After presenting weaknesses of several classic routing protocols applied in vehicular ad hoc networks （VANETs） by a qualitative comparison, this paper proposes a novel self-adaptive routing protocol, named ARPP. With respect to the specific characteristics of VANETs, the proposed routing protocol adopts a dynamic topology establishment and time-varying control message sending mechanism. A direction-based forwarding strategy and a specific warning solution enhance the routing performance in ARPP. Simulation results show that the ARPP protocol outperforms the classic AODV in urban vehicle environment.
Wang LeiYang YangWang XiaoboIbrahima Kalil ToureMi Zhenqiang
FIB表急剧增长是互联网高速发展面临的重要问题之一,FIB表分解存储能有效解决该问题.现有的SPAL技术将FIB表较均匀地分解存储在不同线卡,但仍然存在较多的表项冗余存储现象,并且实现复杂.对此设计了一种新型的转发表分解存储模型(Decomposed Storage of FIB,DSF),它依据IP前缀的前若干bit位实现线卡对转发表的分解存储,并只带来极少的冗余存储.DSF的改进方案———EDSF,更可使各线卡非常均衡地完成分解存储.提出的分解存储模型缓解了FIB表项急剧增长问题的解决压力,同时大大节省了硬件资源.对于线卡数量更多的可扩展路由器尤为适合.通过对当前运营的路由表的分解存储实验研究及与其它方案的比较,验证了文中模型良好的存储性能.
