Method of controlling data transmission for multimedia and broadcasting services in a broadband wireless access system

• US 7,986,633 B2
• Filed: 08/26/2005
• Issued: 07/26/2011
• Est. Priority Date: 12/27/2004
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ryu, Ki Seon, Kim, Yong Ho
• Primary Examiner(s): Juntima; Nittaya
• Application Number:
  US11/722,874
• Publication Number:
  US 20090080351A1
• Time in Patent Office: 2,160 Days
• Field of Search: 370/328, 370/241, 455/442, 375/224
• US Class Current: 370/252
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/1614 using bitmaps
• CPC Class Codes: H04L 1/1635 Cumulative acknowledgement, i.e. the acknowledgement message applying to all previous messages
• CPC Class Codes: H04L 1/1685 the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
• CPC Class Codes: H04L 12/1868 Measures taken after transmission, e.g. acknowledgments
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 76/40 for selective distribution or broadcast

Abstract

The present invention relates to a method of controlling data transmission for a multimedia and broadcasting service in a broadband wireless access system. As an aspect of the present invention, a base station receives feedback information including burst profile information with which a terminal can receive MBS data without errors and the base station configures an appropriate burst profile and transmit the MBS data using the burst profile to the terminal, thereby reception errors in the terminal can be minimized and radio resources can be used efficiently.

Claims

1. A method of controlling data transmission for a multicast and broadcast service (MBS) in a broadband wireless access system, the method comprising:

transmitting MBS data to at least one terminal;

receiving MBS data feedback information including information associated with a coding and modulation scheme selected by the at least one terminal; and

determining a coding and modulation scheme for transmitting the MBS data based on the MBS data feedback information,

wherein the MBS data feedback information further includes MBS data identification information, an MBS data connection identifier (CID), and a configuration change count (CCC) of a downlink channel descriptor (DCD) message defining a burst profile associated with the coding and modulation scheme selected by the at least one terminal.

2. The method of claim 1, further comprising retransmitting the MBS data to the at least one terminal using the determined coding and modulation scheme.

3. The method of claim 2, further comprising:

transmitting MAP information for the MBS data, wherein the MAP information is an MBS MAP.

4. The method of claim 3, further comprising:

transmitting MAP information for the retransmitted MBS data, wherein the MAP information for the retransmitted MBS data is a general downlink MAP.

5. The method of claim 1, wherein the at least one terminal is in a state of an idle mode.

6. The method of claim 5, wherein the coding and modulation scheme for transmitting the MBS data is determined based on the MBS data feedback information from the at least one terminal in an idle mode and burst profiles from at least one terminal in a sleep mode or a normal mode.

7. The method of claim 1, wherein the MBS data feedback information is included in a MBS feedback header to be transmitted.

8. The method of claim 7, wherein the MBS feedback header is transmitted through a contention-based uplink band.

9. The method of claim 7, further comprising:

allocating an uplink band for transmitting the MBS feedback header to the at least one terminal; and

receiving the MBS feedback header through the allocated uplink band.

10. The method of claim 1, wherein the MBS data identification information is a block sequence number (BSN) of the MBS data.

11. The method of claim 1, wherein the MBS data identification information is a frame number of the MBS data.

12. A method of controlling data transmission for a multicast and broadcast service (MBS) at a terminal in a broadband wireless access system, the method comprising:

receiving MBS data from a base station;

determining whether to request modification of a coding and modulation scheme for transmitting the MBS data; and

transmitting MBS data feedback information including information associated with a desired coding and modulation scheme, if the requested modification is determined to be necessary,

wherein the MBS data feedback information further includes MBS data identification information, an MBS data connection identifier (CID), and a configuration change count (CCC) of a downlink channel descriptor (DCD) message defining a burst profile associated with the coding and modulation scheme selected by at least one terminal for receiving the MBS data.

13. The method of claim 12, wherein the modification of the coding and modulation scheme is determined to be necessary if the received MBS data has errors or the burst profile of the received MBS data is not suitable for receiving the MBS data.

14. The method of claim 12, further comprising acquiring uplink transmission synchronization for transmitting the MBS data feedback information to the base station, if the terminal is in an idle mode.

15. The method of claim 12, wherein the MBS data feedback information is included in an MBS feedback header to be transmitted.

16. The method of claim 15, wherein the MBS feedback header is transmitted through a contention-based uplink band.

17. The method of claim 15, further comprising transmitting the MBS feedback header through an uplink band allocated by the base station.

18. The method of claim 12, further comprising:

receiving a MAP information for the MBS data, wherein the MAP information is an MBS MAP.

19. The method of claim 12, further comprising receiving the MBS data retransmitted from the base station according to a desired coding and modulation scheme.

20. The method of claim 19, further comprising:

receiving MAP information for the retransmitted MBS data, wherein the MAP information for the retransmitted MBS data is a general downlink MAP.

21. The method of claim 12, wherein the MBS data identification information is a block sequence number (BSN) of the MBS data.

22. The method of claim 12, wherein the MBS data identification information is a frame number of the MBS data.