Voice call continuity in Voice-over-Wi-Fi and evolved packet system fallback
AssigneeGoogle Inc.
InventorsTai-Lun Lo, Ching-Wei Chen, Po-Ying Chuang
Life of this patent
Estimating the term…
Abstract
A user equipment (UE) in a mobile network is configured to establish a first packet data network (PDN) connection between the UE and an Internet Protocol Multimedia Service (IMS) network of the mobile network via a wireless local area network (WLAN) access point. The first PDN connection is for implementing a voice call. The UE determines that at least one of the UE or the mobile network fails to support Voice over New Radio (VoNR). Responsive to determining that at least one of the UE or the mobile network fails to support Voice over New Radio (VoNR), the UE prevents itself from establishing a connection with a first radio access network (RAN) of the mobile network.
Claims18
A method by a user equipment (UE) in a mobile network, comprising:
- establishing a first packet data network (PDN) connection between the UE and an Internet Protocol Multimedia Service (IMS) network of the mobile network via a wireless local area network (WLAN) access point, the first PDN connection for implementing a voice call;
- and
- responsive to at least one of the UE or the mobile network failing to support Voice over New Radio (VoNR), preventing the UE from establishing a connection with a first radio access network (RAN) of the mobile network;
- and
- responsive to the first PDN connection having been handed over from the WLAN access point to one of the first RAN or a second RAN implementing a different radio access technology than the first RAN, enabling the UE to establish the connection with the first RAN.
A user equipment device, comprising:
- one or more radio frequency (RF) modems configured to wirelessly communicate with at least one network;
- one or more processors coupled to the one or more RF modems;
- and
- at least one memory storing executable instructions, the executable instructions configured to manipulate at least one of the one or more processors or the one or more RF modems to:
- establish a first packet data network (PDN) connection between the UE and an Internet Protocol Multimedia Service (IMS) network of the at least one network via a wireless local area network (WLAN) access point, the first PDN connection for implementing a voice call;
- responsive to at least one of the UE or the at least one network failing to support Voice over New Radio (VoNR), prevent the UE from establishing a connection with a first radio access network (RAN) of the at least one network;
- and
- responsive to the first PDN connection having been handed over from the WLAN access point to one of the first RAN or a second RAN implementing a different radio access technology than the first RAN, enable the UE to establish the connection with the first RAN.
Dependencies are inferred from the claim text.