Communication apparatus and communication method

A communication method, comprising:

• in a first communication apparatus:
• allocating, to a second communication apparatus, reception radio resources in a specific frequency channel;
• allocating transmission radio resources at least partially overlapping the reception radio resources on a time axis, wherein
• transmission parameters for transmission of data on the reception radio resources are switched based on a switch of the transmission of the data on the transmission radio resources;
• notifying the second communication apparatus of information regarding the reception radio resources and the transmission radio resources;
• and
• permitting the second communication apparatus to transmit a signal of at least one of random access, Grant-free access, or Grant-less access in a limited range of the transmission radio resources at least partially overlapping the reception radio resources.

A first communication apparatus, comprising:

• circuitry configured to:
• receive, from a second communication apparatus, a notification of information regarding reception radio resources allocated in a specific frequency channel and transmission radio resources allocated to at least partially overlap the reception radio resources on a time axis, wherein
• transmission parameters for transmission of data on the reception radio resources are switched based on a switch of the transmission of the data on the transmission radio resources;
• receive a first radio signal in the reception radio resources;
• transmit a second radio signal in the transmission radio resources;
• and
• receive, using specific radio resources at least partially overlapping the reception radio resources allocated to the first communication apparatus or the second communication apparatus, a notification indicating permission of transmission of a signal of at least one of random access, Grant-free access, or Grant-less access in a limited range of the transmission radio resources.

A communication method, comprising:

• in a first communication apparatus:
• receiving, from a second communication apparatus, a notification of information regarding reception radio resources allocated in a specific frequency channel and transmission radio resources allocated to at least partially overlap the reception radio resources on a time axis, wherein
• transmission parameters for transmission of data on the reception radio resources are switched based on a switch of the transmission of the data on the transmission radio resources;
• receiving a first radio signal in the reception radio resources;
• transmitting a second radio signal in the transmission radio resources;
• and
• receiving, using specific radio resources at least partially overlapping the reception radio resources allocated to the first communication apparatus or the second communication apparatus, a notification indicating permission of transmission of a signal of at least one of random access, Grant-free access, or Grant-less access in a limited range of the transmission radio resources.