balanced LEACH protocol for WSN

In WSN, LEACH (Low Energy Adaptive Clustering Hierarchy) is a well-known architecture for selection of cluster head for making clusters. But in this architecture there is only simple formula which is used for selection of cluster head. That is it having simple unbalanced structure for selection of cluster head. Main thing is that to increase reachability over area where sensor node deployed in that practical case Load balancing required, so paper simply describe a load balancing at network level (MP-LEACH) as well as load balancing at cluster level (MG-LEACH). Residual energy important phenomena because this is cumulative energy of all sensor node which takes active participation in network function, which means that how much reachability of base station over sensor network.