Terminal apparatus and method
A terminal apparatus includes: a processing unit configured to determine, in a case that the terminal apparatus requests re-establishment of an RRC connection, whether or not the terminal apparatus is configured with NGEN-DC, release, in a case that the terminal apparatus is configured with NGEN-DC, an NR secondary cell group, and release, in the release of the NR secondary cell group, an RLC entity for an RLC bearer configured for the NR secondary group.
1. A terminal apparatus comprising:
processing circuitry configured to:
determine whether or not NG-RAN E-UTRA-NR Dual Connectivity (NGEN-DC) is configured to the terminal apparatus in a case of requesting RRC connection re-establishment to a base station apparatus on an E-UTRA side,
trigger a release of an NR secondary cell group in Multi-RAT Dual Connectivity (MR-DC) in a case that NGEN-DC is configured to the terminal apparatus, and
release an RLC entity for each RLC bearer configured in the NR secondary cell group in the MR-DC in a case that the release of the NR secondary cell group in the MR-DC is triggered.
2. A base station apparatus comprising:
receiving circuitry configured to:
receive a request for RRC connection re-establishment from an E-UTRA side of a terminal apparatus, wherein
in a case of receiving the request for RRC connection re-establishment,
a release of an NR secondary cell group in Multi-RAT Dual Connectivity (MR-DC) is triggered in a case that NGEN-DC (NG-RAN E-UTRA-NR Dual Connectivity) is configured to the terminal apparatus, and
an RLC entity for each RLC bearer configured in the NR secondary cell group in the MR-DC is released in a case that the release of the NR secondary cell group in the MR-DC is triggered.
3. A method of a terminal apparatus, the method comprising:
determining whether or not NG-RAN E-UTRA-NR Dual Connectivity (NGEN-DC) is configured to the terminal apparatus in a case of requesting RRC connection re-establishment to a base station apparatus on an E-UTRA side,
triggering a release of an NR secondary cell group in Multi-RAT Dual Connectivity (MR-DC) in a case that NGEN-DC is configured to the terminal apparatus, and
releasing an RLC entity for each RLC bearer configured in the NR secondary cell group in the MR-DC in a case that the release of the NR secondary cell group in the MR-DC is triggered.
4. A method of a base station apparatus, the method comprising:
receiving a request for RRC connection re-establishment from an E-UTRA side of a terminal apparatus, wherein
in a case of receiving the request for RRC connection re-establishment,
a release of an NR secondary cell group in Multi-RAT Dual Connectivity (MR-DC) is triggered in a case that NG-RAN E-UTRA-NR Dual Connectivity (NGEN-DC) is configured to the terminal apparatus, and
an RLC entity for each RLC bearer configured in the NR secondary cell group in the MR-DC is released in a case that the release of the NR secondary cell group in the MR-DC is triggered.