Data relaying with optimal resource management in wireless sensor networks

In this paper, the concern is with the management of data traffic after node deployment. To address some of the shortcomings of both single and multihop communication, this paper work with a hybrid model. The WSNet architecture is comprised of three classes of sensor nodes, sensors, relay nodes, and relay gateways. Sensors - gather and send data values to one relay nodes. Relay nodes - receive data values from sensors and/or other relay nodes and forward them to relay nodes or relay gateways. Relay gateways - receive data values from RN and send them directly (in one hop) to the base station, possibly using a dedicated channel. Our goal is to select paths along which data packets can be relayed until they reach one or more relay gateways while satisfying several constraints. These decisions take place at the application level, are computed by a central algorithm running at the base station, and rely on routing protocols to deliver the messages. A fixed topology of directly communicating nodes were assumed and a long term data communication plan based on knowing the amount of data generated by sensor nodes. The optimality of the solution obtained was guaranteed