Method and apparatus for presentation of calling subscriber...

Details Method and apparatus for presentation of calling subscriber... Method and apparatus for presentation of calling subscriber...

2006-08-08

2006-08-08

Feild, Joseph (Department: 2681)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S414200

Reexamination Certificate

active

07089010

ABSTRACT:
Methods and apparatus for reliable transmission of a calling subscriber number (“A-numbery”) received at a Gateway Mobile Switching Center (“GMSC”) of a home Public Land Mobile Network (“PLMN”) along with an incoming call towards a roaming destination subscriber are disclosed. A GSM network entity, an UMTS network entity, and/or an Inter-Working Function is selected and interrogated by a GSM and/or UMTS MAP operation to retrieve a routing number, and to further reach the roaming subscriber and set up the call. The interrogation of the entity includes extracting the previously received A-number at the interrogating network entity, including the A-number in the interrogating GSM/UMTS MAP operation at the interrogating network entity, and forwarding the interrogation and the A-number with the interrogating GSM/UMTS MAP operation to the interrogated entity.

REFERENCES:
patent: 5915222 (1999-06-01), Olsson et al.
patent: 5930701 (1999-07-01), Skog
patent: 5974309 (1999-10-01), Foti
patent: 6101382 (2000-08-01), Granberg
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patent: 6625453 (2003-09-01), Dai et al.
patent: 6745029 (2004-06-01), Lahtinen et al.
patent: WO 97 44981 (1997-11-01), None
patent: WO 99 09760 (1999-02-01), None

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