Wireless communication between sensors allows the formation of flexible sensor networks,
which can be deployed rapidly over wide or inaccessible areas. However, the need to …

Charger placement is an important problem in improving the quality of service in wireless
rechargeable sensor networks. This paper studies the problem of W ireless Ch A rger …

For any angle α< 2 π, we show that any connected communication graph that is induced by
a set P of n transceivers using omni-directional antennas of radius 1, can be replaced by a …

Given a set S of n sensors in the plane we consider the problem of establishing an ad hoc
network from these sensors using directional antennae. We prove that for each given integer …

Let S be a set of points in the plane, such that the unit disk graph with vertex set S is
connected. We address the problem of finding orientations and a minimum radius for …

Connectivity in wireless sensor networks may be established using either omnidirectional or
directional antennae. The former radiate power uniformly in all directions while the latter …

Consider a set S of nodes in the plane such that the unit-disk graph G (S) spanning all
nodes is connected. Each node in S is equipped with a directional antenna with beam-width …

This paper concerns wireless sensor networks (WSNs) of which each node is equipped with
k≥ 1 directional antennas having beam-width θ∈(0, 2π). The sum φ k of the beam-widths of …

Traditional approaches to connectivity in sensor networks are based on the omnidirectional
antenna model which relies on the assumption that the sensors send and receive in all …

In this paper, we study the Antenna Orientation (AO) problem concerning symmetric
connectivity in Directional Wireless Sensor Networks. We are given a set of nodes each of …