IEEE802.15.4协议GTS算法性能研究  

Performance of GTS Mechanism in IEEE802.15.4 Protocol

作　　者：姜智文[1] 周熙[1] 李广位[1] 黄磊[1] 

机构地区：[1]重庆通信学院,重庆400035

出　　处：《通信技术》2014年第1期55-59,共5页Communications Technology

摘　　要：简单介绍了IEEE802.15.4标准中特有的GTS算法。基于OPNET仿真平台,设计了不同网络环境下的仿真实验。研究了超帧参数SO、数据到达率和IFS参数对GTS吞吐量、耗费带宽以及分组介质接入时延的影响。结果表明,对于高数据到达率时,低SO值和SIFS时,实现了GTS分配的最大化利用以及最小介质接入时延;高SO值和LIFS时,既没有保障GTS分配的最大化利用,反而还加大了分组介质接入时延,不适合时间敏感性强的无线传感器网络。The unique GTS mechanism in IEEE802.15.4 standard is simply described, the impacts of SO （Superframe Order）, data arrival rate and IFS on GTS mechanism performance are discussed, through various simulation experiments based on OPNET software under different network conditions. Simulation re- suits show that the maximum utilization of allocated GTS and minimal packet medium access delay are achieved in low SO value and SIFS for applications with high data arrival rate. However, it is not suitable for time-sensitive wireless sensor networks,for this mechanism could neither achieve the maximum utilization of allocated GTS, nor decrease the packet medium access delay for high SO value and LIFS.

关 键 词：吞吐量 带宽利用率 介质接入时延 GTS算法 IEEE802 15 d 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]