Radio Resource Management In Broadband Satellite Communication Systems

The current broadband mobile satellite communication systems are developing in the direction of high-speed. Next-generation broadband mobile satellite communication systems will adopt key technique in the fourth generation terrestrial cellular system to enhance the transmission rate and ensure spectrum efficiency, and at the same time try to maintain compatibility with terrestrial systems. However, considering of the satellite system’s transmission environment, radio resource management techniques in cellular mobile communication system can’t be used directly in a satellite communication system.Based on the project from the laboratory, the author takes wireless resource management techniques in broadband satellite communication systems as research project. More specifically, it mainly includes three aspects:a distributed channel assignment, channel borrowing with channel re-assignment and beam handover suitable for broadband satellite communications system.This paper first presents a channel allocation scheme based on self-organization to improve the quality of service for delay-sensitive traffic, and uses game theory to analyse this question. Further more, the author shows the Nash equilibrium of the distributed channel allocation scheme.Secondly, a channel borrowing method with channel re-allocation is proposed to reduce interference in beam edge and improve the system throughput. The author turns the problem into matching algorithm in graph theory.At last, based on the situation that in next-generation broadband mobile satellite communication system each beam uses the same resource, a new beam handover scheme is proprosed to reduce the number of beam handover times.The research of the above three theoretical research points not noly enriches the theory of wireless resource management techniques in broadband mobile satellite communication, but also provides technical support for the development of the actual system.