摘要
根据车载自组织网络节点移动速度快、网络拓扑变化频繁的特点,提出基于地理位置改进的车载网络路由协议SCGP。SCGP是一种将直路转发和十字路口转发相结合的新的转发策略,在直路中采用贪婪转发算法,当在十字路口时采用方向—速度转发机制,根据车辆的移动方向和速度,预测出车辆的位置,选择可靠的下一跳节点,进而保证路由选择的可靠性。在NS2仿真平台下,采用TIGER地理信息数据库,产生真实移动城区场景和接近现实车辆移动模型,并与GPSR路由协议进行比较。仿真表明SCGP路由协议有较好的性能。
According to the characteristics of nodes moving fast and frequent network topology changes in vehicle Ad hoc networks,we propose a geographical position-based improved vehicular network routing protocol SCGP. It is a new forwarding strategy incorporating the straight forwarding and the crossroads forwarding together,uses greedy forwarding algorithm in straight road while uses direction-velocity forwarding algorithm in crossroads. It predicts the position of the vehicles and selects reliable next hop node according to the moving direction and the velocity of the vehicles,so that ensures the reliability of routing selection. By making use of TIGER geographic information database on NS2 simulation platform,we generate a real moving urban scene and the vehicle moving model approximating to the reality,and compare it with GPSR routing protocol. Simulation shows that SCGP routing protocol has better performance.
出处
《计算机应用与软件》
CSCD
北大核心
2014年第8期118-120,125,共4页
Computer Applications and Software
基金
海南自然科学基金项目(613165)
