交通运输系统工程与信息

交通运输系统工程与信息 ›› 2015, Vol. 15 ›› Issue (6): 88-93.

• 智能交通系统与信息技术 • 上一篇    下一篇

一种高动态交通场景下的协作接入协议

张延康*1，张蓓蓓2，张海洋2   

  1. 1. 中国石化胜利石油管理局胜利发电厂，山东东营257087； 2. 西安电子科技大学综合业务网理论及关键技术国家重点实验室，西安710071
  • 收稿日期:2015-05-18 修回日期:2015-09-05 出版日期:2015-12-25 发布日期:2015-12-25
  • 作者简介:张延康（1976-），男，河南南阳人，高级工程师.
  • 基金资助:

    国家自然科学基金（61271176）.

A Cooperative MAC Protocol in High Dynamic Transportation Network

ZHANG Yan-kang1, ZHANG Bei-bei2, ZHANG Hai-yang2   

  1. 1. Shengli Power Plant, Shengli Oil Company, SINOPEC, Dongying 257087, Shandong, China; 2. State Key Laboratory of Integrated Services Networks, Xidian University, Xi’an 710071, China)
  • Received:2015-05-18 Revised:2015-09-05 Online:2015-12-25 Published:2015-12-25

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被引次数

1

摘要：

车辆自组织网络(Vehicular Ad Hoc Network, VANET)能够提高人们出行的安 全性和舒适性，成为学术界和工业界的研究热点.然而由于NET特殊的应用场景，如拓扑 高动态、节点高密度、信道质量的不稳定等特性，导致网络中数据的可靠性难以得到保证. 我们在传统自组织网络的研究成果基础上，提出了基于TDMA (Time Division Multiple Access)的分布式协作MAC (Media Access Control)协议，称之为C-T-MAC(Cooperative TDMA MAC).C-T-MAC算法引入了协作通信的概念.源节点与目的节点传输失败后，选 定的协作节点选择网络中一个空闲的时隙向目的节点转发数据，完成协作通信过程.仿真 结果表明，C-T-MAC算法提高了网络的吞吐量和数据传输的可靠性.

关键词: 交通工程, 协作通信, 时分多址, 媒体访问控制, 车辆自组织网络

Abstract:

Vehicular Ad Hoc Network can improve traffic safety and efficiency, and it attracts close attention from academia and industry. However, the features in special VANETs scenario, such as highly dynamic topology, high traffic density, unstable links, and so on, cause that it is hard to maintain the reliable data dissemination. Based on the existing MAC layer protocol research results of Ad Hoc network, associating with the special scenarios of VANET, a novel distributed TDMA algorithm named C-T-MAC is designed, and it introduces the concept of cooperative communication. When the transmission between source node and destination node fails, destination node could accept the help of neighbor nodes in idle time slot. Through this can increase the network throughput and the reliability of data. At last, the proposed algorithm in NS- 2 simulation platform is verified. The simulation results show that the algorithm can improve the reliability of information and the utilization of slot in a certain extent.

Key words: traffic engineering, cooperative communication, TDMA, MAC, VANET

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