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LEACH (Low Energy Adaptive Clustering Hierarchy) is a clustering-based protocol that utilizes randomized rotation of the cluster-heads to evenly distribute the energy load among the sensor nodes in the network. This classical protocol has been widely used in wireless sensor network (WSN). However, it has the disadvantage of irrationality of electing(More)
Wireless sensor networks (WSNs) currently operate in the unlicensed industrial, scientific and medical (ISM) spectrum band. However, more and more wireless equipments make this band overcrowded. The tremendous growth in the applications of WSNs has posed great challenges for the precious radio electromagnetic spectrum resource. The limited wireless spectrum(More)
Wireless Sensor Networks are made up of restricted energy driven resources. When the installation setup of sensor nodes are over usually they are inaccessible to the user. Hence the replacement of battery source is not feasible. In order to boost the life span of the network, the key design issue is to be enhanced which is energy efficiency. With the(More)
This paper presents a kind of survivability evaluation technique for Tactical Data Link Network (TDLN). In our work, a distributed evaluation system via High Level Architecture (HLA) is provided to evaluate the TDLN on-line, and a novel quantitative evaluation method based on the principle of maximum deviation and subjective estimation is proposed to(More)
—The network routing could be simplified by clustering algorithm in wireless sensor network (WSN). Aimed at the occasion with a large amount of nodes but without whole-network time synchronization mechanism, a self-adaptive clustering algorithm for network topology control is proposed. In this algorithm, the cluster structure can be adjusted automatically(More)
This paper presents a kind of GA_based image watermarking algorithm. Considering two conflicting objectives: robustness and invisibility in watermarking system, it is always difficult to satisfy them at same time. We resolve this problem via genetic algorithm (GA). With a proper fitness function in the watermarking system, GA search for the optimal(More)
Wireless sensor network consists of sensor nodes which are powered by battery; to communicate with each other for environment monitoring. Energy efficiency is the main issue in wireless sensor networks. Therefore, to maximize network lifetime and achieve maximum reliability and scalability, routing techniques have been developed. LEACH is the conventional(More)
With the rapid development of multimedia technology and computer network technology, and the popularization of the Internet, digital media has gradually become the primary means of information exchange, such as images, audio, video. People can easily get a variety of digital information from the Internet. Because digital information can easily be illegally(More)
—A kind of performance evaluation for communication network is presented. In our work, a distributed evaluation system via High Level Architecture (HLA) and a novel quantitative evaluation method are proposed to evaluate communication network on-line. During the weight determination process, a combinative method based on the principle of maximum deviation(More)
Collaborative simulation is proposed as a technique to support design evaluation with higher fidelity by addressing the interacting phenomena during the development of complex system. To facilitate the collaborative simulation, the High Level Architecture (HLA) was proposed and evolved as a standard with its interface specification, object model template(More)