Wireless sensor networks (WSN) is an emerging technology that has a wide range of applications in various important areas including, environmental, wildlife monitoring, artificial intelligence, medical, battle field, agriculture and research. All these area of applications requires high quality data transmission from source sensor node to destination sensor node. In military applications, electro optic sensors are deployed in battle field to capture data of enemy objects and low power sensors are deployed for transmission of data to destination node. This network is known as heterogeneous wireless sensor network for military applications. The major problems in heterogeneous wireless sensor network are interference and congestion, which minimize quality data transmission. With this research paper I proposed IMCC (Interference minimization and Congestion Control) protocol to increase the quality in data transmission in heterogeneous wireless sensor network by minimizing interference and congestion control. © 2010 IEEE.