Method for performing an adaptive modulation and coding scheme in mobile communication system

• US 9,577,862 B2
• Filed: 07/28/2014
• Issued: 02/21/2017
• Est. Priority Date: 03/13/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Moon Il, Ihm, Bin Chul, Chun, Jin Young, Park, Sung Ho, Ko, Hyun Soo, Lee, Wook Bong
• Primary Examiner(s): LIN, KENNY S
• Application Number:
  US14/444,619
• Publication Number:
  US 20140334425A1
• Time in Patent Office: 939 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04B 1/16 Circuits
• 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 1/0017 where the mode-switching is based on Quality of Service requirement
• CPC Class Codes: H04L 1/0029 Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling power control H04W52/04
• CPC Class Codes: H04L 1/0073 Special arrangements for feedback channel
• CPC Class Codes: H04L 12/18 for broadcast or conference , e.g. multicast
• CPC Class Codes: H04L 25/0202 Channel estimation
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 5/0058 Allocation criteria
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

A method for performing an adaptive modulation and coding scheme in a mobile communication system. Including receiving a signal and selecting a modulation and coding scheme (MCS) level from an MCS subset of an MCS set considering information derived from the signal, by a mobile station. The MCS subset is selected in accordance with a service type related to the mobile station and the MCS subset is configured with one or more MCS levels, the MCS set is represented by 5 bits and the MCS subset is represented by 4 bits to indicate MCS value, respectively, and the 4 bits of the MCS subset is a part of the 5 bits of the MCS set.

Claims

1. A method for performing an adaptive modulation and coding (AMC) scheme in a mobile communication system, the method performed by a receiver and comprising:

receiving MCS information from a transmitter, wherein a size of the MCS information is 5 bits;

identifying a modulation and coding scheme (MCS) level from an MCS set according to the MCS information; and

communicating with the transmitter using the MCS level,

wherein the MCS set includes a MCS subset defined in accordance with a service type of the receiver,

wherein the MCS subset is configured with one or more MCS levels having different modulation schemes, and

wherein the MCS level is indicated by using four bits of the MCS information when the MCS level is selected from the MCS subset.

2. The method according to claim 1, wherein the MCS level represents a modulation scheme one of a quadrature phase shift keying QPSK, a 16 quadrature amplitude modulation QAM, and a 64 QAM.

3. The method according to claim 2, wherein the MCS subset is configured with MCS levels of the QPSK and the 16 QAM.

4. The method according to claim 2, wherein each of the MCS levels are mapped to different coding rates.

5. The method according to claim 2, the service type defines an open-loop transmission and reception scheme of unicast traffic.

6. The method according to claim 2, wherein a most significant bit of the MCS information is set to ‘

0’

.

7. The method according to claim 2, wherein the four bits of the MCS information is least significant bits of the MCS information.

8. A receiver for performing an adaptive modulation and coding (AMC) scheme in a mobile communication system,

wherein the receiver is configured to:

receive MCS information from a transmitter,

identify a modulation and coding scheme (MCS) level from an MCS set according to the MCS information; and

communicate with the transmitter using the MCS level, and

wherein a size of the MCS information is 5 bits,

the MCS set includes a MCS subset defined in accordance with a service type of the receiver,

the MCS subset is configured with one or more MCS levels having different modulation schemes, and

the MCS level is indicated by using four bits of the MCS information when the MCS level is selected from the MCS subset.

9. The receiver according to claim 8, wherein the MCS level represents a modulation scheme one of a quadrature phase shift keying QPSK, a 16 quadrature amplitude modulation QAM, and a 64 QAM.

10. The receiver according to claim 9, wherein the MCS subset is configured with MCS levels of the QPSK and the 16 QAM.

11. The receiver according to claim 9, wherein each of the MCS levels are mapped to different coding rates.

12. The receiver according to claim 9, the service type defines an open-loop transmission and reception scheme of unicast traffic.

13. The receiver according to claim 9, wherein a most significant bit of the MCS information is set to ‘

0’

.

14. The receiver according to claim 9, wherein the four bits of the MCS information is least significant bits of the MCS information.