Communication system and method for notification and call routing in a mobile satellite network

• US 6,070,073 A
• Filed: 12/18/1997
• Issued: 05/30/2000
• Est. Priority Date: 12/18/1997
• Status: Expired due to Fees

• Current Assignee: Nortel Networks Limited (Nortel Networks Corporation)
• Original Assignee: Nortel Networks Corporation
• Inventors: Homayoun, Fereldoun, Maveddat, Payam, Lo, Wing
• Primary Examiner(s): Trost, William G.
• Assistant Examiner(s): Persino, Raymond B.
• Application Number:
  US08/993,472
• Time in Patent Office: 894 Days
• Field of Search: 455/427, 455/428, 455/429, 455/430, 455/12.1, 455/13.1, 455/13.2, 455/8, 455/9, 455/10, 455/4, 455/67.1, 455/13.4, 379/221, 379/26, 379/22, 379/23
• US Class Current: 455/428
• CPC Class Codes: H04B 7/18584 Arrangements for data networking, i.e. for data packet routing, for congestion control data switching networks H04L12/00

Abstract

A communication system and methodology are implemented to anticipate periodic or predictable disruptions of communications in a satellite communication network. The communication system and methodology then compensate for this disruption in an appropriate manner. Such prediction and compensation actions are performed for a selected group of subscribers ("premium" subscribers) who wish to originate or receive telephone calls during the period of time that the outage or disruption occurs. To compensate for such predictable outages, the communication network takes advantage of the multiple gateways typically implemented within mobile satellite communicate networks. Rather than using the multiple gateways for redundancy, the communication network and methodology recognize that the multiple gateways may also be used for the alternate routing of telephone calls, particularly during a period of time in which the outage occurs. Through this methodology, a "virtual routing" operation may be executed.

Claims

1. A communication system, comprising:

first communication means for selectively routing data to a first device in response to a first plurality of control signals, the first communication means detecting a first outage event and providing a second plurality of control signals in response to the first outage event;

second communication means; and

a satellite for communicating the first plurality of control signals and the second plurality of control signals with the first communication means, the satellite selectively rerouting the first plurality of control signals from the first communication means to the second communication means in response to the second plurality of control signals.

2. The communication system of claim 1, wherein the first outage event is a predictable outage event.

3. The communication system of claim 2, wherein the predictable outage event is a sun transit event.

4. The communication system of claim 1, wherein the satellite has a geo-stationary orbit.

5. The communication system of claim 1, wherein the first device is a mobile telephone.

6. The communication system of claim 1, wherein the first communication means, comprises:

an intelligent peripheral device for detecting the first outage event; and

a first gateway coupled to the intelligent peripheral device for generating the second plurality of control signals in response to the first outage event and for communicating the second plurality of control signals to the satellite.

7. The communication system of claim 6, wherein the second communication means comprises:

a second gateway for selectively receiving the first plurality of control signals from the satellite.

8. The communication system of claim 7, wherein the first communication means further comprises:

a network control device coupled to the first gateway and coupled to the second gateway, the network control device selectively enabling one of the first gateway and the second gateway to respond to the first plurality of control signals.

9. The communication system of claim 8, wherein the first device is a mobile telephone and wherein the first communication means further comprises:

a home location register coupled to the intelligent peripheral and coupled to the first gateway, the home location register indicating a relative location of the mobile telephone.

10. The communication system of claim 9, further comprising:

a public switched telephone network for selectively routing a telephone call to the mobile telephone subscriber through the second gateway.

11. The communication system of claim 10, wherein the public switched telephone network selectively routes the telephone call to the mobile telephone subscriber through the second gateway when the first outage event occurs.

12. A method for operating a communication system having a user, comprising the steps of:

detecting a first outage event;

providing a first plurality of control signals to a satellite;

communicating a first message to the user to indicate that the first outage event has been detected;

enabling a first gateway to selectively route data to the user in response to a first plurality of control signals;

providing a second plurality of control signals in response to the first outage event; and

enabling the satellite to reroute a first incoming message from the first gateway to a second gateway in response to the second plurality of control signals.

13. The method of claim 12, wherein the first outage event is a predictable outage event.

14. The method of claim 13, wherein the predictable outage event is a sun transit event.

15. The method of claim 12, further comprising the steps of:

detecting a termination of the first outage event;

providing a third plurality of control signals to the satellite; and

communicating a second message to the user to indicate that the termination of the first outage event has been detected.

16. The method of claim 15, further comprising the step of:

enabling the satellite to reroute a second incoming message from the second gateway to the first gateway in response to the third plurality of control signals.

17. The method of claim 12, wherein the first message is a short message service message.

18. The method of claim 12, wherein the user is a mobile telephone subscriber having a mobile telephone associated with a first mobile switching center.

19. The method of claim 18, further comprising the step of:

tuning the mobile telephone to be associated with a second mobile switching center in response to the first message.

20. The method of claim 19, further comprising the step of:

enabling a network control center to transfer an incoming message from the first mobile switching center to the second mobile switching center in response to the first message.

21. The method of claim 12, further comprising the steps of:

detecting a termination of the first outage event;

providing a third plurality of control signals to the satellite; and

communicating a second message to the user to indicate that the termination of the first outage event has been detected.

22. A program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine to perform method steps for communicating a first incoming message to a user of a communication system, the method steps comprising:

detecting a first outage event;

providing a first plurality of control signals to a satellite;

communicating a first message to the user to indicate that the first outage event has been detected;

enabling a first gateway to selectively route data to the user in response to a first-plurality of control signals;

providing a second plurality of control signals in response to the first outage event; and

enabling the satellite to reroute a first incoming message from the first gateway to a second gateway in response to the second plurality of control signals.

23. The program storage device of claim 22, wherein the first outage event is a predictable outage event.

24. The method steps of claim 22, further comprising the steps of:

detecting a termination of the first outage event;

providing a third plurality of control signals to the satellite; and

communicating a second message to the user to indicate that the termination of the first outage event has been detected.

25. The method steps of claim 24, further comprising the step of:

enabling the satellite to reroute a second incoming message from the second gateway to the first gateway in response to the third plurality of control signals.

26. The program storage device of claim 22, wherein the user is a mobile telephone subscriber having a mobile telephone associated with a first mobile switching center.

27. The method steps of claim 26, further comprising the step of:

tuning the mobile telephone to be associated with a second mobile switching center in response to the first message.

28. The method steps of claim 27, further comprising the step of:

enabling a network control center to transfer an incoming message from the first mobile switching center to the second mobile switching center in response to the first message.

29. A method for operating a satellite to gateway communication system having comprising the steps of:

separating users connected to a first gateway between a first group of users and a second group of users, said first group of users being given routing priority over the second group of users during an outage;

detecting an outage event between a satellite and the first gateway; and

routing the first group of users from said first gateway to a second gateway during the outage event.

30. The method of claim 29, wherein:

the first gateway is typically used by the selected group of subscribers; and

incoming calls to said second group of users are blocked during the outage event.

31. The method of claim 29, wherein the second gateway remains operable during the outage event and the first gateway becomes inoperable during the outage event.

32. A communication system having a user, comprising:

means for detecting a first outage event;

means for providing a first plurality of control signals to a satellite; and

means for communicating a first message to the user to indicate that the first outage event has been detected;

means for enabling a first gateway to selectively route data to the user in response to a first plurality of control signals;

means for providing a second plurality of control signals in response to the first outage event; and

means for enabling the satellite to reroute a first incoming message from the, first gateway to a second gateway in response to the second plurality of control signals.

33. The communication system of claim 32, wherein the first outage event is a predictable outage event.

34. The communication system of claim 32, further comprising:

means for detecting a termination of a first outage event;

means for providing a third plurality of control signals to the satellite; and

means for communicating a second message to the user to indicate that the termination of the first outage event has been detected.

35. The communication system of claim 34, further comprising:

means for enabling the satellite to reroute a second incoming message from the second gateway to the first gateway in response to the third plurality of control signals.