Remote Link Control of Inter-university Satellite Network (Space Collaboration System)

摘要

We have developed a remote link control system which remotely switches transmitting stations, so that one can remotely use the inter-university satellite network (Space Collaboration System: SCS). The SCS is used for collaborative lectures, seminars, and symposiums with audio and video and has been playing an important role in distance education. However, the utilization is limited to one room in the campus because of the situation that one VSAT (Very Small Aperture Terminal) station is built. The primary requirement is to extend the distance range of the SCS utilization. In this paper, we discuss possible three methods of remote link control which is necessary for remote use of the SCS. We then selected the WWW (World Wide Web) client/server method which is superior in extensity and flexibility, and actually constructed the remote link control system with the WWW client/server method. To evaluate its effectiveness, we conducted verification experiments of the remote link control for students and professors. The results confirm that the WWW client/server method is superior in the switching operation and the response speed.