Link and Location Based Routing Mechanism for Energy Efficiency in Wireless Sensor Networks

摘要

In Wireless Sensor Networks, sensed data are reported to the sink by theavailable nodes in the communication range. The sensed data should be reportedto the sink with the frequency expected by the sink. In order to have acommunication between source and sink, Link based routing is used. Link basedrouting aims to achieve an energy efficient and reliable routing path. Thismechanism considers the status (current energy level in terms of Joules) ofeach node, link condition (number of transmissions that the Cluster Head(CH)and the Gateway (GW) candidates conducts) and the transmit power (powerrequired for transmission in terms of Joules). A metric called PredictedTransmission Count (PTX) for each node is calculated using its status, linkcondition and transmit power. The node which has highest PTX will have thehighest priority and it will be the potential candidate to act as CH or GW.Thus the selection of proper CH or GW reduces the energy consumption, and thenetwork lifetime is increased.