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Localisation in wireless sensor network is the process of determining the geographical location of the sensor nodes. Conventional localization is space oriented which uses GPS (Global Positioning System) signal to obtain the location information of the nodes. But the GPS signals fail to work in indoor environments, the reason for which it becomes mandatory to opt for terrestrial localisation. The...
Based on the Bounded Delaunay Triangulation, Sink nodes' optimal mobile path was designed using Calculating Algorithm of Collecting Blind Area. And there movement is optimized by Hierarchical Clustering Algorithm. Sink nodes' movement is controlled in dominant regions to partially receive information from S nodes, which can reduce the expense of maintenance transmission path, and guarantee the reliability...
The energy content in a network mainly depends on the number of clusters and cluster heads. Hence the clustering procedure is very significant towards efficient network resource utilization. The transmission range and layout of the nodes play a very important role in any clustering methodologies. In this paper, a new clustering approach involving transmission range, location of a node in the network...
In wireless sensor networks, grid-based clustering and routing schemes have attracted considerable attention due to their simplicity and feasibility. In this paper, we adopt a hexagonal tessellation approach and propose a Fast Hexagonal Clustering (FHC) algorithm for efficient data collection. The traffic load is intentionally concentrated at a small portion of Cluster Heads (CHs) and Convergence...
This paper proposes an efficient data transmission strategy using adaptive-tier low transmission power schedule in a TDMA-based ad hoc MAC protocol. Since the network resource of ad hoc networks has the characteristic of reassignment due to the multiple interferences and the contention-based limited wireless channel, the efficient time slot assignment and low power transmission scheme are the main...
In a ad hoc sensor networks node mobility would make clustering very challenging since the node membership will dynamically change, forcing clusters to evolve over time. In this paper, a novel distributed clustering approach is proposed for a long-lived ad hoc sensor networks. This work presents a protocol that periodically selects cluster heads according to a hybrid of the node mobility and node...
In recent years, with advance in wireless communication technology, sensing technology, micro-electronics technology and embedded system, wireless sensor network (WSN) can be used for various application areas, such as home health care, military and industry. The localization service which provides the location information of mobile user is one of important service provided by WSN, because many applications...
The recent advances in radio and embedded system technologies have enabled the proliferation of wireless microsensor networks. Such wirelessly connected sensors are released in many diverse environments to perform various monitoring tasks. The effectiveness of these networks is determined to a large extent by the coverage provided by the sensor deployment. The positioning of sensors affect coverage,...
Implementation of synchronous algorithms in distributed systems in general is less troublesome than the implementation of asynchronous algorithms. Synchronizers provide synchronous execution of an asynchronous algorithm in distributed systems. In this study, we propose a gamma synchronizer for wireless sensor networks (WSNs). This synchronizer consists of alpha and beta synchronizers. In our work,...
Expected growth in use and implementation of wireless sensor networks (WSNs) in different environments and for different applications creates new security challenges. In WSNs, a malicious node may initiate incorrect path information, change the contents of data packets, and even hijack one or more genuine network nodes. As the network reliability completely depends on individual nodespsila presence...
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a hybrid-structure routing protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection...
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