As a representative of hierarchy-based protocol in wireless sensor network

LEACH is an elegant solution for energy efficiency.However

LEACH still has some deficiencies such as the great cluster and small cluster coexist;unreasonable cluster head selection while the nodes have different energy;the node still consumes energy after the death of the cluster head.We propose a new energy-efficient LEACH-based protocol that employed cluster member threshold and merged the tiny cluster to avoid the great cluster and small cluster existing at the same time;estimated cluster head’s energy to reduce unnecessary energy consumption.Analysis and simulation results show that our proposed algorithm provides more uniform energy consumption among nodes and can prolong network lifetime compared to LEACH.