基于S-MAC改进的自适应占空比机制研究  

Based on S-MAC to Improve the Mechanism of Adaptive Duty Cycle

作　　者：徐昌彪[1] 李泽宇[1] 刘琳[1] 

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《电信科学》2010年第7期84-87,共4页Telecommunications Science

基　　金：重庆市科技攻关计划基金资助项目(No.2008AB2023)

摘　　要：S-MAC协议作为经典的基于无线传感器网络的MAC协议引起了人们的普遍关注。本文根据S-MAC固定占空比机制,提出了一种基于负载控制的自适应占空比调整的MAC协议——DSMAC。在DSMAC中,设定一个节点定时器,通过判断单位时间内负载情况,动态调整占空比,该协议旨在改善S-MAC固定占空比不能适应负载变化以及延迟过大的不足。利用NS2仿真工具对DSMAC进行了仿真,结果显示DSMAC协议不仅能够显著地提高吞吐量,减少时延,还能有效提高能量效率,在提高网络性能的同时达到节能的目的。As a classical protocol based on wireless sensor networks MAC protocol,S-MAC has already aroused people’s general concern.In terms of S-MAC fixed duty cycle mechanism,this paper provides DSMAC protocol,which based on load control of adaptive duty cycle adjustment MAC protocol.In DSMAC,set a node timer so as to dynamical adjust duty cycle through judging unit time load situation.This protocol aims at ameliorate S-MAC fixed duty cycle can not adapt to load variety,and excessive delay.We have simulated DSMAC through NS2,the results show that DSMAC can not only significantly improve the throughput,lower latency,but also effectively improve the energy efficiency,improve network performance while achieving energy saving purpose.

关 键 词：无线传感器网络 传感器媒体访问控制 占空比 

分 类 号：TN86[电子电信—信息与通信工程]