基于动态资源分配的C-V2X拥塞控制策略

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中图分类号：TN92-34 文献标识码：A 文章编号：1004-373X（2026）07-0007-05

引用格式：，，，等.基于动态资源分配的C-V2X拥塞控制策略[J].现代电子技术，2026，49（7）：7-11.

C-V2X congestion control strategy based on dynamic resource allocation

CHEN Tan，JIANG Xiaoming，CONG Yingqi，JIANG Yujie （SchoolofComputerScienceandCommunicationEngineering，Jiangsu University，Zhenjiang212O13，China）

Abstract：Celularvehicle-to-everything（C-V2X）technology，asanintegralpartofthenextgenerationintellgent transportationsystem（ITS），iscommitedtoimprovingthecommunicationeficiencyandsafetybetweenvehicles.Howeverthe existingaccessmechanismsoftraffcmesagearepronetoconflictandwillcausetransmissionfilureinthecaseoftim-varing vehicledensity.Inviewof theabove，thispaperproposesaninformationchannelresourcealocationstrategynameddynamic semi-persistentsheduling（D-SPS），whichfocusesonthemessagecongestioncontrolofheavytraffcintheexistingurbanroads. Inthisstrategy，aroad-section-basedribbonclusteringschemeisperformedandthecommunicationresourcesarealocated dynamicallyacording tothenodedensitywithintherelevantcluster，whichtoacertainextentallviates thecongestioncausedby uneven distributionof nodedensityineachlaneduringaspecifictime period.Inaddition，thelaneclusterhead electionstrategy isfurtherimprovedonthebasisof theabovestrategies，soastoreducetheelectioncostandimprovethestabilityofthecluster. Theresultsof modelingcalculationandnumericalcomparisonshow thattheproposed strategycanefectivelyreduceaccess congestionofcurrentMode2mechanism.Inaddition，thetransmissiontimeliness ofsecuritybeaconsandthepacketdelivery ratio（PDR）oftheinformationwithhighbitratehavebeenimprovedsignificantlyinthesceneofhigh-densitydatainteraction.

Keywords：InternetofVehicles;C-V2X;Mode2;congestioncontrol;clustering;clusterheadelection;safetyservice

0 引言

在当今的车联网通信系统中，蜂窝车联网（CellularVehicle-to-Everything，C-V2X）技术利用现有的蜂窝通信基础设施，实现了更广泛的覆盖范围和更远的通信距离，提高了通信的可靠性和稳定性1，因而成为当前的研究热点。（剩余7894字）