CN108270525B

CN108270525B - Redundancy version transmission method and equipment

Info

Publication number: CN108270525B
Application number: CN201611264649.XA
Authority: CN
Inventors: 张长; 赵毅男
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-12-30
Filing date: 2016-12-30
Publication date: 2021-02-12
Anticipated expiration: 2036-12-30
Also published as: CN108270525A

Abstract

The embodiment of the application provides a redundancy version transmission method and equipment, wherein a sending end device generates a first RV based on a data bit to be transmitted and sends the first RV to a receiving end device, if the receiving end device fails to correctly decode part or all of the data bit to be transmitted based on the first RV, the receiving end device sends feedback information to the sending end device, and the sending end device generates a second RV according to the feedback information. In the process, after retransmission every time, if the receiving end equipment does not correctly decode part or all of the data bits to be transmitted, the sending end equipment transmits the RV according to the feedback information sent by the receiving end equipment, the initial position and the length of the RV can be adaptively adjusted according to the feedback information, and resource waste caused by sending the RV with a fixed length is avoided.

Description

Redundancy version transmission method and equipment

Technical Field

The present disclosure relates to communications technologies, and in particular, to a method and device for transmitting redundancy versions.

Background

In wireless communication systems, to ensure spectrum efficiency, link adaptation techniques are generally used, for example, link adaptation techniques are used in wireless communication systems such as Long Term Evolution (LTE) system and the fifth Generation (5G) being standardized. In the link adaptive technology, a higher operating point is generally adopted to obtain a gain in spectrum efficiency, that is, an Information Block Error Rate (iBLER) is higher, for example, up to about 10% when a transmitting end device communicates with a receiving end device. Higher ibbler results in more retransmissions, for which the wireless communication system performs retransmissions in conjunction with an Incremental Redundancy (IR) Hybrid Automatic Retransmission Request (HARQ) mechanism.

Under the existing IR HARQ mechanism, different Channel Quality Information (CQI) correspond to different Modulation and Coding Schemes (MCS), different MCSs correspond to bit sequences with different lengths, and a plurality of bit sequences with the same length and different start positions corresponding to the same MCS are different Redundancy Versions (RV). The length of the bit sequence may be referred to as RV granularity. In the communication process, the sending end device selects a corresponding MCS based on the initial channel state information, generates a plurality of bit sequences with the same length and different initial positions, namely a plurality of RVs, in a circular buffer according to the MCS, selects an initial RV (subsequently called as RV0) from the RVs, and selects the RV from the circular buffer for retransmission each time of retransmission.

Under the IR HARQ mechanism, when a CQI measurement error or a delay factor causes an expired reported CQI, the CQI in actual transmission is not consistent with the CQI used for selecting the MCS, which results in selection of an unsuitable MCS, and further results in inaccuracy of the bit stream length of RV0 obtained according to the MCS, and a retransmission granularity, that is, the length of RV 0. When the length of RV0 is large, each transmission, including the first transmission and each subsequent retransmission, occupies more resources, resulting in resource waste.

Disclosure of Invention

The embodiment of the application provides a method and equipment for transmitting a redundancy version, which are used for generating the redundancy version according to feedback information of receiving end equipment and avoiding resource waste.

In a first aspect, an embodiment of the present application provides a redundancy version transmission method, which is described from the perspective of a sending end device, and the method includes: the method comprises the steps that a sending end device generates a first RV based on data bits to be transmitted and sends the first RV to a receiving end device, if the receiving end device cannot correctly decode part or all of the data bits to be transmitted based on the first RV, the receiving end device sends feedback information to the sending end device, and the sending end device generates a second RV according to the feedback information.

In the method, after each retransmission, if the receiving end equipment does not correctly decode part or all of the data bits to be transmitted, the sending end equipment transmits the RV according to the feedback information sent by the receiving end equipment, and the initial position and the length of the RV can be adaptively adjusted according to the feedback information, so that the resource waste caused by sending the RV with a fixed length is avoided.

In one possible implementation, the second RV is generated based on the data bits to be transmitted.

In a possible implementation manner, when the first redundancy version is a redundancy version of initial transmission, the second redundancy version is a redundancy version of first retransmission; or, when the first redundancy version is a retransmitted redundancy version, the first redundancy version and the second redundancy version are redundancy versions transmitted successively when the sending-end device retransmits the redundancy versions twice.

In the method, the first RV and the second RV are RVs transmitted successively when the sending end device transmits the RVs twice, so that the receiving end device does not correctly decode part or all of the bits of the data to be transmitted each time, and then the sending end device generates the redundancy version according to the feedback information sent by the receiving end device, thereby avoiding resource waste.

In one possible implementation, the feedback information indicating a start position of the second RV includes: the feedback information indicates a relationship between a starting position of the second RV and an ending position of the first RV, and the sending end device sends the second RV according to the feedback information, including: and the sending end equipment determines the initial position of the second RV according to the relation and sends the second RV according to the initial position.

In the method, the receiving end sets the starting position of the second RV to the sending end according to the relation between the starting position of the second RV and the ending position of the first RV, and the length of the RV retransmitted each time is prevented from being fixed.

In a possible implementation manner, when the sending end device sends the first RV, a first modulation and coding scheme MCS is selected, and the feedback information indicates a start position of a second RV, where the feedback information includes: the feedback information indicates a difference of an index of the first MCS and an index of a second MCS;

the sending end device sending the second RV according to the feedback information includes:

and the sending end equipment determines the length of the second RV according to the difference value of the index of the first MCS and the index of the second MCS, and sends the second RV according to the length.

In the method, the receiving end sets the length of the second RV to the sending end according to the difference value of the MCS indexes, so that the sending end equipment determines the length of the RV retransmitted this time according to the length, and the length of the RV retransmitted every time is prevented from being fixed.

In a possible implementation manner, the selecting, by the sending end device, a first MCS when sending the first RV, where the first MCS is determined based on a first CQI, and the indicating, by the feedback information, a start position of a second RV includes: the feedback information indicates a difference value of an index of the first CQI and an index of a second CQI;

and the sending end equipment determines the length of the second RV according to the difference value of the index of the first CQI and the index of the second CQI and sends the second RV according to the length.

In the method, the RV is dynamically generated, the RV granularity is flexibly changed, and the resource waste caused by the inconsistency of the CQI during actual transmission and the CQI according to the MCS selection is avoided.

In a second aspect, an embodiment of the present application provides a redundancy version generation method, which is described from the perspective of a receiving end device, and the method includes: receiving a first Redundancy Version (RV) sent by sending end equipment, wherein the first RV is generated by the sending end equipment based on data bits to be transmitted; if the receiving end device does not correctly decode part or all of the data bits to be transmitted based on the first RV, sending feedback information to the sending end device, wherein the feedback information is used for indicating at least one of the starting position of a second RV and the length of the second RV.

In the method, after each retransmission, if the receiving end equipment does not correctly decode part or all of the data bits to be transmitted, the feedback information is sent to the sending end equipment, so that the sending end equipment can generate the redundancy version according to the feedback information, and the waste of resources is avoided.

In one possible implementation, the feedback information indicating a start position of the second RV includes: the feedback information indicates a relationship of a starting position of the second RV and an ending position of the first RV.

In a possible implementation manner, the first modulation and coding scheme MCS is a MCS selected when the transmitting end device transmits the first RV,

the receiving end equipment selects a second MCS and sends the feedback information, and the feedback information indicates the starting position of a second RV and comprises the following steps: the feedback information indicates a difference of an index of the first MCS and an index of a second MCS.

In one possible implementation, the first modulation and coding scheme MCS is a MCS selected when the transmitting end device transmits a first RV, the first MCS is determined based on a first CQI,

the receiving end device determines a second CQI and sends feedback information, where the feedback information indicates a starting position of a second RV, and the feedback information includes: the feedback information indicates a difference value of an index of the first CQI and an index of the second CQI.

In a third aspect, an embodiment of the present application provides a sending-end device, including:

the system comprises a transceiver and a receiving end device, wherein the transceiver is used for sending a first Redundancy Version (RV) to the receiving end device, and the first RV is generated based on data bits to be transmitted;

if the receiving end device does not correctly decode part or all of the data bits to be transmitted based on the first RV, the transceiver is further configured to receive feedback information sent by the receiving end device, where the feedback information is used to indicate at least one of an initial position of a second RV and a length of the second RV;

the transceiver is further configured to send the second RV to the receiving end device.

In one possible implementation, the feedback information indicating a start position of the second RV includes: the feedback information indicates a relationship of a start position of the second RV to an end position of the first RV,

the processor is configured to determine a starting position of the second RV according to the relationship;

the transceiver is configured to send the second RV according to the starting position.

In a possible implementation manner, the processor selects a first modulation and coding scheme MCS when determining the first RV, and the feedback information indicates a starting position of a second RV includes: the feedback information indicates a difference of an index of the first MCS and an index of a second MCS;

the processor is configured to determine a length of the second RV according to a difference between an index of the first MCS and an index of the second MCS;

the transceiver is configured to send a second RV according to the length.

In one possible implementation, the processor is configured to select a first MCS when the transceiver transmits the first RV, the first MCS being determined based on a first CQI, and the feedback information indicating a starting position of a second RV includes: the feedback information indicates a difference value of an index of the first CQI and an index of a second CQI;

the processor is configured to determine a length of the second RV according to a difference between an index of the first CQI and an index of the second CQI;

the transceiver is configured to send a second RV according to the length.

In a fourth aspect, an embodiment of the present application provides a receiving end device, including:

the transceiver is configured to receive a first Redundancy Version (RV) from a sending end device, where the first RV is generated by the sending end device based on a data bit to be transmitted;

if the receiving end device does not correctly decode part or all of the data bits to be transmitted based on the first RV, the transceiver is configured to send feedback information to the sending end device, where the feedback information is used to indicate at least one of a start position of a second RV and a length of the second RV.

In a possible implementation manner, the receiving end device further includes: a processor, wherein the first modulation and coding scheme MCS is a MCS selected when the sending end equipment sends a first RV,

the processor is configured to select a second MCS;

the transceiver is configured to send the feedback information, where the feedback information indicates a starting position of a second RV and includes: the feedback information indicates a difference of an index of the first MCS and an index of a second MCS.

In a possible implementation manner, the receiving end device further includes a processor, the first modulation and coding scheme MCS is a MCS selected when the transmitting end device transmits a first RV, the first MCS is determined based on a first CQI,

the processor is configured to determine a second CQI;

the transceiver is configured to send the feedback information, where the feedback information indicates a starting position of a second RV and includes: the feedback information is used to indicate a difference between an index of the first CQI and an index of the second CQI.

In a fifth aspect, an embodiment of the present application provides a sending-end device, including:

a sending module, configured to send a first redundancy version RV to a receiving end device, where the first RV is generated based on a data bit to be transmitted;

a receiving module, configured to receive feedback information sent by the receiving end device if the receiving end device incorrectly decodes part or all of the data bits to be transmitted based on the first RV, where the feedback information is used to indicate at least one of an initial position of a second RV and a length of the second RV;

the sending module is further configured to send the second RV according to the feedback information.

The sending end device is configured to implement the first aspect or any possible implementation manner of the first aspect, and is applied to each step of the sending end device.

In a sixth aspect, an embodiment of the present application provides a receiving end device, including:

a receiving module, configured to receive a first redundancy version RV sent by a sending end device, where the first RV is generated by the sending end device based on a data bit to be transmitted;

a sending module, configured to send feedback information if the receiving end device incorrectly decodes part or all of the data bits to be transmitted based on the first RV, where the feedback information is used to indicate at least one of an initial position of a second RV and a length of the second RV.

The receiving end device is used to implement the second aspect or any possible implementation manner of the second aspect, and is applied to each step of the receiving end device.

In a seventh aspect, an embodiment of the present application provides a sending end device, including: the device comprises a processor, a memory, a communication interface and a system bus, wherein the memory and the communication interface are connected with the processor through the system bus and complete mutual communication, the memory is used for storing computer execution instructions, the communication interface is used for communicating with other devices, and the processor is used for operating the computer execution instructions to enable the sending-end device to execute the steps of any one of the possible implementation manners of the first aspect or the first aspect.

In an eighth aspect, an embodiment of the present application provides a receiving end device, including: the processor is configured to execute the computer execution instruction, so that the receiving end device performs the steps of any one of the possible implementation manners of the second aspect or the second aspect.

In a ninth aspect, an embodiment of the present application provides a computer storage medium, configured to store computer software instructions for the sending-end device, where the computer software instructions include instructions for causing the sending-end device to perform the steps of the first aspect or any possible implementation manner of the first aspect.

In a tenth aspect, an embodiment of the present application provides a computer storage medium, configured to store computer software instructions for the sending-end device, where the computer software instructions include instructions for causing a receiving-end device to perform the steps of the first aspect or any possible implementation manner of the first aspect.

In an eleventh aspect, an embodiment of the present application provides a sending end device, including: the memory is used for storing program instructions, and the processor is used for calling the program instructions in the memory to realize the functions of the sending terminal device in the above method embodiments.

In a twelfth aspect, an embodiment of the present application provides a receiving end device, including: the memory is used for storing program instructions, and the processor is used for calling the program instructions in the memory to realize the functions of the receiving terminal device in the above method embodiments.

According to the redundancy version transmission method and device provided by the embodiment of the application, the sending end device generates the first RV based on the data bit to be transmitted and sends the first RV to the receiving end device, if the receiving end device fails to correctly decode part or all of the data bit to be transmitted based on the first RV, the receiving end device sends feedback information to the sending end device, and the sending end device generates the second RV according to the feedback information. In the process, after retransmission every time, if the receiving end equipment does not correctly decode part or all of the data bits to be transmitted, the sending end equipment transmits the RV according to the feedback information sent by the receiving end equipment, the initial position and the length of the RV can be adaptively adjusted according to the feedback information, and resource waste caused by sending the RV with a fixed length is avoided.

Drawings

FIG. 1 is a schematic diagram of a circular buffer;

FIG. 2 is a schematic diagram of a system architecture to which the redundancy version generation method of the present application is applied;

fig. 3 is a signaling diagram of a redundancy version generation method according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a circular buffer in another RV generation method of the present application;

fig. 5 is a schematic structural diagram of a first embodiment of a sending-end device according to the present application;

fig. 6 is a schematic structural diagram of a receiving end device according to a first embodiment of the present application;

fig. 7 is a schematic structural diagram of a second embodiment of a sending-end device according to the present application;

fig. 8 is a schematic structural diagram of a second embodiment of a receiving end device in the present application;

fig. 9 is a schematic structural diagram of a third embodiment of a sending-end device according to the present application;

fig. 10 is a schematic structural diagram of a fourth embodiment of a sending-end device according to the present application;

fig. 11 is a schematic structural diagram of a fourth embodiment of a sending-end device according to the present application;

fig. 12 is a schematic structural diagram of a fourth receiving end device according to the present application.

Detailed Description

The technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present disclosure.

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

FIG. 1 is a diagram of a circular buffer.

Referring to fig. 1, in the process of generating an RV currently, a sending end device selects a corresponding MCS based on a Channel, such as a Signal to Interference plus Noise Ratio (SINR) of the Channel, a Channel Quality Indicator (CQI) of the Channel, Channel State Information (CSI) of the Channel, and generates a plurality of bit sequences with the same length and different starting positions, i.e., a plurality of RVs, such as RV0, RV1, RV2, and RV3 in the figure, in a circular buffer according to the MCS. When the MCS is different, the length of the generated RV is different. The sending end equipment selects an initial RV (RV0) from the circular buffer for first transmission; if the receiving end equipment does not correctly decode part or all of the data bits to be transmitted based on RV0 after initial transmission, the sending end equipment continues to select RV2 from the circular buffer for first retransmission; if the receiving end device still fails to correctly decode part or all of the data bits to be transmitted after the first retransmission, the sending end device continues to select the RV1 from the circular buffer for the second retransmission, and the selection order of the RVs is RV0, RV2, RV1 and RV3 from the initial transmission. The MCS adopted in the first transmission and each subsequent transmission is the MCS selected based on the initial channel state information.

However, when the reported CQI is out of date due to CQI measurement errors or delay factors, the CQI at the time of actual transmission does not match the CQI upon which the MCS was selected, resulting in selection of an unsuitable MCS. When the MCS is low, the code rate of channel coding is correspondingly reduced, resulting in an increase of bits of redundancy version in the circular buffer. However, the length of the multiple RVs in the circular buffer is the same, and the starting positions are different, so the number of bits of each RV is higher, that is, the length of each RV is larger. The IR HARQ mechanism is a non-adaptive HARQ mechanism, and in this mechanism, when initial transmission fails, the length of the RV for each retransmission is fixed, which results in that the initial transmission and each subsequent retransmission occupy more resources, resulting in resource waste.

Therefore, in the future evolution of LTE system and other future communication systems, such as the fifth Generation (5G) communication system, new air interface NR, etc., standardization process, it is an important research direction to improve the resource waste problem in IR HARQ mechanism. The embodiment of the application provides a method and equipment for transmitting a redundancy version, wherein a sending end device generates the redundancy version according to indication information of a receiving end device, so that the redundancy version can be flexibly generated, and resource waste is avoided.

The techniques described herein may be used in various communication systems in which Multiple types of terminals exist, such as Global System for Mobile communications (GSM), Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (Orthogonal-Division Multiple Access) systems, General Packet Radio Service (GPRS) systems, Long Term Evolution (Long Term Evolution) systems, Evolved Universal-Terrestrial Radio Access (Evolved-Terrestrial Radio-Access, Radio-a systems, and subsequent evolution systems such as 5G mobile communication systems, NR systems, and other such communication systems.

Fig. 2 is a schematic diagram of a system architecture to which the redundancy version generation method of the present application is applied.

Referring to fig. 2, in the system architecture, there are at least one sending end device and at least one receiving end device, where the receiving end device establishes a communication connection with the sending end device, and the sending end device is opposite to the receiving end device. For example, when the base station is used as the sending end device, the receiving end device is the user equipment; for another example, when the base station is used as the receiving end device, the sending end device is the user device; as another example, in Device-to-Device (D2D) communication, both the sender Device and the receiver Device are user devices.

The Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved Node B (eNB) in LTE, or a 5G Base Station, which is not limited in this application.

The user equipment may be a wired terminal or a wireless terminal, which may be a device providing voice and/or data connectivity to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a radio access network. For example, Personal Communication Service (PCS) phones, cordless phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), a User Device (User Device), or a User Equipment (User Equipment), etc.

Fig. 3 is a signaling diagram of a redundancy version generation method according to an embodiment of the present application, where the present embodiment includes:

101. the sending end device sends a first redundancy version RV to the receiving end device.

Specifically, the sending end device sends the first RV to the receiving end device after generating the first RV based on the data bits to be transmitted. For example, when transmitting for the first time, the sending end device sends an initial redundancy version, that is, RV0, to the receiving end device, where a first RV at this time is RV 0; when retransmitting for the first time, sending the RV of the first retransmission to receiving end equipment by the sending end equipment, wherein the first RV is the RV of the first retransmission; and when retransmitting for the second time, the sending end equipment sends the RV retransmitted for the second time to the receiving end equipment, and the first RV is the RV retransmitted for the second time at the moment. Accordingly, the receiving end device receives the first RV.

102. And if the receiving end equipment does not correctly decode part or all of the data bits to be transmitted based on the first RV, sending feedback information to the sending end equipment.

In the embodiment of the application, the first RV and the second RV are generated based on data to be transmitted. Assuming that the data bits to be transmitted are 100 bits and are processed into 300 bits through channel coding, the first RV and the second RV both come from the 300 bits, and the second RV has the function of helping the receiving end device to decode the original data to be transmitted more accurately, that is, the original data of 100 bits.

Optionally, after receiving the first RV, the receiving end device determines whether to correctly decode part or all of the data bits to be transmitted, and if so, sends an Acknowledgement (ACK) to the sending end device.

Or, if the receiving end device does not correctly decode part or all of the data bits to be transmitted, sending feedback information to the sending end device, where the feedback information includes Negative Acknowledgement (NACK) information, or the feedback information includes NACK information and indication information, where the feedback information is used to indicate at least one of a length of the second RV or a starting position of the second RV, and optionally, the NACK information or the indication information is used to indicate the length of the second RV or the starting position of the second RV.

The feedback information is used to indicate at least one of a start position of the second RV, a length of the second RV, or the like, either explicitly or implicitly. Taking the example that the feedback information indicates the length of the second RV, when explicitly indicating, the receiving end device carries the value of the length of the second RV in the feedback information sent to the sending end device; when implicit indication is performed, the receiving end device indirectly indicates the length of the second RV to the sending end device. For example, the receiving end device and the sending end device both maintain a mapping table, where the mapping table includes a mapping relationship between a length of NACK and a length of the second RV, and when NACK is 2bits, it indicates that the length of the second RV is 1000 bits, and when NACK is 3 bits, it indicates that the length of the second RV is 2000 bits. Therefore, if the receiving-side device transmits 2-bit NACK to the transmitting-side device, it indicates that the length of the second RV is 1000 bits.

103. And the sending end equipment sends a second RV according to the feedback information.

And when receiving the feedback information sent when the receiving end does not decode correctly, the sending end equipment generates a second RV according to the feedback information and transmits the second RV. For example, if the feedback information indicates the start position and length of the second RV, the sending end device determines the start position and length of the second RV according to the feedback information to generate the second RV; if the feedback information indicates the start position of the second RV and the length of the second RV is a preset value, the sending end device determines the start position of the second RV according to the feedback information, determines the length of the second RV according to the preset value, and then generates the second RV; for another example, if the feedback information only indicates the length of the second RV and the starting position of the second RV is a preset position, at this time, the sending end device determines the length of the second RV according to the feedback information and generates the second RV according to the fixed position and the length.

According to the RV generation method provided by the embodiment of the application, the sending end equipment generates the first RV based on the data bit to be transmitted and sends the first RV to the receiving end equipment, if the receiving end equipment fails to correctly decode part or all of the data bit to be transmitted based on the first RV, the receiving end equipment sends feedback information to the sending end equipment, and the sending end equipment generates the second RV according to the feedback information. In the process, after retransmission every time, if the receiving end equipment does not correctly decode part or all of the data bits to be transmitted, the sending end equipment transmits the RV according to the feedback information sent by the receiving end equipment, the initial position and the length of the RV can be adaptively adjusted according to the feedback information, and resource waste caused by sending the RV with a fixed length is avoided.

Optionally, in the above embodiment, the second RV is generated based on the data bits to be transmitted.

Optionally, in the above embodiment, the first RV and the second RV are RVs successively transmitted in two adjacent RV transmission processes of the sending end device, the first RV is an RV transmitted earlier, and the second RV is an RV transmitted later. After the sending end device transmits the first RV, if the receiving end device fails to correctly decode part or all of the data bits to be transmitted based on the first RV, the sending end device transmits a second RV.

Next, how the receiving end device indicates the start position of the second RV through the feedback information, and how the receiving end device indicates the length of the second RV through the feedback information are respectively described.

The receiving end device indicates the start position of the second RV through the feedback information, and specifically includes:

in one example, the feedback information indicating a start position of a second RV comprises: the feedback information indicates a relationship between a starting position of the second RV and an ending position of the first RV, and the sending end device sends the second RV according to the feedback information, including: and the sending end equipment determines the initial position of the second RV according to the relation and sends the second RV according to the initial position.

Taking the first RV as an RV (RV0) for initial transmission and the second RV as an RV for first retransmission as an example, during initial transmission, the transmitting end device selects an MCS based on initial channel state information and generates RV 0. Assuming that an MCS with an index of n is selected based on the initial channel state information, denoted as MCS (n), an initial RV (RV0) is obtained according to MCS (n), and RV0 is a first RV. After transmitting RV0, if the receiving end device does not correctly decode part or all of the data bits to be transmitted based on RV0, sending feedback information to the sending end device to indicate the relationship between the starting position of the second RV and the ending position of the first RV. The sending end device determines the start position of the RV of the first retransmission according to the relationship, for example, the end position of the RV0 is used as the start position of the RV of the first retransmission; for another example, the end position of RV0 is offset by a value according to the offset (offset) value, and the offset end position is used as the start position of the RV of the first retransmission. The offset value is a preset value or indicated by the receiving end device.

In another example, the feedback information indicating a start position of a second RV comprises: the feedback information indicates a preset position, and the sending end device generates the second RV according to the feedback information, including: and the sending end equipment determines the initial position of the second RV according to the preset position and generates the second RV according to the initial position.

Specifically, the receiving end device carries a preset position in the feedback information and sends the feedback information to the sending end device, where the preset position is the start position of the second RV. Specifically, a position set may be set at the receiving end device, and the receiving end device selects a preset position from the position set randomly or according to a certain order, and sends the preset position carried in the feedback information to the sending end device.

In the method, the receiving end sets the starting position of the second RV to the sending end according to the preset position, and the length of the RV retransmitted every time is prevented from being fixed.

The receiving end device indicates the length of the second RV through the feedback information, and specifically includes:

in one example, the feedback information indicating the length of the second RV comprises: the feedback information indicates a difference value between an index of the first MCS and an index of a second MCS, and the sending end device sending the second RV according to the feedback information includes: the sending end equipment is according to the index of the first MCS and the second MCS; the first index is an index of a first Modulation and Coding Scheme (MCS), the second index is an index of a second MCS, the first MCS is an MCS selected by the transmitting end device for transmitting the first RV, and the second MCS is an MCS selected by the receiving end device for determining a second RV.

For example, the index of the first MCS is 28 and is expressed as MCS (28), the difference between the index of the first MCS indicated by the feedback information and the index of the second MCS is 1, the index of the second MCS is 27 and is expressed as MCS (27), if the length of the RV corresponding to MCS (28) is 8000 bits, the length of the RV corresponding to MCS (27) is 8500 bits, and the length of the second RV is 8500 bits plus 8000 bits.

For another example, if the index of the first MCS is 30 and is denoted as MCS (30), and the feedback information indicates that the difference between the index of the first MCS and the index of the second MCS is 2, the index of the second MCS is 28 and is denoted as MCS (28), and if the length of the RV corresponding to MCS (30) is 5400 bits and the length of the RV corresponding to MCS (28) is 8000 bits, the length of the second RV is 8000-. In this example, the length difference between the RV versions corresponding to MCS (28) and MCS (30) is directly used as the length of the second RV. However, the embodiment of the present application is not limited thereto, and in other possible implementations, when the difference between the first index and the second index is greater than 1, the difference between the lengths of the RVs corresponding to each two adjacent indexes may be determined first, and then the differences are summed, and the sum of the differences is used as the length of the second RV. Continuing with the example above, the first index is 30 and the second index is 28, and the neighboring indices include: MCS (28) and MCS (29), and MCS (29) and MCS (30). Assuming that the Modulation scheme corresponding to the MCS (28) is 64-phase Quadrature Amplitude Modulation (64 QAM), the code rate corresponding to the MCS (28) is 0.75, the Modulation scheme corresponding to the MCS (29) is 64QAM, and the code rate is 0.8, when the size of the Transport Block (TB) is 6000bit, the length of the RV corresponding to the MCS (28) is 6000/0.75, and the length of the RV corresponding to the MCS (29) is 6000/0.8, then the difference between the lengths of the RV corresponding to the MCS (28) and the MCS (29) is (6000/0.75) - (6000/0.8) — 8000-. If the code rate corresponding to MCS (30) is also 0.8, the difference between the RV length corresponding to MCS (29) and the RV length corresponding to MCS (30) is also 500 bits, and the length of the second RV is 500+500 to 1000 bits. However, if the code rate corresponding to MCS (30) is 0.9, the difference between the RV length corresponding to MCS (29) and the RV length corresponding to MCS (30) is (6000/0.8) - (6000/0.9) — 7500-.

In another example, the feedback information indicating the length of the second RV comprises: the feedback information indicates a preset value, and the sending end device generates the second RV according to the feedback information, including: and the sending end equipment determines the length of the second RV according to the preset value and generates the second RV according to the length. Wherein, the preset value can be obtained according to the initial transmission RV length or the first RV length. And the receiving terminal equipment generates a preset value in advance according to the length of the initial RV and stores the preset value, or generates a preset value according to the length of the first RV and stores the preset value after receiving the first RV each time.

In the method, the receiving end device sets the indication preset value to the sending end, so that the sending end device takes the preset value as the length of the second RV, and the preset values indicated by retransmission at each time are different, so that the lengths of the second RV are different, and the length fixation of the RV retransmitted at each time is avoided.

In yet another example, the feedback information indicating the length of the second RV comprises: the feedback information indicates a difference value between an index of the first CQI and an index of a second CQI, and the sending end device sending the second RV according to the feedback information includes: and the sending end equipment determines the length of the second RV according to the difference value of the index of the first CQI and the index of the second CQI and sends the second RV according to the length. Wherein the first MCS is a MCS selected when the transmitting end equipment transmits the first RV, the first MCS is determined based on a first CQI, the second MCS is a MCS selected when the transmitting end equipment transmits the second RV, and the second MCS is determined based on a second CQI.

Specifically, in downlink transmission, the sending end device is a base station, the receiving end device is a user equipment, the user equipment reports a Channel Quality Indicator (CQI), and the base station determines an MCS according to the CQI and performs transmission; in uplink transmission, the sending end equipment is user equipment, the receiving end equipment is a base station, and the UE selects the MCS according to the CQI. In the embodiment of the application, the scheduling process is improved. After improvement, in the downlink transmission process, the base station selects a first MCS based on the first CQI, and then selects a first RV based on the first MCS, the user equipment measures the current channel based on the fact that the first RV does not correctly decode part or all of the data bits to be transmitted to determine a second CQI, compares the first CQI with the second CQI, reports the difference value of the first CQI and the second CQI to the base station through feedback information, and the base station determines the second MCS according to the difference value carried by the feedback information, the length of the RV corresponding to the first MCS and the length of the RV corresponding to the second MCS, and determines the length of the second RV according to the difference value of the length of the RV corresponding to the first MCS and the length of the RV corresponding to the second MCS.

Optionally, referring to the operation of determining the RV based on the MCS or the CQI, the RV may also be determined based on the SINR or the CSI, which is not limited in this embodiment of the application.

In the method, the RV is dynamically generated, the RV granularity is flexibly changed, and the resource waste caused by the inconsistency of the CQI during actual transmission and the CQI according to which the MCS is selected is avoided.

It should be noted that, in the above embodiment, the receiving end device may explicitly or implicitly indicate the starting position of the second RV through feedback information. In the explicit indication process, the receiving end equipment directly indicates the starting position and/or the length of the second RV to the sending end equipment through the feedback information; in the implicit indication process, the receiving end device indirectly indicates the starting position and/or the length of the second RV to the sending end device through the feedback information. Taking the feedback information as Negative Acknowledgement (NACK) information as an example, assuming that NACKs have K types in common, the K types of NACK information are divided into at least two groups, such as a first group, a second group and other groups, the first group includes M types of NACKs, and the second group includes N types of ANCKs. When the initial position is implicitly indicated, the NACK in the first group indicates that the initial position of the second RV is related to the end position of the first RV, the correlation indicates that a certain relationship exists between the initial position of the second RV and the end position of the first RV, for example, the initial position of the first RV is the end position of the second RV, or the initial position of the second RV is obtained after the end position of the first RV is shifted, the NACK in the second group indicates a preset position, no relationship exists between the preset position and the end position of the first RV, and the preset position is the same as or different from the end position of the first RV, wherein K is greater than or equal to M + N. If the receiving end equipment sends any NACK in the first group of NACKs, the starting position of the second RV is related to the ending position of the first RV, and if the receiving end equipment sends any NACK in the second group of NACKs, the sending end equipment takes the preset position as the starting position of the second RV after receiving the NACK. For another example, when the length is implicitly indicated, when the feedback information occupies 4 bits, the length of the second RV is a preset value; when the feedback information occupies 5 bits, it indicates that the length of the second RV is half of the length of the first RV.

It should also be noted that although described above in terms of the feedback information indicating only the start position of the second RV, or the feedback information indicating only the length of the second RV, respectively. However, the present application is not limited thereto, and in other embodiments, the feedback information may also indicate the start position of the second RV and the length of the second RV at the same time.

The RV generation method described above will be described in detail below using a specific example. Specifically, referring to fig. 4, fig. 4 is a schematic diagram of a circular buffer in another RV generation method of the present application.

At the time of initial transmission, the transmitting end device generates RV0 according to the MCS selected based on the initial channel state information. For example, assuming that the MCS selected based on the initial channel state information is an MCS with index n, denoted as MCS (n), the starting position and the ending position of RV0 are determined according to the existing RV generation method, thereby generating RV0, as shown by the circled filled portion in the figure.

After transmitting RV0, if the receiving end device does not correctly decode part or all of the data bits to be transmitted based on RV0, the receiving end device sends feedback information to the sending end device. Specifically, see table 1, where table 1 is a design table of feedback information in the RV generation method of the present application.

TABLE 1

Referring to table 1, when the feedback information is 00, it indicates that the sending end device correctly receives the feedback information.

When the feedback information is 01, it indicates that the start position of the second RV is the end position of the first RV, and the difference between the index of the measured MCS and the index of the initially selected MCS is 1, i.e. the measured MCS is MCS (n-1).

When the feedback information is 10, it indicates that the start position of the second RV is the end position of the first RV, and the difference between the index of the measured MCS and the index of the initially selected MCS is 2, i.e. the measured MCS is MCS (n-2).

When the feedback information is 11, it indicates that the second RV is RV 0.

According to table 1, taking feedback information as 10 as an example, the first MCS is MCS (n), the second MCS is MCS (n-2), the second RV is RV of the first retransmission, the length of the second RV is the difference between the length of RV corresponding to MCS (n-2) and the length corresponding to MCS (n), and is denoted as Z; or, if the difference (denoted as X) between the length of the RV corresponding to MCS (n-2) and the length of the RV corresponding to MCS (n-1) and the difference (denoted as Y) between the length of the RV corresponding to MCS (n-1) and the length of the RV corresponding to MCS (n), the length of the second RV is X + Y; alternatively, the second RV is of length T, T ═ X + Y + C, C is a constant or variable related to MCS (n) and MCS (n-2). Wherein X and Y are the same or different, and Z and X + Y are the same or different. The second RV is shown as a checkered filled portion of the figure.

It should be noted that table 1 is only an example of the feedback information definition, and the specific definition manner of the feedback information may include many kinds, for example, the following tables 2 and 3, where table 2 is another design table of the feedback information in the RV generation method of the present application, and table 3 is another design table of the feedback information in the RV generation method of the present application.

TABLE 2

Referring to table 2, the first CQI is mcs (n), and when the feedback information is 00, it indicates that the sending end device correctly receives the feedback information.

When the feedback information is 01, it indicates that the starting position of the second RV is the ending position of the first RV, and the difference between the measured CQI and the CQI of the initial channel is 1, that is, the measured CQI is CQI (n-1).

When the feedback information is 10, it indicates that the starting position of the second RV is the ending position of the first RV, and the difference between the index of the measured CQI and the index of the initially selected CQI is 2, i.e., the measured CQI is CQI (n-2).

When the feedback information is 11, it indicates that the second RV is RV 0.

According to table 1, taking feedback information as 10 as an example, the first CQI is CQI (n), the second CQI is CQI (n-2), the second RV is RV for the first retransmission, the MCS selected according to CQI (n) is the first MCS, and the MCS selected according to CQI (n-2) is the second MCS, and the length of the second RV is a difference value between the length of the RV corresponding to the first MCS and the length corresponding to the second MCS, and is denoted as Z; or, the MCS selected according to CQI (n) is a first MCS, the MCS selected according to CQI (n-2) is a second MCS, the MCS selected according to CQI (n-1) is a third MCS, the difference value between the length of the RV corresponding to the third MCS and the length of the RV corresponding to the second MCS is X, the difference value between the length of the RV corresponding to the second MCS and the length of the RV corresponding to the first MCS is Y, and the length of the second RV is X + … Y; alternatively, the second RV is of length T, T ═ X + Y + C, C is a constant or variable related to CQI (n) and CQI (n-2). Wherein X and Y are the same or different, and Z and X + Y are the same or different.

TABLE 3

Length information (2bits)	Corresponding meaning
		00	MCS(n-1)-MCS(n)
01	MCS(n-2)-MCS(n)
		10	MCS(n-3)-MCS(n)
11	Reserved bit

Referring to table 3, it is assumed that the selected MCS is MCS (n) for the initial transmission, and when the feedback information is 00, the difference between the index of the measured MCS and the index of the initially selected MCS is 1, that is, the first MCS is MCS (n), and the second MCS is MCS (n-1); when the length information is 01, the difference value between the index of the MCS obtained by measurement and the index of the MCS selected initially is 2, namely the first MCS is MCS (n), and the second MCS is MCS (n-2); when the length information is 10, the difference value between the index of the measured MCS and the index of the initially selected MCS is 3, namely the first MCS is MCS (n), and the second MCS is MCS (n-3); when the length information is 11, it is temporarily used as a reserved bit.

If the RV of the first retransmission is not correctly received by the receiving end after the initial transmission and the first retransmission, and the second retransmission is required, the index of the measured MCS is assumed to be n-3, the MCS is denoted as MCS (n-3), the length information is 00, and since the MCS selected for the first retransmission is MCS (n-2), at this time, the first MCS is MCS (n-2), and the second MCS is MCS (n-3), the length of the RV of the second retransmission is the difference value of the lengths of RVs respectively corresponding to MCS (n-3) and MCS (n-2). The RV for the second retransmission is shown in the triangular filled portion of the figure.

In the method, the sending end equipment determines the length of the RV of the retransmission according to the difference value between the index of the MCS measured by the receiving end equipment and the index of the MCS selected in the last transmission. Because the MCS measured by the receiving end equipment conforms to the current channel state information, resource waste caused by the RV with the fixed length of the sending end equipment is avoided.

In addition, after receiving the feedback information, the sending end device may further determine a second MCS according to the feedback information, where the second MCS is an MCS obtained by the receiving end device measuring a channel. And during each retransmission, the sending terminal equipment selects a corresponding modulation order, a transmission block size and the like according to the determined second MCS, and performs the retransmission according to the initial position and the length of the RV of the retransmission. In the process, the receiving end equipment only sends the difference value between the index of the MCS obtained by measurement and the index of the MCS selected in the initial transmission to the sending end equipment, so that the sending end equipment determines the second MCS according to the difference value, and the channel resource occupied by the difference value is far less than the channel resource occupied by the complete second MCS, thereby saving the channel resource to a certain extent.

In addition, in the above embodiment, the sending end device may also determine to generate the second RV by itself, instead of generating the second RV according to the feedback information, that is, determine the start position and length of the second RV by itself and generate the second RV. In this case, the transmitting device needs to notify the receiving device of the second RV generated by itself. Specifically, after receiving feedback information sent by the receiving end device, the sending end device measures a channel to generate a second RV, where the second RV is different from a second RV generated by the sending end device according to the feedback information, and then sends the second RV generated according to the channel measurement to the receiving end device, and sends indication information to the receiving end device to indicate that the second RV sent by the sending end device is generated based on the channel measurement, but not generated according to the feedback information. For example, the feedback information received by the receiving end device indicates that the starting position of the second RV is the ending position of the first RV, the length of the second RV is half of the length of the first RV, and the sending end device measures and discovers the channel: the second RV should be RV0, that is, the start position of the second RV is the start position of RV0, and the length of the second RV is RV0, at this time, the sending end device sends indication information to the receiving end device, indicates that the second RV is RV0, and transmits the second RV, that is, RV0 to the receiving end device.

In addition, in the foregoing embodiment, after the sending end device generates the second RV, the sending end device further sends the second RV to the receiving end device after at least one of puncturing or rate matching according to the second length that is the same as the version. For example, when the resource required by the second RV is greater than the transmission resource allocated to the transmitting end device, the second RV may be transmitted after at least one of puncturing and rate matching.

Fig. 5 is a schematic structural diagram of a first embodiment of a sending-end device according to the present application. The sending end device provided in this embodiment may implement each step of the method applied to the sending end device in this application, and a specific implementation process is not described herein again. Specifically, the sending-end device 100 provided in this embodiment includes:

a sending module 11, configured to send a first redundancy version RV to a receiving end device, where the first RV is generated based on a data bit to be transmitted;

a receiving module 12, configured to receive feedback information sent by the receiving end device if the receiving end device incorrectly decodes part or all of the data bits to be transmitted based on the first RV, where the feedback information is used to indicate at least one of an initial position of a second RV and a length of the second RV;

the sending module 11 is further configured to send the second RV according to the feedback information.

The sending end device provided by the embodiment of the application generates the first RV based on the data bit to be transmitted and sends the first RV to the receiving end device, if the receiving end device fails to correctly decode part or all of the data bit to be transmitted based on the first RV, the receiving end device sends feedback information to the sending end device, and the sending end device generates the second RV according to the feedback information. In the process, after retransmission every time, if the receiving end equipment does not correctly decode part or all of the data bits to be transmitted, the sending end equipment transmits the RV according to the feedback information sent by the receiving end equipment, the initial position and the length of the RV can be adaptively adjusted according to the feedback information, and resource waste caused by sending the RV with a fixed length is avoided.

Optionally, in an embodiment of the present application, the second RV is generated based on the data bits to be transmitted.

Referring to fig. 5 again, optionally, in an embodiment of the present application, the sending-end device further includes: the processing module 13, where the feedback information indicates a start position of the second RV includes: the feedback information indicates a relationship of a starting position of the second RV and an ending position of the first RV;

the processing module 13 is configured to determine an initial position of the second RV according to the relationship;

the sending module 11 is specifically configured to send the second RV according to the starting position.

Optionally, in an embodiment of the present application, the processing module 13 is further configured to select a first modulation and coding scheme MCS when sending the first RV, and the feedback information indicates that a starting position of the second RV includes: the feedback information indicates a difference of an index of the first MCS and an index of a second MCS;

the processing module 13 is further configured to determine the length of the second RV according to a difference between the index of the first MCS and the index of the second MCS;

the sending module 11 is further configured to send the second RV according to the length.

Optionally, in an embodiment of this application, the processing module 13 is further configured to select a first MCS when sending the first RV, where the first MCS is determined based on a first CQI, and the feedback information indicates a start position of a second RV, where the feedback information includes: the feedback information indicates a difference value of an index of the first CQI and an index of a second CQI;

the processing module 13 is further configured to determine a length of the second RV according to a difference between the index of the first CQI and the index of the second CQI;

Fig. 6 is a schematic structural diagram of a receiving end device according to a first embodiment of the present application. The receiving end device provided in this embodiment may implement each step of the method applied to the receiving end device in this application, and a specific implementation process is not described herein again. Specifically, the receiving end device 200 provided in this embodiment includes:

a receiving module 22, configured to receive a first redundancy version RV sent by a sending end device, where the first RV is generated by the sending end device based on a data bit to be transmitted;

a sending module 21, configured to send feedback information if the receiving end device does not correctly decode part or all of the data bits to be transmitted based on the first RV, where the feedback information is used to indicate at least one of a start position of a second RV and a length of the second RV.

The receiving end device provided by the embodiment of the application receives a first RV sent by a sending end device, the first RV is generated by the sending end device based on a data bit to be transmitted, if the receiving end device fails to correctly decode part or all of the data bit to be transmitted based on the first RV, the receiving end device sends feedback information to the sending end device, and the sending end device generates a second RV according to the feedback information. In the process, after retransmission every time, if the receiving end equipment does not correctly decode part or all of the data bits to be transmitted, the sending end equipment transmits the RV according to the feedback information sent by the receiving end equipment, the initial position and the length of the RV can be adaptively adjusted according to the feedback information, and resource waste caused by sending the RV with a fixed length is avoided

Optionally, in an embodiment of the present application, the indicating the starting position of the second RV by the feedback information includes: the feedback information indicates a relationship of a starting position of the second RV and an ending position of the first RV.

Referring to fig. 6 again, optionally, in an embodiment of the present application, the receiving end device further includes: a processing module 23, where the first modulation and coding scheme MCS is a MCS selected when the sending end device sends the first RV, and the processing module 23 is configured to select a second MCS;

the sending module 21 is configured to send the feedback information, where the feedback information indicates that a starting position of the second RV includes: the feedback information indicates a difference of an index of the first MCS and an index of a second MCS.

Optionally, in an embodiment of the present application, the receiving end device further includes: a processing module 23, where the first modulation and coding scheme MCS is a selected MCS when the sending end device sends the first RV, and the processing module 23 is configured to determine a second CQI;

the sending module 21 is configured to send feedback information, where the feedback information indicates that a starting position of the second RV includes: the feedback information indicates a difference value of an index of the first CQI and an index of the second CQI.

Fig. 7 is a schematic structural diagram of a second sending-end device in an embodiment of the present application, where the sending-end device 300 provided in the embodiment of the present application includes: the device comprises a processor 31, a memory 32, a communication interface 33 and a system bus 34, wherein the memory 32 and the communication interface 33 are connected with the processor 31 through the system bus 34 and complete mutual communication, the memory 32 is used for storing computer execution instructions, the communication interface 33 is used for communicating with other devices, and the processor 31 is used for operating the computer execution instructions to enable the sending-end device to execute the steps applied to the sending-end device.

Fig. 8 is a schematic structural diagram of a second receiving end device according to the present application, where the receiving end device 400 according to the present application includes: the device comprises a processor 41, a memory 42, a communication interface 43 and a system bus 44, wherein the memory 42 and the communication interface 43 are connected with the processor 41 through the system bus 44 and complete mutual communication, the memory 42 is used for storing computer execution instructions, the communication interface 43 is used for communicating with other devices, and the processor 41 is used for operating the computer execution instructions to enable the receiving device to execute the steps applied to the receiving device.

Fig. 9 is a schematic structural diagram of a third sending-end device embodiment of the present application, where the sending-end device 500 provided in the embodiment of the present application includes: the redundancy transmission method comprises a transceiver 51 and a processor 52, wherein the transceiver 51 is used for sending a first Redundancy Version (RV) to receiving end equipment, and the first RV is generated based on data bits to be transmitted; if the receiving end device does not correctly decode part or all of the data bits to be transmitted based on the first RV, the transceiver 51 is further configured to receive feedback information sent by the receiving end device, where the feedback information is used to indicate at least one of an initial position of a second RV and a length of the second RV; the transceiver 51 is further configured to send the second RV to the receiving end device.

Fig. 10 is a schematic structural diagram of a fourth sending-end device in the embodiment of the present application, where the sending-end device 600 provided in the embodiment of the present application includes: the transmitter-receiver 61 is configured to receive a first redundancy version RV from a sending end device, where the first RV is generated by the sending end device based on a data bit to be transmitted; if the receiving end device does not correctly decode part or all of the data bits to be transmitted based on the first RV, the transceiver 61 is configured to send feedback information to the sending end device, where the feedback information is used to indicate at least one of a start position of a second RV and a length of the second RV.

Fig. 11 is a schematic structural diagram of a fourth sending-end device in the present application, where the sending-end device 700 provided in the present application includes: a memory 71 and a processor 72, where the memory 71 is configured to store program instructions, and the processor 72 is configured to call the program instructions in the memory 71, so as to implement the functions of the sending-end device in the foregoing method embodiments.

Fig. 12 is a schematic structural diagram of a fourth receiving end device in the present application, where the receiving end device 800 provided in the present application includes: a memory 81 and a processor 82, where the memory 81 is configured to store program instructions, and the processor 82 is configured to call the program instructions in the memory 81, so as to implement the functions of the receiving end device in the foregoing method embodiments.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Claims

1. A redundancy version transmission method, comprising:

sending a first Redundancy Version (RV) to receiving end equipment by sending end equipment, wherein the first RV is generated based on data bits to be transmitted;

if the receiving end device does not correctly decode part or all of the data bits to be transmitted based on the first RV, the sending end device receives feedback information sent by the receiving end device, wherein the feedback information is used for indicating at least one of the starting position of a second RV and the length of the second RV;

and the sending end equipment sends the second RV according to the feedback information, wherein the second RV is a section of continuous part in a ring buffer, and the ring buffer stores a plurality of RVs, and the plurality of RVs comprise the first RV and the second RV.

2. The method of claim 1,

the second RV is generated based on the data bits to be transmitted.

3. The method according to claim 1 or 2,

the feedback information indicating a starting position of a second RV comprises: the feedback information indicates a relationship between a starting position of the second RV and an ending position of the first RV, and the sending end device sends the second RV according to the feedback information, including: and the sending end equipment determines the initial position of the second RV according to the relation and sends the second RV according to the initial position.

4. The method according to claim 1 or 2, characterized in that the method further comprises:

the sending end equipment selects a first Modulation and Coding Scheme (MCS) when sending the first RV, and the feedback information indicates that the starting position of the second RV comprises: the feedback information indicates a difference value between an index of the first MCS and an index of a second MCS, and the second MCS is an MCS selected by the receiving end device for determining the second RV;

5. The method according to claim 1 or 2, characterized in that the method further comprises:

the sending end equipment selects a first Modulation and Coding Scheme (MCS) when sending the first RV, the first MCS is determined based on first Channel Quality Information (CQI), and the feedback information indicates that the starting position of a second RV comprises: the feedback information indicates a difference value between an index of the first CQI and an index of a second CQI, the second CQI is used for determining a second MCS, and the second MCS is an MCS selected by the receiving end device for determining a second RV;

6. A Redundancy Version (RV) transmission method is characterized by comprising the following steps:

receiving end equipment receives a first Redundancy Version (RV) sent by sending end equipment, wherein the first RV is generated by the sending end equipment based on data bits to be transmitted;

if the receiving end device does not correctly decode part or all of the data bits to be transmitted based on the first RV, sending feedback information to the sending end device, where the feedback information is used to indicate at least one of a start position of a second RV and a length of the second RV, the second RV is a continuous section of a ring buffer, and the ring buffer stores multiple RVs, where the multiple RVs include the first RV and the second RV.

7. The method of claim 6,

the second RV is generated based on the data bits to be transmitted.

8. The method according to claim 6 or 7,

the feedback information indicating a starting position of a second RV comprises: the feedback information indicates a relationship of a starting position of the second RV and an ending position of the first RV.

9. The method according to claim 6 or 7,

the receiving end equipment selects a second modulation and coding scheme MCS, and sends the feedback information, wherein the feedback information indicates that the starting position of the second RV comprises: the feedback information indicates a difference value between an index of a first MCS and an index of a second MCS, the second MCS is an MCS selected by the receiving end device for determining the second RV, and the first modulation and coding scheme MCS is an MCS selected by the transmitting end device when transmitting the first RV.

10. The method according to claim 6 or 7,

the receiving end equipment determines a second channel quality information CQI and sends feedback information, and the feedback information indicates the starting position of a second RV and comprises the following steps: the feedback information indicates a difference value between an index of a first CQI and an index of a second CQI, the second CQI is used to determine a second modulation and coding scheme MCS, the second MCS is an MCS selected by the receiving end device for determining a second RV, the first modulation and coding scheme MCS is an MCS selected by the transmitting end device when transmitting a first RV, and the first MCS is determined based on the first CQI.

11. A transmitting-end device, comprising:

the transceiver is further configured to send the second RV to the receiving end device, where the second RV is a continuous segment in a ring buffer, and the ring buffer stores multiple RVs, where the multiple RVs include the first RV and the second RV.

12. The apparatus of claim 11,

the second RV is generated based on the data bits to be transmitted.

13. The apparatus of claim 11 or 12, further comprising: a processor, the feedback information indicating a starting position of a second RV comprising: the feedback information indicates a relationship of a start position of the second RV to an end position of the first RV,

14. The apparatus of claim 11 or 12, further comprising: a processor for processing the received data, wherein the processor is used for processing the received data,

the processor selects a first Modulation and Coding Scheme (MCS) when determining the first RV, and the feedback information indicates a start position of a second RV, including: the feedback information indicates a difference value between an index of the first MCS and an index of a second MCS, the second MCS being a MCS selected for determining the second RV;

the transceiver is configured to send a second RV according to the length.

15. The apparatus of claim 11 or 12, further comprising: a processor for processing the received data, wherein the processor is used for processing the received data,

the processor is configured to select a first modulation and coding scheme, MCS, when the transceiver transmits the first RV, the first MCS being determined based on a first channel quality information, CQI, and the feedback information indicating a start position of a second RV includes: the feedback information indicates a difference value between an index of the first CQI and an index of a second CQI, the second CQI is used for determining a second MCS, and the second MCS is an MCS selected by the receiving end device for determining a second RV;

the transceiver is configured to send a second RV according to the length.

16. A receiving-end device, comprising a transceiver:

if the receiving end device does not correctly decode part or all of the data bits to be transmitted based on the first RV, the transceiver is configured to send feedback information to the sending end device, where the feedback information is used to indicate at least one of a start position of a second RV and a length of the second RV, the second RV is a continuous section in a ring buffer, and the ring buffer stores multiple RVs, where the multiple RVs include the first RV and the second RV.

17. The apparatus of claim 16,

the second RV is generated based on the data bits to be transmitted.

18. The apparatus according to claim 16 or 17,

19. The apparatus of claim 16 or 17, further comprising: a processor for processing the received data, wherein the processor is used for processing the received data,

the processor is used for selecting a second Modulation and Coding Scheme (MCS);

the transceiver is configured to send the feedback information, where the feedback information indicates a starting position of a second RV and includes: the feedback information indicates a difference value between an index of a first MCS and an index of a second MCS, the second MCS is an MCS selected by the receiving end device for determining the second RV, and the first modulation and coding scheme MCS is an MCS selected by the transmitting end device when transmitting the first RV.

20. The apparatus of claim 16 or 17, wherein the receiving end apparatus further comprises a processor, wherein a first Modulation and Coding Scheme (MCS) is a selected MCS when the transmitting end apparatus transmits a first RV, the first MCS is determined based on a first Channel Quality Information (CQI),

the transceiver is configured to send the feedback information, where the feedback information indicates a starting position of a second RV and includes: the feedback information is used for indicating a difference value between an index of the first CQI and an index of a second CQI, the processor is configured to determine a second CQI, the second CQI is used for determining a second MCS, and the second MCS is an MCS selected by the receiving end device for determining the second RV.