The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 12, 2000
Filed:
Aug. 26, 1998
Margaret Britt, Pointe-Claire, CA;
Nadia Bishai, Town of Mount Royal, CA;
Telefonaktiebolaget LM Ericsson, Stockholm, SE;
Abstract
A method of routing a call directed to a portable directory number in a radio telecommunications network having an originating mobile switching center (O-MSC), a home location register (HLR), and a Number Portability Database (NPDB). The O-MSC determines whether to send a Location Request (LOCREQ) message to the HLR for a routing number, or to send a Number Portability Request (NPREQ) message to the NPDB for a location routing number (LRN). The determination may be based on operator preference, a default preference, or statistics indicating that either the HLR or the NPDB is more likely to return a routing number. The O-MSC then attempts to obtain a routing number from the determined destination. If an error message is returned, the O-MSC attempts to obtain a routing number from the alternate destination. Upon receipt of a routing number, the O-MSC routes the call. In an alternative embodiment, the O-MSC may send the LOCREQ message and the NPREQ message simultaneously, and utilize the first routing number received to route the call.