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Node in WSN has its own local clock, and it's difficult to achieve long-term time synchronization between nodes due to some internal and external factors. Within the factors, a special one is Byzantine general problem which will be discussed in this article. Considering the special circumstance that some nodes of the wireless sensor network have the same clock, an improved HRTS algorithm which based...
Channel assignment is the key problem in the research of the multi-radio multi-channel wireless mesh networks (WMN). In this paper we propose a new loop-based mechanism for dynamic distributed Channel Assignment (DCA) in WMN. The group which we called Grid-loop is constructed on distributed Minimum Spanning Tree by self-organized. Our new DCA mechanism has many advantages over cluster-based. The analysis...
Clustering data stream is a challenging work due to the limited memories and a single pass. In this paper, a new grid based algorithm for clustering high-dimensional data stream (called GHStream) is proposed, which adopts a two-phase clustering formwork. In the online component, a High-dimensional Dense Grid Tree (abbreviated HDG-Tree) is presented to summarize streaming data. As data streams evolve,...
Communication via self-organization is a practical and most common model for wireless sensor network. Its security, efficiency and cost and corresponding key management are one of the key research topics on WSN security. This paper proposes a group key management scheme for WSN based on an original self-organized structure, grid-loop. The group which we called grid-loop is constructed on distributed...
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