Terminal device, base station, and communication method for setting TTI channel

A method for a terminal device that communicates with a base station, the method comprising:

• setting bitmap information indicating resources to be allocated within a predetermined time domain defined by a plurality of symbols, based on an upper layer signaling from the base station;
• setting resource block information in a frequency direction to which a channel to be allocated, based on another upper layer signaling from the base station;
• setting a mapping mode based on a physical layer signaling from the base station;
• and
• receiving the channel in a first mode or a second mode based on the mapping mode,
• wherein the channel is allocated to at least one of one or more channel candidates within the resource which is determined based on the bitmap information and the resource block information,
• wherein the bitmap information indicates whether or not the channel candidate is included in the resource of the time domain corresponding to each bit,
• wherein a schedule timing in the first mode is performed in units of the predetermined time domain, and a schedule timing in the second mode is performed in units of the symbol,
• wherein the one or more channel candidates within the resource is defined by a search space set.

A base station that communicates with a terminal device, the base station comprising:

• circuitry configured to
• transmit an upper layer signaling to the terminal device, the upper layer signaling being used to set bitmap information at the terminal device, the bitmap information indicating resources to be allocated within a predetermined time domain defined by a plurality of symbols;
• transmit another upper layer signaling to the terminal device, the other upper layer signaling being used to set resource block information, at the terminal device, in a frequency direction to which a channel to be allocated;
• and
• transmit a physical layer signaling to the terminal device, the physical layer signaling being used to set a mapping mode at the terminal device, the terminal device receiving the channel in a first mode or a second mode based on the mapping mode,
• wherein the channel is allocated to at least one of one or more channel candidates within the resource which is determined based on the bitmap information and the resource block information,
• wherein the bitmap information indicates whether or not the channel candidate is included in the resource of the time domain corresponding to each bit,
• wherein a schedule timing in the first mode is performed on a basis of the predetermined time domain, and a schedule timing in the second mode is performed on a basis of the symbol,
• wherein the one or more channel candidates within the resource is defined by a search space set.

A method for a base station that communicates with a terminal device, the method comprising:

• transmitting an upper layer signaling to the terminal device, the upper layer signaling being used to set bitmap information at the terminal device, the bitmap information indicating resources that to be allocated within a predetermined time domain defined by a plurality of symbols;
• transmitting another upper layer signaling to the terminal device, the other upper layer signaling being used to set resource block information, at the terminal device, in a frequency direction to which a channel to be allocated;
• and
• transmitting a physical layer signaling to the terminal device, the physical layer signaling being used to set a mapping mode at the terminal device, the terminal device receiving the channel in a first mode or a second mode based on the mapping mode,
• wherein the channel is allocated to at least one of one or more channel candidates within the resource which is determined based on the bitmap information and the resource block information,
• wherein the bitmap information indicates whether or not the channel candidate is included in the resource of the time domain corresponding to each bit,
• wherein a schedule timing in the first mode is performed on a basis of the predetermined time domain, and a schedule timing in the second mode is performed on a basis of the symbol,
• wherein the one or more channel candidates within the resource is defined by a search space set.