无线传感网基于 PageRank 算法的 S-MAC 协议的改进 郭立星,张雷** 5 10 15 20 25 30 35 (北京邮电大学网络技术研究院,北京 100876) 摘要:S-MAC 协议采用的固定占空比,降低能耗的同时增加端到端的延迟,而且不能适应 网络负载的变化。为了达到能耗和延迟之间的平衡,提出了一种基于 PageRank 算法的自适 应占空比 SMAC 协议(PR-SMAC)。通过发送节点中数据包的大小和占空比,计算出接收 节点的占空比,能很好的反应出当前网络负载的情况。仿真结果证明,与 S-MAC 协议相 比,该协议在能耗和延时方面都有很好的改善。最后指出了未来的研究策略和重点。 关键词:无线传感网;MAC 协议;能耗;占空比 中图分类号:TP311 The of S-MAC Protocol based on PageRank algorithm in Wireless work GUO Lixing, ZHANG Lei (Institute work Technology, Beijing University of Posts and munications, Beijing 100876) Abstract: Lowering the energy consumption may result in higher latency in S-MAC based on fixed duty cycle, which performs poorly in the dramatically changing traffic in Wireless Sensor Network(WSN). Based on this problem, the paper proposes a MAC protocol based on PageRank(PR-SMAC) that dynamically adjusts the node’s duty cycle based on the changing traffic. By the packet size and duty cycle of the sending node, the duty cycle of the receiving node is calculated, reflecting the current situation work load. Simulation results show that PR-SMAC reduces the energy consumption and pared with S-MAC. Finally, the status of current research development are concluded and the open research issues on MAC layer design are pointed out. Key words: Wireless works(WSN);MAC Protocol;Energy consumption;Duty Cycle 0 引言 当前大数据信息的传输和获取,极大推动了集信息采集、处理和传输为
