| 双忙音多址接入-Ad Hoc网络中的多址接入控制机制的研究 |
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| 引用本文： | 赵阳,李建东,孙晓艳. 双忙音多址接入-Ad Hoc网络中的多址接入控制机制的研究[J]. 现代电子技术, 2003, 26(23): 48-51 |
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| 作者姓名： | 赵阳 李建东 孙晓艳 |
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| 作者单位： | 西安电子科技大学,信息科学研究所,陕西,西安,710071 |
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| 摘 要： | 在Ad Hoc网络中,隐藏终端和暴露终端的存在,严重影响了网络的通信能力。但是通常只采用RTS／CTS对话的MAC层机制不能完全解决隐藏终端和暴露终端的影响,正如单纯的分组侦听的MAC机制在全连通的网络中并不安全一样。为了解决这些问题,介绍一种新的MAC层协议——双忙音多址接入(DBTMA)机制。他的运行借助2个窄带带外忙音。通过使用RTS分组和接收端的接收忙音完全解决了隐藏终端的影响,接收端的CTS分组和接收忙音解决了暴露终端的影响。发送端建立的忙音保护了RTS分组,提高了接收RTS成功的概率,因此也就提高了吞吐量。
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| 关 键 词： | DBTMA CSMA RTS CTS |
| 文章编号： | 1004-373X(2003)23-048-03 |
| 修稿时间： | 2003-08-07 |
Research of Multi-access Control Scheme of Ad Hoc Network |
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| ZHAO Yang,LI Jiandong,SUN Xiaoyan. Research of Multi-access Control Scheme of Ad Hoc Network[J]. Modern Electronic Technique, 2003, 26(23): 48-51 |
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| Authors: | ZHAO Yang LI Jiandong SUN Xiaoyan |
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| Abstract: | In Ad Hoc networks, the hidden and exposedterminals can severely reduce the network capacity on the MAC layer To address these problems, RTS/CTS dialogue has been proposed However, MAC schemes using only the RTS/CTS dialogue can not completely solve the hidden terminal and exposed terminal problems, as "pure packet sensing" MAC schemes are not safe even in full connected network In order to solve these problems, we introduce a new MAC protocoldual busy tone multiple access (DBTMA )sheme The operation of DBTMA is based on two narrowbandwith, outofband busy tones With the RTS packet and receive busy tone which is set up by the receiver, this protocol completely solve the effect of hidden terminal The busy ton set up by the sender protect the RTS packet, thus improve the probability of successfull RTS reception and improve the throughput |
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| Keywords: | DBTMA CSMA RTS CTS |
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