多信道协同合作需求感知MAC协议  

Coordinated Multichannel Demand-Aware MAC Protocol

作　　者：高凯强[1] 赵海涛[1] 李大鹏[1] GAO Kai-qiang;ZHAO Hai-tao;LI Da-peng(College of Communication and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《应用科学学报》2018年第4期580-588,共9页Journal of Applied Sciences

基　　金：国家"973"重点基础研究发展计划基金(No.2013CB329005);国家自然科学基金(No.61771252;No.61471203);江苏省基础研究项目基金(No.20171444);江苏省"六大人才高峰"基金(DZXX-041);江苏省普通高校专业学位研究生实践创新计划项目基金(No.JSCX17_0224)资助

摘　　要：车辆自组织网络中的应用可以分为安全性和非安全性两种.安全性应用主要处理紧急路况等问题,对通信的时延和可靠性有严格要求.为此,提出一种基于多信道协同合作的需求感知介质访问控制协议,该协议由路边单元广播安全询问数据包以提前预约控制时隙,实现车辆节点无碰撞地发送紧急信息的目的,并根据安全数据的需求量动态划分控制时隙和服务时隙,促使每一个节点都能通过路边单元动态调度的方式按序广播安全信息,降低了分组碰撞的概率.仿真结果表明,所提出的介质访问控协议与传统的IEEE 802.11p协议相比,能够提高网络吞吐量,降低端到端的传输时延.The applications of vehicle self-organizing network are generally divided into the two types of security and non-security. Security applications mainly deal with issues such as emergency road conditions. Therefore, the delay and reliability of communication are strictly required for security applications. In this paper, we proposed a kind of demand- aware medium access control protocol based on multichannel cooperative cooperation in vehicular ad hoc networks. First, the proposed protocol broadcasts the security query packets through roadside units, which send the emergency information of vehicle nodes in the control slots reserved in advance. The division of time slot is dynamically provisioned according to the demand of security data of each node. Thus, all nodes will be coordinated by RSU in order to reduce the collision probability and the delivery delay of data packets. Simulation results show that the media access control protocol proposed in this paper can improve the network throughput and reduce the end-to-end transmission delay, compared with the traditional IEEE 802.11p protocol.

关 键 词：车辆自组织网络 多信道协同合作 需求感知 MAC协议 

分 类 号：TN91[电子电信—通信与信息系统]