Ericsson Canada Inc.
Scheme of retaining LTE connection during circuit switch fall back
The present solution enables a packet switched connection to be temporarily released at the wireless terminal for supporting voice calls over a Circuit-Switched (CS) Fallback. The packet switched connection of the LTE core network retained for a pre-defined period of time during the CSFB session allowing the user to quickly switch back to the packet switched connection when the CSFB session is shorter than the predefined period or when the voice call CSFB attempt fails. This is accomplished by the introduction of a timed buffer to control the length of time the LTE core network connection and wireless context information will be retained.
Telefonaktiebolaget LM Ericsson (Publ)
H H H
H04W H04W H04W
inventional additional inventional
Weigang Indranil Guoqiang
Li Tapadar Xue