Method, apparatus, device and network system for adding secondary serving cell
摘要
說明書
Specifically, the secondary base station receives the serial number of the random access preamble code and the serial number of the physical random access channel mask code sent by the primary base station.
Step 2302: The secondary base station receives, according to the secondary serving cell addition request message, a random access request message that is sent by a terminal and carries the random access preamble code obtained according to the serial number of the random access preamble code.
Specifically, the secondary base station receives, according to the serial number of the random access preamble code and the serial number of the physical random access channel mask code sent by the primary base station, the random access request message sent by the terminal, where the random access preamble code included in the random access request message is determined by the serial number of the random access preamble code.
Step 2303: The secondary base station obtains a time advance command TAC according to the random access request message, and sends, to the terminal, a random access response message that carries the TAC, so that the terminal adjusts, according to the TAC, time advance TA of the terminal on a secondary serving cell corresponding to the secondary base station.
Specifically, the secondary base station determines the time advance command TAC according to the received random access request message, and sends the time advance command TAC to the terminal. The terminal adjusts, according to the TAC, time advance TA of the terminal on a corresponding cell.
