| TFRC在认知无线电环境中的性能分析及改进 |
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| 引用本文： | 彭光超,刘延伟,胡亚辉,唐晖.TFRC在认知无线电环境中的性能分析及改进[J].微计算机应用,2011,32(6). |
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| 作者姓名： | 彭光超 刘延伟 胡亚辉 唐晖 |
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| 作者单位： | 中国科学院声学研究所高性能网络实验室,北京,100190 |
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| 摘 要： | TCP友好速率控制协议(TCP Friendly Rate Control,TFRC)能够有效支持多媒体传输,而其在认知无线电环境中少有研究.本文通过在认知无线电环境中对TFRC进行仿真,考察了①感知周期,②主用户干扰,③信道异构性三个因素对TFRC性能的影响,进而提出了一种反馈机制改善TFRC对频谱切换前后信道容量变化适应的能力.实验结果表明TFRC性能与信道检测时长和主用户行为有着密切关系,提出的改进方法可以有效的提高TFRC在认知无线电环境中的性能.
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| 关 键 词： | 认知无线电 TCP友好速率控制协议 性能分析 异构信道 |
Performance Analysis and Improvement of TFRC in Cognitive Radio Environment |
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| PENG Guangchao,LIU Yanwei,HU Yahui,TANG Hui.Performance Analysis and Improvement of TFRC in Cognitive Radio Environment[J].Microcomputer Applications,2011,32(6). |
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| Authors: | PENG Guangchao LIU Yanwei HU Yahui TANG Hui |
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| Affiliation: | PENG Guangchao,LIU Yanwei,HU Yahui,TANG HuiHigh Performance Network Laboratory,Institute of Acoustics,Chinese Academy of Science,Beijing,100190,China |
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| Abstract: | TCP Friendly Rate Control(TFRC) is one of the transport protocols which can deliver the multi-media efficiently.However,TFRC obtains little attention in cognitive radio environment.In this paper,TFRC is simulated with cognitive radio channels,by considering the impact of three factors: i) spectrum sensing interval,ii) primary users' activity,and iii) channel heterogeneity,and then a feedback way is proposed to improve the performance of TFRC for heterogeneous channel after spectrum handoff.The simulation re... |
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| Keywords: | cognitive radio TFRC performance analysis heterogeneous channel |
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