Methods and systems for adaptive encoding of real-time information in packet-switched wireless communication systems

• US 20070091815A1
• Filed: 12/21/2005
• Published: 04/26/2007
• Est. Priority Date: 10/21/2005
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Tinnakornsrisuphap, Peerapol, Lott, Christopher, Su, Guan-Ming
• Granted Patent: US 8,842,555 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04L 65/762 at the source reformatting of additional data in video distribution servers H04N21/2355
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04N 21/2383 Channel coding or modulation of digital bit-stream, e.g. QPSK modulation arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/2402 Monitoring of the downstream path of the transmission network, e.g. bandwidth available traffic monitoring in data switching networks H04L43/00; monitoring data switching networks utilization H04L43/0876
• CPC Class Codes: H04N 21/2662 Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
• CPC Class Codes: H04N 21/41407 embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57
• CPC Class Codes: H04N 21/6377 directed to server one-way streaming services wherein the source is controlled by the destination H04L65/613
• CPC Class Codes: H04N 21/658 Transmission by the client directed to the server

Abstract

Embodiments described herein relate to providing adaptive encoding of real-time information in packet-switched wireless communication systems. In an embodiment, a rate-adaptation unit may be configured to receive local as well as end-to-end feedback information associated with data transmission (such as data delay, packet loss, transmit power headroom, channel condition, sector loading, the amount of buffered data, etc.) from a wireless access module in communication with wireless/wired networks, and adapt the real-time information encoding in accordance with such feedback information.

Claims

1. An apparatus for real-time information encoding in wireless communications, comprising:

a rate-adaptation unit configured to receive feedback information associated with data transmission from a wireless access module; and

an encoder configured to encode real-time information in accordance with the feedback information.

2. The apparatus of claim 1, wherein the encoder is further configured to adapt an encoding rate in accordance with the feedback information.

3. The apparatus of claim 2, wherein the encoding rate is adjusted by way of at least one of a quantization parameter and a frame rate.

4. The apparatus of claim 1, wherein the encoder is further configured to determine a unit of the real-time information to be encoded, based in part on the feedback information.

5. The apparatus of claim 4, wherein the feedback information is associated with reverse link lost packet information.

6. The apparatus of claim 4, wherein the encoder is further configured to select a type for a subsequent frame to be encoded.

7. The apparatus of claim 6, wherein the frame type includes one of an I-type frame and a P-type frame, and a reference frame associated with a P-type frame.

8. The apparatus of claim 1, wherein the feedback information includes at least one of local feedback information and end-to-end feedback information.

9. The apparatus of claim 8, wherein the feedback information includes at least one of reverse link data delay and end-to-end data delay.

10. The apparatus of claim 8, wherein the feedback information includes reverse link channel condition.

11. The apparatus of claim 10, wherein the channel condition includes at least one of transmit power headroom and estimated channel rate associated with an access terminal.

12. The apparatus of claim 8, wherein the feedback information includes reverse link sector loading status.

13. The apparatus of claim 8, wherein the feedback information includes at least one of reverse link physical layer packet payload and reverse link MAC layer packet payload.

14. The apparatus of claim 8, wherein the feedback information is associated with an amount of data buffered in the wireless access module.

15. The apparatus of claim 1, further comprising the wireless access module, configured to be in communication with a wireless communication network.

16. An apparatus for real-time information encoding in wireless communications, comprising:

means for receive feedback information associated with data transmission from a wireless access module; and

means for encoding real-time information in accordance with the feedback information.

17. The apparatus of claim 16, wherein the means for encoding is further configured to adapt an encoding rate in accordance with the feedback information.

18. The apparatus of claim 17, wherein the encoding rate is adjusted by way of at least one of a quantization parameter and a frame rate.

19. The apparatus of claim 16, wherein the means for encoding is further configured to determine a unit of the real-time information to be encoded, based in part on the feedback information.

20. The apparatus of claim 19, wherein the means for encoding is further configured to select a type for a subsequent frame to be encoded.

21. A method for real-time information encoding in wireless communications, comprising:

receiving feedback information associated with data transmission from a wireless access module; and

encoding real-time information in accordance with the feedback information.

22. The method of claim 21, wherein the encoding real-time information includes adapting an encoding rate in accordance with the feedback information.

23. The method of claim 21, further comprising adjusting the encoding rate by way of at least one of a quantization parameter and a frame rate.

24. The method of claim 21, wherein the encoding real-time information includes determining a unit of the real-time information to be encoded, based in part on the feedback information.

25. The method of claim 24, further comprising selecting a frame type for a subsequent frame to be encoded.

26. The method of claim 24, wherein the feedback information is associated with reverse link lost packet information.

27. The apparatus of claim 21, wherein the feedback information includes at least one of local feedback information and end-to-end feedback information.

28. The apparatus of claim 27, wherein the feedback information includes at least one of reverse link data delay and end-to-end data delay.

29. The apparatus of claim 27, wherein the feedback information includes reverse link channel condition.

30. The method of claim 29, wherein with the reverse link channel condition includes at least one of available transmit power and estimated channel rate associated with an access terminal.

31. The apparatus of claim 27, wherein the feedback information includes reverse link sector loading status.

32. The apparatus of claim 27, wherein the feedback information is associated with an amount of data buffered in the wireless access module.

33. A method for real-time information encoding, comprising:

receiving reverse link data delay;

comparing the reverse link data delay with at least one threshold; and

adjusting an encoding rate in accordance with the comparison.

34. The method of claim 33, further comprising:

receiving end-to-end data delay; and

adjusting the at least one threshold based in part on the end-to-end data delay.

35. The method of claim 33, wherein the encoding rate is adjusted by way of at least one of a quantization parameter and a frame rate.

36. An apparatus for real-time information encoding, comprising:

means for receiving reverse link data delay;

means for comparing the reverse link data delay with at least one threshold; and

means for adjusting an encoding rate in accordance with the comparison.

37. The apparatus of claim 36, further comprising:

means for receiving end-to-end data delay; and

means for adjusting the at least one threshold based in part on the end-to-end data delay.