Method and apparatus for transceiving data using plurality of carriers in mobile communication system

Abstract

The present invention relates to a method and apparatus for performing a discontinuous reception (DRX) operation while transceiving data using a plurality of carriers in a mobile communication system. The communication method for a terminal according to one embodiment of the present invention comprises the steps of: receiving a control message, including setting information of a secondary serving cell (SCell) to be added and discontinuous reception setting information, from a primary serving cell (PCell); and applying, if the control message includes an indicator indicating that the first base station to which the SCell to be added belongs and the second base station to which the PCell belongs are different from each other, the DRX setting information to the serving cell of a first base station. According to one embodiment of the present invention, a discontinuous reception (DRX) operation is applied upon the occurrence of inter-base-station carrier aggregation, thus reducing the consumption of a battery.

The invention claimed is: 
     
       1. A communication method of performed by a terminal in a mobile communication system, the method comprising:
 receiving, from a primary serving cell (PCell), a control message configuring a second cell group, wherein the control message comprises a secondary serving cell (SCell) configuration information index for an SCell of the second cell group and discontinuous reception (DRX) configuration information; 
 applying , when an indicator indicating that a second base station for the SCell is different from a first base station for the PCell, the DRX configuration information to the SCell of the second cell group which is different from a first cell group to which the PCell belongs; 
 receiving a DRX media access layer control (MAC) control element (CE) associated with a DRX; 
 determiningidentifying whether the DRX MAC CE is received from on a serving cell in a non-primary set the second cell group; and 
 stopping, if after the DRX MAC CE is received from on the serving cell in the non-primary set second cell group, a DRX timer for the serving cell in the non-primary set second cell group. 
 
     
     
       2. The method of  claim 1 , further comprising applying, if the indicator does not exist, the DRX configuration information to the PCell. 
     
     
       3. The method of  claim 1 , further comprising stopping, if after the DRX MAC CE is received from on a serving cell in a primary set the first cell group, a DRX timer for the serving cell in the primary set first cell group. 
     
     
       4. The method of  claim 1 , wherein the DRX configuration information comprises at least one of an active time on duration timerand, a DRX inactivity timer, a DRX retransmission timer, a DRX cycle, or a DRX-cycle parameter DRX start offset. 
     
     
       5. A communication method of performed by a base station in a mobile communication system, the method comprising:
 transmitting, to a terminal, a control message configuring a second cell group, wherein the control message comprises a secondary serving cell (SCell) configuration information index for an SCell, of the second cell group and discontinuous reception (DRX) configuration information, and an indicator indicating that a second base station for the SCell is different from a first base station for the PCell; and 
 transmitting, to the terminal, a DRX media access layer control (MAC) control element (CE) associated with a DRX, 
 wherein the DRX configuration information is applied to the SCell of the second cell group which is different from a first cell group to which the PCell belongs. 
 
     
     
       6. The method of  claim 5 , wherein the DRX configuration information comprises at least one of an active time on duration timerand a DRX-cycle parameter, a DRX inactivity timer, a DRX retransmission timer, a DRX cycle, or a DRX start offset. 
     
     
       7. The method of  claim 5 , wherein the DRX configuration information is applied to the SCell according to the indicator. 
     
     
       8. The method of  claim 5 , wherein a DRX timer for a serving cell in a non-primary set the second cell group is stopped, if after the DRX MAC CE is received from transmitted on the serving cell in the non-primary set second cell group. 
     
     
       9. A terminal in a mobile communication system, the terminal comprising:
 a transceiver configured to transmit and receive a signal; and 
 at least one processor configured to:
 control receivingreceive, from a primary serving cell (PCell), a control message configuring a second cell group, wherein the control message comprises a secondary serving cell (SCell) configuration information index for an SCell of the second cell group and discontinuous reception (DRX) configuration information, 
 apply, if an indicator indicating that a second base station for the SCell is different from a first base station for the PCell, the DRX configuration information to the SCell of the second cell group which is different from a first cell group to which the PCell belongs, 
 control receivingreceive a DRX media access layer control (MAC) control element (CE) associated with a DRX, 
 determineidentify whether the DRX MAC CE is received from on a serving cell in a non-primary set the second cell group, and 
 stop, if after the DRX MAC CE is received from on the serving cell in the non-primary set second cell group, a DRX timer for the serving cell in the non-primary set second cell group. 
 
 
     
     
       10. The terminal of  claim 9 , wherein the at least one processor is further configured to control applying, if the indicator does not exist, the DRX configuration information to the PCell. 
     
     
       11. The terminal of  claim 9 , wherein the at least one processor is further configured to control stopping, if stop, after the DRX MAC CE is received from on a serving cell in a primary set the first cell group, a DRX timer for the serving cell in the primary set first cell group. 
     
     
       12. The terminal of  claim 9 , wherein the DRX configuration information comprises at least one of an active time on duration timerand, a DRX inactivity timer, a DRX retransmission timer, a DRX cycle, or a DRX-cycle parameter DRX start offset. 
     
     
       13. A base station in a mobile communication system, the base station comprising:
 a transceiver configured to transmit and receive a signal; and 
 at least one processor configured to:
 control transmittingtransmit, to a terminal, a control message configuring a second cell group, wherein the control message comprises a secondary serving cell (SCell) configuration information index for an SCell,of the second cell group and discontinuous reception (DRX) configuration information, and an indicator indicating that a second base station for 
 transmit, to the terminal, a media access control (MAC) control element (CE) associated with a DRX, 
 
 wherein the DRX configuration information is applied to the SCell of the second cell group which is different from a first base station cell group to which the PCell, and control transmitting a DRX media access layer (MAC) control element (CE) belongs. 
 
     
     
       14. The base station of  claim 13 , wherein the DRX configuration information comprises at least one of an active time on duration timerand, a DRX-cycle parameter DRX inactivity timer, a DRX retransmission timer, a DRX cycle, or a DRX start offset. 
     
     
       15. The base station of  claim 13 , wherein the DRX configuration information is applied to the SCell according to the indicator. 
     
     
       16. The base station of  claim 13 , wherein a DRX timer for a serving cell in a non-primary set the second cell group is stopped, if after the DRX MAC CE is received from transmitted on the serving cell in the non-primary set second cell group. 
     
     
       17. A method performed by a terminal in a communication system, the method comprising:
 receiving, from a primary cell (PCell), a control message configuring a second cell group, wherein the control message comprises a secondary cell (SCell) index for an SCell of the second cell group and discontinuous reception (DRX) configuration information;   applying the DRX configuration information to the SCell of the second cell group which is different from a first cell group to which the PCell belongs;   transmitting a scheduling request;   identifying whether the scheduling request is transmitted on a serving cell in the second cell group; and   monitoring, after the scheduling request is transmitted on the serving cell in the second cell group, a physical downlink control channel (PDCCH) of the serving cell in the second cell group.    
     
     
       18. The method of  claim 17 , further comprising:
 receiving, on the serving cell in the second cell group, a physical downlink control channel (PDCCH) indicating a new transmission, wherein the PDCCH indicating the new transmission is received for the serving cell of the second cell group; and   starting, after the PDCCH indicating the new transmission is received for the serving cell of the second cell group, a DRX inactivity timer configured for the second cell group of the serving cell.    
     
     
       19. The method of  claim 17 , wherein the DRX configuration information comprises at least one of an on duration timer, a DRX inactivity timer, a DRX retransmission timer, a DRX cycle, or a DRX start offset.  
     
     
       20. A terminal in a communication system, the terminal comprising:
 a transceiver configured to transmit and receive a signal; and   at least one processor configured to:
 receive, from a primary cell (PCell), a control message configuring a second cell group, wherein the control message comprises a secondary cell (SCell) index for an SCell of the second cell group and discontinuous reception (DRX) configuration information, 
 apply the DRX configuration information to the SCell of the second cell group which is different from a first cell group to which the PCell belongs, 
 transmit a scheduling request, 
 identify whether the scheduling request is transmitted on a serving cell in the second cell group, and 
 monitor, after the scheduling request is transmitted on the serving cell in the second cell group, a physical downlink control channel (PDCCH) of the serving cell in the second cell group.  
   
     
     
       21. The terminal of  claim 20 , wherein the at least one processor is further configured to:
 receive, on the serving cell in the second cell group, a physical downlink control channel (PDCCH) indicating a new transmission,   identify whether the PDCCH indicating the new transmission is received for the serving cell of the second cell group, and   start, after the PDCCH indicating the new transmission is received for the serving cell of the second cell group, a DRX inactivity timer configured for the second cell group of the serving cell.    
     
     
       22. The terminal of  claim 20 , wherein the DRX configuration information comprises at least one of an on duration timer, a DRX inactivity timer, a DRX retransmission timer, a DRX cycle, or a DRX start offset.  
     
     
       23. A method performed by a terminal in a communication system, the method comprising:
 receiving, from a primary cell (PCell), a control message configuring a second cell group, wherein the control message comprises a secondary cell (SCell) index for an SCell of the second cell group and discontinuous reception (DRX) configuration information;   applying the DRX configuration information to the SCell of the second cell group which is different from a first cell group to which the PCell belongs;   transmitting a contention free random access preamble;   receiving a random access response for the contention free random access preamble;   identifying whether the contention free random access preamble is transmitted on a serving cell in the second cell group; and   monitoring, after the random access response is received for the contention free random access preamble being transmitted on the serving cell in the second cell group, a physical downlink control channel (PDCCH) of the serving cell in the second cell group until a PDCCH indicating a new transmission is received.    
     
     
       24. The method of  claim 23 , wherein the PDCCH indicating the new transmission is addressed to a cell radio network temporary identifier (C-RNTI) of the second cell group.  
     
     
       25. The method of  claim 23 , wherein the DRX configuration information comprises at least one of an on duration timer, a DRX inactivity timer, a DRX retransmission timer, a DRX cycle, or a DRX start offset.  
     
     
       26. A terminal in a communication system, the terminal comprising:
 a transceiver configured to transmit and receive a signal; and   at least one processor configured to:
 receive, from a primary cell (PCell), a control message configuring a second cell group, wherein the control message comprises a secondary cell (SCell) index for an SCell of the second cell group and discontinuous reception (DRX) configuration information, 
 apply the DRX configuration information to the SCell of the second cell group which is different from a first cell group to which the PCell belongs, 
 transmit a contention free random access preamble, 
 receive a random access response for the contention free random access preamble, 
 identify whether the contention free random access preamble is transmitted on a serving cell in the second cell group, and 
 monitor, after the random access response is received for the contention free random access preamble being transmitted on the serving cell in the second cell group, a physical downlink control channel (PDCCH) of the serving cell in the second cell group until a PDCCH indicating a new transmission is received.  
   
     
     
       27. The terminal of  claim 26 , wherein the PDCCH indicating the new transmission is addressed to a cell radio network temporary identifier (C-RNTI) of the second cell group.  
     
     
       28. The terminal of  claim 26 , wherein the DRX configuration information comprises at least one of an on duration timer, a DRX inactivity timer, a DRX retransmission timer, a DRX cycle, or a DRX start offset.