Patent ID: 8571054

Claim:
A method for controlling a user equipment (UE) configured to receive a point-to-multipoint service in a wireless communication system, the method performed by the UE and comprising: receiving the point-to-multipoint service; completing the reception of the point-to-multipoint service by releasing a point-to-multipoint radio bearer; and performing a cell reselection based on control information received from a base station after the completion of the reception of the point-to-multipoint service, wherein the control information includes a first parameter associated with measurement between frequencies and a second parameter associated with measurement within a frequency, wherein performing the cell reselection comprises: selecting a frequency randomly from among a plurality of frequencies using the control information; and selecting a suitable cell within the selected frequency, wherein the point-to-multipoint service is received based on a frequency indicated by the control information, wherein the cell reselection is performed when the UE decides to no longer receive the point-to-multipoint service, wherein the cell reselection is performed among multiple frequencies without measuring all candidate frequencies, wherein the control information further includes frequency layer convergence (FLC) information, wherein the FLC information indicates at least one preferred frequency, wherein the FLC information includes an offset to be applied to the at least one preferred frequency, and wherein the offset is added to a quality measurement value of a cell positioned at the preferred frequency for comparing the cell with another cell during the cell reselection.