Patent ID: 9622225
Date: 2017-04-11
CPC Classifications: H04L,H04W

Claim:
1. A method for transmitting and receiving a signal by a terminal over a network in a wireless communication system, the method comprising: receiving a downlink signal from the network through a downlink cell and transmitting an uplink signal to the network through a first uplink cell; receiving a specific message for changing the first uplink cell to a second uplink cell from the network; changing the first uplink cell to the second uplink cell according to the specific message and transmitting the uplink signal to the network through the second uplink cell; performing a random access procedure with the second uplink cell during an operation time of a timer when the first uplink cell is changed to the second uplink cell; and re-changing the second uplink cell to the first uplink cell when the random access procedure is not terminated before the timer expires, wherein when the first uplink cell is changed to the second uplink cell, the downlink cell is maintained.