METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING AUDIO/VIDEO CONTENTS IN WIRELESS ACCESS NETWORKS

• US 20100316115A1
• Filed: 11/01/2007
• Published: 12/16/2010
• Est. Priority Date: 11/01/2007
• Status: Active Grant

• Current Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Original Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Inventors: Song, Yang, Zheng, Wu, Liu, Jimin
• Granted Patent: US 8,861,326 B2
• Time in Patent Office: Days
• US Class Current: 375/240.01
• CPC Class Codes: H04B 7/0615 of weighted versions of same signal
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 27/3488 Multiresolution systems
• CPC Class Codes: H04W 52/10 Open loop power control
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/265 taking into account the quality of service QoS
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity

Abstract

Disclosed are method and apparatus for transmitting/receiving audio/video content data in wireless access networks. The method comprises the steps of: encoding the audio/video content data into a basic stream having a first level of quality and an advanced stream, combination of the basic stream and the advanced stream has a second level of quality higher than the first level of quality; and transmitting the basic stream and the advanced stream with a first power and a second power lower than the first power on antennas, respectively. With the method and apparatus of the invention, the low SINR users are able to maintain the low data rate receiving the basic stream and the high SINR user can receive both the basic stream and advanced stream from two logical channels.

Claims

1. A method for transmitting an audio/video content data comprising the steps of:

encoding the audio/video content data into a basic stream having a first level of quality and an advanced stream, combination of the basic stream and the advanced stream has a second level of quality higher than the first level of quality; and

transmitting the basic stream and the advanced stream with a first power and a second power lower than the first power on antennas, respectively.

2. The method of claim 1, further comprising the step of:

independently channel coding and modulating the basic stream and the advanced stream.

3. The method of claim 1, wherein the first power is set in accordance with coverage.

4. The method of claim 3, wherein the second power is set by taking the inference and power restrictions into consideration.

5. A method for receiving an audio/video content data, wherein the audio/video content data are encoded into a basic stream having a first level of quality and an advanced stream, combination of the basic stream and the advanced stream has a second level of quality higher than the first level of quality, the method comprises the steps of:

applying a MIMO detection algorithm to the received signals to generate at least one stream; and

recovering the audio/video content data based on only one stream or on two streams.

6. The method of claim 5, further comprising the step of:

independently channel decoding and demodulating two streams.

7. The method of claim 5, wherein the recovering step is based on the results of channel information.

8. The method of claim 5, wherein the recovering step is based on the packet error rate results at MAC layer.

9. The method of claim 5, wherein two streams are separated in two different logical channels.

10. An apparatus for transmitting an audio/video content data comprising:

an encoder for encoding the audio/video content data into a basic stream having a first level of quality and an advanced stream, combination of the basic stream and the advanced stream has a second level of quality higher than the first level of quality; and

a transmitting means for transmitting the basic stream and the advanced stream with a first power and a second power lower than the first power on antennas, respectively.

11. The apparatus of claim 10, further comprising first and second channel encoders and first and second modulators for independently channel coding and modulating the basic stream and the advanced stream.

12. An apparatus for receiving an audio/video content data, wherein the audio/video content data are encoded into a basic stream having a first level of quality and an advanced stream, combination of the basic stream and the advanced stream has a second level of quality higher than the first level of quality, the apparatus comprises:

a MIMO detector for applying a MIMO detection algorithm to the received signals to generate at least one stream; and

a source decoder for recovering the audio/video content data based on only one stream or on two streams.

13. The apparatus of claim 12, further comprising first and second channel decoder for independently channel decoding two streams.