高铁接触网无线传感网络混合MAC通信策略研究

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中图分类号：TN925-34；TP212.9；U225 文献标识码：A 文章编号：1004-373X（2025）15-0091-07

Hybrid MAC based communication strategy for high-speed rail catenary wirelesssensornetwork

TANPing'，YANGDarui’，ZHUDongsheng²，XUZhen1，WUYongbo'，DINGJin1 （1.SchoolofutomationandElectricalEngneering，ZhejiangUnversityofSienceandTechnology，Hangzou3o，ina; 2.Gosuncn Chuanglian Technology Co.，Ltd.， Hangzhou 31oo12， China）

Abstract：Thecatenarysystemisacrucial subsystem in high-speedrailways，andreal-timeonline monitoringof its operational statusbythewirelessensornetwork （WSN）ofthehigh-spedrailcatenaryisofgreatsignificance.Tofurthereduce chanelconflictsamong nodesinthewirelessmonitoring networkandenhancekeydatatransmissionsuccessrate，throughput，nd overallnetworkperformanceindynamicenvironments，alow-powerhybridMAC（LH-MAC）communicationstrategyisproposed. Firstly，aprioritizationschemethatintegratesstaticpriorityfactors，emergencypriorityfactors，andfailurepriorityfactorsis proposedbasedonthecharacteristicsofthemonitoringnodes.Secondly，adynamicalocation mechanismfornodereportingtime slots during thephaseofTDMAandanupdating mechanismfornode wake-uptimesarestudiedonthebasisofthepriorityof ach node.Aditionall，thebackoffparametersfornodeswithdiferentprioritylevelsareinitializedduringthephaseofCSMA/CA. Finaly，aWStestplatformwasconstructedtoevaluatecommunicationfilureate，delayandtroughput.Theexperiental resultsdemonstratethattheproposedstrategachievesservicediferentiationefectivelymprovesthequalityofservice（Qo）for criticaldatatosomeextent，andreducesnetworktransmissionfailureratesanddelays，therebyextendingthenetwork'slifecycle. To sumup，theproposed strategy provides asolid foundation forimproving the performanceof WSNinhigh-speedrailcatenary.

Keywords：high-speed rail catenary; WSN; superframe; priority; hybrid MAC; low power consumption

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