摘要
简述了IEEE802.15.4MAC协议中超帧结构和保护时隙(GTS)分配机制,分析了星状网络中信标使能模式下设备节点利用GTS方式通信时超帧结构中各参数对能耗与时延性能的影响。在此基础上设计了一种GTS调度新算法,该调度算法对时延期限小的节点优先进行GTS分配并在满足其时延要求情况下,根据业务量调节超帧结构中的超帧序号SO与信标序号BO,使设备节点能耗降到最低,从而实现星状网络中各节点的能耗与时延均衡,并用NS2仿真评估了调度新算法性能,其研究可为无线传感网络的实时应用系统提供参考价值。
The guaranteed time slots（GTS） allocation mechanism and superframe struction in IEEE 802.15.4 are elaborated, the impacts of parameters in superframe struction on energy consumption and time delay is analyzed in beacon-enable star network where devices communicate through GTS mode. A new GTS allocation mechinism scheduling algorithm, which allocates GTS to device with low time delay bound firstly and adjusts the value of SO and BO in superframe according to the burst of device to minimize energy consumption, designed to meet with trade-off of energy consumption and time delay of devices in star network, then, the performance evalution of the new scheduling algorithm is performed with NS2 simulator, the research is significant to promote the WSN＇application in real-time system.
出处
《微型机与应用》
2010年第1期51-54,共4页
Microcomputer & Its Applications
基金
广东省软科学资助项目(2008B070800029)
暨南大学引进优秀人才科研启动基金资助项目(51205068)
