摘要
本文从现有的一些提高宽带无线接入系统性能的技术出发,分析了它们克服无线通信缺陷的一些解决思路,总结出要提高宽带无线接入系统性能的关键在于提高现有带宽的利用率和增加系统对无线信道误帧的容忍性。然后,有针对性地提出了采用上行带宽集中动态分配策略以提高带宽利用率,采用MR—ARQ机制和多速率重传策略以降低系统对SNR的要求的解决方案,从而提高系统容量。
In this paper, we begin with some existing technologies improving capability of BWA system, analyzing some resolvents of overcoming communication defects, and finally summarize that the key of improving the capacity of BWA system is to enhance the utilization ratio of existing bandwidth and the tolerance to the frame error of wireless channel. And then, we adopt the resolvents that centralized and dynamic allocation strategy in uplink to enhance the utilization ratio of bandwidth, and MR-ARQ and multi-rate retransmission strategy to enhance the tolerance to SNR.
出处
《计算机科学》
CSCD
北大核心
2007年第5期36-37,78,共3页
Computer Science
基金
国家自然科学基金资助项目(60496315)
国家863计划项目:国家863计划十五通信主题项目B3G课题资助(2003AA12331005)
