关键词: 空间信息网络, 多址接入技术, 动态接入, 星间组网

Abstract: Space information network is characterized by high dynamic topology, large spatial and temporal scale, diversified tasks and limited on-board computing resources. With the maturity of satellite networking and the increasing of space activities, the dynamic Multiple Access Control（MAC） has become a key technique that influences network performance. In this paper, the typical characteristics of MAC are addressed. The performances of three classical MAC protocols（contention based distributed access control, conflict-free centralized access control and hybrid multi-protocol access control） are investigated. And their strengths and weaknesses are analyzed as well and presents its typical application scenario and adaptive mechanism in the future.

Key words: space information network, multiple access technology, dynamic access, satellite networking