NDLI: Adaptive data collection scheme with dynamic grid-length adjustments in wireless sensor networks*.

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Adaptive data collection scheme with dynamic grid-length adjustments in wireless sensor networks*.

Content Provider	CiteSeerX
Author	Sheu, Tsang-Ling Liu, Wei-Chang
Abstract	In a wireless sensor network (WSN), a large number of sensor nodes have to collect and forward data hop-by-hop to a sink. This paper presents an adaptive data collection (ADC) scheme with dynamic grid-length adjustments for mobile sinks in a grid-based WSN. In the proposed ADC, a mobile sink collects data along the X- and Y-axis of the grid. Due to simultaneous collections of multiple mobile sinks, traffic distribution may become uneven and network congestion could occur. The proposed ADC can relieve the traffic by (1) adaptively adjusting transmission range between two primary grid nodes (PGN); one or more temporary grid nodes (TGN) are allocated between two PGN, and (2) dynamically changing the main data collection axis along with the moving direction of a sink. Through the inserted TGN and the changes of main collection axis, data pick up is more convenient and traffic distribution becomes more even. Additionally, less power is consumed in PGN for sustaining longer life, and since TGN provides extra buffer spaces for data forwarding, packet loss ratio is reduced. For the purpose of performance evalua-tion, we conduct simulation on NS-2. From the simulation results, we demonstrate that, with the proposed ADC, the overall power consumption and the packet loss ratio are sig-nificantly reduced. As a result, the overall throughput of the grid-based WSN is substan-tially improved.
File Format	PDF
Access Restriction	Open
Subject Keyword	Dynamic Grid-length Adjustment Wireless Sensor Network Adaptive Data Collection Scheme Grid-based Wsn Traffic Distribution Packet Loss Ratio Large Number Overall Power Consumption Data Hop-by-hop Temporary Grid Node Performance Evalua-tion Main Collection Axis Sensor Node Mobile Sink Collect Data Network Congestion Primary Grid Node Multiple Mobile Sink Transmission Range Simulation Result Data Forwarding Main Data Collection Mobile Sink Adaptive Data Collection Inserted Tgn Overall Throughput Simultaneous Collection Extra Buffer Space
Content Type	Text
Resource Type	Article

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