Apparatus and method of transmitting/receiving MBMS

• US 20060209870A1
• Filed: 12/23/2005
• Published: 09/21/2006
• Est. Priority Date: 02/15/2005
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Chun, Sung Duck, Lee, Young Dae, Jung, Myung Cheul
• Granted Patent: US 8,498,277 B2
• Time in Patent Office: Days
• US Class Current: 370/432
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0067 Rate matching H04L1/0013 and H04L1/08 take precedence
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• 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 76/40 for selective distribution or broadcast

Abstract

An apparatus and method of transmiting/receiving a multimedia broadcats/multicats service (MBMS) is disclosed. The present invention enables ARQ and HARQ to be aplied to the MBMS transmision, thereby enabling more efficient data transmision at a greater rate.

Claims

1. A method of providing a point-to-multipoint service to at least one mobile communication terminal in a mobile communications system, the method comprising:

the at least one mobile communications terminal storing a terminal identity and at least one point-to-multipoint service identity, the at least one point-to-multipoint service identity related to a service the terminal is to receive;

a network transmitting a frame of control information to the at least one mobile communications terminal via a downlink shared control channel, the control information comprising at least one of a mobile terminal identifier and a point-to-multipoint service identifier, the point-to-multipoint service identifier related to a service being provided;

the network transmitting a frame of data to the at least one mobile communications terminal via a downlink shared data channel, the frame of the data corresponding to the frame of control information;

the mobile terminal receiving the frame of control information and comparing the stored terminal identity and the stored point-to-multipoint service identity to the at least one of a mobile terminal identifier and a point-to-multipoint service identifier in the control information; and

the at least one mobile communications terminal receiving the frame of data if at least one of the stored terminal identity matches the terminal identifier in the control information and the stored point-to-multipoint service identity matches the point-to-multipoint service identifier in the control information.

2. The method of claim 1, wherein the downlink shared control channel is a downlink high speed-shared control channel (HS-SCCH).

3. The method of claim 1, wherein the downlink shared data channel is a high-speed physical downlink shared channel (HS-PDSCH).

4. The method of claim 1, wherein the frame of data is one of mobile communications terminal dedicated data and multicast data.

5. The method of claim 1, wherein the point-to-multipoint service identifier corresponds to a specific point-to-multipoint service.

6. The method of claim 1, wherein the point-to-multipoint service identifier corresponds to a specific session of a specific point-to-multipoint service.

7. The method of claim 1, wherein the point-to-multipoint service identifier corresponds to a plurality of mobile communication terminals that are to receive a specific point-to-multipoint service.

8. The method of claim 1, further comprising:

the at least one mobile communications terminal decoding the frame of data; and

the at least one mobile communications terminal transmitting reception status information to the network, the reception status information comprising an indication of one of the reception of the frame of data without errors and the reception of the frame of data with errors.

9. The method of claim 8, wherein the reception status information further comprises downlink channel quality information.

10. The method of claim 8, wherein the reception status information is transmitted via a sub-frame of a high speed-dedicated physical control channel (HS-DPCCH) that is mapped to a subframe of a high speed physical downlink shared channel (HS-PDSCH).

11. The method of claim 8, further comprising:

the at least one mobile communications terminal transmitting reception status information comprising an indication of reception of the frame of data with errors;

the network re-transmitting the frame of control information to the at least one mobile communications terminal via the downlink shared control channel, the control information comprising at least one of a mobile terminal identifier and a point-to-multipoint service identifier, the point-to-multipoint service identifier related to a service being provided;

the network re-transmitting a frame of data to the at least one mobile communications terminal via the downlink shared data channel, the frame of data corresponding to the frame of control information;

the mobile terminal receiving the re-transmitted frame of control data and comparing the stored terminal identity and the stored point-to-multipoint service identity to the at least one of a mobile terminal identifier and a point-to-multipoint service identifier in the control information; and

the at least one mobile communications terminal receiving the re-transmitted frame of data if at least one of the stored terminal identity matches the terminal identifier in the control information and the stored point-to-multipoint service identity matches the point-to-multipoint service identifier in the control information.

12. The method of claim 11, wherein the control information comprises a point-to-multipoint service identifier if a number of mobile communication terminals transmitting reception status information comprising an indication of reception of the frame of data with errors exceeds a threshold and the control information comprises a mobile terminal identifier of each terminal that transmitted reception status information comprising an indication of reception of the frame of data with errors if the number of mobile communication terminals transmitting reception status information comprising an indication of reception of the frame of data with errors does not exceed the threshold.

13. The method of claim 1, further comprising the at least one mobile communication terminal informing the network during a connection procedure whether it can receive the downlink shared control channel and the downlink shared data channel.

14. The method of claim 1, further comprising the network informing the at least one mobile communication terminal that the frame of control information will be transmitted via the downlink shared control channel and the frame of data will be transmitted via the downlink shared data channel.

15. The method of claim 1, wherein the point-to-multipoint service is a multimedia broadcast or multicast service (MBMS).

16. A method of providing a point-to-multipoint service to at least one mobile communication terminal in a mobile communications system, the method comprising:

(UE claim)

storing a terminal identity and at least one point-to-multipoint service identity, the at least one point-to-multipoint service identity related to a service to be received;

receiving a frame of control information via a downlink shared control channel, the control information comprising at least one of a mobile terminal identifier and a point-to-multipoint service identifier, the point-to-multipoint service identifier related to a service being provided;

comparing the stored terminal identity and the stored point-to-multipoint service identity to the at least one of a mobile terminal identifier and a point-to-multipoint service identifier in the control information; and

receiving a frame of data via a downlink shared data channel if at least one of the stored terminal identity matches the terminal identifier in the control information and the stored point-to-multipoint service identity matches the point-to-multipoint service identifier in the control information, the frame of the data corresponding to the frame of control information.

17. The method of claim 16, wherein the downlink shared control channel is a downlink high speed-shared control channel (HS-SCCH).

18. The method of claim 16, wherein the downlink shared data channel is a high-speed physical downlink shared channel (HS-PDSCH).

19. The method of claim 16, wherein the frame of data is one of mobile communications terminal dedicated data and multicast data.

20. The method of claim 16, further comprising:

decoding the frame of data; and

transmitting reception status information to the network, the reception status information comprising an indication of one of the reception of the frame of data without errors and the reception of the frame of data with errors.

21. The method of claim 20, wherein the reception status information further comprises downlink channel quality information.

22. The method of claim 20, wherein the reception status information is transmitted via a sub-frame of a high speed-dedicated physical control channel (HS-DPCCH) that is mapped to a subframe of a high speed physical downlink shared channel (HS-PDSCH).

23. The method of claim 20, further comprising:

transmitting reception status information comprising an indication of reception of the frame of data with errors;

receiving a re-transmitted frame of control information via the downlink shared control channel, the control information comprising at least one of a mobile terminal identifier and a point-to-multipoint service identifier, the point-to-multipoint service identifier related to a service being provided;

comparing the stored terminal identity and the stored point-to-multipoint service identity to the at least one of a mobile terminal identifier and a point-to-multipoint service identifier in the control information; and

receiving a re-transmitted frame of data via the downlink shared data channel if at least one of the stored terminal identity matches the terminal identifier in the control information and the stored point-to-multipoint service identity matches the point-to-multipoint service identifier in the control information.

24. The method of claim 16, further comprising informing the network during a connection procedure whether the downlink shared control channel and the downlink shared data channel may be received.

25. The method of claim 16, further comprising receiving an indication that the frame of control information will be transmitted via the downlink shared control channel and the frame of data will be transmitted via the downlink shared data channel.

26. The method of claim 16, wherein the point-to-multipoint service is a multimedia broadcast or multicast service (MBMS).

27. A method of providing a point-to-multipoint service to at least one mobile communication terminal in a mobile communications system, the method comprising:

transmitting a frame of control information to the at least one mobile communications terminal via a downlink shared control channel, the control information comprising at least one of a mobile terminal identifier and a point-to-multipoint service identifier, the point-to-multipoint service identifier related to a service being provided; and

transmitting a frame of data to the at least one mobile communications terminal via a downlink shared data channel, the frame of the data corresponding to the frame of control information.

28. The method of claim 27, wherein the downlink shared control channel is a downlink high speed-shared control channel (HS-SCCH).

29. The method of claim 27, wherein the downlink shared data channel is a high-speed physical downlink shared channel (HS-PDSCH).

30. The method of claim 27, wherein the frame of data is one of mobile communications terminal dedicated data and multicast data.

31. The method of claim 27, further comprising receiving reception status information from the at least one mobile communications terminal, the reception status information comprising an indication of one of the reception of the frame of data without errors and the reception of the frame of data with errors.

32. The method of claim 31, further comprising receiving downlink channel quality information.

33. The method of claim 31, wherein the reception status information is transmitted via a sub-frame of a high speed-dedicated physical control channel (HS-DPCCH) that is mapped to a subframe of a high speed physical downlink shared channel (HS-PDSCH).

34. The method of claim 31, further comprising:

receiving reception status information from the at least one mobile communications terminal, the reception status information comprising an indication of reception of the frame of data with errors;

re-transmitting the frame of control information to the at least one mobile communications terminal via the downlink shared control channel, the control information comprising at least one of a mobile terminal identifier and a point-to-multipoint service identifier, the point-to-multipoint service identifier related to a service being provided; and

re-transmitting the frame of data to the at least one mobile communications terminal via the downlink shared data channel, the frame of data corresponding to the frame of control information;

35. The method of claim 34, wherein the control information comprises a point-to-multipoint service identifier if a number of mobile communication terminals transmitting reception status information comprising an indication of reception of the frame of data with errors exceeds a threshold and the control information comprises a mobile terminal identifier of each terminal that transmitted reception status information comprising an indication of reception of the frame of data with errors if the number of mobile communication terminals transmitting reception status information comprising an indication of reception of the frame of data with errors does not exceed the threshold.

36. The method of claim 27, further comprising receiving an indication from the at least one mobile communication terminal whether the at least one mobile communication terminal can receive the downlink shared control channel and the downlink shared data channel, the indication received during a connection procedure.

37. The method of claim 27, further comprising informing the at least one mobile communication terminal that the frame of control information will be transmitted via the downlink shared control channel and frame of data will be transmitted via the downlink shared data channel.

38. The method of claim 27, wherein the point-to-multipoint service is a multimedia broadcast or multicast service (MBMS).

39. A mobile communication terminal for receiving a point-to-multipoint service in a mobile communications system, the mobile communication terminal comprising:

an antenna adapted to receive RF signals containing messages comprising a frame of control information and a frame of data;

an RF module adapted to process the RF signals received by the antenna;

a keypad adapted for inputting information from a user;

a storage unit adapted to store a terminal identity and at least one point-to-multipoint service identity, the at least one point-to-multipoint service identity related to a service to be received;

a display adapted to convey information to the user; and

a processing unit adapted to;

process the frame of control information received via a downlink shared control channel, the control information comprising at least one of a mobile terminal identifier and a point-to-multipoint service identifier, the point-to-multipoint service identifier related to a service being provided,

compare the stored terminal identity and the stored point-to-multipoint service identity to the at least one of a mobile terminal identifier and a point-to-multipoint service identifier in the control information, and

process the frame of data received via a downlink shared data channel if at least one of the stored terminal identity matches the terminal identifier in the control information and the stored point-to-multipoint service identity matches the point-to-multipoint service identifier in the control information, the frame of the data corresponding to the frame of control information.

40. The mobile communication terminal of claim 39, wherein the downlink shared control channel is a downlink high speed-shared control channel (HS-SCCH).

41. The mobile communication terminal of claim 39, wherein the downlink shared data channel is a high-speed physical downlink shared channel (HS-PDSCH).

42. The mobile communication terminal of claim 39, wherein the frame of data is one of mobile communications terminal dedicated data and multicast data.

43. The mobile communication terminal of claim 39, wherein the processing unit is further adapted to decode the frame of data and transmit reception status information to the network, the reception status information comprising an indication of one of the reception of the frame of data without errors and the reception of the frame of data with errors.

44. The mobile communication terminal of claim 43, wherein the processing unit is further adapted to generate the reception status information comprising downlink channel quality information.

45. The mobile communication terminal of claim 43, wherein the processing unit is further adapted to transmit the reception status information via a sub-frame of a high speed-dedicated physical control channel (HS-DPCCH) that is mapped to a subframe of a high speed physical downlink shared channel (HS-PDSCH).

46. The mobile communication terminal of claim 43, wherein the processing unit is further adapted to:

transmit reception status information comprising an indication of reception of the frame of data with errors;

process a re-transmitted frame of control information received via the downlink shared control channel, the control information comprising at least one of a mobile terminal identifier and a point-to-multipoint service identifier, the point-to-multipoint service identifier related to a service being provided;

compare the stored terminal identity and the stored point-to-multipoint service identity to the at least one of a mobile terminal identifier and a point-to-multipoint service identifier in the control information; and

process a re-transmitted frame of data received via the downlink shared data channel if at least one of the stored terminal identity matches the terminal identifier in the control information and the stored point-to-multipoint service identity matches the point-to-multipoint service identifier in the control information.

47. The mobile communication terminal of claim 39, wherein the processing unit is further adapted to inform the network during a connection procedure whether the downlink shared control channel and the downlink shared data channel may be received.

48. The mobile communication terminal of claim 39, wherein the processing unit is further adapted to process an indication that the frame of control information will be transmitted via the downlink shared control channel and the frame of data will be transmitted via the downlink shared data channel.

49. The mobile communication terminal of claim 39, wherein the point-to-multipoint service is a multimedia broadcast or multicast service (MBMS).

50. A network for providing a point-to-multipoint service to at least one mobile communication terminal in a mobile communications system, the network comprising:

a transmitter adapted to transmit signals containing a frame of control information and a frame of data to the at least one mobile communication terminal;

a receiver adapted to receive signals comprising reception status information and downlink channel quality information from the at least one mobile communications terminal; and

a controller adapted to;

transmit the frame of control information via a downlink shared control channel, the control information comprising at least one of a mobile terminal identifier and a point-to-multipoint service identifier, the point-to-multipoint service identifier related to a service being provided; and

transmit the frame of data via a downlink shared data channel, the frame of the data corresponding to the frame of control information.

51. The network of claim 50, wherein the downlink shared control channel is a downlink high speed-shared control channel (HS-SCCH).

52. The network of claim 50, wherein the downlink shared data channel is a high-speed physical downlink shared channel (HS-PDSCH).

53. The network of claim 50, wherein the controller is further adapted to generate the frame of data comprising one of mobile communications terminal dedicated data and multicast data.

54. The network of claim 50, wherein the controller is further adapted to process the reception status information, the reception status information comprising an indication of one of the reception of the frame of data without errors and the reception of the frame of data with errors.

55. The network of claim 54, wherein the controller is further adapted to process the downlink channel quality information.

56. The network of claim 54, wherein the controller is further adapted to process the reception status information received via a sub-frame of a high speed-dedicated physical control channel (HS-DPCCH) that is mapped to a subframe of a high speed physical downlink shared channel (HS-PDSCH).

57. The network of claim 54, wherein the controller is further adapted to:

process reception status information comprising an indication of reception of the frame of data with errors;

re-transmit the frame of control information to the at least one mobile communications terminal via the downlink shared control channel, the control information comprising at least one of a mobile terminal identifier and a point-to-multipoint service identifier, the point-to-multipoint service identifier related to a service being provided; and

re-transmit a frame of data to the at least one mobile communications terminal via the downlink shared data channel, the frame of data corresponding to the frame of control information;

58. The network of claim 57, wherein the controller is further adapted to generate the control information comprising a point-to-multipoint service identifier if a number of mobile communication terminals transmitting reception status information comprising an indication of reception of the frame of data with errors exceeds a threshold and to generate the control information comprising a mobile terminal identifier of each terminal that transmitted reception status information comprising an indication of reception of the frame of data with errors if the number of mobile communication terminals transmitting reception status information comprising an indication of reception of the frame of data with errors does not exceed the threshold.

59. The network of claim 50, wherein the controller is further adapted to process an indication from the at least one mobile communication terminal whether the at least one mobile communication terminal can receive the downlink shared control channel and the downlink shared data channel, the indication received during a connection procedure.

60. The network of claim 50, wherein the controller is further adapted to inform the at least one mobile communication terminal that the frame of control information will be transmitted via the downlink shared control channel and frame of data will be transmitted via the downlink shared data channel.

61. The network of claim 50, wherein the point-to-multipoint service is a multimedia broadcast or multicast service (MBMS).