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:
Nov. 24, 2009
Filed:
Nov. 13, 2000
Stefano Faccin, Dallas, TX (US);
Tuija Hurtta, Espoo, FI;
Jaakko Rajaniemi, Helsinki, FI;
Herman Huang, Plano, TX (US);
Risto Kauppinen, Helsinki, FI;
Janne Muhonen, Helsinki, FI;
Veijo Vanttinen, Espoo, FI;
Jan Kall, Espoo, FI;
Serge Haumont, Helsinki, FI;
Jari Syrjala, Vantaa, FI;
Stefano Faccin, Dallas, TX (US);
Tuija Hurtta, Espoo, FI;
Jaakko Rajaniemi, Helsinki, FI;
Herman Huang, Plano, TX (US);
Risto Kauppinen, Helsinki, FI;
Janne Muhonen, Helsinki, FI;
Veijo Vanttinen, Espoo, FI;
Jan Kall, Espoo, FI;
Serge Haumont, Helsinki, FI;
Jari Syrjala, Vantaa, FI;
Nokia Corporation, Espoo, FI;
Abstract
An emergency telephone call is supported and routed to a Public Safety Answering Point (PSAP) in an IP based packet switched wireless communications network. An activate PDP context request is sent from a user equipment to the network. A parameter in the activate PDP context request indicates that the PDP context will be used to transfer an emergency call. An activate PDP context accept message is returned from the support node to the user equipment. The activate PDP context accept message acknowledges the activate PDP context request message and provides the address of a call state control function. A call setup request transferred to the call state control function includes the Service Area Identity (SAI). The call state control function selects a PSAP based, at least in part, on the SAI included in the call setup request and forwards the emergency call to the selected PSAP.