CN113132067A

CN113132067A - Data retransmission activation method, equipment, device and storage medium

Info

Publication number: CN113132067A
Application number: CN202010043396.3A
Authority: CN
Inventors: 王达
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2021-07-16
Anticipated expiration: 2040-01-15
Also published as: CN115866677A; WO2021143389A1; CN113132067B

Abstract

The application discloses a data retransmission activation method, equipment, a device and a storage medium, wherein the method comprises the following steps: the first user equipment determines whether to activate the data repeat transmission of the direct link according to the channel quality or the indication information of the indication equipment; the indication device is a network side device accessed by the first user device or a second user device communicated with the first user device. The method can determine the condition for activating the data repeated transmission, and the reliability of receiving information by the receiving end is further improved based on the method for activating the data repeated transmission.

Description

Data retransmission activation method, equipment, device and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method, a device, an apparatus, and a storage medium for activating data retransmission.

Background

Vehicle wireless communication technology (vehicle to X, V2X) enables communication between vehicles, between vehicles and base stations, and between base stations. Therefore, the surrounding conditions of the vehicles can be sensed in real time, the road information can be shared, and early warning can be given in time when the traffic conditions appear. In the existing Long Term Evolution (LTE) V2X technology (Rel-14 LTE V2X technology), PC5 interface (also called direct link, described as sildelink in the protocol) broadcast communication for transmitting data between a User Equipment (UE) and the UE can support transmission of basic traffic based on road security.

With the further development of the car networking technology, New standard (New Radio, NR) V2X appears some New application scenarios compared to LTE V2X, such as: vehicle formation, advanced driving, sensor information sharing, remote control, and the like. For NR V2X unicast, multicast and broadcast services, in order to improve the reliability of data transmission, a retransmission mechanism needs to be introduced, so as to improve the reliability of receiving information by a receiving end, but how to determine the conditions for activating retransmission is not determined.

Based on this, a new data retransmission activation method is needed to solve the above problems.

Disclosure of Invention

The application provides a data retransmission activation method, equipment, a device and a storage medium, which are used for determining activation conditions of data retransmission.

The embodiment of the application provides a data retransmission activation method, which comprises the following steps:

the first user equipment determines whether to activate the data repeat transmission of the direct link according to the channel quality or the indication information of the indication equipment;

the indication device is a network side device accessed by the first user device or a second user device communicated with the first user device.

By the method, the condition for activating the repeated transmission of the data can be determined, and the reliability of receiving information by the receiving end is further improved.

Optionally, the method further includes:

and the first user equipment determines the number of channels (leg) for activating the data transmission of the through link according to the channel quality or the indication information of the indication equipment.

By the method, the number of the legs which need to activate the repeated transmission can be determined, so that the reliability of the repeated transmission of the data is higher.

Optionally, the channel quality is determined according to at least one of the following information:

channel state information of a target channel, wherein the target channel is a channel for communication between the first user equipment and the second user equipment;

and Hybrid Automatic Repeat Request (HARQ) information fed back by the second user equipment.

The inclusion of various information in the channel quality in this manner makes the conditions for determining the activation of repeated transmission of data more diverse.

Optionally, the determining, by the first user equipment, whether to activate data retransmission of the direct link includes:

if the channel quality is determined according to the channel state information of the target channel, the first user equipment determines whether to activate data repeat transmission of the direct link according to a comparison result of the channel state information and a first threshold set, wherein the first threshold set comprises at least one threshold value.

According to the method, the target channel state information is compared with the first threshold set to determine whether to activate the data repeat transmission of the through link, so that the activation condition of the data repeat transmission of the activated through link is more definite.

Optionally, when the first threshold set includes multiple threshold values, the determining, by the first user equipment, the number of legs for activating data transmission of the direct link according to the channel quality includes:

the first user equipment determines the activation number corresponding to the value range to which the value of the channel state information belongs according to a first corresponding relation between the value range and the activation number, wherein the value range in the first corresponding relation is determined according to a plurality of threshold values included in the first threshold set;

and the first user equipment takes the determined activation number as the number of legs for activating the data transmission of the through link.

This approach makes the activation condition for activating the data repeat transmission of the through link more definite.

Optionally, the channel state information includes at least one of the following parameters:

channel State Information (CSI), Channel Quality Indication (CQI), Rank Indication (RI), Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Received Signal Strength Indication (Received Signal Strength Indication, RSSI), Channel Busy Ratio (CBR), Channel occupancy (CR), block error rate (bler), and Sounding Reference Signal (SRS) measured by the first user equipment.

This approach allows for a more diverse selection of channel state information in determining conditions for activating repeated transmission of data.

if the channel quality is determined according to the HARQ information fed back by the second user equipment, the first user equipment determines a target value according to the HARQ information fed back by the second user equipment;

and the first user equipment determines whether to activate repeated data transmission of the through link according to a comparison result of the target value and a second threshold set, wherein the second threshold set comprises at least one threshold value.

Optionally, the HARQ information includes at least one of the following parameters:

ACK (acknowledgement), NACK (Negative acknowledgement), and DTX (Discontinuous Transmission).

This approach allows for a more diverse selection of HARQ information in determining conditions for activating repeated transmission of data.

Optionally, in a case that the second threshold set includes a plurality of threshold values; the first user equipment determines the number of legs for activating data transmission of the through link according to the channel quality, and the method comprises the following steps:

the first user equipment determines the activation number corresponding to the value range to which the value of the target value belongs according to a second corresponding relationship between the value range and the activation number, wherein the value range in the second corresponding relationship is determined according to a plurality of threshold values included in the second threshold set;

Optionally, if data transmission is performed between the first user equipment and the second user equipment through unicast communication, the target value is the number of pieces of specified information in the HARQ information fed back by the second user equipment, or the target value is a ratio of the number of pieces of specified information to the number of pieces of HARQ information fed back;

wherein the specific information is NACK and/or DTX, or the specific information is ACK.

This approach makes the activation condition for activating the data retransmission of the through link in the unicast communication more definite.

Optionally, if data transmission is performed between the first user equipment and the second user equipment through multicast or broadcast communication, the target value is a ratio of the number of designated information in the HARQ information fed back by the second user equipment to the number of the HARQ information fed back; alternatively, the first and second electrodes may be,

if data transmission is carried out between the first user equipment and the second user equipment through multicast communication, the target value is the ratio of the designated information to the number of the second user equipment in multicast;

This approach makes the activation condition for activating the repeated transmission of data of the through link in multicast or broadcast communication more definite.

Optionally, the information carried in the indication information includes at least one of the following:

information for indicating activation of data repeat transmission of the through link;

information indicating the number of legs activating data transmission of the through link;

information indicating a number of legs for activating data repetitive transmission of the through link and activating data transmission of the through link;

information for indicating not to activate or deactivate data retransmission of the pass-through link;

information indicating the number of legs for not activating or deactivating data transmission of the through link;

and the information is used for indicating the number of legs which do not activate or deactivate the repeated data transmission of the through link and do not activate or deactivate the data transmission of the through link.

The method makes the content of the indication information clear, so that the data activation of the direct link is more clear.

the method comprises the steps that indication information is sent to first user equipment by the indication equipment, wherein the indication information is used for indicating whether the first user equipment activates data repeated transmission of a direct link or not;

Optionally, the indication device determines, according to the indication information, the number of channels (leg) activating data transmission of the through link.

Optionally, the indication information is determined by channel quality.

In this way, the determination method of the information can be specified explicitly.

and the second user equipment feeds back hybrid automatic repeat request (HARQ) information.

The inclusion of various information in the channel quality in this manner allows a greater variety of conditions for determining the repeated transmission of activation data.

Optionally, the indication information is determined by:

if the channel quality is determined according to the channel state information of the target channel, the indication device determines indication information according to a comparison result of the channel state information and a first threshold set, wherein the first threshold set comprises at least one threshold value.

Optionally, in a case that the first threshold set includes a plurality of threshold values; the indicating equipment determines the number of legs for activating the data transmission of the through link according to the channel quality, and the method comprises the following steps:

the indicating equipment determines the activation number corresponding to the value range to which the value of the channel state information belongs according to a first corresponding relation between the value range and the activation number, wherein the value range in the first corresponding relation is determined according to a plurality of threshold values included in the first threshold set;

and the indication equipment takes the determined activation number as the number of leg of the data transmission of the activated through link.

channel state information CSI, channel quality indication CQI, rank indication RI, reference signal received power RSRP, reference signal received quality RSRQ, signal to interference plus noise ratio SINR, received signal strength indication RSSI, channel busy ratio CBR, occupancy CR, block error rate, bit error rate, and sounding reference signal SRS measured by the first user equipment.

Optionally, the indication information is determined by:

if the channel quality is determined according to the HARQ information fed back by the second user equipment, the indicating equipment determines a target value according to the HARQ information fed back by the second user equipment;

and the indicating equipment determines indicating information according to the comparison result of the target numerical value and a second threshold set, wherein the second threshold set comprises at least one threshold value.

ACK correctly acknowledged, NACK incorrectly acknowledged, and DTX discontinuously transmitted.

Optionally, in a case that the second threshold set includes a plurality of threshold values; the indicating equipment determines the number of legs for activating the data transmission of the through link according to the channel quality, and the method comprises the following steps:

the indicating equipment determines the activation number corresponding to the value range to which the value of the target value belongs according to a second corresponding relation between the value range and the activation number, wherein the value range in the second corresponding relation is determined according to a plurality of threshold values included in the second threshold set;

information indicating that data retransmission of the first user equipment pass-through link is activated;

information for indicating the number of legs activating data transmission of the first user equipment through link;

information for indicating the number of leg for activating data repeated transmission of the first user equipment through link and activating data transmission of the first user equipment through link;

information for indicating not to activate or deactivate data retransmission of the first user equipment pass-through link;

An embodiment of the present application provides a first user equipment, including: a processor, memory, transceiver;

wherein the processor is configured to read the computer instructions in the memory, and execute:

determining whether to activate data repeat transmission of the direct link according to the channel quality or indication information of the indication device;

Optionally, the processor is further configured to perform: and determining the number of channels (leg) for activating data transmission of the through link according to the channel quality or the indication information of the indication equipment.

Optionally, the processor determines whether to activate data retransmission of the direct link, and executes:

and if the channel quality is determined according to the channel state information of the target channel, determining whether to activate repeated data transmission of the through link according to a comparison result of the channel state information and a first threshold set, wherein the first threshold set comprises at least one threshold value.

Optionally, when the first threshold set includes multiple threshold values, the processor determines, according to the channel quality, the number of legs for activating data transmission of the direct link, and performs:

determining an activation number corresponding to a value range to which a value of the channel state information belongs according to a first corresponding relationship between the value range and the activation number, wherein the value range in the first corresponding relationship is determined according to a plurality of threshold values included in the first threshold set;

and taking the determined activation number as the number of leg of the data transmission of the activated through link.

if the channel quality is determined according to the HARQ information fed back by the second user equipment, determining a target value according to the HARQ information fed back by the second user equipment;

and determining whether to activate data repeated transmission of the through link according to a comparison result of the target value and a second threshold set, wherein the second threshold set comprises at least one threshold value.

Optionally, when the second threshold set includes multiple thresholds, the processor determines, according to the channel quality, the number of legs for activating data transmission of the direct link, and performs:

determining the activation number corresponding to the value range to which the value of the target value belongs according to a second corresponding relationship between the value range and the activation number, wherein the value range in the second corresponding relationship is determined according to a plurality of threshold values included in the second threshold set;

An embodiment of the present application provides an indicating apparatus, including: a processor, memory, transceiver;

sending indication information to first user equipment, wherein the indication information is used for indicating whether the first user equipment activates data repeated transmission of a direct link;

Optionally, the processor determines, according to the indication information, the number of channels (leg) activating data transmission of the through link.

Optionally, the indication information is determined by channel quality.

Optionally, the processor determines the indication information, and executes:

and if the channel quality is determined according to the channel state information of the target channel, determining indication information according to a comparison result of the channel state information and a first threshold set, wherein the first threshold set comprises at least one threshold value.

Optionally, the processor determines the indication information, and executes:

and determining indication information according to a comparison result of the target numerical value and a second threshold set, wherein the second threshold set comprises at least one threshold value.

An embodiment of the present application provides a data retransmission activation apparatus, where the apparatus includes:

the determining module is used for determining whether to activate the data repeat transmission of the direct link according to the channel quality or the indication information of the indicating equipment;

a sending module, configured to send indication information to a first user equipment, where the indication information is used to indicate whether the first user equipment activates data retransmission of a direct link;

The present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps of the data retransmission activation method according to any one of the above-mentioned embodiments.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic communication diagram of V2X;

FIG. 2 is a diagram illustrating PDCP duplicate;

fig. 3 is a schematic view of an application scenario of a communication system according to an embodiment of the present application;

fig. 4 is a schematic diagram of a first user equipment determining whether to activate data retransmission of a direct link according to channel quality according to an embodiment of the present application;

fig. 5 is a schematic diagram illustrating that a first user equipment determines whether to activate data retransmission of a direct link according to indication information of a second user equipment according to an embodiment of the present application;

fig. 6 is a schematic diagram illustrating that the first user equipment determines whether to activate data retransmission of the direct link according to indication information of the network side device according to the embodiment of the present application;

fig. 7 is a flowchart illustrating a data retransmission activation method according to an embodiment of the present application;

fig. 8 is a flowchart illustrating a data retransmission activation method according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a first user equipment according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a network-side device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a data retransmission activation device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a data retransmission activation device according to an embodiment of the present application.

Detailed Description

Hereinafter, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

(1) The network side device is a device for providing a wireless communication function for the terminal, and includes but is not limited to: a gbb in 5G, a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved node B or home node B, HNB), a BaseBand Unit (BBU), a transmission point (TRP), a Transmission Point (TP), a mobile switching center (msc), and the like. The base station in the present application may also be a device that provides the terminal with a wireless communication function in other communication systems that may appear in the future.

(2) A User Equipment (UE) is a device that can provide voice and/or data connectivity to a User. For example, the terminal device includes a handheld device, an in-vehicle device, and the like having a wireless connection function. Currently, the terminal device may be: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like.

In LTE systems, direct communication is allowed between user equipments. For convenience of description, a direct communication link between user equipments is defined as a Sidelink link, and a corresponding wireless interface thereof is referred to as a direct communication interface (also referred to as a Sidelink interface); the cellular communication link between the network side device and the user equipment is called uulink link, and the corresponding interface is called Uu interface. As shown in fig. 1, UE1 and UE2 communicate directly via a Sidelink link, and UE1 and UE2 communicate with a network side device via a uulink link.

It should be noted that the user equipments in direct communication may be all on-line or all off-line, or some user equipments may be on-line or some user equipments may be off-line. The user equipment participating in direct communication, namely on-line, is positioned in the coverage of the communication carrier of the 3GPP base station, and the user equipment participating in direct communication, namely off-line, is not positioned in the coverage of the communication carrier of the 3GPP base station.

The conventional direct communication method includes the following three types:

mode 1, one-to-one communication (i.e. unicast communication) between user equipment in direct communication;

mode 2, one user equipment can send the same data to all user equipments in one communication group at a time (i.e. multicast communication);

mode 3, one user equipment can transmit the same data (broadcast communication) to all nearby user equipments at a time (where the LTE system supports only broadcast communication).

In order to meet the requirements of services with high reliability and low time delay of a direct communication interface, a Packet Data Convergence Protocol (PDCP) duplicate of the direct communication interface is introduced into an LTE system.

The PDCP duty, i.e., one Radio bearer (corresponding to one PDCP entity) of the PDCP layer, is transmitted through a plurality of Logical channels (each Logical Channel corresponds to one RLC entity) in a Radio Link Control (RLC) layer. Fig. 2 shows that the PDCP duplicate is transmitted by 2 legs, that is, one PDCP entity corresponds to 2 RLC entities, and the repeated PDCP data packets are transmitted by 2 logical channels.

In the NR system, the PDCP duty can support more leg for repeated transmission, for example, support up to 4 legs for data retransmission.

For a Data Radio Bearer (DRB), the network side device may configure a maximum of 4 legs for Data retransmission, and select to activate or deactivate legs, for example, activate 2 legs, or activate 4 legs, or deactivate 2 legs, or deactivate all 4 legs (i.e., deactivate the repeated transmission of the DRB).

However, in the related art, in the PDCP retransmission mechanism, the base station determines to activate the PDCP retransmission of the DRB of the UE and determines to activate several legs, but in the Sidelink link, especially for the UE in the off-line state, the UE itself needs to determine how to activate the PDCP retransmission and needs to consider the influence of the channel state change on whether to activate the retransmission mechanism, so as to better ensure the reliability of the service transmission. In addition, no clear scheme is given according to what conditions repeat transmission is activated, and a data retransmission activation method is proposed based on the scheme.

Unicast communication and multicast communication can be introduced into the direct communication of the NR system, and feedback is introduced into the unicast communication and the multicast communication, namely, a receiving end can feed back Channel State Information (CSI) and/or hybrid automatic repeat request (HARQ) feedback information to a transmitting end. Therefore, the sending end can adjust the sending parameters according to the CSI and/or carry out retransmission according to the HARQ feedback information.

Correspondingly, referring to fig. 3, the technical solution provided in the embodiment of the present application is applied to a communication system, where the system includes a first user equipment 2 and a pointing device 3, where the pointing device 3 includes a second user equipment 30 and a network-side device 31. The indication device 3 may send indication information to the first user equipment 2 so that the first user equipment activates or deactivates data retransmission activation, or the first user equipment determines whether to activate data retransmission activation according to channel quality.

It should be noted that the data retransmission activation method of the present application is not limited to be performed in the LTE system or the NR system, and the method of activating data retransmission is first introduced from the first user equipment end, when data retransmission is activated, the first user equipment may determine whether to activate data retransmission of a direct link according to channel quality or indication information of an indication device, where the indication device is a network side device accessed by the first user equipment or a second user equipment communicating with the first user equipment. When unicast communication is performed between the direct communication terminals, the number of the second user equipment is 1; when the direct communication is multicast communication or broadcast communication, the second user equipment may be plural.

In addition, the first user equipment can also determine the number of legs for activating data transmission of the through link according to the channel quality or the indication information of the indication equipment.

The channel quality may be characterized by at least one of the following information:

information 1: and channel state information of a target channel, wherein the target channel is a channel between the second user equipment and the first user equipment, and the channel state information is obtained by measuring and feeding back the target channel after the first user equipment sends service information and/or a reference signal, and the second user equipment receives the service information and/or the reference signal, or the first user equipment measures the target channel.

Information 2: and the second user equipment feeds back the HARQ information, wherein the HARQ information is fed back by the second user equipment after the first user equipment sends the service information.

Based on the two kinds of information, the channel quality can be judged in two ways respectively, and then whether to activate the data repeat transmission of the direct link is determined, and then different information is introduced respectively.

If the channel quality is information 1, the channel state information includes at least one of the following parameters, including: the first user equipment is used for measuring the SRS measured by the first user equipment, wherein the CSI, the CQI, the RI, the RSRP, the RSRQ, the SINR, the RSSI, the CBR, the CR, the block error rate and the SRS are fed back by the second user equipment. The smaller the values of the CSI, the CQI, the RI, the RSRP, the RSRQ, the SINR, the RSSI, the CBR, and the CR and the SRS information measured by the first user equipment are, the more data needs to be repeatedly transmitted in the through link, and the larger the values of the block error rate and the bit error rate are, the more data needs to be repeatedly transmitted in the through link. Here, the CSI, CQI, RI, RSRP, RSRQ, SINR, RSSI, CBR, CR, and SRS measured by the first user equipment are assumed to be the first channel state information, and the block error rate and the bit error rate are assumed to be the second channel state information.

The first user equipment may determine whether to activate data retransmission of the through link in the following manner.

Mode 1, comparing and determining the target channel state information with a first threshold set.

If the channel state information is one of the above parameters, the first threshold set may be set to be a specific set of values, and if the parameter value of the channel state information does not meet the specifications of the first threshold set (i.e., is less than or equal to at least one of the threshold values of the first threshold set, or is greater than or equal to at least one of the threshold values of the first threshold set), the data retransmission of the direct link is activated. Specifically, whether to select the threshold value smaller than or equal to the first threshold set or the threshold value larger than or equal to the first threshold set may be determined according to the selected parameter value of the channel state information, and is not specifically limited herein.

If the first channel state information is one of the upper parameters, the first threshold set can be set as a specific value set, and when the parameter value of the first channel state information is less than or equal to at least one value in the first threshold set, the data repeat transmission of the direct link is activated; and when the value of the first channel state information is greater than all threshold values in the first threshold set, determining not to activate or deactivate the repeated data transmission of the direct link.

Such as: the channel state information is CSI, the first threshold set includes 3 values, which are respectively a threshold value 1, a threshold value 2, and a threshold value 3, and a value of the threshold value 1 is greater than the threshold value 2, and the threshold value 2 is greater than the threshold value 3, and if the value of the CSI fed back by the second user equipment is less than or equal to the threshold value 1, the data retransmission of the direct link is activated, or if the value of the CSI is greater than the threshold value 1, the data retransmission of the direct link is not activated or deactivated, where the deactivation is that the activation is prohibited when the data transmission of the direct link is in an activated state.

If the second channel state information is one of the parameters, the first threshold set can be set as a specific value set, and when the parameter value of the channel state information is greater than or equal to at least one value in the first threshold set, the data repeat transmission of the through link is activated; and when the value of the channel state information is smaller than all threshold values in the first threshold set, determining not to activate or deactivate the repeated data transmission of the direct link.

Such as: the channel state information is a block error rate, the first threshold set includes 3 values, which are respectively a threshold value 1, a threshold value 2, and a threshold value 3, and a value of the threshold value 1 is greater than the threshold value 2, and the threshold value 2 is greater than the threshold value 3, assuming that a value of the block error rate fed back by the second user equipment is greater than or equal to the threshold value 3, the data retransmission of the direct link is activated, or, assuming that the value of the block error rate is less than the threshold value 3, the data retransmission of the direct link is not activated or deactivated, where the deactivation is that the activation is prohibited when the data transmission of the direct link is in an activated state.

In addition, under the condition that the first threshold set comprises a plurality of threshold values, the first user equipment determines the activation number corresponding to the value range to which the value of the channel state information belongs according to a first corresponding relation between the value range and the activation number, wherein the value range in the first corresponding relation is determined according to the plurality of threshold values in the first threshold set; and the first user equipment takes the determined activation number as the number of leg of the data transmission of the activated direct link.

It should be noted that, when the number of the channel state information threshold values is multiple, the leg corresponding to the threshold value range of the first threshold set may be activated. Such as: the first threshold set comprises a threshold value 1, a threshold value 2 and a threshold value 3, two value ranges are determined according to the threshold value 1, the threshold value 2 and the threshold value 3, the two value ranges are respectively a value range 1 and a value range 2, a value range 1 corresponds to the value range 1 and is a threshold value range from 1 to 2, a value range 2 corresponds to the value range 2 is a threshold value range from 2 to 3, the number of activations corresponding to the value range 1 is N1, and the number of activations corresponding to the value range 1 is N2. And if the measured channel state information value is between the value range 1, namely between the threshold value 1 and the threshold value 2, wherein the activation number corresponding to the value range 1 is N1, correspondingly activating N1 legs for data retransmission. If the measured value of the channel state information is located between the value range 2, that is, between the threshold value 2 and the threshold value 3, and the activation number corresponding to the value range 2 is N2, N2 legs are correspondingly activated to perform data retransmission.

If the target channel state information is multiple, parameters in the channel state information need to be compared with values in the first threshold set respectively, and when the value of at least one parameter is inconsistent with the specification of the first threshold set, the repeated transmission of the data of the direct link is determined to be activated. Such as: the target channel state information is CSI, CQI and RI, and when at least one of the three parameters has a value smaller than or equal to at least one threshold value in the first threshold set, the repeated transmission of the data of the direct link is determined to be activated; and when the three parameters are all larger than all threshold values in the first threshold set, the repeated data transmission of the through link is not activated or deactivated.

In addition, different target channel state information may also be compared with multiple threshold sets in the corresponding first threshold set to determine whether to activate data retransmission of the direct link, such as: the target channel state information is CSI and CQI, the first threshold set respectively corresponds to a threshold set 1 and a threshold set 2, and when the value of the CSI is smaller than or equal to at least one threshold value in the threshold set 1 and the value of the CQI is smaller than or equal to at least one threshold value in the threshold set 2, the repeated transmission of the direct connection data is activated; when the value of the CSI is less than or equal to at least one threshold value in the threshold set 1 and the value of the CQI is greater than at least one threshold value in the threshold set 2, activating the repeated transmission of the direct connection transmission data; when the value of the CSI is larger than at least one threshold value in the threshold set 1 and the value of the CQI is smaller than or equal to at least one threshold value in the threshold set 2, activating the repeated transmission of the direct connection transmission data; and when the value of the CSI is larger than at least one threshold value in the threshold set 1 and the value of the CQI is larger than at least one threshold value in the threshold set 2, the repeated transmission of the direct connection transmission data is not activated or deactivated.

In addition, when the scheme is applied to multicast communication or broadcast communication, if a plurality of second user equipments are provided, an average value of target channel state information sent by the plurality of second user equipments may be obtained, or a worst value of information in channel state information fed back by the plurality of second user equipments is determined, and if it is determined that the average value or the worst value does not meet a first threshold set specification, data retransmission of the direct link is activated; and when the average value or the worst value is determined to meet the specification of the first threshold set, the repeated data transmission of the through link is not activated or deactivated.

Wherein the threshold values of the first set of thresholds may be network configurable, or pre-configured. For example, for a connected terminal, the network is configured by a dedicated signaling, for an on-network terminal, the network is configured by a broadcast signaling, and for an off-network terminal, the channel state information threshold is configured in a pre-configured manner. Alternatively, for any terminal, the channel state information threshold value may be configured in a preconfigured manner.

If the channel quality is information 2, the HARQ information includes at least one of the following parameters: ACK, NACK, and DTX. The first user equipment may determine whether to activate data retransmission of the through link in the following manner.

Mode 2, based on the received HARQ information fed back by the second user equipment, comparing the HARQ information with a second threshold set.

If the HARQ information is one of the parameters of the upper number, the second threshold set may be set to be a set of specific values, and when the value of the HARQ information parameter is not in accordance with the specification of the second threshold set (i.e., is less than or equal to at least one of the thresholds of the second threshold set, or is greater than or equal to at least one of the thresholds of the second threshold set), the data retransmission of the direct link is activated, for example: if the HARQ information is ACK, when the feedback quantity of the ACK is determined to be smaller than or equal to at least one threshold value of the second threshold set, activating data repeated transmission of the through link; and when the feedback quantity of the ACK is determined to be larger than all threshold values in the second threshold set, the data repeated transmission of the through link is not activated or deactivated. If the HARQ information is NACK, when the feedback quantity of the NACK is determined to be larger than or equal to at least one threshold value of the second threshold set, the data repeat transmission of the direct link is activated; and when the feedback quantity of the NACKs is determined to be smaller than all the threshold values in the second threshold set, the data repeated transmission of the direct link is not activated or deactivated. Specifically, whether the threshold value is smaller than or equal to the threshold value of the second threshold set or larger than or equal to the threshold value of the second threshold set may be determined according to the selected parameter value of the HARQ information, which is not specifically limited herein.

Under the condition that the second threshold set comprises a plurality of thresholds, the first user equipment determines the activation number corresponding to the value range to which the value of the target value belongs according to a second corresponding relation between the value range and the activation number, wherein the value range in the second corresponding relation is determined according to the plurality of thresholds in the second threshold set; and the first user equipment takes the determined activation number as the number of leg of the data transmission of the activated direct link.

In addition, when the number of the threshold values in the second threshold set is multiple, the leg corresponding to the threshold value range of the second threshold set may be activated. Such as: the second threshold set comprises a threshold value 3, a threshold value 4 and a threshold value 5, two value ranges are determined according to the threshold value 3, the threshold value 4 and the threshold value 5, the two value ranges are a value range 1 and a value range 2 respectively, a value interval corresponding to the value range 1 is the threshold value 3-the threshold value 4, a value interval corresponding to the value range 2 is the threshold value 4-the threshold value 5, the activation number corresponding to the value range 1 is N1, and the activation number corresponding to the value range 1 is N2. The measured HARQ information value is located between the value range 1, that is, between the threshold value 3 and the threshold value 4, where the activation number corresponding to the value range 1 is N1, and then N1 legs are correspondingly activated to perform data retransmission. If the measured value of the channel state information is located between the value range 2, that is, between the threshold value 4 and the threshold value 5, and the activation number corresponding to the value range 2 is N2, activating N2 legs correspondingly for data retransmission.

If there are multiple HARQ information, the parameters in the HARQ information need to be compared with the values in the second threshold set, and when there is a discrepancy between the value of at least one parameter and the specification of the second threshold set (i.e., at least one threshold value less than or equal to the second threshold set, or at least one threshold value greater than or equal to the second threshold set), it is determined to activate the data retransmission of the direct link. Such as: the HARQ information is NACK and DTX, when at least one of the two parameters has a value which is larger than or equal to at least one threshold value in the second threshold set, the repeated transmission of the data of the direct link is determined to be activated; and when the two parameters are smaller than all threshold values in the second threshold set, the repeated data transmission of the through link is not activated or deactivated.

In addition, the different HARQ information may also be compared with multiple threshold sets in the corresponding second threshold set to determine whether to activate data retransmission of the direct link, such as: the HARQ information is NACK and DTX, the HARQ information respectively corresponds to a threshold set 1 and a threshold set 2 in a second threshold set, and when the value of NACK is smaller than at least one threshold value in the threshold set 1 and the value of DTX is smaller than at least one threshold value in the threshold set 2, the repeated transmission of the direct connection data is not activated or deactivated; when the value of NACK is less than at least one threshold value in the threshold set 1 and the value of DTX is greater than or equal to at least one threshold value in the threshold set 2, activating the repeated transmission of the direct connection transmission data; when the value of NACK is larger than or equal to at least one threshold value in the threshold set 1 and the value of DTX is smaller than at least one threshold value in the threshold set 2, activating the repeated transmission of the direct connection transmission data; and when the value of NACK is greater than or equal to at least one threshold value in the threshold set 1 and the value of DTX is greater than or equal to at least one threshold value in the threshold set 2, activating the repeated transmission of the data of the direct connection transmission.

In addition, when the scheme is applied to multicast communication or broadcast communication, if a plurality of second user equipments are provided, an average value of HARQ information sent by the plurality of second user equipments may be obtained, or a worst value of information in channel state information fed back by the plurality of second user equipments is determined, and when the average value or the worst value is determined to be less than or equal to at least one threshold value in the second threshold set, data retransmission of the direct link is activated; and when the average value or the worst value is determined to be larger than all threshold values in the second threshold set, the repeated data transmission of the direct link is not activated or deactivated.

If data transmission is carried out between the first user equipment and the second user equipment through unicast communication, the target value is the number of designated information in the HARQ information fed back by the second user equipment, or the target value is the ratio of the number of the designated information to the number of the fed-back HARQ information; wherein, the designated information is NACK and/or DTX, or the designated information is ACK. Such as: the first user equipment and the second user equipment communicate through unicast, and it is known that the number of the second user equipment is 1, and when the HARQ information is ACK, the target value may be the number of ACKs that the second user equipment can directly feed back, or a value obtained after the number of ACKs is 1 compared with the number of the second user equipment.

If data transmission is carried out between the first user equipment and the second user equipment through multicast or broadcast communication, the target value is the ratio of the number of the designated information in the HARQ information fed back by the second user equipment to the number of the fed-back HARQ information; or if the first user equipment and the second user equipment perform data transmission through multicast communication, the target value is the ratio of the designated information to the number of the second user equipment in the multicast; wherein, the designated information is NACK and/or DTX, or the designated information is ACK. Such as: the first user equipment and the second user equipment communicate through multicast, and it can be known that the number of the second user equipment in the multicast group is 5, and when the HARQ information is NACK and DTX, the target value may be a ratio of the number of NACK and DTX directly fed back by the second user equipment to the number of the second user equipment in the multicast group.

In addition, if a plurality of thresholds in the second threshold set are provided, the leg corresponding to the threshold value range of the second threshold set may be activated to perform data transmission between the first user equipment and the second user equipment through multicast or broadcast communication. Such as: for multicast communication, if the ratio of the HARQ information value fed back by the multicast group to the number of the second user equipments in the multicast group is between two thresholds, that is, between threshold 3 and threshold 4, where the activation number corresponding to the value range of threshold 3 and threshold 4 is N1, then N1 legs are correspondingly activated for data retransmission. And if the measured channel state information value is between a threshold value 4 and a threshold value 5, wherein the activation number corresponding to the value range of the threshold value 4 and the threshold value 5 is N2, correspondingly activating N2 legs for data retransmission.

Wherein the threshold values of the second set of threshold values may be network configurable, or pre-configured. For example, for a connected terminal, the network is configured by a dedicated signaling, for an on-network terminal, the network is configured by a broadcast signaling, and for an off-network terminal, the channel state information threshold is configured in a pre-configured manner. Alternatively, for any terminal, the channel state information threshold value may be configured in a preconfigured manner.

In addition, it should be noted that, when the channel quality is information 1 and information 2, the acquired information 1 may be compared with a corresponding first threshold set, the acquired information 2 may be compared with a corresponding second threshold set, and when at least one piece of information does not meet the threshold specification, the data retransmission of the direct link is activated; and when both the two pieces of information accord with the threshold regulation, the data repeated transmission of the direct link is not activated or deactivated. Such as: the channel quality is determined by CSI, CRI and ACK, when the CSI and the CRI are less than or equal to at least one value in the first threshold set, and when the ACK is greater than at least one value in the second threshold set, the data repeated transmission of the through link is activated; when the CSI and the CRI are larger than at least one value in the first threshold set, and when the ACK is larger than at least one value in the second threshold set, the repeated data transmission of the through link is not activated or deactivated; when the CSI and the CRI are less than or equal to at least one value in the first threshold set, and when the ACK is less than or equal to at least one value in the second threshold set, activating data repeated transmission of the direct link; and when the CSI and the CRI are larger than at least one value in the first threshold set, and when the ACK is smaller than or equal to at least one value in the second threshold set, activating the data repeated transmission of the through link.

In addition, the first user equipment may determine whether to activate data retransmission of the direct link according to mode 1 and/or mode 2. The specific manner of selection is not particularly limited herein.

Next, how to activate data retransmission according to the indication information will be described from the perspective of the pointing device, the indication information of the pointing device may be determined by determining the channel quality method in the above-described manner 1 and/or manner 2. And sending indication information to the first user equipment, wherein the indication information can carry at least one of the following information:

information indicating that data retransmission of the first user equipment through link is activated;

information indicating the number of legs activating data transmission of the first user equipment through link;

information indicating the number of leg activating data repeated transmission of the first user equipment through link and activating data transmission of the first user equipment through link;

information indicating that data retransmission of the first user equipment direct link is not activated or deactivated;

information indicating the number of legs for data transmission without activating or deactivating the through link;

and the information indicates the number of legs for not activating or deactivating the data repeated transmission of the through link and not activating or deactivating the data transmission of the through link.

Through the sending of the determined indication information, the first user equipment can directly execute corresponding operation according to the execution information.

When the indicating device is the second user equipment, the indicating information is sent to the first user equipment through one of a sidelink Radio Resource Control (SL RRC) and a sidelink MAC Control Element (SL MAC CE). When the indication device is a network side device, the indication information is sent to the first user equipment through one of media access Control elements (MAC CE) through a Radio Resource Control (RRC) RRC.

Taking NR system as an example, for illustration, a schematic diagram of the first user equipment determining whether to activate data retransmission of the direct link according to the channel quality is shown in fig. 4, where the UE1 first performs step 1: sending service information and/or reference signals to the UE2, in step 2, the UE2 feeds back channel state information or HARQ information to the UE1, in step 3, the UE1 determines whether to activate retransmission according to a configured or preconfigured threshold value, step 4: and if the repeated transmission is determined to be activated and the number of the legs for activating the repeated transmission is determined, the repeated transmission mode is used for sending the service information to the UE 2.

Fig. 5 shows a schematic diagram of the first UE determining whether to activate data retransmission of the direct link according to the indication information of the second UE, where the UE1 first performs step 1: sending the service information and/or the reference signal to the UE2, the UE2 determining whether to activate the indication information of the data repeat transmission of the direct link, in step 2, the UE2 sending the indication information of whether to activate the data repeat transmission of the direct link, step 3: and if the repeated transmission is determined to be activated according to the indication information and the number of the leg of the repeated transmission is activated based on the indication information, the service information is sent to the UE2 by using the repeated transmission mode.

Fig. 6 shows a schematic diagram of the network side device determining whether to activate data retransmission of the direct link according to the indication information of the second user equipment, where the UE1 first performs step 1: sending the service information and/or the reference signal to the UE2, in step 2, the UE2 feeds back the channel state information or HARQ information to the network side device, and may also perform step 2': the UE1 feeds back the channel status or HARQ information to the network side device, the network side device determines whether to activate the indication information of the data retransmission of the direct link, in step 3, the network side device sends the indication information whether to activate the data retransmission of the direct link to the UE1, and step 4: and if the repeated transmission is determined to be activated according to the indication information and the number of the leg of the repeated transmission is activated based on the indication information, the service information is sent to the UE2 by using the repeated transmission mode.

Referring to fig. 7, a data retransmission activation method provided in the embodiment of the present application includes:

step 701: the first user equipment determines whether to activate the data repeat transmission of the direct link according to the channel quality or the indication information of the indication equipment; the indication device is a network side device accessed by the first user device or a second user device communicated with the first user device.

In one embodiment, the method further comprises:

and the first user equipment determines the number of legs for activating the data transmission of the through link according to the channel quality or the indication information of the indication equipment.

In one embodiment, the channel quality is determined from at least one of the following information:

In one embodiment, the first user equipment determining whether to activate data retransmission for a direct link includes:

In one embodiment, when the first threshold set includes multiple threshold values, the determining, by the first user equipment, the number of legs for activating data transmission of the direct link according to the channel quality includes:

In one embodiment, the channel state information includes at least one of the following parameters:

In one embodiment, the HARQ information comprises at least one of the following parameters:

In one embodiment, when the second threshold set includes multiple thresholds, the determining, by the first user equipment, the number of legs for activating data transmission of the direct link according to channel quality includes:

In an embodiment, if data transmission is performed between the first user equipment and the second user equipment through unicast communication, the target value is the number of designated information in HARQ information fed back by the second user equipment, or the target value is a ratio of the number of the designated information to the number of the fed-back HARQ information;

In an embodiment, if data transmission is performed between the first user equipment and the second user equipment through multicast or broadcast communication, the target value is a ratio of the number of designated information in the HARQ information fed back by the second user equipment to the number of the HARQ information fed back; alternatively, the first and second electrodes may be,

In one embodiment, the information carried in the indication information includes at least one of:

Referring to fig. 8, a schematic flow chart of a data retransmission activation method is provided in an embodiment of the present application, where the method includes:

step 801: the method comprises the steps that indication information is sent to first user equipment by the indication equipment, wherein the indication information is used for indicating whether the first user equipment activates data repeated transmission of a direct link or not; the indication device is a network side device accessed by the first user device or a second user device communicated with the first user device.

In one embodiment, the indication device determines the number of legs for activating data transmission of the through link according to the indication information.

In one embodiment, the indication information is determined by a channel quality acquired by the second user equipment.

In one embodiment, the indication is determined by:

In one embodiment, in the case where a plurality of threshold values are included in the first set of thresholds; the indicating equipment determines the number of legs for activating the data transmission of the through link according to the channel quality, and the method comprises the following steps:

In one embodiment, the indication is determined by:

In one embodiment, in the case where a plurality of threshold values are included in the second set of thresholds; the indicating equipment determines the number of legs for activating the data transmission of the through link according to the channel quality, and the method comprises the following steps:

Based on the same inventive concept, referring to fig. 9, a schematic structural diagram of the first user equipment provided in the embodiment of the present application is shown. As shown, the communication device may include: a processor 901, a memory 902, a transceiver 903, and a bus interface 904.

The processor 901 is responsible for managing a bus architecture and general processing, and the memory 902 may store data used by the processor 901 in performing operations. The transceiver 903 is used for receiving and transmitting data under the control of the processor 901.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 901, and various circuits, represented by memory 902, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 901 is responsible for managing a bus architecture and general processing, and the memory 902 may store data used by the processor 901 in performing operations.

The process disclosed in the embodiment of the present invention may be applied to the processor 901, or implemented by the processor 901. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 901. The processor 901 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 902, and the processor 901 reads the information in the memory 902, and completes the steps of the signal processing flow in combination with the hardware thereof.

Specifically, the processor 901 is configured to read the computer instructions in the memory 902 and execute the following processes:

Optionally, the processor is further configured to perform: and determining the number of the legs for activating the data transmission of the through link according to the channel quality or the indication information of the indication equipment.

Optionally, when the second threshold set includes multiple thresholds, the determining, by the first user equipment, the number of legs for activating data transmission of the direct link according to the channel quality includes:

Based on the same inventive concept, referring to fig. 10, a schematic structural diagram of a pointing device provided in an embodiment of the present application is shown. As shown, the pointing device may include: a processor 1001, a memory 1002, a transceiver 1003, and a bus interface 1004.

The processor 1001 is responsible for managing the bus architecture and general processing, and the memory 1002 may store data used by the processor 1001 in performing operations. The transceiver 1003 is used for receiving and transmitting data under the control of the processor 1001.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 1001, and various circuits, represented by the memory 1002, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 1001 is responsible for managing the bus architecture and general processing, and the memory 1002 may store data used by the processor 1001 in performing operations.

The process disclosed in the embodiment of the present invention may be applied to the processor 1001, or implemented by the processor 1001. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 1001. The processor 1001 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1002, and the processor 1001 reads the information in the memory 1002 and completes the steps of the signal processing flow in combination with the hardware thereof.

Specifically, the processor 1001 is configured to read the computer instructions in the memory 1002 and execute the following processes:

Optionally, the processor determines the number of legs activating data transmission of the through link according to the indication information.

Optionally, the indication information is determined by channel quality acquired by the second user equipment.

Optionally, the processor determines the indication information, and executes:

Fig. 11 is a schematic structural diagram of a data retransmission activation device provided in the present application, where the device includes:

a determining module 110, configured to determine whether to activate data retransmission of the direct link according to channel quality or indication information of an indication device;

Optionally, the apparatus further comprises: and the number-of-legs determining module is used for determining the number of legs for activating the data transmission of the through link according to the channel quality or the indication information of the indication equipment.

Optionally, the determining module is specifically configured to:

Fig. 12 is a schematic structural diagram of a data retransmission activation device provided in the present application, where the device includes:

a sending module 120, configured to send indication information to a first user equipment, where the indication information is used to indicate whether the first user equipment activates data retransmission of a direct link;

Optionally, the indication device determines, according to the indication information, the number of legs activating data transmission of the through link.

Optionally, the indication information is determined by channel quality.

Optionally, the apparatus further comprises: an indication information determining module, configured to determine, by the indication device, indication information according to a comparison result between the channel state information and a first threshold set if the channel quality is determined according to the channel state information of the target channel, where the first threshold set includes at least one threshold value.

Optionally, when the first threshold set includes multiple threshold values, the indication information determining module is specifically configured to:

Optionally, the indication information determining module is specifically configured to:

Optionally, in a case that the second threshold set includes multiple thresholds, the indication information determining module is specifically configured to:

An embodiment of the present application further provides a computer-readable non-volatile storage medium, which includes a computer program, and when the computer program runs on a computer, the computer program is configured to enable the computer to execute the steps of the communication method between the user terminals according to the embodiment of the present application.

The present application is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the application. It will be understood that one block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.

Accordingly, the subject application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for activating data retransmission, the method comprising:

2. The method of claim 1, further comprising:

and the first user equipment determines the number of the channels leg for activating the data transmission of the through link according to the channel quality or the indication information of the indication equipment.

3. The method of claim 2, wherein the channel quality is determined according to at least one of the following information:

4. The method of claim 3, wherein the first user equipment determining whether to activate data retransmission for the pass-through link comprises:

5. The method of claim 4, wherein in a case that the first threshold set includes multiple threshold values, the determining, by the first user equipment, the number of legs for data transmission of the active direct link according to the channel quality comprises:

6. The method of claim 4, wherein the channel state information comprises at least one of the following parameters:

7. The method of claim 3, wherein the first user equipment determining whether to activate data retransmission for the pass-through link comprises:

8. The method of claim 7, wherein the HARQ information comprises at least one of the following parameters:

9. The method according to claim 7, wherein in a case that the second threshold set includes multiple threshold values, the determining, by the first user equipment, the number of legs for data transmission of the active direct link according to the channel quality includes:

10. The method according to claim 9, wherein if data transmission is performed between the first user equipment and the second user equipment through unicast communication, the target value is the number of pieces of designated information in HARQ information fed back by the second user equipment, or the target value is a ratio of the number of pieces of designated information to the number of pieces of HARQ information fed back;

11. The method according to claim 9, wherein if the first ue and the second ue perform data transmission through multicast or broadcast communication, the target value is a ratio of a number of designated HARQ information fed back by the second ue to a number of HARQ information fed back; alternatively, the first and second electrodes may be,

12. The method of claim 2, wherein the carried information in the indication information comprises at least one of:

13. A method for activating data retransmission, the method comprising:

14. The method according to claim 13, wherein the indication device determines the number of legs of the channel activating the data transmission of the through link according to the indication information.

15. The method according to any of claims 13-14, wherein said indication information is determined by channel quality.

16. The method of claim 15, wherein the channel quality is determined according to at least one of the following information:

17. The method of claim 16, wherein the indication information is determined by:

18. The method of claim 17, wherein in a case that the first threshold set includes a plurality of threshold values, the determining, by the pointing device, the number of legs for data transmission activating the through link according to the channel quality comprises:

19. The method of claim 17, wherein the channel state information comprises at least one of the following parameters:

20. The method of claim 16, wherein the indication information is determined by:

21. The method of claim 20, wherein the HARQ information comprises at least one of the following parameters:

22. The method of claim 20, wherein in a case that the second threshold set includes a plurality of threshold values, the indicating device determines, according to the channel quality, the number of legs for activating data transmission of the direct link, including:

23. The method according to claim 22, wherein if data transmission is performed between the first ue and the second ue through unicast communication, the target value is the number of pieces of designated information in the HARQ information fed back by the second ue, or the target value is a ratio of the number of pieces of designated information to the number of pieces of HARQ information fed back;

24. The method according to claim 22, wherein if the first ue and the second ue perform data transmission through multicast or broadcast communication, the target value is a ratio of a number of designated HARQ information fed back by the second ue to a number of HARQ information fed back; alternatively, the first and second electrodes may be,

25. The method of claim 14, wherein the carried information in the indication information comprises at least one of:

26. A first user device, comprising: a processor, memory, transceiver;

27. The apparatus of claim 26, wherein the processor is further configured to perform: and determining the number of the channels leg for activating the data transmission of the through link according to the channel quality or the indication information of the indication equipment.

28. The apparatus of claim 27, wherein the channel quality is determined according to at least one of the following information:

29. The apparatus of claim 28, wherein the processor determines whether to activate data retransmission for a pass-through link by:

30. The apparatus of claim 28, wherein the processor determines whether to activate data retransmission for a pass-through link by:

31. A pointing device, comprising: a processor, memory, transceiver;

32. The apparatus of claim 31, wherein the processor determines the number of leg channels for activating data transmission of the through link according to the indication information.

33. The apparatus of any of claims 31-32, wherein the indication information is determined by channel quality.

34. The apparatus of claim 33, wherein the channel quality is determined according to at least one of the following information:

35. The apparatus of claim 34, wherein the processor determines the indication information and performs:

and if the channel quality is the channel state information of the target channel, determining indication information according to a comparison result of the channel state information and a first threshold set, wherein the first threshold set comprises at least one threshold value.

36. The apparatus of claim 34, wherein determining the indication information by the processor performs:

if the channel quality is the HARQ information fed back by the second user equipment, determining a target value according to the HARQ information fed back by the second user equipment;

37. An apparatus for activating data retransmission, the apparatus comprising:

38. An apparatus for activating data retransmission, the apparatus comprising:

39. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 12 or 13 to 25.