北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2007, Vol. 30 ›› Issue (6): 56-59.doi: 10.13190/jbupt.200706.56.018

• 论文 • 上一篇    下一篇

WiMAX实时业务下的自适应带宽申请机制


徐雅静,李智涛,钟秀芳,徐惠民   

  1. (北京邮电大学 电信工程学院, 北京 100876 )
  • 收稿日期:2007-03-05 修回日期:2007-03-30 出版日期:2007-12-31 发布日期:2007-12-31
  • 通讯作者: 徐雅静

An Adaptive Bandwidth Request Mechanism for Real-Time Traffic in WiMAX

XU Ya-jing, LI Zhi-tao, ZHONG Xiu-fang, XU Hui-min   

  1. (School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China)
  • Received:2007-03-05 Revised:2007-03-30 Online:2007-12-31 Published:2007-12-31
  • Contact: Ya-Jing XU

摘要:

针对全微波存取全球互通(WiMAX)系统的实时业务提出了一种新的基于流量预测的自适应带宽申请机制。该算法依据系统的历史流量数据将指数平均预测和平均累计误差结合起来,对下一时刻到达W系统的数据流量进行估计,在数据流到达之前预先申请额外的带宽资源用于服务该数据流,从而减少实时业务流的时延滞后,并减轻数据流对缓冲的压力。仿真结果显示,自适应带宽请求机制能显著改善实时业务的时延特性和减小缓冲需求。

关键词: 自适应算法, 全微波存取全球互通, 服务质量, 实时业务

Abstract:

Based on traffic prediction, a new adaptive bandwidth request mechanism for real-time traffic in worldwide interoperability for microwave access (WiMAX) is proposed. According to historical traffic of system, this algorithm combines exponential estimation with cumulative mean errors; therefore it can estimate the arrival of packets next time and request extra bandwidth for them in advance. Hence it can decrease time lags and reduce buffer for real-time traffic. Simulation results show that the proposed adaptive algorithm can provide better performance of average delay and buffer

Key words: adaptive algorithm, worldwide interoperability for microwave access, quality of service, real-time

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