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. 03, 2002
Filed:
Dec. 17, 1999
Robert E. Denman, Plano, TX (US);
Don L. Jackson, Murphy, TX (US);
Donald V. Hanley, McKinney, TX (US);
Paul H. Boudreaux, Garland, TX (US);
Stewart H. Maxwell, Dallas, TX (US);
Nortel Networks Limited, St. Laurent, CA;
Abstract
An improved method and system for providing packet-switched management of switching and handoff functions for a mobile terminal during call setup and user communication phases of a telecommunication session. A radio access network (RAN) including an air-interface base station in communication with the mobile terminal is in communicative contact with a packet-switched core network comprised of a plurality nodes which provide functionality that is equivalent to that of a network of Mobile Switching Centers (MSCs) and Visitor Location Registers (VLRs). A packet-switching backbone network provides communication transport facilities within the core network. Within the core network is a wireless access gateway (WAG) having media channels that provide an interface between the RAN and the core network. An Anchor Packet Gateway (APG) extends the bearer path from the WAG, and hides mobility between WAGs during the user communication phase. A wireless mobility server (WMS) in communicative contact with the WAG and APG serves as a media gateway controller for the WAG and APG, controlling connectivity of the media channels within the WAG and APG. A PSTN Trunking Media Gateway (PTMG) provides connectivity between the core network and the PSTN. A Call Server (CS) in communicative contact with the PTMG and WMS serves as a media gateway controller for the PTMG and WMS, where the WMS presents the appearance of a media gateway to the CS, but in fact functions as a media gateway controller for the WAG and APG. The CS and WMS together present the appearance of a single MSC/VLR to the public cellular or PCS network.