机会传感器网络中节点协商的数据分发机制  

Data dissemination mechanism with node negotiation in opportunistic sensor networks

作　　者：沈海澜[1] 陈志刚[1] 漆华妹[1] 陈再良[1] 

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《华中科技大学学报（自然科学版）》2010年第8期17-20,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家高技术发展研究计划资助项目(2008AA7034060B);国家自然科学基金资助项目(60873082);总装预研基金资助项目(9140A15030308QT4801)

摘　　要：针对机会传感器网络数据分发中如何降低网络通信开销、减少延迟并提高分发可靠性的问题,提出了基于节点动态协商策略的性能均衡的数据分发机制(EEDP).其核心思想是每个节点都建立有一个称为分发能力因子的评价指标,由节点的能量水平和节点与分发目标节点的相遇概率确定.在数据分发过程中,利用贪婪策略,不断寻找分发能力因子最高的部分节点承担分发任务,以加快分发速度并保持节点负载均衡.仿真结果表明,相比于谣言传播分发协议和定向分发协议,所提机制在通信开销、分发延迟及可靠性之间达到较好的平衡.The problems of the cost of network communication, dissemination delay and reliability in the process of data dissemination in opportunistic sensor networks this paper proposes a performancebalanced and energy-efficient dissemination protocol EEDP （energy efficient dissemination protocol） based on node dynamic negotiation. The main idea of this mechanism is every node keeps a factor called disseminated ability which is decided with the node＇s energy level and the probability of meeting the dissemination objects nodes. Then in the process of data dissemination, with a greedy method, the nodes with more disseminating ability are dynamically chosen to disseminate the data. Simulation experiment results show that the proposed mechanism can achieve better balance between the cost of communication, dissemination delay and reliability.

关 键 词：传感器网络 数据分发 负载均衡 机会网络 节点协商 分发能力因子 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]