Terminal, radio communication method, base station, and system

A radio communication method performed by a terminal, the radio communication method comprising:

• receiving downlink control information that includes a resource assignment information of which a bit size is configured depending on a type of signal;
• and
• determining a resource assignment based on the resource assignment information,
• wherein a bit size of resource assignment information included in the downlink control information that schedules a downlink shared channel for transmitting system information is defined separately from a bit size of resource assignment information included in the downlink control information that schedules a downlink shared channel for transmitting user data.

A base station comprising:

• a transmitter that transmits downlink control information that includes a resource assignment information of which a bit size is configured depending on a type of a signal;
• and
• a processor that determines a resource assignment based on the resource assignment information,
• wherein a bit size of resource assignment information included in the downlink control information that schedules a downlink shared channel for transmitting system information is defined separately from a bit size of resource assignment information included in the downlink control information that schedules a downlink shared channel for transmitting user data.

A system comprising a terminal and a base station, wherein:

• the terminal comprises:
• a receiver that receives downlink control information that includes a resource assignment information of which a bit size is configured depending on a type of a signal;
• and
• a processor of the terminal that determines a resource assignment based on the resource assignment information, and
• the base station comprises:
• a transmitter that transmits the downlink control information;
• and
• a processor of the base station that determines the resource assignment based on the resource assignment information,
• wherein a bit size of resource assignment information included in the downlink control information that schedules a downlink shared channel for transmitting system information is defined separately from a bit size of resource assignment information included in the downlink control information that schedules a downlink shared channel for transmitting user data.