Apparatus and method for handling cell update during reconfiguration in universal mobile telecommunications system user equipment
View Patent ↗The details of an apparatus and method for handling cell update during reconfiguration in universal mobile telecommunications system user equipment are disclosed herein. When a UE receives a Reconfiguration request from a UTRAN, it sets an activation time for execution of the reconfiguration. Where a cell update is required before the reconfiguration has been applied, the UE cancels the reconfiguration and proceeds with the cell update.
1. A method of performing a cell update in a user equipment, the user equipment configured for use in a communications system, the method comprising:
receiving a reconfiguration command, the reconfiguration command including an activation time at which a reconfiguration is to be applied;
applying the reconfiguration at the activation time;
detecting a trigger event which indicates that a cell update is required;
cancelling the reconfiguration procedure in response to the trigger event if the trigger event occurs before the reconfiguration has been applied;
setting a configuration failure flag;
completing a cell update; and
sending a configuration failure message, after the cell update is completed if the configuration failure flag is set.
2. A method according to claim 1 , comprising cancelling the reconfiguration procedure if the trigger event occurs before the activation time.
3. A method according to claim 1 , in which the user equipment is configured to communicate with a UTRAN, farther comprising sending a Reconfiguration_FAILURE message receivable by the UTRAN.
4. User equipment for performing a cell update, the user equipment configured for use in a communications system, the user equipment comprising:
a receiver for receiving a reconfiguration command, the reconfiguration command including an activation time at which a reconfiguration is to be applied and at which the reconfiguration is applied;
an event detector for detecting a trigger event which indicates that a cell update is required;
a controller arranged to cancel the reconfiguration procedure in response to the trigger event if the trigger event occurs before the reconfiguration has been applied;
the controller also being arranged to set a configuration failure flag and to cause the user equipment to transmit a configuration failure message configured to be receivable by the communications system after a cell update if the configuration failure flag is set.
5. User equipment according to claim 4 , wherein the controller is arranged to cancel the reconfiguration procedure if the trigger event occurs before the activation time.
6. User equipment according to claim 4 , wherein the communications system comprises a UMTS system.