摘要
机会网络中的ProPhet等路由算法根据机会网络中节点的相遇频率进行节点之间消息的传递,不考虑节点每次相遇的持续时间以及节点中缓存剩余情况。在机会网络内部节点之间的移动速度很快的情况下,采用这些路由算法会使网络内数据的传输效率急剧下降。针对这一不足,结合ProPhet路由算法,计算节点之间的传输概率时充分考虑节点的相遇持续时间以及剩余缓存对节点之间传输概率的影响,使节点之间能更有效地传输数据。仿真结果表明,在给定的移动模型下,该算法能够有效提高消息传递成功率,降低网络中能量消耗等开销。
Routing algorithms of opportunistic network such as ProPhet transmit message among nodes based on encounter frequency in network,which fail to consider the encounter duration and the remnant buffer size of nodes.The efficiency of message transmission be-comes poor in the condition that nodes in the opportunistic network move very fast.An improved ProPhet algorithm was proposed which decided the message transmission probability of nodes based on the effect of the encounter duration and the remnant buffer.The improved ProPhet algorithm can make opportunistic network transmit message more efficiently.The simulation results show that for the given mo-bile model,the algorithm can improve the delivery ratio and reduce the overhead of opportunistic networks.
出处
《计算机工程与设计》
北大核心
2015年第5期1145-1149,1218,共6页
Computer Engineering and Design
基金
国家自然科学基金项目(61173094
61373083)
