While a lot of existing research attempts to extend the lifetime of a wireless sensor network
(WSN) by designing energy efficient networking protocols, the impact of random device …

In a heterogeneous wireless sensor network (WSN), relay nodes (RNs) are adopted to relay
data packets from sensor nodes (SNs) to the base station (BS). The deployment of the RNs …

Device deployment is a major challenge to successful implementation of large scale
wireless sensor network (WSN) applications. The number and positions of devices …

In this paper, cooperative sensor protocol and relay deployment in wireless sensor networks
(WSNs) is proposed to improve the network lifetime. First, cooperative transmission is …

In a sensor network, usually a large number of sensors transport data messages to a limited
number of sinks. Due to this multipoint-to-point communications pattern in general …

In this paper, the problem of relay node placement in heterogeneous wireless sensor
networks (WSNs) is addressed. As all nodes are energy limited, placement strategies aimed …

Wireless sensor networks (WSNs) often operate in a harsh environment such as battlefield
and may suffer simultaneous failure of multiple sensors that cause the network to become …

We investigate the benefits of a heterogeneous architecture for wireless sensor networks
(WSNs) composed of a few resource rich mobile relay nodes and a large number of simple …

Scalability and extended lifetime are two critical design goals of any large scale wireless
sensor network. A two-tiered network model has been proposed recently for this purpose …

In some applications of wireless sensor networks (WSNs), it may be necessary to link a
number of disjoint segments in order to form a federated system. The segments can be …