CN109565368B

CN109565368B - Data transmission method and communication device

Info

Publication number: CN109565368B
Application number: CN201680088061.5A
Authority: CN
Inventors: 张长; 周国华
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-08-09
Filing date: 2016-08-09
Publication date: 2020-11-27
Anticipated expiration: 2036-08-09
Also published as: WO2018027588A1; CN109565368A

Abstract

The embodiment of the invention provides a data transmission method and a data transmission device, wherein initial transmission data of first data is sent through a first process on m continuous minimum scheduling time units, and retransmission data of the first data is determined according to a Redundancy Version (RV) and retransmission resources; and sending the determined retransmission data of the first data through the first process so as to realize the relative balance among the transmission rate, the transmission delay and the transmission reliability.

Description

Data transmission method and communication device

Technical Field

The invention relates to the technical field of wireless communication, in particular to a data transmission method and a data transmission device.

Background

Uplink data and downlink data in a Long Term Evolution (LTE) system are respectively carried by a Physical Uplink Shared Channel (PUSCH) and a Physical Downlink Shared Channel (PDSCH). In order to ensure the reliability and transmission efficiency of data transmission, the LTE system adopts the following two key technologies: adaptive Modulation and Coding (AMC) and hybrid automatic repeat request (HARQ).

AMC is a process of determining a Modulation and Coding Scheme (MCS) for data transmission according to Channel State Information (CSI), which is estimated according to Reference Signals (RS) measurement. For uplink communication, a base station firstly measures and estimates according to an RS (radio signal) sent by User Equipment (UE) to obtain uplink CSI (channel state information), then determines an MCS (modulation and coding scheme) of uplink data communication according to the CSI, and finally informs the UE through a downlink control channel; for downlink communication, the base station firstly sends the RS to the UE, the UE utilizes the RS to measure and estimate to obtain downlink CSI and reports the downlink CSI to the base station, and finally the base station determines the MCS of downlink data communication according to the obtained CSI. The PUSCH and PDSCH of current LTE systems generally affect the selection of MCS by controlling the initial block error rate (IBLER) target value (e.g., 10%).

For reliable transmission of data, the LTE system introduces HARQ technology on the basis of AMC. HARQ is a technology combining Forward Error Correction (FEC) coding and automatic repeat request (ARQ), in which a second communication apparatus can correct a part of error data by using the FEC technology, and for an uncorrectable error packet, the second communication apparatus requests the first communication apparatus to retransmit data of an original Transport Block (TB). In order to enable continuous data transmission between a first communication device and a second communication device using HARQ technology, a multiple HARQ process mechanism may be introduced, and when data of one HARQ process waits for feedback from a receiving end, data transmission may be continued through other HARQ processes.

The performance requirements of the service include three dimensions of transmission rate, transmission delay and transmission reliability. The existing broadband system is designed more by considering how to improve the transmission rate and the transmission reliability, for example, HARQ is a technology for effectively improving the transmission rate on the premise of ensuring the transmission reliability, but the introduction of HARQ sacrifices the transmission delay to a certain extent. For services with higher transmission rate requirements, transmission delay requirements and transmission reliability requirements, such as real-time video services, the existing HARQ mechanism cannot simultaneously meet the requirements of the three aspects.

Disclosure of Invention

The embodiment of the invention provides a data transmission method and a communication device, which aim to realize the relative balance among transmission rate, transmission delay and transmission reliability.

The embodiment of the invention can be realized by the following technical scheme:

in a first aspect, a data transmission method is provided, where the method includes: sending initial transmission data of first data through a first process on m continuous minimum scheduling time units, wherein m is a positive integer; receiving negative acknowledgement information (NACK) of the first data and a retransmission resource indication, wherein the retransmission resource indication comprises information indicating n, n is used for determining the number of minimum scheduling time units required for transmitting retransmission data of the first data, and n is a positive integer; determining retransmission data of the first data according to Redundancy Version (RV) and n; transmitting, by the first process, the determined retransmission data of the first data.

According to the data transmission method, the rate of data transmission by adopting the HARQ transmission mechanism is improved by retransmitting according to the requirement, so that the relative balance among the transmission rate, the transmission delay and the transmission reliability can be realized.

The data transmission method is suitable for downlink data transmission, uplink data transmission, or device-to-device, D2D). For example, in downlink data transmission, the method may be performed by a base station; the method may be performed by a terminal in an uplink data transmission or a D2D data transmission.

In one possible design, sending the retransmission data of the first data by the first process is implemented by: and transmitting retransmission data of the first data according to the n minimum scheduling time units.

In one possible design, retransmission data of the first data is sent by the first process over n consecutive minimum scheduled time units; and transmitting second data through a second process on m-n consecutive minimum scheduling time units in the set of m consecutive minimum scheduling time units for transmitting retransmission data of the first data, wherein the second process is a neighboring process of the first process, and n < m.

In one possible design, the retransmission data of the first data is mapped to n minimum scheduling time units according to the time sequence of the first process, wherein the n minimum scheduling time units are distributed in G₁Group of m consecutive maximaIn a small scheduling time unit, ceil is rounding-up operation; and at G₁m-L in group of m consecutive minimum scheduling time units₁Sending second data through a second process on continuous minimum scheduling time units, wherein the second process is an adjacent process of the first process, L₁N mod m, mod being the modulo operation, n > m.

In one possible design, information indicating at least one of n and RV may be transmitted so that a receiving end may know the information of n and/or RV, and thus robustness of the system may be increased.

In one possible design, after receiving the retransmission resource indication, n may be further transformed into k, and then k is used to determine the retransmission data of the first data.

In one possible design, retransmission data of first data is transmitted by a first process over k consecutive minimum scheduled time units, and second data is transmitted by a second process over m-k consecutive minimum scheduled time units of the set of m consecutive minimum scheduled time units in which retransmission data of the first data is transmitted, wherein the second process is a neighboring process of the first process, k < m.

In one possible design, the retransmission data of the first data is mapped to k minimum scheduling time units according to the time sequence of the first process, wherein the k minimum scheduling time units are distributed in G₂On m continuous minimum scheduling time units of ceil (k/m) group, ceil is rounding-up operation; and at G₂m-L in group of m consecutive minimum scheduling time units₂Sending second data through a second process on continuous minimum scheduling time units, wherein the second process is an adjacent process of the first process, L₂K mod m, mod being the modulo operation, k > m.

In one possible design, information indicating k may be sent so that the receiving end may know the information of k, thereby increasing the robustness of the system.

The above design schemes can be applied to the data transmission scene using the synchronous HARQ mechanism, and the retransmission resources saved in one process are shared to the primary transmission data or the retransmission data of other processes through the design of the HARQ process and the related time sequence, so that the time domain resources can be fully utilized to transmit useful data, the achievable rate can be improved, and the conflict of feedback and retransmission among different packets can be avoided.

In one possible design, for the asynchronous HARQ, information indicating the process number of the first process may be sent while sending the initial transmission data of the first data or sending the retransmission data of the first data, or before sending the initial transmission data of the first data or sending the retransmission data of the first data, so that the receiving end may know the process information, and the robustness of the system is increased.

In one possible design, at least one of m and RV may also be sent to the receiving end.

In one possible design, m is variable in order to boost coding gain in narrowband scenarios.

In one possible design, information such as m, n, k, RV, and process number may be conveyed via control information.

In one possible design, for synchronous HARQ, it may be determined to which process the retransmission resource saved by the first process is used according to a predetermined rule, where the predetermined rule may be, for example: preferentially sharing the retransmission resources saved by the first process to the HARQ process with newly transmitted data and preferentially sharing the retransmission resources saved by the first process to the prior process; optionally, if the processes adjacent to the first process are all retransmission data, the retransmission data is used for the processes requiring more resources according to the retransmission needs of the adjacent processes, and if the adjacent processes do not require the retransmission resources remaining in the first process, the retransmission data is used for the retransmission of the first process itself.

In one possible design, to ensure the continuity in time sequence, when the second process is a previous process of the first process, the remaining retransmission resources of the first process may be arranged in front of the m consecutive minimum scheduling time units in which the remaining retransmission resources are located, and when the second process is a subsequent process of the first process, the remaining retransmission resources of the first process may be arranged behind the m consecutive minimum scheduling time units in which the remaining retransmission resources are located.

In a possible design, when the second process uses the retransmission resource saved by the first process for data transmission, the second process may further notify the second communication device of the resource information used by the second process, so that the system may be more robust.

Corresponding to the data transmission method of the first aspect, a second aspect further provides a data transmission method, including: receiving initial transmission data of first data, wherein the initial transmission data of the first data is data sent by a first process on m continuous minimum scheduling time units, and m is a positive integer; transmitting NACK and retransmission resource indication of the first data, wherein the retransmission resource indication comprises information indicating n, and n is used for determining the number of minimum scheduling time units required for transmitting the retransmission data of the first data; receiving retransmission data of the first data, wherein the retransmission data of the first data is sent by the first process and is determined according to a redundancy version and n.

The data transmission method is suitable for downlink data transmission, uplink data transmission, or device-to-device, D2D). For example, in uplink data transmission, the method may be performed by a base station; the method may be performed by the terminal in a downlink data transmission or a D2D data transmission.

In one possible design, the indication information of n may be, for example, an index value used for representing n, or may be the n value itself.

In one possible design, NACK feedback is performed through the existing ACK/NACK signal format, and retransmission resource indication is carried through control information, such as downlink control information or uplink control information; or, the extension may be performed on the basis of the existing ACK/NACK signal format, so that the existing ACK/NACK signal may carry the retransmission resource indication.

In one possible design, n may be determined based on characteristics of the received signal.

In one possible design, retransmission data of first data transmitted by a first process is received over n consecutive minimum scheduling time units; and receiving second data transmitted by a second process on m-n consecutive minimum scheduling time units in the set of m consecutive minimum scheduling time units for transmitting retransmission data of the first data, wherein the second process is a neighboring process of the first process, and n < m.

In one possible design, the receiving of the retransmission data of the first data is implemented by: receiving retransmission data of the first data, wherein the retransmission data of the first data is mapped onto n minimum scheduling time units according to the time sequence of the first process, wherein the n minimum scheduling time units are distributed on m consecutive minimum scheduling time units of a G1 (ceil (n/m) group, and ceil is an rounding-up operation; and receiving second data sent by a second process, wherein the second data is in m-L1 consecutive minimum scheduling time units in a G1-th group of m consecutive minimum scheduling time units, the second process is a neighboring process of the first process, L1 is n mod m, mod is a modulo operation, and n > m.

In one possible design, information indicative of at least one of n and RV is received.

In one possible design, retransmission data of the first data transmitted by the first process is received over k consecutive minimum scheduling time units; and receiving second data transmitted by a second process on m-k continuous minimum scheduling time units in the group of m continuous minimum scheduling time units for transmitting retransmission data of the first data, wherein the second process is a process adjacent to the first process, k is less than m, and k is obtained based on n transformation.

In one possible design, the receiving of the retransmission data of the first data is implemented by: receiving retransmission data of the first data, wherein the retransmission data of the first data is mapped onto k minimum scheduling time units according to the time sequence of the first process, wherein the n minimum scheduling time units are distributed on m consecutive minimum scheduling time units of a G2-ceil (k/m) group, wherein ceil is an rounding-up operation; and receiving second data sent by a second process, wherein the second data is in m-L2 continuous minimum scheduling time units in a G2 group of m continuous minimum scheduling time units, the second process is a neighboring process of the first process, L2 is k mod m, mod is a modulus operation, k is more than m, and k is obtained based on n transformation.

In one possible design, information indicating k may also be received.

In the above design scheme, by designing the HARQ process and the related timing sequence, the saved retransmission resources in one process are shared with the initial transmission data or the retransmission data of other processes, so that the time domain resources can be fully utilized to transmit useful data, the achievable rate is improved, and the collision of feedback and retransmission among different packets is avoided.

In one possible design, for the asynchronous HARQ, while receiving the initial transmission data of the first data or receiving the retransmission data of the first data, or before receiving the initial transmission data of the first data or receiving the retransmission data of the first data, the information indicating the process number of the first process may be received, so that the receiving end may know the process information, and the robustness of the system is increased.

In a third aspect, an embodiment of the present invention provides a communication apparatus with functionality for implementing the method in the first aspect. The above functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. For example, the communication device may include a processor and a transceiver in its structure.

In a fourth aspect, an embodiment of the present invention further provides a communication apparatus having a function in implementing the method in the second aspect. The above functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. For example, the communication device may include a receiver and a transmitter in its structure.

In a further aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for use in the communication apparatus according to the third aspect, which includes a program designed to execute the above aspects.

In a further aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for the communication apparatus of the fourth aspect, which includes a program designed to execute the above aspects.

Drawings

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

fig. 2 is a schematic flowchart of data transmission by using a HARQ transmission mechanism according to an embodiment of the present invention;

fig. 3 is a schematic flow chart of a data transmission method according to an embodiment of the present invention;

fig. 4 is a schematic timing diagram of an HARQ process according to an embodiment of the present invention;

fig. 5 is a schematic timing diagram of an HARQ process according to an embodiment of the present invention;

fig. 6 is a timing diagram of an HARQ process according to an embodiment of the present invention;

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

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

fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a base station according to an embodiment of the present invention;

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

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a schematic diagram of a wireless communication system to which the technical solution of the embodiment of the present invention can be applied.

In the solution of this embodiment, as in the communication system described in fig. 1, the communication system at least includes at least one base station and a plurality of terminals.

The communication system may be applicable to Long Term Evolution (LTE) and future-oriented communication technologies, and as long as the communication system faces similar problems as those mentioned in the background of the present application, the technical solution provided by the embodiments of the present invention is applicable. The system architecture and the service scenario described in the embodiment of the present invention are for more clearly illustrating the technical solution of the embodiment of the present invention, and do not limit the technical solution provided by the embodiment of the present invention. Specifically, the communication system in the embodiment of the present invention may be, for example, LTE or 5G.

The base station mentioned in the embodiment of the present invention is a device deployed in a radio access network to provide a terminal with a wireless communication function. The base stations may include various forms of macro base stations, micro base stations (also referred to as small stations), relay stations, access points, and the like. In systems using different radio access technologies, the names of devices with base station functionality may differ, for example, in LTE systems, called evolved node bs (enbs or enodebs). For convenience of description, in all embodiments of the present invention, the above-mentioned apparatuses providing a wireless communication function for a terminal are collectively referred to as a base station.

Terminals contemplated by embodiments of the present invention may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem with wireless communication capabilities. The terminal may also be referred to as a Mobile Station (MS), a user equipment (user equipment), a terminal equipment (terminal equipment), and may further include a subscriber unit (subscriber unit), a cellular phone (cellular phone), a smart phone (smart phone), a wireless data card, a Personal Digital Assistant (PDA) computer, a tablet computer, a wireless modem (modem), a handheld device (hand), a laptop computer (laptop computer), a cordless phone (cordless phone), or a Wireless Local Loop (WLL) station, a Machine Type Communication (MTC) terminal, and the like. For convenience of description, in all embodiments of the present invention, the above-mentioned devices are collectively referred to as a terminal.

It should be noted that the number and types of terminals included in the communication system shown in fig. 1 are merely exemplary, and the embodiments of the present invention are not limited thereto.

In the communication system described in fig. 1, a flow of data transmission using an HARQ transmission mechanism is shown in fig. 2, where an information bit sequence is channel coded to generate a coded bit sequence, and the coded bit sequence is stored in an HARQ buffer; during initial transmission or retransmission, according to a Redundancy Version (RV), taking out the row rate matching of the coded bit sequence from the HARQ cache to obtain a physical channel bit sequence; modulating the physical channel bit sequence to generate a physical channel symbol sequence; and carrying out resource mapping on the physical channel symbol sequence, and mapping the physical channel symbol sequence to a corresponding time frequency resource for transmission.

Specifically, an embodiment of the present invention provides a data transmission method, which may be applied to a scenario in which a HARQ transmission mechanism is used for data transmission, and as shown in fig. 3, the method may include:

s301, the first communication device sends the initial transmission data of the first data through the first process on m continuous minimum scheduling time units.

Here, the minimum scheduling time unit may be understood as a minimum unit for performing scheduling in a time domain, and may be, for example, a Transmission Time Interval (TTI). First of allIn the embodiment of the present invention, the initial transmission data of the first data is sent through m consecutive minimum scheduling time units, where m is a positive integer, and may be 4, for example. m may be a preset value, and the specific value of m is not limited in the embodiment of the present invention. In the HARQ process timing diagram shown in fig. 4 or fig. 5 or fig. 6, the HARQ processes are numbered 0-2, the minimum scheduling time unit is numbered from 1, the data transmission is indicated on the shaded minimum scheduling time unit,

the data of the initial transmission is shown,

the retransmission data is represented, and the first process is taken as HARQ process 0 as an example, and the initial transmission data of the first data is located on the minimum scheduling time unit with the number of 1-4. Fig. 4 or fig. 5 may be regarded as data transmission to which a synchronous HARQ mechanism is applied (hereinafter, referred to as synchronous HARQ), and fig. 6 may be regarded as data transmission to which an asynchronous HARQ mechanism is applied (hereinafter, referred to as asynchronous HARQ). It can be understood that, in the synchronous HARQ mechanism, the timing relationship between the HARQ processes is fixed, the first communication device or the second communication device can know the currently used HARQ process according to the current time, and in the asynchronous HARQ mechanism, the timing relationship between the HARQ processes is not fixed.

It can be understood that the initial transmission data of the first data may be controlled by the RV, and the initial transmission data of the first data is obtained from the HARQ buffer of the first process according to the RV to perform rate matching, so as to obtain a physical channel bit sequence, the physical channel bit sequence is modulated into a physical channel symbol sequence, and then the physical channel symbol sequence is mapped to the time-frequency resources corresponding to the m minimum scheduling time units to be sent.

S302, the second communication device receives and decodes the initial transmission data of the first data, and sends NACK and retransmission resource indication.

Specifically, the second communication device decodes the first data after receiving the first data, generates positive acknowledgement information ACK if the decoding is successful, and generates negative acknowledgement information NACK if the decoding is failed. The above ACK or NACK is collectively referred to as reception acknowledgement information. The embodiment of the invention mainly solves the problem of how to retransmit under the condition of decoding failure, so that the NACK is fed back to the first communication device after the second communication device decodes the NACK.

In addition, the second communication apparatus may further feed back a retransmission resource indication, where the retransmission resource indication includes indication information of n, where n is used to determine the number of minimum scheduling time units required for transmitting the retransmission data of the first data, where n may be any integer greater than 0, for example, n may be equal to m, may be smaller than m, or may be greater than m. The indication information of n may be in various forms, and may be, for example, an index value indicating n, or may be an n value itself, as long as the first communication apparatus can know n.

It can be understood that NACK and retransmission resource indication may be sent through one message or through different messages, for example, NACK feedback is performed through the existing ACK/NACK signal format, and retransmission resource indication is carried through control information, for example, downlink control information or uplink control information; or, the extension may be performed on the basis of the existing ACK/NACK signal format, so that the existing ACK/NACK signal may carry the retransmission resource indication. The embodiment of the present invention does not limit what message is used to send the reception acknowledgement information and the retransmission resource indication.

It will be appreciated that in subsequent procedures, the second communication device may also feed back a NACK and retransmission resource indication for the retransmitted data in the same manner. The NACK fed back after the second communication device receives the first data and decodes the first data, and the NACK fed back after the second communication device receives the retransmission data of the first data and decodes the retransmission data may be collectively referred to as the NACK of the first data, and the retransmission resource indication fed back after the second communication device receives the first data and decodes the retransmission resource indication fed back after the second communication device receives the retransmission data of the first data may be collectively referred to as the retransmission resource indication of the first data.

It is to be understood that n may be determined by the second communication apparatus according to different factors or requirements, for example, n may be determined according to characteristics of the received signal, and the characteristics of the received signal may include a Log Likelihood Ratio (LLR) distribution of an output of a decoder, or a difference between a CQI at the time of scheduling and a CQI of a received actual channel, and the like, which is not limited in the embodiments of the present invention.

S303, the first communication device determines retransmission data of the first data according to RV and n.

The first communication device retransmits the first data when receiving the NACK transmitted by the second communication device. And the retransmission data may be determined based on at least the RV and n. It is to be understood that the first communication device may directly use n to determine the retransmission data of the first data, or may obtain k based on n transformation, and finally determine the retransmission data of the first data by using k.

Specifically, the first communication device may switch from n to k based on different factors, for example, k may be obtained from n according to at least one of the available resources of the cell, the number of user equipments participating in scheduling in the cell, the historical primary retransmission correct rate, and the first data service type, where the historical primary retransmission correct rate may be a rate of successful primary retransmission in a previous period of time. For example, if the available resources in the cell are rich, more time resources than indicated by n may be configured for retransmission, that is, an offset may be added to n to obtain k, so as to improve the reliability of data transmission, or if the historical retransmission accuracy is low, more time resources than indicated by n may be configured for retransmission.

The first communication device determines retransmission data of the first data according to the RV and n (or k), for example, as follows: and taking the RV and n (or k) as the input of rate matching, generating the actually retransmitted data symbol and mapping the actually retransmitted data symbol to retransmission resources for transmission. It is understood that, in some cases, in addition to RV and n (or k), other reference factors are used as input of rate matching, which is not limited in the embodiment of the present invention.

S304, the first communication device transmits retransmission data of the first data through the first process.

After determining the retransmission data of the first data in S303, the first communication device transmits the retransmission data of the first data to the second communication device through the first process.

Optionally, for the synchronous HARQ shown in fig. 4 or fig. 5, depending on whether n is changed in S303, the manner of the first communication device sending the retransmission data of the first data through the first process is different:

first, when the first communication device does not convert n

The first communication device transmits retransmission data of the first data according to the n minimum scheduling time units. Specifically, when n is equal to m, the first communication device transmits retransmission data of the first data through the first process over n consecutive minimum scheduling time units; when n < m, the first communication device transmits retransmission data of the first data through the first process over n consecutive minimum scheduling time units, and transmits second data through the second process over m-n consecutive minimum scheduling time units in the set of m consecutive minimum scheduling time units for transmitting retransmission data of the first data; or when n is larger than m, mapping the retransmission data of the first data to n minimum scheduling time units according to the time sequence of the first process, wherein the n minimum scheduling time units are distributed in G₁Ceil is a rounding-up operation on a set of m consecutive minimum scheduling time units, ceil is a rounding-up operation, and on the G-th₁m-L in group of m consecutive minimum scheduling time units₁Transmitting second data through a second process on consecutive minimum scheduling time units, wherein L₁N mod m, mod being a modulo operation; alternatively, when n > m, the first communication apparatus transmits the retransmission data of the first data through the first process over m consecutive minimum scheduling time units, in which case the retransmission of the first data is terminated early. M-n or m-L as mentioned above₁The consecutive minimum scheduled time units can be regarded as the remaining retransmission resources of the first process.

Wherein the second process is an adjacent process of the first process. By adjacent processes is meant chronologically adjacent, toFig. 4 is an example, there are three HARQ processes, and assuming that the first process is HARQ process 0, the adjacent process of HARQ process 0 may be HARQ process 1 or HARQ process 2, and assuming that the first process is HARQ process 1, the adjacent process of HARQ process 1 may be HARQ process 0 or HARQ process 2. G th₁m-L in group of m consecutive minimum scheduling time units₁The consecutive minimum scheduling time units may be used for initial transmission of the second data as well as for retransmission of the second data.

Taking fig. 4 as an example, assuming that the first process is HARQ process 0, m is 4, and n is 2, the remaining 2 minimum scheduling time units in the set of 4 consecutive minimum scheduling time units for transmitting retransmission data of the first data may be used by HARQ process 2. To ensure continuity in timing, HARQ process 2 uses the first 2 smallest scheduling time units, i.e., the smallest scheduling time units numbered 13 and 14, of the set of 4 consecutive smallest scheduling time units for transmitting retransmission data of the first data, in addition to the smallest scheduling time unit allocated to HARQ process 2 itself, while HARQ process 0 uses the last two smallest scheduling time units, i.e., the smallest scheduling time units numbered 13 and 14.

Taking fig. 5 as an example, assuming that the first process is HARQ process 0, m is 4, and n is 7, then G₁＝2，m-L₁That is, the first communication device may map retransmission data of the first data onto 7 minimum scheduling time units in a time sequence of the first process, and the remaining 1 minimum scheduling time unit of 2 groups of 4 consecutive minimum scheduling time units may be used by HARQ process 1. To ensure the continuity in timing, HARQ process 1 uses the last 1 minimum scheduling time unit of the first process, i.e., the minimum scheduling time unit numbered 28, and HARQ process 0 uses the first 3 minimum scheduling time units, i.e., the minimum scheduling time units numbered 25-27, in addition to the minimum scheduling time unit allocated to HARQ process 1 itself.

Optionally, sending the retransmission data of the first data through the first process may further include: the first communication apparatus notifies the second communication apparatus of at least one of n and RV, that is, transmits information indicating at least one of n and RV to the second communication apparatus, so that the system can be made more robust. The first communication apparatus may notify the second communication apparatus of at least one of n and RV at the same time as or before transmission of the retransmission data of the first data.

Second, when the first communication device converts n to k

The first communication device transmits retransmission data of the first data according to the k minimum scheduling time units. Specifically, when k is less than m, transmitting the retransmission data of the first data according to k minimum scheduling time units includes: transmitting, by the first process, retransmission data of the first data over k consecutive minimum scheduled time units, and transmitting, by the second process, second data over the set of m-k consecutive minimum scheduled time units of the retransmission data of the first data; or when k is larger than m, mapping the retransmission data of the first data to k minimum scheduling time units according to the time sequence of the first process, wherein the k minimum scheduling time units are distributed in G₂Ceil is a rounding-up operation on a set of m consecutive minimum scheduling time units, ceil is a rounding-up operation, and on the G-th₂m-L in group of m consecutive minimum scheduling time units₂Sending second data through a second process on continuous minimum scheduling time units, wherein the second process is an adjacent process of the first process, L₂K mod m, mod being a modulo operation; alternatively, when k > m, the first communication apparatus transmits the retransmission data of the first data through the first process over m consecutive minimum scheduling time units, in which case the retransmission of the first data is terminated early. M-k or m-L as mentioned above₂The consecutive minimum scheduled time units can be regarded as the remaining retransmission resources of the first process.

The second process is also a process adjacent to the first process, and for the description of the second process and the first process, reference may be made to the description of the above embodiment, which is not described herein again. It is understood that the first communication device transmits the retransmission data of the first data according to the k minimum scheduling time units in a similar process to the transmission of the retransmission data of the first data according to the n minimum scheduling time units.

The second process may be a previous process of the first process or a subsequent process of the first process, and further, in order to ensure continuity in time sequence, when the second process is a previous process of the first process, the remaining retransmission resources of the first process may be arranged in front of the m consecutive minimum scheduling time units in which the remaining retransmission resources are located, as shown in fig. 4, and when the second process is a subsequent process of the first process, the remaining retransmission resources of the first process may be arranged behind the m consecutive minimum scheduling time units in which the remaining retransmission resources are located, as shown in fig. 5.

Optionally, in the method, the sending the retransmission data of the first data through the first process may further include: and sending the information indicating k to the second communication device. Optionally, the first communication device may further send information indicating the RV to the second communication device. Similarly, the first communication device may transmit the information indicating k and/or RV to the second communication device simultaneously with or before transmitting the retransmission data of the first data.

In the synchronous HARQ, by designing the HARQ process and the related timing sequence, the retransmission resources (remaining retransmission resources) saved in one process are shared with the primary transmission data or the retransmission data of other processes, so that the time domain resources can be fully utilized to transmit useful data, the achievable rate can be improved, and the collision of feedback and retransmission among different packets can be avoided.

Optionally, for the case that n > m or k > m, the second communications apparatus may decode the received data of a group of m consecutive minimum scheduling time units, or may decode the received data of n or k consecutive minimum scheduling time units after all the received data of n or k consecutive minimum scheduling time units are received, which is not limited in the embodiment of the present invention.

Optionally, for the synchronous HARQ, it may be determined to which process the retransmission resource saved by the first process is used according to a preset rule, where the preset rule may be, for example: preferentially sharing the retransmission resources saved by the first process to the HARQ process with newly transmitted data and preferentially sharing the retransmission resources saved by the first process to the prior process; optionally, if the processes adjacent to the first process are all retransmission data, the retransmission data is used for the processes requiring more resources according to the retransmission needs of the adjacent processes, and if the adjacent processes do not require the retransmission resources remaining in the first process, the retransmission data is used for the retransmission of the first process itself. For example, assume that there are three processes, HARQ processes 0-2, the first process is HARQ process 1, HARQ process 0 and HARQ process 2 are adjacent processes to HARQ process 1, if HARQ process 2 is newly transmitted data and HARQ process 0 is retransmitted data, then HARQ process 1 saves retransmission resources for HARQ process 2, if HARQ processes 0 and 2 are both newly transmitted data, HARQ process 1 saves retransmission resources for HARQ process 0, if HARQ processes 0 and 2 are both retransmitting data, and HARQ process 2 retransmissions require more than m consecutive minimum scheduling time units, HARQ process 1 saves retransmission resources for HARQ process 2, if HARQ processes 0 and 2 are both retransmission data, but if HARQ processes 0 and 2 do not need more than m consecutive minimum scheduling time units for retransmission, the retransmission resources saved by HARQ process 1 are left for retransmission.

In addition, after the first communication device determines to which process the retransmission resource saved by the first process is used, the determined process using the retransmission resource saved by the first process is also referred to as a second process, and thus, when the second process uses the retransmission resource saved by the first process to perform data transmission, the second process can further notify the second communication device of the resource information used by the second process, so that the system can be more robust.

In addition, for the asynchronous HARQ, sending the initial transmission data or the retransmission data of the first data through the first process may further include: and sending information indicating the process number of the first process to the second communication device, where the method for sending the process number information by the first communication device is not limited in the embodiment of the present invention. It is to be understood that, for asynchronous HARQ, corresponding to a case where the first communication apparatus does not convert n, transmitting retransmission data of the first data through the first process may further include: similarly, the first communication device may transmit at least one of n and RV to the second communication device simultaneously with or before transmitting the retransmission data of the first data; the first process may be configured to transmit retransmission data of the first data corresponding to a case where the first communication apparatus converts n into k, and may further include: similarly, the first communication device may transmit at least one of k and RV to the second communication device simultaneously with or before transmitting the retransmission data of the first data.

Optionally, in the data transmission method provided in the embodiment of the present invention, whether for synchronous HARQ or asynchronous HARQ, the sending, by the first communication device, initial transmission data of the first data through the first process over m consecutive minimum scheduling time units may further include: and sending at least one of m and RV to the second communication device. Similarly, the first communication device may transmit at least one of m and RV to the second communication device simultaneously with or before transmitting the initial transmission data of the first data. Optionally, m is variable in order to improve coding gain in a narrowband scenario.

It is understood that in the embodiment of the present invention, information such as m, n, k, RV, and a process number may be transmitted through control information.

It should be noted that, the HARQ process timing diagrams shown in fig. 4 to 6 are illustrated by taking 3 processes as an example, and the data transmission method under other number of processes is similar to the embodiment of the present invention.

S305, the second communication device receives the retransmission data of the first data sent by the first communication device through the first process.

After the first communication device sends the retransmission data of the first data through the first process in the manner described in S304, the second communication device receives and decodes the retransmission data, and sends the reception acknowledgement information and the retransmission resource indication.

The data transmission method provided by the embodiment of the invention improves the rate of data transmission by adopting an HARQ transmission mechanism through retransmission according to needs, thereby realizing the relative balance among the transmission rate, the transmission delay and the transmission reliability.

The first communication device and the second communication device in the embodiments of the present invention may be any of a transmitting-end device and a receiving-end device that perform data transmission wirelessly. The first communication device and the second communication device may be any device with wireless transceiving function, including but not limited to: the wireless access network system comprises a base station, an access node, a wireless relay node, a wireless backhaul node, a terminal and the like in a WiFi system, wherein the terminal can communicate with one or more core networks through a Radio Access Network (RAN) or directly communicate with other terminals in a wireless manner.

It should be noted that the data transmission method provided in the embodiment of the present invention may be applicable to downlink data transmission, may also be applicable to uplink data transmission, and may also be applicable to device-to-device (D2D) data transmission. For downlink data transmission, the first communication device may be a base station and the corresponding second communication device may be a terminal. For uplink data transmission, the first communication device may be a terminal and the corresponding second communication device may be a base station. For data transmission of D2D, the first communication device is a first terminal and the corresponding second communication device is a second terminal. The embodiment of the invention does not limit the application scenarios.

In the embodiments provided by the present invention, the data transmission method provided by the embodiments of the present invention is introduced from the perspective of each network element itself and from the perspective of interaction between network elements. It is to be understood that each network element, such as a terminal, a base station, etc., includes corresponding hardware structures and/or software modules for performing each function in order to implement the functions described above. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software, with the exemplary elements and algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

Fig. 7 is a schematic structural diagram of a possible communication device according to an embodiment of the present invention. The communication device can realize the function of the first communication device in the data transmission method embodiment, and therefore, the beneficial effects of the data transmission method can also be realized. The communication device includes a processor 701 and a transceiver 702.

The transceiver 702 is configured to transmit initial transmission data of first data through a first process over m consecutive minimum scheduling time units, and receive negative acknowledgement information (NACK) of the first data and a retransmission resource indication, where the retransmission resource indication includes information indicating n, and n is used to determine the number of minimum scheduling time units required for transmitting retransmission data of the first data, where m and n are positive integers;

the processor 701 is configured to determine retransmission data of the first data according to a Redundancy Version (RV) and n; and the transceiver 702 is further configured to transmit the retransmission data of the first data determined by the processor 701 through the first process.

Further, the manner in which the processor 701 determines the retransmission data of the first data according to the Redundancy Versions (RV) and n may refer to the corresponding description in the method embodiment.

The transceiver 702 may be specifically configured to send retransmission data of the first data through the first process according to a corresponding manner described in the method embodiments.

The transceiver 702 may also be configured to transmit information indicative of at least one of n and RV; alternatively, the transceiver 702 may be configured to transmit information indicating k; or transceiver 702 may be further configured to transmit information indicating a process number of the first process.

It should be noted that, the manner in which the transceiver sends the information indicating m, n, RV, k and the process number may refer to the relevant description in the method embodiment.

The communication device provided by the embodiment of the invention improves the data transmission rate by adopting the HARQ transmission mechanism through retransmission according to needs, thereby realizing the relative balance among the transmission rate, the transmission delay and the transmission reliability. Furthermore, the retransmission resources (remaining retransmission resources) saved in one process are shared with the initial transmission data or the retransmission data of other processes, so that the time domain resources can be fully utilized to transmit useful data, the achievable rate is improved, and the collision of feedback and retransmission among different packets is avoided.

It will be appreciated that fig. 7 only shows one design of the communication device. In practice, the communication device may include any number of processors and transceivers, and all communication devices that may implement embodiments of the present invention are within the scope of the present invention.

Fig. 8 is a schematic structural diagram of another communication device according to an embodiment of the present invention. The communication device realizes the function of the first communication device in the data transmission method embodiment, and therefore, the beneficial effects of the data transmission method can be realized. The communication apparatus includes a processing unit 801 and a transceiving unit 802. The processing unit 801 implements corresponding functions in the processor 701, and the transceiver unit 802 implements corresponding functions in the transceiver 702.

In the communication apparatus in the embodiments shown in fig. 7 and fig. 8, the communication apparatus may be a UE, a base station, or other equipment for data communication to which the HARQ technology is applied.

Fig. 9 is a schematic structural diagram of a possible communication device according to an embodiment of the present invention. The communication device can realize the function of the second communication device in the data transmission method embodiment, so that the beneficial effects of the data transmission method can be realized. The communication device includes a receiver 901 and a transmitter 902.

The receiver 901 is configured to receive initial transmission data of first data, where the initial transmission data of the first data is data sent through a first process over m consecutive minimum scheduling time units, where m is a positive integer;

a transmitter 902 configured to transmit NACK of the first data and a retransmission resource indication, wherein the retransmission resource indication includes information indicating n, n being used to determine a number of minimum scheduling time units required for transmitting retransmission data of the first data;

the receiver 901 is further configured to receive retransmission data of the first data, wherein the retransmission data of the first data is sent by the first process and is determined according to the redundancy version and n.

The specific implementation of the receiver 901 may refer to the related description in the method embodiment.

Further, the communication device may further comprise a processor for determining n, which may be determined, for example, based on characteristics of the received signal.

It will be appreciated that fig. 9 only shows one design of the communication device. In practical applications, the communication device may include any number of transmitters, receivers and processors, and all communication devices that may implement embodiments of the present invention are within the scope of the present invention.

Fig. 10 is a schematic structural diagram of another communication device according to an embodiment of the present invention. The communication device realizes the function of the second communication device in the data transmission method embodiment, so that the beneficial effects of the data transmission method can be realized. The communication apparatus includes a receiving unit 1001 and a transmitting unit 1002. The receiving unit 1001 implements the corresponding functions in the receiver 901, and the transmitting unit 1002 implements the corresponding functions in the transmitter 902.

In the communication apparatus in the embodiments shown in fig. 9 and fig. 10, the communication apparatus may be a UE, a base station, or other equipment for data communication to which the HARQ technology is applied.

Further, fig. 11 shows a schematic diagram of a possible structure of the base station involved in the above embodiment.

The illustrated base station includes a transceiver 1102 and a controller/processor 1104. The transceiver 1102 may be used for supporting the transceiving of information between the base station and the terminal as described in the above-mentioned embodiments, and for supporting the radio communication between the terminal and other terminals. The controller/processor 1104 may be used to perform various functions for communicating with terminals or other network devices. In the uplink, uplink signals from the terminal are received via the antenna, conditioned by the transceiver 1102, and further processed by the controller/processor 1104 to recover the traffic data and signaling information sent by the terminal. On the downlink, traffic data and signaling messages are processed by a controller/processor 1104 and conditioned by a transceiver 1102 to generate a downlink signal, which is transmitted via an antenna to the terminals. The transceiver 1102 is also configured to perform the data transmission method as described in the above embodiments, for example, the transceiver includes a transmitter and a receiver. In the context of downstream data transmission, the transceiver is configured to perform the functions of the first data transmission device in the embodiments corresponding to fig. 3 to 6. In the context of uplink data transmission, the transceiver is configured to perform the functions of the second data transmission apparatus in the corresponding embodiments of fig. 3 to 6. The controller/processor 1104 may also be used to perform the processes of fig. 3-6 related to base stations and/or other processes for the techniques described herein. The base station may also include a memory 1106 that may be used to store program codes and data for the base station. The base station may further comprise a communication unit 1108 for supporting the base station to communicate with other network entities. It will be appreciated that fig. 11 only shows a simplified design of a base station. In practice, the base station may comprise any number of transceivers, processors, controllers, memories, communication units, etc., and all base stations that can implement the present invention are within the scope of the present invention.

Fig. 12 shows a simplified schematic diagram of a possible design structure of the terminal involved in the above-described embodiment. The terminal includes a transceiver 1204, a controller/processor 1206, and may also include a memory 1208 and a modem processor 1202.

The transceiver 1204 conditions (e.g., converts to analog, filters, amplifies, and frequency upconverts, etc.) the output samples and generates an uplink signal, which is transmitted via an antenna to the base station as described in the embodiments above. On the downlink, the antenna receives the downlink signal transmitted by the base station in the above embodiment. The transceiver 1204 conditions (e.g., filters, amplifies, frequency downconverts, and digitizes, etc.) the received signal from the antenna and provides input samples. Within modem processor 1202, an encoder 1212 receives traffic data and signaling messages to be transmitted on the uplink and processes (e.g., formats, encodes, and interleaves) the traffic data and signaling messages. A modulator 1214 further processes (e.g., symbol maps and modulates) the encoded traffic data and signaling messages and provides output samples. A demodulator 1218 processes (e.g., demodulates) the input samples and provides symbol estimates. A decoder 1212 processes (e.g., deinterleaves and decodes) the symbol estimates and provides decoded data and signaling messages for transmission to the terminals. Encoder 1212, modulator 1214, demodulator 1218, and decoder 1216 may be implemented by a combined modem processor 1202. These elements are processed in accordance with the radio access technology employed by the radio access network (e.g., the access technologies of LTE and other evolved systems). The controller/processor 1206 controls and manages the operation of the terminal for performing the processing performed by the terminal in the above-described embodiments. The transceiver 1204 includes, for example, a transmitter and a receiver. In the context of downstream data transmission, the transmitter and receiver are configured to perform the functions of the second data transmission apparatus in the corresponding embodiments of fig. 2 to 6. In the context of uplink data transmission, the transmitter and receiver are configured to perform the functions of the first data transmission device in the corresponding embodiments of fig. 3 to 6. In the D2D data transmission scenario, the terminal at the transmitting end is configured to perform the functions of the first data transmission apparatus in the corresponding embodiment of fig. 3 to 6, and the terminal at the receiving end is configured to perform the functions of the second data transmission apparatus in the corresponding embodiment of fig. 3 to 6. The controller/processor 1206 may also be used to perform the processes of fig. 2-6 related to the terminal and/or other processes for the techniques described herein. A memory 1208 is used to store program codes and data for the terminal.

The controller/processor for implementing the base station, UE, base station or control node in the above embodiments may be a Central Processing Unit (CPU), general purpose processor, Digital Signal Processor (DSP), Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others.

It should be noted that the data transmission method and the communication apparatus provided by the above embodiments of the present invention can be applied to any scenario with data transmission, and are not limited to services with higher transmission rate requirement, transmission delay requirement, and transmission reliability requirement.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may consist of corresponding software modules that may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a terminal. Of course, the processor and the storage medium may reside as discrete components in a terminal.

Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.

Claims

1. A method of data transmission, comprising:

sending initial transmission data of first data through a first process on m continuous minimum scheduling time units, wherein m is a positive integer;

receiving negative acknowledgement information (NACK) of the first data and a retransmission resource indication, wherein the retransmission resource indication comprises information indicating n, n is used for determining the number of minimum scheduling time units required for transmitting retransmission data of the first data, and n is a positive integer;

determining retransmission data of the first data according to Redundancy Version (RV) and n;

transmitting, by the first process, retransmission data of the determined first data;

wherein the sending of the retransmission data of the first data by the first process includes: transmitting retransmission data of the first data according to the n minimum scheduling time units;

wherein, when n > m, the transmitting the retransmission data of the first data according to the n minimum scheduling time units comprises:

mapping the retransmission data of the first data to n minimum scheduling time units according to the time sequence of the first process, wherein the n minimum scheduling time units are distributed on m continuous minimum scheduling time units of a G1-ceil (n/m) group, wherein ceil is an upward rounding operation; and

and sending second data through a second process on m-L1 continuous minimum scheduling time units in the G1 th group of m continuous minimum scheduling time units, wherein the second process is a neighboring process of the first process, and L1 is n mod m, and mod is a modulus operation.

2. The method of claim 1, wherein when n < m, the transmitting the retransmission data of the first data according to the n minimum scheduling time units comprises:

transmitting retransmission data of the first data through a first process on n consecutive minimum scheduling time units;

and transmitting second data through a second process on m-n consecutive minimum scheduling time units in the set of m consecutive minimum scheduling time units for transmitting retransmission data of the first data, wherein the second process is an adjacent process of the first process.

3. The method of any of claims 1-2, wherein the sending, by the first process, the retransmission data for the first data further comprises: information indicating at least one of n and RV is transmitted.

4. The method of claim 1, wherein the determining retransmission data for the first data according to RV and n comprises: determining retransmission data of the first data according to the RV and the k; the sending, by the first process, the retransmission data of the first data includes: and transmitting retransmission data of the first data according to k minimum scheduling time units, wherein the k is obtained based on n transformation.

5. The method of claim 4, wherein when k < m, the transmitting the retransmission data of the first data according to k minimum scheduling time units comprises:

the method comprises the steps of transmitting retransmission data of first data through a first process on k continuous minimum scheduling time units, and transmitting second data through a second process on m-k continuous minimum scheduling time units in the group of m continuous minimum scheduling time units for transmitting the retransmission data of the first data, wherein the second process is a neighboring process of the first process.

6. The method of claim 4, wherein when k > m, the transmitting the retransmission data of the first data according to k minimum scheduling time units comprises:

mapping the retransmission data of the first data to k minimum scheduling time units according to the time sequence of the first process, wherein the k minimum scheduling time units are distributed on m continuous minimum scheduling time units in a G2-ceil (k/m) group, and ceil is rounding-up operation;

and

and sending second data through a second process on m-L2 continuous minimum scheduling time units in the G2 th group of m continuous minimum scheduling time units, wherein the second process is a neighboring process of the first process, L2 is k mod m, and mod is a modulus operation.

7. The method according to any of claims 4-6, wherein said sending the retransmission data of the first data by the first process further comprises: information indicating k is transmitted.

8. A data transmission method, characterized in that it comprises all the features of the method of any one of claims 1 to 7 and,

the sending of the initial transmission data of the first data through the first process further comprises: sending information indicating a process number of the first process; and the sending, by the first process, retransmission data of the first data, further comprising: and sending information indicating the process number of the first process.

9. A method of data transmission, comprising:

wherein the content of the first and second substances,

the determining the retransmission data of the first data according to the RV and the n comprises: determining retransmission data of the first data according to the RV and the k; the sending, by the first process, the retransmission data of the first data includes: transmitting retransmission data of the first data according to k minimum scheduling time units, wherein k is obtained based on n transformation;

wherein, when k > m, the transmitting the retransmission data of the first data according to k minimum scheduling time units comprises:

and

10. A method of data transmission, comprising:

receiving initial transmission data of first data, wherein the initial transmission data of the first data is data sent by a first process on m continuous minimum scheduling time units, and m is a positive integer;

transmitting NACK and retransmission resource indication of the first data, wherein the retransmission resource indication comprises information indicating n, and n is used for determining the number of minimum scheduling time units required for transmitting the retransmission data of the first data;

receiving retransmission data of the first data, wherein the retransmission data of the first data is transmitted by the first process and is determined according to a redundancy version and n;

wherein the receiving of the retransmission data of the first data comprises:

receiving retransmission data of the first data, wherein the retransmission data of the first data is mapped onto n minimum scheduling time units according to the time sequence of the first process, wherein the n minimum scheduling time units are distributed on m consecutive minimum scheduling time units of a G1 (ceil (n/m) group, and ceil is an rounding-up operation; and

receiving second data sent by a second process, wherein the second data is in m-L1 consecutive minimum scheduling time units in a G1-th group of m consecutive minimum scheduling time units, the second process is a neighboring process of the first process, L1 is n mod m, mod is a modulo operation, and n > m.

11. The method of claim 10, wherein the receiving the retransmission data of the first data comprises:

receiving retransmission data of first data transmitted through a first process on n consecutive minimum scheduling time units; and the number of the first and second groups,

receiving second data transmitted by a second process at m-n consecutive minimum scheduling time units in the set of m consecutive minimum scheduling time units for transmitting retransmission data of the first data, wherein the second process is a neighboring process of the first process, and n < m.

12. The method of claim 10 or 11, further comprising receiving information indicating at least one of n and RV.

13. The method of claim 10, wherein the receiving the retransmission data of the first data comprises:

receiving retransmission data of first data transmitted through a first process over k consecutive minimum scheduling time units; and the number of the first and second groups,

receiving second data transmitted by a second process at m-k continuous minimum scheduling time units in the group of m continuous minimum scheduling time units for transmitting retransmission data of the first data, wherein the second process is a neighboring process of the first process, k is less than m, and k is obtained based on n transformation.

14. The method of claim 10, wherein the receiving the retransmission data of the first data comprises:

receiving retransmission data of the first data, wherein the retransmission data of the first data is mapped onto k minimum scheduling time units according to the time sequence of the first process, wherein the n minimum scheduling time units are distributed on m consecutive minimum scheduling time units of a G2-ceil (k/m) group, wherein ceil is an rounding-up operation; and

receiving second data sent by a second process, wherein the second data is in m-L2 continuous minimum scheduling time units in a G2 group of m continuous minimum scheduling time units, the second process is a neighboring process of the first process, L2 is k mod m, mod is a modulus operation, k is more than m, and k is obtained based on n transformation.

15. The method according to claim 13 or 14, characterized in that the method further comprises: information indicative of k is received.

16. A data transmission method, characterized in that it comprises all the features of the method of any one of claims 10 to 15 and,

the receiving of the initial transmission data of the first data further includes: receiving information indicating a process number of the first process;

receiving retransmission data of the first data, further comprising: receiving information indicating a process number of the first process.

17. A method of data transmission, comprising:

the receiving retransmission data of the first data comprises:

18. A communications apparatus, comprising: a transceiver and a processor;

the transceiver is used for sending initial transmission data of first data through a first process on m continuous minimum scheduling time units, and receiving negative acknowledgement information (NACK) of the first data and retransmission resource indication, wherein the retransmission resource indication comprises information indicating n, and n is used for determining the number of minimum scheduling time units required by transmitting the retransmission data of the first data, and m and n are positive integers;

the processor is configured to determine retransmission data of the first data according to a Redundancy Version (RV) and n; and the transceiver is further configured to send, through the first process, retransmission data of the first data determined by the processor;

wherein the transceiver is in particular configured to transmit retransmission data of the first data over the first process according to the method of any of claims 1-3.

19. The apparatus of claim 18, wherein the transceiver is further configured to send information indicating at least one of n and RV.

20. The apparatus of claim 19, wherein the processor is further configured to determine retransmission data for the first data based on RV and k, wherein k is derived based on n-transform.

21. The apparatus of claim 20, wherein the transceiver is specifically configured to send the retransmission data of the first data through a first process according to the method of claim 9.

22. The apparatus of claim 20 or 21, wherein the transceiver is further configured to transmit information indicating k.

23. The apparatus of any of claims 18-21, wherein the transceiver is further configured to send information indicating a process number of the first process.

24. A communication device comprising a receiver and a transmitter;

the receiver is configured to receive initial transmission data of first data, where the initial transmission data of the first data is data sent through a first process over m consecutive minimum scheduling time units, where m is a positive integer;

the transmitter is configured to transmit NACK of the first data and a retransmission resource indication, where the retransmission resource indication includes information indicating n, and n is used to determine the number of minimum scheduling time units required for transmitting retransmission data of the first data;

the receiver is further configured to receive retransmission data of the first data, wherein the retransmission data of the first data is sent by the first process and is determined according to a redundancy version and n;

wherein the receiver is further configured to perform the method of any of claims 10-17.

25. A computer-readable medium comprising, in combination,

the computer-readable medium stores a computer program which, when executed by a computer, is capable of implementing the method of any one of claims 1 to 9.

26. A computer-readable medium comprising, in combination,

the computer-readable medium stores a computer program which, when executed by a computer, is capable of implementing the method of any one of claims 10 to 17.