US 12,238,601 B2
User device and base station apparatus
Hideaki Takahashi, Tokyo (JP); Tianyang Min, Tokyo (JP); and Tooru Uchino, Tokyo (JP)
Assigned to NTT DOCOMO, INC., Tokyo (JP)
Appl. No. 17/426,425
Filed by NTT DOCOMO, INC., Tokyo (JP)
PCT Filed Feb. 14, 2019, PCT No. PCT/JP2019/005413
§ 371(c)(1), (2) Date Jul. 28, 2021,
PCT Pub. No. WO2020/166020, PCT Pub. Date Aug. 20, 2020.
Prior Publication US 2022/0104098 A1, Mar. 31, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 36/00 (2009.01); H04W 36/30 (2009.01)
CPC H04W 36/305 (2018.08) [H04W 36/0058 (2018.08); H04W 36/00698 (2023.05); H04W 36/0022 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A terminal comprising:
a communication unit configured to perform communication to which dual connectivity is applied, wherein a master node and a secondary node are configured in the dual connectivity;
a control unit configured to detect occurrence of a failure in a cell associated with the master node;
a transmission unit configured to transmit information related to the occurrence of the failure in the cell associated with the master node to the master node via the secondary node; and
a reception unit configured to receive a Radio Resource Control (RRC) message from the master node via the secondary node,
wherein the control unit changes a primary cell to another cell of a Radio Access Technology (RAT) that is different from a RAT of the primary cell, by performing handover based on the RRC message,
wherein the information related to the occurrence of the failure in the cell associated with the master node includes information indicating a measurement result and information indicating a failure type,
wherein the RRC message relates to configuration of mobility from E-UTRA, and
wherein the measurement result includes a measResultFreqListNR, the measResultFreqListNR including a listing of best measured cells.