Patent ID: 8761047

Claim:
A random access method of a terminal, the method comprising: determining whether a Scheduling Request (SR) is pending; determining, when the SR is pending, whether an uplink transmission resource is available in a current Transmission Time Interval (TTI); determining, when the uplink transmission resource is not available, whether a Physical Uplink Control Channel (PUCCH) resource is configured to transmit the SR; initiating, when the PUCCH resource is not configured, a random access process in a primary cell; determining, when the PUCCH resource is configured, whether the PUCCH resource is configured to transmit the SR in the current TTI, whether the current TTI is not a part of a measurement gap and whether a timer is not running; comparing, when the PUCCH resource is configured to transmit the SR in the current TTI and the current TTI is not a part of measurement gap and a timer not running, an SR transmission times counter with a threshold value of SR transmission; and initiating, when the SR transmission times counter is equal to or greater than the threshold value of SR transmission, the random access process in the primary cell.