US Patent No. 10,368,328

ENHANCED MECHANISM OF UPLINK TIME ALIGNMENT MAINTENANCE FOR INTER-ENB CARRIER AGGREGATION


Patent No. 10,368,328
Issue Date July 30, 2019
Title Enhanced Mechanism Of Uplink Time Alignment Maintenance For Inter-enb Carrier Aggregation
Inventorship Yuanyuan Zhang, Beijing (CN)
Per Johan Mikael Johansson, Kungsangen (SE)
Li Chen, Beijing (CN)
Assignee HFI innovation INC., HsinChu (TW)

Claim of US Patent No. 10,368,328

1. A method comprising:detecting an inter-eNB carrier aggregation configuration by a user equipment (UE) in a wireless network with serving cells served by a first and a second base station, wherein each serving cell is configured with an uplink group identifier;
determining a first cell group with a first cell group identifier and a second cell group with a second cell group identifier, wherein the first cell group containing one or more serving cells with the same or different uplink group identifiers served by the first base station and the second cell group with the second cell group identifier containing one or more serving cells with the same or different uplink group identifiers served by the second base station, and wherein the uplink group identifier is associated with a time advancing group and the group identifier is associated with a group TAG, and wherein each TAG associates with the same base station belongs to the same group TAG, and wherein each TAG has a time advance timer (TAT); and
performing uplink alignment, monitoring and management procedures linking to the first or the second cell group identifier.