The integration of different wired and wireless access technologies constitute the next-generation heterogeneous network. A typical wireless sensor network configuration consists of sensors sensing and transmitting their observation values to some control center, the so-called sink node, which serves as a user interface. Due to the limited transmission range, sensors that are far away from the sink deliver their data through multihop communications. As sensor devices are resource constrained, extending the network life time is very crucial to the functioning of the system. In this paper it is proposed to identify a one dominant node based topology in heterogeneous set up. The topology management is proved to be highly energy efficient.