A major concern in wireless sensor network (WSN) is how to maximize the network lifetime
while maintaining the coverage requirement. Since the energy of sensor node is limited, the …

Unbalanced energy consumption of sensor nodes in wireless sensor network (WSN) leads
to the formation of hotspots that can shorten network lifetime. Based on the study of hybrid …

In recent years, the directional sensor networks have been attractive to researchers due to
their wide and different applications. These networks normally contain a number of self …

In this paper we face the problem of maximizing the amount of time over which a set of target
points, located in a given geographic region, can be monitored by means of a wireless …

Wireless sensor networks are generally composed of a large number of hardware devices of
the same type, deployed over a region of interest in order to perform a monitoring activity on …

This paper provides a general framework to model and optimize lifetime maximization
problems in wireless sensor networks with sensors having specialized capabilities like the …

This paper analyzes scheduling in a data gathering network with data compression. The
nodes of the network collect some data and pass them to a single base station. Each node …

We provide an introduction to Lagrangian relaxation, a methodology which consists in
moving into the objective function, by means of appropriate multipliers, certain complicating …

We consider a communication scheduling problem to address data compression and data
communication together, arising from the data gathering wireless sensor networks with data …

Conventional researches on target coverage in directional sensor networks (DSNs) mainly
focus to increase the network lifetime, overlooking the coverage quality of targets, especially …