US Patent No. 10,117,208

METHOD FOR DETERMINING UPLINK TRANSMISSION TIMING OF TERMINAL HAVING PLURALITY OF CELLS CONFIGURED THEREIN IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS USING THE METHOD


Patent No. 10,117,208
Issue Date October 30, 2018
Title Method For Determining Uplink Transmission Timing Of Terminal Having Plurality Of Cells Configured Therein In Wireless Communication System, And Apparatus Using The Method
Inventorship Dongyoun Seo, Seoul (KR)
Joonkui Ahn, Seoul (KR)
Yunjung Yi, Seoul (KR)
Bonghoe Kim, Seoul (KR)
Daesung Hwang, Seoul (KR)
Assignee LG Electronics Inc., Seoul (KR)

Claim of US Patent No. 10,117,208

1. A method for determining an uplink transmission timing of a user equipment configured with a plurality of cells in a wireless communication system, the method comprising:receiving timing advance (TA) configuration information; and
upon reception of the TA configuration information, determining an uplink transmission time for each of two cells among the plurality of cells,
wherein the two cells are included in a group, and wherein:
i) when the two cells are a first cell using a frequency division duplex (FDD) frame structure and a second cell using a time division duplex (TDD) frame structure, and when the group includes only secondary cells, both the uplink transmission time of the first cell and the uplink transmission time of the second cell are determined by applying a same offset value regardless of the frame structures of the first cell and the second cell, and the same offset value is an offset value applied to a cell using the TDD frame structure, and
ii) when the two cells are the first cell using an FDD frame structure and the second cell using a TDD frame structure and when the group includes a primary cell, an uplink transmission time of the primary cell is determined on the basis of the TA configuration information, and both the uplink transmission time of the first cell and the uplink transmission time of the second cell are determined to be the same as the uplink transmission time of the primary cell.