| 喷泉码在多播传输机制中的应用 |
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| 引用本文： | 刘德康,尹鹏,张序琦,卢继华. 喷泉码在多播传输机制中的应用[J]. 现代电信科技, 2012, 0(8): 59-62,66 |
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| 作者姓名： | 刘德康 尹鹏 张序琦 卢继华 |
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| 作者单位： | 1. 北京理工大学信息与电子学院
2. 北京理工大学通信技术研究所 |
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| 摘 要： | 首先研究了数字喷泉码优异的前向纠错特性;其次,在IEEE802.16e标准基础上引入了多播广播服务(MBS)小区的概念,给出了MBS小区规划算法;接着,对多种度分布的数字喷泉码应用在多播传输机制中进行仿真和分析,最后得出结论。仿真结果表明,在每包2 000比特、开销20%时,采用Raptor度分布的数字喷泉编码能够保证误码率在0.1%以下,可实现高效率高可靠性的数据传输。多播传输机制中使用数字喷泉码,能够提高接收效率,适应时变信道与异质用户,并实现异步和断续接收。
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| 关 键 词： | 数字喷泉码 多播传输机制 IEEE802.16e 误码率 |
The Application of Digital Fountain Code in Multicast Transmission Mechanism |
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| Affiliation: | Liu Dekang Yin Peng Zhang Xuqi |
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| Abstract: | The excellent forward error correction features of digital fountain code is studied first. Sec-ondly, the concept of the MBS service cell in IEEE802.16e standard, and the MBS district plan-ning algorithm are introduced. The performance of various digital fountain codes of different degree distribution used in multicast transmission mecha-nism are simulated and analyzed. The simulation results show that at the overhead of 20% （2000 bits per packet）, the degree distribution of Raptor Fountain codes can achieve the symbol error rate below 0.1%, achieve high efficient and high reliable data transmission. |
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| Keywords: | Digital fountain codes Multicasttransmission mechanism IEEESO2.16e Symbol er-ror rate |
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