Resource management in a wireless communication network

• US 7,826,548 B2
• Filed: 03/24/2008
• Issued: 11/02/2010
• Est. Priority Date: 05/19/2006
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Suk Woo, Yoon, Young Cheul, Kwon, Soon Yil, Sun, Li-Hsiang, Wang, Shu, Kim, Ho Bin, Yi, Byung Kwan, Kim, Sang Gook
• Primary Examiner(s): VO, DON NGUYEN
• Application Number:
  US12/054,178
• Publication Number:
  US 20090022234A1
• Time in Patent Office: 953 Days
• Field of Search: 375/260, 375/261, 375/267, 375/299, 375/302
• US Class Current: 375/267
• CPC Class Codes: H04L 27/2604 Multiresolution systems by means of multiresolution subcarriers H04L27/183, H04L27/3488
• CPC Class Codes: H04L 27/3488 Multiresolution systems
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0021 in which codes are applied as a frequency-domain sequences, e.g. MC-CDMA
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided

Abstract

A method of transmitting more than one signal in a wireless communication system is provided. The method comprises allocating multiple symbols to a first signal constellation and a second signal constellation, wherein the first signal constellation refers to base layer signals and the second signal constellation refers to enhancement layer signals; modulating the multiple symbols of the first signal constellation and the second signal constellation; and transmitting the modulated symbols, wherein configuration information used for modulating the multiple symbols is provided in a control message.

Claims

1. A method of transmitting more than one signal in a wireless communication system, the method comprising:

allocating multiple symbols to a first layer signal constellation and a second layer signal constellation, wherein the first layer signal constellation refers to base layer signals and the second layer signal constellation refers to enhancement layer signals;

modulating the multiple symbols of the first layer signal constellation and the second layer signal constellation, wherein the multiple symbols of the second layer signal constellation are rotated by a rotation angle determined based on an optimal rotation angle provided by a receiver; and

transmitting the modulated symbols to the receiver,

wherein configuration information used for modulating the multiple symbols is provided to the receiver in a control message, wherein the configuration information comprises an indicator indicating whether the rotation angle by which the multiple symbols of the second layer signal constellation are rotated is included in the control message, and further comprises the rotation angle if the indicator indicates that the rotation angle is included in the control message.

2. The method of claim 1, wherein the control message is transmitted over a control channel.

3. The method of claim 1, wherein the configuration information comprises data indicating that modulation of the multiple symbols is enhanced.

4. The method of claim 1, wherein the rotation angle indicates a degree by which an initial reference phase for the enhancement layer signals is modulated.

5. The method of claim 1, wherein the control message comprises:

a modulation segment used for indicating how the first and second layer signal constellations are modulated and scaled; and

a modulation segment used for indicating how the second layer signal constellation is enhanced.

6. An apparatus for transmitting more than one signal in a wireless communication system, the system comprising:

a first logic unit for allocating multiple symbols to a first layer signal constellation and a second layer signal constellation, wherein the first signal constellation refers to base layer signals and the second signal constellation refers to enhancement layer signals;

a second logic unit for modulating the multiple symbols of the first layer signal constellation and the second layer signal constellation, wherein the multiple symbols of the second layer signal constellation are rotated by a rotation angle determined based on an optimal rotation angle provided by a receiver; and

a third logic unit for transmitting the modulated symbols to the receiver,

wherein configuration information used for modulating the multiple symbols is provided to the receiver in a control message, wherein the configuration information comprises an indicator indicating whether the rotation angle by which the multiple symbols of the second layer signal constellation are rotated is included in the control message, and further comprises the rotation angle if the indicator indicates that the rotation angle is included in the control message.

7. The apparatus of claim 6, wherein the control message is transmitted over a control channel.

8. The apparatus of claim 6, wherein the configuration information further comprises data indicating that modulation of the multiple symbols is enhanced.

9. The apparatus of claim 6, wherein the rotation angle indicates a degree by which an initial reference phase for the enhancement layer signals is modulated.

10. The apparatus of claim 6, wherein the control message comprises a modulation segment used for indicating how the first and second layer signal constellations are modulated and scaled.

11. The apparatus of claim 6, wherein the control message comprises a modulation segment used for indicating how the second layer signal constellation is enhanced.