Patent ID: 8724491

Claim:
A method of measuring a cell at a User Equipment (UE) using a plurality of frequencies in a wireless communication system, the method comprising: receiving measurement configuration information about the plurality of frequencies from a network when the UE has no dedicated connection with the network, wherein the measurement configuration information includes a cell list for the UE to measure cells, the cell list including a first cell camped on by the UE and at least one second cell different from the first cell, and wherein the first cell is associated with a first frequency and the at least one second cell is associated with at least one second frequency; measuring cells associated with the plurality of frequencies according to the measurement configuration information before the UE transmits any connection request; transmitting a measurement result report of the measured cells to the network by using the first frequency; and receiving channel configuration information related to the first frequency defined as a primary uplink frequency, wherein the measurement configuration information further includes information about the number of cells to be reported, and wherein, if the number of measured cells is larger than the number of cells to be reported, the measurement result report comprises one or more measurement results as many as the number of cells to be reported in a descending order of radio quality.