Energy Aware Routing Protocol Research For WSN

Wireless sensor network is a non-wireless network infrastructure,which combines sensor technology,embedded computing technology,distributed information processing technology and wireless communication technology,to collaborate in real-time monitoring,sensing and collecting a variety of network distribution within the region monitoring of the environment or object information.Wireless sensor networks combines sensor, communications and computer technology.In view of the wireless sensor network putted the logical world of information together with the objective physical world, changed the way humans interact with nature, thus has broad application prospects. Wireless sensor networks have many characteristics different from traditional networks, such as energy severely limited, topology changes frequently. Therefore, WSN network protocols design is different from the existing design of a large variety of network protocols and thus faces many new challenges. Compared with many agreements in the protocol stack, the network layer routing protocol algorithm as a key technology has become a research hotspot.Wireless sensor network routing protocols essentially continues the tradition of the classification of Ad hoc network classification method,based on different angles can be a different classification.According to the perspective of route discovery strategy can be divided into proactive routing and reactive routing of two types; the logical structure of the network management routing protocols can be divided into flat routing and hierarchical structure of the routing types.LEACH is based on clustering (Clustering) of the routing protocol,routing protocol in wireless sensor networks occupy an important position, the other based on clustering routing protocols, such as TEEN,APTEEN, PEGASIS are largely evolved from the LEACH.Therefore,the study of LEACH routing protocol has an important significance.Sensors are generall constrained in energy supply in wireless sensor networks and the energy of sensors can't be generally renewed.Hence how to make the best of the energy of sensors and prolong the lifetime of the total network is a hot topic in WSNs.This paper proposes a new energy-aware cluster routing algorithm G-Leach based on grads. In allusion to the flaws of Leach G-Leach proposes a new kind of cluster head selected strategy.a new kind of building cluster strategy and a new kind of routing stategy.Cluster head selected strategy balance the size of the Cluster and select cluster head based on the information of node's energy.Building cluster strategy avoids that clusters interlap each other and data redundancy.Routing stategy adopt greedy algorithm to search next hop according to node's energy and grad, and to send date to the sink.According to the simulation results by OMNET++ simulation,this algorithm had obvious advantages in saving energy and extending the lifetime of total network.