Hybrid area exploration–based mobility‐assisted localization with sectored antenna in wireless sensor networks

Abstract

In common practice, sensor nodes are randomly deployed in wireless sensor network (WSN); hence, location information of sensor node is crucial in WSN applications. Localization of sensor nodes performed using a fast area exploration mechanism facilitates precise location-based sensing and communication. In the proposed localization scheme, the mobile anchor (MA) nodes integrated with localization and directional antenna modules are employed to assist in localizing the static nodes. The use of directional antennas evades trilateration or multilateration techniques for localizing static nodes thereby resulting in lower communication and computational overhead. To facilitate faster area coverage, in this paper, we propose a hybrid of max-gain and cost-utility-based frontier (HMF) area exploration method for MA node's mobility. The simulations for the proposed HMF area exploration-based localization scheme are carried out in the Cooja simulator. The paper also proposes additional enhancements to the Cooja simulator to provide directional and sectored antenna support. This additional support allows the user with the flexibility to feed radiation pattern of any antenna obtained either from simulated data of the antenna design simulator, ie, high frequency structure simulator (HFSS) or measured data of the vector network analyzer (VNA). The simulation results show that the proposed localization scheme exhibits minimal delay, energy consumption, and communication overhead compared with other area exploration-based localization schemes. The proof of concept for the proposed localization scheme is implemented using Berkeley motes and customized MA nodes mounted with indigenously designed radio frequency (RF) switch feed network and sectored antenna.KEYWORDS area exploration, directional antennas, localization, mobile anchor node, wireless sensor networks INTRODUCTIONThe wireless sensor network (WSN) is a collection of sensor nodes that perform different functionalities such as sensing, processing, and transmitting the data to the base station via multiple hops. WSN faces several challenges such as deployment, localization, and connectivity. The deployment strategy in WSN is classified as structured deployment and Int J Commun Syst. 2020;33:e4220.wileyonlinelibrary.com/journal/dac

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“…However, there are still gaps that need to be addressed to solve the problem of localization in the mobility constrained domain of IoBT. In WSN, some of the localization approaches consider the mobile sink nodes that roam in the area of interest to localize remaining static blind nodes 21‐24 . This mobile sink‐node‐assisted localization is unable to serve IoBT where none of the participant nodes can remain stationary.…”

“…In WSN, some of the localization approaches consider the mobile sink nodes that roam in the area of interest to localize remaining static blind nodes. [21][22][23][24] This mobile sink-node-assisted localization is unable to serve IoBT where none of the participant nodes can remain stationary. In addition to this, the literature also reports work in the area of mobile wireless sensor networks (MWSN), where every sensor node may contribute to change in the network topology.…”