WO2020220962A1

WO2020220962A1 - Sidelink transmission method and terminal

Info

Publication number: WO2020220962A1
Application number: PCT/CN2020/083920
Authority: WO
Inventors: 王达; 赵亚利
Original assignee: 大唐移动通信设备有限公司
Priority date: 2019-04-28
Filing date: 2020-04-09
Publication date: 2020-11-05
Also published as: CN111865480A; CN111865480B

Abstract

Provided are a sidelink transmission method and a terminal. The method comprises: a first terminal determining, according to a feedback result, that the the transmission of first information is to be carried out N times, wherein the feedback result is a feedback result regarding a second terminal making feedback on information sent by the first terminal to the second terminal on a sidelink, and N is a positive integer greater than or equal to one; and the first terminal transmitting the first information to the second terminal on the sidelink N times.

Description

Direct link transmission method and terminal

Cross references to related applications

This application claims the priority of Chinese Patent Application No. 201910351861.7 filed in China on April 28, 2019, the entire content of which is incorporated herein by reference.

Technical field

The present disclosure relates to the field of communication technology, and in particular to a direct link transmission method and terminal.

Background technique

The New Radio (NR) vehicle to everything (V2X) technology has introduced a unicast communication mode and a multicast communication mode in addition to the original broadcast communication mode. Since the broadcast communication mode does not require feedback, feedback is currently not supported in the NR V2X technology. Because there is no feedback in this way, the transmission reliability of the sidelink is relatively poor.

Summary of the invention

The embodiments of the present disclosure provide a direct link transmission method and terminal to solve the problem of poor transmission reliability of the direct link.

The embodiment of the present disclosure provides a direct link transmission method, including:

According to the feedback result, the first terminal determines that the first information is to be transmitted N times, where the feedback result is the feedback result of the second terminal's feedback on the information sent by the first terminal to the second terminal on the through link , N is a positive integer greater than or equal to 1;

The first terminal transmits the first information to the second terminal N times on the through link.

Optionally, the feedback result includes at least one of the following:

A feedback result for the first information;

Feedback results of other information sent by the first terminal to the second terminal on the through link;

A feedback result of the first information and other information sent by the first terminal to the second terminal on the through link.

Optionally, the first terminal determines that the first information is to be transmitted N times according to the feedback result, including:

If the first terminal receives M NACKs, it is determined that the first information is transmitted N times; or

If the sum of the number of times that the first terminal receives NACK and the number of times that the feedback information is not received reaches M, it is determined that the first information is transmitted N times; or

If the number of times that the first terminal does not receive the feedback information reaches M times, it is determined that the first information is transmitted N times;

Wherein, the N is a positive integer greater than 1, and the M is a positive integer greater than or equal to 1.

Optionally, at least one of the M and the N is agreed by a protocol, pre-configured or configured by a network device.

Optionally, the method further includes:

In the case that the first terminal receives the NACK fed back by the second terminal for the first information or does not receive the feedback information, if the sum of the number of NACKs and the number of times that the feedback information is not received does not reach M, M NACKs are received or feedback information is not received for M times, then the first information is transmitted to the second terminal once on the through link;

The first terminal transmitting the first information to the second terminal N times on the through link includes:

In the case that the first terminal receives the NACK fed back by the second terminal for the first information or does not receive the feedback information, if the sum of the number of NACKs and the number of times that the feedback information is not received reaches M, the received If the number of times of NACKs or no feedback information received reaches M times, the first terminal transmits the first information to the second terminal N times on the through link.

Optionally, the value of N is a protocol agreement, a network device is configured for the second terminal or the second terminal is preconfigured, and the resource position occupied by the first information transmission N times is determined by the first information A terminal or a network device instructs the second terminal; or

The value of N and/or the resource location occupied by the first information transmission N times are indicated to the second terminal by the first terminal or the network device.

Optionally, at least one of the value of N and the resource location is indicated to the second terminal when it is determined that the first information is transmitted N times; or

At least one of the value of N and the resource location is indicated to the second terminal before transmitting the first information.

Optionally, the first terminal indicates through direct link control information SCI or direct link RRC signaling; or

The network equipment is instructed by broadcast message or RRC signaling.

Optionally, the RV number of the redundancy version of the first information transmitted each time in the first information transmitted N times is the same or different; or

The RV number for each transmission of the first information in the first information transmitted N times is a protocol agreement or network device configuration or pre-configuration.

Optionally, during the transmission of the first information, the value of N does not change; or

During the transmission of the first information, the value of N is variable.

Optionally, when the value of N is variable:

During the transmission of the first information, if it is necessary to retransmit the first information multiple times to the second terminal, the value of N increases as the number of retransmissions increases. The retransmission of the first information refers to transmitting the first information N times.

Optionally, during the transmission of the first information, the value range of N is a value in the set of N values, and the value of N is increased to the maximum value of the set of N values After the value, the value of N remains unchanged.

Optionally, the determining that the first information is transmitted N times includes:

If the link information of the through link meets a preset condition, determining that the first information is transmitted N times;

Wherein, the N is a positive integer greater than 1, and the link information includes link status and/or link service information.

Optionally, the sum of the number of times that the first terminal receives NACKs and the number of times that the feedback information is not received reaches M, the number of times the first terminal receives M NACKs, or the first terminal does not receive feedback information In the case of reaching M times, if the link information of the through link does not meet the preset condition, it is determined that the first information is transmitted once.

Optionally, in a case where the second terminal is a terminal, the link information of the through link meeting a preset condition refers to at least one of the following:

The channel state of the through link is lower than the channel state threshold;

The channel congestion of the through link is lower than the channel congestion threshold;

The service quality QoS of the direct link service is higher than the service QoS threshold;

or,

In the case where the second terminal is multiple terminals, the link information of the through link meeting a preset condition refers to at least one of the following:

The proportion of the channel state of the through link being lower than the channel state threshold is higher than the first proportion threshold;

The proportion of the direct link channel congestion degree lower than the channel congestion threshold is higher than the second proportion threshold;

The direct link service QoS is higher than the service QoS threshold.

Optionally, the QoS includes at least one of the following:

Reliability, delay, priority and communication range.

Optionally, in a case where the second terminal is a terminal, the link information of the through link meeting a preset condition refers to:

The direct link service QoS is higher than the service QoS threshold; or

In the case that the direct link service QoS is not higher than the service QoS threshold, the channel congestion degree of the direct link is lower than the channel congestion threshold;

or,

In the case where the second terminal is multiple terminals, the link information of the through link meeting a preset condition refers to:

The direct link service QoS is higher than the service QoS threshold; or

In the case that the direct link service QoS is not higher than the service QoS threshold, the proportion of the direct link channel congestion degree lower than the channel congestion threshold is higher than the second proportion threshold.

Optionally, the second terminal is multiple terminals, and the first terminal determines that the first information is to be transmitted N times according to the feedback result, including:

If the proportion of M feedback results is higher than the third proportion threshold, it is determined that the first information is transmitted N times, where the proportion refers to the proportion of the number of received NACKs divided by the number of terminals of the second terminal , Or, the ratio refers to the ratio of the number of NACKs received and the number of non-received feedback information divided by the number of the second terminal, or the ratio refers to the number of non-received feedback information divided by the second terminal The ratio of the quantity, wherein the M is a positive integer greater than or equal to 1.

Optionally, the second terminal only feeds back NACK or ACK once for the N transmissions of the first information.

Optionally, the first terminal indicates the RV version number of the currently transmitted information to the second terminal through the direct link SCI or the direct link RRC signaling.

An embodiment of the present disclosure also provides a terminal, where the terminal is a first terminal and includes:

The determining module is configured to determine the first information to be transmitted N times according to the feedback result, where the feedback result is that the second terminal feeds back the information sent by the first terminal to the second terminal on the through link Feedback result, N is a positive integer greater than or equal to 1;

The first transmission module is configured to transmit the first information to the second terminal N times on the direct link.

Optionally, the feedback result includes at least one of the following:

Feedback result for the first information;

Optionally, the determining module is configured to determine that the first information is transmitted N times if the first terminal receives M NACKs; or

The determining module is configured to determine that the first information is transmitted for N times if the sum of the number of times that the first terminal receives NACK and the number of times that the feedback information is not received reaches M; or

The determining module is configured to determine that the first information is transmitted N times if the number of times that the first terminal does not receive the feedback information reaches M times;

Optionally, the terminal further includes:

The second transmission module is configured to, when the first terminal receives the NACK fed back by the second terminal for the first information or the feedback information is not received, if the number of NACKs and the number of times that the feedback information is not received If the sum does not reach M, M NACKs are not received, or the number of times that feedback information is not received does not reach M, the first information is transmitted to the second terminal once on the through link;

The first transmission module is configured to, when the first terminal receives the NACK fed back by the second terminal for the first information or does not receive the feedback information, if the number of NACKs and the number of feedback information are not received When the sum of the times reaches M, the number of times that NACKs are received for M times, or the feedback information is not received reaches M times, the first information is transmitted to the second terminal N times on the through link.

Optionally, the determining module is configured to: when the sum of the number of times that the first terminal receives NACK and the number of times that the feedback information is not received reaches M, the first terminal receives M times of NACK, or the first terminal does not When the number of times the feedback information is received reaches M times, if the link information of the through link meets a preset condition, it is determined that the first information is transmitted N times;

The embodiment of the present disclosure also provides a terminal, where the terminal is a first terminal and includes: a transceiver, a memory, a processor, and a program stored in the memory and running on the processor,

The processor is configured to determine, according to the feedback result, that the first information is to be transmitted N times, where the feedback result is that the second terminal performs the transmission of the information sent by the first terminal to the second terminal on the through link The feedback result of the feedback, N is a positive integer greater than or equal to 1;

The transceiver is configured to transmit the first information to the second terminal N times on the direct link;

or,

The transceiver is configured to determine, according to the feedback result, that the first information is to be transmitted N times, where the feedback result is that the second terminal performs the transmission of the information sent by the first terminal to the second terminal on the direct link The feedback result of the feedback, N is a positive integer greater than or equal to 1;

The transceiver is further configured to transmit the first information to the second terminal N times on the direct link.

Optionally, the feedback result includes at least one of the following:

Feedback result for the first information;

And a feedback result of the first information and other information sent by the first terminal to the second terminal on the through link.

Optionally, the transceiver is further configured to: in the case that the first terminal receives the NACK fed back by the second terminal for the first information or does not receive the feedback information, if the number of NACKs and the non-receive If the sum of the times of the feedback information does not reach M, the NACK is not received M times, or the times the feedback information is not received does not reach M times, the first transmission is transmitted to the second terminal on the direct link. One information;

The transmitting the first information to the second terminal N times on the through link includes:

In the case that the first terminal receives the NACK fed back by the second terminal for the first information or does not receive the feedback information, if the sum of the number of NACKs and the number of times that the feedback information is not received reaches M, the received If the number of times of NACKs or no feedback information is received reaches M times, the first information is transmitted to the second terminal N times on the through link.

During the transmission of the first information, the value of N is variable.

Optionally, the sum of the number of times that the first terminal receives NACKs and the number of times that the feedback information is not received reaches M, the number of times the first terminal receives M NACKs, or the first terminal does not receive feedback information In the case of reaching M times, if the link state of the through link does not meet the preset condition, it is determined that the first information is transmitted once.

The embodiment of the present disclosure also provides a computer-readable storage medium on which a computer program is stored, characterized in that, when the program is executed by a processor, the steps in the through link transmission method provided by the embodiment of the present disclosure are implemented.

In the embodiment of the present disclosure, the first terminal determines that the first information is to be transmitted N times according to the feedback result, where the feedback result is the information sent by the second terminal to the second terminal on the direct link for the first terminal The feedback result of information feedback, N is a positive integer greater than or equal to 1, and the first terminal transmits the first information to the second terminal N times on the through link. In this way, feedback can be performed on the through link, and the first information is determined to be transmitted N times according to the feedback result, thereby improving the transmission reliability of the through link.

Description of the drawings

Figure 1 is a schematic diagram of a network structure applicable to an embodiment of the present disclosure;

2 is a flowchart of a direct link transmission method provided by an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of another direct link transmission method provided by an embodiment of the present disclosure;

4 is a schematic diagram of another through link transmission method provided by an embodiment of the present disclosure;

Figure 5 is a structural diagram of a terminal provided by an embodiment of the present disclosure;

Figure 6 is a structural diagram of another terminal provided by an embodiment of the present disclosure;

Fig. 7 is a structural diagram of another terminal provided by an embodiment of the present disclosure.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present disclosure clearer, a detailed description will be given below with reference to the drawings and specific embodiments.

Referring to FIG. 1, FIG. 1 is a schematic diagram of a network structure applicable to an embodiment of the present disclosure. As shown in FIG. 1, it includes multiple terminals 11 and network equipment 12. The terminal 11 may be a User Equipment (UE) or other Terminal equipment, such as: mobile phones, tablet computers (Tablet Personal Computer), laptop computers (Laptop Computer), personal digital assistants (Personal Digital Assistant, PDA), mobile Internet devices (Mobile Internet Device, MID), wearable devices (Wearable Device), robots, in-vehicle terminals, vehicles and other terminal-side devices, it should be noted that the specific types of terminals are not limited in the embodiments of the present disclosure. The direct link that can directly communicate between the terminals 11 is called Sidelink (translated as a direct communication link or bypass, also called a direct communication interface or a direct link interface), that is, the terminals can communicate directly through Sidelink. The terminals for direct communication may all be on the network or all off the network, or some devices may be on the network and some devices may be off the network. The network equipment 12 may be a base station, such as a macro station, LTE eNB, 5G NR NB, etc.; the network equipment may also be a small station, such as a low power node (LPN), pico, femto, etc., or network equipment It can be an access point (Access Point, AP); a base station can also be a network node composed of a central unit (Central Unit, CU) and multiple transmission reception points (Transmission Reception Point, TRP) managed and controlled by the central unit. The cellular communication link between the communicating terminal side devices is called a device to network (D2N) link, or Uu interface. It should be noted that the specific types of network devices are not limited in the embodiments of the present disclosure.

It should be noted that the embodiments of the present disclosure can be applied to NR V2X networks, and can also be applied to other networks that use a through link for communication, which is not limited by the embodiments of the present disclosure.

Please refer to FIG. 2. FIG. 2 is a flowchart of a direct link transmission method provided by an embodiment of the present disclosure. As shown in FIG. 2, it includes the following steps:

201. The first terminal determines, according to the feedback result, that the first information is to be transmitted N times, where the feedback result is that the second terminal feeds back the information sent by the first terminal to the second terminal on the through link Feedback result, N is a positive integer greater than or equal to 1;

202. The first terminal transmits the first information to the second terminal N times on the through link.

Wherein, the above feedback result may indicate the feedback situation of the through link, specifically it may be the feedback result of the above first information, it may also be the feedback result of other information, or it may be the feedback result of the first information and other information . For example: the above feedback result may include at least one of the following:

A feedback result for the first information;

It should be noted that the foregoing other information may refer to information other than the foregoing first information sent by the foregoing first terminal to the foregoing second terminal.

Further, the above feedback result may include at least one of Negative-Acknowledgment (NACK) and Acknowledgment (ACK), and may also be a feedback result of not receiving feedback information, that is, the feedback result is non-continuous Transmission (Discontinuous Transmission, DTX).

The foregoing determining that the first information is transmitted for N times according to the feedback result may be that the foregoing feedback result indicates that the foregoing direct link packet loss rate is relatively high, or multiple NACKs are received, or feedback information is not received multiple times, or multiple transmissions are received. If the NACK is not received multiple times, or the ratio of received ACK to NACK is relatively low, it is determined that the first information is transmitted multiple times, that is, the value of N is an integer greater than 1, and vice versa. One message is transmitted once, that is, the value of N is 1.

It should be noted that the value of N may be pre-configured, for example: it is pre-configured as an integer greater than 1, or the value of N may be determined according to the feedback result. In addition, the value of N can be a value or a value set.

In addition, the foregoing determining that the first information is to be transmitted N times may be determining that the first information is to be transmitted N times in one transmission process, that is, when N is an integer greater than 1, it is determined that N repeated transmissions are performed. For example: the first information is transmitted N times in one retransmission.

According to the feedback result, the first terminal determines that the first information is to be transmitted N times, which can also be understood as determining the number N of times the first information transmits the first information on the through link according to the feedback result.

The foregoing first terminal transmitting the first information to the second terminal N times on the through link may be: transmitting the first information N times in one transmission process, for example: continuously transmitting N in one retransmission The first information.

In the embodiment of the present disclosure, the first terminal sends the first information to the second terminal, and may receive the feedback result of the first information sent by the second terminal. When the feedback result of the first information is NACK or the feedback information is not received, The first terminal retransmits the first information to the second terminal. If the retransmission occurs after step 201, then the retransmission is to transmit the first information N times.

It should be noted that the foregoing second terminal may be one or more terminals, that is, the embodiments of the present disclosure may be applied to unicast and multicast scenarios. For example, for a multicast scenario, the second terminal may be multiple receiving terminals in the group, and for a unicast scenario, the second terminal is one receiving terminal.

In the embodiments of the present disclosure, through the above steps, the first terminal can determine the number of times N the first terminal transmits the first information on the direct link according to the feedback of the information transmitted on the direct link, thereby improving the transmission of the direct link. reliability.

As an optional implementation manner, the first terminal determines the first information to be transmitted N times according to the feedback result, including:

Wherein, the M times of NACK feedback received above may be M times of NACK feedback received continuously, or M times of NACK feedback received discontinuously, and the M times of NACK feedback may be feedback for different transmission information.

The foregoing unreceived feedback information may be continuous unreceived feedback information, or discontinuous unreceived feedback information, and these unreceived feedback information may be feedbacks for different transmission information.

In this embodiment, since M NACK feedback is received, or if the sum of the number of times the first terminal receives NACK and the number of times the feedback information is not received reaches M, or the first terminal does not receive feedback information, The number of times reaches M, which may indicate that the state of the through link between the first terminal and the second terminal is poor, and thus it is determined that the first information is transmitted N times to improve the transmission reliability of the through link.

Wherein, at least one of the foregoing M and the N may be agreed upon by a protocol (also referred to as a standard specification), pre-configured or configured by a network device. Among them, the foregoing network device configuration may be configured through system broadcast messages (System Information Block, SIB), radio resource control (Radio Resource Control, RRC) dedicated signaling, or downlink control information (downlink control information, DCI). The configuration may be pre-configured by the network device or the first terminal.

Optionally, the method further includes:

Wherein, when the first terminal receives the NACK that the second terminal feeds back for the first information or does not receive the feedback information, it may be that when the first terminal receives the second terminal for the first information NACK fed back by the first information, or no feedback information from the second terminal for the first information is received.

It should be noted that if the first terminal receives the NACK that the second terminal feeds back on the first information or does not receive the feedback information, the first terminal sends the feedback to the The second terminal may transmit the first information N times after receiving the above M NACKs, or, if the sum of the number of times the first terminal receives the NACK and the number of times the feedback information is not received reaches M, or the When the first terminal has not received the feedback information for M times, it is determined that the first information is transmitted N times, and the NACK for the first information feedback is received or the feedback information for the first information is not received, The first terminal transmits the first information to the second terminal N times on the through link. That is, the foregoing M NACKs may include receiving the foregoing NACK for the first information feedback, or M NACKs have been received before the foregoing NACK for the first information feedback is received. The feedback information that has not been received M times may include the feedback information that has not been received for the first information, or the feedback information that has not been received for M times before the feedback information that has not been received for the first information, or that The sum of the number of times that a terminal receives NACK and the number of times that no feedback information is not received reaches M.

In this embodiment, when the above NACK is received or the feedback information is not received, if the sum of the number of NACKs and the number of times that the feedback information is not received does not reach M, M NACKs are not received, or the feedback information is not received When the number of times does not reach M times, only the first information is transmitted once during retransmission. If the above NACK is received or the feedback information is not received, the M-th NACK feedback is received, if the sum of the number of times the first terminal receives the NACK and the number of times the feedback information is not received reaches M, or if the After the first terminal has not received the feedback information for M times, when retransmitting the first information, the first information is continuously transmitted N times, so as to improve the transmission reliability of the through link.

That is to say, in the embodiment of the present disclosure, the first information can be determined to be transmitted N times according to the foregoing link information.

For example: if the first terminal receives M NACKs, or if the sum of the number of times the first terminal receives NACKs and the number of times the feedback information is not received reaches M, the first terminal does not receive the feedback information. When the number of times reaches M, and the link information of the through link meets a preset condition, it is determined that the first information is transmitted N times.

Wherein, the above-mentioned preset conditions may be protocol agreement, pre-configuration or network device configuration.

In this implementation manner, it can be realized that only when the link information of the through link meets a preset condition, the first information is determined to be transmitted N times, so as to improve the transmission performance of the through link.

Further, the sum of the number of times that the first terminal receives NACKs and the number of times that the feedback information is not received reaches M, the number of times the first terminal receives M NACKs, or the number of times that the first terminal does not receive feedback information reaches In the case of M times, if the link information of the through link does not meet the preset condition, it is determined that the first information is transmitted once.

In this way, it is possible to avoid performing N transmissions when the above-mentioned preset conditions are not met, so as to avoid communication congestion or cause unnecessary transmissions, so as to improve the transmission performance of the through link.

The service quality (Quality of Service, QoS) of the direct link service is higher than the service QoS threshold.

It should be noted that the above-mentioned meeting the preset condition means that at least one of the above can be understood as, in one case, if any one of the above three items is satisfied, the above-mentioned preset condition is considered to be satisfied, and in another case, If at least two of the above three items are met, it is considered that the above preset conditions are met.

For example: in the case where the second terminal is a terminal, the link information of the above-mentioned through link meeting the preset condition may mean:

The direct link service QoS is higher than the service QoS threshold; or

In the case that the direct link service QoS is not higher than the service QoS threshold, the direct link channel congestion degree is lower than the channel congestion threshold.

That is, when the QoS is higher than the service QoS threshold, the channel congestion degree of the direct link is not considered, but when the direct link service QoS is not higher than the service QoS threshold, if the direct link channel congestion degree is lower than the channel congestion threshold, it is satisfied The above-mentioned preset conditions are determined to perform N transmissions.

In addition, in one case, the aforementioned failure to meet the aforementioned preset condition may be that the channel state of the through link is not lower than the channel state threshold, or the channel congestion degree of the through link is not lower than the channel congestion threshold, or the through link The business service quality QoS is not higher than the business QoS threshold. In another case, the foregoing failure to meet the foregoing preset conditions may be that the channel state of the direct link is not lower than the channel state threshold, or the channel congestion degree of the direct link is not lower than the channel congestion threshold and the service QoS is not higher than the service QoS. Threshold. Or in another case, failure to meet the preset conditions may mean that the channel state of the through link is not lower than the channel state threshold, the channel congestion degree of the link is not lower than the channel congestion threshold, and the service QoS is not higher than the service QoS threshold. At least two of the are established.

It should be noted that the above three items do not limit the need to exist at the same time. For example, in some solutions, only the direct link channel state, the direct link channel congestion degree or the direct link service QoS are considered.

Among them, the above-mentioned direct link channel state may be channel state information (Channel State Information CSI), rank indication (Rank Indication, RI), channel quality indicator (Channel Quality Indicator, CQI), signal to interference plus noise ratio (Signal to Interference) plus Noise Ratio, SINR) or Reference Signal Receiving Power (RSRP) and other channel states.

The aforementioned channel state threshold may be a channel state threshold such as a CSI threshold, an RI threshold, a CQI threshold, an SINR threshold, or an RSRP threshold.

In this implementation manner, judgment can be made according to the channel state threshold of the through link. For example, if the channel state of the through link is higher than the corresponding threshold, indicating that the channel state is good, when the first terminal receives the M-th NACK feedback After that, each time the first information is retransmitted, the first information is only retransmitted once, thereby reducing transmission overhead; if the channel state of the through link is lower than the corresponding threshold, it indicates that the channel state is poor, and when the first terminal is in After receiving the M-th NACK feedback, each time the first information is retransmitted, the first information is transmitted N times, so as to improve transmission reliability.

The foregoing direct link channel congestion degree may be a channel busy ratio (Channel Busy Ratio, CBR) threshold or a channel occupancy ratio (Channel occupancy ratio, CR), etc. Then, the foregoing channel congestion threshold may be a CBR threshold or a CR threshold.

In this implementation manner, judgment can be made according to the congestion threshold of the direct link channel. For example, if the congestion level of the direct link channel is higher than the corresponding threshold, indicating that the channel is congested, then when the first terminal receives the Mth NACK feedback After that, each time the first message is retransmitted, the first message is only retransmitted once; because the channel is already relatively congested, there are not many resources available, so as to avoid occupying more transmission resources and avoid the possibility of not being selected for transmission. Errors caused by resource conditions; another example: if the congestion level of the direct link channel is lower than the corresponding threshold, it indicates that the channel is not congested, that is, channel resources are relatively abundant, then when the first terminal receives the Mth NACK feedback, Each time the first information is retransmitted, the first information is transmitted N times, thereby increasing the reception success rate.

The foregoing QoS may include at least one of the following:

Reliability, delay, priority and communication range.

The foregoing service QoS threshold may be at least one of a reliability threshold, a delay threshold, a priority threshold, and a communication range threshold.

In this implementation manner, it is possible to realize the judgment based on the QoS threshold of the direct link service. For example, if the QoS of the direct link service is higher than the reliability threshold, it indicates that the reliability of the service requirement is higher or the delay is higher than the delay. Threshold, indicating that the business requires a higher delay, or the priority is higher than the priority threshold, indicating that the priority of the business request is higher, or the communication range is higher than the communication range threshold, indicating that the required communication range is far, and multiple transmissions are required When the transmission distance is reached, after receiving the M-th NACK feedback, the first terminal transmits the first information N times each time it retransmits the first information, thereby increasing the reception success rate and reducing the transmission delay; : If the QoS of the direct link service, for example, the reliability is lower than the reliability threshold, it indicates that the reliability of the service requirement is not high, or the delay is lower than the delay threshold, indicating that the service requires a lower delay or the priority is lower than the priority Threshold, indicating that the priority of the service requirement is low, or the communication range is lower than the communication range threshold, indicating that the required communication range is relatively close, then the first terminal will retransmit the first information each time after receiving the M-th NACK feedback At this time, the first information is only retransmitted once, thereby reducing transmission overhead.

Optionally, when the second terminal is a plurality of terminals, the link information of the through link meeting a preset condition refers to at least one of the following:

The direct link service QoS is higher than the service QoS threshold.

Among them, the above-mentioned direct link channel state, direct link channel congestion degree, direct link service QoS, and corresponding thresholds can be referred to the relevant description of the foregoing embodiment, which will not be repeated here.

The ratio of the direct link channel state below the channel state threshold being higher than the first proportion threshold may be that the proportion of the terminals whose direct link channel state is lower than the channel state threshold among the multiple terminals is higher than The first proportional threshold, the above-mentioned direct link channel congestion degree is lower than the channel congestion threshold and the proportion is higher than the second proportional threshold. It may be that among the above-mentioned multiple terminals, the direct link channel congestion degree is lower than the channel congestion threshold. The proportion of terminals is higher than the second proportion threshold.

For example: in a case where the second terminal is multiple terminals, the link information of the above-mentioned through link meeting the preset condition may mean:

The direct link service QoS is higher than the service QoS threshold; or

That is, when the QoS is higher than the service QoS threshold, the channel congestion of the direct link is not considered, but when the direct link service QoS is not higher than the service QoS threshold, if the direct link channel congestion is lower than the channel congestion threshold The ratio satisfies the above-mentioned preset condition to determine N transmissions.

In addition, in one case, the above-mentioned failure to meet the above-mentioned preset condition may be that the proportion of the channel state of the through link below the channel state threshold is not higher than the first proportion threshold, or the channel congestion degree of the through link is lower than the channel congestion. The ratio of the threshold is not higher than the second ratio threshold, or the service quality QoS of the direct link service is not higher than the service QoS threshold. In another case, the above-mentioned failure to meet the above-mentioned preset condition may be that the proportion of the direct link channel state below the channel state threshold is not higher than the first proportion threshold, or the direct link channel congestion degree is lower than the channel congestion threshold. The ratio is not higher than the second ratio threshold and the service QoS is not higher than the service QoS threshold. Or in another case, the failure to meet the preset condition may be that the proportion of the direct link channel state below the channel state threshold is not higher than the first proportion threshold, and the proportion of the direct link channel congestion degree below the channel congestion threshold is not high. At least two of the second ratio threshold and the service QoS threshold are not higher than the service QoS threshold are established.

In this embodiment, it can be realized that the ratio of the channel state of the through link below the channel state threshold (that is, the number of the channel state of the through link between terminals below the channel state threshold/the number of terminals of multiple terminals) is higher than the first At a ratio threshold, when the first terminal retransmits the first information after receiving the M-th NACK feedback, it transmits the first information N times; otherwise, when the first terminal receives the M-th NACK feedback, After NACK feedback, each time the first information is retransmitted, the first information is only retransmitted once.

And it can also be achieved when the direct link channel congestion degree is lower than the channel congestion threshold ratio (that is, the direct link channel congestion degree between terminals is lower than the channel congestion threshold number / the number of terminals of multiple terminals) is higher than the second In the proportional threshold, when the first terminal retransmits the first information after receiving the M-th NACK feedback, it transmits the first information N times; otherwise, when the first terminal receives the M-th NACK After the feedback, each time the first information is retransmitted, the first information is only retransmitted once.

It should be noted that at least one of the above-mentioned channel state threshold, channel congestion threshold, service QoS threshold, first ratio threshold, and second ratio threshold may be agreed upon by agreement, pre-configured, or configured by network equipment.

As an optional implementation manner, the value of the above N value is a protocol agreement, the network device is configured to the second terminal or the second terminal is pre-configured, and the resource location occupied by the first information transmission N times Instructed by the first terminal or network device to the second terminal; or

Wherein, the first terminal may indicate through direct link signaling, for example, through direct link control information (SCI) or through RRC (Sidelink RRC) signaling. Of course, it may also be The indication is performed through the direct communication interface PC5 signaling (PC5signalling) to indicate to the second terminal at least one of the value of N and the resource location.

The above-mentioned network equipment may indicate at least one of the value of N and the resource location to the second terminal through a broadcast message, RRC signaling or DCI.

Further, at least one of the value of N and the location of the resource may be indicated to the second terminal when it is determined that the first information is transmitted N times; or

At least one of the value of N and the resource location may be indicated to the second terminal before transmitting the first information.

Wherein, the foregoing instruction to the second terminal in the case of determining that the first information is transmitted N times may be that the first terminal or the network device only indicates the N information to the second terminal when it starts to transmit the first information N times. At least one of the value and the resource location.

The foregoing instruction to the second terminal before transmitting the first information may be, in the case that the second terminal knows the value of the foregoing parameter M, the instruction to the second terminal of N before transmitting the first information At least one of the value and the resource location. For example: the value of M is agreed and pre-configured by the protocol, or M is configured to the second terminal through the first terminal or the network device. In this way, after the second terminal has fed back M NACKs, it can be determined that the first terminal will send the first information N times later.

In the foregoing embodiment, the first terminal or network device can indicate to the second terminal the number of transmissions N of the first information and/or the resource location occupied by the N transmissions of the first information. If N is a protocol agreement, network device configuration If the second terminal or the second terminal is preconfigured, the first terminal or the network device does not need to indicate the number of transmissions of the second terminal N, but only needs to indicate the resources occupied by the N transmissions of the first information position. In this way, the success rate of receiving the first information by the second terminal is improved, and unnecessary detection by the second terminal can also be avoided, so as to save power consumption.

As an optional implementation manner, the redundancy version (Redundancy version, RV) number of the first information transmitted each time the first information is transmitted N times may be the same or different; or

Among them, the foregoing protocol agreement or network device configuration or pre-configuration may refer to:

Each time the first information is transmitted, the version number agreed by the agreement is used; or

N repeated transmissions, and recycle them in the order of the version numbers agreed in the agreement; or

N repeated transmissions all use the version number that should be used for this HARQ retransmission; or

The N times of repeated transmissions are in accordance with the order agreed by the protocol, and the version number is used cyclically starting from the version number that should be used for this HARQ retransmission.

As an optional implementation manner, the first terminal indicates to the second terminal the RV version number of the currently transmitted information through the direct link SCI or the direct link RRC signaling, which can improve the successful reception of the second terminal. Probability to the first message.

As an optional implementation manner, during the transmission of the first information, the value of N remains unchanged; or

During the transmission of the first information, the value of N is variable.

Wherein, in the above-mentioned transmission process of the first information, the value of N does not change, which may mean that the value of N does not change during the retransmission of the first information. Specifically, it may be that in different retransmission times, each The number of repeated transmissions is the same. For example, in the first retransmission, the first information is transmitted three times, and in the second retransmission, the first information is transmitted three times until the first information is successfully received.

In the above-mentioned transmission process of the first information, the value of N may be variable. The value of N may be variable during the retransmission of the first information. Specifically, there may be repeated transmissions in different retransmission times. Retransmissions with different times, for example: for the first retransmission, the first message is transmitted once, for the second retransmission, the first message is transmitted twice, for the third retransmission, the first message is transmitted three times, etc. . The variable value of N can improve the success rate of receiving the first information, and can also save transmission overhead.

Optionally, when the value of N is variable:

Wherein, the value of increasing N can also be increased by selecting a larger value from the set of N values. For example: the set of N values includes 1, 2 and 3, so that in the first retransmission, The first message is transmitted once, the first message is transmitted twice in the second retransmission, and the first message is transmitted three times in the third retransmission. In this way, after the first terminal receives the M-th NACK feedback, each time the first information is retransmitted, the number of consecutive transmissions of the first information N changes according to the value in the N value set from small to large, until the first terminal One information is received correctly.

Wherein, the foregoing N value set may be agreed by a protocol, pre-configured, or configured by a network device.

Further, during the transmission of the first information, the value range of N is a value in the N value set, and the value of N is increased to the maximum value of the N value set After that, the value of N is maintained unchanged. In this way, if the number of consecutive transmissions of the first information N is the maximum value in the N value set, the first information has not been received correctly, then maintain N as the maximum value in the N value set to increase the first information. The probability of the message being successfully received. For example: the above N value set includes 1, 2 and 3, so in the first retransmission, the first information is transmitted once, the second retransmission transmits the first information two times, and the third retransmission transmits the first information three times. One message, the 4th retransmission transmits the first message 3 times, and the 5th retransmission transmits the first message 3 times until the first message is successfully received.

As an optional implementation manner, the foregoing second terminal is multiple terminals, and the first terminal determines that the first information is transmitted N times according to the feedback result, including:

Wherein, the foregoing M feedbacks may be M feedback processes or feedback opportunities, where any one feedback may include NACKs fed back by all terminals that feedback NACK among the multiple terminals in this feedback or NACKs from the multiple terminals in this feedback. The feedback results of all terminals that have not been feedback. In addition, the foregoing M feedbacks may be continuous or discontinuous M feedbacks.

For example: the above-mentioned second terminal includes 5 terminals, the above-mentioned third ratio threshold is 3/5, and the above-mentioned M is 3. Thus, if there are 4 NACKs in the first feedback and 5 NACKs in the second feedback, And there are 4 NACKs in the third feedback, it is determined that the first information is transmitted N times.

For another example: the second terminal includes 5 terminals, the third ratio threshold is 3/5, and the M is 3, so if there are 4 NACKs in the first feedback and 2 NACKs in the second feedback And 3 feedback messages are not received, and there are 4 NACKs in the third feedback, it is determined that the first message is transmitted N times.

For example: the above-mentioned second terminal includes 5 terminals, the above-mentioned third ratio threshold is 3/5, and the above-mentioned M is 3. In this way, if 4 of the first feedback has not received feedback information, and the second feedback has If 5 feedback information is not received, and 4 feedback information is not received in the third feedback, it is determined that the first information is transmitted N times.

Further, in the foregoing multiple terminals, NACK may be fed back only when the reception is incorrect, and no ACK may be fed back, or, in the multiple terminals, NACK may be fed back when the reception is incorrect, and NACK may be fed back when the reception is correct. ACK, and no feedback if not received, it is DTX. For these two cases, the value of the third ratio threshold may be the same or different.

In addition, the above-mentioned third ratio threshold may be agreed upon by agreement, pre-configured or configured by network equipment.

In this embodiment, when the second terminal is multiple terminals, according to the NACK feedback each time and the situation that the feedback information is not received, the first information is determined to be transmitted N times to improve the transmission of the multicast scenario. reliability.

As an optional implementation manner, the second terminal feeds back NACK or ACK only once for the N transmissions of the first information.

In this way, it is possible to feed back NACK or ACK only once during one transmission, so as to save transmission overhead. For example, in one retransmission process, the first information is continuously transmitted three times. For these three first information transmissions, the second terminal only needs to feed back a NACK or ACK once to indicate that the reception failed or the reception was successful.

The following uses unicast and multicast to illustrate the methods provided in the embodiments of the present disclosure as examples:

Embodiment 1: Unicast scenario

The signaling flowchart can be shown in Figure 3:

Among them, the parameters M and N may be agreed upon by the protocol, or configured by the network device (for example, through the system broadcast message SIB, RRC dedicated signaling) or pre-configured to the first terminal (N may be a value or a set).

The first terminal sends the first information to the second terminal and receives the feedback result of the first information sent by the second terminal. When the feedback result is NACK or the feedback information is not received, the first terminal retransmits the first information to the second terminal. information;

Wherein, the first terminal receives M times of NACK feedback, and the sum of the number of times the first terminal receives NACK and the number of times that the feedback information is not received reaches M, or the number of times that the first terminal does not receive feedback information reaches M times. , Only retransmit the first message once;

After the first terminal receives the M-th NACK feedback, the sum of the number of times the first terminal has received NACK and the number of times the feedback information has not been received reaches M, or the number of times the first terminal has not received feedback information reaches M times, When the first information is retransmitted, the first information is continuously transmitted N times.

Optionally, a judgment may be made according to a preset condition of a terminal described in the embodiment shown in FIG. 2 to judge whether the condition for continuously transmitting the first information N times is satisfied, and if it is satisfied, the first information is continuously transmitted N times. If it is not met, the first information is only transmitted once (when the judgment condition is met, when the first information is continuously transmitted N times).

In addition, each time the first information is retransmitted, the number of consecutive transmissions of the first information N is unchanged, or each time the first information is retransmitted, the number of consecutive transmissions of the first information N is variable (in this case, N is configured as one set).

After the first terminal receives the M-th NACK feedback, the sum of the number of times the first terminal has received NACK and the number of times the feedback information has not been received reaches M, or the number of times the first terminal has not received feedback information reaches M times, Each time the first information is retransmitted, the number of consecutive transmissions of the first information N changes according to the value in the N value set from small to large, until the first information is correctly received;

When the first terminal transmits the first information continuously for N times, the second terminal only feeds back an ACK or NACK once until the first information is successfully transmitted.

Optionally, the first terminal or the network device instructs or configures the second terminal, the number of transmissions of the first information N or the resource location occupied by the N transmissions of the first information (if N is agreed by the protocol , Or the network device is configured or pre-configured to the second terminal, the first terminal or the network device does not need to indicate the number of transmissions N of the second terminal, but only needs to indicate the resource location occupied by the N transmissions of the first information ).

It should be noted that the order in which the instruction or configuration information is sent with other information is not limited, that is, it is not necessarily sent in the order of the information flow shown in Figure 3; for example, the information configured by the first terminal or network device This information can be configured when the first terminal and the second terminal initially establish a connection, or the information indicated by the SCI information of the first terminal, can be configured through the SCI information when the first terminal sends the first information to the second terminal N times Instructions.

Specifically, the first terminal may indicate to the second terminal the number of transmissions of the first information N or the number of N transmissions of the first information occupied by Sidelink RRC signaling, SCI or PC5-S signaling (PC5signalling) Resource location;

The network equipment may indicate the number of transmissions of the first information N or the resource location occupied by the N transmissions of the first information to the second terminal through broadcast RRC signaling, terminal-specific RRC signaling, or DCI; There are two ways:

When the first terminal or network device starts to transmit the first information N times, it indicates to the second terminal the number of transmissions of the first information N or the resource location occupied by the N transmissions of the first information; or

Before transmitting the first information, the first terminal or the network device may indicate to the second terminal the number of transmissions of the first information N or the resource location occupied by the N transmissions of the first information. This method can be applied to the situation where the second terminal has known the parameter M, that is, the parameter M is specified in the standard or is pre-configured, or the parameter M is configured to the second terminal through the first terminal or the network device. In this way, when the second terminal has fed back M NACKs, or the sum of the feedback NACK times and the non-feedback times reaches M, or the non-feedback times reaches M, it can be determined that the first terminal will send the first information N times.

In addition, the first terminal continuously transmits the first information N times, and the RV version number of each transmission in the N transmissions may be the same or different; or

The RV version number can be specified by the standard, or configured or pre-configured by the network equipment, for example:

Use the version number agreed in the agreement; or

Use the version number that should be used for this HARQ retransmission, and use the version number for N repeated transmissions; or

The N times of repeated transmissions are cyclically used starting from the version number that should be used for this HARQ retransmission according to the order agreed by the protocol.

Embodiment 2: Multicast scenario

The specific signaling flowchart can be shown in Figure 4:

The parameters M and N can be specified by the standard, or network equipment configuration (through system broadcast message SIB, RRC dedicated signaling) or pre-configured to the first terminal (N can be a value or a set)

The first terminal sends the first information to the second terminal 1 and the second terminal 2, and receives the feedback results of the first information sent by the second terminal 1 and the second terminal 2. When at least one of the feedback results is NACK or When the feedback information is not received, the first terminal retransmits the first information to the second terminal 1 and the second terminal 1.

Taking Figure 4 as an example, the second terminal 1 received the error, and the second terminal 2 received the correct message, but because it is a multicast message, as long as one of the feedback information is NACK or the feedback information is not received, it must be retransmitted and retransmitted. Information, all terminals in the group can receive.

The ratio of the number of NACKs received by the first terminal divided by the number of terminals of the second terminal in M feedbacks, or the number of NACKs received and the number of feedback messages not received divided by the number of second terminals If the ratio, or the ratio of the number of unreceived feedback information divided by the number of second terminals is higher than the third ratio threshold, when the first information is retransmitted, the first information is continuously transmitted N times; taking Figure 4 as an example, The number of received NACKs/the number of receiving terminals in the group=1/2, for example, the third ratio threshold is 0.4, when the first information is retransmitted, the first information is continuously transmitted N times.

The first terminal only retransmits the first information once before receiving M NACK feedback.

Optionally, a judgment may be made according to the preset conditions of multiple terminals described in the embodiment shown in FIG. 2 to determine whether the condition for continuously transmitting the first information N times is satisfied, and if it is satisfied, the first information is continuously transmitted N times If it is not satisfied, the first information is only transmitted once (when the judgment condition is satisfied, when the first information is continuously transmitted N times).

In addition, each time the first information is retransmitted, the number of consecutive transmissions of the first information N does not change; or, each time the first information is retransmitted, the number of consecutive transmissions N of the first information is variable (in this case, N is configured as one set).

After the first terminal receives the M-th NACK feedback, the sum of the number of times the first terminal has received NACK and the number of times the feedback information has not been received reaches M, or the number of times the first terminal has not received feedback information reaches M times, Each time the first information is retransmitted, the number of consecutive transmissions of the first information N changes from small to large according to the value in the N value set, until the first information is correctly received.

When the first terminal continuously transmits the first information N times, the second terminal 1 or the second terminal 1 only feeds back an ACK or NACK once, until the first information is successfully sent.

Optionally, the first terminal or network device instructs the second terminal, the number of transmissions of the first information N or the resource location occupied by the N transmissions of the first information (if N is specified by the standard, or If the network device is configured or pre-configured to the second terminal, the first terminal or the network device does not need to indicate the number of transmissions N of the second terminal, but only needs to indicate the resource location occupied by the N transmissions of the first information).

Specifically, the first terminal may indicate to the second terminal the number of transmissions of the first information N or the amount occupied by the N transmissions of the first information through Sidelink RRC signaling, SCI, or PC5-S signaling (PC5signalling). Resource location

The first terminal or the network device only instructs the second terminal when it starts to transmit the first information N times, the number of transmissions of the first information N or the resource location occupied by the N transmissions of the first information; or

Before transmitting the first information, the first terminal or the network device may indicate to the second terminal the number of transmissions of the first information N or the resource location occupied by the N transmissions of the first information. This method can be applied to the situation where the second terminal has known the parameter M, that is, the parameter M is specified in the standard or is pre-configured, or the parameter M is configured to the second terminal through the first terminal or the network device. In this way, when the second terminal has fed back M NACKs and the sum of the number of feedback NACKs and the number of unfeedback information reaches M, or the number of unfeedback information reaches M, it can be determined that the first terminal will send N times afterwards. One information.

Use the version number agreed in the agreement; or

In the embodiment of the present disclosure, the first terminal may determine the number of times the first terminal transmits the first information on the direct link N according to the feedback of the information transmitted on the direct link, where N is greater than or equal to A positive integer of 1. And the first terminal or the network device instructs the second terminal, the number of transmissions of the first information N or the resource location occupied by the N transmissions of the first information.

The through link transmission method provided by the embodiments of the present disclosure can improve the reliability of information transmission on the through link and reduce the service transmission delay.

Please refer to FIG. 5. FIG. 5 is a structural diagram of a terminal provided by an embodiment of the present disclosure. The terminal is the first terminal. As shown in FIG. 5, the terminal 500 includes:

The determining module 501 is configured to determine the first information to be transmitted N times according to the feedback result, where the feedback result is that the second terminal feedbacks the information sent by the first terminal to the second terminal on the through link N is a positive integer greater than or equal to 1;

The first transmission module 502 is configured to transmit the first information to the second terminal N times on the direct link.

Optionally, the feedback result includes at least one of the following:

A feedback result for the first information;

Optionally, the determining module 501 is configured to, if the first terminal receives M NACKs, determine that the first information is transmitted N times; or

The determining module 501 is configured to determine that the first information is transmitted for N times if the sum of the number of times the first terminal has received NACK and the number of times the feedback information has not been received reaches M; or

The determining module 501 is configured to, if the number of times that the first terminal does not receive the feedback information reaches M times, determine that the first information is transmitted N times;

Optionally, as shown in FIG. 6, the terminal 500 further includes:

The second transmission module 503 is configured to, when the first terminal receives the NACK fed back by the second terminal for the first information or does not receive the feedback information, if the number of NACKs and the number of feedback information are not received If the sum of times does not reach M, M NACKs are not received, or feedback information is not received M times, the first information is transmitted to the second terminal once on the through link;

The first transmission module 501 is configured to, when the first terminal receives the NACK fed back by the second terminal for the first information or does not receive the feedback information, if the number of NACKs and the number of times the feedback information is not received When the sum reaches M, M NACKs are received, or the number of times the feedback information is not received reaches M, the first information is transmitted to the second terminal N times on the through link.

The network equipment is instructed by broadcast message, RRC signaling or downlink control information DCI.

During the transmission of the first information, the value of N is variable.

Optionally, when the value of N is variable:

Optionally, the determining module 501 is configured to: the sum of the number of times that the first terminal receives NACK and the number of times that the feedback information is not received reaches M, the first terminal receives M times of NACK, or the first terminal does not receive When the number of feedback information reaches M times, if the link information of the through link meets a preset condition, it is determined that the first information is transmitted N times;

or,

The direct link service QoS is higher than the service QoS threshold.

Optionally, the QoS includes at least one of the following:

Reliability, delay, priority and communication range.

The direct link service QoS is higher than the service QoS threshold; or

or,

The direct link service QoS is higher than the service QoS threshold; or

Optionally, the second terminal is a plurality of terminals, and the determining module 501 is configured to determine that the first information is transmitted for N times if the proportion of the M feedback results is higher than the third proportion threshold, where the proportion is Refers to the ratio of the number of received NACKs divided by the number of terminals of the second terminal, or the ratio refers to the ratio of the number of NACKs received and the number of unreceived feedback information divided by the number of second terminals, or The ratio refers to the ratio of the number of no feedback information received divided by the number of the second terminals, where the M is a positive integer greater than or equal to 1.

The first terminal provided in the embodiment of the present disclosure can implement each process in the method embodiment shown in FIG. 2 and can achieve the same beneficial effects. To avoid repetition, details are not repeated here.

Please refer to FIG. 7. FIG. 7 is a structural diagram of another first terminal provided by an embodiment of the present disclosure. As shown in FIG. 7, the first terminal includes: a transceiver 710, a memory 720, a processor 700, and a storage device. A program on the memory 720 and runable on the processor 700, wherein:

The processor 700 is configured to determine, according to a feedback result, that the first information is to be transmitted N times, where the feedback result is the information that the second terminal sends to the second terminal on the direct link for the first terminal For the feedback result of feedback, N is a positive integer greater than or equal to 1;

The transceiver 710 is configured to transmit the first information to the second terminal N times on the direct link;

or,

The transceiver 710 is configured to determine that the first information is to be transmitted N times according to the feedback result, where the feedback result is the information sent by the second terminal to the second terminal on the direct link for the first terminal For the feedback result of feedback, N is a positive integer greater than or equal to 1;

The transceiver 710 is further configured to transmit the first information to the second terminal N times on the direct link.

Wherein, the transceiver 710 may be used to receive and send data under the control of the processor 700.

In FIG. 7, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 700 and various circuits of the memory represented by the memory 720 are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, no further descriptions are provided herein. The bus interface provides the interface. The transceiver 710 may be a plurality of elements, that is, include a transmitter and a receiver, and provide a unit for communicating with various other devices on a transmission medium.

The processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 can store data used by the processor 700 when performing operations.

It should be noted that the memory 720 is not limited to being only on the first terminal, and the memory 720 and the processor 700 may be separated in different geographic locations.

Optionally, the feedback result includes at least one of the following:

A feedback result for the first information;

Optionally, the determining that the first information is to be transmitted N times according to the feedback result includes:

Optionally, the transceiver 710 is further configured to: when the first terminal receives the NACK fed back by the second terminal for the first information or does not receive the feedback information, if the number of NACKs and the feedback is not received If the sum of the times of information does not reach M, M NACKs are not received, or feedback information is not received M times, the first information is transmitted to the second terminal once on the through link ；

During the transmission of the first information, the value of N is variable.

Optionally, when the value of N is variable:

or,

The direct link service QoS is higher than the service QoS threshold.

Optionally, the QoS includes at least one of the following:

Reliability, delay, priority and communication range.

The direct link service QoS is higher than the service QoS threshold; or

or,

The direct link service QoS is higher than the service QoS threshold; or

It should be noted that the above-mentioned first terminal in this embodiment may be the first terminal of any implementation manner in the method embodiments of the embodiments of the present disclosure, and any implementation manner of the first terminal in the method embodiments of the embodiments of the disclosure may be It is implemented by the above-mentioned first terminal in this embodiment and achieves the same beneficial effects, which will not be repeated here.

The implementation of the present disclosure also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps in the through link transmission method provided by the embodiments of the present disclosure are realized.

In the several embodiments provided in this application, it should be understood that the disclosed method and device can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

In addition, the functional units in the various embodiments of the present disclosure may be integrated into one processing unit, or each unit may be separately physically included, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.

The above-mentioned integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The above-mentioned software functional unit is stored in a storage medium and includes several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute part of the through-link transmission method described in each embodiment of the present disclosure step. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are optional implementations of the present disclosure. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present disclosure, several improvements and modifications can be made. These improvements and modifications It should also be regarded as the protection scope of the present disclosure.

Claims

A direct link transmission method, including:

According to the feedback result, the first terminal determines that the first information is to be transmitted N times, where the feedback result is the feedback result of the second terminal's feedback on the information sent by the first terminal to the second terminal on the through link , N is a positive integer greater than or equal to 1;

The first terminal transmits the first information to the second terminal N times on the through link.
The method of claim 1, wherein the feedback result includes at least one of the following:

A feedback result for the first information;

Feedback results of other information sent by the first terminal to the second terminal on the through link;

A feedback result of the first information and other information sent by the first terminal to the second terminal on the through link.
The method of claim 1, wherein the first terminal determines that the first information is to be transmitted N times according to the feedback result, comprising:

If the first terminal receives M NACKs, it is determined that the first information is transmitted N times; or

If the sum of the number of times that the first terminal receives NACK and the number of times that the feedback information is not received reaches M, it is determined that the first information is transmitted N times; or

If the number of times that the first terminal does not receive the feedback information reaches M times, it is determined that the first information is transmitted N times;

Wherein, the N is a positive integer greater than 1, and the M is a positive integer greater than or equal to 1.
The method of claim 3, wherein at least one of the M and the N is agreed upon by a protocol, pre-configured or configured by a network device.
The method of claim 3, further comprising:

In the case that the first terminal receives the NACK fed back by the second terminal for the first information or does not receive the feedback information, if the sum of the number of NACKs and the number of times that the feedback information is not received does not reach M, M NACKs are received or feedback information is not received for M times, then the first information is transmitted to the second terminal once on the through link;

The first terminal transmitting the first information to the second terminal N times on the through link includes:

In the case that the first terminal receives the NACK fed back by the second terminal for the first information or does not receive the feedback information, if the sum of the number of NACKs and the number of times that the feedback information is not received reaches M, the received If the number of times of NACKs or no feedback information received reaches M times, the first terminal transmits the first information to the second terminal N times on the through link.
The method according to claim 1, wherein the value of N is a protocol agreement, a network device is configured to the second terminal or the second terminal is pre-configured, and the first information is transmitted N times. The resource location of is indicated to the second terminal by the first terminal or network device; or

The value of N and/or the resource location occupied by the first information transmission N times are indicated to the second terminal by the first terminal or the network device.
The method according to claim 6, wherein at least one of the value of N and the resource location is indicated to the second terminal when it is determined that the first information is transmitted N times; or

At least one of the value of N and the resource location is indicated to the second terminal before transmitting the first information.
The method according to claim 6, wherein the first terminal indicates through direct link control information SCI or direct link RRC signaling; or

The network equipment is instructed by broadcast message, RRC signaling or downlink control information DCI.
The method according to claim 1, wherein the RV number of the redundancy version of the first information transmitted each time in the said first information is the same or different; or

The RV number for each transmission of the first information in the first information transmitted N times is a protocol agreement or network device configuration or pre-configuration.
The method according to claim 1, wherein during the transmission of the first information, the value of N is unchanged; or

During the transmission of the first information, the value of N is variable.
The method of claim 10, wherein, when the value of N is variable:

During the transmission of the first information, if it is necessary to retransmit the first information multiple times to the second terminal, the value of N increases as the number of retransmissions increases. The retransmission of the first information refers to transmitting the first information N times.
The method according to claim 11, wherein, during the transmission of the first information, the value range of N is a value in the N value set, and the value of N is increased to After the value of N is the maximum value of the set of values, the value of N is maintained unchanged.
The method of claim 3, wherein the determining that the first information is transmitted N times comprises:

If the link information of the through link meets a preset condition, determining that the first information is transmitted N times;

Wherein, the N is a positive integer greater than 1, and the link information includes link status and/or link service information.
The method according to claim 13, wherein the sum of the number of times that the first terminal receives NACK and the number of times that the feedback information is not received reaches M, the first terminal receives M times of NACK, or the first terminal When the number of times that the feedback information is not received reaches M times, if the link information of the through link does not meet the preset condition, it is determined that the first information is transmitted once.
The method according to claim 13, wherein, when the second terminal is a terminal, the link information of the through link meeting a preset condition refers to at least one of the following:

The channel state of the through link is lower than the channel state threshold;

The channel congestion of the through link is lower than the channel congestion threshold;

The service quality QoS of the direct link service is higher than the service QoS threshold;

or,

In the case where the second terminal is multiple terminals, the link information of the through link meeting a preset condition refers to at least one of the following:

The proportion of the channel state of the through link being lower than the channel state threshold is higher than the first proportion threshold;

The proportion of the direct link channel congestion degree lower than the channel congestion threshold is higher than the second proportion threshold;

The direct link service QoS is higher than the service QoS threshold.
The method according to claim 15, wherein the QoS includes at least one of the following:

Reliability, delay, priority and communication range.
The method according to claim 15, wherein, in the case that the second terminal is a terminal, the link information of the through link meeting a preset condition means that the through link service QoS is higher than the service QoS threshold ;or

In the case that the direct link service QoS is not higher than the service QoS threshold, the channel congestion degree of the direct link is lower than the channel congestion threshold;

or,

In the case where the second terminal is multiple terminals, the link information of the through link meeting a preset condition refers to:

The direct link service QoS is higher than the service QoS threshold; or

In the case that the direct link service QoS is not higher than the service QoS threshold, the proportion of the direct link channel congestion degree lower than the channel congestion threshold is higher than the second proportion threshold.
The method according to any one of claims 1 to 17, wherein the second terminal is a plurality of terminals, and the first terminal determines the first information to be transmitted N times according to the feedback result, including:

If the proportion of M feedback results is higher than the third proportion threshold, it is determined that the first information is transmitted N times, where the proportion refers to the proportion of the number of received NACKs divided by the number of terminals of the second terminal , Or, the ratio refers to the ratio of the number of NACKs received and the number of non-received feedback information divided by the number of the second terminal, or the ratio refers to the number of non-received feedback information divided by the second terminal The ratio of the quantity, wherein the M is a positive integer greater than or equal to 1.
The method according to any one of claims 1 to 17, wherein the second terminal only feeds back NACK or ACK once for the N transmissions of the first information.
The method according to any one of claims 1 to 17, wherein the first terminal indicates the RV version number of the currently transmitted information to the second terminal through direct link SCI or direct link RRC signaling.
A terminal, the terminal being a first terminal, including:

The determining module is configured to determine the first information to be transmitted N times according to the feedback result, where the feedback result is that the second terminal feeds back the information sent by the first terminal to the second terminal on the through link Feedback result, N is a positive integer greater than or equal to 1;

The first transmission module is configured to transmit the first information to the second terminal N times on the direct link.
The terminal according to claim 21, wherein the feedback result includes at least one of the following:

A feedback result for the first information;

Feedback results of other information sent by the first terminal to the second terminal on the through link;

A feedback result of the first information and other information sent by the first terminal to the second terminal on the through link.
The terminal according to claim 21, wherein the determining module is configured to determine that the first information is transmitted N times if the first terminal receives M NACKs; or

The determining module is configured to determine that the first information is transmitted for N times if the sum of the number of times that the first terminal receives NACK and the number of times that the feedback information is not received reaches M; or

The determining module is configured to determine that the first information is transmitted N times if the number of times that the first terminal does not receive the feedback information reaches M times;

Wherein, the N is a positive integer greater than 1, and the M is a positive integer greater than or equal to 1.
The terminal according to claim 23, further comprising:

The second transmission module is configured to, when the first terminal receives the NACK fed back by the second terminal for the first information or the feedback information is not received, if the number of NACKs and the number of times that the feedback information is not received If the sum does not reach M, M NACKs are not received, or the number of times that feedback information is not received does not reach M, the first information is transmitted to the second terminal once on the through link;

The first transmission module is configured to, when the first terminal receives the NACK fed back by the second terminal for the first information or does not receive the feedback information, if the number of NACKs and the number of feedback information are not received When the sum of the times reaches M, the number of times that NACKs are received for M times, or the feedback information is not received reaches M times, the first information is transmitted to the second terminal N times on the through link.
The terminal according to claim 23, wherein the determining module is configured to: the sum of the number of times that the first terminal receives NACK and the number of times that the feedback information is not received reaches M, and the first terminal receives M times of NACK Or when the number of times that the first terminal has not received the feedback information reaches M times, if the link information of the through link meets a preset condition, it is determined that the first information is transmitted N times;

Wherein, the N is a positive integer greater than 1, and the link information includes link status and/or link service information.
A terminal, the terminal being a first terminal, comprising: a transceiver, a memory, a processor, and a program stored in the memory and running on the processor, wherein:

The processor is configured to determine, according to the feedback result, that the first information is to be transmitted N times, where the feedback result is that the second terminal performs the transmission of the information sent by the first terminal to the second terminal on the through link The feedback result of the feedback, N is a positive integer greater than or equal to 1;

The transceiver is configured to transmit the first information to the second terminal N times on the direct link;

or,

The transceiver is configured to determine, according to the feedback result, that the first information is to be transmitted N times, where the feedback result is that the second terminal performs the transmission of the information sent by the first terminal to the second terminal on the direct link The feedback result of the feedback, N is a positive integer greater than or equal to 1;

The transceiver is further configured to transmit the first information to the second terminal N times on the direct link.
The terminal according to claim 26, wherein the feedback result includes at least one of the following:

A feedback result for the first information;

Feedback results of other information sent by the first terminal to the second terminal on the through link;

A feedback result of the first information and other information sent by the first terminal to the second terminal on the through link.
The terminal according to claim 26, wherein the first terminal determines that the first information is to be transmitted N times according to the feedback result, comprising:

If the first terminal receives M NACKs, it is determined that the first information is transmitted N times; or

If the sum of the number of times that the first terminal receives NACK and the number of times that the feedback information is not received reaches M, it is determined that the first information is transmitted N times; or

If the number of times that the first terminal does not receive the feedback information reaches M times, it is determined that the first information is transmitted N times;

Wherein, the N is a positive integer greater than 1, and the M is a positive integer greater than or equal to 1.
The terminal according to claim 28, wherein the transceiver is further configured to: when the first terminal receives the NACK fed back by the second terminal for the first information or the feedback information is not received If the sum of the number of NACK times and the number of times that the feedback information is not received does not reach M, the number of times that NACKs are not received, or the number of times that the feedback information is not received does not reach M times, then the second The terminal transmits the first information once;

The transmitting the first information to the second terminal N times on the through link includes:

In the case that the first terminal receives the NACK fed back by the second terminal for the first information or does not receive the feedback information, if the sum of the number of NACKs and the number of times that the feedback information is not received reaches M, the received If the number of times of NACKs or no feedback information is received reaches M times, the first information is transmitted to the second terminal N times on the through link.
The terminal according to claim 26, wherein the value of N is a protocol agreement, a network device is configured to the second terminal or the second terminal is pre-configured, and the first information is transmitted N times. The resource location of is indicated to the second terminal by the first terminal or network device; or

The value of N and/or the resource location occupied by the first information transmission N times are indicated to the second terminal by the first terminal or the network device.
The terminal according to claim 26, wherein the RV number of the redundancy version for each transmission of the first information in the first information transmission N times is the same or different; or

The RV number for each transmission of the first information in the first information transmitted N times is a protocol agreement or network device configuration or pre-configuration.
The terminal according to claim 26, wherein during the transmission of the first information, the value of the N is unchanged; or

During the transmission of the first information, the value of N is variable.
The terminal according to claim 28, wherein said determining that the first information is transmitted N times comprises:

If the link information of the through link meets a preset condition, determining that the first information is transmitted N times;

Wherein, the N is a positive integer greater than 1, and the link information includes link status and/or link service information.
The terminal according to claim 33, wherein the sum of the number of times of receiving NACK and the number of times not receiving feedback information reaches M, the first terminal receives M times of NACK or the first terminal When the number of times that the feedback information is not received reaches M times, if the link information of the through link does not meet the preset condition, it is determined that the first information is transmitted once.
A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps in the through link transmission method according to any one of claims 1 to 20.