Terminal apparatus, method, and integrated circuit

A terminal apparatus for communicating with one or more base station apparatuses, the terminal apparatus comprising:

• a receiver configured to receive an RRC reconfiguration message including a DRB configuration from the one or more base station apparatuses,
• the RRC reconfiguration message received by the receiver including information for indicating that a full configuration is applied,
• the DRB configuration including a DRB identity, an SDAP configuration, a PDU session identifier, and a QoS flow identifier,
• the PDU session identifier being part of a current configuration of the terminal apparatus;
• and
• a processing unit configured to associate a DRB established according to the DRB configuration with the QoS flow identifier,
• in a case that the DRB identity is not part of the current configuration of the terminal apparatus.

A terminal apparatus for communicating with one or more base station apparatuses, a method comprising the steps of:

• receiving an RRC reconfiguration message including a DRB configuration from the one or more base station apparatuses,
• the RRC reconfiguration message including information for indicating that a full configuration is applied,
• the DRB configuration including an SDAP configuration, a PDU session identifier, and a QoS flow identifier,
• the PDU session identifier being part of a configuration of the terminal apparatus;
• and
• in a case that the QoS flow identifier is part of a current configuration of the terminal apparatus,
• re-establishing an SDAP entity and
• releasing a PDCP entity, an RLC entity, a DTCH logical channel, and a DRB identity of a DRB corresponding to the QoS flow identifier.

A terminal apparatus for communicating with one or more base station apparatuses, a method comprising the steps of:

• receiving an RRC reconfiguration message including a DRB configuration from the one or more base station apparatuses,
• the RRC reconfiguration message including information for indicating that a full configuration is applied,
• the DRB configuration including a DRB identity, an SDAP configuration, a PDU session identifier, and a QoS flow identifier,
• the PDU session identifier being part of a current configuration of the terminal apparatus;
• and
• associating a DRB established according to the DRB configuration with the QoS flow identifier, in a case that the DRB identity is not part of the current configuration of the terminal apparatus.