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:
Jul. 14, 2009
Filed:
Dec. 17, 2003
Xiuli Xu, Shenzhen, CN;
Xiuli Xu, Shenzhen, CN;
ZTE Corporation, Shenchen, CN;
Abstract
A method for handing over a mobile station from wireless local area network to CDMA 20001X system, comprises the following steps of: when a mobile station detects that a signal of wireless local area network is fading, determining to hand over to CDMA 20001X system; first, initiating a call in CDMA 2000 1X system; after a base station permits the terminal to access, establishing, by a packet control function node, a R-P connection with a packet data service node; establishing data transmission channel to CDMA 20001X system for the terminal by the packet data service node; performing data transmission between the terminal and the packet data service node via the packet control function node, and disconnecting, by the packet data service node, the R-P connection established between the packet data service node and wireless access point gateway in the wireless local area network system. The present invention uses the method of first establishing a new link and then disconnecting original link, in which the packet data service node does not change. The method realizes that the terminal can perform seamless handoff between CDMA 20001X system and wireless local area network, and can maintain data transmission uninterrupted.