TSAT network architecture

The Transformational Satellite Communications System (TSAT) is poised to become the DoD's next generation protected and processed satellite system. This paper describes the network architecture of the TSAT system. The presence of a high capacity IP router on the satellite pay- load is a key distinguishing feature of the TSAT system. The TSAT pay load also provides RF and optical circuit switching capabilities. We describe the physical elements which comprise the TSAT network, and their interconnecting TSAT mechanisms that support fixed and mobile terminals, and the approach TSAT uses to support time- varying link conditions. We discuss key network protocols, communications standards and technologies employed within the TSAT system, with particular focus on routing, quality of service, network services, and network security. This paper also presents the TSAT approach towards supporting circuit services, as well as providing security at physical and link layer.