摘要
面向应急监控应用的无线传感器网络的通信面临着由于网络拓扑的动态性和时变性,以及应急灾难事件突发区域数据量剧增而造成的网络数据传输冲突严重等问题。针对这些问题,提出一种融合物理层功率控制、MAC层的链路调度和网络层路由的跨层通信设计思路,分别给出了集中式和分布式算法,以实现面向应急场景的实时、健壮且低干扰的数据通信。采用NS2进行模拟,实验结果表明提出的算法在应急监控应用中,随着设定灾难模型蔓延和扩大以及数据源增加的情况下,都具有良好的数据投递率、实时性和能量效率;提出的机制适用于各类型灾难应急场景,与同类研究相比具有其优越性。
Wireless sensor networks in emergency monitoring applications have two challenges to face：the dynamic and time-varied network topology, and the serious collisions among emergency event areas. According to the above problems, this paper proposed cross-layer communication design by joint power control, MAC and routing together. It presented a centralized and dis- tributed solution respectively. The solutions achieve real-time, robust and low-interference data transmissions. The NS2 simula- tion results show that the solutions have good performance of delivery ratio, timeliness and energy efficiency, as the emergency events spread and expand as well as the increased data source. The proposed scheme is more suitable for emergency applications with effectiveness compared with related work.
出处
《计算机应用研究》
CSCD
北大核心
2012年第10期3914-3918,共5页
Application Research of Computers
基金
中央高校基本科研业务费专项资金青年教师资助项目(111093)
国家自然科学基金青年科学基金资助项目(61103218)
国家"973"计划资助项目(2011CB707100)
湖北省自然科学基金资助项目(2011CDB446)
关键词
无线传感器网络
通信设计
跨层
应急监控
wireless sensor network
communication design
cross-layer
emergency monitoring
