CN118018158A - Data transmission method, device and storage medium - Google Patents

Abstract

The disclosure provides a data transmission method, a data transmission device and a storage medium, which relate to the technical field of communication and are used for reducing feedback overhead and improving reliability of data retransmission. The data transmission method comprises the following steps: the first node transmits first indication information indicating a data transmission type; and the first node performs data transmission with the second node based on the first indication information.

Description

Data transmission method, device and storage medium

Technical Field

The disclosure relates to the field of communication technologies, and in particular, to a data transmission method, a data transmission device and a storage medium.

Background

In the 5 th generation new air interface (5g new radio,5G NR) system, in order to process data transmission under a large bandwidth and reduce implementation complexity, a Transport Block (TB) is divided into a plurality of small Code Blocks (CB), and the number of bits of each CB does not exceed a threshold. If one CB in the TB is decoded incorrectly, the entire TB will be retransmitted, which results in a large number of invalid transmissions in the retransmission, thereby affecting the efficiency of the system.

To avoid unnecessary retransmissions of successfully decoded CBs and to allow for the introduction of hybrid automatic repeat request acknowledgements for each CB (Hybrid automatic repeat request-

The HARQ-ACK feedback information causes the problem of excessive HARQ-ACK feedback overhead, divides a TB into N Code Block Groups (CBGs), each CBG is composed of one or more CBs, and uses the 1-bit HARQ-ACK feedback information to indicate whether the CBs in the CBG are decoded correctly. If all CBs within one CBG are decoded correctly, the HARQ-ACK feedback is ACK, otherwise the HARQ-ACK feedback is NACK (Negative acknowledgement) and the entire CBG needs to be retransmitted. The CBG size can be configured to balance retransmission efficiency and feedback overhead so as to improve system efficiency. However, in the case of a larger TB and a larger number of CBGs, the overall feedback overhead may be higher and the data retransmission reliability may not be guaranteed.

Disclosure of Invention

The embodiment of the disclosure provides a data transmission method, a data transmission device and a storage medium, which are used for reducing feedback overhead and improving retransmission reliability. The technical scheme provided by the embodiment of the disclosure is as follows:

in one aspect, a data transmission method is provided and applied to a first node, and the method includes:

transmitting first indication information indicating a data transmission type;

And carrying out data transmission with the second node based on the first indication information.

In another aspect, a data transmission method is provided, applied to a second node, and the method includes:

first indication information indicating a data transmission type is received.

And carrying out data transmission with the first node based on the first indication information.

In yet another aspect, a data transmission apparatus is provided, applied to a first node, the apparatus including:

The communication module is used for transmitting first indication information indicating the data transmission type;

And the communication module is also used for carrying out data transmission with the second node based on the first indication information.

In yet another aspect, a data transmission apparatus is provided, applied to a second node, the apparatus including:

and the communication module is used for receiving first indication information indicating the data transmission type.

And the communication module is also used for carrying out data transmission with the first node based on the first indication information.

In yet another aspect, there is provided a communication apparatus comprising: a memory and a processor; the memory is coupled to the processor; the memory is used for storing computer program instructions executable by the processor; the processor, when executing the computer program instructions, implements the data transmission method of any of the embodiments described above.

In yet another aspect, a computer readable storage medium is provided, on which computer program instructions are stored, which when run on a computer (e.g. a communication device or a signal transmission device) implement the data transmission method of any of the above embodiments.

In a further aspect, a computer program product is provided, comprising computer program instructions which, when executed, implement the data transmission method of any of the embodiments described above.

According to the technical scheme provided by the embodiment of the disclosure, first indication information indicating the data transmission type is transmitted to a second node through a first node; and the first node performs data transmission with the second node based on the first indication information. Therefore, under the conditions of larger TB and more CBGs, the second node can know the data transmission type in advance, so that judgment can be made more quickly and retransmission can be prepared, feedback overhead is reduced, and meanwhile, the reliability of data retransmission is improved.

Drawings

FIG. 1 is a graph of probability statistics for the number of erroneous CBGs for different TB error probabilities when one TB partitions 8 CBGs, provided by embodiments of the present disclosure;

fig. 2 is a schematic diagram of LRC encoding according to an embodiment of the present disclosure;

Fig. 3 is a schematic architecture diagram of a communication system according to an embodiment of the disclosure;

fig. 4 is an interaction flow chart of a data transmission method according to an embodiment of the disclosure;

Fig. 5 is a schematic diagram of a data transmission process according to an embodiment of the disclosure;

Fig. 6 is a schematic diagram of another data transmission process according to an embodiment of the disclosure;

Fig. 7 is a schematic diagram of yet another data transmission process according to an embodiment of the disclosure;

fig. 8 is a schematic diagram of yet another data transmission process according to an embodiment of the disclosure;

Fig. 9 is a schematic diagram of yet another data transmission process provided in an embodiment of the present disclosure;

fig. 10 is a schematic diagram of yet another data transmission process provided in an embodiment of the present disclosure;

FIG. 11 is a schematic diagram of yet another data transmission process provided by an embodiment of the present disclosure;

fig. 12 is a schematic diagram of yet another data transmission process provided in an embodiment of the present disclosure;

Fig. 13 is a schematic diagram of yet another data transmission process provided in an embodiment of the present disclosure;

Fig. 14 is a schematic diagram of yet another data transmission process provided in an embodiment of the present disclosure;

fig. 15 is a schematic diagram of yet another data transmission process provided in an embodiment of the present disclosure;

fig. 16 is a schematic diagram of yet another data transmission process provided in an embodiment of the present disclosure;

fig. 17 is a schematic diagram of yet another data transmission process provided in an embodiment of the disclosure;

FIG. 18 is a schematic diagram of yet another data transmission process provided by an embodiment of the present disclosure;

Fig. 19 is a schematic diagram of yet another data transmission process provided in an embodiment of the present disclosure;

Fig. 20 is a schematic diagram of HARQ-ACK feedback information provided by an embodiment of the present disclosure;

fig. 21 is a schematic diagram of another HARQ-ACK feedback information provided by an embodiment of the present disclosure;

fig. 22 is a schematic diagram of still another HARQ-ACK feedback information provided by an embodiment of the present disclosure;

fig. 23 is a schematic diagram of still another HARQ-ACK feedback information provided by an embodiment of the present disclosure;

Fig. 24 is a schematic diagram of still another HARQ-ACK feedback information provided by an embodiment of the present disclosure;

Fig. 25 is a schematic diagram of still another HARQ-ACK feedback information provided by an embodiment of the present disclosure;

Fig. 26 is a schematic diagram of another HARQ-ACK feedback information provided by an embodiment of the present disclosure

Fig. 27 is a schematic diagram of yet another data transmission process provided in an embodiment of the present disclosure;

fig. 28 is a schematic diagram of yet another data transmission process provided in an embodiment of the present disclosure;

fig. 29 is a schematic diagram of yet another data transmission process provided in an embodiment of the present disclosure;

fig. 30 is a schematic diagram of yet another data transmission process provided in an embodiment of the present disclosure;

Fig. 31 is a schematic diagram of still another HARQ-ACK feedback information provided by an embodiment of the present disclosure;

Fig. 32 is a schematic diagram of still another HARQ-ACK feedback information provided by an embodiment of the present disclosure;

Fig. 33 is a schematic diagram of still another HARQ-ACK feedback information provided by an embodiment of the present disclosure;

fig. 34 is a schematic diagram of still another HARQ-ACK feedback information provided by an embodiment of the present disclosure;

fig. 35 is a schematic diagram of still another HARQ-ACK feedback information provided by an embodiment of the present disclosure;

Fig. 36 is a schematic structural diagram of a data transmission device according to an embodiment of the present disclosure;

fig. 37 is a schematic structural diagram of another data transmission device according to an embodiment of the disclosure;

fig. 38 is a schematic structural diagram of a communication device according to an embodiment of the disclosure.

Detailed Description

The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments in this disclosure, all other embodiments that a person of ordinary skill in the art would obtain without making any inventive effort are within the scope of protection of this disclosure.

In the description of the present disclosure, unless otherwise indicated, "/" means "or" and, for example, a/B may mean a or B. "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. Furthermore, "at least one" means one or more, and "a plurality" means two or more. The terms "first," "second," and the like do not limit the number and order of execution, and the terms "first," "second," and the like do not necessarily differ.

It is noted that in this disclosure, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "e.g." should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

Compared with a long term evolution (Long term evolution, LTE) system, the bandwidth of the 5G NR system is significantly larger, so that the TB can be very large when a large bandwidth is scheduled for data transmission. In order to reduce the complexity of implementation, in practical application, the input bit length of the encoder is limited to a certain extent, if the number of bits contained in one TB exceeds a threshold, the TB is divided to obtain a plurality of small CBs, and each CB block does not exceed the threshold.

In the NR system, for the Base graph 1 (bg 1) of the Low density parity check (Low DENSITY PARITY CHECK) code, the threshold of the LDPC code block division is 8448, and for the Base graph 2 (bg 2) of the LDPC code block division is 3840. If one TB is divided into a plurality of CBs, if one CB in the TB is decoded incorrectly, the whole TB is retransmitted according to the LTE processing mode, so that a large number of invalid transmissions are caused in the retransmission, and the efficiency of the system is affected.

To avoid unnecessary retransmissions of successfully decoded CBs and to account for the excessive HARQ-ACK overhead caused by the introduction of HARQ-ACK feedback for each CB, one TB is divided into N CBGs, each consisting of one or more CBs. Each CBG may use 1bit HARQ-ACK feedback information. When all CBs within a CBG are decoded correctly, the 1bit ACK associated with that CBG is fed back. Otherwise, a 1bit NACK will be fed back and the CBG needs to be retransmitted. Such CBG-based HARQ-ACK feedback may balance the retransmission efficiency and feedback overhead by configuring CBG size.

In the related protocol, when a serving sector is configured with a higher layer parameter PDSCH-codeBlockGroupTransmission, the serving sector will enable CBG transmission, and indicate that each TB supports the maximum number of CBGs through the higher layer parameter maxCodeBlockGroupsPerTransportBlock, and the maximum CBG number candidate specified in 38.331 is currently 2,4,6,8.

The base station side transmits control information to a terminal device (UE) through a physical downlink control channel (Physical downlink control channel, PDCCH), and the UE receives DCI format1_1 information related to CBG transmission, wherein the DCI format1_1 information includes a new data indicator (New data indicator, NDI), a code block group transmission information (Code block group transmission information, CBGTI) field and a code block group flushing information (Code block group flush outinformation, CBGFI) field. An NDI field in DCI is 1 bit, identifying whether data is a new transmission or a retransmission; the CBGTI field has a bit width of N _TB N, where N _TB is determined by the higher layer parameter maxNrofCodeWordsScheduledByDCI, N is based on

MaxCodeBlockGroupsPerTransportBlock determines that if N _TB = 2, N may be 4 at maximum, the first N bits in the cbgti field correspond to one TB, and the last N bits correspond to another TB; the first M bits in the CBGTI field correspond one-to-one to the first M CBGs in the TB, as the most significant bit to the least significant bit represent CBG0, CBG1, CBGM, respectively.

Initial transmission, NDI indicates new transmission, CBGTI indicates all CBGs in the TB are transmitted, and the CBG bit position corresponding to the TB is 1; upon retransmission, NDI indicates retransmission, CBGTI indicates only CBG for retransmission, CBG bit position 1 for retransmission. CBGFI is CBG clear information, the size is 1 bit, if CBGFI is set to 0, it indicates that the CBG information received before is polluted, and the CBG clear information cannot be combined with the retransmitted CBG, and the buffer needs to be cleared; if CBGFI is set to 1, this indicates that the retransmitted CBG can be combined with the previously received CBG information.

The UE receives the CBG based transmission, and needs to determine the number of CBGs M of each TB block received, m=min (N, C). Where N is the maximum CBG number per TB block, configured by higher layer signaling maxCodeBlockGroupsPerTransportBlock, C is the number of CB blocks in the TB, if M equals C, then one CB in each CBG; if M is not equal to C, the number of CBs in each CBG is determined by the following procedure.

First defineM ₁ =mod (C, M), the number of CBGs and the number of CBs contained in the CBG are determined according to the following manner.

(1) For CBG m, CB with the number mK ₁ +k is included, where k=0, 1, 2, …, K ₁-1,m＝0、1、2、…,M₁ -1.

(2) For CBG M, CB with the number M ₁K₁+(m-M₁)K₂ +k is included, where m=m ₁、M₁+1、M₁+2、…,M,k＝0、1、2、…,K₂ -1.

After the CBG is divided, determining the HARQ-ACK bit number corresponding to the CBG in one TB blockAnd the HARQ-ACK codebook contains/>Bit, ifWherein/>For maximum CBG number per TB block, the maximum CBG number is determined by higher layer parameters

MaxCodeBlockGroupsPerTransportBlock configuration, at this time, the last of the HARQ-ACK codebook is requiredThe information bits are assigned as NACK.

If all CB blocks in a certain CBG are received correctly, the UE generates ACK according to HARQ-ACK feedback information bits corresponding to the CBG; if a certain CB block in a certain CBG is received in error, the UE generates NACK in the HARQ-ACK feedback information bit corresponding to the CBG. For the reception of two TBs, the HARQ-ACK feedback information bit of the second TB is concatenated after the HARQ-ACK feedback information bit of the first TB. In addition, to handle false alarms, such as each CBG in the TB being correctly detected by the UE, but the TB cyclic redundancy check (Cyclic redundancy check, CRC) detecting errors, the UE generates a NACK feedback for each CBG in the HARQ-ACK codebook to the base station.

Exemplary, TB specific segmentation procedure is as follows:

Let the transmission bit be a ₀,a₁,a₂,a₃,…,a_A-1 and the parity bit be p ₀,p₁,p₂,p₃,…,p_L-1, where a is the size of the payload and L is the number of bits of the parity bit. Parity bits are calculated according to the rules of the protocol and appended to the downlink shared channel transport block. When a >3824, L is set to 24 bits, and the generator polynomial g _CRC24A (D) is used; otherwise, L is set to 16 bits and the generator polynomial g _CRCl6 (D) is used. The bits after CRC attachment are denoted B ₀,b₁,b₂,b₃,…,b_B-1, where b=a+l.

Wherein,

g_CRC24A(D)＝[D²⁴+D²³+D¹⁸+D¹⁷+D¹⁴+D¹¹+D¹⁰+D⁷+D⁶+D⁵+D⁴+D³+D+1],

g_CRC16(D)＝[D¹⁶+D¹²+D⁵+1]。

If B is greater than the maximum code block length Kcb, code block segmentation is needed, and 24-bit CRC check sequences are added to each segmented code block. The output bits of the code block division are denoted C _r0,c_r1,c_r2,c_r3,…,cr_(Kr-1), where 0r < C represents the code block number and K _r =k represents the number of bits in each code block.

1. Determining a maximum code block length K _cb:

For BG1, the maximum code block length is: k _cb =8448.

For BG2, the maximum code block length is: k _cb =3840.

2. Determining the number C of code blocks:

when B is less than or equal to K _cb, code block division is not required, i.e., the number of code blocks c=1, the code block length B' =b, CRC is not added, and l=0.

When B exceeds K _cb, code block division is required, the number of code blocks c= [ B/(K _cb -L) ], and the total transport block length after division is B' =b+c×l, l=24.

3. Determining the number of bits K in each code block:

K′＝B′/C；

For BG1, K _b =22; for BG2, it is necessary to determine according to the size of B: when B >640, k _b =10; when B >560, K _b =9; when B >192, K _b =8; otherwise, kb=6. Then, find the minimum Z value (denoted by Z _c) according to the relevant criteria, let K _b*Z_c be ≡K', let K=22Z _c (for BG 1) or K=10Z _c (for BG 2).

4. Performing code block segmentation and adding CRC:

When not split, no CRC is added. When the number of code blocks C >1, the input sequence is equally divided according to the number of code blocks, each segment calculates a CRC check sequence according to a generator polynomial g _CRC24B (D), and the CRC check sequence is respectively attached to each segment.

The bit sequence c _rk is calculated as follows:

wherein g _CRC24B(D)＝[D²⁴+D²¹+D⁶+D⁵ +D+1].

Statistical and theoretical analysis shows that, referring to fig. 1, the TB decoding error is caused by one to two CBG decoding errors in the case of high probability. If the transmission efficiency is affected by retransmission of the entire TB, in order to improve the retransmission efficiency, the transmission efficiency can be improved by adopting a retransmission part CBG mode.

One possible method for retransmission is to use a packet coding operation. Packet coding is a technique that adds redundant information in data transmission to improve reliability and error correction capability. Common packet coding methods include Cauchy-based systematic RS (Reed-Solomon) coding, vandermonde-based RS coding, repair-local code (Locally repairable code, LRC) coding, exclusive-or operation, etc.

The principle of RS coding based on the Cauchy system RS coding is described as follows:

Assuming that the number of input source data is k, Each source data p bytes, and the data table after the encoding matrix is/>Wherein the method comprises the steps ofThe method is characterized in that the method comprises the steps of combining a unit matrix and a cauchy matrix, and after coding, n data are provided, and the number of check data is n-k.

In decoding, for n code symbols to be transmitted, the receiving end receives k code symbols, wherein v source symbols are erased, the number of the received source symbols is k-v, the index number of the received source symbols is set to be { r ₀,r_1,…,r_k-1 }, the index number of the non-received source symbols is { r _0,r1,…,r_v-1 }, and the index of the received check symbols is { t ₀,t₁,…,t_v-1 }. At the receiving end, the coding matrix Gk is reconstructed, and the coding matrix can be represented by the following formula:

Wherein,

Gk has a regular format, then the inverse of Gk can be calculated by:

Wherein,

B^-1＝[d_i,j]_{i,j＝0,1,…,v-1}’

a_m＝{∏_i<m(t_i-t_m)}{∏_i>m(t_m-t_i)}

b_m＝{∏_i<m(r_i-r_m)}{∏_i>m(r_m-r_i)}

e_m＝∏_i(t_m+r_i)

Domain operations are not considered.

The principle of RS coding based on vandermonde RS coding is described as follows:

any sub-matrix of the Vandermonde matrix is a reversible matrix, and one m rows and n columns of the Vandermonde matrix is defined as follows:

wherein a is different from 0.

(1) Vandermonde-based system RS erasure codes

First, for the encoding process, assuming that the dimension of the input data is k (i.e., the number of source symbols is k), and the values of { a _1,a₂,…,a_n } are {1 _, 2, …, k } respectively, the vandermonde matrix is:

the coding matrix G of the system RS erasure code based on Vandermonde is the combination of the identity matrix I and the Vandermonde matrix V1, and the product of the coding matrix G and the input data D is the coded data, as shown in the following formula:

the operations among the elements in the above formula are four operations under a finite field, the coding complexity is O (k x m), wherein k is the dimension of the original data, and m is the dimension of the check data.

Then, for the decoding process, the original data can be directly solved by Gaussian elimination according to the receiving encoding matrix, and simplified decoding can be performed according to the characteristics of the vandermonde matrix. Simplified decoding based on the Vandermonde system RS erasure code will be mainly described herein.

Assuming that the encoding process is shown in the following formula, the encoded data length generated by k pieces of original data d= [ D ₁,d₂,…,d_k]^T ] and m pieces of check data r= [ R ₁,r₂,…r_m ] is k+m, and the encoded data is represented as e= [ D ^T,R^T]^T ].

When the encoded data E passes through the erasure channel, v pieces of original data are erased, and v pieces of parity data need to be additionally received, and under the condition of receiving v pieces of parity data, the erased data can be calculated by the following formula:

R_I＝R_e-V₁′*D_e

D_r＝(V₁″)^-1*R_I

Wherein D _e represents the received raw data; v ₁' represents one submatrix of the vandermonde matrix, corresponding to V check matrices; r _e represents the V pieces of check data; v ₁ "represents a sub-matrix of columns of V ₁' that correspond to the locations where the original data was erased.

System RS encoding or vandermonde-based RS encoding process that represents cauchy with formula simplification:

[R₁,R₂,…R_n-k]＝f₁(n,k)

Wherein n is the number of encoded data, k is the number of original data, R _i, i=1, 2,3 …, and n-k is the output check data.

LRC coding: fig. 2 shows an LRC encoding schematic diagram, where D ₀,...,D₅ is 6 source data blocks, and is divided into two parts, where in the first part, D ₀、D₁ and D ₂ are bitwise xored to obtain a local check block L ₀, and in the second part, D ₃、D₄ and D ₅ are bitwise xored to obtain two global check blocks in which the local check blocks L ₁.P₀ and P ₁ are both involved in the 6 source data blocks.

When a single point of failure occurs, e.g., D ₀ fails, reading a total of 3 data of D ₁、D₂ and L ₀ can complete the repair of D ₀. If the RS (10, 6) codes are used, the data of 6 nodes need to be read to finish the data repair.

When a multipoint failure occurs, for example, two node failures occur, then whether the two failures are distributed in a single local or in two local, the data of 6 nodes needs to be read to complete the data repair.

The repair set of the above example may be expressed as:

if the information D ₀ fails, the method can be used To restore, repair locality r=3, repair availability t=1 of D ₀. Considering that only one block fails in a stripe under the failure condition exceeding 98%, the LRC can effectively reduce the cost of data repair, and is a coding scheme which balances the storage cost and the repair cost.

However, LRC is not a very large distance separable code (Maximum distance separable, MDS) code, such as the code (10,6,2) described above, but with four checks, cannot correct all 4 node errors, e.g., D ₀,D₁,D₂,L₀ errors for a total of 4 data blocks, and cannot recover the first three data blocks by P ₀ and P ₁.

If the number k of source data blocks is not an integer multiple of the number r1 of local check data blocks, the local check data blocks are generated as follows: the first r1-1 parts each containIndividual source data blocks, last local inclusion/>Source data blocks. For example, when k=35, r1=4, the first 3 parts contain 9 source data blocks, respectively, and the last part contains 8 data blocks.

The LRC encoding process is simplified by the formula:

[L₀,L₁,…Lr_1-1,P₁,P₂,…P_r2]＝f₂(n,k，r2)

Where n is the number of encoded data blocks n=k+r2+r1, k is the number of original data blocks, r1 is the number of local check blocks, L _i, i=0, 1.

Exclusive-or operation assuming that each CBG contains an equal number of bits (aligned by zero padding if not equal), e.g. 4 CBGs (a, B, C, D), an exclusive-or operation is performed to obtain a check block p=a #, B #, C #, D, where # -represents the exclusive-or operation.

When the TB is larger, the transmission is performed in a CBG mode, the configured CBG number is larger, and when the process number is larger, the overall feedback overhead is larger and the retransmission reliability is not necessarily ensured.

In view of this, the present disclosure proposes a data transmission method of transmitting, by a first node, first indication information indicating a data transmission type to a second node; and carrying out data transmission with the second node based on the first indication information. Therefore, under the conditions of larger TB and more CBGs, the second node can know the type of data transmission earlier, so that judgment can be made faster and retransmission can be prepared, feedback overhead is reduced, and meanwhile, the reliability of retransmission is improved.

The data transmission method provided by the embodiment of the disclosure can be applied to systems with various communication modes. For example, the system to which the data transmission method provided by the embodiments of the present disclosure may be applicable includes, but is not limited to, an LTE system, various versions based on LTE evolution, a 5G system, and other communication systems. In addition, the data transmission method provided by the embodiment of the disclosure may also be applicable to future-oriented communication systems (e.g., 6G communication systems) and the like.

The network architecture of the mobile communication network (including but not limited to 3g,4g,5g and future mobile communication networks) in embodiments of the present disclosure may include at least a first communication node and a second communication node. It should be appreciated that in this example, the first communication node may be a network-side device (including, but not limited to, a base station, for example) and the second communication node may be a terminal-side device (including, but not limited to, a terminal, for example) in the downlink. Of course, in the uplink, the first communication node may be a terminal-side device, and the second communication node may be a network-side device. In the case where both communication nodes are device-to-device communications, both the first communication node and the second communication node may be base stations or terminals. The first communication node and the second communication node may be abbreviated as first node and second node, respectively.

By way of example, taking a first communication node as a base station and a second communication node as a terminal, as shown in fig. 3, a communication system according to an embodiment of the present disclosure is provided, where the communication system includes a terminal 10 and a base station 20. The terminal 10 and the base station 20 may be one or more, and are not limited in number.

In some embodiments, the base station 20 provides wireless access services for the terminal 10. One base station 20 provides at least one service coverage area (also referred to as a cell). The terminal 10 entering the area may communicate with the base station 20 through wireless signals to thereby receive the wireless access service provided by the base station 20.

In some embodiments, the Base Station (BS) may be a long term evolution (Long term evolution, LTE), a Base station or evolved Base station (Evolutional node B, eNB or eNodeB) in a long term evolution enhanced (Long term evolution advanced, LTEA), a Base station device in a 5G network, or a Base station in a future communication system, etc., which may include various macro Base stations, micro Base stations, home Base stations, wireless remote, reconfigurable intelligent surface (Reconfigurable intelligent surfaces, RISs), routers, relays, TRP, wireless fidelity (WIRELESS FIDELITY, WIFI) devices, etc., various network side devices.

In some embodiments, the terminal may be a device with wireless transceiving functionality. The terminals may be mobile phones (mobile phones), tablet computers (Pad), computers with wireless transceiving functionality, virtual Reality (VR) terminals, augmented reality (Augmented reality, AR) terminals, wireless terminals in industrial control (Industrial control), wireless terminals in unmanned (SELF DRIVING), wireless terminals in telemedicine (Remote media), wireless terminals in smart grid (SMART GRID), wireless terminals in transportation security (Transportation safety), wireless terminals in smart city (SMART CITY), wireless terminals in smart home (smart home), etc. Embodiments of the present disclosure are not limited to application scenarios. A terminal may also be referred to as a User, user Equipment (UE), access terminal, UE unit, UE station, mobile station, remote terminal, mobile device, UE terminal, wireless communication device, UE agent, UE device, or the like, as embodiments of the present disclosure are not limited in this respect.

It should be noted that fig. 3 is merely an exemplary frame diagram, the number of devices included in fig. 3 is not limited, the names of the respective devices are not limited, and the communication system may include other devices, such as core network devices, in addition to the devices shown in fig. 3.

The application scenario of the embodiments of the present disclosure is not limited. The system architecture and the service scenario described in the embodiments of the present disclosure are for more clearly describing the technical solutions of the embodiments of the present disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of a new service scenario, the technical solutions provided by the embodiments of the present disclosure are applicable to similar technical problems.

The embodiment of the disclosure provides a data transmission method. As shown in fig. 4, the method comprises the steps of:

s101, a first node transmits first indication information indicating a data transmission type; correspondingly, the second node receives first indication information indicating the data transmission type sent by the first node.

In some embodiments, the first indication information is transmitted in uplink scheduling information; or the first indication information is transmitted in the downlink scheduling information.

In some embodiments, the first indication information is carried in downlink control information (Downlink control information, DCI).

In some embodiments, before the first node transmits the first indication information indicating the data transmission type, the first node receives hybrid automatic repeat request HARQ-ACK feedback information sent by the second node; or after the first node transmits the first indication information indicating the data transmission type, the first node receives the HARQ-ACK feedback information sent by the second node; or the first node receives the HARQ-ACK feedback information sent by the second node at the same time of transmitting the first indication information indicating the data transmission type by the first node.

In some embodiments, HARQ-ACK feedback information is used to indicate whether the transport block TB was transmitted successfully.

In some embodiments, HARQ-ACK feedback information is used to indicate whether each code block group CBG in a transport block TB was transmitted successfully.

In some embodiments, the first indication information includes data retransmission type indication information and/or a CBG indication corresponding to the packet encoded data.

In some embodiments, the data retransmission type includes at least one of: a first retransmission type, a second retransmission type, a third retransmission type, a fourth retransmission type; the first retransmission type, the second retransmission type and the third retransmission type correspond to different packet coding retransmission, and the fourth retransmission type is retransmission without packet coding.

In some embodiments, the first retransmission type is retransmission data comprising retransmission packets obtained via an exclusive or operation between data; the second retransmission type is used for retransmitting data and comprises retransmission packets obtained by the data through RS coding operation; the third retransmission type is used for retransmitting data and comprises retransmission packets obtained by the data through LRC coding operation; the fourth retransmission type includes retransmitted CBG or TB for retransmission data.

Wherein the retransmission packet comprises a check packet (or check block), an exclusive-or packet or other defined data packet.

Illustratively, the base station may indicate the data retransmission type by one of the following:

(1) Indicated by a newly added field in the DCI, the field size is 2 bits, for example: 00 is used to represent a first retransmission type, 01 is used to represent a second retransmission type, 10 is used to represent a third retransmission type, and 11 is used to represent a fourth retransmission type.

(2) Indicated by CBGTI in the DCI, CBGTI indicates that the states are other than all 0 or all 1 states. For example: when 4 CBGs are indicated by retransmission, bit indication bit in CBGFI is 1000, indicating the first retransmission type, bit indication bit in CBGFI is 0100, indicating the second retransmission type, and bit indication bit in CBGFI is 0010, indicating the third retransmission type.

(3) By jointly indicating CBGFI and CBGTI in DCI, for example, CBGFI is set to 0, cbgti indicates that the state is other than the all 0 or all 1 state. For example: CBGFI is set to 0, indicating a retransmission packet, a bit indication of 1000 in CBGFI indicates a first retransmission type, a bit indication of 0100 in CBGFI indicates a second retransmission type, and a bit indication of 0010 in CBGFI indicates a third retransmission type.

(4) The RRC reset includes a data retransmission type, and further may include CBG information. The CBG information includes a specific location of the CBG in the TB for which transmission failed.

In some embodiments, the CBG indication corresponding to the packet encoded data includes at least one of:

All CBGs in TB;

the first half CBG in TB;

the second half of CBG in TB;

The first half CBG in TB and the second half CBG in TB;

And selecting part of CBGs in the TB to carry out packet coding operation according to indexes of each CBG in the TB and intervals, and obtaining retransmission packets, wherein the intervals are used for representing absolute values of differences between indexes of two adjacent CBGs in the selected part of CBGs.

In some embodiments, the CBG in the TB that failed to transmit belongs to the first half of the CBGs in the TB, and the CBG corresponding to the packet encoded data is indicated as all CBGs in the TB.

S102, the first node and the second node perform data transmission based on the first indication information.

In some embodiments, the first node transmits data to the second node based on the first indication information; or based on the first indication information, the first node receives the data transmitted by the second node.

In some embodiments, the first node performs a packet encoding operation on at least one CBG including a CBG that failed to transmit, to obtain a retransmission packet; the first node sends a retransmission packet to the second node.

In some embodiments, the second node decodes the retransmission data according to the first indication information, detects the correct CBG according to the last transmission and retransmits the data, and obtains the CBG with failed transmission.

For example, the maximum CBG number configured with the higher layer parameters (the maximum CBG number configured with the higher layer parameters is maxCodeBlockGroupsPerTransportBlock) is 4, and the TB transmitted by the current process has 8 CBs and is divided into 4 CBGs, namely CBG0, CBG1, CBG2 and CBG3, and each CBG contains 2 CBs. When the initial transmission (initial transmission is INITIAL TRANSMISSION), CBGTI field value in DCI1-1 is [1111], new transmission data indicated by NDI and current HARQ-ACK process number, UE receives signals of control channel and shared channel, carries out exclusive OR decoding on the transmission block, when CB2 is a decoding error CB or CB2 CRC detection error (decoding error CB or CB CRC detection error is FAILED CB), HARQ-ACK FEEDBACK of CBG1 is NACK, and HARQ-ACK FEEDBACK information (HARQ-ACK FEEDBACK information is HARQ-ACK FEEDBACK) of all CBG is [ ANAA ] based on the process FEEDBACK to the base station.

Assuming that CBGs corresponding to the packet encoded data indicate all CBGs in the TBs transmitted by the current process, after the base station successfully receives HARQ-ACK feedback information of the process, specific operations performed by the base station and the terminal may refer to example 1 or example 2.

Example 1, as shown in fig. 5, the base station performs an exclusive or operation on all CBG blocks (if the bit numbers are not equal, zero padding alignment) to obtain a check block P (p=cbg0 ++cbg1 ++cbg2 ++cbg3), and transmits the check block P and code block group TRANSMISSION information CBGTI to the UE (denoted RE-TRANSMISSION: pand CBGTI [0100 ]); and the UE detects the check block, if the check block is detected correctly, performing exclusive OR operation on the CBG0, CBG2 and CBG3 block information which are detected correctly according to the last transmission to obtain CBG1 block information, and feeding back HARQ-ACK feedback information [ AAAA ] to the base station.

Example 2, as shown in fig. 6, the base station performs RS encoding operation on all CBG blocks (if the bit numbers are not equal, zero padding alignment) to obtain one check block R ₁(R₁＝f₁ (5, 4)), and transmits the check block R ₁ and code block group TRANSMISSION information CBGTI to the UE (denoted as RE-TRANSMISSION: R ₁ and CBGTI [0100 ]); and the UE detects the check block, if the check block is detected correctly, and performs RS decoding according to the CBG0, CBG2 and CBG3 block information which are detected correctly in the last transmission, so as to obtain CBG1 block information, and feeds back HARQ-ACK feedback information [ AAAA ] to the base station.

In some embodiments, the CBG in the TB that failed to transmit belongs to the first half CBG in the TB, and the CBG corresponding to the packet encoded data is indicated as the first half CBG in the TB.

With continued reference to the description in example one, since CBG1 belongs to the first half CBG in the TB transmitted by the current process, assuming that the CBG corresponding to the packet encoded data is indicated as the first half CBG in the TB, after the base station successfully receives the HARQ-ACK feedback information of the process, the specific operations performed by the base station and the terminal may refer to example 3 or example 4.

In example 3, as shown in fig. 7, the base station needs to retransmit CBG1 according to the HARQ-ACK feedback information, CBG1 performs an exclusive or operation on CBG0 and CBG1 (if the number of bits is not equal, zero padding alignment) of the CBG blocks of the first half to obtain a check block P (p=cbg0_cbg1), and transmits the check block P and code block group TRANSMISSION information CBGTI to the UE (denoted as RE-TRANSMISSION: pand CBGTI [0100 ]), NDI in DCI is flipped compared with the previous same process, and if the detection is correct, the UE performs an exclusive or operation on the block information of CBG0 detected correctly according to the previous TRANSMISSION to obtain CBG1 block information, and feeds back HARQ-ACK feedback information [ AAAA ] to the base station.

Example 4, as shown in fig. 8, the base station divides all CBG blocks into 2 parts, including the first half CBG in the TB and the second half CBG in the TB, respectively, 2 CBGs per part; performing LRC encoding on the first half CBG in the TB to obtain a local check block L ₀, and performing LRC encoding on the second half CBG in the TB to obtain a local check block L1; LRC encoding all CBGs in the TB to obtain 2 global check blocks P ₁,P₂, and transmitting the local check blocks L ₀ and code block group TRANSMISSION information CBGTI to the UE (denoted RE-TRANSMISSION: L ₀ and CBGTI [0100 ]); and the UE detects the check block, if the check block is detected correctly, performing exclusive OR operation according to the CBG0 block information which is detected correctly in the last transmission to obtain CBG1 block information, and feeding back HARQ-ACK feedback information [ AAAA ] to the base station.

In some embodiments, the CBG in the TB that failed to transmit belongs to the second half CBG in the TB, and the CBG corresponding to the packet encoded data is indicated as the second half CBG in the TB.

In the second example, the maximum CBG number configured by the higher layer parameter is 4, the TB transmitted by the current process has 8 CBs, which are divided into 4 CBGs, namely CBG0, CBG1, CBG2 and CBG3, each CBG contains 2 CBs, when the initial transmission is performed, the CBGTI field value in DCI1-1 is [1111], the new transmission data indicated by NDI, and the current HARQ process number, the UE receives the signals of the control channel and the shared channel, detects and decodes the transmission block, and when only CB5 decoding errors or CB5 CRC detection errors exist, the HARQ-ACK feedback of the CBG2 is NACK, and the HARQ-ACK feedback information [ AANA ] of all CBGs is fed back to the base station based on the process.

In example 5, as shown in fig. 9, the base station performs an exclusive or operation on the second half CBG blocks CBG2 and CBG3 (if the number of bits is not equal, zero padding is aligned) to obtain a check block P (p=cbg2, CBG 3), transmits the check block P and code block group TRANSMISSION information CBGTI to the UE (denoted as RE-TRANSMISSION: pand CBGTI [0100 ]), and the NDI in the DCI is inverted compared with the last same procedure to indicate retransmission, and the UE detects the check block, if the detection is correct, detects correct CBG3 block information according to the last TRANSMISSION, obtains CBG2 block information, and feeds back HARQ-ACK feedback information [ AAAA ] to the base station.

Example 6, as shown in fig. 10, the base station divides all CBG blocks into 2 parts, including the first half CBG in the TB and the second half CBG in the TB, respectively, 2 CBGs per part; performing LRC encoding on the first half CBG in the TB to obtain a local check block L ₀, and performing LRC encoding on the second half CBG in the TB to obtain a local check block L ₁; performing LRC coding on all CBGs in the TB to obtain 2 global check blocks P ₁,P₂; transmitting the local check block L ₁ and code block group TRANSMISSION information CBGTI to the UE (recorded as RE-TRANSMISSION: L ₁ and CBGTI [0100 ]) to transmit to the UE, detecting the check block by the UE, if the check block is detected correctly, and detecting the correct CBG3 block information with the last TRANSMISSION to obtain CBG2 block information, and feeding back HARQ-ACK feedback information [ AAAA ] to the base station.

In some embodiments, the CBGs in the TB that fail to transmit include a first half CBG in the TB and a second half CBG in the TB, and the CBGs corresponding to the packet encoded data are indicated as the first half CBG in the TB and the second half CBG in the TB.

In example three, the maximum CBG number configured by the higher layer parameters is 8, the TB block transmitted by the current process has 8 CBs, and is divided into 8 CBGs, namely CBG0, CBG1, CBG2, CBG3, CBG4, CBG5, CBG6, and CBG7, each CBG contains 1 CB, when the initial transmission is performed, the CBGTI field value in DCI1-1 is [11111111], the new transmission data indicated by NDI, and the current HARQ process number, the UE receives signals of the control channel and the shared channel, detects and decodes the transport block, when CB2, CB6 decoding errors or CB2 CRC, CB6 CRC detection errors, the HARQ-ACK feedback of CBG2, CBG6 is NACK, and HARQ-ACK feedback information [ AANAAANA ] of all CBGs is fed back to the base station based on the process.

For example 7, as shown in fig. 11, the base station performs exclusive or coding on the first half of CBG blocks, CBG0, CBG1, CBG2, CBG3 (if the number of bits is not equal, zero padding alignment) to obtain check blocks P ₁(P₁ =cbg0, CBG1, CBG2, CBG3, and performs exclusive or coding on the second half of CBG blocks, CBG4, CBG5, CBG6, CBG7 to obtain check blocks P ₂(P₂ =cbg4, CBG5, CBG6, CBG 7), and transmits the check blocks P ₁,P₂ to the UE, and the UE performs detection on the check blocks, such as detection is correct, P ₁ is decoded together with CBG0, CBG1, CBG3 block information, to obtain CBG2 block information, P ₂ is decoded together with CBG4, CBG5, CBG7 block information, and feedback HARQ-ACK information [ AAAAAAAA ] is decoded to the base station.

Example 8, as shown in fig. 12, the base station divides all CBG blocks into 2 parts, including the first half CBG in the TB and the second half CBG in the TB, respectively, 2 CBGs per part; performing LRC encoding on the first half CBG in the TB to obtain a local check block L ₀, and performing LRC encoding on the second half CBG in the TB to obtain a local check block L ₁; performing LRC coding on all CBGs in the TB to obtain 2 global check blocks P ₁,P₂; and transmitting the two local check blocks L ₁,L₂ to the UE; the UE detects the check block; if the detection is correct, performing exclusive-or operation on the L ₁ and the CBG0, the CBG1 and the CBG together to obtain CBG2, L ₂ and the CBG0, the CBG1 and the CBG together to obtain CBG6, and feeding back HARQ-ACK feedback information [ AAAAAAAA ] information to the base station.

In some embodiments, the number of CBGs in the TB that fail to transmit is greater than a first threshold and the ratio between the number of CBGs in the TB and the CBGs in the TB that fail to transmit is less than or equal to a second threshold, the CBGs for which the packet encoded data corresponds being indicated as all CBGs in the TB.

As shown in fig. 13, the maximum CBG number of the high-level parameter configuration is 4, and the TB block transmitted by the current process has 8 CBs, which are divided into 4 CBGs, namely CBG0, CBG1, CBG2 and CBG3, and each CBG contains 2 CBs; during initial transmission, CBGTI field values in DCI1-1 are [1111], new transmission data indicated by NDI and current HARQ process numbers, a UE receives signals of a control channel and a shared channel, and detects and decodes a transmission block; when CB2, CB5 decoding error or CB2CRC, CB5 CRC detection error, HARQ-ACK feedback of CBG1 and CBG2 is NACK, feeding back HARQ-ACK feedback information [ ANNA ] of all CBG to the base station based on the process; after the base station successfully receives the HARQ-ACK feedback information of the process, performing RS operation on all CBG blocks (if the bit numbers are unequal, zero padding is aligned) to obtain a check block R ₁,R₂, and transmitting the check block R ₁,R₂ to the UE; and the UE detects the check block, if the check block is detected correctly, detecting correct CBG0 and CBG3 block information according to the last transmission to obtain CBG1 and CBG2 block information, and feeding back HARQ-ACK information [ AAAA ] to the base station.

As shown in fig. 14, the maximum CBG number of the higher layer parameter configuration is 8, the TB block transmitted by the current process has 8 CBs, which are divided into 8 CBGs, CBG0, CBG1, CBG2, CBG3, CBG4, CBG5, CBG6, CBG7, each CBG contains 1 CB, and at the initial transmission, the CBGTI field value in DCI1-1 is [11111111], the new transmission data indicated by NDI, and the current HARQ process number; the UE receives signals of a control channel and a shared channel, detects and decodes a transmission block, and when CB2, CB4, CB6, CB7 decoding errors or CB2 CRC, CB4 CRC, CB6CRC and CB7 CRC detection errors are detected, HARQ-ACK feedback of CBG2, CBG4, CBG6 and CBG7 is NACK; based on the process, feeding back HARQ-ACK feedback information [ AANANANN ] of all CBGs to the base station, after the base station successfully receives the HARQ-ACK feedback information of the process, carrying out RS coding on all CBG blocks (if the bit numbers are unequal, zero padding alignment) to obtain a check block R ₁,R₂,R₃,R₄, and transmitting the check block R ₁,R₂,R₃,R₄ to the UE; and the UE detects the check blocks, if the check blocks are detected correctly, the correct CBG0, CBG1, CBG3 and CBG5 block information is detected according to the last transmission, and the CBG2, CBG4, CBG6 and CBG7 block information is obtained by decoding together, and HARQ-ACK feedback information [ AAAAAAAA ] is fed back to the base station.

As shown in fig. 15, the maximum CBG number of the higher layer parameter configuration is 8, the TB block transmitted by the current process has 8 CBs, which are divided into 8 CBGs, CBG0, CBG1, CBG2, CBG3, CBG4, CBG5, CBG6, CBG7, each CBG contains 1 CB, and at the initial transmission, the CBGTI field value in DCI1-1 is [11111111], the new transmission data indicated by NDI, and the current HARQ process number; the UE receives signals of a control channel and a shared channel, detects and decodes a transmission block, and the HARQ-ACK feedback of CB2, CB4, CB6, CB7 decoding errors or CB2 CRC, CB4 CRC, CB6 CRC, CB7 CRC detection errors, CBG2, CBG4, CBG6 and CBG7 is NACK; based on the process, feeding back HARQ-ACK feedback information [ AANANANN ] of all CBGs to the base station, after the base station successfully receives the HARQ-ACK feedback information of the process, dividing all CBG blocks into 4 parts, carrying out LRC coding on 2 CBGs of each part to obtain 4 local check blocks L ₀,L₁,L₂,L₃ and 2 global check blocks P ₁,P₂, and transmitting the local check blocks L ₁,L₂ and the global check blocks P ₁ to UE; and the UE detects the check blocks, if the detection is correct, detecting correct CBG0, CBG2 and CBG3 block information according to the last transmission to obtain CBG2, CBG4, CBG6 and CBG7 block information, and feeding back HARQ-ACK feedback information [ AAAAAAAA ] to the base station.

In some embodiments, HARQ-ACK feedback information is used to indicate CBG error conditions in the TBs.

In some embodiments, the HARQ-ACK feedback information has a first value, which is used to indicate that the TB transmission is successful;

the HARQ-ACK feedback information also includes one or more other values, each value representing at least one of:

For indicating a CBG transmission failure;

For indicating two CBG transmission failures;

The number of CBGs used for representing transmission failure is smaller than or equal to a first threshold value;

The number used for representing transmission failure is larger than a first threshold value;

The ratio between the CBG used to represent transmission failure and the number of CBGs in the TB is less than or equal to a second threshold;

a ratio between the CBG used to indicate transmission failure and the number of CBGs in the TB is greater than a second threshold;

for representing a data retransmission type, the data retransmission type comprising a retransmission based on packet coding;

for indicating that there is a CBG error in the first half of CBGs in the TB;

For indicating CBG errors in the latter half of CBGs in the TB;

For indicating that CBGs in the TB have errors according to CBG indexes;

for indicating that no physical shared channel was received;

For indicating TB errors.

For example, a value of 00 for HARQ-ACK feedback information is used to indicate that the TB transmission is successful; the values of the HARQ-ACK feedback information are 01 and 10, and the packet coding operation corresponding to the data retransmission type is expressed as exclusive OR operation; or the values of the HARQ-ACK feedback information are 01 and 10, and the packet coding operation corresponding to the data retransmission type is represented as RS coding; or the values of the HARQ-ACK feedback information are 01 and 10, and the packet coding operation corresponding to the data retransmission type is represented as LRC coding; or the value of the HARQ-ACK feedback information is 01 and is used for indicating that the packet coding operation corresponding to the data retransmission type is exclusive OR operation, and the value of the HARQ-ACK feedback information is 10 and is used for indicating that the packet coding operation corresponding to the data retransmission type is RS coding; or the value of the HARQ-ACK feedback information is 01 and is used for indicating that the packet coding operation corresponding to the data retransmission type is exclusive OR operation, and the value of the HARQ-ACK feedback information is 10 and is used for indicating that the packet coding operation corresponding to the data retransmission type is LRC coding; or the value of the HARQ-ACK feedback information is 01 and is used for representing that the packet coding operation corresponding to the data retransmission type is LRC coding, and the value of the HARQ-ACK feedback information is 10 and is used for representing that the packet coding operation corresponding to the data retransmission type is RS coding; or the value of the HARQ-ACK feedback information is 01 and is used for representing that the packet coding operation corresponding to the data retransmission type is RS coding, and the value of the HARQ-ACK feedback information is 10 and is used for representing that the packet coding operation corresponding to the data retransmission type is LRC coding.

For example, a value of 00 for HARQ-ACK feedback information indicates feedback ACK, retransmission of a new packet; a value of 01 of the HARQ-ACK feedback information indicates packet coding operation; a value of 10 for the HARQ-ACK feedback information indicates that PDSCH is not received; a value of 11 for HARQ-ACK feedback information indicates NACK, retransmitting the entire TB block.

In some embodiments, the HARQ-ACK feedback information has a first value, which is used to indicate that the TB transmission is successful; the value of the HARQ-ACK feedback information is a second value and is used for indicating that one CBG transmission fails; the HARQ-ACK feedback information has a third value, which is used to indicate that two CBG transmissions failed.

In some embodiments, the HARQ-ACK feedback information has a first value, which is used to indicate that the TB transmission is successful; the value of the HARQ-ACK feedback information is a second value, and the number of CBGs used for indicating transmission failure is smaller than or equal to a first threshold value; the value of the HARQ-ACK feedback information is a third value, and the value is used for indicating that the number of transmission failures is larger than a first threshold value and the ratio between the CBG of the transmission failures and the number of CBGs in the TB is smaller than or equal to a second threshold value; the HARQ-ACK feedback information has a fourth value, and is used to indicate that a ratio between the CBG with failed transmission and the number of CBGs in the TB is greater than a second threshold.

For example, based on the extended HARQ-ACK feedback information, specifically, the ACK/NACK information of each CBG is obtained and combined, and the extended HARQ-ACK information is fed back to the transmitting end. The 1-bit HARQ-ACK feedback information is extended to 2 bits. The extended HARQ-ACK feedback information is used in the case where the higher layer parameter maxCodeBlockGroupsPerTransportBlock is equal to or greater than 4, and the extended HARQ-ACK feedback information has the following centralized representation:

00 indicates that the transmission of the transmission block is correct, and the transmitting end does not need to retransmit information;

maxCodeBlockGroupsPerTransportBlock is configured as 4, 01 is used to represent 1 CBG transmission failure case, and 10 is used to represent 2 CBG transmission failure cases. maxCodeBlockGroupsPerTransportBlock when the configuration is greater than 4, 01 is used for indicating that the number of CBG transmission failures is less than or equal to a first threshold; 10 is used for indicating that the CBG transmission failure number is larger than a first threshold value and the ratio is smaller than or equal to a second threshold value; 11 is used to indicate that the CBG transmission failure rate is greater than the second threshold.

In some embodiments, the HARQ-ACK feedback information has a first value, which is used to indicate that the TB transmission is successful; the value of the HARQ-ACK feedback information is a second value, which is used for indicating that the TB transmission fails and the packet coding retransmission is expected, or the number of CBGs used for indicating the transmission failure is smaller than or equal to a first threshold, or the number of CBGs used for indicating the transmission failure is 1;

The value of the HARQ-ACK feedback information is a third value and is used for indicating that the physical shared channel is not received;

The value of the HARQ-ACK feedback information is a fourth value, which is used to indicate that the TB transmission fails.

Illustratively, a value of 00 for the HARQ-ACK feedback information indicates that the TB transmission is successful; the value of the HARQ-ACK feedback information is 01, which indicates that the TB transmission fails and the packet coding retransmission is expected, or the number of CBGs used for indicating the transmission failure is smaller than or equal to a first threshold value, or the number of CBGs used for indicating the transmission failure is 1; a value of 10 for the HARQ-ACK feedback information indicates that PDSCH is not received; a value of 11 for the HARQ-ACK feedback information indicates that the TB transmission failed, retransmitting the entire TB block.

As shown in fig. 16, the maximum CBG number of the higher-layer parameter configuration is 4, and the TB block transmitted by the current process has 8 CBs, which are divided into 4 CBGs, namely CBG0, CBG1, CBG2, and CBG3, and each CBG contains 2 CBs; during initial transmission, CBGTI field values in DCI1-1 are [1111], new transmission data indicated by NDI and current HARQ process numbers, a UE receives signals of a control channel and a shared channel, and detects and decodes a transmission block; when only CB2 decoding errors or CB2CRC detection errors exist, the HARQ-ACK feedback of the CBG1 is NACK, and HARQ-ACK feedback information [01] of all CBGs is fed back to the base station based on the process; after the base station successfully receives the HARQ-ACK feedback information of the process, performing exclusive OR operation on all CBG blocks (if the bit numbers are unequal, zero padding is aligned) to obtain a check block P, and transmitting the check block P to the UE; and the UE detects the check block, if the check block is detected correctly, detecting correct CBG0, CBG2 and CBG3 block information according to the last transmission to obtain CBG1 block information, and feeding back HARQ-ACK feedback information [00] to the base station.

Example eight, as shown in fig. 17. The maximum CBG number of the high-level parameter configuration is 4, the TB block transmitted by the current process has 8 CBs, and the TB block is divided into 4 CBGs, namely CBG0, CBG1, CBG2 and CBG3, and each CBG comprises 2 CBs; during initial transmission, CBGTI field values in DCI1-1 are [1111], new transmission data indicated by NDI and the current HARQ process number; the UE receives signals of a control channel and a shared channel, detects and decodes a transmission block, and feeds back the expanded HARQ-ACK feedback information [01] to the base station based on the process when only CB2 decoding errors or CB2CRC detection errors are detected, wherein the HARQ-ACK feedback of the CBG1 is NACK; after the base station successfully receives the extended HARQ-ACK feedback information of the process, performing RS coding on all CBG blocks (if the bit numbers are unequal, zero padding is aligned) to obtain a check block R ₁, and transmitting the check block R ₁ to the UE; and the UE detects the check block, if the check block is detected correctly, and decodes the CBG0, CBG2 and CBG3 block information which are detected correctly according to the last transmission to obtain CBG1 block information, and feeds back the expanded HARQ-ACK feedback information [00] to the base station.

Example nine, as shown in fig. 18. The maximum CBG number of the high-level parameter configuration is 4, the TB block transmitted by the current process has 8 CBs, and the TB block is divided into 4 CBGs, namely CBG0, CBG1, CBG2 and CBG3, and each CBG comprises 2 CBs; during initial transmission, CBGTI field values in DCI1-1 are [1111], new transmission data indicated by NDI and the current HARQ process number; the UE receives signals of a control channel and a shared channel, detects and decodes a transmission block, and feeds back expanded HARQ-ACK feedback information [10] to a base station based on the process, wherein the HARQ-ACK feedback information of CBG1 and CBG2 is NACK; after the base station successfully receives the extended HARQ-ACK feedback information of the process, performing RS coding operation on all CBG blocks (if the bit numbers are unequal, zero padding is aligned) to obtain check blocks, obtaining check blocks R ₁,R₂, transmitting 2 check blocks R ₁,R₂ to the UE, and detecting the two check blocks by the UE; if the detection is correct, detecting correct CBG0 and CBG3 block information according to the last transmission, and performing RS decoding together to obtain CBG1 and CBG2 block information, and feeding back HARQ-ACK feedback information [00] information to the base station.

Example ten, as shown in fig. 19, the maximum CBG number of the higher layer parameter configuration is 8, the TB block transmitted by the current process has 8 CBs, and is divided into 8 CBGs, which are CBG0, CBG1, CBG2, CBG3, CBG4, CBG5, CBG6, CBG7, each CBG contains 1 CB; during initial transmission, CBGTI field values in DCI1-1 are [11111111], new transmission data indicated by NDI and a current HARQ process number; the UE receives signals of a control channel and a shared channel, detects and decodes a transmission block, and the HARQ-ACK feedback of CB2, CB4, CB6, CB7 decoding errors or CB2 CRC, CB4 CRC, CB6 CRC, CB7 CRC detection errors, CBG2, CBG4, CBG6 and CBG7 is NACK; feeding back the expanded HARQ-ACK feedback information [10] to the base station based on the process; after the base station successfully receives the HARQ-ACK feedback information of the process, dividing all CBG blocks into 4 parts, wherein each part comprises 2 CBGs, performing LRC coding to obtain 4 local check blocks L ₀,L₁,L₂,L₃ and 2 global check blocks P ₁,P₂, and transmitting the local check blocks L ₁,L₂ and the global check blocks P ₁ to the UE; and the UE detects the check blocks, if the detection is correct, and detects correct CBG0, CBG2, CBG3 and CBG5 block information according to the last transmission to obtain CBG2, CBG4, CBG6 and CBG7 block information, and feeds back HARQ-ACK feedback information [00] information to the base station.

It can be appreciated that as the number of HARQ processes increases, the saved overhead is more significant.

For example, as shown in fig. 20, when the HARQ process is 8 and the cbg number is 8, the code number of the HARQ-ACK feedback information (referred to as HARQ-ACK CODEBOOK) is reduced from the original 64 bits to 16 bits.

For another example, as shown in fig. 21, when the HARQ process is 16 and the cbg number is 8, the code number of the HARQ-ACK feedback information is reduced from the original 128 bits to 32 bits.

For another example, as shown in fig. 22, when the HARQ process is 16 and the cbg number is 12, the code number of the HARQ-ACK feedback information is reduced from the original 192 bits to 32 bits.

For another example, as shown in fig. 23, when the HARQ is 16 and the cbg number is 16, the code number of the HARQ-ACK feedback information is reduced from the original 256 bits to 32 bits.

For another example, as shown in fig. 24, when the HARQ is 16 and the cbg number is 24, the code number of the HARQ-ACK feedback information is reduced from 384 bits to 32 bits.

For another example, as shown in fig. 25, when the HARQ is 16 and the cbg number is 32, the code number of the HARQ-ACK feedback information is reduced from the original 512 bits to 32 bits.

In some embodiments, the second node transmits second indication information to the first node; correspondingly, the first node receives second indication information sent by the second node. The second indication information is used for determining data to be transmitted by combining the HARQ-ACK feedback information.

In some embodiments, the second indication information has a fifth value, for indicating that in case the HARQ-ACK feedback information indicates that the TB transmission failed, the TB retransmission is expected to include a retransmission based on packet coding; the second indication information has a sixth value, and is used for retransmitting the TB when the HARQ-ACK feedback information indicates that the transmission of the TB fails.

In some embodiments, the second indication information has a seventh value, which is used to indicate that all CBGs in the TB are successfully transmitted; the value of the second indication information is an eighth value, and the number of CBGs used for indicating transmission failure is smaller than or equal to a first threshold value; the value of the second indication information is a ninth value, and the ninth value is used for indicating that the number of transmission failures is larger than a first threshold value and the ratio of the number of CBGs in the TB and the CBGs in the TB is smaller than or equal to a second threshold value; the value of the second indication information is a tenth value, and the ratio between the CBG indicating the transmission failure and the number of CBGs in the TB is greater than a second threshold.

For example, as shown in fig. 26, in the case where the higher layer parameter maxCodeBlockGroupsPerTransportBlock is equal to or greater than 4, the HARQ-ACK feedback at the CBG level is changed to the HARQ-ACK feedback at the TB level. The HARQ-ACK feedback information is a for indicating that the TB transmission is successful, and N for indicating that the TB transmission is failed. Wherein, if there is transmission failure or CBG with transmission failure in CBG corresponding to the TB, the TB fails to transmit.

And sending a second indication message to the sending end together with the TB-level HARQ-ACK feedback.

The second indication information is determined by one of the following ways:

Configured by higher layer signaling.

The size of the second indication information may be 1 bit, 2 bits, 3 bits, 4 bits, 5 bits, or 6 bits, which is predefined.

For example, when the second indication information is 1 bit, and 0 indicates that the TB transmission fails, it is desirable that the TB retransmission include a retransmission based on packet coding; 1 is used for retransmitting the TB in case the HARQ-ACK feedback information indicates a TB transmission failure.

For another example, when the second indication information is 2 bits, 00 is used to indicate that all CBGs in the TB are successfully transmitted; 11 is used for indicating that the number of CBGs failed in transmission is smaller than or equal to a first threshold value; 01 is used for indicating that the number of transmission failures is larger than a first threshold value and the ratio between the CBG of the transmission failures and the number of CBGs in the TB is smaller than or equal to a second threshold value; 10 is used to indicate that the ratio between CBG failed in transmission and the number of CBGs in the TB is greater than a second threshold.

Exemplary eleven, as shown in fig. 27, the maximum CBG number of the higher layer parameter configuration is 4, and the TB block transmitted by the current process has 8 CBs, which are divided into 4 CBGs, namely CBG0, CBG1, CBG2, CBG3, each CBG containing 2 CBs; during initial transmission, CBGTI field values in DCI1-1 are [1111], new transmission data indicated by NDI and current HARQ process numbers, a UE receives signals of a control channel and a shared channel, and detects and decodes a transmission block; CB2, CB5 decoding error or CB2 CRC, CB5 CRC detection error, HARQ-ACK feedback of CBG1 and CBG2 is NACK, and HARQ-ACK information [ N ] of TB level and sending DATA indication information (marked as DATA INDICATOR) to a base station are fed back based on the process; after the base station successfully receives the HARQ-ACK feedback information and the data indication information of the process TB level, performing RS coding operation on all CBG blocks (if the bit numbers are unequal, zero padding is aligned) to obtain a check block, obtaining a check block R ₁,R₂, and transmitting R ₁,R₂ to the UE; and the UE detects the two check blocks, if the detection is correct, and detects correct CBG0 and CBG3 block information according to the last transmission, and performs RS decoding together to obtain CBG1 and CBG2 block information, and feeds back HARQ-ACK feedback information [ A ] to the base station.

As shown in fig. 28, the maximum CBG number of the high-level parameter configuration is 8, and the TB block transmitted by the current process has 8 CBs and is divided into 4 CBGs, namely CBG0, CBG1, CBG2, CBG3, CBG4, CBG5, CBG6 and CBG7, and each CBG contains 1 CB; during initial transmission, CBGTI field values in DCI1-1 are [11111111], new transmission data indicated by NDI and current HARQ process numbers, a UE receives signals of a control channel and a shared channel, and detection decoding is carried out on a transmission block; CB2 decoding error or CB2 CRC detection error, the HARQ-ACK feedback of CBG1 is NACK, and based on the process, the HARQ-ACK feedback information [ N ] of TB level and the transmission data indication information are fed back to the base station; after the base station successfully receives the HARQ-ACK feedback information and the data indication information of the process TB level, performing RS coding operation on all CBG blocks (if the bit numbers are unequal, zero padding is aligned) to obtain a check block, obtaining a check block R ₁,R₂, and transmitting R ₁,R₂ to the UE; and the UE detects the two check blocks, if the detection is correct, detects correct CBG0, CBG2, CBG3, CBG4, CBG5, CBG6 and CBG7 block information according to the last transmission, performs RS decoding together to obtain CBG1 block information, and feeds back HARQ-ACK feedback information [ A ] to the base station.

Example thirteen, as shown in fig. 29. The maximum CBG number of the high-level parameter configuration is 8, the TB block transmitted by the current process has 8 CBs, and the TB block is divided into 4 CBGs, namely CBG0, CBG1, CBG2, CBG3, CBG4, CBG5, CBG6 and CBG7, and each CBG comprises 1 CB; during initial transmission, CBGTI field values in DCI1-1 are [11111111], new transmission data indicated by NDI and current HARQ process numbers, a UE receives signals of a control channel and a shared channel, and detection decoding is carried out on a transmission block; CB2, CB4 decoding error or CB2 CRC, CB4 CRC detection error, HARQ-ACK feedback of CBG2 and CBG4 is NACK, and HARQ-ACK feedback information [ N ] of TB level and sending data indication information to a base station are fed back based on the process; after the base station successfully receives the HARQ-ACK feedback information and the data indication information of the process TB level, performing RS coding operation on all CBG blocks (if the bit numbers are unequal, zero padding is aligned) to obtain check blocks, obtaining check blocks R ₁,R₂, and transmitting 2 check blocks R ₁,R₂ to the UE; and the UE detects the two check blocks, if the detection is correct, detects correct CBG0, CBG1, CBG3, CBG5, CBG6 and CBG7 block information according to the last transmission, performs RS decoding together to obtain CBG2 and CBG4 block information, and feeds back HARQ-ACK information [ A ] to the base station.

Example fourteen, as shown in fig. 30. The maximum CBG number of the high-level parameter configuration is 8, the TB block transmitted by the current process is provided with 8 CBs, and the CBs are divided into 4 CBGs, namely CBG0, CBG1, CBG2, CBG3, CBG4, CBG5, CBG6 and CBG7, each CBG comprises 1 CB, when in initial transmission, the CBGTI field value in DCI1-1 is [11111111], new transmission data indicated by NDI and the current HARQ process number; the UE receives signals of a control channel and a shared channel, detects and decodes a transmission block, and feeds back HARQ-ACK feedback information [ N ] of a TB level and sending data indication information to a base station based on the process, wherein the HARQ-ACK feedback information of the TB level is NACK, and the CB2, CB4 and CB6 decoding errors or CB2 CRC, CB4 CRC, CB6 CRC detection errors and CBG2, CBG4 and CBG 6; after the base station successfully receives the HARQ-ACK feedback information and the data indication information of the process TB level, performing RS coding operation on all CBG blocks (if the bit numbers are unequal, zero padding is aligned) to obtain a check block, obtaining a check block R ₁,R₂,R₃,R₄, and transmitting 4 check packets to the UE; and the UE detects the four check blocks, if the detection is correct, and detects correct CBG0, CBG1, CBG3, CBG5 and CBG7 block information according to the last transmission, and performs RS decoding together to obtain CBG2, CBG4 and CBG6 block information, and feeds back HARQ-ACK feedback information [ A ] to the base station.

It can be appreciated that as the number of HARQ processes increases, and the number of CBGs increases, the saved overhead is more significant.

For example, as shown in fig. 31, when HARQ is 8 and the cbg number is 4, the feedback overhead is reduced from the original 32 bits to 24 bits.

As another example, as shown in fig. 32, when the HARQ is 8 and the cbg number is 6, the feedback overhead is reduced from the original 48 bits to 24 bits.

As another example, as shown in fig. 33, when the HARQ is 8 and the cbg number is 8, the feedback overhead is reduced from the original 64 bits to 24 bits.

As another example, as shown in fig. 34, when HARQ is 8 and the cbg number is 16, the feedback overhead is reduced from the original 128 bits to 24 bits.

As another example, as shown in fig. 35, when the HARQ is 8 and the cbg number is 32, the feedback overhead is reduced from the original 256 bits to 24 bits.

Based on the above, under the conditions that the TB is large and the number of CBGs is large, the second node can know the data transmission type in advance, so that judgment can be made more quickly and retransmission is prepared, feedback overhead is reduced, and meanwhile, the reliability of data retransmission is improved.

The foregoing description of the embodiments of the present disclosure has been presented primarily in terms of methods. Also shown below is a data transmission device for performing the data transmission method in any of the embodiments and possible implementations thereof, and a data transmission device for performing the data transmission method in any of the embodiments and possible implementations thereof.

It is understood that, in order to implement the data transmission method, the data transmission device includes a hardware structure and/or a software module for executing each function; those of skill in the art will readily appreciate that the algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or a combination of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

The embodiment of the disclosure may divide the functional modules of the data transmission device according to the embodiment of the method, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one functional module. The integrated modules may be implemented in hardware or software. It should be noted that, in the embodiment of the present disclosure, the division of the modules is merely a logic function division, and other division manners may be implemented in actual practice. The following description will take an example of dividing each function module into corresponding functions.

Fig. 36 is a schematic diagram of a data transmission apparatus according to an embodiment of the present disclosure, which is applied to a first node. The data transmission apparatus 200 includes: a processing module 201 and a communication module 202.

A processing module 201, configured to generate first indication information indicating a data transmission type;

a communication module 202, configured to transmit first indication information indicating a data transmission type;

the communication module 202 is further configured to perform data transmission with the second node based on the first indication information.

In some embodiments, the communication module 202 is configured to transmit data to the second node based on the first indication information; or the communication module 202 is configured to receive the data transmitted by the second node based on the first indication information.

In some embodiments, the first indication information is transmitted in uplink scheduling information; or the first indication information is transmitted in the downlink scheduling information.

In some embodiments, the communication module 202 is configured to receive HARQ-ACK feedback information sent by the second node.

In some embodiments, HARQ-ACK feedback information is used to indicate whether each code block group CBG in a transport block TB was transmitted successfully.

In some embodiments, the communication module 202 is specifically configured to perform a packet encoding operation on at least one CBG including the CBG that fails to be transmitted, to obtain a retransmission packet; and sending the retransmission packet to the second node.

In some embodiments, performing a packet encoding operation on at least one CBG including a CBG that failed to transmit, resulting in a retransmission packet, including at least one of:

Performing packet coding operation on all CBGs in the TB to obtain retransmission packets;

performing packet coding operation on the first half CBG in the TB to obtain a retransmission packet;

performing packet coding operation on the latter half CBG in the TB to obtain a retransmission packet;

performing packet coding operation on the first half CBG in the TB to obtain a first retransmission packet, and performing packet coding operation on the second half CBG in the TB to obtain a second retransmission packet;

and selecting part of CBGs in the TB to carry out packet coding operation according to the intervals according to the CBG indexes to obtain retransmission packets, wherein the intervals are predefined values or are determined according to signaling and/or the number of CBGs included in the TB.

In some embodiments, the packet encoding operation includes at least one of: exclusive or operation, RS encoding operation, LRC encoding operation.

In some embodiments, the first indication information includes data retransmission type indication information and/or a CBG indication corresponding to the packet encoded data.

In some embodiments, the data retransmission type includes at least one of: a first retransmission type, a second retransmission type, a third retransmission type, a fourth retransmission type; the first retransmission type, the second retransmission type and the third retransmission type correspond to different packet coding retransmission, and the fourth retransmission type is retransmission without packet coding.

In some embodiments, the retransmission data of the first retransmission type comprises retransmission packets obtained via an exclusive or operation between data; the retransmission data of the second retransmission type comprises retransmission packets obtained by the data through RS coding operation; the retransmission data of the third retransmission type comprises retransmission packets obtained by the data through LRC coding operation; the retransmission data of the fourth retransmission type includes a retransmitted CBG or TB.

In some embodiments, the CBG indication corresponding to the packet encoded data is used to indicate that at least one of:

All CBGs in TB;

the first half CBG in TB;

the second half of CBG in TB;

The first half CBG in TB and the second half CBG in TB;

According to the index and interval of each CBG in the TB, a part of CBGs in the TB are selected.

Wherein the interval is a predefined value or the interval is determined according to the number of CBGs comprised by the signaling and/or the TB.

In some embodiments, HARQ-ACK feedback information is used to indicate CBG error conditions in the TBs.

In some embodiments, the HARQ-ACK feedback information has a first value, which is used to indicate that the TB transmission is successful;

the HARQ-ACK feedback information also includes one or more other values, each value representing at least one of:

For indicating a CBG transmission failure;

For indicating two CBG transmission failures;

The number of CBGs used for representing transmission failure is smaller than or equal to a first threshold value;

the number of CBGs used to indicate transmission failure is greater than a first threshold;

The ratio between the CBG used to represent transmission failure and the number of CBGs in the TB is less than or equal to a second threshold;

a ratio between the CBG used to indicate transmission failure and the number of CBGs in the TB is greater than a second threshold;

for representing a data retransmission type, the data retransmission type comprising a retransmission based on packet coding;

for indicating that there is a CBG error in the first half of CBGs in the TB;

For indicating CBG errors in the latter half of CBGs in the TB;

For indicating that CBGs in the TB have errors according to CBG indexes;

for indicating that no physical shared channel was received;

For indicating TB errors.

In some embodiments, the HARQ-ACK feedback information has a first value, which is used to indicate that the TB transmission is successful;

The value of the HARQ-ACK feedback information is a second value and is used for indicating that one CBG transmission fails;

The HARQ-ACK feedback information has a third value, which is used to indicate that two CBG transmissions failed.

In some embodiments, the HARQ-ACK feedback information has a first value, which is used to indicate that the TB transmission is successful;

The value of the HARQ-ACK feedback information is a second value, and the number of CBGs used for indicating transmission failure is smaller than or equal to a first threshold value;

The value of the HARQ-ACK feedback information is a third value, and the value is used for indicating that the number of transmission failures is larger than a first threshold value and the ratio between the CBG of the transmission failures and the number of CBGs in the TB is smaller than or equal to a second threshold value;

the HARQ-ACK feedback information has a fourth value, and is used to indicate that a ratio between the CBG with failed transmission and the number of CBGs in the TB is greater than a second threshold.

In some embodiments, the HARQ-ACK feedback information has a first value, which is used to indicate that the TB transmission is successful;

The value of the HARQ-ACK feedback information is a second value, which is used for indicating that the TB transmission fails and the packet coding retransmission is expected, or the number of CBGs used for indicating the transmission failure is smaller than or equal to a first threshold, or the number of CBGs used for indicating the transmission failure is 1;

The value of the HARQ-ACK feedback information is a third value and is used for indicating that the physical shared channel is not received;

The value of the HARQ-ACK feedback information is a fourth value, which is used to indicate that the TB transmission fails.

In some embodiments, the communication module 202 is configured to receive second indication information sent by the second node;

in some embodiments, the second indication information has a fifth value, for indicating that in case the HARQ-ACK feedback information indicates that the TB transmission failed, the TB retransmission is expected to include a retransmission based on packet coding; the second indication information has a sixth value, and is used for retransmitting the TB when the HARQ-ACK feedback information indicates that the transmission of the TB fails.

In some embodiments, the second indication information has a seventh value, which is used to indicate that all CBGs in the TB are successfully transmitted;

the value of the second indication information is an eighth value, and the number of CBGs used for indicating transmission failure is smaller than or equal to a first threshold value;

The value of the second indication information is a ninth value, and the ninth value is used for indicating that the number of transmission failures is larger than a first threshold value and the ratio of the number of CBGs in the TB and the CBGs in the TB is smaller than or equal to a second threshold value;

The value of the second indication information is a tenth value, and the ratio between the CBG indicating the transmission failure and the number of CBGs in the TB is greater than a second threshold.

Fig. 37 is a schematic diagram of a data transmission apparatus according to an embodiment of the present disclosure, which is applied to a second node. The data transmission apparatus 300 includes: a communication module 301 and a processing module 302.

The communication module 301 is configured to receive first indication information indicating a data transmission type.

The communication module 301 is further configured to perform data transmission with the first node based on the first indication information.

In some embodiments, the communication module 301 is configured to receive the first node transmission data based on the first indication information; or a communication module 301, configured to transmit data to the second node based on the first indication information.

The content related to the first indication information may refer to the description of the device at the second node, which is not described herein.

In some embodiments, the communication module 301 is further configured to send hybrid automatic repeat request HARQ-ACK feedback information.

The content related to the HARQ-ACK feedback information of the hybrid automatic repeat request may refer to the description of the device at the second node and will not be described herein.

In some embodiments, the communication module 301 is further configured to receive retransmission data sent by the first node when the data sent by the first node is retransmission data, where the retransmission data includes data obtained by packet encoding at least one CBG including CBGs that failed to be transmitted by the first node.

In some embodiments, the processing module 302 is configured to decode the retransmission data according to the first indication information, detect the correct CBG according to the last transmission and retransmit the data, and obtain the CBG with failed transmission.

The contents related to the retransmission data, the packet coding operation, and the HARQ-ACK feedback information may be referred to the description of the device at the second node and will not be repeated herein.

In some embodiments, the communication module 301 is further configured to send second indication information, where the second indication information is used to determine data to be transmitted in conjunction with the HARQ-ACK feedback information.

The second indication information related content may refer to a description of the device at the second node and will not be described herein.

In the case of implementing the functions of the integrated modules in the form of hardware, the embodiments of the present disclosure also provide a possible structure of a communication device for performing the data transmission method provided by the embodiments of the present disclosure. As shown in fig. 38, the communication apparatus 400 includes: a communication interface 403, a processor 402 and a bus 404. Optionally, the communication device may further comprise a memory 401.

The processor 402 may be any logic block, module, and circuitry that implements or performs various examples described in connection with embodiments of the disclosure. The processor 402 may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various exemplary logic blocks, modules and circuits described in connection with embodiments of the disclosure. Processor 402 may also be a combination that implements computing functionality, e.g., comprising one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

A communication interface 403 for connecting with other devices via a communication network. The communication network may be an ethernet, a radio access network, a wireless local area network (Wireless local area networks, WLAN), etc.

Memory 401, which may be, but is not limited to, read-only memory (ROM) or other type of static storage device that may store static information and instructions, random access memory (random access memory, RAM) or other type of dynamic storage device that may store information and instructions, or electrically erasable programmable Read-only memory (ELECTRICALLY ERASABLE PROGRAMMABLE READ-only memory, EEPROM), magnetic disk storage or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

As a possible implementation, the memory 401 may exist separately from the processor 402, and the memory 401 may be connected to the processor 402 by a bus 404, for storing instructions or program codes. The processor 402, when calling and executing instructions or program code stored in the memory 401, is capable of implementing the data transmission method provided by the embodiments of the present disclosure.

In another possible implementation, the memory 401 may also be integrated with the processor 402.

Bus 404, which may be an extended industry standard architecture (Extended industry standard architecture, EISA) bus, or the like. The bus 404 may be classified as an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in fig. 38, but not only one bus or one type of bus.

Some embodiments of the present disclosure provide a computer readable storage medium (e.g., a non-transitory computer readable storage medium) having stored therein computer program instructions that, when run on a computer, cause the computer to perform a data transmission method as described in any of the above embodiments.

In an exemplary embodiment, the computer may be the communication device described above, and the present disclosure is not limited to a specific form of the computer.

In some examples, the computer-readable storage medium described above may include, but is not limited to: magnetic storage devices (e.g., hard disk, floppy disk or tape, etc.), optical disks (e.g., compact Disk (CD), digital versatile disk (DIGITAL VERSATILEDISK, DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (Erasable programmable read-nly memory, EPROM), card, stick, key drive, etc.). Various computer-readable storage media described in this disclosure may represent one or more devices and/or other machine-readable storage media for storing information. The term "machine-readable storage medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

The disclosed embodiments provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the data transmission method according to any of the above embodiments.

The foregoing is merely a specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, and any changes or substitutions within the technical scope of the disclosure should be covered by the protection scope of the disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims (33)

1. A method of data transmission, for use with a first node, the method comprising:

transmitting first indication information indicating a data transmission type;

And carrying out data transmission with the second node based on the first indication information.

2. The method of claim 1, wherein the transmitting data with the second node based on the first indication information comprises:

transmitting data to the second node based on the first indication information; or alternatively

And receiving the data transmitted by the second node based on the first indication information.

3. The method of claim 1, wherein transmitting the first indication information indicating the data transmission type comprises:

the first indication information is transmitted in uplink scheduling information; or alternatively

And the first indication information is transmitted in the downlink scheduling information.

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

And the first node receives the HARQ-ACK feedback information sent by the second node.

5. The method of claim 4 wherein the HARQ-ACK feedback information is used to indicate whether each code block group CBG in a transport block TB was transmitted successfully.

6. The method according to claim 1 or 2, wherein the data transmission with the second node based on the first indication information comprises:

performing packet coding operation on at least one CBG including CBG with transmission failure to obtain retransmission packets;

and sending the retransmission packet to the second node.

7. The method of claim 6, wherein performing a packet encoding operation on at least one CBG including a CBG that failed to transmit to obtain a retransmission packet comprises at least one of:

performing packet coding operation on all CBGs in the TB to obtain the retransmission packet;

Performing packet coding operation on the first half CBG in the TB to obtain the retransmission packet;

performing packet coding operation on the second half CBG in the TB to obtain the retransmission packet;

Performing packet coding operation on the first half CBG in the TB to obtain a first retransmission packet, and performing packet coding operation on the second half CBG in the TB to obtain a second retransmission packet;

And selecting part of CBGs in the TB to carry out packet coding operation according to indexes of each CBG in the TB and intervals, so as to obtain the retransmission packet, wherein the intervals are used for representing absolute values of differences between indexes of two adjacent CBGs in the selected part of CBGs.

8. The method according to claim 6 or 7, wherein the packet encoding operation comprises at least one of: exclusive or operation, RS encoding operation, LRC encoding operation.

9. A method according to any one of claims 1 to 3, wherein the first indication information comprises data retransmission type indication information and/or a CBG indication corresponding to packet encoded data.

10. The method of claim 9, wherein the data retransmission type comprises at least one of: a first retransmission type, a second retransmission type, a third retransmission type, a fourth retransmission type; the first retransmission type, the second retransmission type and the third retransmission type correspond to different packet coding retransmission, and the fourth retransmission type is retransmission without packet coding.

11. The method of claim 10, wherein the step of determining the position of the first electrode is performed,

The retransmission data of the first retransmission type comprises retransmission packets obtained through an exclusive OR operation between data; the retransmission data of the second retransmission type comprises retransmission packets obtained by the data through RS coding operation; the retransmission data of the third retransmission type comprises retransmission packets obtained by data through LRC coding operation; the retransmission data of the fourth retransmission type includes a retransmitted CBG or TB.

12. The method of claim 9, wherein the CBG indication corresponding to the packet encoded data is used to indicate at least one of:

All CBGs in the TB;

The first half CBG in the TB;

The second half of the CBG in the TB;

a first half CBG in the TB and a second half CBG in the TB;

And selecting part of CBGs in the TB according to the indexes and the intervals of the CBGs in the TB.

13. The method of claim 4 wherein the HARQ-ACK feedback information is used to indicate CBG error conditions in a TB.

14. The method according to claim 4,5 or 13, wherein,

The value of the HARQ-ACK feedback information is a first value and is used for indicating that the TB transmission is successful;

the HARQ-ACK feedback information also includes one or more other values, each value representing at least one of:

For indicating a CBG transmission failure;

For indicating two CBG transmission failures;

The number of CBGs used for representing transmission failure is smaller than or equal to a first threshold value;

the number of CBGs used to indicate transmission failure is greater than a first threshold;

a ratio between CBG used to indicate the transmission failure and the number of CBGs in the TB is less than or equal to a second threshold;

A ratio between CBG used to indicate the transmission failure and the number of CBGs in the TB is greater than a second threshold;

for representing a data retransmission type, the data retransmission type comprising a retransmission based on packet coding;

for indicating that there is a CBG error in the first half of CBGs in the TB;

For indicating CBG errors in the latter half of CBGs in the TB;

for indicating that CBGs spaced in the TB have errors according to CBG indexes;

for indicating that no physical shared channel was received;

For indicating TB errors.

15. The method according to claim 4,5 or 13, wherein,

The value of the HARQ-ACK feedback information is a first value and is used for indicating that the TB transmission is successful;

The value of the HARQ-ACK feedback information is a second value and is used for indicating that one CBG transmission fails;

and the value of the HARQ-ACK feedback information is a third value and is used for indicating that two CBG transmission fails.

16. The method according to claim 4,5 or 13, wherein,

The value of the HARQ-ACK feedback information is a first value and is used for indicating that the TB transmission is successful;

the value of the HARQ-ACK feedback information is a second value, and the number of CBGs used for indicating transmission failure is smaller than or equal to a first threshold value;

The value of the HARQ-ACK feedback information is a third value and is used for indicating that the number of transmission failures is larger than a first threshold value and the ratio between the CBG of the transmission failures and the number of CBGs in the TB is smaller than or equal to a second threshold value;

and the value of the HARQ-ACK feedback information is a fourth value, and the ratio of the CBG with failed transmission to the number of CBGs in the TB is larger than a second threshold.

17. The method according to claim 4,5 or 13, wherein,

The value of the HARQ-ACK feedback information is a first value and is used for indicating that the TB transmission is successful;

The value of the HARQ-ACK feedback information is a second value, which is used for indicating that the TB transmission fails and the packet coding retransmission is expected, or the number of CBGs used for indicating the transmission failure is smaller than or equal to a first threshold, or the number of CBGs used for indicating the transmission failure is 1;

The value of the HARQ-ACK feedback information is a third value and is used for indicating that a physical shared channel is not received;

and the value of the HARQ-ACK feedback information is a fourth value and is used for indicating the TB transmission failure.

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

And receiving second indication information sent by the second node, wherein the second indication information is used for determining data to be transmitted in combination with the HARQ-ACK feedback information.

19. The method of claim 18, wherein the step of providing the first information comprises,

The value of the second indication information is a fifth value, which is used for indicating that the TB retransmission is expected to comprise retransmission based on packet coding when the HARQ-ACK feedback information indicates that the TB transmission fails;

And the value of the second indication information is a sixth value, which is used for retransmitting the TB when the HARQ-ACK feedback information indicates that the TB transmission fails.

20. The method of claim 18, wherein the step of providing the first information comprises,

The value of the second indication information is a seventh value, and is used for indicating that all CBGs in the TB are successfully transmitted;

the value of the second indication information is an eighth value, and the number of CBGs used for indicating transmission failure is smaller than or equal to a first threshold value;

The value of the second indication information is a ninth value, and is used for indicating that the number of transmission failures is larger than a first threshold value and the ratio between the CBG of the transmission failures and the number of CBGs in the TB is smaller than or equal to a second threshold value;

The value of the second indication information is a tenth value, and the ratio between the CBG that is used for indicating the transmission failure and the number of CBGs in the TB is greater than a second threshold.

21. A method of data transmission, for use with a second node, the method comprising:

Receiving first indication information indicating a data transmission type;

and carrying out data transmission with the first node based on the first indication information.

22. The method of claim 21, wherein transmitting data with the first node based on the first indication information specifically comprises:

Receiving the first node transmission data based on the first indication information; or alternatively

And transmitting data to the second node based on the first indication information.

23. The method according to claim 21, wherein transmitting first indication information indicating a data transmission type specifically comprises:

The first indication information is transmitted in uplink scheduling information, or,

And the first indication information is transmitted in the downlink scheduling information.

24. The method of claim 21, wherein the method further comprises:

The second node transmits hybrid automatic repeat request, HARQ-ACK, feedback information to the first node.

25. The method of claim 24 wherein the HARQ-ACK feedback information is used to indicate whether each code block group CBG in a transport block TB was transmitted successfully.

26. The method of claim 21, wherein the transmitting data with the first node based on the first indication information comprises:

and when the data sent by the first node is retransmission data, receiving the retransmission data sent by the first node, wherein the retransmission data comprises data obtained by carrying out packet coding on at least one CBG (CBG) including CBG with transmission failure by the first node.

27. The method of claim 26, wherein the method further comprises:

And decoding the retransmission data according to the first indication information, and detecting correct CBG and the retransmission data according to the last transmission to obtain the CBG with failed transmission.

28. The method of claim 26, wherein the retransmission data comprises data obtained by the first node packet encoding at least one CBG including CBGs that failed to be transmitted, and wherein the retransmission data comprises at least one of:

performing packet coding operation on all CBGs in the TB to obtain the retransmission packet;

Performing packet coding operation on the first half CBG in the TB to obtain the retransmission packet;

performing packet coding operation on the second half CBG in the TB to obtain the retransmission packet;

Performing packet coding operation on the first half CBG in the TB to obtain a first retransmission packet, and performing packet coding operation on the second half CBG in the TB to obtain a second retransmission packet;

And selecting part of CBGs in the TB to carry out packet coding operation according to indexes of each CBG in the TB and intervals, so as to obtain the retransmission packet, wherein the intervals are used for representing absolute values of differences between indexes of two adjacent CBGs in the selected part of CBGs.

29. The method of claim 26 or 28, wherein the packet encoding operation comprises at least one of: exclusive or operation, RS encoding operation, LRC encoding operation.

30. The method according to any of claims 21 to 23, wherein the first indication information comprises data retransmission type indication information and/or a CBG indication corresponding to packet encoded data.

31. The method according to any one of claims 21 to 24, further comprising:

and sending second indication information, wherein the second indication information is used for determining data to be transmitted in combination with the HARQ-ACK feedback information.

32. A communication device, comprising: a memory and a processor; the memory is coupled to the processor; the memory is used for storing instructions executable by the processor; the processor, when executing the instructions, performs the method of any one of claims 1 to 31.

33. A computer readable storage medium having stored thereon computer instructions which, when run on a communication device, cause the communication device to perform the method of any of claims 1 to 31.