提出了一种基于S3C2440A硬件平台和嵌入式linux操作系统,整合GPS定位信息处理、802.11 DCF模式无线网络传输、LCD液晶触摸屏显示查询等功能,实现高速公路上车辆与车辆间Ad hoc模式通信的车载导航终端设计。在网络层上采用更新车辆信息表,根据分段概率重播机制选择中继转发节点等机制,解决减少多余广播、竞争、碰撞等问题。该终端有良好的人机交互界面,使用户能实时获取紧急信息、道路信息、周围车辆信息,实现安全驾驶。
The design of vehicular navigation using Ad hoc mode is discussed,which is based on S3C2440A and embedded Linux OS.It contains GPS location information processing,802.11 DCF wireless transmission,and LCD touch screen display.At the network layer,this paper proposes some solutions to alleviate broadcast redundancy and collision,which are establishing a table of vehicle information and proposing slotted p-persistence scheme to retransmit the packet.