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针对容延容断网络(Delay/Disruption Tolerant Networks,DTN)不包含持续端到端连接、高传输时延及节点资源受限的特点,提出一种新的基于位置信息的喷射路由算法.该算法通过与GPRS网络结合形成平行网络结构,将GPRS作为DTN的一个通信频道以辅助路由,利用通信频道中已知的节点位置信息弥补DTN缺乏网络拓扑知识的不足,根据节点接触时的相遇角度调整Spray策略,减少无效信息副本的产生,Spray阶段完成后根据当前节点、目标节点及目的节点的位置和速度信息进行单副本路由,从而使传输过程中的信息路由具有方向性和目的性,减少对网络资源的消耗,降低传输时延并提高传输率.仿真结果表明本文所提出的算法是有效可行的,综合性能优于典型DTN路由算法Spray and wait和MaxProp.
Aiming at the characteristics that Delay / Disruption Tolerant Networks (DTN) does not contain continuous end-to-end connection, high transmission delay and limited node resource, a new location routing algorithm based on location information is proposed. By combining with the GPRS network to form a parallel network structure, GPRS is used as a communication channel of the DTN to assist the routing. The known node location information in the communication channel is used to make up for the lack of DTN lack of network topology knowledge. The Spray is adjusted according to the contact angle Strategy to reduce the generation of invalid information copies. After the Spray phase is completed, the single copy routing is performed according to the location and speed information of the current node, the target node and the destination node, so that the information routing in the transmission process has directionality and purpose, Resource consumption, reduce transmission delay and increase transmission rate.The simulation results show that the proposed algorithm is effective and feasible, and the overall performance is better than the typical DTN routing algorithms Spray and wait and MaxProp.