Patent ID: 9094989
Filing Date: 2015-07-28
Classification: H04W

Abstract:
1. A base station apparatus applied to a mobile communication system in which a plurality of cells are allocated to a mobile station apparatus, the plurality of cells grouped into a plurality of transmission timing cell groups, random access from the mobile station apparatus to the base station apparatus executed in each of the transmission timing cell groups, the base station apparatus comprising: a control circuitry configured to provide an instruction about a contention based random access procedure or a non-contention based random access procedure, by using random access instruction information in a physical downlink control channel, the control circuitry further configured to provide an instruction about a non-contention based random access procedure with respect to at least one of the cells belonging to a second transmission timing cell group other than the first transmission timing cell group, by using random access instruction information in the physical downlink control channel.