摘要
网络编码是近几年来通信科学一个新兴的研究领域。结合图论及有限域运算的相关知识,简要阐述了网络编码的编解码原理、优点及其应用。针对分布式安全存储系统,结合LDPC码中稀疏矩阵与非规则矩阵等概念,讨论了随机线性网络编码的具体编码过程。通过编码优化,构造稀疏的校验矩阵,提高了编译码效率,降低了复杂度。最后,指明了网络编码在安全存储系统领域的优势和实际应用中的发展方向。
Recently network coding becomes a new research area in information theory. Based on the knowledge of graph theory and finite-field arithmetic,this paper briefs the principle,advantage and application of the network coding/ decoding. For the distributed secure storage system,and in combination with the concepts of sparse matrixes in LDPC and irregular matrixes etc. ,the concrete coding process of random linear network coding is discussed. In addition,the coding/ decoding efficiency is improved,and the complexity is reduced by optimizing the coding and constructing the sparse checking matrix. Finally,the advantages of network coding in secure storage system and the development direction in practical application are also given in this paper.
出处
《信息安全与通信保密》
2011年第6期80-82,共3页
Information Security and Communications Privacy
