Amsc Subsidiary Corporation

Mobile Satellite Ventures, LP

Motient Services Inc.

Edward J Modzelesky

William R Tisdale

Gary G Churan

Michael E Threadgill

Charles H Biegel

Charles Kittiver

A mobile satellite system including a satellite communication switching office and network system having a satellite antenna for receiving and transmitting a satellite message via a satellite to and from a mobile earth station including a mobile communication system, a satellite interface system, a central controller receiving and transmitting the satellite message from the mobile earth station to and from the satellite communication switching office via the satellite and the satellite interface system. The mobile communication system includes a user interface system providing a user interface through which a user has access to services supported by the mobile satellite system and an antenna system which provides an interface between the mobile communication system and the mobile satellite system via the satellite interface system.

Network control center for satellite communication system

A mobile satellite system including a satellite communication switching office and network system having a satellite antenna for receiving and transmitting a satellite message via a satellite to and from a mobile earth station including a mobile communication system, a satellite interface system, a central controller receiving and transmitting the satellite message from the mobile earth station to and from the satellite communication switching office via the satellite and the satellite interface system. The mobile communication system includes a user interface system providing a user interface through which a user has access to services supported by the mobile satellite system and an antenna system which provides an interface between the mobile communication system and the mobile satellite system via the satellite interface system. The antenna system receives a first satellite message from the satellite and transmits a second satellite message to the satellite. The mobile satellite system is responsively connected to the mobile communication system. The mobile satellite system comprises a network operations center (NOC) which manages and controls the resources of the satellite network system and conducts the administrative functions associated with the management of the satellite network system. The NOC communicates with the various internal and external entities via a control network. A network communications controller (NCC) manages the allocation of circuits between the mobile communication system and the satellite switching office for supporting communications. Available circuits are held in circuit pools managed by at least one Group Controller (GC) in the NCC, the NCC communicating with the NOC via said control network. The GC includes components which control call setup and monitoring, management of satellite resources during call setup and cleardown, database management, call record management, congestion control, generation of performance and traffic statistics, and periodic performance verification testing.

A mobile satellite system including a satellite communication switching office and network system having a satellite antenna for receiving and transmitting a satellite message via a satellite to and from a mobile earth station including a mobile communication system, a satellite interface system, a central controller receiving and transmitting the satellite message from the mobile earth station to and from the satellite communication switching office via the satellite and the satellite interface system. The mobile satellite system comprises a network operations center (NOC) which manages and controls the resources of the satellite network system and conducts the administrative functions associated with the management of the satellite network system. The NOC communicates with the various internal and external entities via a control network. A network communications controller (NCC) manages the allocation of circuits between the mobile communication system and the satellite switching office for supporting communications. Available circuits are held in circuit pools managed by at least one Group Controller (GC) in the NCC, the NCC communicating with the NOC via said control network. The GC includes components which control call setup and monitoring, management of satellite resources during call setup and cleardown, database management, call record management, congestion control, generation of performance and traffic statistics, and periodic performance verification testing.

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Leesburg, VA, United States of America

Edward J Modzelesky