CN107682128B - Data transmission method, device, equipment and storage medium - Google Patents
Data transmission method, device, equipment and storage medium Download PDFInfo
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- CN107682128B CN107682128B CN201710776148.8A CN201710776148A CN107682128B CN 107682128 B CN107682128 B CN 107682128B CN 201710776148 A CN201710776148 A CN 201710776148A CN 107682128 B CN107682128 B CN 107682128B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
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Abstract
A method of data transmission, the method comprising: transmitting the scheduling information to the receiving device through at least one control channel; according to the scheduling information, performing data transmission for multiple times through a plurality of data channels, and transmitting the data processed by the transmission block to the receiving equipment; when the receiving equipment merges the data received for many times and verifies the merged data, receiving a response message fed back by the receiving equipment according to a verification result; and determining retransmission of the transport block according to the received response message. The invention also provides a sending device and a receiving device. The invention reduces the processing time delay, saves the time, provides a new data retransmission opportunity, improves the probability of correct demodulation of the data, increases the reliability of the data, and is more suitable for services with extremely low time delay requirements and extremely high data reliability requirements.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a data transmission method, apparatus, device, and storage medium.
Background
An existing wireless communication system, such as a 3GPP Long Term Evolution (LTE) system, introduces a Hybrid Automatic Repeat Request (HARQ) technology to improve the transmission reliability of a physical layer. For the same Physical Downlink Shared Channel (PDSCH) Transport Block (TB), a transmitter (e.g., a base station) transmits processed data for the Transport Block to a receiver if the receiver (e.g., a terminal) does not correctly receive the Transport Block transmitted by the transmitter. The transmitter performs a number of retransmissions until the transport block is correctly received by the terminal or the transmission of the transport block is terminated after a maximum number of retransmissions is reached. For each data transmission of the transmitter, the receiver needs to feed back an uplink Acknowledgement (ACK)/Negative Acknowledgement (NACK).
In the existing LTE system, downlink data transmission is taken as an example, one-time scheduling information corresponds to one-time PDSCH transmission, and one-time ACK/NACK information feedback; if the PDSCH transmission block needs to be retransmitted, the data transmission process needs to be scheduled for multiple times, retransmitted for multiple PDSCHs and fed back for multiple ACK/NACK information. For example, a downlink data transmission process in the prior art is shown in fig. 1. For each data transmission of the PDSCH transport block, the base station first sends scheduling information to the terminal, where the scheduling information (e.g., first scheduling information, second scheduling information, etc.) indicates information of the PDSCH transport format, time domain resources, frequency domain resources, etc. sent to the terminal. For the dynamic scheduling mode, the control channel carrying the scheduling information and the data channel carrying the data information are located in the same downlink Transmission Time Interval (TTI), where one downlink TTI is a basic data Transmission unit. Then, on the indicated time domain resource and frequency domain resource, the terminal demodulates the PDSCH according to the indicated data transmission format, and feeds back ACK/NACK information whether the PDSCH transmission block is correctly received to the base station on an uplink ACK/NACK channel. And the base station detects whether the terminal correctly receives the PDSCH transmission block or not by detecting an uplink ACK/NACK channel sent by the terminal. If the base station detects that the terminal does not correctly receive the PDSCH transmission block, the base station performs the dispatching of the PDSCH and the data transmission of the PDSCH again, and the terminal demodulates the retransmitted PDSCH again and performs the feedback of ACK/NACK information.
Currently, in order to meet potential applications in the fields of intelligent transportation, automatic driving, industrial automation, and the like, a New Radio Access Technology (NR) of 5G needs to support a wireless Communication requirement of an Ultra Reliable and Low Latency Communication URLLC service (URLLC). URLLC requires low-delay, high-reliability communication transmission, typically requiring unidirectional transmission delay less than 0.5ms, error rate of data packet below 1e-5, or reliability index of data packet above 99.999%.
A simple way to meet the low latency and high reliability transmission requirements is to improve the reliability of a single data transmission, i.e. a one-pass pair. It is desirable to use more frequency domain resources to reduce the code rate of a single transmission, and thus the error probability of a data packet, but this method will bring about a great reduction in the transmission efficiency of the system. The main reason is that the reliability requirement of the URLLC service is much higher than that of an enhanced Mobile BroadBand (eMBB) service, and if a method for improving the reliability of single transmission is adopted, very many frequency domain resources need to be allocated at one time, resulting in a low resource utilization rate of the overall system and reducing the number of users multiplexed in the same TTI. Therefore, satisfying the traffic needs of URLLC through multiple retransmissions remains a major candidate.
For the prior art scheme supporting multiple transmissions, after receiving PDSCH data each time, the terminal needs to feed back ACK/NACK information once, which results in a large time interval between retransmission and initial transmission of PDSCH, and increases transmission delay of URLLC service.
Taking a system configuration as an example, as shown in fig. 2, a downlink transmission transmitter is taken as a base station, and a receiver is taken as a terminal for illustration. The subcarrier spacing of the system is 60kHz, each TTI contains 7 Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the time length of each TTI is 0.125 ms. The initial PDSCH is transmitted in the initial TTI. Considering the processing time of the terminal, the uplink ACK/NACK information may be transmitted to the base station at the first TTI at the earliest. Since the PDSCH is not correctly demodulated by the terminal, the base station side receives the negative acknowledgement NACK, and after re-scheduling and baseband processing, the base station can perform the first retransmission of the PDSCH only at the third TTI at the earliest. It can be seen that the delay length of at least 2 TTIs, i.e. 0.25ms, is increased between the initial transmission and the retransmission due to the ACK/NACK transmission and reception. This has two consequences, first, resulting in a reduction of retransmission opportunities for PDSCH within 0.5 ms; the reduction of retransmission opportunities in the same time is not beneficial to the improvement of reliability by multiple retransmissions. Secondly, the transmission delay of the PDSCH is increased, i.e. at least 0.25ms is increased, which affects the delay performance of the URLLC service.
Disclosure of Invention
In view of the above, it is necessary to provide a data transmission method and apparatus, which reduces processing delay, saves time, provides new data retransmission opportunities, improves the probability of correct data demodulation, increases data reliability, and is more suitable for services with extremely low delay requirement and extremely high data reliability requirement
A data transmission method is applied to a sending device, and comprises the following steps:
transmitting the scheduling information to the receiving device through at least one control channel;
according to the scheduling information, performing data transmission for multiple times through a plurality of data channels, and transmitting the data processed by the transmission block to the receiving equipment;
when the receiving equipment merges the data received for many times and verifies the merged data, receiving a response message fed back by the receiving equipment according to a verification result;
and determining retransmission of the transport block according to the received response message.
According to the preferred embodiment of the present invention, the scheduling information is single scheduling information or multiple scheduling information:
when the scheduling information is single scheduling information, the single scheduling information is used for indicating the multiple data transmissions; or
When the scheduling information is multi-time scheduling information, one-time data transmission corresponds to one-time scheduling information, and any one of the multi-time scheduling information is used for indicating data transmission corresponding to any one of the multi-time scheduling information.
According to the preferred embodiment of the present invention, when the scheduling information is single scheduling information, the scheduling information is sent to the receiving device through a control channel, and the control channel and one of the data channels are in the same transmission time interval; or
The one control channel is located in a different subframe than the plurality of data channels.
According to the preferred embodiment of the present invention, when the scheduling information is multiple scheduling information, the scheduling information is sent to the receiving device through a plurality of control channels, and in the plurality of control channels, a control channel carrying the scheduling information of any time and a data channel carrying data transmission corresponding to the scheduling information of any time are in the same transmission time interval; or
The control channel carrying the scheduling information of any time and the data channel carrying the data transmission corresponding to the scheduling information of any time are not in the same transmission time interval.
According to a preferred embodiment of the invention, the method further comprises:
and when the scheduling information is multi-time scheduling information, adaptively adjusting and bearing a data channel corresponding to each data transmission in the multi-time data transmission according to the change of the channel condition.
According to a preferred embodiment of the present invention, said determining retransmission of said transport block according to the received acknowledgement message comprises:
stopping retransmission of the transport block when the received acknowledgement message is a positive acknowledgement, ACK, message; or
And when the received response message is a negative response (NACK) message, performing retransmission scheduling on the transmission block until a retransmission termination condition is reached.
A data transmission method is applied to a receiving device, and comprises the following steps:
receiving scheduling information sent by sending equipment through at least one control channel;
receiving data transmitted by the transmitting device through multiple data transmissions multiple times based on the received scheduling information;
merging the data received for a plurality of times based on the received scheduling information;
verifying the merged data to obtain a verification result;
and sending a response message to the sending equipment according to the checking result.
According to a preferred embodiment of the present invention, the sending a response message to the sending device according to the verification result includes:
when the check result is that the transmission block is successfully received, sending an Acknowledgement (ACK) message to the sending equipment;
and when the checking result is that the transmission block is not successfully received, sending a Negative Acknowledgement (NACK) message to the sending equipment.
A transmitting device comprising a memory for storing at least one instruction and a processor for executing the at least one instruction to implement the data transmission method of any of the embodiments.
A receiving device, comprising a storage device and a processing device, wherein the storage device is configured to store at least one instruction, and the processing device is configured to execute the at least one instruction to implement the data transmission method in any embodiment.
A computer readable storage medium having stored thereon at least one instruction that when executed by a processor implements a data transfer method, the data transfer method comprising the data transfer method of any implementation and/or the data transfer method of any implementation.
According to the technical scheme, the scheduling information is sent to the receiving equipment through at least one control channel; according to the scheduling information, performing data transmission for multiple times through a plurality of data channels, and transmitting the data processed by the transmission block to the receiving equipment; when the receiving equipment merges the data received for many times and verifies the merged data, receiving a response message fed back by the receiving equipment according to a verification result; and determining retransmission of the transport block according to the received response message. Therefore, the invention only feeds back the response message once for the data transmitted for many times, reduces the processing time delay, saves the time, provides a new data retransmission opportunity, improves the probability of correct demodulation of the data, increases the reliability of the data, and is more suitable for services with extremely low time delay requirements and extremely high data reliability requirements, such as URLLC (unified resource level control) and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a diagram of a downlink data transmission.
Fig. 2 is a schematic diagram of a system configuration.
Fig. 3 is a flow chart of a data transmission method according to a first preferred embodiment of the present invention.
Fig. 4 is a schematic diagram of a single scheduled data transmission of the present invention.
Fig. 5 is a schematic diagram of multiple scheduled data transmissions of the present invention.
FIG. 6 is a flowchart illustrating a data transmission method according to a second preferred embodiment of the present invention.
Fig. 7 is a functional block diagram of a data transmission device according to a first preferred embodiment of the present invention.
Fig. 8 is a functional block diagram of a data transmission device according to a first preferred embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a sending device according to a preferred embodiment of the present invention.
Fig. 10 is a schematic structural diagram of a receiving device according to a preferred embodiment of the present invention.
Description of the main elements
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
In a preferred embodiment of the invention, a transmitting device communicates with a receiving device. And when the sending equipment is a base station, the receiving equipment is terminal equipment. Of course, in other embodiments, the sending device is not limited to the base station, and the receiving device is not limited to the terminal device. For example, the sending device and the receiving device may also be network devices including, but not limited to, a single network server, a server group consisting of a plurality of network servers, or a cloud based computing (CloudComputing) cloud consisting of a large number of hosts or network servers, wherein cloud computing is one of distributed computing, and is a super virtual computer consisting of a collection of loosely coupled computers.
A base station (e.g., access point) can refer to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The base station may be configured to interconvert received air frames and IP packets as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) network. The base station may also coordinate management of attributes for the air interface. For example, the Base Station may be a Base Transceiver Station (BTS) in Global System for Mobile Communication (GSM) or Code Division Multiple Access (CDMA), a Base Station (NodeB) in Wideband Code Division Multiple Access (WCDMA), or an evolved Node B (NodeB or eNB or e-NodeB) in LTE, which is not limited in the present application.
The terminal device is a device capable of automatically performing numerical calculation and/or information processing according to a preset or stored instruction, and the hardware includes, but is not limited to, a microprocessor, an Application Specific Integrated Circuit (ASIC), a Programmable Gate Array (FPGA), a Digital Signal Processor (DSP), an embedded device, and the like.
The terminal device may be 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, or may be a wired terminal. 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 (e.g., RAN). For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) 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), an Access point (Access point), 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).
Fig. 1 is a flow chart of a data transmission method according to a first preferred embodiment of the present invention. The order of the steps in the flow chart may be changed and some steps may be omitted according to different needs.
S10, the transmitting device transmits the scheduling information to the receiving device through at least one control channel.
In a preferred embodiment, the scheduling information is used to indicate a plurality of data transmissions of data processed for one Transport Block (TB). The transport blocks include, but are not limited to: a Physical Downlink Shared Channel (PDSCH) transport block. Processing of the transport block includes, but is not limited to: the method comprises a series of bit operations such as transmission block Cyclic Redundancy Check (CRC) addition, code block segmentation, Code Block (CB) Cyclic Redundancy Check addition, channel coding, rate matching, code block cascade and the like.
For multiple data transmissions of the same transport block, the data for each transmission may be the same or different.
In a preferred embodiment, the scheduling information may be single-time scheduling information or multi-time scheduling information.
And when the scheduling information is single scheduling information, the single scheduling information is used for indicating multiple data transmissions. That is, for multiple data transmissions, there is only one scheduling information, one feedback of the acknowledgement message. As shown in fig. 4, scheduling information indicates N data transmissions, where N is greater than 1.
The single-time scheduling information includes, but is not limited to: combinations of one or more of the following: the number of Transmission times of the Transmission block, Transmission Time Interval (TTI) resources or time slot resources occupied by each data Transmission in the multiple data transmissions, frequency domain resources occupied by each data Transmission, format information corresponding to each data Transmission, Modulation and Coding Scheme (MCS) corresponding to each data Transmission, and resource information indicating that the receiving device feeds back a response message. The format information includes, but is not limited to: code rate of coding, etc.
When the scheduling information is multi-time scheduling information, one-time data transmission corresponds to one-time scheduling information, and any one of the multi-time scheduling information is used for indicating data transmission corresponding to any one of the multi-time scheduling information. As shown in fig. 5, there are N times of data transmission, and there are N times of scheduling information, where each time of scheduling information corresponds to one time of data transmission and one time of feedback of response message. Such as the first scheduling information indicating a first data transmission, the second scheduling information indicating a second data transmission, and so on.
The scheduling information includes, but is not limited to: combinations of one or more of the following: the scheduling information of the first time is transmitted, the scheduling information of the second time is transmitted, the frequency domain resource of the data transmission corresponding to the scheduling information of the first time is transmitted, and the modulation and coding strategy of the data transmission corresponding to the scheduling information of the first time is transmitted. Wherein in the multiple times of scheduling information, at least one time of scheduling information further includes resource information indicating that the receiving device feeds back a response message.
And S11, according to the scheduling information, performing multiple data transmission through multiple data channels, and transmitting the data processed by the transmission block to the receiving device.
In a preferred embodiment, when the scheduling information is single-time scheduling information, the scheduling information is sent to the receiving device through a control channel, and the control channel and one of the data channels are in the same transmission time interval. For example, as shown in fig. 4, the control channel carrying the single scheduling information is in the same transmission time interval as the data channel carrying the first data transmission.
In other embodiments, the one control channel and the plurality of data channels may be located in different subframes.
In a preferred embodiment, when the scheduling information is multiple scheduling information, the scheduling information is sent to the receiving device through a plurality of control channels, and in the plurality of control channels, a control channel carrying the scheduling information of any time and a data channel carrying data transmission corresponding to the scheduling information of any time are in the same transmission time interval. For example, as shown in fig. 4, the first-time scheduling information corresponds to a first-time data transmission, and a control channel carrying the first-time scheduling information and a data channel carrying the first-time data transmission are in the same transmission time interval.
In other embodiments, of course, when the scheduling information is multiple times of scheduling information, the control channel carrying the scheduling information of any time and the data channel carrying the data transmission corresponding to the scheduling information of any time are not in the same transmission time interval.
Preferably, when the scheduling information is multiple times of scheduling information, the data channel corresponding to each data transmission in the multiple times of data transmission is adaptively adjusted according to the change of the channel condition. For example, MCS, the number and/or location of Resource Blocks (RBs) in the frequency domain are changed, so that the link adaptive gain can be provided for the signal reception and combination of the receiving device.
And S12, when the receiving device merges the data received for many times and the sending device verifies the merged data, receiving the response message fed back by the receiving device according to the verification result.
In a preferred embodiment, the sending device performs multiple data transmissions through multiple data channels, and transmits the data after the transmission block processing to the receiving device, so that the receiving device needs to receive the data sent by the sending device through multiple data transmissions according to the received scheduling information, and combine the data received multiple times based on the received scheduling information. And verifying the merged data to obtain a verification result.
Preferably, the sending device receives the data by using a soft information combining method. And the sending equipment performs operations of decoding block cascade, rate de-matching, channel decoding, code block cyclic redundancy check checking, code block cyclic redundancy check removal, transmission block cyclic redundancy check and the like on the data received for multiple times based on the scheduling information to obtain a check result.
Preferably, the sending device sends a response message to the sending device according to the check result and based on the response message feedback channel resource indicated by the scheduling information.
And when the checking result is that the transmission block is successfully received, sending an Acknowledgement (ACK) to the sending equipment. And when the check result indicates that the transmission block is not successfully received, sending a Negative Acknowledgement (NACK) message to the sending equipment.
The transmitting device detects on a response message feedback channel and receives a response message.
S13, the sending device determines retransmission of the transport block according to the received response message.
In a preferred embodiment, the retransmission of the transport block is stopped when the received acknowledgement message is a positive acknowledgement ACK message.
And when the received acknowledgement message is a Negative Acknowledgement (NACK) message, performing retransmission scheduling on the transmission block, namely returning to continue executing S10-S13 until a retransmission termination condition is reached.
Preferably, the retransmission termination condition includes, but is not limited to: the receiving device correctly receives the transmission block, and the data transmission times of the transmission block reach the maximum transmission times, and the like.
The invention sends the scheduling information to the receiving device through at least one control channel; according to the scheduling information, performing data transmission for multiple times through a plurality of data channels, and transmitting the data processed by the transmission block to the receiving equipment; when the receiving equipment merges the data received for many times and verifies the merged data, receiving a response message fed back by the receiving equipment according to a verification result; and determining retransmission of the transport block according to the received response message. Therefore, the invention only feeds back the response message once for the data transmitted for many times, reduces the processing time delay, saves the time, provides a new data retransmission opportunity, improves the probability of correct demodulation of the data, increases the reliability of the data, and is more suitable for the services with extremely low time delay requirement and extremely high data reliability requirement.
Fig. 6 is a flow chart of a data transmission method according to a second preferred embodiment of the present invention. The order of the steps in the flow chart may be changed and some steps may be omitted according to different needs.
S20, the receiving device receives the scheduling information transmitted by the transmitting device through the at least one control channel.
In an embodiment of the present invention, the scheduling information is used to indicate a plurality of data transmissions of data processed for one Transport Block (TB). The transport blocks include, but are not limited to: a Physical Downlink Shared Channel (PDSCH) transport block. Processing of the transport block includes, but is not limited to: the method comprises a series of bit operations such as Cyclic Redundancy Check (CRC) addition, code block segmentation, Code Block (CB) CRC addition, channel coding, rate matching, code block concatenation and the like.
For multiple data transmissions of the transport block, the data for each transmission may be the same or different.
In a preferred embodiment, the scheduling information may be single-time scheduling information or multi-time scheduling information.
And when the scheduling information is single scheduling information, the single scheduling information is used for indicating multiple data transmissions. That is, for multiple data transmissions, there is only one scheduling information, one feedback of the acknowledgement message. As shown in fig. 4, scheduling information indicates N data transmissions, where N is greater than 1.
The single-time scheduling information includes, but is not limited to: combinations of one or more of the following: the number of Transmission times of the Transmission block, Transmission Time Interval (TTI) resources or time slot resources occupied by each data Transmission in the multiple data transmissions, frequency domain resources occupied by each data Transmission, format information corresponding to each data Transmission, Modulation and Coding Scheme (MCS) corresponding to each data Transmission, and resource information indicating that the receiving device feeds back a response message. The format information includes, but is not limited to: code rate of coding, etc.
When the scheduling information is multi-time scheduling information, one-time data transmission corresponds to one-time scheduling information, and any one of the multi-time scheduling information is used for indicating data transmission corresponding to any one of the multi-time scheduling information. As shown in fig. 5, there are N times of data transmission, and there are N pieces of scheduling information, where each piece of scheduling information corresponds to one data transmission and one feedback of a response message. For example, the first scheduling information indicates a first data transmission, the second scheduling information indicates a second data transmission, and so on.
The scheduling information includes, but is not limited to: combinations of one or more of the following: the scheduling information of the first time is transmitted, the scheduling information of the second time is transmitted, the frequency domain resource of the data transmission corresponding to the scheduling information of the first time is transmitted, and the modulation and coding strategy of the data transmission corresponding to the scheduling information of the first time is transmitted. Wherein in the multiple scheduling information, the at least one scheduling information further includes resource information indicating that the receiving device feeds back a response message.
S21, the receiving device receives data transmitted by the transmitting device through multiple data transmissions multiple times based on the received scheduling information.
S22, the receiving device combines the data received multiple times based on the received scheduling information.
Preferably, the sending device receives the data by using a soft information combining method. And the sending equipment performs operations of decoding block cascade, rate de-matching, channel decoding, code block cyclic redundancy check checking, code block cyclic redundancy check removal, transmission block cyclic redundancy check and the like on the data received for multiple times based on the scheduling information to obtain a check result.
And S23, the receiving device checks the merged data to obtain a check result.
Preferably, when the receiving device checks the merged data correctly, the check result is that the transmission block is successfully received. And when the receiving equipment checks the merged data for errors, the checking result is that the transmission block is not successfully received.
And S24, the receiving equipment sends a response message to the sending equipment according to the checking result.
In a preferred embodiment, the sending device sends a response message to the sending device according to the check result and based on the response message feedback channel resource indicated by the scheduling information.
And when the checking result is that the transmission block is successfully received, sending an Acknowledgement (ACK) to the sending equipment. And when the check result indicates that the transmission block is not successfully received, sending a Negative Acknowledgement (NACK) message to the sending equipment.
The invention receives the scheduling information sent by the sending equipment through at least one control channel; receiving data transmitted by the transmitting device through multiple data transmissions multiple times based on the received scheduling information; merging the data received for a plurality of times based on the received scheduling information; verifying the merged data to obtain a verification result; and sending a response message to the sending equipment according to the checking result. The invention only feeds back the response message once for the data transmitted for many times, reduces the processing time delay, saves the time, provides a new data retransmission opportunity, improves the probability of correct demodulation of the data, increases the reliability of the data, and is more suitable for the services with extremely low time delay requirement and extremely high data reliability requirement, such as URLLC (unified resource level control) and the like.
Fig. 7 is a functional block diagram of a data transmission device according to a first preferred embodiment of the present invention. The data transmission device 11 includes a sending module 100, a receiving module 101, and a determining module 102. The module referred to in the present invention refers to a series of computer program segments that can be executed by a processing device of the base station and that can perform a fixed function, and that are stored in a memory device of the base station. In the present embodiment, the functions of the modules will be described in detail in the following embodiments.
The transmitting module 100 transmits the scheduling information to the receiving device through at least one control channel.
In a preferred embodiment, the scheduling information is used to indicate a plurality of data transmissions of data processed for one Transport Block (TB). The transport blocks include, but are not limited to: a Physical Downlink Shared Channel (PDSCH) transport block. Processing of the transport block includes, but is not limited to: the method comprises a series of bit operations such as transmission block Cyclic Redundancy Check (CRC) addition, code block segmentation, Code Block (CB) Cyclic Redundancy Check addition, channel coding, rate matching, code block cascade and the like.
For multiple data transmissions of the same transport block, the data for each transmission may be the same or different.
In a preferred embodiment, the scheduling information may be single-time scheduling information or multi-time scheduling information.
And when the scheduling information is single scheduling information, the single scheduling information is used for indicating multiple data transmissions. That is, for multiple data transmissions, there is only one scheduling information, one feedback of the acknowledgement message. As shown in fig. 4, scheduling information indicates N data transmissions, where N is greater than 1.
The single-time scheduling information includes, but is not limited to: combinations of one or more of the following: the number of Transmission times of the Transmission block, Transmission Time Interval (TTI) resources or time slot resources occupied by each data Transmission in the multiple data transmissions, frequency domain resources occupied by each data Transmission, format information corresponding to each data Transmission, Modulation and Coding Scheme (MCS) corresponding to each data Transmission, and resource information indicating that the receiving device feeds back a response message. The format information includes, but is not limited to: code rate of coding, etc.
When the scheduling information is multi-time scheduling information, one-time data transmission corresponds to one-time scheduling information, and any one of the multi-time scheduling information is used for indicating data transmission corresponding to any one of the multi-time scheduling information. As shown in fig. 5, there are N times of data transmission, and there are N times of scheduling information, where each time of scheduling information corresponds to one time of data transmission and one time of feedback of response message. For example, the first scheduling information indicates a first data transmission, the second scheduling information indicates a second data transmission, and so on.
The scheduling information includes, but is not limited to: combinations of one or more of the following: the scheduling information of the first time is transmitted, the scheduling information of the second time is transmitted, the frequency domain resource of the data transmission corresponding to the scheduling information of the first time is transmitted, and the modulation and coding strategy of the data transmission corresponding to the scheduling information of the first time is transmitted. Wherein in the multiple scheduling information, the at least one scheduling information further includes resource information indicating that the receiving device feeds back a response message.
The sending module 100 performs multiple data transmissions through multiple data channels according to the scheduling information, and transmits data processed by a transmission block to the receiving device.
In a preferred embodiment, when the scheduling information is single-time scheduling information, the scheduling information is sent to the receiving device through a control channel, and the control channel and one of the data channels are in the same transmission time interval. For example, as shown in fig. 4, the control channel carrying the single scheduling information is in the same transmission time interval as the data channel carrying the first data transmission.
In other embodiments, the one control channel and the plurality of data channels may be located in different subframes.
In a preferred embodiment, when the scheduling information is multiple scheduling information, the scheduling information is sent to the receiving device through a plurality of control channels, and in the plurality of control channels, a control channel carrying the scheduling information of any time and a data channel carrying data transmission corresponding to the scheduling information of any time are in the same transmission time interval. For example, as shown in fig. 4, the first-time scheduling information corresponds to a first-time data transmission, and a control channel carrying the first-time scheduling information and a data channel carrying the first-time data transmission are in the same transmission time interval.
In other embodiments, of course, when the scheduling information is multiple times of scheduling information, the control channel carrying the scheduling information of any time and the data channel carrying the data transmission corresponding to the scheduling information of any time are not in the same transmission time interval.
Preferably, when the scheduling information is multiple times of scheduling information, the data channel corresponding to each data transmission in the multiple times of data transmission is adaptively adjusted according to the change of the channel condition. For example, MCS, the number and/or location of Resource Blocks (RBs) in the frequency domain are changed, so that the link adaptive gain can be provided for the signal reception and combination of the receiving device.
When the receiving device merges the data received for multiple times, the receiving module 101 checks the merged data, and then receives a response message fed back by the receiving device according to the check result.
In a preferred embodiment, the sending device performs multiple data transmissions through multiple data channels, and transmits the data after the transmission block processing to the receiving device, so that the receiving device needs to receive the data sent by the sending device through multiple data transmissions according to the received scheduling information, and combine the data received multiple times based on the received scheduling information. And verifying the merged data to obtain a verification result.
Preferably, the sending device receives the data by using a soft information combining method. And the sending equipment performs operations of decoding block cascade, rate de-matching, channel decoding, code block cyclic redundancy check checking, code block cyclic redundancy check removal, transmission block cyclic redundancy check and the like on the data received for multiple times based on the scheduling information to obtain a check result.
Preferably, the sending device sends a response message to the sending device according to the check result and based on the response message feedback channel resource indicated by the scheduling information.
And when the checking result is that the transmission block is successfully received, sending an Acknowledgement (ACK) to the sending equipment. And when the check result indicates that the transmission block is not successfully received, sending a Negative Acknowledgement (NACK) message to the sending equipment.
The receiving module 101 detects on the response message feedback channel and receives the response message.
The determining module 102 determines retransmission of the transport block according to the received response message.
In a preferred embodiment, the determining module 102 stops the retransmission of the transport block when the received acknowledgement message is a positive acknowledgement ACK message.
When the received response message is a negative response NACK message, the determining module 102 performs retransmission scheduling on the transport block, that is, continues to execute the sending module 100, the receiving module 101, and the determining module 102 until a retransmission termination condition is reached.
Preferably, the retransmission termination condition includes, but is not limited to: the receiving device correctly receives the transmission block, and the data transmission times of the transmission block reach the maximum transmission times, and the like.
The invention sends the scheduling information to the receiving device through at least one control channel; according to the scheduling information, performing data transmission for multiple times through a plurality of data channels, and transmitting the data processed by the transmission block to the receiving equipment; when the receiving equipment merges the data received for many times and verifies the merged data, receiving a response message fed back by the receiving equipment according to a verification result; and determining retransmission of the transport block according to the received response message. Therefore, the invention only feeds back the response message once for the data transmitted for many times, reduces the processing time delay, saves the time, provides a new data retransmission opportunity, improves the probability of correct demodulation of the data, increases the reliability of the data, and is more suitable for the services with extremely low time delay requirement and extremely high data reliability requirement.
Fig. 8 is a functional block diagram of a data transmission device according to a second preferred embodiment of the present invention. The data transmission device 21 includes a data receiving module 200, a merging module 201, a checking module 202, and a data sending module 203. The module referred to in the present invention refers to a series of computer program segments that can be executed by a processing device of the base station and that can perform a fixed function, and that are stored in a memory device of the base station. In the present embodiment, the functions of the modules will be described in detail in the following embodiments.
The data receiving module 200 receives scheduling information transmitted by a transmitting device through at least one control channel.
In an embodiment of the present invention, the scheduling information is used to indicate a plurality of data transmissions of data processed for one Transport Block (TB). The transport blocks include, but are not limited to: a Physical Downlink Shared Channel (PDSCH) transport block. Processing of the transport block includes, but is not limited to: the method comprises a series of bit operations such as Cyclic Redundancy Check (CRC) addition, code block segmentation, Code Block (CB) CRC addition, channel coding, rate matching, code block concatenation and the like.
For multiple data transmissions of the transport block, the data for each transmission may be the same or different.
In a preferred embodiment, the scheduling information may be single-time scheduling information or multi-time scheduling information.
And when the scheduling information is single scheduling information, the single scheduling information is used for indicating multiple data transmissions. That is, for multiple data transmissions, there is only one scheduling information, one feedback of the acknowledgement message. As shown in fig. 4, scheduling information indicates N data transmissions, where N is greater than 1.
The single-time scheduling information includes, but is not limited to: combinations of one or more of the following: the number of Transmission times of the Transmission block, Transmission Time Interval (TTI) resources or time slot resources occupied by each data Transmission in the multiple data transmissions, frequency domain resources occupied by each data Transmission, format information corresponding to each data Transmission, Modulation and Coding Scheme (MCS) corresponding to each data Transmission, and resource information indicating that the receiving device feeds back a response message. The format information includes, but is not limited to: code rate of coding, etc.
When the scheduling information is multi-time scheduling information, one-time data transmission corresponds to one-time scheduling information, and any one of the multi-time scheduling information is used for indicating data transmission corresponding to any one of the multi-time scheduling information. As shown in fig. 5, there are N times of data transmission, and there are N pieces of scheduling information, where each piece of scheduling information corresponds to one data transmission and one feedback of a response message. For example, the first scheduling information indicates a first data transmission, the second scheduling information indicates a second data transmission, and so on.
The scheduling information includes, but is not limited to: combinations of one or more of the following: the scheduling information of the first time is transmitted, the scheduling information of the second time is transmitted, the frequency domain resource of the data transmission corresponding to the scheduling information of the first time is transmitted, and the modulation and coding strategy of the data transmission corresponding to the scheduling information of the first time is transmitted. Wherein in the multiple scheduling information, the at least one scheduling information further includes resource information indicating that the receiving device feeds back a response message.
The data receiving module 200 receives data transmitted by the transmitting device through multiple data transmissions multiple times based on the received scheduling information.
The merging module 201 merges the data received multiple times based on the received scheduling information.
Preferably, the combining module 201 receives the data by using a soft information combining method. The merging module 201 performs operations such as decoding block concatenation, rate de-matching, channel decoding, code block cyclic redundancy check checking, code block cyclic redundancy check removal, transmission block cyclic redundancy check and the like on the data received for multiple times based on the scheduling information, and obtains a check result.
The verification module 202 verifies the merged data to obtain a verification result.
Preferably, when the check module 202 checks the merged data correctly, the check result is that the transport block is successfully received. When the check module 202 checks the merged data for errors, the check result is that the transmission block is not successfully received.
The data sending module 203 sends a response message to the sending device according to the checking result.
In a preferred embodiment, the data sending module 203 sends a response message to the sending device according to the check result and based on the response message feedback channel resource indicated by the scheduling information.
When the check result indicates that the transmission block is successfully received, the data sending module 203 sends an Acknowledgement (ACK) to the sending device. When the check result indicates that the transmission block is not successfully received, the data sending module 203 sends a Negative Acknowledgement (NACK) message to the sending device.
The invention receives the scheduling information sent by the sending equipment through at least one control channel; receiving data transmitted by the transmitting device through multiple data transmissions multiple times based on the received scheduling information; merging the data received for a plurality of times based on the received scheduling information; verifying the merged data to obtain a verification result; and sending a response message to the sending equipment according to the checking result. The invention only feeds back the response message once for the data transmitted for many times, reduces the processing time delay, saves the time, provides a new data retransmission opportunity, improves the probability of correct demodulation of the data, increases the reliability of the data, and is more suitable for the services with extremely low time delay requirement and extremely high data reliability requirement, such as URLLC (unified resource level control) and the like.
The integrated unit implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present invention.
As shown in fig. 9, fig. 9 is a schematic structural diagram of a sending device according to a preferred embodiment of the present invention. The transmitting device 2 includes, but is not limited to: a memory 22 and a processor 23. The transmitting device 2 may also comprise other elements.
The transmission apparatus 2 may be a base station apparatus. Of course, in other embodiments, the transmitting device 2 is not limited to a base station. For example, the sending device 2 may also be a network device including, but not limited to, a single network server, a server group consisting of a plurality of network servers, or a Cloud based Computing (Cloud Computing) Cloud consisting of a large number of hosts or network servers, wherein Cloud Computing is one of distributed Computing, a super virtual computer consisting of a collection of loosely coupled computers.
A base station (e.g., access point) can refer to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The base station may be configured to interconvert received air frames and IP packets as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) network. The base station may also coordinate management of attributes for the air interface. For example, the base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a base Station (NodeB) in WCDMA, or an evolved Node B (NodeB or eNB or e-NodeB) in LTE, and the present application is not limited thereto.
The memory 22 is used for storing a program of a data transmission method and various data, and realizes high-speed and automatic access of the program or the data during the operation of the transmitting device 2. The memory 22 may be an external memory and/or an internal memory of the transmitting device 2. Further, the Memory 22 may be a circuit having a Memory function without any physical form in the integrated circuit, such as a RAM (Random-Access Memory), a FIFO (First InFirst Out), and the like. Alternatively, the memory 22 may be a memory in a physical form, such as a memory stick, a TF Card (Trans-flash Card), or the like.
The processor 23 is also called a Central Processing Unit (CPU), and is an ultra-large scale integrated circuit, which is an operation Core (Core) and a Control Core (Control Unit) of the sending device 2. The processor 23 may execute an operating system of the transmitting device 2 as well as various installed application programs, program codes, etc., such as the data transmission means 11.
With reference to fig. 3, the memory 22 of the transmitting device 2 stores a plurality of instructions to implement a data transmission method, and the processor 23 executes the plurality of instructions to implement: transmitting the scheduling information to the receiving device through at least one control channel; according to the scheduling information, performing data transmission for multiple times through a plurality of data channels, and transmitting the data processed by the transmission block to the receiving equipment; when the receiving equipment merges the data received for many times and verifies the merged data, receiving a response message fed back by the receiving equipment according to a verification result; and determining retransmission of the transport block according to the received response message.
According to the preferred embodiment of the present invention, the scheduling information is single scheduling information or multiple scheduling information;
when the scheduling information is single scheduling information, the single scheduling information is used for indicating the multiple data transmissions;
when the scheduling information is multi-time scheduling information, one-time data transmission corresponds to one-time scheduling information, and any one of the multi-time scheduling information is used for indicating data transmission corresponding to any one of the multi-time scheduling information.
According to the preferred embodiment of the present invention, when the scheduling information is single scheduling information, the scheduling information is sent to the receiving device through a control channel, and the control channel and one of the data channels are in the same transmission time interval; or
The one control channel is located in a different subframe than the plurality of data channels.
According to the preferred embodiment of the present invention, when the scheduling information is multiple scheduling information, the scheduling information is sent to the receiving device through a plurality of control channels, and in the plurality of control channels, a control channel carrying the scheduling information of any time and a data channel carrying data transmission corresponding to the scheduling information of any time are in the same transmission time interval; or
The control channel carrying the scheduling information of any time and the data channel carrying the data transmission corresponding to the scheduling information of any time are not in the same transmission time interval.
According to a preferred embodiment of the present invention, the plurality of instructions executed by the processor 23 further includes:
and when the scheduling information is multi-time scheduling information, adaptively adjusting and bearing a data channel corresponding to each data transmission in the multi-time data transmission according to the change of the channel condition.
According to a preferred embodiment of the present invention, said determining retransmission of said transport block according to the received acknowledgement message comprises:
stopping retransmission of the transport block when the received acknowledgement message is a positive acknowledgement, ACK, message;
and when the received response message is a negative response (NACK) message, performing retransmission scheduling on the transmission block until a retransmission termination condition is reached.
As shown in fig. 10, fig. 10 is a schematic structural diagram of a terminal device according to a preferred embodiment of the data transmission method of the present invention. The receiving apparatus 1 includes, but is not limited to: a storage device 12 and a processing device 13. The receiving device 1 may also comprise other elements.
The receiving device 1 is a device capable of automatically performing numerical calculation and/or information processing according to a preset or stored instruction, and the hardware includes, but is not limited to, a microprocessor, an Application Specific Integrated Circuit (ASIC), a Programmable Gate Array (FPGA), a Digital Signal Processor (DSP), an embedded device, and the like.
The receiving device 1 may be a terminal device, which may be a wireless terminal or a wired terminal, and the wireless terminal may be a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or another 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 (e.g., RAN). For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) 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 (RemoteStation), an Access Point (Access Point), 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).
The storage device 12 is used for storing a program of a data transmission method and various data, and realizes high-speed and automatic access of the program or the data in the operation process of the receiving device 1. The storage device 12 may be an external memory and/or an internal memory of the receiving device 1. Further, the storage device 12 may be a circuit with a storage function, which is not In a physical form In an integrated circuit, such as a RAM (Random-Access Memory), a FIFO (First In First Out), and the like. Alternatively, the storage device 12 may be a memory having a physical form, such as a memory stick, a TF Card (Trans-flash Card), and the like.
The Processing device 13 is also called a Central Processing Unit (CPU), and is an ultra-large scale integrated circuit, which is an operation Core (Core) and a Control Core (Control Unit) of the receiving device 1. The processing device 13 may execute an operating system of the receiving device 1 as well as various types of installed application programs, program codes, etc., such as the data transmission means 21.
With reference to fig. 6, the storage device 12 in the receiving device 1 stores a plurality of instructions to implement a data transmission method, and the processing device 13 can execute the plurality of instructions to implement: receiving scheduling information sent by sending equipment through at least one control channel; receiving data transmitted by the transmitting device through multiple data transmissions multiple times based on the received scheduling information; merging the data received for a plurality of times based on the received scheduling information; verifying the merged data to obtain a verification result; and sending a response message to the sending equipment according to the checking result.
According to a preferred embodiment of the present invention, the plurality of instructions executed by the processing device 13 further comprises:
when the check result is that the transmission block is successfully received, sending an Acknowledgement (ACK) message to the sending equipment;
and when the checking result is that the transmission block is not successfully received, sending a Negative Acknowledgement (NACK) message to the sending equipment.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is only one logical functional division, and other divisions may be realized in practice.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional module.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims shall not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the system claims may also be implemented by one unit or means in software or hardware. The terms second, etc. are used to denote names, but not any particular order.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. A data transmission method applied to a sending device, the method comprising:
sending multiple times of scheduling information to receiving equipment through a plurality of control channels, wherein any time of scheduling information in the multiple times of scheduling information is used for indicating data transmission corresponding to any time of scheduling information, and one time of data transmission corresponds to one time of scheduling information;
adaptively adjusting and bearing a data channel corresponding to each data transmission in the multiple data transmissions according to the change of the channel condition, performing multiple data transmissions through the adjusted multiple data channels according to the multiple scheduling information, and transmitting the data processed by the transmission block to the receiving equipment;
when the receiving equipment combines the data received for multiple times and verifies the combined data, receiving a response message fed back by the receiving equipment according to a verification result;
and determining retransmission of the transport block according to the received response message.
2. The data transmission method according to claim 1, wherein, in the plurality of control channels, a control channel carrying the any scheduling information and a data channel carrying data transmission corresponding to the any scheduling information are in a same transmission time interval; or
The control channel carrying the scheduling information of any time and the data channel carrying the data transmission corresponding to the scheduling information of any time are not in the same transmission time interval.
3. The data transmission method according to claim 1 or 2, wherein said determining retransmission of the transport block based on the received acknowledgement message comprises:
stopping retransmission of the transport block when the received acknowledgement message is a positive acknowledgement, ACK, message; or
And when the received response message is a negative response (NACK) message, performing retransmission scheduling on the transmission block until a retransmission termination condition is reached.
4. A data transmission method applied to a receiving device is characterized by comprising the following steps:
receiving multiple times of scheduling information sent by sending equipment through a plurality of control channels, wherein any time of scheduling information in the multiple times of scheduling information is used for indicating data transmission corresponding to any time of scheduling information, and one time of data transmission corresponds to one time of scheduling information;
based on the received multiple scheduling information, adaptively adjusting and bearing a data channel corresponding to each data transmission in the multiple data transmissions according to the change of the channel condition, and receiving data transmitted by the multiple data transmissions performed by the transmitting equipment through the adjusted multiple data channels;
merging the data received for a plurality of times based on the received scheduling information;
verifying the merged data to obtain a verification result;
and sending a response message to the sending equipment according to the checking result.
5. The data transmission method according to claim 4, wherein the sending the response message to the sending device according to the check result comprises:
when the check result is that the transmission block is successfully received, sending an Acknowledgement (ACK) message to the sending equipment;
and when the checking result is that the transmission block is not successfully received, sending a Negative Acknowledgement (NACK) message to the sending equipment.
6. A transmitting device, comprising a memory for storing at least one instruction and a processor for executing the at least one instruction to implement the data transmission method of any one of claims 1 to 3.
7. A receiving device, comprising a storage device for storing at least one instruction and a processing device for executing the at least one instruction to implement the data transmission method according to any one of claims 4 or 5.
8. A computer-readable storage medium storing at least one instruction which, when executed by a processor, implements a data transfer method comprising the data transfer method of any one of claims 1 to 3, and/or the data transfer method of any one of claims 4 or 5.
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| CN110971365A (en) * | 2018-09-28 | 2020-04-07 | 北京展讯高科通信技术有限公司 | Method, device and terminal for receiving and transmitting signaling and data for multiple times |
| WO2020107294A1 (en) * | 2018-11-28 | 2020-06-04 | Oppo广东移动通信有限公司 | Data transmission method, device, and terminal |
| MX2021002247A (en) | 2018-11-28 | 2021-05-27 | Guangdong Oppo Mobile Telecommunications Corp Ltd | Data transmission method and device, and terminal. |
| CN113692761B (en) * | 2019-03-29 | 2024-06-07 | 华为技术有限公司 | Data transmission method and device |
| CN110278614B (en) * | 2019-06-24 | 2020-12-18 | 西安理工大学 | Data channel transmission method and device |
| CN110493339B (en) * | 2019-08-20 | 2022-02-25 | 曾亮 | Distributed remote storage management method, system and device |
| CN116964971A (en) * | 2021-01-14 | 2023-10-27 | 捷开通讯(深圳)有限公司 | Communication method for improving MBS service transmission reliability |
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| CN102938691A (en) * | 2011-08-15 | 2013-02-20 | 北京三星通信技术研究有限公司 | Method for back feeding acknowledgement (ACK)/non acknowledgement (NACK) in wireless communication system |
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