A distributed MAC scheme for emergency message dissemination in vehicular ad hoc networks

被引:32
|
作者
Peng, Jun [1 ]
Cheng, Liang
机构
[1] Univ Texas Pan Amer, Dept Elect Engn, Edinburg, TX 78541 USA
[2] Lehigh Univ, Dept Comp Sci & Engn, Bethlehem, PA 18015 USA
关键词
hidden terminals; medium access control (MAC); priority; quality of service (QoS); vehicular ad hoc networks; vehicular communications networks;
D O I
10.1109/TVT.2007.906411
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The successful dissemination of emergency messages in vehicular ad hoc networks can make a difference between life and death. To achieve the life-saving goals, emergency message dissemination needs timely and lossless medium access in vehicular ad hoc networks. Although there are existing medium access control (MAC) protocols that support priority medium access in the literature, these protocols focus on providing statistical priority for unicast flows instead of strict priority for individual packets. This paper proposes a new MAC scheme to address this issue. With its novel pulse-based control mechanism, the proposed MAC scheme realizes strict packet-level priority scheduling for emergency packets in a fully distributed way. With the same mechanism, the proposed scheme supports multiple levels of strict priority for emergency packets. The comprehensive simulation results in this paper show the effectiveness of the proposed MAC scheme in serving emergency messages in vehicular ad hoc networks.
引用
收藏
页码:3300 / 3308
页数:9
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