Availability improvement of F-GTS hybrid satellite network by introducing satellite-diversity (Sat. D)/site-diversity (SD) systems

摘要

This paper presents a new satellite communication network (F-GTS Hybrid), which is combined with a GSO satellite system and medium Earth orbit (MEO) satellite system for ultra high bit rate information transmissions, with high network availability via satellite-diversity (Sat. ^D) and site-diversity (SD) systems. ^To increase the network communication capacity, the optical-fiber geostationary tether satellite (F-GTS) system concept is introduced. ^By using the F-GTS system, total capacity can be increased from five to 10 times that of a conventional single GSO satellite system. ^For the system design of the F-GTS Hybrid, it must overcome rain attenuation discontinuity in the 30/20-GHz band. ^For this purpose, utilization of the Sat. ^D system and the SD system for the F-GTS Hybrid is examined. ^By using those two diversity systems, network availability and reliability of the network can be remarkably improved. ^As an example, estimated MEO satellite system can with 0.17 percent unavallability value can be implemented. ^(Author)