Method of performing feedback for multicast and broadcast service

• US 8,417,273 B2
• Filed: 12/17/2008
• Issued: 04/09/2013
• Est. Priority Date: 12/18/2007
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Koo, Ja Ho, Kim, Su Nam, Ihm, Bin Chul, Ko, Hyun Soo
• Primary Examiner(s): Pan, Yuwen
• Assistant Examiner(s): Wang, Fanghwa
• Application Number:
  US12/808,952
• Publication Number:
  US 20100323737A1
• Time in Patent Office: 1,574 Days
• Field of Search: None
• US Class Current: 455/509
• 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 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 27/3488 Multiresolution systems
• 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 72/0466 the resource being a scrambling code

Abstract

A method of performing a feedback for a multicast and broadcast service (MBS) is disclosed. A Multicast Broadcast Service (MBS) feedback method includes, generating, by a base station contained in a multi-cell multicast broadcast single frequency network (MBSFN) zone, a ranging channel code for a multicast broadcast service (MBS) feedback, allocating the ranging channel code to a mobile station contained in a cell zone of the base station, and receiving the MBS feedback information based on the ranging channel code from the mobile station. So, an adaptive modulation and coding (AMC) is applied to the MBS according to the NACK feedback, such that a throughput of the MBS system increases.

Claims

1. A Multicast Broadcast Service (MBS) non-acknowledgment (NACK) feedback method comprising:

generating, by a specific base station among a plurality of base stations in a MBS feedback zone of a multi-cell multicast broadcast single frequency network (MBSFN) zone, a ranging channel code for MBS feedback;

grouping mobile stations contained in the MBS feedback zone;

allocating the ranging channel code to a mobile station; and

receiving the MBS feedback based on the ranging channel code from the mobile station,

wherein the MBSFN zone includes more than one MBS feedback zone, and

wherein the specific base station is configured to receive MBS feedback as a representative for the plurality of base stations in the MBS feedback zone.

2. The MBS NACK feedback method according to claim 1, wherein the grouping of the mobile stations is carried out using at least one of the number of ranging channel codes for the MBS feedback, the number of specific base stations, and the number of mobile stations contained in the MBS feedback zone.

3. The MBS NACK feedback method according to claim 1, further comprising:

adjusting a modulation and coding scheme (MCS) level according to the MBS feedback.

4. The MBS NACK feedback method according to claim 1, wherein a length of a cyclic prefix for the MBS feedback is longer than that of a general cyclic prefix.