关系强度感知的能量有效性无线DTN路由机制

节点的社会性与能量有限性严重影响延迟容忍网络（delay tolerant network, DTN）性能。提出了关系强度感知的DTN能量有效性路由机制，利用消息平均转发时间衡量节点间的关系紧密程度，并根据邻居节点的能量状态和相遇概率优化转发决策，同时采用社会属性关联的消息优先级机制提高缓存利用率。结果表明，所提出的路由机制显著地延长了网络存活时间，改善了消息投递率和网络开销性能。

Relation strength aware energy efficient routing mechanismin wireless DTN networks

The performance of delay tolerant network (DTN) suffers from the social nature and energy limitation of nodes. To solve the problem, a relation strength aware energy efficient routing mechanism is introduced. The average message forward time is used to reflect the relationship between nodes. Furthermore, the residual node energy level and contact probability are both considered to optimize the forwarding strategy. Meanwhile, in order to raise the utilization ratio of buffer, the message priority is defined according to the relation between nodes. Results indicate that the proposed algorithm prolongs the lifetime of the networks dramati cally, raises the message delivery probability and improves network overhead performance significantly.