Patent ID: 9538556
Date: 2017-01-03
CPC Classifications: H04W

Claim:
1. A mobile station apparatus configured and/or programmed to communicate with a base station apparatus by using a plurality of cells grouped into a plurality of transmission timing cell groups, the mobile station apparatus comprising: an obtaining circuitry configured and/or programmed to obtain a parameter; a transmission circuitry configured and/or programmed to perform transmission of a preamble; and a control circuitry configured and/or programmed to set a counter incremented based on transmission of the preamble, wherein the control circuitry is further configured and/or programmed to: indicate a random access problem corresponding to one transmission timing cell group in a case where the counter exceeds the parameter and the transmission of the preamble is performed on the one transmission timing cell group, the one transmission timing cell group being one of the plurality of transmission timing cell groups; and not indicate a random access problem corresponding to another transmission timing cell group in a case where the counter exceeds the parameter and the transmission of the preamble is performed on the another transmission timing cell group, the another transmission timing cell group being one of the plurality of transmission timing cell groups.