传感器网络中一种基于梯型休眠调度的MAC协议  

A Wireless Sensor Network MAC Protocol Based on the Ladder Pattern Wakeup Scheduling

作　　者：蹇强[1] 温俊[1] 龚正虎[1] 桂春梅[1] 

机构地区：[1]国防科技大学计算机学院,湖南长沙410073

出　　处：《计算机工程与科学》2009年第3期19-23,共5页Computer Engineering & Science

基　　金：国家973计划资助项目(2003CB314802);国家自然科学基金资助项目(60603061)

摘　　要：如何在提供能量高效数据通信的同时满足必要的延迟需求,是无线传感器网络MAC协议面临的一大挑战。本文提出一种基于梯型休眠调度的MAC协议——LP-MAC,通过安排传输路径上的节点连续转发数据从而消除休眠延时;采用冲突避免机制和基于链路计数器的临时唤醒机制,减少兄弟节点间冲突并增加节点休眠时间,进一步提高协议能量效率。理论分析和模拟实验表明,LP-MAC协议既具有低能耗的协议特性,也能保证较低的稳定的端到端延时。How to provide energy-efficient communication without necessarily sacrificing application-specific latency performance is a key challenge confronting wireless sensor network MAC protocols. In this paper, LP-MAC, a MAC protocol based on ladder pattern wakeup scheduling is proposed. By arranging the nodes in a multi-hop path to forward data continuously, the wakeup delay is eliminated; by the conflict avoidance scheme and the temporary wakeup mechanism based on link counters, the conflicts between the sibling nodes are decreased and the sleeping time of nodes is increased, which further improves the protocol＇s energy efficiency. The theoretical analysis and simulation results show that, the LP-MAC protocol has both low-energy consumption and stable low end-to-end delay.

关 键 词：无线传感器网络 MAC协议 休眠调度 能量高效 低延时 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]