基于Raptor码的无线传感器网络数据分布存储
首发时间:2014-01-20
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
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Wireless sensor network data distributed storage based on Raptor code
Abstract:In wireless sensor networks, 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 sensor networks (WSN) distributed data storage scheme based on Raptor codes. Raptor code is an effective, low complexity 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.
Keywords: Raptor code Wireless channel Sonser network Data storage Virtual node
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