The data services that are available between the space station Freedom and the users of Freedom located on the ground are described from a user's perspective. These services consist of path service on the onboard LAN to provide minimum service and maximum throughput for telemetry, ISO protocol services on the LAN to provide robust end-to-end communications and applications services, path and bitstream services over dedicated high-rate links from payloads to communications and tracking system input ports for telemetry, audio service for two-way voice communications with the ground, and video services for two-way videoconferencing and standard video-image data. The space station will use virtual channels (VCSs) to deliver predefined data sets (packaged in a VC) to the correct destinations for data traveling in both the forward (ground-to-space) and return (space-to-ground) directions. The VC provides a means of dividing the single physical RF link into a number of smaller 'virtual' links that can be reassigned as required, and also of creating a virtual link between the two end points of the VC.
Data services for space station Freedom
Datendienste für die Raumstation Freedom
IEEE Network ; 4 , 5 ; 29-32
1990
4 Seiten, 4 Quellen
Aufsatz (Zeitschrift)
Englisch
NTIS | 1990
British Library Online Contents | 1993
|NTRS | 1991
|NTRS | 1990
NTRS | 1990