一种基于子载波侦听的宽带无线网络接入控制策略

发布时间：2018-01-07 11:07

本文关键词：一种基于子载波侦听的宽带无线网络接入控制策略　出处：《电子学报》2014年06期 　论文类型：期刊论文

【摘要】：在基于正交频分多址技术的宽带网络中,通过把竞争分散到多个子信道能有效改善随机接入的性能.然而多信道特性也会使传统基于Request-To-Send(RTS)控制帧的随机接入协议面临子信道空闲、RTS传输时间延长、上行复杂的问题.针对这些问题,在本文所提出的接入方法中,用户在没有被分配到资源时通过在随机子载波上发送信号来请求传输机会,与此同时,接入点对这些信号侦听,并根据子载波忙闲状态确定哪些用户可以接入.理论分析及仿真结果表明,相比传统依靠RTS的接入方法,采用子载波侦听,系统将获得更高的吞吐量.
[Abstract]:In the broadband network based on orthogonal frequency division multiple access technology, through the competition dispersed into a plurality of sub channels can effectively improve the performance of the random access channel. However many characteristics can make the traditional Request-To-Send based random access protocol (RTS) control frame facing sub channel is idle, the RTS transmission time for uplink complex problems. These problems, in our scheme, the user through the random sub carrier sends a signal to the transmission request the opportunity, without being assigned to resources at the same time, the access point of the signal interception, and busy to determine which user can access the idle state according to the sub carrier. Theoretical analysis and simulation results show that compared to rely on the traditional RTS access method, using sub carrier sensing system will get higher throughput.

【作者单位】：电子科技大学通信与信息工程学院光纤传感与通信教育部重点实验室;
【基金】：国家科技重大专项(No.2013ZX03001023) 国家863高技术研究发展计划重点项目(No.2012AA011402) 新世纪优秀人才支持计划
【分类号】：TN92
【正文快照】： 1引言近年来,不少研究试图利用正交频分多址(Orthogo-nal Frequency Division Multiple Access,OFDMA)技术的多信道特点来改善传统随机接入的性能,例如Yong-June Choi等[1]提出的OFDMA Aloha以及Hojoong Kwon等[2~5]提出的OFDMA载波侦听多路访问(Carrier Sens-ing Multiple Ac

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