METHOD OF RECEIVING MULTIMEDIA BROADCAST/MULTICAST SERVICE IN CELL-BASED WIRELESS COMMUNICATION SYSTEM

• US 20110222457A1
• Filed: 03/12/2010
• Published: 09/15/2011
• Est. Priority Date: 03/13/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yi, SeungJune, Chun, SungDuck, Park, Sung Jun, Lee, Young Dae
• Granted Patent: US 8,913,538 B2
• Time in Patent Office: Days
• US Class Current: 370/312
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information

Abstract

A method of receiving multimedia broadcast/multicast service (MBMS) information by a user equipment (UE) in a cell-based wireless communication system is provided. The method includes receiving information regarding a second cell from a first cell over a first channel, and receiving the MBMS information from the second cell over a second channel based on the received information regarding the second cell. Information regarding a cell that transmits multimedia broadcast/multicast service (MBMS) information is obtained from a cell that does not transmit the MBMS information, thereby eventually receiving the MBMS information. Therefore, an overhead caused by broadcasting of unnecessary MBMS control information can be reduced.

Claims

1. A method of receiving multimedia broadcast/multicast service (MBMS) information by a user equipment (UE) in a wireless communication system, the method comprising:

receiving information on a second cell from a first cell over a first channel; and

receiving the MBMS information from the second cell over a second channel based on the received information on the second cell,

wherein the first cell provides a unicast service and the second cell provides an MBMS service,

wherein the MBMS information is information on MBMS transmission of the second cell, and

wherein the first channel is related to the unicast service.

2. The method of claim 1, wherein the first channel is a broadcast channel.

3. The method of claim 1, wherein the first channel is a paging channel (PCH).

4. The method of claim 1, wherein the second channel is at least one of a physical downlink control channel (PDCCH), an MBMS control channel (MCCH), and an MBMS traffic channel (MTCH).

5. The method of claim 4, wherein the PDCCH comprises an MBMS-radio network temporary identifier (M-RNTI).

6. The method of claim 1, wherein the MBMS information is received by using a discontinuous reception (DRX) scheme.

7. The method of claim 6, wherein the MBMS information is received in a duration in which the unicast service is not transmitted from the first cell.

8. The method of claim 6, wherein the MBMS information is received in a duration in which a paging message is not transmitted from the first cell.

9. The method of claim 1, wherein a first frequency band allocated to the first cell is different from a second frequency band allocated to the second cell.

10. The method of claim 9, wherein a first carrier is used in the first frequency band, a second carrier is used in the second frequency band, and the first carrier and the second carrier are transmitted by carrier aggregation.

11. The method of claim 10, wherein receiving the MBMS information from the second cell is performed irrespective of an inter-frequency handover from the first carrier to the second carrier.

12. The method of claim 10, further comprising, before receiving the information on the second cell, transmitting, to the first cell, MBMS capability information indicating whether the MBMS service is supported by the UE and carrier aggregation capability information indicating whether reception based on the carrier aggregation is supported by the UE.

13. The method of claim 12, wherein the information on the second cell is included in a radio resource control (RRC) configuration message, and the RRC configuration message further comprises carrier aggregation configuration information for configuring the first carrier and the second carrier by using carrier aggregation.

14. The method of claim 1, wherein the first cell and the second cell are co-located.

15. A method of transmitting multimedia broadcast/multicast service (MBMS) information from a radio access network in a wireless communication system, the method comprising:

transmitting information on a second cell to a user equipment (UE) over a first channel of a first cell; and

transmitting the MBMS information to the UE over a second channel of the second cell, in association with the transmitted information on the second cell,

wherein the first cell is provides a unicast service, the second cell provides an MBMS service,

wherein the MBMS information is information on MBMS transmission of the second cell, and wherein the first channel is related to the unicast service.

16. The method of claim 15, wherein the information on the second cell is included in system information of the first cell.

17. The method of claim 16, wherein the system information comprises an identifier for identifying the second cell as a cell that provides the MBMS service.

18. The method of claim 15, wherein the information on the second cell is included in a paging message of the first cell.

19. The method of claim 15, wherein the information on the second cell is included in a physical downlink control channel (PDCCH) of the first cell.

20. The method of claim 19, wherein the PDCCH of the first cell comprises an MBMS-radio network temporary identifier (M-RNTI).