一种基于方向优先的车载Ad hoc路由策略*

针对城市车载网络在十字路口路由选择效率低下的问题，结合已有的地理位置路由协议，提出一种基于方向优先的地理位置路由策略。该策略通过信标的广播信息确定节点的类型，是属于普通节点、预测节点或者十字路口节点；然后再判断采取什么样的方式转发数据包，普通节点采取贪婪转发的方式,预测节点采取受限的贪婪转发，而十字路口节点决定路由策略的方向。通过NS2仿真分析，该路由策略能够以更少的跳数、更短的路径成功传递数据包。

Routing strategy based on preferential direction for vehicular Ad hoc networks

Combing the existing geographical routing protocols,this paper proposed an improved geographical routing strategy based on direction preference aiming at the inefficient routing at the intersection for urban vehicular Ad hoc networks.The strategy first determined the type of the node by broadcast information of beacon,the ordinary node forward the packet by greedy method,then forecasting node predict the next node whether to go through the intersection node,and while the intersection node decisioned the dir...