CPC H04W 56/0005 (2013.01) [H04W 16/14 (2013.01)] | 20 Claims |
1. A method comprising:
receiving, by a wireless device, configuration parameters of timing advance groups (TAGs) comprising:
a primary TAG comprising a primary cell; and
a secondary TAG comprising one or more licensed secondary cells and one or more unlicensed secondary cells; and
transmitting uplink signals via the secondary TAG with transmission timing derived employing a first secondary cell, of the secondary TAG, that is based on the first secondary cell being:
an activated secondary cell; and
a licensed secondary cell.
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