Patent ID: 9173232
Filing Date: 2015-10-27
Classification: H04W

Abstract:
1. A method for a terminal to transmit and receive data with first base stations supporting a first radio access technology (RAT) and second base stations supporting a second RAT in a wireless access system supporting multi-RAT, the method performed by the terminal and comprising: transmitting and receiving data with one first base BS; performing a first scanning on at least one second BS; transmitting a first scan report message to the one first BS, the first scan report message indicating a result of the first scanning and the channel status value for the at least one second BS, wherein a timer is started after the first scan report message is received by the one first BS and the channel status value satisfies a specific criteria, the timer indicating a time for which the terminal waits for access to the at least one second BS; receiving a first message from the one first BS after expiration of the timer, the first message reinstructing scanning on the at least one second BS; performing a second scanning on the at least one second BS upon receiving the first message; transmitting a second first scan report message to the one first BS indicating a result of the second scanning; receiving a second message from the one first BS instructing access to one of the at least one second BS; performing an access procedure to the one of the at least one second BS according to the received second message; and transmitting and receiving data with the one of the least one second BS connected via the access procedure.