Network switching method and device and mobile terminal

Abstract

The embodiment of the invention discloses a network switching method which comprises the following steps: when a mobile terminal is in a first network connection state, if a target event needing to be executed under a second network is detected, a first cell list under a first network is acquired, the first cell list comprises a target first cell, and when a historical target event is triggered, the first cell list comprises the target first cell; the target first cell is connected with the mobile terminal, and the base station does not send a connection release instruction with the target first cell to the mobile terminal; determining whether a current first cell currently connected with the mobile terminal belongs to the target first cell; if yes, connection with the current first cell is disconnected, a second cell reselection list of a second network is obtained, the second cell reselection list comprises a target second cell, and when a historical target event is triggered, the mobile terminal reselects from the target first cell to the target second cell; and determining a target second cell corresponding to the current first cell based on the second cell reselection list, and connecting with the target second cell.

Description

Technical field [0001] The present invention relates to the field of communications, and more particularly to a network switching method, a device, and a mobile terminal. Background technique [0002] At present, the Vonr calls under the 5G independent network (SA) are still in the commissioning phase, and have not been real commercial. If you want to talk in SA, you can use the network policy to use the redirected or switching EPS Fallback (dropped by the evolved packet system). For redirection, due to coverage, the current operator selects the Vonr (Voice Over NR, the 5G Access Network, and the core network) call to LTE (Long Term Evolution, long-term evolution) Volte ( Voice Over LTE, voice service scheme based on multimedia subsystem IMS). Normal User Equipment (UE) issued a telephone IMS 183Session Progress on a new empty port (NR), the base station issues a redirect to the UE, allowing the UE to the LTE frequency to initiate TAU (TA tracking area update process) , TA (Track...

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a network switching method, device, and mobile terminal, which can solve the problem of slow dialing of NR calls

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