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无线城域网中中心调度的竞争解决方案
引用本文:陆文彦,贾维嘉,王国军,杜文峰.无线城域网中中心调度的竞争解决方案[J].通信学报,2006,27(12):83-91.
作者姓名:陆文彦  贾维嘉  王国军  杜文峰
作者单位:1. 中南大学,信息科学与工程学院,湖南,长沙,410083;香港城市大学,计算机科学系,香港,九龙
2. 中南大学,信息科学与工程学院,湖南,长沙,410083
基金项目:国家自然科学基金;香港研究资助局资助项目;国家重点基础研究发展计划(973计划)
摘    要:针对无线城域网PMP模式下的竞争问题,提出了一种中心调度的竞争解决方案CSCR(centralized scheduling contention resolution)。通过对每一时间帧内活动用户站(subscriber stations)数目的预测,基站(basestation)给所有用户站提供了一个优化的竞争窗口,所有用户站都采用该窗口独立地参与竞争。理论分析和模拟结果表明,与IEEE802.16推荐的基于二进制指数回退BEB(binary exponential backoff)算法的方案相比,CSCR方案不但易于实现,而且能更加有效地利用无线资源,同时减少请求接入延时。

关 键 词:中心调度  二进制指数回退  竞争  冲突
文章编号:1000-436X(2006)12-0083-09
收稿时间:2005-07-21
修稿时间:2005-07-212006-06-15

Centralized scheduling contention resolution for wireless metropolitan area networks
LU Wen-yan,JIA Wei-jia,WANG Guo-jun,DU Wen-feng.Centralized scheduling contention resolution for wireless metropolitan area networks[J].Journal on Communications,2006,27(12):83-91.
Authors:LU Wen-yan  JIA Wei-jia  WANG Guo-jun  DU Wen-feng
Abstract:A novel centralized scheduling contention resolution (CSCR) was presented for the contention problem in PMP model of wireless metropolitan area networks. In each time frame, by estimating the number of active subscriber stations (SSs), the base station (BS) provides an optimal window to all SSs. Each SS then individually participates with this win-dow in transmission. In comparison with the contention resolution based on truncated binary exponential backoff (BEB) algorithm given by IEEE 802.16, the CSCR resolution is not only easy to be implemented and more efficient in utilizing the transmission opportunities, but also can reduce the delay of admission. This was proved by our theoretical analysis and simulations.
Keywords:IEEE 802  16
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