Base station apparatus, terminal apparatus and communication method

A base station apparatus for communicating with a terminal apparatus, the base station apparatus comprising:

• a transmitter configured to transmit, to the terminal apparatus, a physical downlink control channel including downlink control information in a search space specific to the terminal apparatus;
• a controller configured to determine a number of bits of a time domain resource allocation field in the downlink control information, in which the time domain resource allocation field is associated with a physical downlink shared channel;
• and
• indicates, through a default table, a time domain resource allocation configuration for the physical downlink shared channel;
• wherein when a specific parameter is not transmitted, the number of bits of the time domain resource allocation field is determined based on a number of entries in the default table.

A communication method for a terminal apparatus communicating with a base station apparatus, the method comprising:

• receiving, from the base station apparatus, a physical downlink control channel including downlink control information in a search space specific to the terminal apparatus;
• determining a number of bits of a time domain resource allocation field in the downlink control information, in which the time domain resource allocation field is associated with a physical downlink shared channel, and
• indicates, through a default table, a time domain resource allocation configuration for the physical downlink shared channel;
• and
• when a specific parameter is not received, the number of bits of the time domain resource allocation field is determined based on a number of entries in the default table.