摘要 |
A method of handling uplink time alignment for a communication device in a wireless communication system is disclosed. The method comprises being configured a primary cell and at least a secondary cell by a network of the wireless communication system, transmitting a random access preamble of a random access procedure on the secondary cell when one of the at least a secondary cell is activated, and receiving a random access response including a timing advance command for the secondary cell on the primary cell, the secondary cell, or another one of the at least a secondary cells.
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