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:
Mar. 16, 2004
Filed:
Feb. 21, 2000
Suhail Hasan, Montreal, CA;
Shohreh Savoli, Montreal, CA;
Telefonaktiebolaget L M Ericsson (publ), Stockholm, SE;
Abstract
A method of call control in a packet-switched radio telecommunication network that minimizes delays in launching a voice call from a first Internet Protocol (IP)-based mobile station (MS) to a second IP-based MS. The method includes the steps of preventing voice traffic from being routed to an Internet Service Provider (ISP), and setting up an optimized path for voice traffic from the first MS to the second MS. The optimized path may be set up by creating a shortest route tunnel between a first serving GPRS service node (SGSN ) serving the first MS and a second SGSN (SGSN ) serving the second MS. Alternatively, the tunnel may be established between the base station controllers (BSCs) of each MS's serving radio base station.