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:
May. 28, 2013
Filed:
Jun. 16, 2008
Yuzhen Huo, Guangdong Province, CN;
Yangwei Tu, Guangdong Province, CN;
Yuzhen Huo, Guangdong Province, CN;
Yangwei Tu, Guangdong Province, CN;
ZTECorporation, Shenzhen, CN;
Abstract
The present invention provides a method for obtaining a proxy call session control function address, comprising when a terminal accesses an IP multi-media subsystem through a world interoperability for microwave access (WiMAX) network in roaming scenarios, a visited authentication, authorization, and accounting server (V-AAA) of the terminal retransmitting an access request message sent by an access service network (ASN) or a dynamic host configuration protocol (DHCP) or a home agent (HA) of said terminal to a home authentication, authorization, and accounting server (H-AAA) of said terminal after receiving the access request message, and H-AAA finally deciding whether the P-CSCF is located in a visited network or a home network according to a roaming protocol and visited network capability, and returning the determined P-CSCF address information, included by H-AAA in an access accept message corresponding to said access request message, to the sender of said access request message through V-AAA.