CN117460067A

CN117460067A - Direct communication interface repeated transmission control method, terminal and network equipment

Info

Publication number: CN117460067A
Application number: CN202210828499.XA
Authority: CN
Inventors: 赵亚利
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2024-01-26
Also published as: WO2024012149A1

Abstract

The embodiment of the application provides a repeated transmission control method of a direct communication interface, a terminal and network equipment, and relates to the technical field of wireless communication. After receiving the auxiliary information sent by the receiving terminal, the sending terminal can control the repeated transmission of the direct communication interface PDCP based on the auxiliary information.

Description

Direct communication interface repeated transmission control method, terminal and network equipment

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a method, a terminal, and a network device for controlling repeated transmission of a direct communication interface.

Background

In order to improve the reliability of unicast transmission of the fifth generation (5th Generation,5G) direct communication interface, a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) retransmission mechanism may be introduced in a New air interface (NR) direct communication interface of 5G with reference to a long term evolution (Long Term Evolution, LTE) direct communication interface design.

The LTE direct communication interface determines whether to configure or activate PDCP retransmission according to a quality of service (Quality of Service, qoS) parameter of a direct communication interface radio bearer, for example, the terminal determines whether to configure or activate PDCP retransmission according to a direct communication interface reliability (Per Packet Pro Se Reliability, PPPR) threshold of each packet configured by the base station. If the 5G NR continues to use the LTE mechanism to perform the configuration or activation of PDCP retransmission, the PDCP retransmission may be configured or activated under the condition that the channel quality of the direct communication interface is good, thereby causing waste of direct communication interface resources.

Disclosure of Invention

The embodiment of the application provides a direct communication interface repeated transmission control method, a terminal and network equipment, which avoid unnecessary configuration or activation of the repeated transmission of a direct communication interface PDCP, thereby improving the utilization rate of direct communication interface resources.

In a first aspect, an embodiment of the present application provides a method for controlling repeated transmission of a direct communication interface, which is applied to a sending terminal, where the method includes:

receiving auxiliary information sent by a receiving terminal; the receiving terminal is a terminal which performs unicast communication with the sending terminal through a direct communication interface;

And controlling the repeated transmission of the direct communication interface packet data convergence protocol PDCP based on the auxiliary information.

In an alternative embodiment, the auxiliary information includes one or more of the following information:

indication information of desired configuration or activation of PDCP repeat transmission;

indication information of desire to reconfigure or deactivate PDCP repeat transmission;

identification information of a direct communication interface radio bearer, SLRB, for which configuration or activation of PDCP repeat transmission is desired;

identification information of an SLRB for which it is desired to reconfigure or deactivate PDCP repeat transmission;

identification information of a carrier and/or partial bandwidth BWP of a direct communication interface for which PDCP retransmission is desired to be configured or activated;

it is desirable to de-configure or deactivate identification information of carriers and/or BWP of the direct communication interface of PDCP retransmission.

In an alternative embodiment, controlling the direct communication interface packet data convergence protocol PDCP repeat transmission based on the assistance information comprises:

if the sending terminal is in a Radio Resource Control (RRC) connection state at a Uu interface or the sending terminal is in the RRC connection state at the Uu interface and the network configures a resource allocation mode of the sending terminal using network scheduling, sending the auxiliary information to the network equipment; the network device refers to a network device for providing services for the sending terminal;

Receiving the PDCP repeated transmission control information sent by the network equipment;

and controlling the PDCP repeated transmission of the direct communication interface packet data convergence protocol according to the PDCP repeated transmission control information.

In an alternative embodiment, the controlling the direct communication interface packet data convergence protocol PDCP repeat transmission based on the assistance information includes:

if the sending terminal is in an RRC idle state or an RRC inactive state at the Uu interface, generating PDCP repeated transmission control information according to the auxiliary information or according to the auxiliary information and broadcast information of a network;

if the sending terminal is in an off-network state, generating PDCP repeated transmission control information according to the auxiliary information or according to the auxiliary information and the pre-configuration information;

In an alternative embodiment, the direct communication interface PDCP repeat transmission is controlled based on a set granularity; the set granularity comprises any one of the following:

a direct communication interface L2 destination address;

a combination of a direct communication interface L2 source address and a direct communication interface L2 destination address;

a combination of a direct communication interface L2 destination address and a direct communication radio bearer SLRB;

a combination of a direct communication interface L2 source address, a direct communication interface L2 destination address, and a SLRB.

In an alternative embodiment, if the set granularity is the target address of the direct communication interface L2, the PDCP retransmission control information includes at least one of the following information:

the PDCP corresponding to the target address of the direct communication interface L2 repeatedly transmits the configuration or activated indication information;

the PDCP corresponding to the target address of the direct communication interface L2 repeatedly transmits the indication information of configuration removal or deactivation;

identification information of the carrier and/or partial bandwidth BWP corresponding to each path for PDCP repeat transmission configured for the direct communication interface L2 target address.

In an alternative embodiment, if the set granularity is a combination of a direct communication interface L2 source address and a direct communication interface L2 destination address, the PDCP repeat transmission control information includes at least one of the following information:

The direct communication interface L2 source address and the direct communication interface L2 target address are combined to correspond to PDCP repeated transmission to carry out configuration or activation indication information;

the direct communication interface L2 source address and the direct communication interface L2 target address are combined and correspond to PDCP repeated transmission to carry out de-configuration or de-activation indication information;

identification information of carriers and/or partial bandwidth BWP corresponding to each path for PDCP repeat transmission configured for the direct communication interface L2 source address and the direct communication interface L2 destination address combination.

In an alternative embodiment, if the set granularity is a combination of a direct communication interface L2 target address and a direct communication radio bearer SLRB, the PDCP repeat transmission control information includes at least one of the following information:

indication information for configuring or activating PDCP repeated transmission corresponding to the direct communication interface L2 target address and the appointed SLRB combination;

indication information for performing configuration or deactivation by PDCP repeated transmission corresponding to the direct communication interface L2 target address and the appointed SLRB combination;

identification information of carriers and/or partial bandwidth BWP corresponding to each path for PDCP repeat transmission configured for the direct communication interface L2 target address and the designated SLRB combination.

In an alternative embodiment, if the set granularity is a combination of a direct communication interface L2 source address, a direct communication interface L2 destination address, and an SLRB, the PDCP retransmission control information includes at least one of the following information:

indication information for configuring or activating PDCP repeated transmission corresponding to the direct communication interface L2 source address, the direct communication interface L2 target address and the appointed SLRB combination;

indication information for performing configuration or deactivation by PDCP repeated transmission corresponding to a direct communication interface L2 source address, a direct communication interface L2 target address and a designated SLRB combination;

identification information of carriers and/or partial bandwidth BWP corresponding to each path for PDCP repeat transmission configured for the direct communication interface L2 source address, the direct communication interface L2 destination address, and the designated SLRB.

In an alternative embodiment, after the generating PDCP repeat transmission control information, the method further includes:

transmitting the PDCP repeated transmission control information to the receiving terminal; the PDCP repeat transmission control information is carried by direct communication interface related messages.

In an alternative embodiment, the direct communication interface related message includes at least one of:

A radio resource control, PC5-RRC, message of the direct communication interface;

the medium access layer control unit MAC CE of the direct communication interface.

In a second aspect, an embodiment of the present application provides a method for controlling repeated transmission of a direct communication interface, which is applied to a receiving terminal, and the method includes:

generating auxiliary information for the direct communication interface; the auxiliary information is used for assisting a sending terminal or network equipment for providing service for the sending terminal to control the repeated transmission of the direct communication interface packet data convergence protocol PDCP; the sending terminal is a terminal which performs unicast communication with the receiving terminal through the direct communication interface;

and sending the auxiliary information to the sending terminal.

In an alternative embodiment, if the assistance information includes indication information that PDCP repeat transmission is desired to be configured or activated, the generating assistance information for the direct communication interface includes:

generating the auxiliary information when the first condition is detected to be met; the first condition includes at least one of the following conditions:

the channel quality of the receiving terminal on at least one carrier wave or BWP used by the direct communication interface is lower than a set quality threshold;

the channel occupation CO of the receiving terminal on at least one carrier wave or BWP used by a direct communication interface is higher than a set CO threshold;

the receiving terminal is higher than a set CBR threshold when the channel on at least one carrier or BWP used by a direct communication interface is busy than CBR;

the receiving terminal fails Listen Before Talk (LBT) on at least one carrier or BWP used by a direct communication interface;

the number of times that at least one hybrid automatic repeat request (HARQ) process of the receiving terminal direct communication interface generates continuous HARQ non-acknowledgement messages (NACK) is higher than a first threshold;

and the number of Radio Link Control (RLC) Service Data Units (SDUs) fed back as NACK by continuous ARQ corresponding to at least one SLRB of the direct communication interface of the receiving terminal is higher than a second threshold.

In an alternative embodiment, if the assistance information includes indication information that the PDCP repeat transmission is desired to be de-configured or de-activated, the generating assistance information for the direct communication interface includes:

generating the auxiliary information when the second condition is detected to be met; the second condition includes at least one of the following conditions:

the channel quality of the receiving terminal on each carrier wave or BWP used by the direct communication interface is higher than or equal to a set quality threshold;

the CO of the receiving terminal on each carrier wave or BWP used by the direct communication interface is lower than a set CO threshold;

the CBR of the receiving terminal on each carrier wave or BWP used by the direct communication interface is lower than a set CBR threshold;

the number of times that at least one HARQ process of the receiving terminal direct communication interface generates continuous HARQ NACK is lower than a first threshold;

and the number of the RLC SDUs with the continuous ARQ feedback of NACK corresponding to at least one SLRB of the direct communication interface of the receiving terminal is lower than a second threshold.

In an alternative embodiment, if the assistance information includes identification information of an SLRB for which PDCP retransmission is desired to be configured or activated, the generating assistance information for the direct communication interface includes:

Generating the auxiliary information based on the identification information of the SLRB satisfying the third condition; the third condition includes at least one of the following conditions:

the channel quality on at least one carrier or BWP used by SLRB is lower than a set quality threshold;

the CO on at least one carrier or BWP used by SLRB is higher than a set CO threshold;

CBR on at least one carrier or BWP used by the SLRB is above a set CBR threshold;

LBT failure occurs for at least one carrier or BWP used by the SLRB;

the number of times that at least one HARQ process corresponding to the SLRB generates continuous HARQ NACK is higher than a first threshold;

the number of RLC SDUs for which ARQ feedback is NACK corresponding to the SLRB is higher than a second threshold.

In an alternative embodiment, if the assistance information includes identification information of an SLRB for which a PDCP repeat transmission is desired to be de-configured or de-activated, the generating assistance information for the direct communication interface includes:

generating the auxiliary information based on the identification information of the SLRB satisfying the fourth condition; the fourth condition includes at least one of the following conditions:

the channel quality on each carrier wave or BWP used by SLRB is higher than or equal to the set quality threshold;

the CO on each carrier wave or BWP used by SLRB is lower than a set CO threshold;

CBR on each carrier or BWP used by the SLRB is below a set CBR threshold;

the number of times that at least one HARQ process corresponding to the SLRB generates continuous HARQ NACK is lower than a first threshold;

the number of RLC SDUs for which consecutive ARQ feedback for SLRBs is NACK is lower than a second threshold.

In an alternative embodiment, if the auxiliary information includes identification information of a carrier and/or BWP of a direct communication interface for which PDCP retransmission is desired to be configured or activated, the generating auxiliary information for the direct communication interface includes:

generating the auxiliary information based on the identification information of the carrier wave and/or BWP of the direct communication interface meeting the fifth condition; the fifth condition includes at least one of the following conditions:

the channel quality on the carrier or BWP is below a set quality threshold;

CO on carrier or BWP is above the set CO threshold;

CBR on carrier or BWP is above the set CBR threshold;

LBT failure occurs on carrier or BWP;

the number of consecutive HARQ NACKs occurring for at least one HARQ process corresponding to the SLRB transmitted over a carrier or BWP is higher than a first threshold;

the number of RLC SDUs fed back as NACKs by consecutive ARQ corresponding to SLRBs transmitted over a carrier or BWP is higher than a second threshold.

In an alternative embodiment, the assistance information includes identification information of a carrier and/or BWP of a direct communication interface for which the PDCP retransmission is desired to be de-configured or de-activated, the generating assistance information for the direct communication interface includes:

Generating the auxiliary information based on the identification information of the carrier wave and/or BWP of the direct communication interface meeting the sixth condition; the sixth condition includes at least one of the following conditions:

the channel quality on the carrier or BWP is higher than or equal to the set quality threshold;

CO on carrier or BWP is below the set CO threshold;

CBR on carrier or BWP is below the set CBR threshold;

the number of times that at least one HARQ process corresponding to the SLRB transmitted through the carrier or BWP generates continuous HARQ NACK is lower than or equal to a first threshold;

the number of RLC SDUs fed back as NACKs by consecutive ARQ corresponding to SLRBs transmitted over a carrier or BWP is below a second threshold.

In an alternative embodiment, the assistance information is carried by a radio resource control, PC5-RRC, message of the direct communication interface, or by a direct communication interface media access layer control unit, MAC CE.

In an alternative embodiment, before the generating the assistance information for the direct communication interface, the method further comprises:

sending first indication information to the sending terminal; and/or receiving second indication information sent by the sending terminal;

the first indication information is used for indicating the receiving terminal to support PDCP repeated transmission control or indicating protocol version information supported by the receiving terminal; the second indication information is used for indicating the sending terminal to support PDCP repeated transmission control or indicating protocol version information supported by the sending terminal.

In an alternative embodiment, after the sending the auxiliary information to the sending terminal, the method further includes:

receiving PDCP repeated transmission control information sent by the sending terminal; the PDCP repeat transmission control information is generated by the transmitting terminal or a network device serving the transmitting terminal based on the auxiliary information.

In a third aspect, an embodiment of the present application provides a method for controlling repeated transmission of a direct communication interface, which is applied to a network device, where the method includes:

receiving auxiliary information sent by a sending terminal under the condition that the network equipment and the sending terminal are in a Radio Resource Control (RRC) connection state at a Uu interface or the sending terminal is in the RRC connection state at the Uu interface and the network configures a resource allocation mode of network scheduling used by the sending terminal; the sending terminal is any direct communication sending terminal positioned in the service range of the network equipment; the auxiliary information is auxiliary information sent to the sending terminal by a direct communication receiving terminal corresponding to the sending terminal;

and transmitting the direct communication interface packet data convergence protocol PDCP repeated transmission control information to the transmitting terminal based on the auxiliary information.

In a fourth aspect, an embodiment of the present application provides a transmitting terminal, including:

a first receiving unit, configured to receive auxiliary information sent by a receiving terminal; the receiving terminal is a terminal which performs unicast communication with the sending terminal through a direct communication interface;

and the control unit is used for controlling the repeated transmission of the direct communication interface packet data convergence protocol PDCP based on the auxiliary information.

In a fifth aspect, an embodiment of the present application provides a receiving terminal, including:

A generation unit for generating auxiliary information for the direct communication interface; the auxiliary information is used for assisting a sending terminal or network equipment for providing service for the sending terminal to control the repeated transmission of the direct communication interface packet data convergence protocol PDCP; the sending terminal is a terminal which performs unicast communication with the receiving terminal through the direct communication interface;

and the first sending unit is used for sending the auxiliary information to the sending terminal.

In a sixth aspect, embodiments of the present application provide a network device, including:

a second receiving unit, configured to receive auxiliary information sent by a sending terminal when the network device and the sending terminal are in a radio resource control RRC connection state at a Uu interface or the sending terminal is in an RRC connection state at the Uu interface and the network configures a resource allocation mode in which the sending terminal uses network scheduling; the sending terminal is any direct communication sending terminal positioned in the service range of the network equipment; the auxiliary information is auxiliary information sent to the sending terminal by a direct communication receiving terminal corresponding to the sending terminal;

and the second sending unit is used for sending the direct communication interface packet data convergence protocol PDCP repeated transmission control information to the sending terminal based on the auxiliary information.

In a seventh aspect, an embodiment of the present application provides a transmitting terminal, including: a memory, a transceiver, and a processor;

the memory is used for storing computer instructions;

the transceiver is used for receiving and transmitting data under the control of the processor;

the processor is configured to read the computer program in the memory and execute the following steps:

controlling the transceiver to receive auxiliary information sent by a receiving terminal; the receiving terminal is a terminal which performs unicast communication with the sending terminal through a direct communication interface; and controlling the repeated transmission of the direct communication interface packet data convergence protocol PDCP based on the auxiliary information.

In an alternative embodiment, the processor is specifically configured to:

if the sending terminal is in a Radio Resource Control (RRC) connection state at a Uu interface or the sending terminal is in the RRC connection state at the Uu interface and the network configures a resource allocation mode of the sending terminal using network scheduling, controlling the transceiver to send the auxiliary information to the network equipment; the network device refers to a network device for providing services for the sending terminal;

controlling the transceiver to receive the PDCP repeated transmission control information sent by the network equipment;

In an alternative embodiment, the processor is specifically configured to:

a direct communication interface L2 destination address;

In an eighth aspect, an embodiment of the present application provides a receiving terminal, including: a memory, a transceiver, and a processor;

the memory is used for storing computer instructions;

And controlling the transceiver to send the auxiliary information to the sending terminal.

In an alternative embodiment, if the auxiliary information includes indication information that PDCP repeat transmission is desired to be configured or activated, the processor is specifically configured to:

In an alternative embodiment, if the auxiliary information includes indication information that the PDCP repeat transmission is desired to be de-configured or de-activated, the processor is specifically configured to:

In an alternative embodiment, if the auxiliary information includes identification information of an SLRB for which PDCP retransmission is desired to be configured or activated, the processor is specifically configured to:

LBT failure occurs for at least one carrier or BWP used by the SLRB;

In an alternative embodiment, if the auxiliary information includes identification information of SLRBs for which the PDCP repeat transmission is desired to be de-configured or de-activated, the processor is specifically configured to:

CBR on each carrier or BWP used by the SLRB is below a set CBR threshold;

In an alternative embodiment, if the auxiliary information includes identification information of a carrier and/or BWP of a direct communication interface for which PDCP retransmission is desired to be configured or activated, the processor is specifically configured to:

the channel quality on the carrier or BWP is below a set quality threshold;

CO on carrier or BWP is above the set CO threshold;

CBR on carrier or BWP is above the set CBR threshold;

LBT failure occurs on carrier or BWP;

In an alternative embodiment, the assistance information comprises identification information of a carrier and/or BWP of the direct communication interface for which it is desired to reconfigure or deactivate PDCP retransmissions, the processor being specifically configured to:

CO on carrier or BWP is below the set CO threshold;

CBR on carrier or BWP is below the set CBR threshold;

In a ninth aspect, embodiments of the present application provide a network device, including: a memory, a transceiver, and a processor;

the memory is used for storing computer instructions;

the transceiver is configured to, under control of the processor: controlling the transceiver to receive auxiliary information sent by the sending terminal under the condition that the network equipment and the sending terminal are in a Radio Resource Control (RRC) connection state at a Uu interface or the sending terminal is in the RRC connection state at the Uu interface and the network configures a resource allocation mode of the sending terminal using network scheduling; the sending terminal is any direct communication sending terminal positioned in the service range of the network equipment; the auxiliary information is auxiliary information sent to the sending terminal by a direct communication receiving terminal corresponding to the sending terminal; and transmitting the Packet Data Convergence Protocol (PDCP) repeated transmission control information of the direct communication interface to the transmitting terminal based on the auxiliary information.

In a tenth aspect, embodiments of the present application provide a computer readable storage medium storing computer instructions which, when executed by a processor, implement the method of any one of the first, second, or third aspects.

According to the control method for repeated transmission of the direct communication interface, after the sending terminal receives the auxiliary information sent by the receiving terminal, the repeated transmission of the direct communication interface PDCP can be controlled based on the auxiliary information. In the above process, the sending terminal controls the PDCP repeat transmission of the direct communication interface based on the auxiliary information sent by the receiving terminal, and when controlling the PDCP repeat transmission of the direct communication interface, the sending terminal and the receiving terminal can meet the actual requirements, and frequent configuration or activation of PDCP repeat transmission is avoided, so that the management of PDCP repeat transmission of the direct communication interface can be enhanced, the waste of direct communication interface resources is reduced, and the direct communication interface resources are saved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort to those of ordinary skill in the art.

Fig. 1 is an application scenario diagram of a direct communication interface repeated transmission control method provided in an embodiment of the present application;

fig. 2 is an interaction flow chart of a direct communication interface repeated transmission control method provided in an embodiment of the present application;

fig. 3 is an interaction flow chart of another method for controlling repeated transmission of a direct communication interface according to an embodiment of the present application;

fig. 4 is a flowchart of a method for controlling repeated transmission of a direct communication interface according to an embodiment of the present application;

fig. 5 is a flowchart of a method for controlling repeated transmission of a direct communication interface according to an embodiment of the present application;

fig. 6 is a flowchart of a method for controlling repeated transmission of a direct communication interface according to an embodiment of the present application;

fig. 7 is a block diagram of a sending terminal according to an embodiment of the present application;

fig. 8 is a block diagram of a receiving terminal according to an embodiment of the present application;

fig. 9 is a block diagram of another receiving terminal according to an embodiment of the present application;

fig. 10 is a block diagram of another receiving terminal according to an embodiment of the present application;

fig. 11 is a block diagram of a network device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a sending terminal according to an embodiment of the present application;

Fig. 13 is a schematic structural diagram of a receiving terminal according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

The following detailed description of specific embodiments of the present application refers to the accompanying drawings. It should be understood that the detailed description is presented herein for purposes of illustration and explanation only and is not intended to limit the present application.

It should be noted that, in the embodiments of the present application, "first" and "second" are used to distinguish similar objects, and are not used to describe a specific order or precedence. In the embodiment of the application, "and/or" describing the association relationship of the association object, three relationships may exist, for example, a and/or B may represent: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

The network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems.

In order to improve the reliability of unicast transmission of the 5G direct communication interface, the PDCP repeat transmission control method may be introduced into the 5G direct communication interface with reference to the PDCP repeat control method of the LTE direct communication interface. Currently, whether to configure or activate PDCP retransmission is determined according to QoS parameters of a direct communication interface radio bearer, which may result in unnecessary configuration or activation of PDCP retransmission of the direct communication interface, and reduce the utilization rate of direct communication interface resources.

Based on this, the embodiment of the application provides a direct communication interface repeated transmission control method, a terminal and network equipment. After receiving the auxiliary information sent by the receiving terminal, the sending terminal can control the PDCP repeated transmission based on the auxiliary information.

Fig. 1 is an application scenario diagram of a direct communication interface repeated transmission control method applicable to the embodiment of the present application. In the application scenario, the communication system at least comprises a transmitting terminal 101, a receiving terminal 102 and a network device 103; wherein communication between the transmitting terminal 101 and the receiving terminal 102 is performed through a direct communication interface, and unicast communication between the transmitting terminal 101 and the receiving terminal 102 is performed through a direct communication interface. The transmission of uplink and downlink data or control information is performed between the transmitting terminal 101 and the network device 103 through the Uu interface, and the transmission of uplink and downlink data or control information is also performed between the receiving terminal 102 and the network device 103 through the Uu interface. The Uu interface is a wireless communication interface between the terminal and the network equipment.

In one embodiment, after generating the auxiliary information for the direct communication interface, the receiving terminal 102 may send the auxiliary information to the sending terminal 101, if the sending terminal 101 is in a radio resource control (Radio Resource Control, RRC) connection state at the Uu interface or the sending terminal 101 is in an RRC connection state at the Uu interface and the network configures the sending terminal 101 to use a resource allocation mode of network scheduling, after receiving the auxiliary information sent by the receiving terminal 102, the sending terminal 101 may send the auxiliary information to the network device 103, so that the network device 103 sends the direct communication interface PDCP retransmission control information to the sending terminal 101 based on the auxiliary information, and after receiving the direct communication interface PDCP retransmission control information, the sending terminal 101 may control the direct communication interface PDCP retransmission according to the direct communication interface PDCP retransmission control information.

In another embodiment, if the sending terminal is in an offline state or the sending terminal is in an RRC idle state or an RRC inactive state at the Uu interface, after receiving the auxiliary information sent by the receiving terminal 102, the sending terminal 101 may generate direct communication interface PDCP retransmission control information according to the auxiliary information, and control the direct communication interface PDCP retransmission according to the direct communication interface PDCP retransmission control information.

The following describes the method for controlling repeated transmission of the direct communication interface provided in the embodiment of the present application in detail through two specific embodiments.

Fig. 2 shows an interactive flow chart of a direct communication interface repeated transmission control method. The method is suitable for a scene that the sending terminal is in an RRC connection state at a Uu interface, or that the sending terminal is in the RRC connection state at the Uu interface and the network configures a resource allocation mode of the sending terminal using network scheduling. The receiving terminal and the sending terminal perform unicast communication through a direct communication interface. As shown in fig. 2, the method comprises the steps of:

in step S201, the receiving terminal generates auxiliary information.

Specifically, the receiving terminal may generate the direct communication interface auxiliary information based on its implementation, for example, the receiving terminal may generate the direct communication interface auxiliary information based on a reception condition of each direct communication interface radio bearer in the direct communication interface, a channel quality condition of each carrier or a partial Bandwidth (BWP) in the direct communication interface, and the like.

Wherein the auxiliary information may include one or more of the following information:

identification information of a direct communication interface radio bearer (Side Link Radio Bearer, SLRB) for which PDCP repeat transmission is desired to be configured or activated;

identification information of a carrier and/or BWP of a direct communication interface for which PDCP retransmission is desired to be configured or activated;

For example, in one embodiment, when the receiving terminal detects that the first condition is satisfied, an indication of a desire to configure or activate PDCP repeat transmission may be generated. Wherein the first condition may be at least one of the following conditions: the channel quality of the receiving terminal on at least one carrier wave or BWP used by the direct communication interface is lower than a set quality threshold; the channel occupancy (Channel Occupancy, CO) of the receiving terminal on at least one carrier or BWP used by the direct communication interface is higher than a set CO threshold; the channel busy hour ratio (Channel Busy Rate, CBR) of the receiving terminal on at least one carrier or BWP used by the direct communication interface is higher than a set CBR threshold; a listen before talk (listen before talk, LBT) failure (failure) occurs at least one carrier or BWP used by the receiving terminal at the direct communication interface; the number of times that at least one hybrid automatic repeat request (Hybrid Automatic Repeatre Quest, HARQ) process of the receiving terminal direct communication interface occurs successive HARQ non-acknowledgement (Negative Acknowledgement, NACK) messages is above a first threshold; the number of radio link control (Radio Link Control, RLC) service data units (service Data Unit, SDU) fed back as NACK by consecutive automatic repeat request (Automatic Repeatre Quest, ARQ) corresponding to at least one SLRB of the direct communication interface of the receiving terminal is higher than a second threshold, where the first threshold may be N, the second threshold may be M, and N and M are positive integers greater than zero.

In another embodiment, when the receiving terminal monitors that the second condition is met, an indication that it is desirable to reconfigure or deactivate PDCP repeat transmission may be generated. Wherein the second condition may be at least one of the following conditions: the channel quality of the receiving terminal on each carrier wave or BWP used by the direct communication interface is higher than or equal to a set quality threshold; the CO of the receiving terminal on each carrier wave or BWP used by the direct communication interface is lower than a set CO threshold; the CBR of the receiving terminal on each carrier wave or BWP used by the direct communication interface is lower than a set CBR threshold; the number of times that at least one HARQ process of the direct communication interface of the receiving terminal generates continuous HARQ NACK is lower than a first threshold; the number of RLC SDUs for which consecutive ARQ feedback is NACK corresponding to at least one SLRB of the direct communication interface of the receiving terminal is lower than the second threshold.

In another embodiment, when the receiving terminal monitors the identification information of the SLRBs satisfying the third condition, the identification information of the SLRBs for which it is desired to configure or activate PDCP repeat transmission may be generated. Wherein the third condition may be at least one of the following conditions: the channel quality on at least one carrier or BWP used by SLRB is lower than a set quality threshold; the CO on at least one carrier or BWP used by SLRB is higher than a set CO threshold; CBR on at least one carrier or BWP used by the SLRB is above a set CBR threshold; LBT failure occurs for at least one carrier or BWP used by the SLRB; the number of times that at least one HARQ process corresponding to the SLRB generates continuous HARQ NACK is higher than a first threshold; the number of RLC SDUs for which ARQ feedback is NACK corresponding to the SLRB is higher than a second threshold.

In another embodiment, when the receiving terminal monitors the identification information of the SLRBs satisfying the fourth condition, the identification information of the SLRBs desiring to reconfigure or deactivate PDCP repeat transmission may be generated. Wherein the fourth condition may be at least one of the following conditions: the channel quality on each carrier wave or BWP used by SLRB is higher than or equal to the set quality threshold; the CO on each carrier wave or BWP used by SLRB is lower than a set CO threshold; CBR on each carrier or BWP used by the SLRB is below a set CBR threshold; the number of times that at least one HARQ process corresponding to the SLRB generates continuous HARQ NACK is lower than a first threshold; the number of RLC SDUs for which consecutive ARQ feedback for SLRBs is NACK is lower than a second threshold.

In another embodiment, when the receiving terminal monitors the identification information of the carrier and/or BWP of the direct communication interface satisfying the fifth condition, the identification information of the carrier and/or BWP of the direct communication interface for which PDCP retransmission is desired to be configured or activated may be generated. Wherein the fifth condition may be at least one of the following conditions: the channel quality on the carrier or BWP is below a set quality threshold; CO on carrier or BWP is above the set CO threshold; CBR on carrier or BWP is above the set CBR threshold; LBT failure occurs on carrier or BWP; the number of consecutive HARQ NACKs occurring for at least one HARQ process corresponding to the SLRB transmitted over a carrier or BWP is higher than a first threshold; the number of RLC SDUs fed back as NACKs by consecutive ARQ corresponding to SLRBs transmitted over a carrier or BWP is higher than a second threshold.

In another embodiment, when the receiving terminal monitors the identification information of the carrier and/or BWP of the direct communication interface satisfying the sixth condition, the identification information of the carrier and/or BWP of the direct communication interface for which the PDCP repeat transmission is desired to be de-configured or de-activated may be generated, wherein the sixth condition may be at least one of the following conditions: the channel quality on the carrier or BWP is higher than or equal to the set quality threshold; CO on carrier or BWP is below the set CO threshold; CBR on carrier or BWP is below the set CBR threshold; the number of times that at least one HARQ process corresponding to the SLRB transmitted through the carrier or BWP generates continuous HARQ NACK is lower than or equal to a first threshold; the number of RLC SDUs fed back as NACKs by consecutive ARQ corresponding to SLRBs transmitted over a carrier or BWP is below a second threshold.

In the embodiment of the application, the auxiliary information may be carried by a PC5-RRC message of the direct communication interface, for example: terminal through link assistance information (UE Assistance Information Sidelink), or other newly introduced PC5-RRC message; may also be carried by a direct communication interface media access layer control unit (Medium Access Control Control Element, MAC CE). When using a MAC CE bearer, a new Logical Channel ID (LCID) may be defined for the MAC CE.

In an alternative embodiment, the receiving terminal may further send the first indication information to the sending terminal and/or receive the second indication information sent by the sending terminal before generating the auxiliary information; the first indication information is used for indicating the receiving terminal to support PDCP repeated transmission control, or the first indication information is used for indicating protocol version information supported by the receiving terminal; the second indication information is used for indicating that the transmitting terminal supports PDCP repeat transmission control, or the second indication information is used for indicating protocol version information supported by the transmitting terminal.

Step S202, a receiving terminal sends auxiliary information to a sending terminal;

step S203, the sending terminal sends auxiliary information to the network equipment;

when the transmitting terminal is in the RRC connection state of the Uu interface or the transmitting terminal is in the RRC connection state of the Uu interface and the network configures the transmitting terminal to use the resource allocation mode of the network scheduling, after receiving the auxiliary information sent by the receiving terminal, the transmitting terminal may send the auxiliary information to the network device that provides services for the transmitting terminal.

Step S204, the network equipment generates PDCP repeated transmission control information based on the auxiliary information;

specifically, after receiving the auxiliary information sent by the sending terminal, the network device may perform PDCP repeat transmission control decision on the basis of the auxiliary information, and generate corresponding PDCP repeat transmission control information according to the decision result.

For example, in one embodiment, assuming that the auxiliary information indicates the identification information of the SLRB for which the PDCP retransmission is desired to be configured or activated, after receiving the auxiliary information sent by the sending terminal, the network device may determine to configure or activate PDCP retransmission for the SLRB at the direct communication interface according to the auxiliary information, and generate corresponding PDCP retransmission control information.

In another embodiment, assuming that the auxiliary information indicates identification information of a carrier and/or BWP of a direct communication interface where PDCP retransmission is desired to be configured or activated, after receiving the auxiliary information sent by the sending terminal, the network device may determine an SLRB carried on the carrier and/or BWP of the direct communication interface according to the auxiliary information, determine to configure or activate PDCP retransmission for the SLRB on the direct communication interface, and generate corresponding PDCP retransmission control information.

In an alternative embodiment, the network device may configure the direct communication interface PDCP repeat transmission based on a set granularity, where the set granularity includes any one of: a direct communication interface Layer 2 (Layer 2, L2) destination address; a combination of a direct communication interface L2 source address and a direct communication interface L2 destination address; a combination of a direct communication interface L2 destination address and a direct communication radio bearer SLRB; a combination of a direct communication interface L2 source address, a direct communication interface L2 destination address, and a SLRB.

Specifically, in one embodiment, if the granularity is set to be the target address of the direct communication interface L2, at least one of the following information may be included in the PDCP retransmission control information: the PDCP corresponding to the target address of the direct communication interface L2 repeatedly transmits the configuration or activated indication information; the PDCP corresponding to the target address of the direct communication interface L2 repeatedly transmits the indication information of configuration removal or deactivation; identification information of carriers and/or BWP corresponding to each path configured for PDCP repeat transmission for the direct communication interface L2 target address.

In another embodiment, if the granularity is set to be a combination of the source address of the direct communication interface L2 and the destination address of the direct communication interface L2, at least one of the following information may be included in the PDCP retransmission control information: the direct communication interface L2 source address and the direct communication interface L2 target address are combined to correspond to PDCP repeated transmission to carry out configuration or activation indication information; the direct communication interface L2 source address and the direct communication interface L2 target address are combined and correspond to PDCP repeated transmission to carry out de-configuration or de-activation indication information; identification information of carriers and/or BWP corresponding to each path for PDCP repeat transmission configured for the direct communication interface L2 source address and the direct communication interface L2 destination address combination.

In another embodiment, if the granularity is set to be the combination of the direct communication interface L2 target address and the direct communication radio bearer SLRB, at least one of the following information may be included in the PDCP retransmission control information: indication information for configuring or activating PDCP repeated transmission corresponding to the direct communication interface L2 target address and the appointed SLRB combination; indication information for performing configuration or deactivation by PDCP repeated transmission corresponding to the direct communication interface L2 target address and the appointed SLRB combination; identification information of carriers and/or BWP corresponding to each path configured for PDCP repeat transmission for the direct communication interface L2 target address and the designated SLRB combination.

In another embodiment, if the granularity is set to be a combination of the source address of the direct communication interface L2, the destination address of the direct communication interface L2, and the SLRB, at least one of the following information may be included in the PDCP retransmission control information: indication information for configuring or activating PDCP repeated transmission corresponding to the direct communication interface L2 source address, the direct communication interface L2 target address and the appointed SLRB combination; indication information for performing configuration or deactivation by PDCP repeated transmission corresponding to a direct communication interface L2 source address, a direct communication interface L2 target address and a designated SLRB combination; identification information of carriers and/or BWP corresponding to each path for PDCP repeat transmission configured for the direct communication interface L2 source address, the direct communication interface L2 destination address, and the designated SLRB.

Step S205, the network equipment sends PDCP repeated transmission control information to the sending terminal;

step S206, the sending terminal controls the PDCP repeated transmission of the direct communication interface according to the PDCP repeated transmission control information;

after receiving the PDCP repeat transmission control information sent by the network device, the sending terminal may control PDCP repeat transmission of the direct communication interface according to the PDCP repeat transmission control information.

For example, assuming that the PDCP retransmission control information is indication information for configuring or activating PDCP retransmission corresponding to the target address of the direct communication interface L2 and the specified SLRB combination, the transmitting terminal may configure or activate PDCP retransmission for the SLRB according to the indication of the PDCP retransmission control information after receiving the PDCP retransmission control information.

Step S207, the transmitting terminal transmits PDCP repeated transmission control information to the receiving terminal.

This step is an optional step.

In an alternative embodiment, when the transmitting terminal transmits PDCP repeat transmission control information to the receiving terminal, the transmitting terminal may carry PDCP repeat transmission control information with a direct communication interface related message, where the direct communication interface related message includes at least one of a PC5-RRC message of the direct communication interface and a MAC CE of the direct communication interface.

Specifically, in one embodiment, when the PDCP retransmission control information is an indication information for configuring or de-configuring PDCP retransmission, a PC5-RRC message of a direct communication interface may be used for carrying. The PC5-RRC message may include SLRB information to be configured or deconfigured for PDCP retransmission, and optionally, for the PDCP retransmission configuration message, the PC5-RRC message may further include carrier set (carrier set) configuration information corresponding to each retransmission path (path).

In another embodiment, when the PDCP retransmission control information is information that activates or deactivates PDCP retransmission, a MAC CE of the direct communication interface may be used for carrying. The activation or deactivation status of each SLRB may be indicated in the MAC CE in a bitmap manner.

After receiving the PDCP retransmission control information sent by the sending terminal, the receiving terminal can determine whether to activate PDCP retransmission according to the PDCP retransmission control information, and if it is determined that PDCP retransmission is to be activated, the receiving terminal can execute PDCP retransmission related operations.

In the above process, in the process of generating PDCP retransmission control information based on the auxiliary information, the network device may configure PDCP retransmission for the direct communication interface SLRB indicated by the auxiliary information, or may configure PDCP retransmission for the SLRB corresponding to the carrier of the direct communication interface indicated by the auxiliary information and/or the identification information of the BWP, so that the sending terminal may perform PDCP retransmission control for the direct communication interface SLRB according to the PDCP retransmission control information.

Fig. 3 shows an interactive flow chart of a direct communication interface repeated transmission control method. The method can be suitable for a scene that a Uu interface between the sending terminal and the network equipment is in an RRC idle state or an RRC inactive state, or a scene that the sending terminal is in a desquamation state. As shown in fig. 3, the method comprises the steps of:

step S301, a receiving terminal generates auxiliary information;

specifically, the receiving terminal may generate the direct communication interface auxiliary information based on its implementation, for example, the receiving terminal may generate the direct communication interface auxiliary information based on a reception condition of each direct communication interface radio bearer in the direct communication interface, a channel quality condition of each carrier or BWP in the direct communication interface, and the like.

In another optional embodiment, before generating the auxiliary information, the receiving terminal may further send the first indication information to the sending terminal and/or receive the second indication information sent by the sending terminal; the first indication information is used for indicating the receiving terminal to support PDCP repeated transmission control or indicating protocol version information supported by the receiving terminal; the second indication information is used for indicating that the transmitting terminal supports PDCP repeat transmission control, or the second indication information is used for indicating protocol version information supported by the transmitting terminal.

Step S302, a receiving terminal sends auxiliary information to a sending terminal;

step S303, the sending terminal generates PDCP repeated transmission control information based on the auxiliary information;

specifically, in some embodiments, after receiving the auxiliary information sent by the receiving terminal, the sending terminal may perform PDCP repeat transmission control decision of the direct communication interface based on the auxiliary information, and generate corresponding PDCP repeat transmission control information according to the decision result.

For example, in one embodiment, assuming that the auxiliary information indicates the identification information of the SLRB for which the PDCP retransmission is desired to be configured or activated, the transmitting terminal may determine to configure or activate PDCP retransmission for the SLRB at the direct communication interface after receiving the auxiliary information transmitted by the receiving terminal, and generate corresponding PDCP retransmission control information.

In another embodiment, assuming that the identification information of the carrier and/or BWP of the direct communication interface for which the PDCP retransmission is desired to be configured or activated is indicated in the auxiliary information, the transmitting terminal may determine the SLRB carried on the carrier and/or BWP of the direct communication interface according to the auxiliary information after receiving the auxiliary information transmitted by the receiving terminal, determine to configure or activate PDCP retransmission for the SLRB on the direct communication interface, and generate corresponding PDCP retransmission control information.

In other embodiments, if the transmitting terminal is in the RRC idle state or the RRC inactive state in the Uu interface, the transmitting terminal may generate PDCP retransmission control information according to the auxiliary information and the broadcast information of the network, where the broadcast information of the network may include QoS parameters, such as a packet error rate (Packet Error Rate, PER) threshold, for PDCP retransmission.

In other embodiments, if the sending terminal is in a disconnected state, the sending terminal may generate PDCP retransmission control information according to the auxiliary information and the pre-configuration information, where the pre-configuration information may include QoS parameters that need to be retransmitted by the PDCP, for example, a PER threshold.

In an alternative embodiment, the sending terminal may configure the direct communication interface PDCP repeat transmission based on a set granularity, where the set granularity includes any one of the following: a direct communication interface L2 destination address; a combination of a direct communication interface L2 source address and a direct communication interface L2 destination address; a combination of a direct communication interface L2 destination address and a direct communication radio bearer SLRB; a combination of a direct communication interface L2 source address, a direct communication interface L2 destination address, and a SLRB.

Step S304, the sending terminal controls the PDCP repeated transmission of the direct communication interface according to the PDCP repeated transmission control information;

after the sending terminal generates the PDCP repeat transmission control information, it can control PDCP repeat transmission of the direct communication interface according to the PDCP repeat transmission control information.

In step S305, the transmitting terminal transmits PDCP repeat transmission control information to the receiving terminal.

This step is an optional step.

Specifically, in one embodiment, when the PDCP retransmission control information is an indication information for configuring or de-configuring PDCP retransmission, a PC5-RRC message of a direct communication interface may be used for carrying. The PC5-RRC message may include SLRB information to be configured or deconfigured for PDCP retransmission, and optionally, for the PDCP retransmission configuration message, the PC5-RRC message may further include carrier set configuration information corresponding to each retransmission path.

In another embodiment, when the PDCP retransmission control information is information that activates or deactivates PDCP retransmission, a MAC CE of the direct communication interface may be used for carrying. The activation or deactivation status of each SLRB may be indicated in the MAC CE by means of bitmap.

After receiving the PDCP retransmission control information sent by the sending terminal, the receiving terminal can determine whether to configure or activate PDCP retransmission according to the PDCP retransmission control information, and if it is determined that PDCP retransmission is to be configured or activated, PDCP retransmission related operations can be executed.

In the above process, in the process of generating PDCP retransmission control information based on the auxiliary information, the sending terminal may configure PDCP retransmission for the direct communication interface SLRB indicated by the auxiliary information, or may configure PDCP retransmission for the SLRB corresponding to the carrier of the direct communication interface indicated by the auxiliary information and/or the identification information of the BWP, and perform PDCP retransmission control configuration or activation for the direct communication interface SLRB according to the PDCP retransmission control information.

Based on the same inventive concept, in the embodiments provided in the present application, a flowchart of a direct communication interface repeated transmission control method is provided. The method is performed by a transmitting terminal, as shown in fig. 4, and comprises the steps of:

Step S401, receiving auxiliary information sent by a receiving terminal;

the receiving terminal is a terminal which performs unicast communication with the sending terminal through a direct communication interface;

step S402, controlling the direct communication interface packet data convergence protocol PDCP repeat transmission based on the auxiliary information.

Based on the same inventive concept, in the embodiments provided in the present application, a flowchart of a direct communication interface repeated transmission control method is provided. The method is performed by a receiving terminal, as shown in fig. 5, and comprises the steps of:

step S501, generating auxiliary information for the direct communication interface;

the auxiliary information is used for assisting a sending terminal or network equipment for providing service for the sending terminal to control the repeated transmission of the direct communication interface packet data convergence protocol PDCP; the sending terminal is a terminal which performs unicast communication with the receiving terminal through the direct communication interface;

step S502, the auxiliary information is sent to a sending terminal.

Based on the same inventive concept, in the embodiments provided in the present application, a flowchart of a direct communication interface repeated transmission control method is provided. The method is performed by a network device, as shown in fig. 6, and comprises the steps of:

Step S601, receiving auxiliary information sent by a sending terminal under the condition that the network equipment and the sending terminal are in a Radio Resource Control (RRC) connection state at a Uu interface or the sending terminal is in the RRC connection state at the Uu interface and the network configures a resource allocation mode that the sending terminal uses network scheduling;

the sending terminal is any direct communication sending terminal positioned in the service range of the network equipment; the auxiliary information is auxiliary information sent to the sending terminal by a direct communication receiving terminal corresponding to the sending terminal;

step S602, based on the auxiliary information, transmitting the direct communication interface packet data convergence protocol PDCP repeat transmission control information to the transmitting terminal.

Based on the same inventive concept, in the embodiments provided herein, there is provided a transmitting terminal, as shown in fig. 7, including a first receiving unit 701 and a control unit 702; wherein:

a first receiving unit 701, configured to receive auxiliary information sent by a receiving terminal; the receiving terminal is a terminal which performs unicast communication with the sending terminal through a direct communication interface;

a control unit 702, configured to control the direct communication interface packet data convergence protocol PDCP repeat transmission based on the auxiliary information.

In an alternative embodiment, the control unit 702 is specifically configured to:

A direct communication interface L2 destination address;

In an alternative embodiment, the control unit 702 may be further configured to:

Based on the same inventive concept, in the embodiments provided herein, there is provided a receiving terminal, as shown in fig. 8, including a generating unit 801 and a first transmitting unit 802; wherein:

A generating unit 801 for generating auxiliary information for a direct communication interface; the auxiliary information is used for assisting a sending terminal or network equipment for providing service for the sending terminal to control the repeated transmission of the direct communication interface packet data convergence protocol PDCP; the sending terminal is a terminal which performs unicast communication with the receiving terminal through the direct communication interface;

a first sending unit 802, configured to send the auxiliary information to the sending terminal.

In an alternative embodiment, if the auxiliary information includes indication information that PDCP retransmission is desired to be configured or activated, the generating unit 801 is specifically configured to:

In an alternative embodiment, if the auxiliary information includes indication information that the PDCP repeat transmission is desired to be reconfigured or deactivated, the generating unit 801 is specifically configured to:

In an alternative embodiment, if the auxiliary information includes identification information of an SLRB for which PDCP retransmission is desired to be configured or activated, the generating unit 801 is specifically configured to:

LBT failure occurs for at least one carrier or BWP used by the SLRB;

In an alternative embodiment, if the auxiliary information includes identification information of SLRB for which the PDCP repeat transmission is desired to be de-configured or de-activated, the generating unit 801 is specifically configured to:

CBR on each carrier or BWP used by the SLRB is below a set CBR threshold;

In an alternative embodiment, if the auxiliary information includes identification information of a carrier and/or BWP of a direct communication interface where PDCP retransmission is desired to be configured or activated, the generating unit 801 is specifically configured to:

the channel quality on the carrier or BWP is below a set quality threshold;

CO on carrier or BWP is above the set CO threshold;

CBR on carrier or BWP is above the set CBR threshold;

LBT failure occurs on carrier or BWP;

In an alternative embodiment, the auxiliary information includes identification information of a carrier and/or BWP of the direct communication interface for which the PDCP repeat transmission is desired to be de-configured or de-activated, and the generating unit 801 is specifically configured to:

CO on carrier or BWP is below the set CO threshold;

CBR on carrier or BWP is below the set CBR threshold;

In an alternative embodiment, before the generating unit, an interaction unit 901 is further included, as shown in fig. 9, where the interaction unit 901 is specifically configured to:

In an alternative embodiment, after the first sending unit 802, a processing unit 1001 is further included, as shown in fig. 10, where the processing unit 1001 is specifically configured to:

Based on the same inventive concept, in the embodiments provided herein, there is provided a network device, as shown in fig. 11, including a second receiving unit 1101 and a second transmitting unit 1102; wherein:

a second receiving unit 1101, configured to receive auxiliary information sent by a sending terminal when the network device and the sending terminal are in a radio resource control RRC connected state at a Uu interface or the sending terminal is in an RRC connected state at the Uu interface and the network configures a resource allocation mode in which the sending terminal uses network scheduling; the sending terminal is any direct communication sending terminal positioned in the service range of the network equipment; the auxiliary information is auxiliary information sent to the sending terminal by a direct communication receiving terminal corresponding to the sending terminal;

A second sending unit 1102, configured to send, to the sending terminal, direct communication interface packet data convergence protocol PDCP repeat transmission control information based on the auxiliary information.

Based on the same technical conception, the embodiment of the application also provides a sending terminal. The transmitting terminal can execute any of the direct communication interface repeated transmission control methods implemented in the above embodiments.

Fig. 12 shows a schematic structural diagram of the transmitting terminal provided in the embodiment of the present application, that is, another schematic structural diagram of the transmitting terminal is shown. As shown in fig. 12, the transmitting terminal includes a processor 1201, a memory 1202, and a transceiver 1203.

The processor 1201 is responsible for managing the bus architecture and general processing, and the memory 1202 may store data used by the processor 1201 in performing operations. The transceiver 1203 is configured to receive and transmit data under control of the processor 1201.

A bus architecture may be comprised of any number of interconnected buses and bridges, and in particular one or more processors represented by the processor 1201 and various circuits of memory represented by the memory 1202. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The processor 1201 is responsible for managing the bus architecture and general processing, and the memory 1202 may store data used by the processor 1201 in performing operations.

The flow disclosed in the embodiments of the present application may be applied to the processor 1201 or implemented by the processor 1201. In implementation, the steps of the signal processing flow may be performed by integrated logic circuits of hardware in the processor 1201 or by instructions in the form of software. The processor 1201 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 device, discrete hardware components, and may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. The 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 application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 1202, and the processor 1201 reads the information in the memory 1202 and completes the steps of the signal processing flow in combination with its hardware.

Specifically, the processor 1201 is configured to read computer instructions in the memory 1202, and when the processor 1201 executes the computer instructions, the computer instructions are implemented:

In an alternative embodiment, the processor 1201 is specifically configured to:

a direct communication interface L2 destination address;

In an alternative embodiment, the processor 1201 is further configured to:

Based on the same technical conception, the embodiment of the application also provides a receiving terminal. The receiving terminal can execute any of the direct communication interface repeated transmission control methods implemented in the above embodiments.

Fig. 13 shows a schematic structural diagram of the receiving terminal provided in the embodiment of the present application, that is, another schematic structural diagram of the receiving terminal is shown. As shown in fig. 13, the terminal includes a processor 1301, a memory 1302, and a transceiver 1303.

The processor 1301 is responsible for managing the bus architecture and general processing, and the memory 1302 may store data used by the processor 1301 in performing operations. The transceiver 1303 is used to receive and transmit data under the control of the processor 1301.

A bus architecture may comprise any number of interconnecting buses and bridges, and in particular one or more processors represented by the processor 1301 and various circuits of memory represented by the memory 1302. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The processor 1301 is responsible for managing the bus architecture and general processing, and the memory 1302 may store data used by the processor 1301 in performing operations.

The flow disclosed in the embodiments of the present application may be applied to the processor 1301 or implemented by the processor 1301. In implementation, the steps of the signal processing flow may be performed by integrated logic circuits of hardware in the processor 1301 or instructions in the form of software. Processor 1301 may be a general purpose processor, digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, which may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. The 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 application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 1302, and the processor 1301 reads the information in the memory 1302, and completes the steps of the signal processing flow in combination with its hardware.

Specifically, the processor 1301 is configured to read computer instructions in the memory 1302, where the processor 1301 executes the computer instructions to implement:

and sending the auxiliary information to the sending terminal.

In an alternative embodiment, if the auxiliary information includes indication information that PDCP repeat transmission is desired to be configured or activated, the processor 1301 is specifically configured to:

In an alternative embodiment, if the auxiliary information includes indication information that the PDCP repeat transmission is desired to be reconfigured or deactivated, the processor 1301 is specifically configured to:

In an alternative embodiment, if the auxiliary information includes identification information of an SLRB for which PDCP retransmission is desired to be configured or activated, the processor 1301 is specifically configured to:

LBT failure occurs for at least one carrier or BWP used by the SLRB;

In an alternative embodiment, if the auxiliary information includes identification information of SLRBs for which the PDCP repeat transmission is desired to be de-configured or de-activated, the processor 1301 is specifically configured to:

CBR on each carrier or BWP used by the SLRB is below a set CBR threshold;

In an alternative embodiment, if the auxiliary information includes identification information of a carrier and/or BWP of a direct communication interface where PDCP retransmission is desired to be configured or activated, the processor 1301 is specifically configured to:

the channel quality on the carrier or BWP is below a set quality threshold;

CO on carrier or BWP is above the set CO threshold;

CBR on carrier or BWP is above the set CBR threshold;

LBT failure occurs on carrier or BWP;

In an alternative embodiment, the auxiliary information includes identification information of a carrier and/or BWP of the direct communication interface for which the PDCP retransmission is desired to be de-configured or deactivated, and the processor 1301 is specifically configured to:

CO on carrier or BWP is below the set CO threshold;

CBR on carrier or BWP is below the set CBR threshold;

In an alternative embodiment, the processor 1301 is further configured to:

Based on the same technical conception, the embodiment of the application also provides network equipment. The network device is capable of executing any one of the direct communication interface repeated transmission control methods implemented in the above embodiments.

Fig. 14 shows a schematic structural diagram of the terminal provided in the embodiment of the present application, that is, another schematic structural diagram of the terminal is shown. As shown in fig. 14, the terminal includes a processor 1401, a memory 1402, and a transceiver 1403.

The processor 1401 is responsible for managing the bus architecture and general processing, and the memory 1402 may store data used by the processor 1401 in performing operations. The transceiver 1403 is used to receive and transmit data under the control of the processor 1401.

The bus architecture may include any number of interconnecting buses and bridges, and in particular, one or more processors represented by the processor 1401 and various circuits of the memory, represented by the memory 1402. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The processor 1401 is responsible for managing the bus architecture and general processing, and the memory 1402 may store data used by the processor 1401 in performing operations.

The flow disclosed in the embodiments of the present application may be applied to the processor 1401 or implemented by the processor 1401. In implementation, the steps of the signal processing flow may be performed by integrated logic circuits of hardware in the processor 1401 or instructions in the form of software. The processor 1401 may be a general purpose processor, digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, and may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. The 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 application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in memory 1402 and processor 1401 reads the information in memory 1402 and performs the steps of the signal processing flow in combination with its hardware.

Specifically, the processor 1401 is configured to read computer instructions in the memory 1402, and when the processor 1401 executes the computer instructions, the processor 1401 realizes:

in an alternative embodiment, based on the assistance information, a direct communication interface packet data convergence protocol PDCP repeat transmission control information is sent to the sending terminal.

The auxiliary information includes one or more of the following information:

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, 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, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A method for controlling repeated transmission of a direct communication interface, which is applied to a transmitting terminal, the method comprising:

2. The method of claim 1, wherein the auxiliary information comprises one or more of the following:

3. The method of claim 1, wherein controlling the direct communication interface packet data convergence protocol PDCP repeat transmission based on the assistance information comprises:

4. The method according to claim 1, wherein said controlling the direct communication interface packet data convergence protocol PDCP repeat transmission based on the assistance information comprises:

5. The method according to claim 1, wherein said controlling the direct communication interface packet data convergence protocol PDCP repeat transmission based on the assistance information comprises:

6. The method according to any of claims 3-5, characterized in that the direct communication interface PDCP repeat transmission is controlled based on a set granularity; the set granularity comprises any one of the following:

a direct communication interface L2 destination address;

7. The method of claim 6, wherein if the set granularity is a direct communication interface L2 target address, the PDCP repeat transmission control information comprises at least one of:

8. The method of claim 6, wherein if the set granularity is a combination of a direct communication interface L2 source address and a direct communication interface L2 destination address, the PDCP repeat transmission control information comprises at least one of:

9. The method of claim 6, wherein if the set granularity is a combination of a direct communication interface L2 target address and a direct communication radio bearer SLRB, the PDCP repeat transmission control information comprises at least one of:

10. The method of claim 6, wherein if the set granularity is a combination of a direct communication interface L2 source address, a direct communication interface L2 destination address, and a SLRB, the PDCP retransmission control information includes at least one of:

11. The method according to any one of claims 3 to 5, wherein after the generating PDCP repeat transmission control information, the method further comprises:

12. The method of claim 11, wherein the direct communication interface related message comprises at least one of:

13. A direct communication interface repeated transmission control method, which is applied to a receiving terminal, the method comprising:

and sending the auxiliary information to the sending terminal.

14. The method of claim 13, wherein the auxiliary information comprises one or more of the following:

15. The method of claim 14, wherein generating the assistance information for the direct communication interface if the assistance information includes indication that PDCP repeat transmission is desired to be configured or activated comprises:

16. The method of claim 14, wherein generating the assistance information for the direct communication interface if the assistance information includes indication that a PDCP repeat transmission is desired to be de-configured or de-activated comprises:

17. The method of claim 14, wherein generating the assistance information for the direct communication interface if the assistance information includes identification information of the SLRB for which PDCP repeat transmission is desired to be configured or activated comprises:

LBT failure occurs for at least one carrier or BWP used by the SLRB;

18. The method of claim 14, wherein generating the assistance information for the direct communication interface if the assistance information includes identification information of SLRBs for which PDCP repeat transmission is desired to be de-configured or de-activated comprises:

CBR on each carrier or BWP used by the SLRB is below a set CBR threshold;

19. The method according to claim 14, wherein generating the assistance information for the direct communication interface if the assistance information includes identification information of a carrier and/or BWP of the direct communication interface for which PDCP repeat transmission is desired to be configured or activated, comprises:

the channel quality on the carrier or BWP is below a set quality threshold;

CO on carrier or BWP is above the set CO threshold;

CBR on carrier or BWP is above the set CBR threshold;

LBT failure occurs on carrier or BWP;

20. The method according to claim 14, wherein the assistance information comprises identification information of a carrier and/or BWP of a direct communication interface for which a PDCP repeat transmission is desired to be de-configured or de-activated, the generating assistance information for the direct communication interface comprising:

CO on carrier or BWP is below the set CO threshold;

CBR on carrier or BWP is below the set CBR threshold;

21. The method according to any of claims 13-20, characterized in that the assistance information is carried by a radio resource control, PC5-RRC, message of the direct communication interface or by a direct communication interface media access layer control unit, MAC CE.

22. The method according to any one of claims 13-20, wherein before generating the assistance information for the direct communication interface, the method further comprises:

23. The method according to any one of claims 13 to 20, wherein after the sending of the assistance information to the sending terminal, the method further comprises:

24. A method for controlling repeated transmission of a direct communication interface, which is applied to a network device, the method comprising:

25. The method of claim 24, wherein the auxiliary information comprises one or more of the following:

26. A transmitting terminal, characterized in that the transmitting terminal comprises:

27. A receiving terminal, the receiving terminal comprising:

28. A network device, the network device comprising:

29. A transmitting terminal, characterized in that the transmitting terminal comprises: a memory, a transceiver, and a processor;

the memory is used for storing computer instructions;

30. The transmitting terminal according to claim 29, wherein the processor is specifically configured to:

31. The transmitting terminal according to claim 29, wherein the processor is specifically configured to:

32. The transmitting terminal according to claim 29, wherein the processor is specifically configured to:

33. The transmitting terminal according to any of claims 30-32, characterized in that the direct communication interface PDCP repeat transmission is controlled based on a set granularity; the set granularity comprises any one of the following:

A direct communication interface L2 destination address;

34. The transmitting terminal of claim 33, wherein if the set granularity is a direct communication interface L2 target address, the PDCP repeat transmission control information comprises at least one of:

35. The transmitting terminal of claim 33, wherein if the set granularity is a combination of a direct communication interface L2 source address and a direct communication interface L2 destination address, the PDCP repeat transmission control information comprises at least one of:

36. The transmitting terminal of claim 33, wherein if the set granularity is a combination of a direct communication interface L2 target address and a direct communication radio bearer SLRB, the PDCP repeat transmission control information includes at least one of:

37. The transmitting terminal of claim 33, wherein if the set granularity is a combination of a direct communication interface L2 source address, a direct communication interface L2 destination address, and a SLRB, the PDCP repeat transmission control information includes at least one of:

38. A receiving terminal, the receiving terminal comprising: a memory, a transceiver, and a processor;

the memory is used for storing computer instructions;

39. The receiving terminal of claim 38, wherein the assistance information comprises one or more of the following:

40. The receiving terminal of claim 39, wherein if the assistance information includes indication information that PDCP repeat transmission is desired to be configured or activated, the processor is configured to:

41. The receiving terminal of claim 39, wherein if the assistance information includes indication that PDCP repeat transmission is desired to be de-configured or de-activated, the processor is configured to:

42. The receiving terminal of claim 39, wherein if the assistance information includes identification information of SLRBs for which PDCP repeat transmission is desired to be configured or activated, the processor is specifically configured to:

LBT failure occurs for at least one carrier or BWP used by the SLRB;

43. The receiving terminal of claim 39, wherein if the assistance information includes identification information of SLRBs for which PDCP repeat transmission is desired to be de-configured or de-activated, the processor is configured to:

CBR on each carrier or BWP used by the SLRB is below a set CBR threshold;

44. The receiving terminal of claim 39, wherein if the assistance information includes identification information of a carrier and/or BWP of a direct communication interface for which PDCP repeat transmission is desired to be configured or activated, the processor is specifically configured to:

the channel quality on the carrier or BWP is below a set quality threshold;

CO on carrier or BWP is above the set CO threshold;

CBR on carrier or BWP is above the set CBR threshold;

LBT failure occurs on carrier or BWP;

45. The receiving terminal according to claim 39, wherein the assistance information comprises identification information of a carrier and/or BWP of a direct communication interface for which a PDCP repeat transmission is desired to be de-configured or de-activated, the processor being specifically configured to:

CO on carrier or BWP is below the set CO threshold;

CBR on carrier or BWP is below the set CBR threshold;

46. A network device, the network device comprising: a memory, a transceiver, and a processor;

the memory is used for storing computer instructions;

47. A computer readable storage medium storing computer instructions which when executed by a processor perform the method of any one of claims 1 to 12, or the method of any one of claims 13 to 23, or the method of any one of claims 24 to 25.