基于协议序列平均分配算法的VANET信道接入机制

发布时间：2018-01-04 00:36

本文关键词：基于协议序列平均分配算法的VANET信道接入机制　出处：《通信学报》2016年04期 　论文类型：期刊论文

【摘要】：为了提高VANET中节点的吞吐量性能,提出基于协议序列平均分配算法的信道接入机制。在高速公路场景下,规划IEEE 802.11p业务信道与竞争区段的映射,并根据用户保障序列的特性设计帧结构。通过少量反馈确定竞争区段的节点数,并提出循环轮流分配法实现平均意义上非整数个序列的分配。仿真结果证明了理论分析的有效性,在实际路况中均分法与经典方法相比吞吐量性能明显改善,并且节点越稀疏、物理层数据传输速率越高,吞吐量性能提升越明显,同时可保持较低的网络开销和较好的信道接入公平性。
[Abstract]:In order to improve the throughput performance of nodes in VANET, a channel access mechanism based on protocol sequence assignment algorithm is proposed. The mapping between the IEEE 802.11p traffic channel and the competing segment is planned, and the frame structure is designed according to the characteristics of the user security sequence. The number of nodes in the competing segment is determined by a small amount of feedback. A cyclic rotation allocation method is proposed to distribute the non-integer sequences in the average sense. The simulation results show that the theoretical analysis is effective and the throughput performance of the method is significantly improved compared with the classical method in the actual road conditions. The more sparse the nodes, the higher the data transmission rate in physical layer, the higher the throughput, the lower the network overhead and the better the fairness of channel access.
【作者单位】：福建师范大学光电与信息工程学院;
【基金】：国家自然科学基金资助项目(No.61571128) 教育部高等学校博士学科点专项科研(新教师类)基金资助项目(No.20133503120003) 福建省自然科学基金资助项目(No.2013J01224) 福建省科技厅工业科技计划重点基金资助项目(No.2014H0019)~~
【分类号】：TN929.5
【正文快照】： 1引言车载自组织网(VANET,vehicular ad hoc net-work)[1]已成为智能交通的重要组成部分,其自组织特性将成为现有移动通信网络的重要补充。VANET隶属于移动自组织网(MANET,mobilead-hoc network)的范畴,但其节点的快速移动性、拓扑的高度动态性以及节点运动受道路制约的规律性

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