Method and device for recovering call service in a mobile communication system
AssigneeSamsung Electronics Co., Ltd.
InventorsWeibo Li, Min Li
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Abstract
A method and a device for recovering a call service in a mobile communication system are provided. The method includes the following steps determining whether a second cell satisfies a condition for a terminal to perform an IP multimedia subsystem (IMS) registration when detecting that the terminal enters the second cell during a period in which the terminal waits for a next IMS registration due to an IMS registration failure in a first cell, initiating an initial IMS registration when determining that the second cell satisfies the condition, and recovering a call service of the terminal after the initial IMS registration is successful.
Claims16
A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
- identifying a failure of a registration of an IP multimedia subsystem (IMS) in a first cell;
- identifying a second cell satisfies a condition for the registration of the IMS before a waiting time for a next registration of the IMS expires, wherein the waiting time starts due to the failure;
- initiating an initial registration of the IMS in a second cell before the waiting time for the next registration of the IMS expires;
- and
- recovering a call service of the UE after the initial registration of the IMS is successful.
A user equipment (UE) comprising:
- a transceiver;
- a processor;
- and
- memory storing instructions that, when executed by the processor, cause the UE to:
- identify a failure of a registration of an IP multimedia subsystem (IMS) in a first cell,
- identify a second cell satisfies a condition for the registration of the IMS before a waiting time for a next registration of the IMS expires, wherein the waiting time starts due to the failure,
- initiate an initial registration of the IMS in a second cell before the waiting time for the next registration of the IMS expires, and
- recover a call service of the UE after the initial registration of the IMS is successful.
Dependencies are inferred from the claim text.