一种基于地理位置信息的机会网络路由

An Opportunistic Network Routing Based on Geographic Position Information

机会网络中节点无限制且盲目的消息泛洪策略不仅会产生巨大的网络开销,而且受限于节点的移动性,无法在短时间内实现消息副本的快速扩散与交付。因此,设计了一种基于地理位置信息的机会网络消息副本分配策略(Geographic Location Message Copy Allocation,GLMCA)。该策略令有限消息副本在网络中按最大扩散方向多次转发,使消息副本能够在短时间内在网络中扩散。利用仿真平台对GLMCA策略与传染病(Epidemic)策略、喷射等待(Spray and Wait,SAW)策略进行仿真对比。仿真结果表明,GLMCA策略在低节点密度场景下短时间内消息投递率提升60%以上,且具有优秀的平均时延和网络开销表现。

The unrestricted and blind message flooding strategy of nodes in opportunistic networks not only causes huge network overhead, but also cannot realize rapid diffusion and delivery of message copy in a short time due to the mobility limitation of nodes. Therefore, a GLMCA(Geographic Location Message Copy Allocation) strategy based on geographic position information is designed. This strategy enables the limited message copy to be forwarded multiple times in the direction of maximum spread, so that the message copy can be spread in the network in a short time. A simulation platform is used to compare the GLMCA strategy with the Epidemic strategy and SAW(Spray and Wait) strategy. The simulation results indicate that the GLMCA strategy can improve the message delivery rate by more than 60% in a short time under the scenario of low node density, and has excellent performance of average delay and network overhead.