Method for receiving multicast data and apparatus thereof

1. A method for receiving multicast data by a terminal, the method comprising:

starting a single cell-point to multipoint (SC-PTM) onduration timer (onDurationTimer) by a medium access control (MAC) entity of a terminal when discontinuous reception (DRX) is configured for a group-radio network temporary identifier (G-RNTI) wherein the SC-PTM onduration timer is defined for starting an active time for receiving single cell multicast traffic channel (SC-MTCH), and the G-RNTI is an identifier defined for receiving SC-MTCH;

monitoring a physical downlink control channel (PDCCH) during an active time;

controlling at least one of the SC-PTM onduration timer and the SC-PTM inactivity timer (InactivityTimer) when the PDCCH includes information indicating downlink transmission; and

repeatedly receiving the multicast data through a physical downlink shared channel (PDSCH) of one or more subframes.

2. The method according to claim 1 , wherein the active time is a time while at least one of a SC-PTM onduration timer and an SC-PTM inactivity timer is running.

3. The method according to claim 1 , wherein the controlling comprises: stopping the SC-PTM onduration timer and the SC-PTM inactivity timer.

4. The method according to claim 3 , wherein the terminal is set to access a network service whose channel bandwidth is restricted to 200 kHz or lower.

5. The method according to claim 1 , wherein the controlling comprises starting or restarting the SC-PTM inactivity timer.

6. The method according to claim 5 , wherein the terminal is set to operate in a bandwidth restricted to six physical resource blocks (PRBs).

7. The method according to claim 5 , wherein the controlling comprises, starting or restarting the SC-PTM inactivity timer in a last subframe in which the multicast data is repeatedly received.

8. The method according to claim 1 , wherein:

the SC-PTM onduration timer and the SC-PTM inactivity timer are received through the PDSCH according to a decoding result of the PDCCH, which is indicated according to single cell-multicast control channel (SC-MCCH) scheduling information; and

the SC-MCCH scheduling information is received through system information.

9. The method according to claim 8 , wherein the PDCCH indicated according to the SC-MCCH scheduling information includes change notification information for notifying change in multicast control information.

10. The method according to claim 9 , wherein the change notification information is decoded through single cell-radio network temporary identifier (SC-RNTI).

11. The method according to claim 9 , wherein the change notification information is configured by one bit.

12. The method according to claim 8 , wherein the terminal is set to access a network service whose channel bandwidth is restricted to 200 kHz or lower or set to operate in a bandwidth restricted to six PRBs.

13. A terminal for receiving multicast data, the terminal comprising:

a processor comprising a control unit configured to i) start a single cell-point multipoint (SC-PTM) onduration timer through a medium access control (MAC) when discontinuous reception (DRX) is configured for group radio network temporary identifier (G-RNTI), ii) monitor a physical downlink control channel (PDCCH) during the active time, and iii) control at least one of the SC-PTM onduration timer and a SC-PTM inactivity timer when the PDCCH includes information indicating downlink transmission wherein the SC-PTM onduration timer is defined for starting an active time for receiving single cell multicast traffic channel (SC-MTCH), and the G-RNTI is an identifier defined for receiving SC-MTCH; and

a receiving unit configured to be controlled by the processor and repeatedly receive the multicast data through at least one subframe of a physical downlink shared channel (PDSCH).

14. The terminal according to claim 13 , wherein the active time is a time while one of the SC-PTM onduration timer and the SC-PTM inactivity timer is running.

15. The terminal according to claim 13 , wherein when the terminal is set to access a network service whose channel bandwidth is restricted to 200 kHz or lower, if the PDCCH includes information indicating downlink transmission, the control unit stops operations of the SC-PTM onduration timer and the SC-PTM inactivity timer.

16. The terminal according to claim 13 , wherein when the terminal is set to operate in a bandwidth restricted to six physical resource blocks PRBs, if the PDCCH includes information indicating downlink transmission, the control unit starts or restarts the SC-PTM inactivity timer.

17. The terminal according to claim 16 , wherein the control unit starts or restarts the SC-PTM inactivity timer in a last subframe in which the multicast data is repeatedly received.

18. The terminal according to claim 13 , wherein:

the SC-PTM onduration timer and the SC-PTM inactivity timer are received through the PDSCH according to a decoding result of the PDCCH indicated according to single cell-multicast control channel (SC-MCCH) scheduling information; and

the SC-MCCH scheduling information is received through system information.

19. The terminal according to claim 18 , wherein the PDCCH indicated according to the SC-MCCH scheduling information includes change notification information for notifying change in multicast control information.

20. The terminal according to claim 19 , wherein the change notification information is decoded through single cell-radio network temporary identifier (SC-RNTI).