In order to effectively balance energy consumption of nodes and to relieve energy-hole problem and prolong network life cycle in wireless sensor networks（ WSNs）

a new energy-efficient uneven clustering routing protocol for WSNs is proposed. The core idea of the protocol is using an uneven clustering algorithm—BR-EEUC which combines with timing broadcast and cluster head rotation mechanism to clustering network

and according to cost function to choose a less costly cluster head as relay node

to form multi-hop routing in which sink node is used as root node

so energy cost is greatly reduced. The simulation experiment result on OMNet + + shows that

compared with LEACH and EEUC

BR-EEUC protocol effectively balance network energy consumption

and extend network lifetime.