Wireless video transmission system

• US 8,018,850 B2
• Filed: 04/21/2004
• Issued: 09/13/2011
• Est. Priority Date: 02/23/2004
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Laboratories of America Incorporated (Hon Hai Precision Industry Co., Ltd.)
• Inventors: van Beek, Petrus J. L., Deshpande, Sachin Govind
• Primary Examiner(s): Moe; Aung S
• Assistant Examiner(s): Louis; Vinncelas
• Application Number:
  US10/830,472
• Publication Number:
  US 20050188407A1
• Time in Patent Office: 2,701 Days
• Field of Search: 370230-253, 370/395.63, 370/431, 370/465, 370/260, 370/421, 370/444, 370/445, 370/449, 370/450, 370/455, 370/459, 370/328, 370/312, 370/315, 370/338, 370/468, 370/320, 370/389, 725/81, 725/62, 725/95, 725/67, 725/96, 725/116, 455/412.2, 455/556.1, 455/81, 709/223, 709/231, 375/240.2
• US Class Current: 370/232
• CPC Class Codes: H04N 21/2365 Multiplexing of several video streams
• CPC Class Codes: H04N 21/25891 being end-user preferences retrieval of video data in a video database based on user preferences G06F16/739; arrangements for recognizing users' preferences H04H60/46; user profiles in network data switching protocols H04L67/306; processing of user preferences or user profiles in wireless networks H04W8/18
• CPC Class Codes: H04N 21/41265 having a remote control device for bidirectional communication between the remote control device and client device unidirectional remote control device H04N21/42204
• CPC Class Codes: H04N 21/4347 Demultiplexing of several video streams
• CPC Class Codes: H04N 21/43637 involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11] arrangements for wireless networking or broadcasting of information in indoor or near-field type systems H04B10/114
• 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 21/64738 Monitoring network characteristics, e.g. bandwidth, congestion level data switched network analysis H04L41/14; monitoring functioning in data switched networks H04L43/0817; flow control in packet networks H04L47/10
• CPC Class Codes: H04N 21/64776 for requesting retransmission, e.g. of data packets lost or corrupted during transmission from server ARQ protocols H04L1/18; implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP] H04L69/16
• CPC Class Codes: H04N 21/658 Transmission by the client directed to the server
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 28/22 Negotiating communication rate

Abstract

A transmission systems suitable for video.

Claims

1. A method for transmitting data comprising:

(a) defining a first average rate to transmit a first plurality of packets of said data from a sender to a receiver;

(b) defining a second average rate to transmit a second plurality of packets of said data from said sender to said receiver, said second plurality of packets comprising a subset of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate;

(c) transmitting said second plurality of packets from said sender to said receiver over a wireless interconnection;

(d) estimating the bandwidth of said wireless interconnection;

(e) inferring a condition of said wireless interconnection based upon said bandwidth, where said condition is at least one of a bit error ratio and a packet error ratio; and

(f) modifying the amount of data contained in packets to be transmitted across said wireless interconnection based upon said condition.

2. The method of claim 1 wherein said second plurality of packets are provided to said sender at the maximum rate.

3. The method of claim 1 wherein said second plurality of packets are provided as a burst of packets with at least two packets transmitted without additional data being transmitted between them in a back-to-back fashion.

4. The method of claim 1 wherein said wireless interconnection is 802.11 compliant.

5. The method of claim 1 wherein said second plurality of packets is free from including packets not comprising audio and video data.

6. The method of claim 1 wherein said second plurality of packets is transmitted in a duration less than 1 second.

7. The method of claim 1 wherein said transmitting is by an APPLICATION LAYER.

8. The method of claim 1 wherein said inferring is based upon a table of data.

9. The method of claim 1 wherein said second plurality of packets is a burst and said first plurality of packets is not a burst.

10. A method for transmitting data comprising:

(a) defining a first average rate to transmit a first plurality of packets of said data to a receiver;

(b) defining a second average rate to transmit a second plurality of packets of said data to said receiver, said second plurality of packets comprising a subset of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate;

(c) transmitting said second plurality of packets from a transmitter to said receiver over a wireless interconnection;

(d) measuring with a processing device, the bandwidth of a wireless interconnection between said transmitter and said receiver;

(e) inferring a condition of said wireless interconnection based upon said bandwidth, where said condition is at least one of a bit error ratio and a packet error ratio; and

(f) modifying the amount of data contained in packets to be transmitted across said wireless interconnection based upon said condition.

11. The method of claim 10 wherein said amount of data is reduced if said bandwidth decreases.

12. The method of claim 10 wherein said amount of data is increased if said bandwidth increases.

13. The method of claim 10 wherein said bandwidth is based upon a packet error ratio.

14. The method of claim 10 wherein said bandwidth is based upon a bit error ratio.

15. The method of claim 10 wherein said bandwidth is based upon a signal to noise ratio.

16. The method of claim 10 wherein said inferring is based upon a table of data.

17. A method for transmitting data comprising:

(a) defining a first average rate to transmit a first plurality of packets of said data to a receiver;

(b) defining a second average rate to transmit a second plurality of packets of said data to said receiver, said second plurality of packets comprising a subset of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate;

(c) transmitting said second plurality of packets from a transmitter to said receiver over a wireless interconnection;

(d) measuring with a processing device, the capacity to transmit packets across a wireless interconnection between said transmitter and said receiver;

(e) inferring a condition of said wireless interconnection based upon said capacity, where said condition is at least one of a bit error ratio and a packet error ratio; and

(f) modifying the amount of data contained in packets to be transmitted across said wireless interconnection based upon said condition.

18. The method of claim 17 wherein said amount of data is reduced if said capacity decreases.

19. The method of claim 17 wherein said amount of data is increased if said capacity increases.

20. The method of claim 17 wherein said inferring is based upon a table of data.

21. A method for transmitting data comprising:

(a) defining a first average rate to transmit a first plurality of packets of said data to a receiver;

(b) defining a second average rate to transmit a second plurality of packets of said data, said second plurality of packets comprising a subset of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate;

(c) transmitting said second plurality of packets from a transmitter to said receiver over a wireless interconnection;

(d) measuring with a processing device, a current estimate of the capacity to transmit packets across a wireless interconnection between said transmitter and said receiver; and

(e) modifying the amount of data contained in packets to be transmitted across said wireless interconnection, said amount based upon said current estimate and based upon at least one past estimate of said capacity of said wireless interconnection measured prior to said current estimate.

22. The method of claim 21 wherein said amount of data is reduced if said capacity decreases.

23. The method of claim 21 wherein said amount of data is increased if said capacity increases.

24. The method of claim 21 wherein said amount of data is reduced if said capacity has decreased over a temporal time period of 1 second.

25. The method of claim 21 wherein said amount of data is increased if said capacity has increased over a temporal time period of 1 second.

26. The method of claim 21 wherein said modifying is based upon a table of data.

27. A method for transmitting data comprising:

(a) defining a first average rate to transmit a first plurality of packets of said data to a receiver;

(b) defining a second average rate to transmit a second plurality of packets of said data, said second plurality of packets comprising a subset of said first plurality of packets, wherein said second plurality of packets is less than said first plurality of packets, wherein said second average rate is greater than said first average rate;

(c) transmitting said second plurality of packets from a transmitter to said receiver over a wireless interconnection;

(d) estimating with a processing device, an estimate of the capacity to transmit packets across a wireless interconnection between said transmitter and said receiver; and

(e) modifying the amount of data contained in packets to be transmitted across said wireless interconnection, said amount based upon said estimate and based upon a delay in estimating said estimate of said capacity of said wireless interconnection and subsequently sending data across said wireless interconnection based on said estimate.

28. The method of claim 27 wherein said amount of data is reduced if said capacity decreases.

29. The method of claim 27 wherein said amount of data is increased if said capacity increases.

30. The method of claim 27 wherein said modifying is based upon a table of data.