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In order to solve the poor performance of location in RSSI localization Algorithm, caused by the link between anchor nodes and node to be positioning, this paper presents a positioning algorithm, which chooses anchor nodes based on Link quality Select strategy (LS) in a wireless sensor network. The method combines LS which plays a key role in localization with Weighted Centroid Localization Algorithm...
High-precision and low-cost localization constitute the complex node localization requirements for wireless sensor networks. We present an adaptive localization structure selection method based on node density and two combined localization algorithms to satisfy these requirements. Experiments show that the localization accuracy of the two combined localization algorithms is greater than that of individual...
CDHL algorithm is a new hybrid range-free localization algorithm, which combines the Centroid and DV-Hop algorithms. The basic theory of the algorithm was introduced in this paper, and the average localization error rate of this hybrid algorithm is discussed and the algorithm energy consumption is analyzed. Simulation experiments show that the proposed algorithm is effective on different network situations,...
Considering the high packet losses and low, varying bandwidth of GPRS/EDGE network and limited computation power of handheld devices, we present and implement a novel SVC video-on-demand system for hand-held devices over GPRS/EDGE network. For the purpose of handling varying bitrate, we propose a priority based layer switching (PLS) adaptation scheme for SVC stream, which not only performs online...
This paper presents a distributed fermat-point range estimation strategy, which is important in the moving sensor localization applications. The fermat-point is defined as a point which minimizes the sum of distances from three sensors inside a triangle. This point is indeed at the trianglepsilas center of gravity. We solve the problems of large errors and poor performance in the bounding box algorithm...
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