车载无线网络中基于冲突估计的多信道选择策略  

Multi-channel Choose Policy Based on Conflict Estimating in Wireless Vehicular Networks

作　　者：赵鼎新[1] 谢显中[1] 王昭然[1] 

机构地区：[1]重庆邮电大学计算机科学与技术学院,宽带接入网络研究所,重庆400065

出　　处：《吉林大学学报（理学版）》2012年第3期557-562,共6页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:60572089;60872037);重庆市自然科学基金(批准号:2008BB2411)

摘　　要：通过分析IEEE 802.11p/1609的信道切换与数据传输机制,采用Markov链和连续空闲时隙结合的方法,给出了信道中各种不同类型业务的业务量与冲突概率的关系,并提出了一种信道选择方法,选出最佳的接入信道,以平衡各信道中的业务量,解决了原协议中无信道选择策略可能带来的信道拥塞问题.仿真结果表明,采用本文的信道选择策略,可有效提高站点的平均吞吐率.The authors proposed a Markov chain model and a continuous idle slots model for the transmission mechanism of IEEE 802.11p/1609.Using these two models,we got the conflict probability of WAVE system,on the basis of which,a channel chose policy was presented to get the best access channel.This policy can balance the throughput of all the channels and solve the channel congestion problem in the basal protocol.The simulation results show that the average throughput rate was improved obviously.

关 键 词：IEEE802.11p/1609 WAVE 冲突估计 信道选择 

分 类 号：TN820[电子电信—信息与通信工程]