摘要
通过将来自多条链路的数据包融合为一个单独的编码信息流进行传输,网络编码技术能够显著地提高无线多跳网络的容量。提出一种基于区分服务的异构无线传感器网络编码协议(DBNC)。协议的核心思想是周期性地计算节点剩余能量的均值和标准差,对节点进行动态分类。在此基础上,将服务质量需求映射到网络编码协议中。为此,引入能量感知编码包转发机制,以高效地利用节点的能量;另一方面,设计多优先级数据包调度策略,目的是创造更多的编码机会。仿真结果表明,DBNC不仅可以保障数据的可靠传输,而且可有效地减少低能量节点的能耗,从而延长网络的生命周期。
By combining multiple packets in a single broadcast transmission,network coding can greatly improve the capacity of multi-hop wireless networks.This paper proposed a diffserv-based network coding protocol（DBNC） for hetero-geneous wireless sensor networks.The main idea is to compute periodically the mean and standard deviation of resi-dual energy of nodes,together with a dynamic node classification.On this basis,the QoS requirements are mapped to network coding metrics.For this purpose,we introduced an energy-aware forwarding mechanism for coded-packet.Meanwhile,a multi-priority packet scheduling strategy was designed to increase the opportunities for coding.Our simulation results demonstrate that DBNC achieves a significant improvement in energy efficiency,as well as in reliability of data transmission.
出处
《计算机科学》
CSCD
北大核心
2012年第11期29-33,共5页
Computer Science
基金
国家自然科学基金项目(60673185,61073197)
江苏省自然科学基金项目(BK2010548)
江苏省科技支撑计划(工业)项目(BE2011186)
江苏省普通高校研究生科研创新计划项目(CXLX11_0262)
南京大学计算机软件新技术国家重点实验室开放课题(KFKT2010B08)资助
关键词
异构无线传感器网络
无线网络编码
区分服务
能量感知
Heterogeneous wireless sensor networks
Wireless network coding
DiffServ
Energy-aware
