Method of Transmitting Data Based on Adaptive Modulation and Coding

• US 20100208678A1
• Filed: 11/06/2008
• Published: 08/19/2010
• Est. Priority Date: 11/07/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Cho, Han Gyu, Choi, Jin Soo, Han, Jong Young, Park, Hyung Ho, Nam, Seung Woo, Chung, Jae Hoon, Kim, Jong Min
• Granted Patent: US 8,553,525 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• 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 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/0046 Determination of how many bits are transmitted on different sub-channels
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority

Abstract

A method of transmitting data is provided. The method includes generating a frame, the frame comprising a data burst, a submap and a map wherein the submap indicates a resource allocation state of the data burst, and the map indicates a differential adaptive modulation and coding (AMC) level for the submap, and transmitting data using the frame, wherein the differential AMC level is information on change in an AMC level applied to the submap comparing with other submap in a different frame. High-speed data transmission is realized and limited radio resources can be more efficiently used.

Claims

1. A method of transmitting data, the method comprising:

generating a frame, the frame comprising a data burst, a submap and a map wherein the submap indicates a resource allocation state of the data burst, and the map indicates a differential adaptive modulation and coding (AMC) level for the submap; and

transmitting data using the frame,

wherein the differential AMC level is information on change in an AMC level applied to the submap comparing with other submap in a different frame.

2. The method of claim 1, wherein the differential AMC level is an amount of AMC level change that represents an amount of change in the AMC level applied to the submap.

3. The method of claim 1, wherein the differential AMC level comprises an absolute value of the amount of change in the AMC level applied to the submap and AMC level up/down information that indicates whether the absolute value is a positive or negative number.

4. The method of claim 1, wherein the frame comprises a plurality of submaps and the map indicates the differential AMC level for each of the plurality of submaps.

5. A method of transmitting an AMC level in an AMC scheme-based communication system, the method comprising:

transmitting an AMC level in a first transmission period; and

transmitting a differential AMC level that represents an amount of change in the AMC level in a second transmission period,

wherein the AMC level and the differential AMC level are used to adaptively determine a coding and modulation scheme for a frame in the second transmission period.

6. The method of claim 5, further comprising:

transmitting data using the frame, the frame comprising a data burst and a submap that indicates a resource allocation state of the data burst.

7. The method of claim 6, wherein the AMC level is applied to the submap.

8. The method of claim 7, wherein the frame further comprises a map, the map including the differential AMC level, the differential AMC level representing an amount of change in the AMC level.