非线性随机网络编码
Random Non-linear Network Coding
投稿时间:2017-10-10  修订日期:2017-10-10
DOI:
中文关键词: 网络编码  非线性  纠错
英文关键词: network coding  non-linear  error-correcting
基金项目:
作者单位E-mail
张东秋 南京师范大学 教育科学学院 307642064@qq.com 
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中文摘要:
      针对网络编码里的“全有或全无”以及线性网络编码纠错能力过低而导致重传代价过大的问题,提出了非线性随机网络编码的方法。用有限域上的非线性函数的系数代替线性网络编码里的线性函数系数,在中间节点用一般的非线性函数对上游消息进行复合函数操作,在信宿节点用查表法进行译码。实验结果表明非线性随机网络编码比线性网络编码具有更低的能量消耗,更低的时延,码的长度相同时能纠正更多的错误。
英文摘要:
      The error-correcting issue in the network coding is researched here. Because the error-correcting capacity of the linear network coding is limited, the concept of non-linear network coding is presented. A new concept of non-linearly independent is presented to replace the existing concept of linearly independent. When the received symbols are non-linearly dependent, there is a fair possibility to decode the original messages without receiving more symbols. This scheme is just to utilize the pre-existing dependent symbols reasonably to decode original messages, instead of re-transmitting new symbols. Moreover, network coding is performed over binary field to save computational overhead. The simulation results show that this scheme reduces much energy and has low delay.
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