In this paper we have investigated the design of a multi-tier architecture for sensor networks
that includes higher-powered relay nodes, and a mobile data collector (MDC). We have …

Hierarchical sensor networks that use higher-powered relay nodes as cluster heads have
gained popularity in recent years. An important design problem in such networks is to …

Using mobile elements as mechanical carriers of data has been shown to be an effective
way of prolonging sensor network lifetime and of relaying data in partitioned networks. The …

Higher-powered relay nodes have been proposed as cluster heads in hierarchical sensor
networks to increase the network connectivity, coverage and lifetime. Determining an …

We consider a new problem related to data gathering in sensor networks based on multiple
mobile sink elements. The problem involves the planning of a set of tours (cycles or closed …

In hierarchical sensor networks, higher powered relay nodes can be deployed to act as
cluster heads. The lifetime of such a network is primarily determined by the lifetime of the …

We consider the problem of routing and scheduling a set of mobile elements that act as
mechanical carriers of data, harvesting them from sensor nodes and delivering them to a …

This paper considers a spatially separated wireless sensor network, which consists of a
number of isolated subnetworks that could be far away from each other in distance. We …

This paper proposes a pro-active solution to the Frugal Feeding Problem (FFP) in Wireless
Sensor Networks. The FFP attempts to find energy-efficient routes for a mobile service entity …

An intelligent method to discover the optimal path for a mobile sink that collects data from
sensors in a wireless sensor network is presented. The method uses a modified travelling …