Paging apparatus and method in a mobile communication system providing multimedia broadcast service

Abstract

A paging apparatus and method in a mobile communication system providing an MBMS (Multimedia Broadcast Multicast Service). In the mobile communication system, to page a UE for a first service through a primary carrier during a second service in progress through a secondary carrier, a PICH (Paging Indication Channel) transmitter in a Node B transmits paging indication information to the UE through the primary carrier by oscillating the primary carrier as a transmission frequency. A PCH (Paging Channel) transmitter transmits paging information to the UE through the primary carrier or the secondary carrier by oscillating the primary carrier or the secondary carrier as the transmission frequency under a predetermined control. A PBMSCH (Physical Broadcast Multicast Shared Channel) transmitter transmits data of the second service through the secondary carrier by oscillating the secondary carrier as the transmission frequency. A controller controls the primary carrier or the secondary carrier to be oscillated as the transmission frequency of the PCH transmitter if the paging indication information indicates paging.

What is claimed is: 
     
       1. A method 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, the method comprising:
 providing, to the UE, the first service through a primary carrier; 
 providing, to the UE, the second service through a secondary carrier having a different frequency from the primary carrier; 
 receiving, by the UE, paging indication information for the first service through the secondary carrier while receiving the second service through the secondary carrier; 
 receiving, by the UE, paging information for the first service through the secondary carrier in response to the received paging indication information; and 
 receiving, by the UE, 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, 
 wherein the UE reads the primary carrier based on the paging information received through the secondary carrier. 
 
     
     
       2. The method of  claim 1 , wherein the first service has a higher priority than the second service. 
     
     
       3. The method of  claim 1 , wherein the paging information is transmitted to UEs that are receiving the second service. 
     
     
       4. A method 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, the method comprising:
 providing, to the UE, the first service through a primary carrier; 
 providing, to the UE, the second service through a secondary carrier having a different frequency from the primary carrier; 
 receiving paging information for the first service through the secondary carrier while receiving the second service through the secondary carrier; and 
 receiving 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, 
 wherein the UE reads the primary carrier based on the paging information received through the secondary carrier. 
 
     
     
       5. The method of  claim 4 , wherein the first service has a higher priority than the second service. 
     
     
       6. The method of  claim 4 , wherein the paging information is transmitted to UEs that are receiving the second service. 
     
     
       7. 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 after a reception frequency of the UE is switched from the secondary carrier to the primary carrier in response to the paging information received through the secondary carrier; and 
 a controller for controlling adapted to switch the reception frequency between the primary carrier or and the secondary carrier to be oscillated as the reception frequency of the first receiver if the UE receives, based on the paging information, 
 wherein the UE reads the primary carrier based on the paging information received through the secondary carrier. 
 
     
     
       8. The method of  claim 7 , wherein the paging information is transmitted to UEs that are receiving the second service. 
     
     
       9. An apparatus for receiving paging for a first service at a User Equipment (UE) while a second service, which is different from the first service, is in progress in a mobile communication system, wherein the first service is provided through a primary carrier, the second service is provided through a secondary carrier, and the secondary carrier has a different frequency than the primary carrier, the apparatus comprising:
 an oscillator;   a first receiver configured to receive paging information for the first service through the secondary carrier while receiving the second service through the secondary carrier;   a second receiver configured to receive the first service through the primary carrier, after a reception frequency of the UE is switched from the secondary carrier to the primary carrier, in response to the paging information received through the secondary carrier; and   a controller configured to control the oscillator to switch the reception frequency between the primary carrier and the secondary carrier, based on the paging information.