Invention Grant
- Patent Title: Method in communication device for starting a circuit switched fallback in wireless communication system
-
Application No.: US15514496Application Date: 2014-09-26
-
Publication No.: US10349316B2Publication Date: 2019-07-09
- Inventor: Xiaohui Wang
- Applicant: Telefonaktiebolaget LM Ericsson (publ)
- Applicant Address: SE Stockholm
- Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
- Current Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
- Current Assignee Address: SE Stockholm
- Agency: Leffler Intellectual Property Law, PLLC
- International Application: PCT/EP2014/070673 WO 20140926
- International Announcement: WO2016/045747 WO 20160331
- Main IPC: H04W36/00
- IPC: H04W36/00 ; H04W36/08 ; H04W80/10

Abstract:
A method in a wireless communication device for starting a Circuit Switched FallBack, CSFB, in a wireless communication system is disclosed. The wireless communication system comprises one or more Long-Term Evolution, LTE, networks and one or more 2nd or 3rd Generation, 2G/3G, networks. When the communication device is camping in an LTE network and starts a Circuit Switched, CS, service, the wireless communication device sends a CSFB request to a Mobility Management entity, MME, via an access node in the LTE network and starts a first timer and/or a first counter upon sending the CSFB request. When the first timer and/or the first counter is expired and no response to the CSFB request has been received from the LTE networks, it starts a cell search procedure in the 2G/3G networks and starts the CS service via a target cell selected by the cell search procedure in the 2G/3G networks.
Public/Granted literature
- US20170289860A1 METHOD IN COMMUNICATION DEVICE FOR STARTING A CIRCUIT SWITCHED FALLBACK IN WIRELESS COMMUNICATION SYSTEM Public/Granted day:2017-10-05
Information query