Selective Uplink Transmission Timing Adjustment of a Multicarrier Wireless Device

摘要

A plurality of timing advance groups (TAGs) comprises a first TAG and a second TAG. Uplink transmission timing in the first TAG is derived employing a first cell in the first TAG. The second TAG comprises a first unlicensed cell and a second unlicensed cell. Uplink transmission timing in the second TAG is derived employing at least a first signal received on the first unlicensed cell and a second signal received on the second unlicensed cell.

主权项

1. A method comprising:
receiving, by a wireless device, at least one control message comprising:
configuration parameters of a plurality of cells grouped into a plurality of timing advance groups (TAGs) comprising:
a first TAG comprising a first subset of the plurality of cells, uplink transmission timing in the first TAG derived employing a first cell in the first TAG; anda second TAG comprising a first unlicensed cell and a second unlicensed cell, uplink transmission timing in the second TAG derived employing at least:
a first signal received on the first unlicensed cell; anda second signal received on the second unlicensed cell; receiving a timing advance command (TAC) comprising a time adjustment value and a TAG index; and applying the TAC to uplink transmission timing in one of the first TAG or the second TAG that corresponds to the TAG index.