Terminal device operating with a special subframe including three regions, base station device operating with a special subframe including three regions, and communication method operating with a special subframe including three regions

A base station device comprising:

• higher layer processing circuitry that configures a first UL-DL configuration by using a common RRC message;
• and
• control circuitry that determines whether a number of enhanced control channel elements in one enhanced physical downlink control channel set in a subframe is set to 0, in a case where an uplink control channel resource is determined,
• wherein
• in a case where a second UL-DL configuration indicated by downlink control information which is transmitted on a physical downlink control channel is not set the control circuitry determines whether the number of the enhanced control channel elements k set to 0 based on whether the subframe is a predetermined special subframe in the first UL-DL configuration,
• in a case where the second UL-DL configuration set the control circuitry sets then umber of enhanced control channel elements to 0 if the subframe is the predetermined special subframe in the second UL-DL configuration, and
• the predetermined special subframe is a subframe including three regions which are a region (DwPTS) in which downlink transmission is performed, a guard period (GP), and a region (UpPTS) in which uplink transmission is performed, in this order.

A communication method of a terminal device, the communication method comprising:

• setting a first UL-DL configuration which is configured by using a common RRC message;
• determining whether a number of enhanced control channel elements in one enhanced physical downlink control channel set in a subframe, is set to 0 in a case where an uplink control channel resource is determined;
• in a case where a second UL-DL configuration indicated by downlink control information which is transmitted on a physical downlink control channel is not set, determining whether the number of the enhanced control channel elements is set to 0 based on whether the subframe is a predetermined special subframe in the first UL-DL configuration;
• and
• in a case where the second UL-DL configuration is set, setting the number of enhanced control channel elements to 0 if the subframe is the predetermined special subframe in the second UL-DL configuration;
• wherein
• the predetermined special subframe is a subframe including three regions which are a region (DwPTS) in which downlink transmission is performed, a guard period (GP), and a region (UpPTS) in which uplink transmission is performed, in this order.

A communication method of a base station device, the communication method comprising:

• setting a first UL-DL configuration which is configured by using a common RRC message;
• determining whether a number of enhanced control channel elements in one enhanced physical downlink control channel set in a subframe, is set to 0 in a case where an uplink control channel resource is determined;
• in a case where a second UL-DL configuration indicated by downlink control information which is transmitted on a physical downlink control channel is not set, determining whether the number of the enhanced control channel elements is set to 0 based on whether the subframe is a predetermined special subframe in the first UL-DL configuration;
• and
• in a case where the second UL-DL configuration is set, setting the number of enhanced control channel elements to 0 if the subframe is the predetermined special subframe in the second UL-DL configuration;
• wherein
• the predetermined special subframe is a subframe including three regions which are a region (DwPTS) in which downlink transmission is performed, a guard period (GP), and a region (UpPTS) in which uplink transmission is performed, in this order.