1. A user equipment (UE) apparatus that is configured to communicate with a base station apparatus using a serving cell, the UE apparatus comprising:reception circuitry that receives a higher layer signalling; and
control channel processing circuitry that monitors a physical downlink control channel (PDCCH) on the serving cell; wherein
the higher layer signaling includes at least an information element;
the information element specifies a PDCCH configuration for the serving cell;
the PDCCH configuration includes a frequency domain resource information indicating frequency domain resources for the PDCCH and a monitoring periodicity information indicating subframes for PDCCH monitoring configured as periodicity.