METHOD OF TRANSMITTING LINK-ADAPTIVE TRANSMISSION OF DATA STREAM IN A MOBILE COMMUNICATION SYSTEM

• US 20090241147A1
• Filed: 09/05/2007
• Published: 09/24/2009
• Est. Priority Date: 09/05/2006
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Taek Soo, Cho, Hyeon Cheol, Jeon, Beom Jin
• Application Number:
  US12/373,271
• Publication Number:
  US 20090241147A1
• Time in Patent Office: Days
• US Class Current: 725/62
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0011 applied to payload information
• CPC Class Codes: H04L 1/0014 by adapting the source coding
• CPC Class Codes: H04L 1/203 Details of error rate determination, e.g. BER, FER or WER
• CPC Class Codes: H04N 19/59 involving spatial sub-sampling or interpolation, e.g. alteration of picture size or resolution
• CPC Class Codes: H04N 19/60 using transform coding
• CPC Class Codes: H04N 21/234363 by altering the spatial resolution, e.g. for clients with a lower screen resolution
• CPC Class Codes: H04N 21/234381 by altering the temporal resolution, e.g. decreasing the frame rate by frame skipping
• 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 21/2385 Channel allocation H04N21/266 takes precedence; Bandwidth allocation H04N21/24 takes precedence ; allocation of channels according to the instantaneous demands of the users in time-division multiplex systems H04J3/1682; admission control, resource allocation in open networks H04L12/5692; arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896; negotiating bandwidth in wireless networks H04W28/16
• 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 21/4382 Demodulation or channel decoding, e.g. QPSK demodulation analog front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/44209 Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896
• CPC Class Codes: H04N 21/6373 for rate control , e.g. request to the server to modify its transmission rate flow control in packet networks H04L47/10
• CPC Class Codes: H04N 21/6582 Data stored in the client, e.g. viewing habits, hardware capabilities, credit card number arrangements where receivers interact with the broadcast H04H20/38

Abstract

A data transmitting method is disclosed. In transmitting A/V data stream in a transmitting device of a wireless network, the present invention includes transmitting the A/V data stream having a first data format to a receiving device, if a quality of a channel for carrying the A/V data stream to the receiving device is changed, deciding to change a data format of the A/V data stream to be transmitted to the receiving device into a second data format, and transmitting the A/V data stream having the second data format to the receiving device.

Claims

1-20. -20. (canceled)

21. A method of transmitting A/V data at a source device of a wireless network, the method comprising:

transmitting an A/V data stream having a first data format to a sink device;

changing a data format of the A/V data stream to be transmitted to the sink device into a second data format when a quality of a channel for carrying the A/V data stream to the sink device has been changed; and

transmitting the A/V data stream having the second data format to the sink device.

22. The method of claim 21, further comprising changing a data rate of the A/V data stream in a physical layer when the channel quality has been changed.

23. The method of claim 21, further comprising transmitting information associated with the second data format to the sink device.

24. The method of claim 22, further comprising requesting a necessary radio resource according to the changed data rate from a control device which controls radio resource allocation in the wireless network.

25. The method of claim 21, wherein a data rate of the second data format is lower than a data rate of the first data format when the quality of the channel is degraded.

26. A device for transmitting A/V data in a wireless network, wherein the device is configured to:

transmit an A/V data stream having a first data format to a sink device;

change a data format of the A/V data stream to be transmitted to the sink device into a second data format when a quality of a channel for carrying the A/V data stream to the sink device has been changed; and

transmit the A/V data stream having the second data format to the sink device.

27. The device of claim 26, wherein the device is further configured to change a data rate of the A/V data stream in a physical layer when the channel quality has been changed.

28. The device of claim 26, wherein the device is further configured to transmit information associated with the second data format to the sink device.

29. The device of claim 27, wherein the device is further configured to request a necessary radio resource according to the changed physical layer data rate from a control device which controls radio resource allocation in the wireless network.

30. The device of claim 26, wherein a data rate of the second data format is lower than a data rate of the first data format when the quality of the channel is degraded.