Satellite communications system having distributed user assignment and resource assignment with terrestrial gateways

• US 5,918,157 A
• Filed: 03/18/1997
• Issued: 06/29/1999
• Est. Priority Date: 03/18/1997
• Status: Expired due to Term

• Current Assignee: Globalstar Incorporated
• Original Assignee: Globalstar Incorporated
• Inventors: Wiedeman, Robert A., Monte, Paul A.
• Primary Examiner(s): CUMMING, WILLIAM D
• Application Number:
  US08/819,310
• Time in Patent Office: 833 Days
• Field of Search: 455/12.1, 455/13.1, 455/405, 370/93, 370/320
• US Class Current: 455/13.1
• CPC Class Codes: H04B 7/18539 Arrangements for managing radio, resources, i.e. for establishing or releasing a connection

Abstract

A satellite communications system (10) includes at least one satellite (12); a system controller (38); a plurality of gateways (18); and at least one user terminal (13) operable for bidirectionally communicating with at least one of the gateways through the at least one satellite. Individual ones of the plurality of gateways are bidirectionally coupled to at least one terrestrial communications system (4) and act to couple the user terminal to the terrestrial communication system through at least one satellite. In accordance with an aspect of this invention, individual ones of the plurality of gateways are operable for receiving an access request from the user terminal, through at least one satellite, and are further operable for notifying the requesting user terminal, through at least one satellite, that the user terminal is one of accepted by the gateway for establishing a communication link and not accepted by the gateway for establishing the communication link. A gateway that does not accept a user terminal can indicate to the user terminal, based at least in part on a determined location of the user terminal, an identification of a gateway to which the user terminal should apply for access or log-in purposes. The system further includes a data network (39) that interconnects the system controller and the plurality of gateways. The data network may be conveyed by and embodied in one of a wired network, a wireless network, and a combination of a wired network and a wireless network.

Claims

1. A satellite communications system, comprising:

at least one communications satellite;

a system controller;

a plurality of gateways;

at least one user terminal comprising means for bidirectionally communicating with at least one of said gateways through said at least one communications satellite; and

a data communications network coupled between said system controller and said plurality of gateways such that said system controller selectively assigns system resources to individual ones of said plurality of gateways, over said data communications network, based at least in part on a predicted demand for system resources, said data communications network bidirectionally coupling together said plurality of gateways and said system controller and being transmitted through, at least in part, at least one earth orbiting satellite.

2. A satellite communications system as set forth in claim 1, wherein individual ones of said plurality of gateways are bidirectionally coupled to at least one terrestrial communications system, and wherein individual ones of said plurality of gateways comprise means for receiving an access request from said at least one user terminal through said at least one satellite, and further comprise means for notifying said requesting user terminal that the user terminal is one of accepted by the gateway for establishing a communication link with one of the terrestrial communications network or another user terminal, or is not accepted by the gateway for establishing the communication link.

3. A satellite communications system as set forth in claim 1, wherein individual ones of said plurality of gateways are bidirectionally coupled to a database of active, logged-in user terminals, and wherein individual ones of said plurality of gateways comprise means for receiving a log-in request from said at least one user terminal through said at least one satellite, and further comprise means for notifying said requesting user terminal of one of:

(a) that the user terminal'"'"'s log-in request has been accepted by the gateway for storage in the database; and

(b) that the user terminal'"'"'s log-in request has not been accepted by the gateway.

4. A satellite communications system as set forth in claim 1, wherein said data communications network is comprised of RF links between said at least one earth orbiting satellite and at least one of said plurality of gateways.

5. A satellite communications system as set forth in claim 1, wherein said data communications network is comprised of terrestrial RF links between at least two of said plurality of gateways.

6. A satellite communications system as set forth in claim 1, wherein said data communications network conveys information for coordinating the assignment of user terminals to individual ones of said gateways.

7. A satellite communications system as set forth in claim 1, wherein said at least one communications satellite is one of a constellation of communications satellites, and wherein said at least one earth orbiting satellite is one of said constellation of communications satellites.

8. A satellite communications system as set forth in claim 1, wherein said at least one communications satellite is one of a constellation of communications satellites, and wherein said at least one earth orbiting satellite is not one of said constellation of communications satellites.

9. A satellite communications system as set forth in claim 1, wherein said at least one communications satellite is one of a constellation of non-geosynchronous orbit communications satellites, and wherein said at least one earth orbiting satellite is a geosynchronous orbit satellite.