| 认知无线电网络双天线多信道MAC协议 |
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| 引用本文： | 黄巍,钱裕乐,李云.认知无线电网络双天线多信道MAC协议[J].计算机应用,2011,31(12):3177-3180. |
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| 作者姓名： | 黄巍 钱裕乐 李云 |
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| 作者单位： | 1. 重庆邮电大学 移动通信技术重点实验室，重庆400065
2. 总装备部重庆军事代表局驻成都地区军事代表室，成都 610036
3. 重庆邮电大学 移动通信技术重点实验室，重庆 400065 |
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| 基金项目： | 国家自然科学基金资助项目，重庆市科委自然科学基金资助项目，中国博士后科学基金资助项目，重庆市教委项目 |
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| 摘 要： | 在认知无线电网络中，媒体接入控制(MAC)协议的主要功能包括信道感知、选择和接入控制，其中感知时间和传输时间的长度对网络的性能有着重要的影响。在动态无线网络环境下，如何合理分配感知时间和传输时间是个挑战性问题。提出了一种双天线多信道分布式认知无线电MAC（TM-MAC）协议，不需要在传输之前对信道进行感知。节点可以在其它节点传输数据的同时对频谱资源进行检测，然后利用空闲的频谱资源通信。建立了数学模型分析在饱和网络状况下MAC协议的吞吐量。仿真分析表明TM-MAC协议能够有效提高网络的吞吐量。
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| 关 键 词： | 认知无线电网络 媒体接入控制协议 双天线 多信道 吞吐量 |
| 收稿时间： | 2011-06-30 |
| 修稿时间： | 2011-08-10 |
Dual-antenna multi-channel MAC protocol in cognitive radio networks |
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| HUANG Wei,QIAN Yu-le,LI Yun.Dual-antenna multi-channel MAC protocol in cognitive radio networks[J].journal of Computer Applications,2011,31(12):3177-3180. |
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| Authors: | HUANG Wei QIAN Yu-le LI Yun |
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| Affiliation: | 1. Key Laboratory of Mobile Communication Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
2. Military Representative Office in Chengdu Region,PLA General Armament Department,Chengdu Sichuan 610036, China |
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| Abstract: | In the cognitive radio networks, the main functions of MAC protocols include channel sensing, channel selection and access, the detection time and transmission time has the important influence on network performance. In dynamic wireless network environment, how to reasonably distribute detection time and transmission time is a challenge. A two radios multi-channel distributed MAC(TM-MAC) protocol are proposed, which is not necessary to detect channels before node transmit data. Node can detect the spectrum resource while other nodes transmit data. Then, the node can transmit data use the idle spectrum resource. A model is built to analyze the throughput of TM-MAC under the saturation condition. The analysis results show that TM-MAC improves the throughput in cognitive networks. |
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| Keywords: | cognitive radio networks MAC protocol two radios multi-channel throughput |
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