Method and system for communication of video information over wireless channels

• US 20070234170A1
• Filed: 03/22/2007
• Published: 10/04/2007
• Est. Priority Date: 03/29/2006
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Singh, Harkirat, Xia, Pengfei, Shao, Huai-Rong, Ngo, Chiu
• Application Number:
  US11/728,009
• Publication Number:
  US 20070234170A1
• Time in Patent Office: Days
• US Class Current: 714/746
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1874 Buffer management
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• 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 21/44227 Monitoring of local network, e.g. connection or bandwidth variations; Detecting new devices in the local network configuring of peripheral devices in general G06F9/4411; monitoring connectivity in data switched networks H04L43/0811
• CPC Class Codes: H04N 21/6375 for requesting retransmission , e.g. of data packets lost or corrupted during transmission from serverARQ 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 21/6583 Acknowledgement

Abstract

A method and system for transmitting video information from a sender to a receiver over a wireless channel is provided. Video information bits are placed into one or more data packets at the sender, and each data packet is transmitted from the sender to the receiver over a wireless channel during a current time frame. For each transmitted data packet, the sender receives a corresponding acknowledgment packet from the receiver. The sender then performs burst retransmission of the negatively acknowledged packets during a next time frame comprising a BeamTrack Group for transmission of further data packets from the sender to the receiver over a wireless channel. The receiver utilizes each retransmitted data packet to recover a lost or erroneously received data packet.

Claims

1. A method of communication of video information between a sender and a receiver over a wireless channel, comprising the steps of:

inputting video information bits;

packetizing the video information bits into one or more data packets;

transmitting multiple data packets from the sender to the receiver over a wireless channel during a current time frame;

for each transmitted data packet, receiving a corresponding acknowledgment packet from the receiver; and

retransmitting a correct copy of information identified in the negatively acknowledged packets by burst retransmission during a next time frame comprising a Beamtrack group for transmission of further data packets from the sender to the receiver over a wireless channel.

2. The method of claim 1 wherein performing burst retransmission of the data packets further includes delaying retransmission of a correct copy of the negatively acknowledged data packets until said next time frame, and then retransmitting said correct copy of the negatively acknowledged data packets at the beginning of said next time frame in a burst sequence.

3. The method of claim 2 further comprising the steps of:

receiving each of the transmitted data packets at the receiver;

generating an acknowledgment packet for each data packet, wherein each acknowledgment packet includes a positive acknowledgement if a corresponding data packet was received without errors, or a negative acknowledgement if a corresponding data packet was lost or arrived at the receiver with errors; and

transmitting the acknowledgment packet from the receiver to the sender over a wireless channel.

4. The method of claim 1 wherein transmitting the data packets further includes transmitting the data packets from the sender to the receiver over a high-rate wireless channel.

5. The method of claim 4 wherein transmitting the acknowledgment packets from the receiver to the sender over a wireless channel further includes the step of the receiver transmitting a burst acknowledgment to the sender over a low-rate wireless channel.

6. The method of claim 5 wherein:

transmitting the multiple data packets from the sender to the receiver further comprises transmitting the multiple data packets from the sender to the receiver by directional transmission beams over a high-rate wireless channel; and

the receiver transmitting the burst acknowledgment to the sender over a low-rate channel further includes the steps of the receiver transmitting the burst acknowledgments to the sender by directional transmission over the low-rate wireless channel.

7. The method of claim 6 wherein a data packet in the multiple data packets includes beamtracking information.

8. The method of claim 7 wherein a corresponding acknowledgment packet further includes beamtracking information.

9. The method of claim 6 wherein the current time frame comprises a current beamtracking period and the next time frame comprises a next beamtracking period.

10. The method of claim 1 wherein the video information comprises uncompressed video information.

11. The method of claim 10 wherein the video information comprises uncompressed high-definition video information.

12. The method of claim 1 further comprising:

the receiver utilizing a retransmitted data packet to recover a lost or erroneous data packet.

13. The method of claim 1 further comprising the steps of:

placing a copy of each transmitted data packet in a retransmission buffer;

for each transmitted data packet, receiving a corresponding acknowledgment; and

removing the data packets with positive acknowledgments from the retransmission buffer;

wherein retransmitting a correct copy of negatively acknowledged packets includes delaying retransmission of the corresponding data packets remaining in the retransmission buffer until a next time frame for transmission of multiple data packets from the sender to the receiver, and during said next time frame, burst retransmitting the data packets from the retransmission buffer to the receiver over a wireless channel.

14. The method of claim 13 wherein the step of retransmitting the data packets further includes the step of retransmitting the data packets from the retransmission buffer to the receiver in a burst sequence at the beginning of said next time frame.

15. The method of claim 14 wherein the current time frame comprises a current beamtracking period and the next time frame comprises a next beamtracking period.

16. The method of claim 15 further comprising the step of:

the receiver utilizing a retransmitted data packet to recover a lost or erroneous data packet.

17. The method of claim 1 further comprising the steps of:

placing a copy of each transmitted data packet in a retransmission buffer; and

for each transmitted data packet, receiving a corresponding acknowledgment;

wherein retransmitting a correct copy of negatively acknowledged packets includes delaying retransmission of the corresponding data packets in the retransmission buffer until a next time frame for transmission of multiple data packets from the sender to the receiver, and during said next time frame, burst retransmitting the data packets from the retransmission buffer to the receiver over a wireless channel.

18. The method of claim 17 wherein the step of retransmitting the data packets further includes the step of retransmitting the data packets from the retransmission buffer to the receiver in a burst sequence at the beginning of said next time frame.

19. The method of claim 18 wherein the current time frame comprises a current beamtracking period and the next time frame comprises a next beamtracking period.

20. The method of claim 17 further comprising the step of:

at the beginning of said next time frame, emptying the remaining data packets from the retransmission buffer.

21. A wireless communication system for communication of video information, comprising:

a wireless transmitter including a packetizer configured for packetizing video information bits into one or more data packets, and a communication controller for transmitting multiple data packets over a wireless channel during a current time frame; and

a wireless receiver including a depacketizer configured for receiving the data packets from the transmitter, an error detection module configured to check each packet for errors, and an acknowledgment (ACK) module configured to generate an acknowledgment based on the error detection for each data packet to transmit to the sender for each received packet;

wherein the transmitter further includes a retransmitter configured to transmit a correct copy of the information identified in the negatively acknowledged packets, by burst retransmissions during a next time frame for transmission of further data packets from the transmitter to the receiver over a wireless channel.

22. The system of claim 21 wherein the retransmitter is further configured to delay retransmission of the correct copy of information for the negatively acknowledged data packets until said next time frame, and then retransmits a correct copy of the negatively acknowledged information at the beginning of said next time frame as a burst sequence.

23. The system of claim 22 wherein the acknowledgement module is further configured to generate an acknowledgment packet for each data packet, wherein each acknowledgment packet includes a positive acknowledgement if a corresponding data packet was received without errors, or a negative acknowledgement if a corresponding data packet was lost or arrived at the receiver with errors.

24. The system of claim 21 wherein the transmitter transmits the data packets to the receiver over a high-rate wireless channel.

25. The system of claim 24 wherein the receiver transmits the acknowledgment packets to the transmitter in a burst sequence over a low-rate wireless channel.

26. The system of claim 25 wherein:

the communication controller of the transmitter is further configured to transmit the multiple data packets to the receiver by directional transmission beams over the high-rate wireless channel; and

the acknowledgment module of the receiver is further configured to transmit the burst acknowledgments to the sender by directional transmission over the low-rate wireless channel.

27. The system of claim 26 wherein a data packet in the multiple data packets includes beamtracking information.

28. The system of claim 27 wherein a corresponding acknowledgment packet further includes beamtracking information.

29. The system of claim 26 wherein the current time frame comprises a current beamtracking period and the next time frame comprises a next beamtracking period.

30. The system of claim 21 wherein the video information comprises uncompressed video information.

31. The system of claim 30 wherein the video information comprises uncompressed high-definition video information.

32. The system of claim 21 wherein the receiver further includes an error correction module configured to utilize retransmitted information to recover lost or erroneously received information.

33. The system of claim 21 wherein:

the communication module of the transmitter is further configured to place a copy of each transmitted data packet in a retransmission buffer, and to remove the data packets with positive acknowledgments from the retransmission buffer; and

the retransmitter is further configured for retransmitting a correct copy of the negatively acknowledged packets by delaying retransmission of the corresponding data packets remaining in the retransmission buffer until a next time frame for transmission of multiple data packets from the sender to the receiver, and during said next time frame, burst retransmitting the data packets from the retransmission buffer to the receiver over a wireless channel.

34. The system of claim 33 wherein the retransmitter is further configured to retransmit said corresponding data packets from the retransmission buffer to the receiver in a burst sequence at the beginning of said next time frame.

35. The system of claim 34 wherein the current time frame comprises a current beamtracking period and the next time frame comprises a next beamtracking period.

36. The system of claim 21 wherein:

the communication controller of the transmitter is further configured to place a copy of each transmitted data packet in a retransmission buffer; and

the retransmitter is further configured for retransmitting a correct copy of information for the negatively acknowledged packets by delaying retransmission of the corresponding data packets in the retransmission buffer until a next time frame for transmission of multiple data packets from the sender to the receiver, and during said next time frame, burst retransmitting the data packets from the retransmission buffer to the receiver over a wireless channel.

37. The system of claim 36 wherein the retransmitter is further configured for retransmitting the data packets by retransmitting the data packets from the retransmission buffer to the receiver in a burst sequence at the beginning of said next time frame.

38. The system of claim 37 wherein the current time frame comprises a current beamtracking period and the next time frame comprises a next beamtracking period.

39. The system of claim 36 wherein the communication controller is further configured such that at the beginning of said next time frame, the communication controller empties the remaining data packets from the retransmission buffer.

40. A wireless transmitter for communication of video information over wireless channels, comprising:

a packetizer configured for packetizing video information bits into one or more data packets;

a communication controller for transmitting multiple data packets over a wireless channel to a receiver during a current time frame; and

a retransmitter configured to transmit a correct copy of information identified in the negatively acknowledged packets from a receiver, by burst retransmissions during a next time frame for transmission of further data packets from the transmitter over a wireless channel.

41. The transmitter of claim 40 wherein the retransmitter is further configured to delay retransmission of a correct copy of information for the negatively acknowledged data packets until said next time frame, and then retransmits a correct copy of the negatively acknowledged information at the beginning of said next time frame as a burst sequence.

42. The transmitter of claim 40 wherein the communication controller transmits the data packets to the receiver over a high-rate wireless channel.

43. The transmitter of claim 40 wherein the communication controller of the transmitter is further configured to transmit the multiple data packets to the receiver by directional transmission beams over a high-rate wireless channel.

44. The transmitter of claim 43 wherein a data packet in the multiple data packets includes beamtracking information.

45. The transmitter of claim 43 wherein the current time frame comprises a current beamtracking period and the next time frame comprises a next beamtracking period.

46. The transmitter of claim 40 wherein:

the communication module of the transmitter is further configured to place a copy of each transmitted data packet in a retransmission buffer, and to remove the data packets with positive acknowledgments from the retransmission buffer; and

the retransmitter is further configured for retransmitting a correct copy of the negatively acknowledged packets by delaying retransmission of the corresponding data packets remaining in the retransmission buffer until a next time frame for transmission of multiple data packets from the transmitter to the receiver, and during said next time frame, burst retransmitting the data packets from the retransmission buffer to the receiver over a wireless channel.

47. The transmitter of claim 46 wherein the retransmitter is further configured to retransmit said corresponding data packets from the retransmission buffer to the receiver in a burst sequence at the beginning of said next time frame.

48. The transmitter of claim 47 wherein the current time frame comprises a current beamtracking period and the next time frame comprises a next beamtracking period.

49. The transmitter of claim 40 wherein:

the communication controller of the transmitter is further configured to place a copy of each transmitted data packet in a retransmission buffer; and

the retransmitter is further configured for retransmitting a correct copy of information for the negatively acknowledged packets by delaying retransmission of the corresponding data packets in the retransmission buffer until a next time frame for transmission of multiple data packets from the transmitter to the receiver, and during said next time frame, burst retransmitting the data packets from the retransmission buffer to the receiver over a wireless channel.

50. The transmitter of claim 40 wherein the retransmitter is further configured for retransmitting data packets by retransmitting the data packets from the retransmission buffer to the receiver in a burst sequence at the beginning of said next time frame.

51. The transmitter of claim 50 wherein the current time frame comprises a current beamtracking period and the next time frame comprises a next beamtracking period.

52. The transmitter of claim 51 wherein the communication controller is further configured such that at the beginning of said next time frame, the communication controller empties the remaining data packets from the retransmission buffer.

53. A wireless receiver for communication of video information over wireless channels, comprising:

a communication module configured for receiving data packets from a transmitter over a wireless channel during a current time frame, the packets including video information bits;

a depacketizer configured for depacketizing the information bits in the packets;

an error detection module configured to check each packet for errors; and

an acknowledgment (ACK) module configured to generate an acknowledgment based on the error detection for each data packet to transmit to the transmitter for each received packet;

wherein the communication module is further configured to receive a burst of retransmitted packets from the transmitter for the negatively acknowledged packets during a next time frame.

54. The receiver of claim 53 wherein said next frame comprises a time frame for transmission of further packets from the transmitter.

55. The receiver of claim 54 wherein the acknowledgement module is further configured to generate an acknowledgment packet for each data packet, wherein each acknowledgment packet includes a positive acknowledgement if a corresponding data packet was received without errors, or a negative acknowledgement if a corresponding data packet was lost or arrived at the receiver with errors.

56. The receiver of claim 55 further comprising an error correction module configured to utilize retransmitted information to recover lost or erroneously received information.

57. The receiver of claim 53 wherein the communication module of the receiver is further configured to transmit the acknowledgment packets to the transmitter in a burst sequence over a low-rate wireless channel.

58. The receiver of claim 57 wherein the acknowledgement module is further configured to transmit the burst acknowledgments to the sender by directional transmission over the low-rate wireless channel.

59. The receiver of claim 58 wherein a received packet includes beamtracking information and the acknowledgement module is further configured to include beamtracking information in a corresponding acknowledgment packet.