment receives Downlink Control Information (DCI) from the network equipment, wherein the DCI is used for scheduling at least one physical shared channel and comprises first information, and the first information is used for jointly indicating New Data Indication (NDI) information and Redundancy Version (RV) information of the at least one physical shared channel; and the terminal equipment performs data transmission with the network equipment according to the first information.

With reference to the tenth aspect, in some implementations of the tenth aspect, one or more codewords of the at least one physical shared channel share the first information, or the first information is applied to multiple codewords of the at least one physical shared channel.

With reference to the tenth aspect, in certain implementations of the tenth aspect, the plurality of codewords include a first codeword and a second codeword, and the DCI further includes fifth information indicating a differential value of a modulation and coding scheme, MCS, value of the second codeword and an MCS value of the first codeword.

The step value of the difference value is a fixed value or a non-fixed value.

In an eleventh aspect, an apparatus for data transmission is provided, including: a receiving and sending unit, configured to send downlink control information DCI to a terminal device, where the DCI is used to schedule at least one physical shared channel, and the DCI includes first information used to jointly indicate new data indication NDI information and redundancy version RV information of the at least one physical shared channel; and the transceiving unit is also used for carrying out data transmission with the terminal equipment according to the first information.

The processing unit is used for completing generation, coding, modulation, mapping and the like of downlink data, demodulating, decoding and the like of uplink data according to the first information.

With reference to the eleventh aspect, in certain implementations of the eleventh aspect, when the NDI information indicates that the data of the physical shared channel is initially transmitted data, the RV of the initially transmitted data is a first subset of a first RV set; or when the NDI information indicates that the data of the physical shared channel is retransmission data, the RV of the retransmission data is a second subset in the first RV set; wherein the full set of the first subset and the second subset is a first RV set, and the intersection of the first subset and the second subset is an empty set.

With reference to the eleventh aspect, in some implementations of the eleventh aspect, the transceiving unit is further configured to send a radio resource control RRC message to the terminal device, where the RRC message is used to indicate a first RV set, and the first RV set includes an RV corresponding to RV information indicated by the first information.

With reference to the eleventh aspect, in some implementations of the eleventh aspect, the RRC message is configured to indicate a plurality of RV sets, and the transceiver unit is further configured to send media access control MAC information to the terminal device, where the MAC information is used to indicate a first RV set in the plurality of RV sets.

With reference to the eleventh aspect, in other implementations of the eleventh aspect, the at least one physical shared channel includes multiple physical shared channels, and the first information is further used to indicate that the data of the multiple physical shared channels are all initial transmission data or retransmission data.

With reference to the eleventh aspect, in other implementations of the eleventh aspect, the DCI further includes second information indicating a HARQ process of a first physical shared channel of the multiple physical shared channels.

With reference to the eleventh aspect, in other implementation manners of the eleventh aspect, when the data of the multiple physical shared channels are all initial transmission data, the HARQ processes of the physical shared channels for initial transmission data, except for the first HARQ process of the physical shared channel for initial transmission data, sequentially add one to the HARQ processes based on the indication.

With reference to the eleventh aspect, in other implementations of the eleventh aspect, when the data of the multiple physical shared channels are all retransmission data, HARQ processes of other physical shared channels for retransmitting data except the first HARQ process for retransmitting data are sequentially determined from the retransmission HARQ process set according to a time order.

With reference to the eleventh aspect, in still other implementation manners of the eleventh aspect, the at least one physical shared channel includes a plurality of physical shared channels, the plurality of physical shared channels includes a physical shared channel used for initial transmission of data and a physical shared channel used for retransmission of data, and the DCI further includes third information, and the third information is used for indicating the number of physical shared channels used for retransmission of data.

With reference to the eleventh aspect, in still other implementation manners of the eleventh aspect, the DCI further includes fourth information, where the fourth information is used to indicate a HARQ process of a first physical shared channel of physical shared channels used for retransmitting data.

With reference to the eleventh aspect, in still other implementations of the eleventh aspect, HARQ processes of other physical shared channels for retransmitting data, except for the first HARQ process of the physical shared channel for retransmitting data, are sequentially determined from the set of retransmission HARQ processes in time order; and the HARQ processes of the physical shared channels for the initial transmission data except the HARQ process of the first physical shared channel for the initial transmission data are sequentially added by one based on the HARQ process of the first physical shared channel for the initial transmission data.

With reference to the eleventh aspect, in still other implementations of the eleventh aspect, one or more codewords of the at least one physical shared channel share the first information, or the first information is applied to multiple codewords of the at least one physical shared channel.

With reference to the eleventh aspect, in still other implementations of the eleventh aspect, the plurality of codewords include a first codeword and a second codeword, and the DCI further includes fifth information indicating a differential value of a modulation and coding scheme, MCS, value of the second codeword and an MCS value of the first codeword.

Wherein, the step value of the difference value is a fixed value or a non-fixed value.

In a twelfth aspect, an apparatus for data transmission is provided, including: a receiving and sending unit, configured to receive downlink control information DCI from a network device, where the DCI is used to schedule at least one physical shared channel, and the DCI includes first information, and the first information is used to jointly indicate new data indication NDI information and redundancy version RV information of the at least one physical shared channel; and the transceiving unit is further used for carrying out data transmission with the network equipment according to the first information.

The processing unit is used for completing generation, coding, modulation, mapping and the like of uplink data, demodulating, decoding and the like of downlink data according to the first information.

With reference to the twelfth aspect, in some implementations of the twelfth aspect, when the NDI information indicates that the data of the physical shared channel is initially transmitted data, an RV of the initially transmitted data is a first subset of a first RV set; or when the NDI information indicates that the data of the physical shared channel is retransmission data, the RV of the retransmission data is a second subset in the first RV set; wherein the full set of the first subset and the second subset is the first RV set, and the intersection of the first subset and the second subset is an empty set.

With reference to the twelfth aspect, in some implementations of the twelfth aspect, the transceiver unit is further configured to receive a radio resource control RRC message from the network device, where the RRC message is used to indicate the first RV set, and the first RV set includes an RV corresponding to RV information indicated by the first information.

With reference to the twelfth aspect, in some implementations of the twelfth aspect, the RRC message is configured to indicate multiple RV sets, the processing unit is further configured to receive media access control MAC information, and the processing unit is further configured to determine the first RV set of the multiple RV sets according to the media access control MAC information.

With reference to the twelfth aspect, in other implementation manners of the twelfth aspect, the at least one physical shared channel includes multiple physical shared channels, and the first information is further used to indicate that the data of the multiple physical shared channels are the initial transmission data or the retransmission data at the same time.

With reference to the twelfth aspect, in other implementation manners of the twelfth aspect, the DCI further includes second information, where the second information is used to indicate a HARQ process of a first physical shared channel of the multiple physical shared channels.

With reference to the twelfth aspect, in other implementation manners of the twelfth aspect, when the data of the multiple physical shared channels are the initial transmission data, the HARQ processes of the other physical shared channels used for the initial transmission data, except for the first HARQ process of the physical shared channel used for the initial transmission data, are sequentially incremented by one based on the indicated HARQ process.

With reference to the twelfth aspect, in other implementation manners of the twelfth aspect, when the data of the multiple physical shared channels are the retransmission data, HARQ processes of other physical shared channels used for retransmitting the data except for a first HARQ process of a physical shared channel used for retransmitting the data are sequentially determined in time order from a retransmission HARQ process set.

With reference to the twelfth aspect, in further implementation manners of the twelfth aspect, the at least one physical shared channel includes a plurality of physical shared channels, the plurality of physical shared channels includes a physical shared channel used for initially transmitting data and a physical shared channel used for retransmitting data, and the DCI further includes third information, where the third information is used to indicate the number of physical shared channels used for retransmitting data.

With reference to the twelfth aspect, in still other implementation manners of the twelfth aspect, the DCI further includes fourth information, where the fourth information is used to indicate a HARQ process of a first physical shared channel of the physical shared channels used for retransmitting data.

With reference to the twelfth aspect, in still other implementations of the twelfth aspect, HARQ processes of other physical shared channels for retransmitting data, except for the HARQ process of the first physical shared channel for retransmitting data, are sequentially determined from the retransmission HARQ process set according to a time order; and the HARQ process of the first physical shared channel for the initial transmission data is the first HARQ process which is not included in the retransmission HARQ process set after the indicated HARQ process, and the HARQ processes of the other physical shared channels for the initial transmission data except the HARQ process of the first physical shared channel for the initial transmission data are sequentially added by one based on the HARQ process of the first physical shared channel for the initial transmission data.

With reference to the twelfth aspect, in still other implementation manners of the twelfth aspect, one or more codewords of the at least one physical shared channel share the first information, or the first information is applied to multiple codewords of the at least one physical shared channel.

With reference to the twelfth aspect, in still other implementations of the twelfth aspect, the plurality of codewords include a first codeword and a second codeword, and the DCI further includes fifth information indicating a differential value of a modulation and coding scheme, MCS, value of the second codeword and an MCS value of the first codeword.

In a thirteenth aspect, a communication apparatus is provided, including: a processor configured to perform the method as in any one of the first to tenth aspects and its various implementations.

In a fourteenth aspect, a communication apparatus is provided, including: a processor coupled with the memory, the memory for storing a program or instructions that, when executed by the processor, cause the apparatus to implement the method as in any one of the first to tenth aspects and its various implementations.

Optionally, the number of the processors is one or more, and the number of the memories is one or more.

Alternatively, the memory may be integrated with the processor or provided separately from the processor.

In a fifteenth aspect, a communication system is provided that includes a terminal device and a network device.

The network device is configured to implement the method in each implementation manner in the first, third, fifth, seventh and ninth aspects, and the terminal device is configured to implement the method in each implementation manner in the second, fourth, sixth, eighth and tenth aspects.

In a possible design, the communication system further includes other devices interacting with the communication device in the solution provided in the embodiment of the present application.

In a sixteenth aspect, a computer-readable medium is provided, which stores a computer program or instructions, which, when run on a computer, causes the computer to perform the method of the above-mentioned aspects.

In a seventeenth aspect, a computer program product is provided, the computer program product comprising: computer program or instructions, which, when run on a computer, causes the computer to perform the method of the above aspects.

It should be noted that all or part of the computer program or the instructions may be stored in the first storage medium, where the first storage medium may be packaged together with the processor or may be packaged separately from the processor, and this is not specifically limited in this embodiment of the present application.

In an eighteenth aspect, there is provided a chip system, comprising a memory for storing a computer program or instructions and a processor for calling and executing the computer program or instructions from the memory, so that a communication device in which the chip system is installed performs the method of any of the first to tenth aspects and possible implementations thereof.

The system-on-chip may include, among other things, an input chip or interface for transmitting information or data, and an output chip or interface for receiving information or data.

Drawings

Fig. 1 is a schematic diagram of a communication system 100 suitable for use in the present application.

Fig. 2 is a schematic diagram of a redundancy version suitable for use in the present application.

Fig. 3 is a schematic diagram of the slot spacing of different subcarrier spacings.

Fig. 4 is a schematic flowchart of an example of the data transmission method of the present application.

Fig. 5 is a diagram illustrating an example of HARQ process determination according to the present application.

Fig. 6 is a schematic flowchart of a specific example of the data transmission method of the present application.

Fig. 7 is a diagram illustrating an example of HARQ process indication during all retransmission or initial transmission according to the present application.

Fig. 8 is a diagram illustrating an example of HARQ process indication during partial retransmission according to the present application.

Fig. 9 is a schematic block diagram of an example of the data transmission device of the present application.

Fig. 10 is a schematic block diagram of an example of the data transmission device according to the present application.

Detailed Description

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

Fig. 1 is a schematic diagram of a communication system 100 suitable for use with embodiments of the present application.

As shown in fig. 1, the communication system 100 may include a network device 101 and a terminal device 102, and optionally, may further include a core network device 103. Wherein, the network device 101 can communicate with the core network device 103; the terminal apparatus 102 is capable of communicating with the network apparatus 101.

Terminal equipment in the embodiments of the present application may refer to user equipment, access terminals, subscriber units, subscriber stations, mobile stations, remote terminals, mobile devices, user terminals, wireless communication devices, user agents, or user devices. The terminal in the embodiment of the present application may be a mobile phone (mobile phone), a tablet (pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation security), a wireless terminal in smart city (smart city), a wireless terminal in PDA (smart home), a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local, l) station, a personal digital assistant (wldigital assistant), a wireless terminal with a wireless modem, a wireless modem connected to a wireless communication network, or other devices with a function of a future communication network, or a wireless network connected to a wireless communication network 5.

Wherein, wearable equipment also can be called as wearing formula smart machine, is the general term of using wearing formula technique to carry out intelligent design, developing the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

In addition, the terminal device may also be a terminal device in an internet of things (IoT) system. The IoT is an important component of future information technology development, and the main technical characteristic of the IoT is to connect objects with a network through a communication technology, so that an intelligent network with man-machine interconnection and object-object interconnection is realized. The specific form of the terminal device is not limited in the present application.

It should be understood that, in the embodiment of the present application, the terminal device may be an apparatus for implementing a function of the terminal device, and may also be an apparatus capable of supporting the terminal device to implement the function, for example, a system on a chip, and the apparatus may be installed in the terminal. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices.

The network device in the embodiment of the present application may be any device having a wireless transceiving function. Such devices include, but are not limited to: an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B or home Node B, HNB), a Base Band Unit (BBU), an Access Point (AP) in a wireless fidelity (WIFI) system, a wireless relay Node, a wireless backhaul Node, a Transmission Point (TP), a transmission point (TRP) in a wireless fidelity (BBU) system, and the like, and may also be 5G, such as NR, a gbb in a system, or a transmission point (TRP or TP), one or a group of base stations in a 5G system may include multiple antennas, may also include a Radio Network Controller (RNC), or a distributed Node B, such as a radio network controller (NB), and may also include a distributed antenna panel (NB), or a distributed Node B, or a distributed base station (pdu).

In some deployments, the gNB may include Centralized Units (CUs) and DUs.

The gNB may further include an Active Antenna Unit (AAU). The CU implements part of the function of the gNB and the DU implements part of the function of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implementing functions of a Radio Resource Control (RRC) layer and a Packet Data Convergence Protocol (PDCP) layer. The DU is responsible for processing a physical layer protocol and a real-time service, and implements functions of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer. The AAU implements part of the physical layer processing functions, radio frequency processing and active antenna related functions. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as the RRC layer signaling, may also be considered to be transmitted by the DU or by the DU + AAU under this architecture. It is to be understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into network devices in an access network (RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this application.

It should be understood that, in the embodiment of the present application, a network device may be an apparatus for implementing a function of the network device, and may also be an apparatus capable of supporting the network device to implement the function, for example, a system on chip, and the apparatus may be installed in the network device.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (GSM) systems, code Division Multiple Access (CDMA) systems, wideband Code Division Multiple Access (WCDMA) systems, general Packet Radio Service (GPRS), long term evolution (long term evolution, LTE) systems, LTE frequency division duplex (frequency division duplex, FDD) systems, LTE Time Division Duplex (TDD), universal mobile telecommunications system (universal mobile telecommunications system, UMTS), worldwide Interoperability for Microwave Access (WiMAX) communication systems, fifth generation (5, g) systems or systems, such as the Internet-6-vehicle (2-6) communication system, long term evolution-vehicle (2-6-vehicle (V-to-V) communication system, long term evolution-vehicle (2-V-2) communication system, long term evolution-vehicle (2-V-to-V) communication system, long term evolution (2-vehicle (V-to-V) communication system, long term evolution-vehicle (2-to-vehicle (V-to-V) communication system, etc.).

It should be noted that the wireless communication system shown in fig. 1 is only for more clearly explaining the technical solution of the present application, and does not constitute a limitation to the present application. As can be known to those skilled in the art, with the evolution of network architecture and the appearance of new service scenarios, as long as there is a situation that a single DCI schedules multiple slots or multiple PDSCH/PUSCH or double codewords in the communication system, in order to reduce the DCI load and ensure the coverage of the PDCCH, the technical solution provided in the present application is also applicable to similar technical problems.

It should also be understood that the present application is not limited to waveforms, and may also be applied to communication systems based on cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) or discrete fourier transform-spread orthogonal frequency division multiplexing (DFT-s-OFDM).

To facilitate understanding of the embodiments of the present application, the following explains a concept related to the embodiments of the present application.

1. Redundancy version (redundancy version, RV)

In the encoding process, original source bits (a bits) are encoded at a code rate of 1/3 to obtain mother codes (3A bits), and then partial bits (length is B, B is determined by an actual code rate and is about a/CodeRate, hereinafter, a coded bit set is substituted) are selected from the mother codes according to an actual code rate according to a certain rule as a final encoding result for modulation, mapping and the like. As shown in fig. 2, the shaded part is the original source bit, the whole ring is the mother code, and the part included by one arrow is the actual bit of a certain transmission. Wherein different arrows indicate different redundancy versions.

In the data transmission process, transmission errors of partial data are caused by channel conditions and the like, and at the moment, erroneous data packets need to be retransmitted, so that the data receiving integrity of a receiving end is ensured. The retransmission must send the same Code Block (CB) or Transport Block (TB) as the initial transmission, but a different set of coded bits may be selected for each retransmission, as long as the coded bits represent the same CB or TB. In the new generation wireless communication system NR, the soft combining scheme is divided into Chase Combining (CC) and Incremental Redundancy (IR) according to whether the retransmitted bit information is the same as that of the initial transmission. The retransmitted bit information in chase combining is the same as that in initial transmission (i.e., the same set of coded bits corresponding to the gray arrow is sent), and the retransmitted bit information in incremental redundancy does not need to be the same as that in initial transmission.

In chase combining, the sender adds Cyclic Redundancy Check (CRC) to the original information bits and encodes them to generate a set of coded bits, which is sent for both initial transmission and retransmission. Every retransmission information is the same as the initial transmission information, and the signal to noise ratio can be improved.

In incremental redundancy, each retransmission need not be the same as the initial transmission. Instead, multiple sets of coded bits are generated, each set carrying the same information. Whenever a retransmission is required, a different set of coded bits is typically transmitted than the previous one, and the receiving end combines the retransmitted data with the previously transmitted data. The set of coded bits for each retransmission is called an RV. Incremental redundancy transmits extra redundant information through retransmission, the redundant information is continuously accumulated along with the increase of retransmission times, and the channel coding efficiency is continuously reduced, so that a better decoding effect is obtained.

In conjunction with the above description, it can be seen from the figure that RV0 contains all systematic bits, RV3 contains most systematic bits, so the coded bit sets transmitted by RV0 and RV3 can support self-decoding, that is, when only RV0 or RV3 is transmitted, both have a high probability of recovering the original bits, and RV1 and RV2 contain most or all parity bits, so that they cannot be self-decoded, and must be combined with the coded bit sets of RV0 or RV3 to correctly decode.

2. Multi-slot scheduling

Scheduling of a shared channel, a detection period of a control channel, a hybrid automatic repeat request (HARQ) process, etc. in an existing NR system are all related to a subcarrier interval, for example, a scheduling unit of the shared channel is a time slot (14 OFDM symbols) or a mini-slot (2-13 OFDM symbols) in time, a duration of the time slot is determined by the subcarrier interval, and the larger the subcarrier interval is, the shorter the duration of the time slot is, as shown in fig. 3, where one rectangular box represents one time slot, and as can be seen from the figure, one time slot with 120k subcarriers may respectively include 2 time slots of 240k, 4 time slots of 480k, and 8 time slots of 960 k. The detection frequency of the control channel is also a time slot. Therefore, when the data subcarrier spacing is increased from 120k in the conventional NR system to 480k or 960k, the timeslot time corresponding to 480k or 960k is shortened to 1/4 or 1/8 of the timeslot time of 120k, and if the control channel is still detected in units of timeslots at this time, it is a great challenge to the processing capability of the terminal. Therefore, for the problem of shortening the time slot of the large subcarrier interval, one solution is multi-slot scheduling, and at this time, the shared channel and the control channel are both scheduled in units of multi-slots, that is, the terminal can detect the control channel once in multiple slots, so as to desirably reduce the complexity and power consumption of control channel detection.

At present, two methods for mapping transport blocks scheduled in multiple time slots are defined in the NR protocol, one is to transmit the same transport block multiple times in multiple time slots, and the other is to transmit multiple different transport blocks in multiple time slots. In the first method, the same transmission block has different redundancy versions in multiple transmissions, and a receiving end combines and demodulates multiple redundancy versions of the same transmission block to enhance coverage; the second method transmits a plurality of different transport blocks at a time, and can reduce the number of times of detecting Downlink Control Information (DCI) and maintain high throughput. When one DCI schedules a plurality of DCIs (e.g. N) _pusch And) PUSCH, and when different PUSCHs carry different TBs, there are several differences as follows compared with scheduling single PUSCH carrying a single TB:

(1) A New Data Indicator (NDI) field whose load is increased from 1 bit to N _pusch One bit: each bit corresponds to a PUSCH for indicating an initial transmission or a retransmission.

(2) Increasing the load of RV domain from 2 bits to N _pusch One bit: each bit corresponds to a PUSCH and is used for indicating the RV version of the PUSCH.

a) When scheduling a single PUSCH, the redundancy version of the TB of the single PUSCH may be any one of RV0 to RV3, and thus 2 bits are required to indicate the redundancy version, which is indicated as shown in table 1 below:

table 1 redundancy version situation table indicated when DCI schedules single PUSCH

Value of redundancy version field	Redundancy version RV of an application
		00	0
01	1
		10	2
11	3

b) When a plurality of PUSCHs are scheduled, in order to reduce the overall load of the RV domain, each PUSCH is changed into one bit to indicate a redundancy version, and specific indication information is shown in table 2 below:

table 2 redundancy version situation table indicated when DCI schedules multiple PUSCHs

Value of redundancy version field	Redundancy version RV of an application
		0	0
1	2

In addition, when the DCI schedules a single PDSCH and the single PDSCH carries multiple TBs, if the number of scheduling layers is greater than 4, two independent codewords need to be mapped on multiple layers, a first codeword is mapped on a front ceil (Nlayer/2), and a second codeword is mapped on a rear floor (Nlayer/2), where Nlayer is the number of scheduling layers, ceil (x) indicates rounding up to x, and floor (x) indicates rounding down to x.

The reason for introducing two code words when the number of scheduling layers is greater than 4 is that the quality of channels on different layers is different greatly, and one code word cannot be well matched with the channels on different layers, so that two modulation coding modes can be introduced through the two code words respectively to be matched with the channels with different qualities respectively. Therefore, compared with the DCI which schedules a single PDSCH and the number of scheduling layers is less than or equal to 4, the DCI format which schedules a single PDSCH and the number of scheduling layers is greater than 4 has the following changes:

(1) Modulation and Coding Scheme (MCS) indication fields are increased from 5 bits to 10 bits: each codeword or TB (one codeword for one TB in case of single PDSCH) corresponds to 5 bits for indicating MCS of each codeword.

(2) The NDI field is increased from 1 bit to 2 bits: each codeword or TB corresponds to a bit for indicating whether it is an initial transmission or a retransmission.

(3) The RV field is increased from 2 bits to 4 bits: each codeword or TB corresponds to 2 bits for indicating the redundancy version of the currently transmitted codeword or TB.

When the current NR protocol scheme is directly extended to a high-frequency single DCI for scheduling PDSCH or PUSCH of multiple slots, or a single DCI for scheduling multiple PDSCHs or PUSCHs, the DCI load may be increased more, which may cause a reduction in the coverage of the downlink physical control channel, for example, when a single DCI is used for scheduling a single PDSCH and a single code word is used as a reference, the increased loads when a single DCI is used for scheduling 8 PDSCH/PUSCH and/or scheduling a double code word are respectively shown in the following table:

TABLE 3 MCS/NDI/RV load indication table for different scenes

Scene	MCS	NDI	RV	Total of	Increase in
						Single PDSCH + single codeword	5bits	1bits	2bits	8bits	0bit
Single PDSCH + double code word	10bits	2bits	4bits	16bits	8bits
						8PDSCHs + single codeword per PDSCH	5bits	8bits	8bits	21bits	13bits
8PDSCHs + double code word for each PDSCH	10bits	16bits	16bits	42bits	34bits

Where "8" is the maximum number of single DCI scheduled PDSCHs allowed in the current NR protocol. As can be seen from the above table, the single DCI schedules multiple slots and/or the single DCI schedules dual code word (each PDSCH) all cause a load increase, and especially in a scenario of scheduling multiple PDSCH/PUSCH and dual code words simultaneously, assuming that the total load of the DCI is 100 bits, which increases a load of 30% + percent, under the same Physical Downlink Control Channel (PDCCH) resource, an equivalent code rate may increase, which causes a severe pressure on the coverage of the PDCCH.

Based on the method, a new data transmission indicating method is provided for a scene of scheduling multiple PDSCH/PUSCH and/or double code words by single DCI, the load of the DCI can be reduced, and the coverage of the PDCCH can be ensured.

The following describes an embodiment of the present application by taking the interaction between the network device 101 and the terminal device 102 as an example.

Fig. 4 shows a schematic flow chart of an example of the data transmission method of the present application.

S310, the network device 101 sends a downlink control information DCI, where the DCI includes first information, and the first information is used to jointly indicate new data indication NDI information and redundancy version RV information of at least one physical shared channel scheduled by the DCI.

It should be understood that, as the technology develops or the application scenario changes, the network device 101 may schedule the physical shared channel through other information or message form different from the DCI information, and therefore, the network device may also send the first information to the terminal device through other information, where the first information is used to jointly indicate the new data of the at least one physical shared channel to indicate the NDI information and the redundancy version RV information, and the form of the message or information is not limited in this application.

In a possible implementation manner of the embodiment of the present application, when the NDI information indicates that data of the physical shared channel is initially transmitted data, an RV of the initially transmitted data is a first subset in a first RV set; or when the NDI information indicates that the data of the physical shared channel is retransmission data, the RV of the retransmission data is a second subset in the first RV set; wherein the full set of the first subset and the second subset is a first RV set, and the intersection of the first subset and the second subset is an empty set.

When the first subset and/or the RV subset has only one element, no additional information is needed to indicate a specific RV, so that the RV information indicated by NDI joint indication or implicit indication or indirect indication is all RV information.

When the number of elements of the first subset and/or the second subset is greater than 1 and less than or equal to 4, additional information is needed to indicate specific RV information in the subset, and at this time, the RV information indicated by NDI joint indication or implicit indication or indirect indication is partial RV information.

Optionally, the method may further include: the network device 101 sends a radio resource control RRC message, where the RRC message is used to indicate a first RV set, and the first RV set includes an RV corresponding to the RV information indicated by the first information.

It should be understood that the network device 101 may also indicate the first RV set through other message forms different from the RRC message, which is not limited in this application.

Optionally, the RRC message may indicate a plurality of RV sets, and the method may further include: the network device 101 sends media access control MAC information to the terminal device 102, which is used to indicate a first RV set of the multiple RV sets.

It should be understood that the network device 101 may also indicate the first RV set of the multiple RV sets through other forms of information or messages.

In another possible implementation manner of the embodiment of the present application, the at least one physical shared channel includes a plurality of physical shared channels, and the first information is further used to indicate that data of the plurality of physical shared channels are all initial transmission data or retransmission data. Wherein the size of the first information is 1 bit.

The DCI may further include second information, where the second information is used to indicate an HARQ process of a first physical shared channel in the multiple physical shared channels.

Optionally, when the data of the multiple physical shared channels are all initially transmitted data, the HARQ processes of the physical shared channels for initially transmitted data, except the HARQ process of the first physical shared channel for initially transmitted data, are sequentially incremented based on the HARQ process of the first physical shared channel.

Optionally, when the data of the physical shared channels are all retransmission data, HARQ processes of other physical shared channels for retransmitting data except the first physical shared channel HARQ process for retransmitting data are sequentially determined from the retransmission HARQ process set according to a time order.

In yet another possible implementation manner of the embodiment of the present application, the at least one physical shared channel may further include a plurality of physical shared channels, and the plurality of physical shared channels may include a physical shared channel used for initially transmitting data and a physical shared channel used for retransmitting data, where the DCI may further include third information, and the third information is used to indicate the number of physical shared channels used for retransmitting data.

Optionally, the DCI may further include fourth information, where the fourth information is used to indicate a HARQ process of a first physical shared channel in the physical shared channels used for retransmitting data.

The HARQ processes of other physical shared channels used for retransmitting data except the HARQ process of the first physical shared channel used for retransmitting data are sequentially determined from the retransmission HARQ process set according to the time sequence; the HARQ process of the first physical shared channel used for the initial transmission data is the first HARQ process which is not included in the retransmission HARQ process set after the HARQ process of the first physical shared channel in the physical shared channels used for retransmitting the data, and the HARQ processes of the other physical shared channels used for the initial transmission data except the HARQ process of the first physical shared channel used for the initial transmission data are sequentially added by one based on the HARQ process of the first physical shared channel used for the initial transmission data.

As shown in fig. 5, the total number of HARQ processes is 32, and assuming that the HARQ process of the first physical shared channel in the physical shared channels for retransmitting data is HARQ 0, the HARQ process of the first physical shared channel for initially transmitting data is the first HARQ process in the retransmission HARQ process set that starts from HARQ 0 (excluding HARQ 0), and is not in or does not belong to a clockwise order.

In another possible implementation manner of the embodiment of the present application, one or more code words of the at least one physical shared channel share first information, or the first information is applied to a plurality of code words of the at least one physical shared channel.

The shared first information indicates that the NDI information and/or RV information of multiple codewords of the at least one physical shared channel is the same, and the first information may be used to indicate the NDI information and/or RV information of multiple codewords of the at least one physical shared channel at the same time.

Optionally, the multiple code words include a first code word and a second code word, and the DCI further includes fifth information, where the fifth information is used to indicate a differential value between a Modulation and Coding Scheme (MCS) value of the second code word and an MCS value of the first code word.

Alternatively, the step value of the difference value may be a fixed value or may not be a fixed value.

For example, the differential value may be N × Δ MCS, or N × Δ MCS, where N is a non-negative integer, and Δ MCS is increased as i is increased _i The larger the absolute value of (c).

S320, the network device 101 performs data transmission with the terminal device 102 according to the first information.

When the network device 101 and the terminal device 102 perform downlink data transmission, the network device sends data, the terminal device receives the data, that is, the network device 101 completes processing such as generation, encoding, modulation, mapping and the like of the downlink data according to the first information and then sends the processed data to the terminal device 102, and the terminal device 102 completes demodulation, decoding and HARQ information feedback of the received data according to the first information.

When the network device 101 and the terminal device 102 perform uplink data transmission, the terminal device sends data, the network device receives the data, that is, the terminal device 102 completes processing such as generation, encoding, modulation, mapping and the like of downlink data according to the first information and then sends the data to the network device 101, and the network device 101 completes demodulation, decoding and HARQ information feedback of the received data according to the first information.

Fig. 6 is a schematic flowchart showing a specific example of the data transmission method of the present application.

S401, the terminal device 102 receives an RRC message from the network device 101, where the RRC message includes RV version information.

Specifically, the network device 101 may add information in the configuration of PDSCH/PUSCH (PDSCH/PUSCH will be indicated simultaneously in a physical shared channel in the following): one or more RV sets (or lists) are defined, each RV set may contain 1 or 2 or 4 redundancy versions, when multiple RVs are contained, different RV sets may have different RVs, or the same RV redundancy version and different RV order. The RV set is exemplified below:

is provided with X _RV RV set { RVset } _{_0} ,RVset _{_1} ，……，RVset _{_XRV-1} }，X _RV Is a positive integer, wherein X _RV RV set i, i.e. RVset, of the RV sets _{_i} Containing 2 RVs, e.g. RVset _{_i} ＝{RV0，RV2}; RV set j, RVset _{_j} Containing 4 RVs, e.g. RVset _{_j} = { RV0, RV2, RV3, RV1}, RV set k is RVset _{_k} Containing 2 RVs, e.g. RVset _{_k} = { RV0, RV3}, RV set i is RVset _{_l} Containing 4 RVs, e.g. RVset _{_l} = { RV0, RV3, RV2, RV1}, where i, j, k, l satisfy 0<＝i、j、k、l<X _RV Is an integer of (1).

Optionally, the network device 101 may multiplex existing packets when defining the RV set (or list), for example, define one RV set for each row in a Time Domain Resource Allocation (TDRA) table, where a row in the TDRA table represents a kind of scheduling, and may include one or more physical shared channels, the number of scheduled physical shared channels may be determined by the number of Start and Length Indicator Values (SLIVs), each SLIV corresponds to the Time domain resource allocation condition of a physical shared channel in a slot, and the number of RVs in the RV set is related to the number of SLIVs of the row in the TDRA table. Preferably, the number of SLIVs is increased, and the number of RVs in the RV set is decreased, for example, when the number of SLIVs is 1, the RV set includes 4 RVs, when the number of SLIVs is greater than 1 and less than or equal to 4, the RV set includes 2 RVs, and when the number of SLIVs is greater than or equal to 4, the RV set includes 1 RV.

S402, the terminal device 102 receives DCI information sent by a network device, where the DCI information includes first information, and the first information is used to jointly indicate NDI information and/or RV information of at least one physical shared channel.

When X is present _RV =1, the specific RV information may be indicated directly or indirectly (displayed or implicit) by the DCI; alternatively, when X _RV >1, the network device 101 may activate one of the RV sets (which may be referred to as a first RV set) through a Medium Access Control (MAC), and then directly or indirectly (explicitly or implicitly) indicate specific RV information in the first RV set by the DCI. For example, the network device 101 activates the RV set i or RVset through MAC _{_i} = { RV0, RV2}, the DCI may be based on this RVset _{_i} Indicating that the specific RV is RV0 or RV2; as another example, the MAC activates RV set j or RVset as described above _{_j} ＝{RV0，RV2, RV3, RV1}, the DCI may be based on RVset _{_j} The specific RV is indicated as RV0 or RV2 or RV3 or RV1.

According to the technical scheme of the application, the information of the redundancy version set is sent through the RRC message and combined with the DCI information, so that flexible configuration of the redundancy version can be realized and the load of the indication of the redundancy version in the DCI can be reduced. For example, when the number of physical shared channels scheduled by a single DCI is N, and N is greater than 4, if there is only one RV in the first RV set, the DCI may save at least N bits (N × 2 bits may be reduced when the physical shared channels include double codewords) compared to the current NR protocol, and if there are two RVs in the first RV set, but the two RVs are associated with initial transmission and retransmission, respectively, there is the same benefit, that is, N RV indication bits are saved in a single codeword, which effectively reduces the load of the DCI.

Various situations of the present application will be described below according to different situations of the physical shared channel:

case 1:

in this case, the first information is used to jointly indicate NDI information and RV information of the physical shared channel. This situation will be described in detail below by taking as an example that part or all of the information of the RV is bound to NDI, which may be indicated indirectly or implicitly by NDI.

For example, when the number of RVs to be selected or confirmed is 4, such as the determined first RV set includes 4 RVs, the RVs may be divided into two groups, group 1 and group 2, where an NDI indicates that data of one physical shared channel is initial transmission data, then the RV of the physical shared channel can only be one of group 1, and an NDI indicates that data of the physical shared channel is retransmission data, then the RV of the physical shared channel can only be one of group 2, such as group 1= { RV0, RV3}, and group 2= { RV1, RV2}; at this time, the additional RV indication in the DCI only needs one bit, that is, one bit determines which RV of the physical shared channel is in group 1 or which RV of group 2.

For another example, when the number of RVs to be selected or to be confirmed is 2, such as 2 RVs are included in the determined first RV set, the RVs may be directly and indirectly or implicitly indicated or determined by the NDI, where, for example, the NDI indicates that data of one physical shared channel is initial transmission data, the RV of the physical shared channel is a first RV in the first RV set, and the NDI indicates that the data of the physical shared channel is retransmission data, the RV of the physical shared channel is a second RV in the first RV set.

It should be noted that, the manner of implicitly indicating the RV by the NDI is taken as an example, but the present application does not limit this manner, and the NDI information may also be implicitly indicated by the RV information in the present application. For example, when the RV field in the DCI indicates that the redundancy version of a physical shared channel is one of { RV0, RV3}, the data of the physical shared channel is initially transmitted, or the NDI information of the physical shared channel is initially transmitted, otherwise, the data of the physical shared channel is retransmitted. The HARQ process of the physical shared channel based on the two transmissions may also be determined as retransmission if the redundancy version indicated in the previous transmission is RV0 or RV3 and the redundancy version indicated in the current transmission is RV1 or RV2, where the HARQ processes of the physical shared channel based on the two transmissions are the same.

When the physical shared channel scheduled by a single DCI is N, and N is greater than 1, the technical solution of the present application may reduce at least N bits compared to the current NR protocol, and in particular, may reduce more bits when the physical shared channel includes multiple codewords.

Case 2:

in this case, the first information is used to jointly indicate NDI information of the plurality of physical shared channels. At this time, a plurality of physical shared channels are used for initial transmission or retransmission of data.

Specifically, a field is added to the DCI to indicate whether multiple physical shared channels scheduled by a single DCI are used for initial transmission or retransmission of data, and at this time, only one bit is needed instead of one bit for each physical shared channel in the current NR protocol to indicate that the channel is used for initial transmission or retransmission of data.

Optionally, if initial transmission is indicated, the HARQ process of the first physical shared channel is indicated in the DCI at the same time, and the HARQ processes of the other physical shared channels are sequentially incremented by one. In addition, if one of the HARQ processes has not finished transmission, for example, belongs to a physical shared channel that has an error in previous transmission and needs to be retransmitted, or a certain HARQ process belongs to a HARQ set corresponding to retransmission, the HARQ process may be selectively skipped when the processes are sequentially added.

Specifically, referring to the description in fig. 5, the HARQ process of the first physical shared channel for the initial transmission data is the first HARQ process that starts from the HARQ process of the first physical shared channel indicated in the DCI (excluding the HARQ process), is in clockwise order, and is not in the retransmission HARQ process set.

Further, because the HARQ processes are not increased without limit, in the current NR protocol, the total number of HARQ processes is 32, 16, or 64, that is, the value range of the HARQ processes is 0 to 32, 0 to 15, or 0 to 63, when the number of PDSCH transmitted exceeds 32 (or 16 or 64), counting from 0 is started again, and the cycle is performed according to the rule. For example, assuming that the retransmission corresponding HARQ process set is an empty set, the scheduled HARQ process of the (i + 1) th physical shared channel may be mod (a + i, M), where a is the indicated HARQ process and M is the total number of HARQ processes, such as 32, 16, or 64.

Optionally, if retransmission is indicated, the HARQ process of the first retransmitted physical shared channel is indicated in the DCI at the same time, and the HARQ processes of the other physical shared channels are sequentially read from the buffer in time order, and if the HARQ processes stored in the buffer in time order are { H1, H2, H3, H4, H5, H6, … }, respectively, when the indicated HARQ process is H1 and the number of the scheduled physical shared channels is 4, the HARQ process corresponding to the retransmitted physical shared channel is sequentially { H1, H2, H3, H4}.

As shown in fig. 7, 32 HARQ processes are assumed in total, and the numbers are 0 to 31. HARQ processes 0-7 are respectively configured on 8PDSCHs (each PDSCH corresponds to one time slot) of first scheduling (first PDCCH), wherein the 7 th time slot is the transmission failure of the PDSCH corresponding to the HARQ process with the number of 6, the 8PDSCHs of second scheduling are respectively configured with HARQ processes 8-15, the PDSCHs corresponding to the HARQ processes with the numbers of 11 and 13 are transmitted failure, the 8PDSCHs of third scheduling are respectively configured with HARQ processes 16-23, the PDSCH corresponding to the HARQ process with the number of 17 is transmitted failure, the 8PDSCHs of fourth scheduling are respectively configured with HARQ processes 24-31, and the PDSCH corresponding to the HARQ process with the number of 31 is transmitted failure.

The terminal device 102 feeds back information of successful transmission or failed transmission to the network device 101 in the form of Acknowledgement (ACK) or Negative Acknowledgement (NACK), and the network device 101 can identify the HARQ process corresponding to the PDSCH of failed transmission according to the feedback information of the terminal device 102 and store the HARQ processes in the buffer according to the time sequence of generating errors, that is, the HARQ processes stored in the buffer in time sequence are sequentially {6, 11, 13, 17, 31}. In next scheduling, if all scheduled PDSCHs are retransmitted PDSCHs, the HARQ processes corresponding to the retransmitted PDSCHs are sequentially taken according to the sequence stored in the buffer, if the number of the retransmitted PDSCHs is 4, and the HARQ process is indicated as 6 in the DCI, the HARQ processes of other PDSCHs except the first PDSCH are respectively 11, 13, and 17, and then the network device sequentially selects the HARQ process 6 in the buffer and the PDSCH retransmissions corresponding to the three HARQ processes located after 6, that is, the PDSCH retransmissions corresponding to the HARQ processes respectively 6, 11, 13, and 17.

In the next scheduling, if the scheduled PDSCHs are all initially transmitted, it may be indicated that the HARQ process of the first PDSCH is 0, or 32mod 32, a mod B represents the remainder of dividing a by B, e.g., 10mod 32=10, 40mod 32=8, and the HARQ processes of the other PDSCHs sequentially add one. Since the network device 101 has not received the information of the correct transmission of the PDSCH corresponding to the retransmitted HARQ process {6, 11, 13, 17} fed back by the terminal device 102, in the process of sequentially adding one, the HARQ process in the buffer needs to be skipped, for example, the HARQ process {6, 11, 13, 17, 31} is skipped, so the HARQ processes of the initially transmitted PDSCH scheduled at this time are {0,1,2,3,4,5,7,8}, respectively.

Therefore, when the number of physical shared channels scheduled by a single DCI is N (N is an integer greater than 1), and each physical shared channel has only one codeword, the load of a field indicating whether all PDSCHs are initially transmitted or retransmitted in the DCI can be reduced by N-1 bits compared to the current NR protocol, and further, when the scheme in case 1, that is, the RV information is implicitly or indirectly indicated at the same time, the N bits indicating the RV of each PDSCH in the DCI, that is, the set case 1 and case 2, can be omitted or reduced, and 2N-1 bits are reduced in total.

According to the technical scheme of the application, when a plurality of physical shared channels scheduled by a single DCI are all used for initial transmission or retransmission data, one bit is added to jointly indicate that all the physical shared channels scheduled by the DCI are all used for the initial transmission or retransmission data, and an NDI domain corresponding to each physical shared channel is replaced, so that the number of NDI indication bits of the plurality of physical shared channels is obviously reduced, the load of the DCI is reduced, and the coverage of the PDCCH is improved.

Case 3:

in this case, the first information is used to jointly indicate NDI information of the plurality of physical shared channels. At this time, the plurality of physical shared channels include a channel for initially transmitting data and a channel for retransmitting data.

Specifically, at this time, the DCI further includes third information, that is, K is required _b The number of bits indicates the number of physical shared channels retransmitted in one scheduling (single DCI). And the retransmitted physical shared channel is located at a fixed position in the multiple physical shared channels scheduled by the single DCI, such as the former K _ReT (0<＝K _ReT <＝2^K _b -1，K _b Domain load indicating the number of PDSCH retransmitted in DCI) is a retransmitted physical shared channel. Or may be a rear K _ReT The physical shared channel is a retransmitted physical shared channel. K _ReT Is given a value of K _b Determination of the value of an indication of a bit, e.g. in K _b For example, =2, '00' means that the number of retransmitted PDSCHs is 0, '01' means that the number of retransmitted PDSCHs is 1, '10' means that the number of retransmitted PDSCHs is 2, '11' means that the number of retransmitted PDSCHs is 3.

For example, the DCI may further include fourth information indicating a HARQ process of a first physical shared channel among physical shared channels used to retransmit data. Other HARQ processes of the physical shared channel for retransmitting data are sequentially selected from the buffer in chronological order, and this portion is described with reference to case 2, and will not be described herein again. Other HARQ process determination methods for the initial transmission data physical shared channel are as follows:

a) Determining the HARQ process of the first physical shared channel for initial transmission data: the HARQ process of the first physical shared channel for the initial transmission data is the first process available after the indicated first retransmission HARQ process, and the available process does not belong to the process in the retransmission buffer and does not belong to the process corresponding to the scheduled physical shared channel that has not received the feedback information. Specifically, referring to the description in fig. 5, the HARQ process of the first physical shared channel for the initial transmission data is the HARQ process of the first physical shared channel indicated in the DCI as the starting point (excluding the HARQ process), and is not in or belongs to the first HARQ process in the retransmission HARQ process set according to the clockwise order.

b) And sequentially adding one to other HARQ processes of the physical shared channel for the initial data based on the HARQ process of the first physical shared channel for the initial data, and skipping the HARQ process stored in the buffer, further, because the HARQ processes are not increased without limit, in the current NR protocol, the total number of the HARQ processes is 32, 16 or 64, that is, the value range of the HARQ processes is 0-32, 0-15 or 0-63, so that when the number of the transmitted PDSCHs exceeds 32 (or 16 or 64), counting is started from 0 again, and circulation is performed according to the rule. For example, assuming that the set of HARQ processes corresponding to the retransmission is an empty set, the HARQ process of the (i + 1) th scheduled physical shared channel may be mod (a + i, M), where a is the indicated HARQ process and M is the total number of HARQ processes, such as 32, 16, or 64.

As shown in fig. 8, assuming that there are 32 HARQ processes, the numbers are 0 to 31, and PDSCH transmission failures with HARQ processes {6, 10, 13, 17, 31} are sequentially found in the first four schedules. After the report of the terminal device 102, the retransmission data buffer at the network device 101 side may store {6, 10, 13, 17, 31}. When the next transmission is made, a total of 8 slots are scheduled, where K, a bit indicating the number of PDSCHs used to retransmit the data _b Is 2, and the indication value is '11', that is, the data of 3 PDSCHs is retransmission data,the data of the remaining 5 PDSCHs are the initial transmission data. It is assumed that the indicated HARQ process of the first PDSCH for transmitting retransmission data is 6, and the HARQ processes of other PDSCHs for transmitting retransmission data are sequentially fetched from the retransmission data buffer in chronological order, that is, the HARQ processes of the second and third PDSCHs for retransmitting data are sequentially 10 and 13 after 6. According to the method described above, the first HARQ process for the PDSCH of the initial transmission data is the first available process after 6, and it is known that the HARQ process for the PDSCH of the initial transmission data is 7, the HARQ processes for the other PDSCHs of the initial transmission data are +1 in sequence, and the HARQ processes in the buffer are skipped, that is, the HARQ processes for the other PDSCHs of the initial transmission data are 8,9, 11, 12 (the HARQ process 10 is skipped).

It should be noted that, if ACK and NACK information of PDSCHs corresponding to the HARQ processes 24 to 31 are not fed back on PUCCH resources in time, when determining the HARQ process of the PDSCH for the initial transmission data, the HARQ processes 24 to 31 also belong to unavailable processes.

Therefore, when the number of physical shared channels scheduled by a single DCI is N (N is an integer greater than 1), and each physical shared channel has only one codeword, the DCI load can be reduced by N-K compared to the current NR protocol _b Further, when combining the scheme in case 1, that is, implicitly or indirectly indicating the RV information of each PDSCH at the same time, the DCI load may also reduce or omit N bits indicating the RV, that is, reduce 2N-K in total _b And (4) a bit.

Case 4

In this case, the first information is used for NDI information and/or RV information jointly indicating a plurality of codewords of the physical shared channel.

The specific indication method is the same as the above, that is, a plurality of code words of one physical shared channel are simultaneously indicated through one field in DCI for initial transmission or retransmission of data, only one bit is needed at this time, and instead of the current NR protocol, each code word of one physical shared channel has one bit to indicate that the channel is used for initial transmission or retransmission of data.

The method further includes that the RVs of multiple code words of one physical shared channel are indicated through one domain in the DCI at the same time, that is, the RVs of the multiple code words are the same, at this time, only 2 or 1 bits (2 corresponding to a single PDSCH, and 1 corresponding to multiple PDSCHs) are needed, and instead of the current NR protocol, each code word of one physical shared channel has one bit to indicate the RV version in the data transmission process of the channel.

When the number of physical shared channels scheduled by a single DCI is N (N positive integer), and each physical shared channel is a double codeword, the NDI of the double codeword of each physical channel is the same, one bit is used to indicate the NDI of the double codeword simultaneously, the RV of the double codeword of each physical channel is the same, and one or 2 bits are used to indicate the RV of the double codeword simultaneously, compared to the current NR protocol, 2N bits may be reduced when N >1 (1 bit may be reduced for each PDSCH to indicate the NDI of the second codeword, 1 bit to indicate the RV of the second codeword), and 3 bits may be reduced when N =1 (1 bit may be reduced to indicate the NDI of the second codeword, and 2 bits to indicate the RV of the second codeword).

Further, the DCI load may be further reduced in conjunction with case 1 and/or case 2.

Further, in this situation, the present application may also adopt a differential indication manner for the MCS values of multiple code words, so as to reduce the load of the DCI.

For example, the MCS of the first codeword is indicated (5 bits) as in the current NR protocol, e.g., MCS indication (MCS _ idx), and the MCS of the second codeword indicates a differential value, e.g., Δ MCS, then the MCS of the second codeword is MCS _ idx — Δ MCS.

Optionally, in the embodiment of the present application, a uniformly stepped adjustment expression may be adopted for Δ MCS. Specifically, for example, Δ MCS = a × ii, ii =1,2, …, I _ max, a is a differential MCS adjustment step, and a may be greater than 1, for example, a =2, I _maxmay be fixed, for example, I _ max =8, because after a MCS difference between two codewords exceeds a certain threshold, the MCS of the two codewords independent may improve system performance to a limited extent, and in order to reduce complexity, a layer with poor scheduling quality may not be scheduled, that is, a scheduling layer may be controlled to be the number of layers required for scheduling a single codeword. For example, in the existing NR protocol, when the number of layers is greater than 4, dual codewords are scheduled, and if the number of scheduled layers is greater than 4, the difference between channel qualities between layers is large, and at this time, the difference between the MCS values of the dual codewords is large, so that the MCS difference value of the dual codewords exceeds the threshold, compared with scheduling only 4 layers to transmit single codewords, performance improvement is very limited, and thus from the perspective of reducing complexity, only 4 layers can be scheduled to transmit single codewords. Namely, the application scenario is limited after the MCS difference of the double code words exceeds the threshold, so that the value range of the MCS difference on the two code words can be limited, and the load of the MCS in the DCI can be further reduced by avoiding configuring an unreasonable scenario.

When there are two codewords for each physical shared channel of a single DCI schedule, compared to the current NR protocol (taking the example that the MCS indication requires 5 bits), the DCI payload can be reduced by 2 bits (MCS field) for I _ max =8, because then the second MCS needs only 3 bits to indicate, the DCI payload can be reduced by 3 bits (MCS field) for I _ max =4, and the second MCS needs only 2 bits to indicate. Further, in combination with the schemes in case 1 and/or case 2, that is, the NDI and RV information of one PDSCH are jointly indicated at the same time, or the NDI information of multiple PDSCHs is jointly indicated, the DCI load may be further reduced.

Optionally, a non-uniform step-by-step representation of Δ MCS may also be employed. Specifically, Δ MCS = { MCS _△1 ，MCS _△2 ，…，MCS _{△I_max} In which MCS _△i -MCS _△(i-1) I.e. the difference between two consecutive Δ MCS is larger the lower the MCS of the second codeword determined based on Δ MCS corresponds to the lower the spectral efficiency under the same MCS _ idx. It is provided withFor the beneficial effects, please refer to the above description, which is not repeated herein.

It should be understood that the above-mentioned uniform quantization and non-uniform quantization of Δ MCS are only some of the representations listed in this application by way of example and not limitation. In practical applications or as technologies develop, Δ MCS may also be expressed by other ways, which is not limited in this application. For example, considering that when two codewords are transmitted, the channel quality corresponding to the layer mapped by the first codeword is better, and the MCS value of the layer mapped by the first codeword is higher, for example, greater than 10 or greater than a specified value, by using this characteristic, the load of the MCS of the first codeword can be further reduced, for example, the MCS value range of the first codeword is limited to a-28 when the two codewords are limited, and if a value > =13, the load of the MCS of the first codeword can be reduced to 4 bits.

It will also be appreciated that the above differential indication may also be extended to the MCS value of the second codeword, i.e. the MCS of the first codeword is determined by the MCS of the second codeword and the differential value between the two MCSs.

According to the technical scheme of the application, when a plurality of physical shared channels scheduled by the DCI include a plurality of code words, a field is added in the DCI for indicating NDI information of the plurality of code words of the physical shared channels, and replaces the NDI field corresponding to each code word, so that the number of NDI indicating bits of the plurality of code words is obviously reduced, further, a second code word can be indicated by a difference value between an MCS value of the first code word and two MCS values, the load of the DCI can be further reduced, and the coverage of the PDCCH is improved.

It should be noted that, in the above cases, except that there is an alternative relationship between case 2 and case 3, any combination of the cases can be used to further reduce the DCI load. For example, case 2, case 3, and case 4 may be combined with case 1, as already listed above, and on this basis, one skilled in the art may think that case 2 may be combined with case 4, or case 3 may be combined with case 4. For another example, although not shown above, cases 1,2 (or 3) and 4 may also be combined at the same time, i.e., the first information is used for jointly indicating NDI information and/or RV information of multiple codewords of multiple physical shared channels scheduled by a single DCI.

To more clearly demonstrate the effect of the embodiments of the present application, table 4 shows 8PDSCHs, each PDSCH including a dual codeword, I _ max =8,K _b For example, =2, and the bit cases in the partial case and the partial case combination are shown.

Table 4 DCI load situation under partial situation and partial situation combination of the present application

Wherein:

case 1 is used to represent NDI information and RV information indicating the same physical shared channel (PDSCH or PUSCH) jointly;

case 2a is used to represent NDI information indicating all physical shared channels jointly; NDI information of different code words of the same physical shared channel is independent;

case 2b is used to represent NDI information and RV information indicating all physical shared channels jointly; NDI information and RV information of different code words of the same physical shared channel are independent;

case 3a is used to represent NDI information indicating a plurality of physical shared channels jointly; NDI information of different code words of the same physical shared channel is independent;

case 3b is used to represent NDI information and RV information indicating a plurality of physical shared channels jointly; NDI information and RV information of different code words of the same physical shared channel are independent;

case 4 is used to indicate that MCS among multiple codewords of the same physical shared channel are indicated by differential MCS, and simultaneously jointly indicate NDI of multiple codewords of the same physical shared channel, and jointly indicate RV information of multiple codewords of the same physical shared channel;

case 1+ case 2a/2b is used to indicate that NDI information and RV information indicating the same codeword of the same physical shared channel + jointly indicate NDI information and RV information of all physical shared channels (because NDI information and RV information of the same physical shared channel are jointly indicated at this time, whether RV information of all physical shared channels jointly indicates does not need to be further distinguished, that is, when combined with case 1, case 2a is equivalent to case 2 b);

case 1+ case 3a/3b is used to indicate that NDI information and RV information jointly indicate the same codeword of the same physical shared channel + NDI information and RV information jointly indicate a plurality of physical shared channels (because NDI information and RV information of the same physical shared channel jointly indicate at this time, whether RV information of a plurality of physical shared channels jointly indicate does not need to be further distinguished, that is, when combined with case 1, case 3a is equivalent to case 3 b);

case 1+ case 4 is used to indicate that MCS among multiple codewords of the same physical shared channel are indicated by differential MCS, and NDI information and RV information of multiple codewords of the same physical shared channel are jointly indicated at the same time;

case 2a + case 4 is used to indicate that MCS among multiple codewords of the same physical shared channel are indicated by differential MCS, NDI information of multiple codewords of all physical shared channels is jointly indicated, and RV information of multiple codewords of the same physical shared channel is jointly indicated;

case 2b + case 4 is used to indicate that MCS among multiple codewords of the same physical shared channel is indicated by differential MCS, and NDI information and RV information of multiple codewords of all physical shared channels are jointly indicated at the same time;

case 3a + case 4 is used to indicate that MCS among multiple codewords of the same physical shared channel are indicated by differential MCS, and NDI information of multiple codewords of multiple physical shared channels are jointly indicated, and RV information of multiple codewords of the same physical shared channel is jointly indicated;

case 3b + case 4 is used to indicate that MCS among multiple codewords of the same physical shared channel is indicated by differential MCS, and NDI information and RV information of multiple codewords of multiple physical shared channels are jointly indicated at the same time;

case 1+ case 2a/2b + case 4 is used to indicate that MCS between multiple codewords of the same physical shared channel is indicated by differential MCS, and NDI information and RV information of multiple codewords of all physical shared channels are jointly indicated at the same time (refer to above, case 2a and case 2b can be considered equivalent at this time);

case 1+ case 3a/3b + case 4 is used to indicate that MCS between multiple codewords of the same physical shared channel is indicated by differential MCS while NDI information and RV information indicating multiple codewords of multiple physical shared channels are jointly indicated (refer to above, case 3a and case 3b may be considered equivalent at this time).

After configuring the indication information, the terminal device 102 may perform data transmission with the network device 101 according to the first information. Specifically, uplink data transmission and downlink data transmission may be included.

Mode 1: uplink data transmission

S403, the terminal device 102 determines the first information and completes generation, encoding, modulation, mapping, and the like of the uplink data according to the first information.

Specifically, the terminal device 102 may complete processing steps of generating, encoding, modulating, and mapping data according to the NDI information and/or the RV information.

Optionally, when the plurality of physical shared channels scheduled by the DCI include a plurality of codewords, the terminal device 102 further needs to complete the related processing of the data according to the MCS value.

S404, the terminal device 102 sends uplink data to the network device 101.

S405, the network device 101 completes demodulation and decoding of the uplink data according to the first information.

Specifically, the network device 101 may complete the processing steps of demodulating and decoding data according to the NDI information and/or the RV information.

Optionally, when the plurality of physical shared channels scheduled by the DCI include a plurality of codewords, the network device 101 further needs to complete the related processing of the data according to the MCS value.

S406, the network device 101 transmits HARQ information to the terminal device 102.

For the determination of the HARQ process number, please refer to the above description, and for brevity, the description is omitted here.

Mode 2: downlink data transmission

S407, the network device 101 completes generation, encoding, modulation, mapping, and the like of the uplink data according to the first information.

Specifically, the network device 101 may complete processing steps of generating, encoding, modulating, and mapping data according to the NDI information and/or the RV information.

S408, the network device 101 sends the downlink data to the terminal device 102.

S409, the terminal device 102 determines the first information, and completes demodulation and decoding of the downlink data according to the first information.

Specifically, the terminal device 102 may complete the processing steps of demodulating and decoding the data according to the NDI information and/or the RV information.

Alternatively, when the plurality of physical shared channels scheduled by the DCI include a plurality of codewords, the terminal device 102 further needs to complete the relevant processing on the data according to the MCS value.

S410, the terminal apparatus 102 transmits HARQ information to the network apparatus 101.

It should be understood that, the sequence numbers of the above processes do not imply any order of execution, and the order of execution of the processes should be determined by their functions and inherent logic, and should not limit the implementation process of the embodiments of the present application in any way.

It is also to be understood that, in various embodiments of the present application, unless otherwise specified or conflicting in logic, terms and/or descriptions between different embodiments are consistent and may be referred to one another, and technical features in different embodiments or situations may be combined to form new embodiments according to their inherent logical relationships.

It is to be understood that, in the above embodiments of the present application, the method implemented by the communication device may also be implemented by a component (e.g., a chip or a circuit) that can be configured inside the communication device.

Hereinafter, the data transmission device according to the embodiment of the present application will be described in detail with reference to fig. 9 and 10. It should be understood that the description of the apparatus embodiment corresponds to the description of the method embodiment, and therefore, for the sake of brevity, some details are not repeated herein.

In the embodiment of the present application, the functional modules may be divided according to the above method example for the transmitting end device or the receiving end device, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation. The following description will be given taking the example of dividing each functional module corresponding to each function.

Fig. 9 is a schematic block diagram of an example of a data transmission device 700 provided in the present application. Any of the devices involved in any of the

methods

300 and 400, such as the network device 101, the terminal device 102, etc., may be implemented by the data transmission device shown in fig. 9.

It should be understood that the data transmission device 700 may be a physical device, may be a component (e.g., an integrated circuit, a chip, etc.) of a physical device, and may be a functional module in a physical device.

As shown in fig. 9, the data transmission apparatus 700 includes: one or more processors 710. Optionally, an interface may be called in the processor 710 to implement the receiving and sending functions. The interface may be a logical interface or a physical interface, which is not limited in this respect. For example, the interface may be a transceiver circuit, an input-output interface, or an interface circuit. The transceiver circuitry, input/output interface or interface circuitry for implementing the receive and transmit functions may be separate or integrated. The transceiver circuit or the interface circuit may be used for reading and writing code/data, or the transceiver circuit or the interface circuit may be used for transmitting or transferring signals.

Alternatively, the interface may be implemented by a transceiver. Optionally, the data transmission device 700 may further comprise a transceiver 730. The transceiver 730 may also be referred to as a transceiver unit, a transceiver circuit, etc. for implementing a transceiving function. In some scenarios, the transceiver 730 may also be specifically divided into a receiver for performing the receiving function and a transmitter for performing the transmitting function.

It is to be understood that the transceiver 730 described above may include a receiver for performing the receiving function of the transceiver 730 and a transmitter for performing the transmitting function of the transceiver 730.

Optionally, the data transmission device 700 may further comprise a memory 720. The specific disposition location of the memory 720 is not particularly limited in the embodiments of the present application, and the memory may be integrated with the processor or may be independent of the processor. For the case where the data transmission device 700 does not include a memory, the data transmission device 700 may have a processing function, and the memory may be disposed in other locations (e.g., a cloud system).

Processor 710, memory 720 and transceiver 730 communicate control and/or data signals with each other via internal connection paths.

It will be appreciated that, although not shown, the data transfer device 700 may also include other devices, such as an input device, an output device, a battery, etc.

Optionally, in some embodiments, memory 720 may store instructions for performing the execution of the methods of embodiments of the present application. The processor 710 may execute the instructions stored in the memory 720 to perform the steps of the method described below in combination with other hardware (e.g., the transceiver 730), and the specific working process and advantages may refer to the description of the method embodiments above.

The method disclosed by the embodiment of the present application can be applied to the processor 710, or implemented by the processor 710. Processor 710 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in a Random Access Memory (RAM), a flash memory, a read-only memory (ROM), a programmable ROM, an electrically erasable programmable memory, a register, or other storage media that are well known in the art. The storage medium is located in a memory, and a processor reads instructions in the memory and combines hardware thereof to complete the steps of the method.

It will be appreciated that the memory 720 can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory ROM, a programmable read-only memory (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be random access memory, RAM, which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), SLDRAM (synchronous DRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Fig. 10 is a schematic block diagram of a data transmission apparatus 800 provided herein.

Optionally, the specific form of the data transmission apparatus 800 may be a general-purpose computer device or a chip in a general-purpose computer device, which is not limited in this embodiment of the present application. As shown in fig. 10, the data transmission apparatus includes a processing unit 810 and a transceiving unit 820.

In particular, the data transmission apparatus 800 may be any device related to the present application, and may implement the functions that the device can implement. It should be understood that the data transmission apparatus 800 may be a physical device, a component (e.g., an integrated circuit, a chip, etc.) of the physical device, or a functional module in the physical device.

The transceiving unit 820 is configured to implement transceiving operations in the above method embodiments, and the processing unit 810 is configured to implement operations other than transceiving operations. Optionally, the transceiving unit 820 may include a receiving unit and a transmitting unit, the receiving unit is configured to implement the receiving function of the transceiving unit 820, and the transmitting unit is configured to implement the transmitting function of the transceiving unit 820.

In a possible design, the data transmission apparatus 800 may be the terminal device 102 in the foregoing method embodiment, or may be a chip for implementing the function of the terminal device 102 in the foregoing method embodiment.

For example, the transceiver unit, more specifically, a receiving unit in the transceiver unit, is configured to receive downlink control information DCI from the network device, where the DCI is used to schedule at least one physical shared channel, and the DCI includes first information, and the first information is used to jointly indicate new data indication NDI information and redundancy version RV information of the at least one physical shared channel; and the transceiving unit is also used for carrying out data transmission with the network equipment according to the first information.

Optionally, the transceiver unit, more specifically, the receiving unit in the transceiver unit, is further configured to receive a radio resource control RRC message from the network device, where the RRC message is used to indicate a first RV set, and the first RV set includes an RV corresponding to RV information indicated by the first information.

It should also be understood that when the data transmission apparatus 800 is the terminal device 102, the transceiving unit 820 in the data transmission apparatus 800 may be implemented by a communication interface (such as a transceiver or an input/output interface), and the processing unit 810 in the data transmission apparatus 800 may be implemented by at least one processor, for example, may correspond to the processor 710 shown in fig. 9.

Optionally, the data transmission apparatus 800 may further include a storage unit, and the storage unit may be configured to store instructions or data, and the processing unit may call the instructions or data stored in the storage unit to implement the corresponding operation.

It should be understood that the specific processes of the units for executing the corresponding steps are already described in detail in the above method embodiments, and therefore, for brevity, detailed descriptions thereof are omitted.

In another possible design, the data transmission apparatus 800 may be the network device 101 in the foregoing method embodiment, or may be a chip for implementing the functions of the network device in the foregoing method embodiment.

For example, the transceiver unit, more specifically, a transmitting unit in the transceiver unit, is configured to transmit downlink control information DCI to the terminal device, where the DCI is used to schedule at least one physical shared channel, and the DCI includes first information, and the first information is used to jointly indicate new data indication NDI information and redundancy version RV information of the at least one physical shared channel; and the transceiving unit is also used for carrying out data transmission with the terminal equipment according to the first information.

Optionally, the transceiver unit, more specifically, the transmitting unit in the transceiver unit, is further configured to transmit a radio resource control RRC message to the terminal device, where the RRC message includes a first RV set, and the first RV set includes an RV corresponding to the RV information indicated by the first information.

It should also be understood that when the data transmission apparatus 800 is the network device 101, the transceiving unit 820 in the data transmission apparatus 800 may be implemented by a communication interface (e.g., a transceiver or an input/output interface, wherein the transmitting unit corresponds to a transmitter or an output interface, and the receiving unit corresponds to a receiver or an input interface), for example, may correspond to the communication interface 730 shown in fig. 9, and the processing unit 810 in the data transmission apparatus 800 may be implemented by at least one processor, for example, may correspond to the processor 710 shown in fig. 9.

In addition, in the present application, the data transmission device 800 is presented in the form of a functional module. "module" herein may refer to an application specific integrated circuit ASIC, a circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other devices that may provide the described functionality. In a simple embodiment, those skilled in the art will appreciate that the apparatus 800 may take the form shown in FIG. 10. The processing unit 810 may be implemented by the processor 710 shown in fig. 9. Alternatively, if the computer device shown in fig. 9 includes the memory 720, the processing unit 810 may be implemented by the processor 710 and the memory 720. The transceiving unit 820 may be implemented by the transceiver 730 shown in fig. 9. The transceiver 730 includes a receive function and a transmit function, which may also be referred to as a receiver and a transmitter, respectively. In particular, the processor is implemented by executing a computer program stored in the memory. Alternatively, when the apparatus 800 is a chip, then the functions and/or implementation processes of the transceiving unit 820 can also be implemented by pins or circuits, etc. Alternatively, the memory may be a storage unit in the chip, such as a register, a cache, or the like, and the storage unit may also be a storage unit located outside the chip in the data transmission apparatus, such as the memory 720 in fig. 9, or may also be a storage unit disposed in another system or device, which is not in the computer device.

Various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disk, floppy disk, or magnetic tape), optical disks (e.g., compact Disk (CD), digital Versatile Disk (DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), card, stick, or key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

According to the method provided by the embodiment of the present application, the present application further provides a computer program product, which includes: a computer program or a set of instructions, which, when run on a computer, causes the computer to perform the method of any one of the embodiments shown in figures 4 and 6.

According to the method provided by the embodiment of the present application, the present application further provides a computer-readable storage medium, which stores a program or a set of instructions, and when the program or the set of instructions is executed on a computer, the computer is caused to execute the method of any one of the embodiments shown in fig. 4 and fig. 6.

According to the method provided by the embodiment of the present application, the present application further provides a communication system, which includes the foregoing apparatus or device.

As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component may be localized on one computer and/or distributed between two or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes based on a signal having one or more data packets (e.g., data from two components interacting with another component in a local system, distributed system, and/or across a network, such as the internet with other systems by way of the signal).

It should also be understood that the term "and/or" herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should also be understood that the numbers "first", "second", and the like in the embodiments of the present application are introduced only for distinguishing different objects, for example, for distinguishing different "information", or "device", or "unit", and the understanding of the specific object and the corresponding relationship between different objects should be determined by the functions and the inherent logic thereof, and should not constitute any limitation to the implementation process of the embodiments of the present application.

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

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of data transmission, comprising:

the method comprises the steps that network equipment sends Downlink Control Information (DCI) to terminal equipment, wherein the DCI is used for scheduling at least one physical shared channel and comprises first information, and the first information is used for jointly indicating New Data Indication (NDI) information and Redundancy Version (RV) information of the at least one physical shared channel;

and the network equipment performs data transmission with the terminal equipment according to the first information.

2. The method of claim 1, wherein when the NDI information indicates that the data of the physical shared channel is initially transmitted data, the RV of the initially transmitted data is a first subset of a first RV set; or,

when the NDI information indicates that the data of the physical shared channel is retransmission data, the RV of the retransmission data is a second subset in the first RV set;

wherein a full set of the first subset and the second subset is the first RV set, and an intersection of the first subset and the second subset is an empty set.

3. The method of claim 2, further comprising:

and the network equipment sends a Radio Resource Control (RRC) message to the terminal equipment, wherein the RRC message is used for indicating the first RV set, and the first RV set comprises the RV corresponding to the RV information indicated by the first information.

4. The method of claim 3, wherein the RRC message indicates a plurality of RV sets, and wherein the method further comprises:

and the network equipment sends Media Access Control (MAC) information to the terminal equipment, wherein the MAC information is used for indicating the first RV set in the plurality of RV sets.

5. A method of data transmission, comprising:

the method comprises the steps that terminal equipment receives Downlink Control Information (DCI) from network equipment, wherein the DCI is used for scheduling at least one physical shared channel and comprises first information, and the first information is used for jointly indicating New Data Indication (NDI) information and Redundancy Version (RV) information of the at least one physical shared channel;

and the terminal equipment performs data transmission with the network equipment according to the first information.

6. The method of claim 5, wherein when the NDI information indicates that the data of the physical shared channel is initially transmitted data, the RV of the initially transmitted data is a first subset of a first RV set; or,

7. The method of claim 6, further comprising:

and the terminal equipment receives a Radio Resource Control (RRC) message from the network equipment, wherein the RRC message is used for indicating the first RV set, and the first RV set comprises the RV corresponding to the RV information indicated by the first information.

8. The method of claim 7, wherein the RRC message is configured to indicate a plurality of RV sets, and wherein the method further comprises:

and the terminal equipment receives Media Access Control (MAC) information, wherein the MAC information is used for indicating the first RV set in the plurality of RV sets.

9. The method according to claim 1 or 5, wherein the at least one physical shared channel comprises a plurality of physical shared channels, and the first information is further used for simultaneously indicating that the data of the plurality of physical shared channels are all initial transmission data or retransmission data.

10. The method of claim 9, wherein the DCI further comprises second information indicating a HARQ process of a first physical shared channel of the plurality of physical shared channels.

11. The method as claimed in claim 10, wherein when the data of the plurality of physical shared channels are all the initial transmission data, the HARQ processes of the physical shared channels for the initial transmission data other than the HARQ process of the first physical shared channel for the initial transmission data are sequentially incremented by one based on the HARQ process of the first physical shared channel.

12. The method as claimed in claim 10, wherein when the data of the plurality of physical shared channels are all the retransmission data, the HARQ processes of the physical shared channels for retransmitting data other than the first HARQ process of the physical shared channel for retransmitting data are sequentially determined from the retransmission HARQ process set according to the time order.

13. The method according to claim 1 or 5, wherein the at least one physical shared channel comprises a plurality of physical shared channels, the plurality of physical shared channels comprise a physical shared channel for initially transmitting data and a physical shared channel for retransmitting data, and the DCI further comprises third information indicating the number of the physical shared channels for retransmitting data.

14. The method of claim 13, wherein the DCI further comprises fourth information indicating a HARQ process of a first physical shared channel of the physical shared channels for retransmitting data.

15. The method according to claim 14, characterized in that the other physical shared channel HARQ processes for retransmitting data than the first physical shared channel HARQ process for retransmitting data are determined in chronological order from a set of retransmission HARQ processes.

16. The method as claimed in claim 15, wherein the HARQ process of the first physical shared channel for the initially transmitted data is the first HARQ process that is not included in the retransmission HARQ process set after the HARQ process of the first physical shared channel of the physical shared channels for the retransmission data, and the HARQ processes of the physical shared channels for the initially transmitted data other than the HARQ process of the first physical shared channel for the initially transmitted data are sequentially incremented by one based on the HARQ process of the first physical shared channel for the initially transmitted data.

17. The method according to claim 1 or 5, characterized in that one or more codewords of the at least one physical shared channel share the first information, or,

the first information is applied to a plurality of codewords of the at least one physical shared channel.

18. The method of claim 17, wherein the plurality of codewords comprise a first codeword and a second codeword, and wherein the DCI further comprises fifth information indicating a differential value of a Modulation and Coding Scheme (MCS) value of the second codeword and an MCS value of the first codeword.

19. The method of claim 18, wherein the step value of the difference value is a fixed value or a non-fixed value.

20. A communications apparatus, comprising: a processor, a memory, and a transceiver, the processor coupled with the memory, the memory to store a program or instructions that, when executed by the processor, cause the apparatus to implement the method of any of claims 1-19.

21. A computer-readable storage medium, having stored thereon a computer program or instructions, which, when executed by a processor, causes the method of any one of claims 1 to 19 to be performed.

22. A chip system, comprising: a processor for executing computer programs or instructions in a memory, such that a communication device in which the system-on-chip is installed implements the method of any one of claims 1 to 19.