文档介绍：
基于 Raptor 码的无线传感器网络数据分布
存储
郭峰,刁鸣**
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(哈尔滨工程大学信息与通信工程学院,哈尔滨 150001)
摘要:在无线传感器网络中,经常出现节点失效等意外情况。如何实现数据的分布式存储是
无线传感器研究的重点。根据以包为中心编码的相关研究,提出了一种基于 Raptor 码的无
线传感器分布式数据存储方案。Raptor 码是喷泉码的一种,是一种在删除信道上有效的低复
杂度的编码。通过预编码形成虚拟节点,使校验包更多的参与 LT 编码,提高了编码的随机
性。实验证明在有噪声条件下,具有优于分布式 LT 码的性能。
关键词:Raptor 码;无线信道;传感器网络;数据存储;虚拟节点
中图分类号:请查阅《中国图书馆分类法》
Wireless work data distributed storage based on
Raptor code
guofneg, diaoming
(College of information munication Engineering,Harbin Engineering University,Harbin
150001)
Abstract: In wireless works, node failure accidents often occur. How to realize the
distributed data storage is the key of wireless sensor. According to the related node-centric
proposals, this paper proposes a novel wireless works (WSN) distributed data storage
scheme based on Raptor codes. Raptor code is an effective, plexity coding scheme over
erasure channels, which is a kind of fountain codes. The formation of virtual nodes, in this paper,
by using the pre-coding to form the Virtual nodes, the parity packets more involved in LT coding,
which improves the random of coding. The experiment proved that in noisy condition, this scheme
has better performance than LT codes.
Key words: Raptor code; Wireless channel; work;Data storage;Virtual node
0 引言
无线传感器网络(WSN)[1]是一种建立在特定区域的自组织 Ad-hoc 网络,广泛应用于
军事、工业、交通、环保等领域[2]。但无线传感器网络节点计算能力和能量十分有限