摘要
针对车载自组网VANET中使用基于位置的GPSR路由协议可能引起的数据反复重传和丢失问题,在选择下一跳节点时将最远转发(MFR)策略改进为非最远转发(NMFR)选择策略,并结合方向优先策略划分相邻节点的优先级,依据综合优先级选择下一跳节点,从而降低端到端时延,提高包交付率.仿真实验表明:改进算法对下一跳转发路径的选取比较稳定,并且可以改善平均端到端延时、丢包率等性能,提高了网络的整体性能.
Due to the use of location based GPSR routing protocol in vehicular Ad hoc networks, repeated retransmission and data loss may be caused. In this research, the non-most forwarded within radius （NMFR） strategy was used to improve the forwarded within radius （MFR） selection strategy in choosing the next hop. During the process, direction priority strategy was used to decide on the priority of the adjacent node. At last, the next hop node was selected based on comprehensive pri- ority. This method can reduce the end-to-end delay and increase the packet delivery rate. Simulation results show that the improved algorithm can select the next hop forwarding path relatively stable; the average end-to-end delay and packet loss rate have been reduced; and the overall performance of the network is better than that with the old method.
出处
《天津科技大学学报》
CAS
北大核心
2017年第3期73-78,共6页
Journal of Tianjin University of Science & Technology
基金
国家自然科学基金资助项目(61272509)
高等学校博士学科点专项科研基金(20136118110002)
关键词
VANET
GPSR
非最远转发
方向优先
丢包率
VANET
GPSR
non-most forwarded within radius
direction priority
packet loss rate
