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- W2036825442 abstract "Query scheduling as one of the most important technologies used in query processing has been widely studied recently. In this paper, we investigate the Minimum Latency Multi-Regional Query Scheduling ML-MRQS problem in wireless Sensor Networks WSNs, which aims to generate a scheduling plan with minimum latency under a more practical query model called Multi-Regional Query MRQ. An MRQ targets at interested data from multiple regions of a WSN, where each region is a subarea. Because the ML-MRQS problem is NP-hard, we propose a heuristic scheduling algorithm Multi-Regional Query Scheduling Algorithm MRQSA to solve this problem. Theoretical analysis shows that the latency of MRQSA is upper bounded by 23A+B+C for an MRQ with m query regions R1,R2,',Rm, where A=maxi=1mDileft is the maximum latency for non-overlapped regions, B=maxi=1m{23Di+5Δ+21ki} is the maximum latency for overlapped regions, and C=i¾?i=1mHi+5Δ-m+17 is the accumulated latency for data transmission from the accessing nodes to the sink. Simulation results show that MRQSA reduces latency by 42.7% to 51.63% with respect to different number of query regions, network density, region size, and interference/transmission range compared with C-DCQS, while guaranteeing energy efficiency. Copyright © 2012 John Wiley & Sons, Ltd." @default.
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- W2036825442 date "2012-05-31" @default.
- W2036825442 modified "2023-10-16" @default.
- W2036825442 title "Multi-regional query scheduling in wireless sensor networks with minimum latency" @default.
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- W2036825442 doi "https://doi.org/10.1002/wcm.2238" @default.
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