We consider in this letter the problem of constrained relay node (RN) placement where
sensor nodes must be connected to base stations by using a minimum number of RNs. The …

In wireless sensor networks (WSNs) energy is a scarce resource which must be utilized
efficiently in order to enhance the network lifetime. Two-tiered wireless sensor network (TT …

Wireless sensor networks are being geared up for applications that range from consumer
markets to military industries. While the wireless sensors perform the same sensing task …

To eliminate the routing load unbalance among sensor nodes, one approach is to deploy a
small number of powerful relay nodes acting as routing nodes in wireless sensor networks …

In a wireless sensor network, short range multihop transmissions are preferred to prolong
the network lifetime due to super-linear nature of energy consumption with communication …

In a two-tier wireless sensor network (WSN), the relay nodes act as the cluster heads for
data aggregation and dissemination to the base station. It is very crucial and difficult to find …

Relay node placement preserving coverage and connectivity is an important problem for the
deployment of a fault tolerant two tier wireless sensor network (WSN). In this paper, we …

One approach to prolong the lifetime of a wireless sensor network (WSN) is to deploy some
relay nodes to communicate with the sensor nodes, other relay nodes, and the base …

As Wireless Sensor Networks (WSNs) are widely used in time-critical applications, eg,
factory automation and smart grid, the importance of Delay Constrained Relay Node …

Federating disjoint segments may be necessary in some applications of wireless sensor
networks (WSNs). The segments can be simply distinct WSNs that operate autonomously or …