An apparatus of receiving, at a UE (User Equipment), paging for a first service while a second service, different from the first service, is in progress in a mobile communication system, wherein the first service is provided through a primary carrier and the second service is provided through a secondary carrier, the secondary carrier having a different frequency from the primary carrier, the apparatus comprising:
- a first receiver being adapted to receive paging information for the first service through the secondary carrier while receiving the second service through the secondary carrier by oscillating the primary carrier or the secondary carrier as a reception frequency;
- a second receiver being adapted to receive the first service through the primary carrier by switching a reception frequency of the UE from the secondary carrier to the primary carrier in response to the paging information received through the secondary carrier;
- and
- a controller for controlling the primary carrier or the secondary carrier to be oscillated as the reception frequency of the first receiver if the UE receives paging information,
- wherein the UE reads the primary carrier based on the paging information received through the secondary carrier.