Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1996-06-03
1999-03-30
Urban, Edward F.
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455435, 455445, H04Q 720
Patent
active
058900632
ABSTRACT:
A centralized database within a Public Switched Telephone Network (PSTN) interfacing with a donor Public Land Mobile Network (PLMN) stores correlation data correlating a network address representing the new home location register (HLR) associated with a ported mobile station's identification number. As the centralized database is updated, such correlation data are further downloaded to the donor HLR. Thereinafter, in situations where the GMSC associated with the donor PLMN receives an incoming signal where no centralized database query has yet been performed, the donor HLR accordingly retrieves the stored network address correlated with the ported mobile station and forwards the incoming signal using the retrieved network address as the Called Party Number. The original mobile station identification number is also included into the Generic Address Parameter (GAP) of the routed IAM signal. The modified IAM signal is then routed to the proper Gateway Mobile Switching Center (GMSC) and accordingly forwarded to a mobile switching center (MSC) currently serving the ported mobile station.
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Generic Switching and Signaling Requirements for Number Portability J.J. Lichter, AT&T Network Systems, Generic Requirements, Issue 1.00 Feb. 2, 1996--pp. 1-75.
Ericsson Inc.
Gesesse Tilahun
Urban Edward F.
LandOfFree
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