A Study On Energy Efficient Wireless Sensor Network Protocol Based On Radio Triggered Wake-up Scheme

The wireless sensor network (WSN) is introduced in this paper. Wireless Sensor Networks (WSN) use battery-operated computing and sensing devices. It is often impractical or even impossible to charge or replace the exhausted batteries of the nodes. Thus energy consumption is the main concern in a wireless sensor network. Moreover, a critical event detected by the sensor network should be delivered to the user as soon as possible. Thus, for the sensor networks, both energy efficiency and transmission latency are important parameters.In this paper, we proposed a radio triggered, token based, energy efficiency and low transmission delay MAC protocol for wireless sensor networks, which addresses all the source of energy waste to make the medium access more energy efficient, while keeping transmission delay low.The currently available MAC protocol which focus on the energy efficiency mainly require that proper Duty-cycling strategies for sender and receiver nodes, which may direct a transmission delay. However, in our proposed protocol-I-ESTR, to replace the duty-cycling strategy, we used a radio triggered wake up hardware to send the wake up radio in order to wake up the sensor nodes on demand, which may lower the transmission delay. On the other hand, we also used a token based strategy to allocate the transmission duration time among each nodes of the senor network.For evaluating the novel MAC protocol, we have simulated this protocol and two very efficient and established MAC protocols under the OMNET++ 4.1 Version, S-MAC and RTS/CTS IEEE 802.11. The simulation results indicate that the I-ESTR has very good performance.