Terminal apparatus, base station apparatus, and method

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

• a receiver configured to receive, from the base station apparatus, a Radio Resource Control (RRC) reconfiguration message;
• and
• a processor, wherein
• the processor is configured to perform processing for a full configuration based at least on that a parameter indicating the full configuration is included in the RRC reconfiguration message,
• the processor is configured to, in the processing for the full configuration, release a radio bearer for a Multicast Broadcast Service (MBS) for delivery mode 1 configured for the terminal apparatus, and
• the delivery mode 1 is used for delivery of multicast.

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 Radio Resource Control (RRC) reconfiguration message;
• and
• a processor, wherein
• the processor is configured to cause the terminal apparatus to perform processing for a full configuration based at least on that a parameter indicating the full configuration is included in the RRC reconfiguration message,
• the processor is configured to, in the processing for the full configuration, cause the terminal apparatus to release a radio bearer for a Multicast Broadcast Service (MBS) for delivery mode 1 configured for the terminal apparatus, and
• the delivery mode 1 is used for delivery of multicast.

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

• receiving, from the base station apparatus, a Radio Resource Control (RRC) reconfiguration message;
• performing processing for a full configuration based at least on that a parameter indicating the full configuration is included in the RRC reconfiguration message;
• and
• releasing a radio bearer for a Multicast Broadcast Service (MBS) for delivery mode 1 configured for the terminal apparatus in the processing for the full configuration, wherein
• the delivery mode 1 is used for delivery of multicast.