<SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">The topology control strategies of wireless sensor network are very important to reduce the energy consumptions of sensor nodes and prolong the life-span of networks. SMECN is a known topology control algorithm for wireless sensor networks. Based on analyzing the shortcoming of SMECN

this paper propose a new topology control algorithm

which is named Improvement of Minimum-Energy Communication Network (IMECN). IMECN subtly transforms the regional coverage problem into the angle superimposition problem. In IMECN

we can know whether the wireless transmission region covers this direct transmission region through comparing the sum of central angles to 2π. Finally

we analyze the computational complexity of the IMECN and simulate the energy property of IMECN.