For wireless sensor network applications that require location information for sensor nodes, locations of nodes can be estimated by a number of localization algorithms. However, precise location information may be unavailable due to the constraint in energy, computation, or terrain. An improved correction localization algorithm based on dynamic weighted centroid for wireless sensor networks was...

In this paper, an efficient neighbor AR (Access Router) discovery scheme and handoff procedure using neighbor information are proposed. It allows each AR and Mobility Anchor Point (MAP) to know neighboring ARs and MAPs, and therefore, a mobile node (MN) can perform the handoff process in advance, using the proposed handoff mechanism. It is important to note that the Inter-MAP domain handoff imp...

This paper presents a telemetry system used in a combined trilateration method for the precise indoor localization of the elderly who need health monitoring. The system is based on the association of two wireless technologies: ultrasonic and 802.15.4. The use of the 802.15.4 RF signal gives the reference starting time of the ultrasonic emission (time difference of arrival method). A time of fli...

Please cite this article in press as: J. Baek et al., O doi:10.1016/j.comcom.2010.03.030 In a large-scale mobile IPv6 network, usually there are several coexisting mobility anchor points (MAPs) for networking robustness and traffic sharing. Therefore, it is a challenging issue for an arriving mobile node to choose the most appropriate MAP to bind. This task must be carried out by considering th...

Localization in wireless sensor networks has been a big challenge for researchers in the past years. Besides physical problems like estimating the distance between two nodes, applicable algorithms are still on the list of open research issues. While single-hop localization with direct connection to fixed anchors is well researched, the localization with fixed anchors over a multihop route is st...

1 Path Planning Algorithm for Mobile AnchorBased Localization in Wireless Sensor Networks Localization is an essential issue in wireless sensor networks because many applications require thesensor nodes to know their locations with a high degree of precision. Various localization methodsbased on mobile anchor nodes have been proposed for assisting the sensor nodes to determine their locations. ...

The efficiency of sensor localization is a key issue in the Internet of things. There are possibilities for improvements in existing sensor localization systems, such as design complexity, cost. To address these issues, a location algorithm based on Distributed Range-Free Localization (DRFL) is proposed. In our positioning system can be composed by some single species node which can send and re...

In allusion to the special environment of coal mine roadways, the strategy laying anchor nodes evenly on the left and right sides and the top of roadways in accordance with the oblique triangle and the mine personnel positioning algorithm based on received and transmitted signal strength of nodes were adopted in the paper. The algorithm estimating the distance between an unknown node and an anc...

In wireless sensor networks (WSN) research area, node localization is one of the most important techniques. An improved Centroid localization algorithm is analyzed and an improved Centroid algorithm with selective anchor node localization algorithm (CSA) for WSN will proposed in this paper. The key point of the algorithm is the most discrepant estimation nodes are selected by the nearest refere...

Sequence-based schemes determine beacon sequence to help sensor node localization. Due to the ambiguity of RSS over distance, sequence-based scheme may have RSS-inconsistency problem, i.e., no location in the localization space could match the beacon sequence. Besides, determining the matched location is costly. In this paper, we introduce a RSS-inconsistency avoidance localization scheme, whic...