Mobile station apparatus stopping uplink transmission based on timer expiration and, method and processor corresponding to the same

A method of mobile station apparatus that is configured a plurality of cells by a base station apparatus, wherein

• the plurality of cells are grouped into a first group and a second group,
• the first group comprising one or more cells having a first uplink transmission timing, the first group including a primary cell, and
• the second group comprising one or more secondary cells having a second uplink transmission timing,
• the method comprising:
• configuring a first timer related to the first group and a second timer related to the second group;
• and,
• in a case where the first timer for the first group is expired,
• considering the second timer is expired, and
• stopping an uplink transmission on any cells except random access preamble transmission on the primary cell;
• and
• in a case where the second timer for the second group expired,
• stopping uplink transmission on any cells in the second group except random access preamble transmission on the secondary cell.

A processor mounted in mobile station apparatus that is configured a plurality of cells by a base station apparatus, wherein

• the plurality of cells are grouped into a first group and a second group,
• the first group comprising one or more cells having a first uplink transmission timing, the first group including a primary cell, and
• the second group comprising one or more secondary cells having a second uplink transmission timing,
• the processor comprising:
• a first circuitry configured or programmed to:
• configure a first timer related to the first group and a second timer related to the second group;
• and,
• in a case where the first timer for the first group is expired,
• consider the second timer is expired, and
• stop an uplink transmission on any cells except random access preamble transmission on the primary cell;
• and
• in a case where the second timer for the second group expired,
• stop uplink transmission on any cells in the second group except random access preamble transmission on the secondary cell.