Terminal, Base Station, Cell Access Method, and Data Transmission Method for Reconfiguring a Wireless Connection to Communicate with a Secondary Cell

A method, comprising:

• communicating, by a terminal with a first cell of a first base station;
• establishing, by the terminal, a wireless connection with a second cell of a second base station;
• accessing, by the terminal, the second cell via the wireless connection;
• receiving, by the terminal, a reconfiguration message from a first base station of the first cell, wherein the reconfiguration message is sent by the first base station to the terminal in response to the first base station determining that the second base station allows the second cell to be added as a cell communicating with the terminal;
• reconfiguring the wireless connection according to the reconfiguration message.

An apparatus, comprising:

• a processor;
• and
• a non-transitory computer readable medium having a program stored thereon for execution by the processor, the program having instructions for:
• communicating, as a first bastion, with a terminal in a first cell;
• receiving, from a second base station of a second cell, a terminal access indication message indicating that the terminal accesses the second cell;
• receiving, from the second base station, an acknowledgement message indicating that the second base station the second cell to be added as a cell communicating with the terminal;
• and
• sending, to the terminal, a reconfiguration message causing the terminal to reconfigure a wireless connection according to the reconfiguration message and communicate with the second cell on the reconfigured wireless connection.