WO2018027588A1

WO2018027588A1 - Data transmission method and communication apparatus

Info

Publication number: WO2018027588A1
Application number: PCT/CN2016/094233
Authority: WO
Inventors: 张长; 周国华
Original assignee: 华为技术有限公司
Priority date: 2016-08-09
Filing date: 2016-08-09
Publication date: 2018-02-15
Also published as: CN109565368B; CN109565368A

Abstract

Provided in embodiments of the present application are a method and an apparatus for transmitting data. Over a number m of consecutive smallest dispatching time units, sending initial transmission data of first data via a first process, and determining retransmission data of said first data according to a redundancy version (RV) and a retransmission resource; sending the determined retransmission data of the first data via the first process, so as to realize balance between transmission speed, transmission time delay and transmission reliability.

Description

Data transmission method and communication device

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a data transmission method and apparatus.

Background technique

The uplink data and the downlink data in the 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 two key technologies: adaptive modulation and coding (AMC) and hybrid automatic repeat request (HARQ).

The AMC is a process of determining a modulation and coding scheme (MCS) of data transmission according to channel state information (CSI), wherein the CSI is estimated based on reference signals (RS) measurements. For uplink communication, the base station first estimates the uplink CSI according to the RS measurement sent by the user equipment (UE), then determines the MCS of the uplink data communication according to the CSI, and finally notifies the UE by using the downlink control channel; and for the downlink communication, the base station first sends the uplink communication. The RS is used by the UE to estimate the downlink CSI and report the downlink CSI to the base station. Finally, the base station determines the MCS of the downlink data communication according to the obtained CSI. The PUSCH and PDSCH of the current LTE system generally affect the selection of the MCS by controlling the initial block error rate (IBLER) target value (for example, 10%).

For reliable transmission of data, the LTE system introduces HARQ technology based on AMC. HARQ is a technology that combines forward error correction (FEC) and automatic repeat request (ARQ). The second communication device can correct part of the error data through FEC technology, for errors that cannot be corrected. The data packet, the second communication device requests the first communication device to retransmit the data of the original transport block (TB). For The continuous data transmission can be performed between the first communication device and the second communication device adopting the HARQ technology, and a multi-HARQ process mechanism can be introduced. When the data of one HARQ process is waiting for feedback from the receiving end, other HARQ processes can be adopted. Continue with the data transfer.

The performance requirements of the service include three dimensions: transmission rate, transmission delay, and transmission reliability. The existing broadband system design is more about how to improve the transmission rate and transmission reliability. For example, HARQ is a technology to effectively improve the transmission rate under the premise of ensuring transmission reliability, but the introduction of HARQ is sacrificed to some extent. The transmission delay. 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 meet the requirements of these three aspects at the same time.

Summary of the invention

Embodiments of the present invention provide a data transmission method and a communication device to achieve a relative balance between a transmission rate, a transmission delay, and a transmission reliability.

The embodiment of the present invention can be specifically implemented by the following technical solutions:

In a first aspect, a data transmission method is provided, the method comprising: transmitting, at a m consecutive minimum scheduling time unit, initial transmission data of a first data by a first process, where the m is a positive integer; receiving Negative acknowledgement information (NACK) of the first data and retransmission resource indication, wherein the retransmission resource indication includes information indicating n, and n is used to determine a minimum required to transmit retransmission data of the first data a number of scheduling time units, where n is a positive integer; determining retransmission data of the first data according to a redundancy version (RV) and n; transmitting, by the first process, retransmission of the determined first data data.

The above data transmission method improves the rate of data transmission by using the HARQ transmission mechanism by retransmission on demand, thereby achieving a relative balance between transmission rate, transmission delay and transmission reliability.

The data transmission method is applicable to data transmission of downlink data transmission, uplink data transmission, or device to device (D2D). For example, in downlink data transmission, the method It can be performed by the base station; in uplink data transmission or D2D data transmission, the method can be performed by the terminal.

In a possible design, the retransmission data of the first data is sent by the first process by: transmitting retransmission data of the first data according to n minimum scheduling time units.

In one possible design, the retransmission data of the first data is transmitted by the first process on the n consecutive minimum scheduling time units; and the set of m consecutive data of the retransmission data of the first data is transmitted. The second data is sent by the second process on the mn consecutive minimum scheduling time units in the minimum scheduling time unit, where the second process is an adjacent process of the first process, where n<m.

In a possible design, the retransmission data of the first data is mapped to n minimum scheduling time units according to the timing of the first process, wherein the n minimum scheduling time units are distributed at G ₁ =ceil (n / m) groups on m consecutive minimum scheduling time unit, wherein the ceil is a ceil operation; and mL in group G ₁ m consecutive minimum scheduling time unit _a consecutive minimum scheduling time unit Transmitting, by the second process, the second data, where the second process is an adjacent process of the first process, L ₁ =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 may be transmitted such that the receiving end may know the information of n and/or RV, thereby increasing the robustness of the system.

In a possible design, after receiving the retransmission resource indication, it is also possible to transform n into k, and then use k to determine the retransmission data of the first data.

In one possible design, the retransmission data of the first data is transmitted by the first process on the k consecutive minimum scheduling time units, and the set of m consecutive data of the retransmission data of the first data is transmitted. The second data is sent by the second process on the mk consecutive minimum scheduling time units in the minimum scheduling time unit, where the second process is an adjacent process of the first process, k<m.

In a possible design, the retransmission data of the first data is mapped to k minimum scheduling time units according to the timing of the first process, wherein the k minimum scheduling time units are distributed at G ₂ =ceil (k / m) groups on m consecutive minimum scheduling time unit, ceil to ceil operation; on and mL in group G ₂ m consecutive minimum scheduling time unit of _two consecutive minimum scheduling time unit, Sending, by the second process, the second data, where the second process is an adjacent process of the first process, L ₂ =k mod m, mod is a modulo operation, and k>m.

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

The above several design schemes can be applied to the data transmission scenario using the synchronous HARQ mechanism. By designing the HARQ process and related timing, the retransmission resources saved in one process are shared with the initial data of other processes or the data is retransmitted. Therefore, the time domain resources can be fully utilized to transmit useful data, which is beneficial to improve the reachability rate and avoid conflicts between different packets and feedback.

In a possible design, for asynchronous HARQ, while transmitting the initial data of the first data or transmitting the retransmission data of the first data, or transmitting the initial data of the first data or transmitting the retransmission of the first data Before the data, information indicating the process number of the first process may be sent, so that the receiving end can learn the process information and increase the robustness of the system.

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 increase the coding gain in a narrowband scene.

In one possible design, information such as m, n, k, RV, and process number can be passed through control information.

In a possible design, for the synchronous HARQ, it may be determined according to a preset rule to which process the retransmission resource saved by the first process is used, and the predetermined rule may be, for example, preferentially saving the first process. The retransmission resource is shared with the HARQ process with the newly transmitted data and is preferentially shared to the prior process; optionally, if the adjacent process of the first process is retransmitted, according to the retransmission needs of the adjacent process, The process of using more resources is used as a retransmission of the first process itself if the adjacent process does not need the remaining retransmission resources of the first process.

In a possible design, in order to ensure continuity in timing, when the second process is a prior process of the first process, the remaining retransmission resources of the first process may be arranged in the m where the remaining retransmission resources are located. The preceding one of the consecutive minimum scheduling time units, when the second process is the subsequent process of the first process, the remaining retransmission resources of the first process may be arranged in the m consecutive minimum of the remaining retransmission resources. Scheduled later in the time unit.

In a possible design, when the second process uses the retransmission resource saved by the first process for data transmission, the resource information used by the second process may be further notified to the second communication device, thereby making the system more robust. .

Corresponding to the data transmission method of the first aspect, the second aspect, further provides a data transmission method, including: receiving initial data of the first data, where the initial data of the first data is in m consecutive Data transmitted by the first process on the minimum scheduling time unit, wherein the m is a positive integer; the NACK and the retransmission resource indication of the first data are sent, wherein the retransmission resource indication includes an indication n Information, n for determining the number of minimum scheduling time units required to transmit the retransmission data of the first data; receiving retransmission data of the first data, wherein the retransmission data of the first data is passed The first process sends and is determined according to the redundancy version and n.

The data transmission method is applicable to data transmission of downlink data transmission, uplink data transmission, or device to device (D2D). For example, in uplink data transmission, the method can be performed by a base station; in downlink data transmission or D2D data transmission, the method can be performed by a terminal.

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

In a possible design, the NACK feedback is performed through the existing ACK/NACK signal format, and the retransmission resource indication is carried by the control information, such as the downlink control information or the uplink control information; or, the existing ACK/NACK may also be used. The signal format is extended based on the existing ACK/NACK signal to carry the retransmission resource indication.

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

In one possible design, on n consecutive minimum scheduling time units, receiving retransmission data of the first data transmitted by the first process; and transmitting the group of retransmitted data of the first data Receiving, by the mn consecutive minimum scheduling time units in the consecutive minimum scheduling time units, the second data sent by the second process, wherein the second process is an adjacent process of the first process, n< m.

In a possible design, the retransmission data of the first data is received by: receiving retransmission data of the first data, wherein the retransmission data of the first data is according to the first The timing of the process is mapped to the n minimum scheduling time units, wherein the n minimum scheduling time units are distributed on the m consecutive minimum scheduling time units of the G1=ceil(n/m) group, where the ceil is rounded up. Computing; and receiving second data transmitted by the second process, wherein the second data is on m-L1 consecutive minimum scheduling time units in the m consecutive minimum scheduling time units of the G1 group, the second The process is an adjacent process of the first process, L1=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 on k consecutive minimum scheduling time units; and the set of m of retransmitted data of the first data is transmitted Receiving, by the mk consecutive minimum scheduling time units in the consecutive minimum scheduling time units, the second data sent by the second process, where the second process is an adjacent process of the first process, k< m, the k is obtained based on the n-transform.

In a possible design, the retransmission data that receives the first data is implemented by: receiving retransmission data of the first data, where retransmission data of the first data According to the timing of the first process, mapping to k minimum scheduling time units, where n minimum scheduling time units are distributed in m consecutive minimum scheduling time units of G2=ceil(k/m) group, Wherein ceil is an upward rounding operation; and receiving second data transmitted by the second process, wherein the second data is m-L2 consecutive minimum scheduling time units in the m consecutive minimum scheduling time units of the G2 group The second process is an adjacent process of the first process, L2=k mod m, mod is a modulo operation, k>m, and the k is obtained based on the n transform.

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

In the above design scheme, by designing the HARQ process and related timing, the retransmission resources saved in one process are shared with the initial data of other processes or the data is retransmitted, so that the time domain resources can be fully utilized to transmit the useful data. It is beneficial to improve the reachability rate and avoid conflicts between different packets and feedback.

In a possible design, for asynchronous HARQ, while receiving the initial data of the first data or receiving the retransmission data of the first data, or receiving the initial data of the first data or receiving the retransmission of the first data Before the data, information indicating the process number of the first process may be received, so that the receiving end can learn the process information and increase the robustness of the system.

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

In still another aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions used in the communication device of the third aspect, which includes a program designed to perform the above aspects.

In still another aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for use in the communication device of the fourth aspect, which includes a program designed to perform the above aspects.

DRAWINGS

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

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

3 is a schematic flowchart of a data transmission method according to an embodiment of the present invention;

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

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

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

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

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

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

FIG. 10 is a schematic structural diagram of a communication apparatus 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 disclosure;

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 are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope shall fall within the 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 is applicable.

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

The communication system can be applied to long term evolution (LTE) and future-oriented communication technologies and the like. As long as the communication system faces a problem similar to that mentioned in the background of the present application, the technical solution provided by the embodiment of the present invention is applicable. The system architecture and the service scenario described in the embodiments of the present invention are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present invention, and do not constitute a limitation of the technical solutions provided by the embodiments 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 wireless communication function for a terminal. The base station 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 a system employing different radio access technologies, the name of a device having a base station function may be different, for example, in an LTE system, referred to as an evolved Node B (eNB or eNodeB). For convenience of description, in all embodiments of the present invention, the above-mentioned devices for providing wireless communication functions to terminals are collectively referred to as base stations.

The terminals involved in the embodiments of the present invention may include various handheld devices having wireless communication functions, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to the wireless modem. The terminal may also be referred to as a mobile station (MS), user equipment, terminal equipment, and may also include a subscriber unit (uniscriber uni t), a cellular phone (cellular phone), and a smart device. Smart phone, wireless data card, personal digital assistant (PDA) computer, tablet computer, wireless modem (modem), handheld, laptop computer, cordless phone ( Cordless phone) or wireless local loop (WLL) station, 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 terminals.

It should be noted that the number and types of terminals included in the communication system shown in FIG. 1 are only It is an example, and the embodiment of the present invention is not limited thereto.

In the communication system described in FIG. 1, the flow of data transmission using the HARQ transmission mechanism is as shown in FIG. 2. The information bit sequence is subjected to channel coding to generate a coded bit sequence, and the coded bit sequence is stored in the HARQ buffer; The transmission time is obtained according to a redundancy version (RV), and the coded bit sequence line rate matching is obtained from the HARQ buffer to obtain a physical channel bit sequence; the physical channel bit sequence is modulated to generate a physical channel symbol sequence; and the physical channel symbol sequence is obtained. The resource mapping is performed and mapped to the corresponding time-frequency resource for transmission.

Specifically, an embodiment of the present invention provides a data transmission method, which can be applied to a scenario in which a data transmission is performed by using a HARQ transmission mechanism. As shown in FIG. 3, the method may include:

S301. The first communications device sends the first data of the first data by using the first process on the m consecutive minimum scheduling time units.

Here, the minimum scheduling time unit can be understood as the smallest unit that implements scheduling in the time domain, and can be, for example, a transmission time interval (TTI). The first communication device sends data through the HARQ process. In the embodiment of the present invention, the initial data of the first data is sent by m consecutive minimum scheduling time units, where m is a positive integer, for example, may be 4. m may be a preset value, and the specific value of m is not limited in the embodiment of the present invention. In the timing diagram of the HARQ process shown in FIG. 4 or FIG. 5 or FIG. 6, the HARQ process number is 0-2, the minimum scheduling time unit is numbered from 1, and the minimum scheduling time unit indicated by the hatching indicates data transmission.

Indicates the initial data,

The data is retransmitted. The first process is the HARQ process 0. The minimum scheduled time unit numbered 1-4 is the initial data of the first data. 4 or FIG. 5 can be regarded as data transmission using a synchronous HARQ mechanism (hereinafter referred to as synchronous HARQ), and FIG. 6 can be regarded as data transmission using an asynchronous HARQ mechanism (hereinafter referred to as asynchronous HARQ). It can be understood that, under the synchronous HARQ mechanism, the timing relationship between the HARQ processes is fixed, and the first communication device or the second communication device can learn the currently used HARQ process according to the current time, and the HARQ process under the asynchronous HARQ mechanism. The timing relationship between processes is not fixed.

It can be understood that the initial data of the first data can be controlled by the RV, according to the RV Obtaining the initial data of the first data in the HARQ buffer of the first process for rate matching, obtaining a physical channel bit sequence, modulating the physical channel bit sequence into a physical channel symbol sequence, and then mapping the physical channel symbol sequence to the m minimum The time-frequency resource corresponding to the scheduling time unit is sent out.

S302. The second communication device receives the initial data of the first data and performs decoding, and sends a NACK and a retransmission resource indication.

Specifically, the second communication device performs decoding after receiving the initial transmission data of the first data, generates a positive acknowledgment information ACK if the decoding is successful, and generates a negative acknowledgment information NACK if the decoding fails. The above ACK or NACK is collectively referred to as reception confirmation information. The embodiment of the present invention mainly solves how to retransmit in the case of decoding failure. Therefore, after decoding, the second communication device feeds back NACK to the first communication device.

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

It can be understood that the NACK and the retransmission resource indication can be sent by one message or by different messages, for example, NACK feedback through an existing ACK/NACK signal format, through control information, such as downlink control information or uplink control. The information carries the retransmission resource indication; or may be extended based on the existing ACK/NACK signal format, so that the existing ACK/NACK signal can carry the retransmission resource indication. The embodiment of the present invention does not limit the specific message transmission and reception confirmation information and the retransmission resource indication.

It can be understood that in the subsequent process, the second communication device can also feed back NACK and retransmit resource indications in the same manner for retransmitting data. Receiving, by the second communication device, the NACK fed back after decoding the first data of the first data and the second communication device receiving the retransmission of the first data The NACK that is fed back after the data is decoded may be collectively referred to as the NACK of the first data, and the second communication device receives the retransmission resource indication fed back after the initial data of the first data is decoded, and the second communication device receives the first data. The retransmission resource indication fed back after the retransmission data is decoded may be collectively referred to as the retransmission resource indication of the first data.

It can be understood that the second communication device can determine n according to different factors or requirements, for example, can determine n according to the characteristics of the received signal, and the characteristics of the received signal can include the log likelihood ratio of the decoder output. The (LLR) distribution, or the difference between the CQI at the time of scheduling and the CQI of the received actual channel, is not limited in this embodiment of the present invention.

S303. The first communications 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 sent by the second communication device. The retransmitted data can be determined based at least on RV and n. It can be understood that the first communication device can directly use n to determine the retransmission data of the first data, or can obtain k based on the n transform, and finally use k to determine the retransmission data of the first data.

Specifically, the first communication device may be converted from n to k based on different factors, for example, according to the available resources of the cell, the number of user equipments participating in the scheduling in the cell, the historical retransmission correct rate, and the first data service type. At least one derives k from the n-transformation, wherein the historical one-time retransmission correct rate may be a ratio of a retransmission success in a previous period of time. For example, if the available resources in the cell are relatively rich, then more time resources than those indicated by n can be configured for retransmission, that is, an offset can be added on the basis of n to obtain k, thereby improving data transmission reliability. Sex, or if the history has a low retransmission rate, you can configure more time resources than n to retransmit.

The first communication device determines the retransmission data of the first data according to RV and n (or k), for example, as follows: RV and n (or k) are used as input of rate matching, and the actual retransmitted data symbols are generated and mapped to the retransmission Transfer in the resource. It is to be understood that, in some cases, in addition to RV and n (or k), other reference factors are used as input for rate matching, which is not limited by the embodiment of the present invention.

S304. The first communications device sends the retransmitted data of the first data by using 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 by using the first process.

Optionally, for the synchronous HARQ shown in FIG. 4 or FIG. 5, according to whether n is changed in S303, the manner in which the first communications apparatus transmits the retransmitted data of the first data by using the first process is different:

1. When the first communication device does not convert n

The first communication device transmits the retransmission data of the first data according to the n minimum scheduling time units. Specifically, when n=m, the first communication device transmits the retransmission data of the first data by using the first process on the n consecutive minimum scheduling time units; when n<m, the first communication device is in n consecutive The retransmission data of the first data is sent by the first process on the minimum scheduling time unit, and the mn consecutive minimum schedulings in the set of m consecutive minimum scheduling time units of the retransmission data of the first data is sent. Transmitting, by the second process, the second data by using the second process; or, when n>m, mapping the retransmission data of the first data to the n minimum scheduling time units according to the timing of the first process, wherein the n minimum scheduling time units distributed over _{G 1 = ceil (n / m} ) group of m consecutive minimum scheduling time unit, ceil rounding operation upward, and group G ₁ m consecutive minimum scheduling in On the _1st consecutive minimum scheduling time unit in the time unit, the second data is sent by the second process, where L ₁ =n mod m, mod is a modulo operation; or, when n>m, the first Communication device in m consecutive minimum scheduling time units A first data transmitting retransmission data by the first process, in this case, corresponds to retransmit the first data is aborted early. The above mentioned mn or mL ₁ consecutive minimum scheduling time units can be regarded as the remaining retransmission resources of the first process.

The second process described above is an adjacent process of the first process. The so-called adjacent processes are adjacent in time series. In the example of FIG. 4, there are three HARQ processes. If the first process is HARQ process 0, the adjacent process of the HARQ process 0 may be HARQ process 1 or HARQ process 2 Assuming that the first process is HARQ process 1, the neighbor process of HARQ process 1 may be HARQ process 0 or HARQ process 2. The mL ₁ consecutive minimum scheduling time unit in the m consecutive minimum scheduling time units of the G ₁ group may be used for the initial transmission of the second data or for the retransmission of the second data.

Taking FIG. 4 as an example, assuming that the first process is HARQ process 0, m=4, n=2, then the remaining 2 minimum schedulings of the 4 consecutive minimum scheduling time units of the retransmission data of the first data are transmitted. The time unit can be used by the HARQ process 2. In order to ensure continuity in timing, in addition to the minimum scheduling time unit allocated to the HARQ process 2 itself, the HARQ process 2 uses the first 2 of the set of 4 consecutive minimum scheduling time units that transmit the retransmission data of the first data. The minimum scheduling time unit, that is, the minimum scheduling time unit numbered 13 and 14, and the HARQ process 0 uses the last two minimum scheduling time units, that is, the minimum scheduling time units numbered 13 and 14.

Taking FIG. 5 as an example, assuming that the first process is HARQ process 0, m=4, n=7, then G ₁ =2, mL ₁ =1, that is, the first communication device can retransmit the first data. Data is mapped to 7 minimum scheduling time units according to the timing of the first process, and 2 sets of 4 consecutive minimum scheduling time units, and the remaining 1 of the 2 consecutive minimum scheduling time units of the 2nd group The minimum scheduling time unit can be used by the HARQ process 1. In order to ensure continuity in timing, in addition to the minimum scheduling time unit allocated to the HARQ process 1 itself, the HARQ process 1 uses the last minimum scheduling time unit of the first process, that is, the minimum scheduling time unit numbered 28, and HARQ Process 0 uses the first three minimum scheduling time units, the minimum scheduling time unit numbered 25-27.

Optionally, the sending, by the first process, the retransmission data of the first data may further include: the first communications device notifying at least one of the n and the RV to the second communications device, that is, the sending may indicate that n The information of at least one of the RV and the RV is given to the second communication device, thereby making the system more robust. The first communication device notifying the second communication device of the at least one of the n and the RV may be performed simultaneously with transmitting the retransmission data of the first data, or may be performed before transmitting the retransmission data of the first data.

2. When the first communication device converts n to k

The first communication device transmits the retransmission data of the first data according to the k minimum scheduling time units. Specifically, when k<m, transmitting the retransmission data of the first data according to the k minimum scheduling time units includes: transmitting retransmission data of the first data by using the first process on the k consecutive minimum scheduling time units And transmitting, by the second process, the second data on the set of m consecutive s consecutive minimum scheduling time units of the retransmitted data transmitting the first data; or, when k>m, The retransmission data of the first data is mapped to k minimum scheduling time units according to the timing of the first process, wherein the k minimum scheduling time units are distributed in the G ₂ =ceil(k/m) group m consecutive the minimum scheduling time unit, ceil on ₂ consecutive minimum scheduling time unit, the second data transmission is a ceil operation, as well mL in group G ₂ m consecutive minimum scheduling time unit by the second process, The second process is an adjacent process of the first process, L ₂ =k mod m, mod is a modulo operation; or, when k>m, the first communication device is minimized in m consecutive Sending the first number through the first process on the scheduling time unit The retransmitted data, in this case, corresponds to the first data retransmission is suspended in advance. The above mentioned mk or mL ₂ consecutive minimum scheduling time units can be regarded as the remaining retransmission resources of the first process.

The foregoing process is also an adjacent process of the first process. For the description of the second process and the first process, reference may be made to the description of the foregoing embodiment, and details are not described herein again. It can be understood that the first communication device transmits the retransmission data of the first data according to the k minimum scheduling time units and the process of transmitting the retransmission data of the first data according to the n minimum scheduling time units.

The second process may be a prior process of the first process or a subsequent process of the first process. Further, in order to ensure continuity in timing, when the second process is a prior process of the first process, the second process may be The remaining retransmission resources of the first process are arranged in front of the m consecutive minimum scheduling time units in which the remaining retransmission resources are located, as shown in FIG. 4, when the second process is the subsequent process of the first process, The remaining retransmission resources of the first process may be arranged after the m consecutive minimum scheduling time units in which the remaining retransmission resources are located, as shown in FIG. 5.

Optionally, the sending, by the first process, the retransmission data of the first data by using the first process may further include: sending information indicating the 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 sends a finger The information indicating k and/or RV may be performed to the second communication device simultaneously with the retransmission data of the first data, or may be performed before the retransmission data of the first data is transmitted.

In the above synchronous HARQ, by designing the HARQ process and related timing, the retransmission resources (remaining retransmission resources) saved in one process are shared with the initial data of other processes or retransmitted data, so that the HARQ process can be fully utilized. Time domain resources transmit useful data, which is beneficial to improve the reachability rate and avoid conflicts between different packets and feedback.

Optionally, for the case of n>m or k>m, the second communication device may decode the data of a set of m consecutive minimum scheduling time units or may wait for n or k consecutive minimums. The data of the scheduling time unit is collected and re-decoded, which is not limited by the embodiment of the present invention.

Optionally, for the synchronous HARQ, it may be determined, according to a preset rule, which process the retransmission resource saved by the first process is used, and the predetermined rule may be, for example, a retransmission resource that preferentially saves the first process. It is shared with the HARQ process with the newly transmitted data and is preferentially shared to the prior process; optionally, if the adjacent processes of the first process are all retransmitted data, more resources are needed according to the retransmission needs of the adjacent processes. The process is used, if the neighboring process does not need the remaining retransmission resources of the first process, it is used as a retransmission of the first process itself. For example, suppose there are three processes, namely, HARQ process 0-2, the first process is HARQ process 1, HARQ process 0 and HARQ process 2 are adjacent processes of HARQ process 1, and if HARQ process 2 is new data, HARQ process 0 In order to retransmit the data, the retransmission resources saved by the HARQ process 1 are used by the HARQ process 2. If the HARQ processes 0 and 2 are both newly transmitted data, the retransmission resources saved by the HARQ process 1 are used by the HARQ process 0, if The HARQ processes 0 and 2 are both retransmitted data, and the HARQ process 2 retransmission needs to be greater than m consecutive minimum scheduling time units, and the retransmission resources saved by the HARQ process 1 are used by the HARQ process 2, if the HARQ processes 0 and 2 The data is retransmitted, but if the

HARQ process

0 and 2 retransmission do not need to be greater than m consecutive minimum scheduling time units, the retransmission resources saved by the HARQ process 1 are left to continue to retransmit themselves.

In addition, after the first communication device determines which process the retransmission resource saved by the first process is used, the determined process of retransmitting the resource saved by using the first process is the second process. If the second process uses the retransmission resource saved by the first process to perform data transmission, the resource information used by the second process may be further notified to the second communication device, thereby making the system more robust.

In addition, for the asynchronous HARQ, sending the initial data of the first data or retransmitting the data by using the first process may further include: sending information indicating a process number of the first process to the second communication device, where the present invention is The embodiment does not limit the manner in which the first communication device sends the process number information. It can be understood that, for the asynchronous HARQ, the retransmission data of the first data is sent by the first process, corresponding to the case that the first communication device does not perform the conversion of the n, and the method further includes: transmitting at least one of the n and the RV. One, similarly, the first communication device transmitting at least one of the n and the RV to the second communication device may be performed simultaneously with the retransmission data of the first data, or may be retransmitting the first data. The data is performed before; corresponding to the case where the first communication device converts n to k, sending the retransmission data of the first data by using the first process may further include: transmitting at least one of k and RV, similar And transmitting, by the first communication device, at least one of k and RV to the second communication device may be performed simultaneously with transmitting the retransmission data of the first data, or before transmitting the retransmission data of the first data.

Optionally, in the data transmission method provided by the embodiment of the present invention, the first communication device sends the initial data of the first data by using the first process on the m consecutive minimum scheduling time units, whether for synchronous HARQ or asynchronous HARQ. It may also include transmitting at least one of m, RV to the second communication device. Similarly, the first communication device transmitting at least one of m and RV to the second communication device may be performed simultaneously with the initial transmission of the first data, or before transmitting the initial data of the first data. get on. Optionally, in order to increase the coding gain in a narrowband scenario, m is variable.

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

It should be noted that the timing diagram of the HARQ process shown in FIG. 4-6 is described by taking three processes as an example, and the data transmission method under other processes is similar to the embodiment of the present invention.

S305. The second communication device receives the retransmission data that the first communication device sends the first data by using the first process.

After the first communication device transmits the retransmission data of the first data through the first process in the manner described in S304, the second communication device performs reception and decoding, and transmits the reception confirmation information and the retransmission resource indication.

The data transmission method provided by the embodiment of the present invention improves the rate of data transmission by using the HARQ transmission mechanism by retransmission on demand, thereby achieving a relative balance between 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 device of the transmitting end and a device of the receiving end that perform data transmission in a wireless manner. The first communication device and the second communication device may be any device having a wireless transceiving function, including but not limited to: a base station, an access node in a WiFi system, a wireless relay node, a wireless backhaul node, and a terminal, etc. It can communicate with one or more core networks via a radio access network (RAN), or can communicate directly with other terminals.

It should be noted that the data transmission method provided by the embodiment of the present invention can be applied to downlink data transmission, and can also be applied to uplink data transmission, and can also be applied 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 the first terminal, and the corresponding second communication device is the second terminal. The embodiment of the present invention does not limit the application scenario.

In the embodiment provided by the present invention, the data transmission method provided by the embodiment of the present invention is introduced from the perspective of the interaction between the network elements and the network elements. It can be understood that each network element, such as a terminal, a base station, etc., in order to implement the above functions, includes hardware structures and/or software modules corresponding to each function. Those skilled in the art will readily recognize the present invention in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. It can be implemented in hardware or a combination of hardware and computer software. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

FIG. 7 is a schematic structural diagram of a possible communication apparatus according to an embodiment of the present invention. The communication device can implement the functions of the first communication device in the above embodiment of the data transmission method, and thus can also realize the beneficial effects of the above data transmission method. The communication device includes a processor 701 and a transceiver 702.

The transceiver 702 is configured to send, by using a first process, initial transmission data of the first data, and receive negative confirmation information of the first data, on the m consecutive minimum scheduling time units.

(NACK) and a retransmission resource indication, the retransmission resource indication includes information indicating n, and n is used to determine a number of minimum scheduling time units required to transmit retransmission data of the first data, where m and n Is a positive integer;

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 send, by the first process, retransmission of the first data determined by the processor 701. data.

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

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

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

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

The communication device provided by the embodiment of the present invention improves the adoption of HARQ transmission by retransmitting on demand. The mechanism performs the rate of data transmission, so that the relative balance between transmission rate, transmission delay and transmission reliability can be achieved. Further, the retransmission resources (remaining retransmission resources) saved in one process are shared with the initial data of other processes or retransmitted data, so that the time domain resources can be fully utilized to transmit useful data, which is beneficial to improve the reachability. Rate and avoid conflicts between different packets and retransmissions.

It will be understood that Figure 7 only shows one design of the communication device. In practical applications, the communication device can include any number of processors and transceivers, and all communication devices that can implement embodiments of the present invention are within the scope of the present invention.

FIG. 8 is a schematic structural diagram of another communication apparatus according to an embodiment of the present invention. The communication device realizes the functions of the first communication device in the above-described embodiment of the data transmission method, and thus can also realize the advantageous effects of the above data transmission method. The communication device includes a processing unit 801 and a transceiver 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.

The communication device of the embodiment shown in FIG. 7 and FIG. 8 above may be a UE, a base station, or another device that uses HARQ technology for data communication.

FIG. 9 is a schematic structural diagram of a possible communication apparatus according to an embodiment of the present invention. The communication device can implement the functions of the second communication device in the embodiment of the data transmission method described above, and thus can also achieve the beneficial effects of the above data transmission method. The communication device includes a receiver 901 and a transmitter 902.

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

The transmitter 902 is configured to send a NACK and a retransmission resource indication of the first data, where the retransmission resource indication includes information indicating n, and n is used to determine a retransmission data required to transmit the first data. The number of minimum scheduling time units;

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

For a specific implementation of the receiver 901, refer to the related description in the method embodiment.

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

The communication device provided by the embodiment of the present invention improves the rate of data transmission by using the HARQ transmission mechanism by retransmission on demand, thereby achieving a relative balance between the transmission rate, the transmission delay, and the transmission reliability. Further, the retransmission resources (remaining retransmission resources) saved in one process are shared with the initial data of other processes or retransmitted data, so that the time domain resources can be fully utilized to transmit useful data, which is beneficial to improve the reachability. Rate and avoid conflicts between different packets and retransmissions.

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

FIG. 10 is a schematic structural diagram of another communication apparatus according to an embodiment of the present invention. The communication device realizes the functions of the second communication device in the above embodiment of the data transmission method, and thus can also realize the advantageous effects of the above data transmission method. The communication device includes a receiving unit 1001 and a transmitting unit 1002. The receiving unit 1001 implements the corresponding function in the receiver 901, and the sending unit 1002 implements the corresponding function in the transmitter 902.

The communication device of the embodiment shown in FIG. 9 and FIG. 10 above may be a UE, a base station, or another device that uses HARQ technology for data communication.

Further, FIG. 11 shows a possible structural diagram of a base station involved in the foregoing embodiment.

The base station shown includes a transceiver 1102 and a controller/processor 1104. The transceiver 1102 can be configured to support sending and receiving information between the base station and the terminal in the foregoing embodiment, and supporting the terminal. Radio communication with other terminals. The controller/processor 1104 can be used to perform various functions for communicating with a terminal or other network device. On the uplink, the uplink signal from the terminal is received via the antenna, coordinated by the transceiver 1102, and further processed by the controller/processor 1104 to recover the service data and signaling information transmitted by the terminal. On the downlink, traffic data and signaling messages are processed by controller/processor 1104 and mediated by transceiver 1102 to generate downlink signals for transmission to the terminal via the antenna. The transceiver 1102 is also operative to perform a data transmission method as described in the above embodiments, for example, the transceiver includes a transmitter and a receiver. In the scenario of downlink data transmission, the transceiver is configured to perform the functions of the first data transmission device in the embodiment corresponding to Figures 3-6. In the scenario of uplink data transmission, the transceiver is configured to perform the functions of the second data transmission device in the corresponding embodiment of Figures 3-6. The controller/processor 1104 can also be used to perform the processes involved in the base station of Figures 3-6 and/or other processes for the techniques described herein. The base station can also include a memory 1106 that can be used to store program codes and data for the base station. The base station may further include a communication unit 1108 for supporting the base station to communicate with other network entities. It will be appreciated that Figure 11 only shows a simplified design of the base station. In practical applications, the base station may include 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 one possible design structure of the terminal involved in the above embodiment. The terminal includes a transceiver 1204, a controller/processor 1206, and may also include a memory 1208 and a modem processor 1202.

Transceiver 1204 conditions (e.g., analog conversion, filtering, amplifying, upconverting, etc.) the output samples and generates an uplink signal that is transmitted via an antenna to the base station described in the above embodiments. On the downlink, the antenna receives the downlink signal transmitted by the base station in the above embodiment. Transceiver 1204 conditions (eg, filters, amplifies, downconverts, digitizes, etc.) the signals received from the antenna and provides input samples. In the modem processor 1202, the encoder 1212 receives the traffic data and signaling messages to be transmitted on the uplink, and the service data and signaling messages. Processing (eg, formatting, encoding, and interleaving). Modulator 1214 further processes (e.g., symbol maps and modulates) the encoded traffic data and signaling messages and provides output samples. Demodulator 1218 processes (e.g., demodulates) the input samples and provides symbol estimates. The decoder 1212 processes (e.g., deinterleaves and decodes) the symbol estimate and provides decoded data and signaling messages that are sent to the terminal. Encoder 1212, modulator 1214, demodulator 1218, and decoder 1216 may be implemented by a composite modem processor 1202. These units are processed according to the radio access technology employed by the radio access network (e.g., access technologies of LTE and other evolved systems). The controller/processor 1206 controls and manages the actions of the terminal for performing the processing performed by the terminal in the above embodiment. For example, transceiver 1204 includes a transmitter and a receiver. In the scenario of downlink data transmission, the transmitter and receiver are configured to perform the functions of the second data transmission device in the corresponding embodiment of Figures 2-6. In the scenario of uplink data transmission, the transmitter and receiver are configured to perform the functions of the first data transmission device in the corresponding embodiment of Figures 3-6. In the scenario of D2D data transmission, the terminal at the transmitting end is configured to perform the function of the first data transmission device in the corresponding embodiment of FIG. 3 to FIG. 6, and the terminal at the receiving end is configured to execute the corresponding embodiment in FIG. 3 to FIG. The function of the second data transmission device. The controller/processor 1206 can also be used to perform the processes involved in the terminal of FIGS. 2-6 and/or other processes for the techniques described herein. Memory 1208 is for storing program code and data for the terminal.

The controller/processor for performing the base station, UE, base station or control node in the above embodiments may be a central processing unit (CPU), a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), and a field. Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.

It should be noted that the data transmission method and the communication device provided by the foregoing embodiments of the present invention can be applied to any scenario with data transmission, and is not limited to having a higher transmission rate requirement and transmission. A service that delivers latency requirements and transmission reliability requirements.

The steps of a method or algorithm described in connection with the present disclosure may be implemented in a hardware, or may be implemented by a processor executing software instructions. The software instructions may be comprised of corresponding software modules that may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable hard disk, CD-ROM, or any other form of storage well known in the art. In the medium. An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in the terminal. Of course, the processor and the storage medium can also exist as discrete components in the terminal.

Those skilled in the art will appreciate that in one or more examples described above, the functions described herein can be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored in a computer readable medium or transmitted 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 location to another. A storage medium may be any available media that can be accessed by a general purpose or special purpose computer.

The specific embodiments of the present invention have been described in detail with reference to the preferred embodiments of the present invention. The scope of the protection, any modifications, equivalent substitutions, improvements, etc., which are made on the basis of the technical solutions of the present invention, are included in the scope of the present invention.

Claims

A data transmission method, comprising:

Transmitting, by the first process, initial transmission data of the first data, where the m is a positive integer;

Receiving a negative acknowledgement information (NACK) of the first data and a retransmission resource indication, wherein the retransmission resource indication includes information indicating n, and n is used to determine a retransmission data required to transmit the first data The number of minimum scheduling time units, where n is a positive integer;

Determining retransmission data of the first data according to a redundancy version (RV) and n;

Transmitting the determined retransmission data of the first data by the first process.
The method according to claim 1, wherein the transmitting the retransmission data of the first data by using a first process comprises: transmitting retransmission data of the first data according to n minimum scheduling time units.
The method according to claim 2, wherein when n < m, the retransmitting data of the first data according to the n minimum scheduling time units comprises:

Transmitting retransmission data of the first data by using the first process on the n consecutive minimum scheduling time units;

And transmitting, by the second process, the second data, on the mn consecutive minimum scheduling time units of the set of m consecutive minimum scheduling time units that transmit the retransmission data of the first data, where the The second process is an adjacent process of the first process.
The method according to claim 2, wherein when n>m, the retransmitting data of the first data according to the n minimum scheduling time units comprises:

And retransmitting the retransmission data of the first data to the n minimum scheduling time units according to the timing of the first process, where the n minimum scheduling time units are distributed in the G 1 =ceil(n/m) group m On a continuous minimum scheduling time unit, where ceil is an up-rounding operation;

ML in the first group G 1 m consecutive minimum scheduling time unit a consecutive minimum scheduling time unit, transmits the second data through a second process, wherein the second process is a process of the first phase Neighbor process, L 1 =n mod m, mod is a modulo operation.
The method according to any one of claims 2 to 4, wherein the transmitting the retransmission data of the first data by the first process further comprises: transmitting at least one of indicating n and RV information.
The method according to claim 1, wherein the determining the retransmission data of the first data according to RV and n comprises: determining retransmission data of the first data according to RV and k; Transmitting the retransmission data of the first data includes: transmitting retransmission data of the first data according to k minimum scheduling time units, wherein the k is obtained based on an n-transform.
The method according to claim 6, wherein when k < m, the retransmitting data of the first data according to the k minimum scheduling time units comprises:

Transmitting retransmission data of the first data through the first process on the k consecutive minimum scheduling time units, and mk in the set of m consecutive minimum scheduling time units transmitting the retransmission data of the first data On the consecutive minimum scheduling time units, the second data is sent by the second process, where the second process is an adjacent process of the first process.
The method according to claim 6, wherein when k>m, the retransmitting data of the first data according to the k minimum scheduling time units comprises:

And retransmitting the retransmission data of the first data to the k minimum scheduling time units according to the timing of the first process, where the k minimum scheduling time units are distributed in the G 2 =ceil(k/m) group m On a continuous minimum scheduling time unit, ceil is an up-rounding operation;

as well as

ML in the second group G 2 m consecutive minimum scheduling time unit of two consecutive minimum scheduling time unit, transmits the second data through a second process, wherein the second process is a process of the first phase Neighbor process, L 2 = k mod m, mod is a modulo operation.
The method according to any one of claims 6-8, wherein the transmitting the retransmission data of the first data by the first process further comprises: transmitting information indicating k.
The method according to any one of claims 1 to 9, wherein the transmitting the initial data of the first data by the first process further comprises: transmitting information indicating a process number of the first process; The transmitting the retransmission data of the first data by using the first process, further includes: sending information indicating a process number of the first process.
A data transmission method, comprising:

Receiving initial data of the first data, where the initial data of the first data is data sent by the first process on m consecutive minimum scheduling time units, where the m is a positive integer;

Sending a NACK and a retransmission resource indication of the first data, where the retransmission resource indication includes information indicating n, and n is used to determine a minimum scheduling time unit required to transmit retransmission data of the first data Number

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 method according to claim 11, wherein the receiving the retransmission data of the first data comprises:

Receiving retransmission data of the first data transmitted by the first process on n consecutive minimum scheduling time units;

Receiving, by the mn consecutive minimum scheduling time units of the set of m consecutive minimum scheduling time units of the retransmission data of the first data, receiving second data sent by the second process, where the The second process is an adjacent process of the first process, n<m.
The method according to claim 11, wherein the receiving the retransmission data of the first data comprises:

Receiving retransmission data of the first data, where the retransmission data of the first data is mapped to n minimum scheduling time units according to a timing of the first process, where n minimum scheduling times The cells are distributed over m consecutive minimum scheduling time units of G 1 =ceil(n/m) groups, where ceil is an up-rounding operation;

Receiving a second data transmitted by a second process, wherein the second data mL in Group G 1 m consecutive minimum scheduling time unit a consecutive minimum scheduling time unit, the second process is the The adjacent process of the first process, L 1 =n mod m, mod is a modulo operation, n>m.
The method of claim 12 or 13, further comprising receiving information indicative of at least one of n and RV.
The method according to claim 11, wherein the receiving the retransmission data of the first data comprises:

Receiving retransmission data of the first data transmitted by the first process on the k consecutive minimum scheduling time units;

Receiving, by the mk consecutive minimum scheduling time units of the set of m consecutive minimum scheduling time units of the retransmission data of the first data, receiving second data sent by the second process, where The second process is the adjacent process of the first process, k < m, and the k is obtained based on the n transform.
The method according to claim 11, wherein the receiving the retransmission data of the first data comprises:

Receiving retransmission data of the first data, where the retransmission data of the first data is mapped to k minimum scheduling time units according to a timing of the first process, where n minimum scheduling times The cells are distributed over m consecutive minimum scheduling time units of the G 2 =ceil(k/m) group, wherein ceil is an up rounding operation;

Receiving a second data transmitted by a second process, wherein said second data on m consecutive minimum scheduling time unit group G 2 2 mL consecutive minimum scheduling time unit, the second process is the The adjacent process of the first process, L 2 = k mod m, mod is a modulo operation, k > m, and the k is obtained based on the n transform.
The method according to claim 15 or 16, wherein the method further comprises: receiving information indicating k.
The method according to any one of claims 11-17, wherein the receiving the initial data of the first data further comprises: receiving information indicating a process number of the first process;

Receiving the retransmission data of the first data, further comprising: receiving information indicating a process number of the first process.
A communication device, comprising: a transceiver and a processor;

The transceiver is configured to send, by using a first process, initial transmission data of the first data, and receive negative acknowledgement information (NACK) of the first data, and a retransmission resource indication, on the m consecutive minimum scheduling time units. The retransmission resource indication includes information indicating n, and n is used to determine a number of minimum scheduling time units required to transmit retransmission data of the first data, where 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, by the first process, the first data determined by the processor Retransmit the data.
The apparatus according to claim 19, wherein the transceiver is specifically configured to transmit the retransmission data of the first data by the first process according to the method of any one of claims 2-4.
The apparatus of claim 20 wherein said transceiver is further operative to transmit information indicative of at least one of n and RV.
The apparatus according to claim 19, wherein the processor is specifically configured to determine retransmission data of the first data according to RV and k, wherein the k is obtained based on an n-transform.
The apparatus according to claim 22, wherein the transceiver is specifically configured to transmit the retransmission data of the first data by using a first process according to the method of claim 7 or 8.
The apparatus according to claim 22 or 23, wherein said transceiver is further configured to transmit information indicative of k.
The apparatus according to any one of claims 19 to 24, wherein the transceiver is further configured to send information indicating a process number of the first process.
A communication device, comprising: a receiver and a transmitter;

The receiver is configured to receive initial data of the first data, where the initial data of the first data is data sent by the first process on the m consecutive minimum scheduling time units, where the m Is a positive integer;

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

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.
The device of claim 26, wherein the receiver is further for performing the method of any of claims 12-18.