coveragecontrol in high dense wireless sensor network is an important way to make the network more efficient, which can schedule the sensors in active or sleeping state at the right time on the precondition of mainta...
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ISBN:
(纸本)9781509021550
coveragecontrol in high dense wireless sensor network is an important way to make the network more efficient, which can schedule the sensors in active or sleeping state at the right time on the precondition of maintaining the network coverage. Aiming to make the best of redundant coverage of the high dense network, an area controlprotocol based on probabilistic coverage model is designed. To simplify the area coverage judgment, the area coverage problem is transformed into the several points coverage judgment, an area judging rule is presented base on the previous work. And then, using the promoted judging rule, a node self-schedule scheme is designed, which can turn the sensor into active state or sleep according to the information received from its active neighbors. Comparing with other coverage control protocol, our promoted protocol can maintain the network coverage quality and prolong the network lifetime more efficiently.
The covering problem and node deployment is a fundamental problem in the research into wireless sensor networks. The number of nodes and the coverage of a network can directly affect performance and operating costs. F...
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The covering problem and node deployment is a fundamental problem in the research into wireless sensor networks. The number of nodes and the coverage of a network can directly affect performance and operating costs. For this reason, we propose Event-driven-mechanism coverage control protocol (ECCP). The algorithm uses the correlation between the nodes and dynamic grouping to adjust the coverage area. Within the coverage area, we use the greedy algorithm to optimize the coverage area. So the target node is uniformly covered by other sensor nodes and the network resource is optimized. To ensure the energy balance in the wireless sensor network and extend its lifetime, we only wake partial nodes to work in a cycle, so that they can work in turn. Experiments show that the algorithm can effectively reduce energy consumption, with better adaptability and effectiveness.
In a randomly deployed and large scale wireless sensor network, coverage-redundant nodes consume much unnecessary energy. As a result, turning off these redundant nodes can prolong the network lifetime, while maintain...
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In a randomly deployed and large scale wireless sensor network, coverage-redundant nodes consume much unnecessary energy. As a result, turning off these redundant nodes can prolong the network lifetime, while maintaining the degree of sensing coverage with a limited number of on-duty nodes. None of the off-duty eligibility rules in the literature, however, are sufficient and necessary conditions for eligible nodes. Hence redundancy or blind points might be incurred. In this paper we propose a complete Eligibility Rule based on Perimeter coverage (ERPC) for a node to determine its eligibility for sleeping. ERPC has a computational complexity of O(N(2)log(N)), lower than the eligibility rule in the coverage control protocol (CCP), O(N-3), where N is the number of neighboring nodes. We then present a coverage Preserving protocol (CPP) to schedule the work state of eligible nodes. The main advantage of CPP over the Ottawa protocol lies in its ability to configure the network to any specific coverage degree, while the Ottawa protocol does not support different coverage configuration. Moreover, as a localized protocol, CPP has better adaptability to dynamic topologies than centralized protocols. Simulation results indicate that CPP can preserve network coverage with fewer active nodes than the Ottawa protocol. In addition, CPP is capable of identifying all the eligible nodes exactly while the CCP protocol might result in blind points due to error decisions. Quantitative analysis and experiments demonstrate that CPP can extend the network lifetime significantly while maintaining a given coverage degree.
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