KR-20260067758-A - Method and apparatus for Adaptive DENM Retransmission based on 5G NR V2X, and a storage medium storing a computer-executable program for the Adaptive DENM Retransmission

Abstract

An embodiment of the present invention provides a 5G NR V2X-based adaptive DENM retransmission method comprising: generating a plurality of non-periodic messages according to message characteristics; calculating channel congestion for the generated plurality of non-periodic messages; determining a resource for the plurality of messages based on the channel congestion; and transmitting at least one of the plurality of messages to a receiving UE based on the resource.

Inventors

• 문철
• 유승재

Assignees

• 국립한국교통대학교산학협력단

Dates

Publication Date

20260513

Application Date

20241106

Claims (9)

1. A step of generating multiple non-periodic messages according to message characteristics; A step of calculating channel congestion for a plurality of non-periodic messages generated above; A step of determining resources for the plurality of messages based on the channel congestion; and A step of transmitting at least one of the plurality of messages to a receiving UE based on the above resources; including, 5G NR V2X-based Adaptive DENM Retransmission Method.
2. In Article 1, Prior to the above calculation step, A step of reserving resources for the plurality of non-periodic messages based on a Dynamic Scheduling (DS) method that utilizes new resources whenever a message is generated; including, 5G NR V2X-based Adaptive DENM Retransmission Method.
3. In Article 1, The above-mentioned calculation step is, A step of calculating the channel congestion of the current channel for the plurality of aperiodic messages a specific number of slots before transmitting the first aperiodic message among the plurality of aperiodic messages; including, 5G NR V2X-based Adaptive DENM Retransmission Method.
4. In Article 1, The above-mentioned determining step is, A step of reserving resources for at least one of the plurality of messages according to the channel congestion, and canceling resources for the remainder excluding at least one of the plurality of messages; including, 5G NR V2X-based Adaptive DENM Retransmission Method.
5. A database that stores data; and It includes a processor that processes the above data, The above processor is, Generate multiple non-periodic messages based on message characteristics, and Calculate channel congestion for the multiple non-periodic messages generated above, and Based on the channel congestion above, determine resources for the multiple messages, and Transmitting at least one of the plurality of messages to a receiving UE based on the above resources, 5G NR V2X-based adaptive DENM retransmission device.
6. In Article 5, The above processor is, Reserving resources for the aforementioned multiple non-periodic messages based on a Dynamic Scheduling (DS) method that utilizes new resources whenever a message is generated, 5G NR V2X-based adaptive DENM retransmission device.
7. In Article 5, The above processor is, Calculating the channel congestion of the current channel for the plurality of aperiodic messages a specific number of slots before transmitting the first aperiodic message among the plurality of aperiodic messages, 5G NR V2X-based adaptive DENM retransmission device.
8. In Article 5, The above processor is, According to the channel congestion, a resource is reserved for at least one of the plurality of messages, and a resource is canceled for the remainder excluding at least one of the plurality of messages. 5G NR V2X-based adaptive DENM retransmission device.
9. Generate multiple non-periodic messages based on message characteristics, and Calculate channel congestion for the multiple non-periodic messages generated above, and Based on the channel congestion above, determine resources for the multiple messages, and A storage medium storing a computer-executable program that performs the step of transmitting at least one of the plurality of messages to a receiving UE based on the above resources.

Description

Method and apparatus for Adaptive DENM Retransmission based on 5G NR V2X, and a storage medium storing a computer-executable program for the Adaptive DENM Retransmission The invention relates to a 5G NR V2X-based adaptive DENM retransmission method, a device, and a storage medium for storing a computer-executable program. V2X (Vehicle to Everything) communication technology is recognized as one of the key technologies for autonomous driving. The 3GPP (Generation Partnership Project) standardized 5G-based NR (New Radio) V2X technology to support such V2X technology in Rel 16. In addition, 3GPP defined the PHY (physical) layer and MAC (medium access control) layer of NR V2X. In the MAC layer, MODE 1 resource allocation method, which supports uplink and downlink communication between base stations and UEs (User Equipment) through the RAN (Radio Access Network), and MODE 2 resource allocation method, which enables direct communication between UEs through sidelinks, were defined. In this case, a problem arose in which the retransmission of non-periodic messages increased resource reselection and the number of resource conflicts with periodic messages due to the mixed transmission of periodic and non-periodic messages, thereby causing performance degradation of periodic messages. Therefore, while there is growing interest in resource conflicts caused by the indiscriminate retransmission of such aperiodic messages, practical research to reduce these resource conflicts is currently insufficient. FIG. 1 is a drawing disclosing an example of an adaptive DENM retransmission system according to an embodiment. FIG. 2 is a drawing disclosing an example of resource reselection for CAM using the SB-SPS method according to an embodiment. FIG. 3 is a drawing disclosing an example of resource reselection for DENM using the DS method according to an embodiment. FIG. 4 is a drawing disclosing an example of a performance graph of DENM and CAM based on the number of DENM retransmissions according to an embodiment. FIG. 5 is a drawing disclosing an example of a PDR performance graph of DENM and CAM based on DENM retransmission terminal density according to an embodiment. FIG. 6 is a drawing disclosing an example of a PDR performance graph of a DENM for adaptive DENM retransmission and fixed DENM retransmission according to an embodiment. FIG. 7 is a drawing disclosing an example of a PDR performance graph of a CAM for adaptive DENM retransmission and fixed DENM retransmission according to an embodiment. FIG. 8 is a flowchart disclosing an example of an adaptive DENM retransmission method according to an embodiment. FIG. 9 is a flowchart disclosing another example of an adaptive DENM retransmission method according to an embodiment. FIG. 10 is a drawing disclosing an example of an adaptive DENM retransmission device according to an embodiment. The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail. The various features of the invention disclosed in the claims may be better understood by considering the drawings and the detailed description. The apparatus, method, manufacturing method, and various embodiments disclosed in the specification are provided for illustrative purposes only. The disclosed structural and functional features are intended to enable a person skilled in the art to specifically implement the various embodiments and are not intended to limit the scope of the invention. The disclosed terms and sentences are intended to explain the various features of the invention in an easy-to-understand manner and are not intended to limit the scope of the invention. In describing the present invention, if it is determined that a detailed description of related prior art could unnecessarily obscure the essence of the present invention, such detailed description is omitted. FIG. 1 is a drawing disclosing an example of an adaptive DENM retransmission system according to an embodiment. In the illustrated example, the adaptive DENM retransmission system may include a plurality of vehicles. In one embodiment, the vehicles may include autonomous vehicles. In one embodiment, the plurality of vehicles may include a transmitting terminal (User Equipment, UE) (110) that transmits a message and a receiving terminal (UE) (120) that receives a message. In one embodiment, each transmitting UE (110) may transmit periodic or non-periodic messages to each receiving UE (120) via a sidelink. In one embodiment, when a new message is generated by the transmitting UE (110), the content of the message may be encapsulated in a Transport Block (TB) and transmitted together with dedicated Sidelink Control Information (SCI). In this case, when the transmitting UE (110) generates a periodic message, that is, traffic, CAM (Cooperative Awareness Message), it can reserve resources through the SB-SPS method, and when it generates a non-periodic