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在多速率Ad Hoc网络中,为了更好地利用IEEE 802.11标准支持物理层的多速率能力从而提高系统的吞吐量,提出一种基于地理位置预测机制的LP-RAI路由判据,LP-RAI判据具有熵函数的形式,结合GPS系统提供的节点地理位置信息,在路由发现阶段,利用ARIMA预测模型实时预测出节点下一时刻的地理位置并计算下一时刻节点间的距离,通过下一时刻节点间的距离选择最优路径进行数据传输,通过比较下一时刻节点间距离和默认通信距离判断算法的应用条件.将LP-RAI算法替代AODV路由协议的最小跳数判据.仿真结果表明LP-RAI AODV路由协议可明显改善网络整体性能.
In the multi-rate Ad Hoc network, in order to make full use of the IEEE 802.11 standard to support the multi-rate capability of the physical layer to improve the system throughput, a LP-RAI routing criterion based on the geographic location prediction mechanism is proposed. The LP-RAI decision According to the form of entropy function, combined with the geographic location information provided by the GPS system, in the route discovery phase, the ARIMA predictive model is used to predict the geographical location of the node at the next moment in time and calculate the distance between the nodes at the next moment. Through the next moment The distance between the nodes chooses the optimal path for data transmission and compares the application conditions of the algorithm by comparing the distance between nodes and the default communication distance at the next time.The LP-RAI algorithm replaces the minimum hop count criterion of AODV routing protocol.The simulation results show that LP -RAI AODV routing protocol can significantly improve overall network performance.