CPC H04W 28/0273 (2013.01) [H04W 76/10 (2018.02); H04W 76/20 (2018.02)] | 2 Claims |
1. A terminal apparatus for communicating with a base station apparatus, the terminal apparatus comprising:
reception circuitry configured to receive a Radio Resource Control (RRC) reconfiguration message including a Data Radio Bearer (DRB) configuration from the base station apparatus; and
processing circuitry, wherein
the processing circuitry, in processing the received RRC reconfiguration message, is configured to
determine a) that a DRB identity included in the DRB configuration is not part of a current configuration of the terminal apparatus, determine b) the a Service Data Adaptation Protocol (SDAP) configuration is included in the DRB configuration, and determine c) that an SDAP entity corresponding to a Protocol Data Unit (PDU) session indicated by a PDU session information element included in the SDAP configuration does not exist,
in a case that the processing circuitry determines a) that a DRB identity included in the DRB configuration is not part of the current configuration of the terminal apparatus, b) that the SDAP configuration is included in the DRB configuration, and c) that the SDAP entity corresponding to the PDU session indicated by the PDU session information element included in the SDAP configuration does not exist,
establish an SDAP entity and
further determine d) whether it is before receiving the RRC reconfiguration message or not that the SDAP entity corresponding to the PDU session indicated by the PDU session information element does not exist,
in a case that the processing circuitry determines that the SDAP entity corresponding to the PDU session indicated by the PDU session information element does not exist,
indicate establishment of a user-plane resource for the PDU session information element to an upper layer.
|