A Cluster-Based Energy Efficient Protocol For Wireless Sensor Network

With the advancement in wireless communications and micro-electronics, wireless sensor network which is one of the new-type networks has been becoming the focus of recent research and application. The wireless sensor network has limited energy, multi-types data and large network density; the sensor node is easy to become failure and has restricted communication range. As the wireless sensor network has these unique characters, the traditional protocols of wireless network aren't fit to wireless sensor networks.Furthermore, sensor network usually contains a variety of different kinds of sensors, whose priority and data quality are all different. At the meantime, frequent occurring of adding and quitting nodes and large burst data also exist in WSN. All of above propose new requirements and challenges to the design of MAC and routing algorithms in a wireless sensor network. So based on the in-depth study of WSN protocols, a cluster-based energy efficient protocol for wireless sensor network called CEEP is proposed as below:In CEEP, TDMA with sleeping mechanism is used as the MAC design. With the combination of variable slot length and the cluster head's TDMA schedule adjustment, the network can effectively deal with the new nodes in, the dead nodes out and the burst data; easily meet the demand of the nodes with different priorities.There is also a multi-hop MTE routing algorithm based on the energy comparison used in CEEP. This new routing algorithm solve the problem in the traditional ones that nodes locate too close or far form the sink node have more energy consumption. As a result, the whole network has more saved and balanced energy consumption and longer system life.Finally, we give a modeling of CEEP with NS-2 and simulate the system lift time, energy consumption and throughput in comparison with LEACH protocol. Simulation results show the better performance of CEEP.