RADIO COMMUNICATION SYSTEM, RATIO STATION, RADIO TERMINAL, COMMUNICATION CONTROL METHOD, AND NON-TEMPORARY COMPUTER-READABLE MEDIUM

摘要

A radio terminal (3) is able to perform carrier aggregation using a first cell (10) of a first radio station (1) and a second cell (20) of a second radio station (2). The first radio station (1) exerts control, between a radio terminal (3) and itself, on the radio resources of the first cell (10) and the second cell (20) as needed for performing the carrier aggregation. The second radio station (2) and/or the radio terminal (3) transmits, to the first radio station (1), information pertaining to a radio link problem between the second radio station (2) and the radio terminal (3) in the second cell (20) while carrier aggregation of the first cell (10) and the second cell (20) is being performed. Thus, for example, in the carrier aggregation of a plurality of cells being operated by different radio stations, packet loss caused by the occurrence of a radio link problem (an RLF, for example) in a secondary cell can be reduced.