QoS Constrained Optimal Sink and Relay Placement in Planned Wireless Sensor Networks

Bhattacharya, Abhijit and Rao, Akhila and Naveen, KP and Nishanth, PP and Anand, SVR and Kumar, Anurag (2014) QoS Constrained Optimal Sink and Relay Placement in Planned Wireless Sensor Networks. In: International Conference on Signal Processing and Communications (SPCOM), JUL 22-25, 2014, Banaglore, INDIA.

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Abstract

We are given a set of sensors at given locations, a set of potential locations for placing base stations (BSs, or sinks), and another set of potential locations for placing wireless relay nodes. There is a cost for placing a BS and a cost for placing a relay. The problem we consider is to select a set of BS locations, a set of relay locations, and an association of sensor nodes with the selected BS locations, so that the number of hops in the path from each sensor to its BS is bounded by h(max), and among all such feasible networks, the cost of the selected network is the minimum. The hop count bound suffices to ensure a certain probability of the data being delivered to the BS within a given maximum delay under a light traffic model. We observe that the problem is NP-Hard, and is hard to even approximate within a constant factor. For this problem, we propose a polynomial time approximation algorithm (SmartSelect) based on a relay placement algorithm proposed in our earlier work, along with a modification of the greedy algorithm for weighted set cover. We have analyzed the worst case approximation guarantee for this algorithm. We have also proposed a polynomial time heuristic to improve upon the solution provided by SmartSelect. Our numerical results demonstrate that the algorithms provide good quality solutions using very little computation time in various randomly generated network scenarios.

Item Type:	Conference Proceedings
Publisher:	IEEE
Additional Information:	Copy right for this article belongs to the IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Keywords:	Wireless sensor network design; Multiple sink and relay placement; QoS-aware network design
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	30 Dec 2015 06:07
Last Modified:	30 Dec 2015 06:07
URI:	http://eprints.iisc.ac.in/id/eprint/52971

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