With the development of satellite miniaturization technology and satellite carrier technology, regenerative satellites have been widely studied and applied to decrease transmission delay. In order to comprehensively consider the life cycle cost and transmission delay of satellite communication system, a new communication network architecture for carrying terminal functions on satellite is presented. In addition, a handover management procedure based on terminal on-board satellite is also introduced to solve the high dynamicity of network topology in satellite communication. Compared with taking partial terrestrial network functions onto satellite, terminal on-board seems more economically viable and efficient. And numerical results have shown that the designed architecture has lower transmission delay and is conducive to lightweight and rapid iterative deployment of satellites.