一种基于捕获的扩频分组无线网MAC层协议及其性能分析  

A capture based spread spectrum packet wireless networks MAC protocol and its performance analysis

作　　者：郭凯[1] 卫国[1] 朱近康[1] 

机构地区：[1]中国科学技术大学电子工程与信息科学系

出　　处：《通信学报》2003年第8期155-160,共6页Journal on Communications

基　　金：国家"863"计划基金资助项目(2001AA123011)

摘　　要：在分组接入过程中,当每个用户终端以随机竞争的方式获得所需的频谱资源时,会引起用户间的冲突和资源的浪费,造成系统性能的降低。本文引入了一种基于捕获的接入方法,当一个时隙中存在多个干扰分组时,该方法仍有捕获到某个分组的可能,该方法在系统高负载的情况下能有效地利用资源。性能分析和计算结果表明,基于捕获的方法改善了系统的性能。In the process of packet access,the demanded spectrum resources are available in the manner of random contention by each user,which could bring collision among users and waste of resources,also cause reduction of system performance. In this paper,a capture based method is proposed,when there are multi-packet in a slot,this method still has probability of capturing a certain packet,which can utilize resources effectively in high traffic load. Performance analysis and numerical results show that the capture based method improved system performance.

关 键 词：分组无线网 S-ALOHA 捕获概率 吞吐量 延迟 

分 类 号：TN919.28[电子电信—通信与信息系统]