US Patent 10925084 Apparatus and a method for MAC PDU BSR configuration

Uplink data is transmitted efficiently. A terminal device includes: a reception unit configured to receive a parameter included in an RRC message; a higher layer processing unit configured to store an uplink grant as a configured uplink grant; and a transmission unit configured to transmit a MAC protocol data unit. In a case that the parameter is configured and an initial transmission based on the configured uplink grant is performed and that the MAC protocol data unit includes only a prescribed MAC control element, the MAC protocol data unit is not transmitted. The prescribed MAC control element includes a MAC control element for a padding BSR, and does not include a MAC control element for a regular BSR.