Apparatus and method for switching radio access technology in wireless communication system
AssigneeSamsung Electronics Co., Ltd.
InventorsJu-Yeop Kim, In-Yup Kang, Ki-Hyun Do, Jeong-Gyun Yu, Tae-Hee Lee, Dong-Hyun Choi
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Abstract
An apparatus and a method for switching a Radio Access Technology (RAT) by a User Equipment (UE) in a wireless communication system are provided. The method includes detecting an event indicating that the UE should perform a switching operation from a first RAT to a second RAT different from the first RAT occurs while the UE uses the first RAT determining whether a RAT switching operation criterion is satisfied after detecting that the event occurs and if the RAT switching operation criterion is satisfied, performing the switching operation.
Claims24
A method for switching a Radio Access Technology (RAT) by a User Equipment (UE) in a wireless communication system, the method comprising:
- detecting an occurrence of an event indicating that the UE should perform a switching operation from a first RAT to a second RAT, which is different from the first RAT, while the UE uses the first RAT;
- determining whether a RAT switching operation criterion is satisfied after detecting that the event occurs;
- and
- if the RAT switching operation criterion is satisfied, performing the switching operation,
- wherein the determining of whether the RAT switching operation criterion is satisfied comprises:
- determining whether there is a neighbor cell which has a channel quality better than a channel quality of a serving cell,
- if the neighbor cell, which has the channel quality better than the channel quality of the serving cell, exists, determining whether a priority of the serving cell is higher than a priority of a target cell, and
- if the priority of the serving cell is higher than the priority of the target cell, determining whether the RAT switching operation criterion is satisfied using parameters which are based on a first network as a network which uses the first RAT.
A User Equipment (UE) in a wireless communication system, the UE comprising:
- a controller configured to:
- detect an occurrence of an event indicating that the UE should perform a switching operation from a first RAT to a second RAT, which is different from the first RAT, while the UE uses the first RAT,
- determine whether a RAT switching operation criterion is satisfied after detecting that the event occurs, and
- perform the switching operation if the RAT switching operation criterion is satisfied,
- wherein the controller is further configured to detect the occurrence of the event by:
- determining whether there is a neighbor cell which has a channel quality, better than a channel quality of a serving cell,
- if the neighbor cell, which has the channel quality better than the channel quality of the serving cell, exists, determining whether a priority of the serving cell is higher than a priority of a target cell, and
- if the priority of the serving cell is higher than the priority of the target cell, determining whether the RAT switching operation criterion is satisfied using parameters which are based on a first network as a network which uses the first RAT.
Dependencies are inferred from the claim text.