System and method for optimization of call forwarding on busy for an optimized mobile station within a satellite network

• US 6,301,466 B1
• Filed: 12/22/1998
• Issued: 10/09/2001
• Est. Priority Date: 12/22/1998
• Status: Expired due to Fees

• Current Assignee: Ericsson, Inc. (Telefonaktiebolaget LM Ericsson)
• Original Assignee: Ericsson, Inc. (Telefonaktiebolaget LM Ericsson)
• Inventors: Alperovich, Vladimir, Valentine, Eric
• Primary Examiner(s): Hunter, Daniel
• Assistant Examiner(s): Nguyen, Thuan T.
• Application Number:
  US09/218,967
• Time in Patent Office: 1,022 Days
• Field of Search: 455/12.1, 455/11.1, 455/427, 455/428, 455/433, 455/435
• US Class Current: 455/12.1
• CPC Class Codes: H04B 7/1856 for call routing
• CPC Class Codes: H04M 2207/18 wireless networks
• CPC Class Codes: H04M 3/54 Arrangements for diverting calls for one subscriber to another predetermined subscriber based on the calling party profile H04M3/42059; based on location H04M3/42348; based on presence H04M3/42365; to voice mail H04M3/53308
• CPC Class Codes: H04W 4/16 Communication-related supplementary services, e.g. call-transfer or call-hold

Abstract

A telecommunications system and method is disclosed for optimizing the Call Forwarding on Busy (CFB) feature for optimized mobile stations (MSs) within a satellite network. The CFB feature for optimized calls can be stored within the Home Location Register (HLR) associated with the MS. Therefore, when the MS becomes engaged in an optimized call, the HLR sets a busy indication associated with the optimized MS. Thereafter, when another incoming call arrives, the HLR can check the busy indication, and if it is set, the HLR determines that the MS is busy, and invokes the CFB feature.

Claims

1. A home location register within a satellite network, comprising:

a subscriber record associated with a mobile station;

a busy indication within said subscriber record responsive to an indication that said mobile station has been optimized, said optimized mobile station being registered with an optimal mobile switching center via a satellite for an optimized call, said optimized mobile station being located in a geographical area different than the geographical area served by said optimal mobile switching center;

means for receiving a routing request for an incoming call to said mobile station from a requesting node;

a call forwarding on busy feature associated with said mobile station for forwarding calls made to said mobile station to a predetermined location when said mobile station is busy; and

means for invoking said call forwarding on busy feature responsive to said routing request and said busy indication being set.

2. The home location register of claim 1, wherein said busy indication is set in response to an optimization indication within a location update request received from said optimal mobile switching center serving said mobile station.

3. The home location register of claim 1, wherein said call forwarding on busy feature comprises routing information for an end node.

4. The home location register of claim 3, further comprising:

means for sending said routing information to said requesting node in response to said routing request when said busy indication is set.

5. A method for optimizing a call forwarding on busy feature associated with a mobile station within a satellite network, comprising the steps of:

setting, by a home location register associated with said mobile station, a busy indication associated with said mobile station stored within said home location register when said mobile station is optimized, said optimized mobile station being registered with an optimal mobile switching center via a satellite for an optimized call, said optimized mobile station being located in a geographical area different than the geographical area served by said optimal mobile switching center;

receiving, by a switch, an incoming call to said mobile station from a calling party;

sending a routing request based upon said received incoming call from said switch to said home location register;

checking said busy indication in response to said received routing request; and

if said busy indication is set, invoking, by said home location register, said call forwarding on busy feature.

6. The method of claim 5, wherein said step of setting further comprises the steps of:

sending an optimization indication within a location update request from said optimal mobile switching center to said home location register; and

setting, by said home location register, said busy indication based upon said optimization indication.

7. The method of claim 6, further comprising the steps of:

terminating said optimized call by said mobile station; and

registering, by said mobile station, at an original mobile switching center serving the geographical area that said mobile station is located in.

8. The method of claim 7, further comprising the step of:

in response to said step of registering, resetting, by said home location register, said busy indication associated with said mobile station to indicate said mobile station is no longer optimized.

9. The method of claim 5, further comprising the step of:

sending routing information from said home location register to said switch in response to said routing request when said call forwarding on busy feature indicates said mobile station is optimized.

10. The method of claim 9, further comprising the step of:

forwarding said incoming call from said switch to a voice mail box associated with said mobile station within a voice mail system using said routing information.

11. A method for optimizing a call forwarding on busy feature associated with a mobile station within a satellite network, comprising the steps of:

receiving an incoming call to said mobile station;

determining whether a busy indication associated with said mobile station is set at a home location register associated with said mobile station, said busy indicated being set when said mobile station is registered with an optimal mobile switching center via a satellite for an optimized call, said optimized mobile station being located in a geographical area different than the geographical area served by said optimal mobile switching center;

if said busy indication is set, forwarding said incoming call to a predetermined location; and

if said busy indication is not set, forwarding said incoming call to a mobile switching center serving the geographical area that said mobile station is located in.

12. The method of claim 11, wherein said step of determining further comprises the steps of:

sending an optimization indication within a location update request from said optimal mobile switching center to said home location register; and

setting, by said home location register, said busy indication based upon said optimization indication.

13. The method of claim 12, wherein said step of determining further comprises the steps of:

terminating said optimized call by said mobile station;

registering, by said mobile station, at an original mobile switching center serving the geographical area that said mobile station is located in; and

in response to said step of registering, resetting, by said home location register, said busy indication associated with said mobile station to indicate said mobile station is no longer optimized.

14. The method of claim 11, wherein said step of forwarding said incoming call to said predetermined location further comprises the steps of:

sending routing information for a voice mail box associated with said mobile station within a voice mail system from said home location register to a requesting switch; and

connecting said incoming call from said switch to said voice mail box using said routing information.

15. The method of claim 11, wherein said step of forwarding said incoming call to said mobile switching center further comprises the steps of:

sending routing information for said mobile switching center from said home location register to a requesting switch; and

connecting said incoming call from said switch to said mobile station via said mobile switching center using said routing information.