基于节点综合效能的DTN路由算法

针对容忍延迟网络(DTN)高延迟、数据传输成功率低等问题,提出了一种基于节点综合效能的DTN路由算法SERA。该算法综合考虑移动节点的活跃度和剩余能量,使消息副本向综合效能高的节点扩散。SERA节点活跃度描述了节点的社会和动态特性,SERA尽量将消息副本传递给活跃度高的节点,以提高消息传输的成功率;在选择中继节点时,充分考虑节点的能量状态,以避免能量不足的节点承担更多的信息传输任务,从而提高网络节点的存活率。仿真结果表明,与典型的DTN路由算法相比,SERA能够更好地平衡节点的能耗,获得更高的消息递交成功率和更长的网络生存期。

Synthetical Effectiveness Based DTN Routing Algorithm

Delay-Tolerant Network (DTN)is a type of new network characterized by long delay, frequent movement and low message delivery ratio. This paper presents a routing alogrithm based on synthetical effectiveness of nodes, called SERA. The SERA combines the activity of nodes with remaining energy, and sprays message copies to nodes with stronger synthetical effectiveness. In SERA,the node activity describes the social and dynamic characteristic of nodes. So,SERA tries to transfer message copies to nodes with higer activity in order to impove the success rate of message transimission. Furthermore,it can select nodes based on the energy state to avoid nodes without engouh energy to take on more transimisson tasks,thus protecting the survival of network nodes effectively. Simulation results show that SERA can balance the energy consumption of nodes better,and thus increase the sussess ratio of the message delivery and prolong the lifetime of WSN,compared with other typical routing algorithms.