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Documents 基于广播优势的无线网络编码系统性能分析与应用研究
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  • Author Author: sophie0love
  • Date Created: 21 Nov 2010 2:33 AM Date Created
  • Last Updated Last Updated: 9 Nov 2021 4:50 PM
  • Views 328 views
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基于广播优势的无线网络编码系统性能分析与应用研究

随着移动通信和互联网的高速发展,无线多媒体业务需求的不断增长,人们对宽带无线接入的需求越来越迫切。人们期望,下一代(B3G/4G)移动通信系统能提供更高的数据速率,更大的系统容量支持更多的用户并且满足多种业务的不同服务质量(QoS)要求。故下一代移动通信系统需要应用更多先进的传输技术,以解决人们对带宽的需求和有限的无线资源之间的矛盾。其中网络编码(network coding)技术受到广泛关注。 网络编码理论是网络通信研究领域中的一项重要突破,通过允许中继节点进行数据包级的编码,而不再是简单的信号存储转发,来有效提高整个网络的传输效率、容量和健壮性。 一种新技术的出现,总是避免不了从简单应用到与其他现有技术相互结合设计的演进过程以获取更好的系统性能。网络编码也不例外。虽然网络编码的核心步骤在于编码操作,但其真正的性能优势体现在多用户的差异性上,相同的编码数据包被不同的用户接收,接收者根据存储数据包译出各自所需的信息,从而实现一次传输多个受益。而实现这一性能优势的物理条件在于广播或组播。因此论文从探讨无线网络编码的广播优势出发,综合考虑系统的可靠性和有效性,探讨了网络编码与无线通信系统各层关键技术相结合的有效方案,主要研究配置了网络编码模块系统的关键技术算法设计及性能分析等。 论文的主要工作包括:网络编码技术可以有效地提高或达到网络中系统容量。

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