Methods and apparatus to provide packet switched service continuity during circuit switched fallback operation
AssigneeBlackBerry Limited
InventorsXinhua Ling, Xiaoming Zhao, Stefano Faccin
Life of this patent
Estimating the term…
Abstract
Methods and apparatus to provide packet switched service continuity during circuit switched fallback operation are described. One example method includes determining that a target system does not support packet switched handover; determining if non-3GPP access for packet switched service is available; and triggering handover to the non-3GPP access.
Claims56
A method in a user equipment (UE), the method comprising:
- determining that a target system does not support packet switched handover;
- determining if non-3GPP access for packet switched service is available;
- and
- triggering handover to the non-3GPP access.
A user equipment (UE) configured to:
- determine that a target system does not support packet switched handover;
- determine if non-3GPP access for packet switched service is available;
- and
- trigger handover to the non-3GPP access.
A method in network equipment, the method comprising:
- determining that a packet switched bearer corresponding to a packet data network connection is suspended;
- and
- resuming bearer status associated with the packet data network connection in response to a network message.
Network equipment configured to:
- determine that a packet switched bearer corresponding to a packet data network connection is suspended;
- and
- resume bearer status associated with the packet data network connection in response to a network message.
A method in a user equipment, the method comprising:
- determining that a packet data network connection corresponding to a suspended bearer in a 3GPP access was handed over to a non-3GPP access network;
- determining that that the packet data network connection is to be resumed;
- and
- triggering a procedure including a request type set to handover.
A user equipment configured to:
- determine that a packet data network connection corresponding to a suspended bearer in a 3GPP access was handed over to a non-3GPP access network;
- determine that that the packet data network connection is to be resumed;
- and
- trigger a procedure including a request type set to handover.
A method in network equipment, the method comprising:
- receiving a request to disconnect a last packet data network connection;
- detaching a user equipment (UE) from the last packet data network;
- and
- maintaining an attachment associated with the UE to a mobile switching center.
Network equipment configured to:
- receive a request to disconnect a last packet data network connection;
- detach a user equipment (UE) from the last packet data network;
- and
- maintain an attachment associated with the UE to a mobile switching center.
Dependencies are inferred from the claim text.