US 11,700,665 B2
Communication system, base station device and communication terminal device
Tadahiro Shimoda, Tokyo (JP); and Mitsuru Mochizuki, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
Filed on Dec. 8, 2021, as Appl. No. 17/545,545.
Application 17/545,545 is a continuation of application No. 16/641,124, granted, now 11,234,286, previously published as PCT/JP2018/035876, filed on Sep. 27, 2018.
Claims priority of application No. 2017-186492 (JP), filed on Sep. 27, 2017.
Prior Publication US 2022/0104307 A1, Mar. 31, 2022
Int. Cl. H04W 76/27 (2018.01)
CPC H04W 76/27 (2018.02) 4 Claims
OG exemplary drawing
 
1. A communication system comprising:
a communication terminal device; and
a plurality of base station devices configured to perform radio communication with the communication terminal device, wherein
the plurality of base station devices include a master base station device and a secondary base station device that are configured to provide at least one bearer for the communication terminal device,
when the secondary base station device detects generation of downlink data for the communication terminal device being in an RRC_INACTIVE state, the secondary base station device notifies the master base station device of the generation of the downlink data,
when the master base station device receives the notification about the generation of the downlink data, the master base station device transmits paging to the communication terminal device, and
when the communication terminal device receives the paging, the communication terminal device transmits a request for restoration to an RRC_CONNECTED state to the master base station device,
the paging including at least one of
information about connection between the communication terminal device and the master base station device, and
information about connection between the communication terminal device and the secondary base station device.