US Patent No. 10,925,106

MOBILE COMMUNICATION SYSTEM, CONTROL APPARATUS, BASE STATION, AND USER TERMINAL SUPPORTING DUAL CONNECTIVITY


Patent No. 10,925,106
Issue Date February 16, 2021
Title Mobile Communication System, Control Apparatus, Base Station, And User Terminal Supporting Dual Connectivity
Inventorship Masato Fujishiro, Yokohama (JP)
Yushi Nagasaka, Yokohama (JP)
Henry Chang, San Diego, CA (US)
Assignee KYOCERA Corporation, Kyoto (JP)

Claim of US Patent No. 10,925,106

1. A master base station used in dual connectivity operation where a user equipment is connected to the master base station and a secondary base station, comprising:a processor and a memory, wherein
the processor is configured to receive capability information from the user equipment,
the capability information indicates whether the user equipment supports a SCG (Secondary Cell Group) bearer and whether the user equipment supports a split bearer,
the SCG bearer is a bearer whose radio protocols are only located in the secondary base station,
the split bearer is a bearer whose radio protocols are located in both the master base station and the secondary base station, and which is split in a PDCP (Packet Data Convergence Protocol) layer of the master base station,
one split path of the split bearer goes via the secondary base station,
another split path of the split bearer does not go via the secondary base station and goes via the master base station, and
the processor is configured to configure either the SCG bearer or the split bearer to the user equipment without simultaneously configuring both the SCG bearer and the split bearer to the user equipment.