Next generation satellite communications networks

Existing communication satellites are primarily bent pipe systems retransmitting unprocessed signals in a range of reserved frequency bands. Recent flown or planned space experiments employ a new generation of space hardware, involving a high level of signal handling and switching. The decoupling of up and down links through regeneration as well as advanced routing and switching, allow new markets and applications to be economically addressed, as well as enhancements to present services. Two possible services are highlighted in this paper, one an enhancement of current private business services offered in the Ku band. This allows full mesh T1 services to be offered on low cost very small aperture terminals (VSAT). The other utilizes similar on-board technologies, applying them to the Ka band in support of new personal / mobile services. These services require the development of a new generation of regenerative / switching satellites. A possible Canadian service and technology demonstration mission, projected for the 1997 timeframe is described.