Terminal apparatus that executes handover with improved efficiency, control method, and computer-readable storage medium

A control method executed by a terminal apparatus compliant with a 3rd Generation Partnership Project (3GPP (registered trademark)) cellular communication standard, the method comprising:

• receiving first identification information and second identification information before receiving a Cell Switch Command for instructing switching of a cell to which the terminal apparatus is connected, the first identification information identifying setting information of a cell that is a candidate cell in cell switching, and the second identification information being related to a Timing Advance value (TA value) used for the candidate cell;
• and
• in a case where the cell switching is to be performed with use of the first identification information based on reception of the Cell Switch Command, determining, based on information included in the Cell Switch Command, whether to perform uplink communication using a TA value that is based on the second identification information related to a switch destination cell,
• wherein based on a value indicating a TA value not being included in the Cell Switch Command, the terminal apparatus determines that uplink communication is to be performed using the TA value that is based on the second identification information.

A terminal apparatus compliant with a 3rd Generation Partnership Project (3GPP (registered trademark)) cellular communication standard, the terminal apparatus comprising:

• one or more processors;
• and
• one or more memories that store a computer-readable instruction for causing, when executed by the one or more processors, the one or more processors to execute a control method comprising:
• receiving first identification information and second identification information before receiving a Cell Switch Command for instructing switching of a cell to which the terminal apparatus is connected, the first identification information identifying setting information of a cell that is a candidate cell in cell switching, and the second identification information being related to a Timing Advance value (TA value) used for the candidate cell;
• and
• in a case where the cell switching is to be performed with use of the first identification information based on reception of the Cell Switch Command, determining, based on information included in the Cell Switch Command, whether to perform uplink communication using a TA value that is based on the second identification information related to a switch destination cell,
• in a case where a value indicating a TA value is included in the Cell Switch Command, the terminal apparatus determines that uplink communication is to be performed using the TA value included in the Cell Switch Command, without using the TA value that is based on the second identification information.

A control method executed by a terminal apparatus compliant with a 3rd Generation Partnership Project (3GPP (registered trademark)) cellular communication standard, the method comprising:

• receiving first identification information and second identification information before receiving a Cell Switch Command for instructing switching of a cell to which the terminal apparatus is connected, the first identification information identifying setting information of a cell that is a candidate cell in cell switching, and the second identification information being related to a Timing Advance value (TA value) used for the candidate cell;
• and
• in a case where the cell switching is to be performed with use of the first identification information based on reception of the Cell Switch Command, determining, based on information included in the Cell Switch Command, whether to perform uplink communication using a TA value that is based on the second identification information related to a switch destination cell,
• in a case where a value indicating a TA value is included in the Cell Switch Command, the terminal apparatus determines that uplink communication is to be performed using the TA value included in the Cell Switch Command, without using the TA value that is based on the second identification information.