US Patent No. 10,117,209

UPLINK SIGNAL TRANSMISSION IN CARRIER AGGREGATION


Patent No. 10,117,209
Issue Date October 30, 2018
Title Uplink Signal Transmission In Carrier Aggregation
Inventorship Esmael Hejazi Dinan, Herndon, VA (US)
Assignee Ofinno Technologies, LLC, Herndon, VA (US)

Claim of US Patent No. 10,117,209

1. A method comprising:receiving at least one message comprising configuration parameters of a plurality of cells, wherein:
the plurality of cells are grouped into a plurality of timing advance groups (TAGs); and
the plurality of cells comprise:
a primary cell with a primary physical uplink control channel (PUCCH); and
a PUCCH secondary cell with a secondary PUCCH, wherein the PUCCH secondary cell is in a first TAG in the plurality of TAGs;
receiving, in a first subframe, a random access response comprising a timing advance command (TAC) associated with the first TAG;
starting transmission of uplink signals via the first TAG on or before a second subframe that is four subframes after the first subframe; and
starting transmission of valid channel state information (CSI) via the PUCCH secondary cell on or after a third subframe that is six subframes after the first subframe.