如何将节点收集到的数据有效的传递到汇聚点是移动传感器网络(mobile sensor network,MSN)中数据传输需要解决的主要问题,在面向社会环境的MSN中,可利用节点载体的行为特性来辅助设计数据传输方法,为此提出基于社会行为的数据传输策略(social behavior based data delivery scheme,SBD),其综合利用了人具有偏好地点以及社会活跃性不同等社会特性来辅助数据传输,并利用消息被汇聚点接收的可能性来决定队列中消息的发送顺序和丢弃原则。基于节点真实移动轨迹的实验表明,SBD较好的实现了数据传输成功率和传输能耗以及传输延迟之间的平衡。
Timely and cost-efficient multi-hop data delivery among vehicles is essential for vehicular ad-hoc networks (VANETs), and various routing protocols are envisioned for infrastructure-less vehicle-to-vehicle (V2V) communications. Generally, when a packet (or a duplicate) is delivered out of the routing path, it will be dropped. However, we observe that these packets (or duplicates) may also be delivered much faster than the packets delivered along the original routing path. In this paper, we propose a novel tree based routing scheme (TBRS) for ultilizing the dropped packets in VANETs. In TBRS, the packet is delivered along a routing tree with the destination as its root. And when the packet is delivered out its routing tree, it won't be dropt immediately and will be delivered for a while if it can arrive at another branch of the tree. We conduct the extensive simulations to evaluate the performance of TBRS based on the road map of a real city collected from Google Earth. The simulation results show that TBRS can outperform the existing protocols, especially when the network resources are limited.
SONG ChaoLIU MingGONG Hai-gangCHEN Gui-haiCAO Jian-nong
