稀疏机会网络中基于固定中继节点与消息相关性的缓存管理策略

针对稀疏机会网络中固定中继节点和移动节点间的相遇频率以及缓存资源的差异性问题,在多副本路由协议中,提出一种结合固定中继节点重要性和消息相关性的缓存管理策略。该策略通过交互固定节点和移动节点的接触信息和消息队列信息,减少固定中继节点缓存中冗余消息的数量,从而合理地利用固定中继节点的缓存资源。仿真结果表明,所提的缓存管理策略能够在保证消息传输成功率的基础上提高固定中继节点缓存空间的利用率。

Buffer Management Based on Stationary Relay Nodes and Message Correlation in Sparse Opportunistic Networks

Aiming at the difference of contact frequency and buffer resources between fixed relay nodes and mobile nodes in the sparse opportunistic networks, a buffer management strategy combining the importance of fixed relay nodes with message correlation was proposed in the multiple copy routing protocols.The proposed strategy can reduce the number of redundant messages in the buffer of fixed relay nodes by interacting the contact information and the message queue information of fixed relay nodes and mobile nodes so that using the buffer space of fixed relay nodes reasonably.Experiments show that the proposed buffer management strategy can improve the cache space utilization of fixed relay nodes on the basis of guaranteeing the successful rate of message transmission.