Delay-aware reliable broadcast scheme based on power control for VANETs  

作　　者：GUO Wei-jie HUANG Liu-sheng SUN Quan XU Hong-li ZHANG Hao-ran 

机构地区：[1]School of Computer Science and Technology,University of Science and Technology of China [2]Suzhou Institute for Advanced Study,University of Science and Technology of China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2014年第1期26-35,共10页中国邮电高校学报（英文版）

基　　金：supported by the National Basic Research Program of China(2011CB302905);the National Natural Science Foundation of China(61170058);National Science and Technology Major Project(2011ZX03005-004-04,2012ZX03005009);the Research Fund for the Doctoral Program of Higher Education of China(20103402110041,20123402110019);the Guangdong Province and CAS Comprehensive Strategic Cooperation Projects(2012B090400013);the Fundamental Research Project of Suzhou(SYG201143)

摘　　要：In vehicular Ad-hoc network（VANET）, many multi-hop broadcast schemes are employed to widely propagate the warning messages among vehicles and the key is to dynamically determine the optimal relay vehicle for retransmission. In order to achieve reliable and fast delivery of warning messages, this paper proposes a delay-aware and reliable broadcast protocol（DR-BP） based on transmit power control technique. First, a comprehensive model is derived to evaluate the transmission in vehicle-to-vehicle communications. This model considers the wireless channel fading, transmission delay and retransmissions characters occurring in the physical layer/medium access control（PHY/MAC） layer. Then, a local optimal relay selection mechanism based on the above model is designed. In DR-BP scheme, only the vehicle selected as the optimal relays can forward warning messages and the transmit power is time-varying. Finally, extensive simulations verify the performance of DR-BP under different traffic scenarios. Simulation results show that DR-BP outperforms the traditional slotted 1-persistence（S1P） and flooding scheme in terms of packets delivery ratio and transmission delay.In vehicular Ad-hoc network（VANET）, many multi-hop broadcast schemes are employed to widely propagate the warning messages among vehicles and the key is to dynamically determine the optimal relay vehicle for retransmission. In order to achieve reliable and fast delivery of warning messages, this paper proposes a delay-aware and reliable broadcast protocol（DR-BP） based on transmit power control technique. First, a comprehensive model is derived to evaluate the transmission in vehicle-to-vehicle communications. This model considers the wireless channel fading, transmission delay and retransmissions characters occurring in the physical layer/medium access control（PHY/MAC） layer. Then, a local optimal relay selection mechanism based on the above model is designed. In DR-BP scheme, only the vehicle selected as the optimal relays can forward warning messages and the transmit power is time-varying. Finally, extensive simulations verify the performance of DR-BP under different traffic scenarios. Simulation results show that DR-BP outperforms the traditional slotted 1-persistence（S1P） and flooding scheme in terms of packets delivery ratio and transmission delay.

关 键 词：transmission range delay-aware RELIABLE power control relay selection VANET 

分 类 号：TN929.5[电子电信—通信与信息系统]