Patent ID: 11963251
Assignee: NTT DOCOMO, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. A communication system comprising:
a user device; and
a Central Unit Control Plane (CU-CP) and a Central Unit User Plane (CU-UP) connected to a Distributed Unit (DU) and the user device,
wherein the CU-CP includes a management unit configured to acquire information regarding a Packet Data Convergence Protocol (PDCP) layer which is terminated in a C-plane between the user device and the CU-CP via the DU,
wherein the CU-UP includes a management unit configured to acquire information regarding a PDCP layer terminated in a U-plane between the user device and the CU-UP via the DU,
wherein the DU includes:
a reception unit configured to receive information regarding a Radio Resource Control (RRC) layer terminated in a C-plane from the CU-CP; and
a control unit configured to acquire an RRC reconfiguration complete indicator from the information regarding the RRC layer terminated in a C-plane,

wherein the information regarding the RRC layer terminated in a C-plane at least includes the RRC reconfiguration complete indicator, the RRC reconfiguration complete indicator indicating whether the user device has completed configuration of the RRC layer, and
wherein the CU-UP includes a service data adaptation protocol (SDAP) layer.