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Wang Lei
Nanjing University of Science and Technology

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NCStorage: A Prototype of Network Coding-based Distributed Storage System Wang Lei; Yang Yuwang; Zhao Wei; Lu Wei
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 12: December 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Recent studies have shown that network coding can improve the performance of the distributed storage systems. However, most of these studies are theoretical which mainly focus on the bandwidth efficiency. This paper aims to provide a practical system, so NCStorage, a network-coding-based distributed storage system, is implemented. NCStorage implements network coding on the Internet, so users from all over the world can access it. Unlike traditional technologies such as erasure coding and fountain coding, re-encoding operation at storage servers is required by NCStorage. We observe that, benefiting from the re-encoding at the storage servers, the required repair bandwidth employed to repair a failed storage server is reduced, the computation overhead is balanced, and the security is enhanced. Both the encoding at the clients and the re-encoding at the storage servers are based on a deterministic algorithm. Finally, we deploy 8 storage servers in different places to evaluate the performance of the NCStorage, and the experimental results validate the analysis results.  DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3709 
Network Coding Based Reliable Multi-path Routing in Wireless Sensor Network Zhao Wei; Tang Zhenmin; Yang Yuwang; Wang Lei
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 12: December 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

This thesis proposes a network coding based and easily-realizable composite network topologic model. It is composed of disjoint multi-path routing (DMR) and braided multi-path routing (BMR) in wireless sensor network, and network coding technology is also employed in our multi-path routing. With the use of the Node Coding technology and the multi-path technology, NC-RMR (Network Coding based Reliable disjoint and braided Multipath Routing) strengthens the network reliability, and meanwhile reduces the number of desired sub paths and helps to balance the network loads. Finally, its theoretic correctness and performance superiority was verified in the simulation. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3711
Co-Authors Lu Wei Tang Zhenmin Yang Yuwang Zhao Wei