System and method for adjusting BER/PER to increase network stream-based transmission rates

• US 20070033496A1
• Filed: 05/04/2006
• Published: 02/08/2007
• Est. Priority Date: 07/14/2005
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Cooklev, Todor, Tavares, Clifford
• Application Number:
  US11/429,020
• Publication Number:
  US 20070033496A1
• Time in Patent Office: Days
• US Class Current: 714/776
• CPC Class Codes: H04L 1/0017 where the mode-switching is based on Quality of Service requirement
• CPC Class Codes: H04L 1/1838 for semi-reliable protocols, e.g. for less sensitive applications such as streaming video buffer level management for video bitstream receiver H04N21/44004

Abstract

A transmitting method obtains a data packet of a data-type to be transmitted via a computer network to a receiving system; appends a retry flag to the data packet, the retry flag based on the data-type, the retry flag indicating whether the receiving system may attempt a retransmission; and transmits the data packet to the receiving system. When the data-type is one of voice, video or audio data, the retry flag may indicate that the receiving system should not attempt retransmission. The method may also comprise appending an error-correction algorithm ID based on the data-type to the data packet. A receiving method receives the data packet; and when a bit or packet error is identified then initiating a retransmission if the retry flag so commands. When the retry flag indicates that a retransmission should not occur, the receiving method may initiate an error correction algorithm identified in the data packet.

Claims

1. A method comprising:

obtaining a data packet of a data-type to be transmitted via a computer network to a receiving system;

appending a retry flag to the data packet, the retry flag being based on the data-type, the retry flag indicating whether the receiving system should attempt a retransmission when an error is presumed in the data packet; and

transmitting the data packet with the appended retry flag via the computer network to the receiving system.

2. The method of claim 1, wherein the data-type is one of voice, video or audio data, and the retry flag indicates that the receiving system should not attempt retransmission when an error is presumed in the data packet.

3. The method of claim 1, further comprising appending error-detection information to the data packet, the error-detection information to be used for validation against the data packet by the receiving system, a failure of validation enabling the receiving system to presume an error in the data packet.

4. The method of claim 3, wherein the error-detection information includes CRC information.

5. The method of claim 1, further comprising appending an error-correction algorithm ID to the data packet.

6. The method of claim 5, further comprising selecting the error-correction algorithm ID to be appended to the data packet based on the data-type.

7. The method of claim 1, further comprising

using an error-correction algorithm to generate error-correction information associated with the data packet, the error-correction information intended to enable the receiving system to correct an error presumed in the data packet;

and

transmitting the error-correction information associated with the data packet to the receiving system.

8. A system comprising:

an upper layer communication module for obtaining a data packet of a data-type to be transmitted via a computer network to a receiving system;

a header encoder for appending a retry flag to the data packet, the retry flag being based on the data-type, the retry flag indicating whether the receiving system should attempt a retransmission when an error is presumed in the data packet; and

a physical layer for transmitting the data packet with the appended retry flag via the computer network to the receiving system.

9. The system of claim 8, wherein the data-type is one of voice, video or audio data, and the retry flag indicates that the receiving system should not attempt retransmission when an error is presumed in the data packet.

10. The system of claim 8, wherein the header encoder appends error-detection information to the data packet, the error-detection information to be used for validation against the data packet by the receiving system, a failure of validation enabling the receiving system to presume an error in the data packet.

11. The system of claim 10, wherein the error-detection information includes CRC information.

12. The system of claim 8, wherein the header encoder appends an error-correction algorithm ID to the data packet.

13. The system of claim 12, wherein the header encoder accesses a QoS model defining which error-correction algorithm ID to append to the data packet based on the data-type.

14. The system of claim 8,

further comprising an error-correction module for using an error-correction algorithm to generate error-correction information associated with the data packet, the error-correction information intended to enable the receiving system to correct an error presumed in the data packet;

and

wherein the physical layer transmits the error-correction information associated with the data packet to the receiving system.

15. A method comprising:

receiving a data packet having error-detection information and a retry flag;

validating the error-detection information against the data packet;

when the error-detection information fails to validate, presuming that the data packet contains an error; and

when presuming that the data packet contains an error, initiating a retransmission if the retry flag indicates that a retransmission should occur and not initiating a retransmission if the retry flag indicates that a retransmission should not occur.

16. The method of claim 15, further comprising

when presuming that the data packet contains an error and the retry flag indicates that a retransmission should not occur, initiating an error correction algorithm to attempt to correct the error.

17. The method of claim 16, wherein the data packet has an error-correction algorithm ID that identifies the error correction algorithm.

18. A system comprising:

a physical layer for receiving a data packet having error-detection information and a retry flag;

an error checking module for validating the error-detection information against the data packet and presuming that the data packet contains an error when the error-detection information fails to validate;

a retransmission manager for initiating a retransmission when presuming that the data packet contains an error and the retry flag indicates that a retransmission should occur, and not initiating a retransmission when presuming that the data packet contains an error and the retry flag indicates that a retransmission should not occur.

19. The system of claim 18, further comprising an error correction module for initiating an error correction algorithm to attempt to correct the error when presuming that the data packet contains an error and the retry flag indicates that a retransmission should not occur.

20. The system of claim 18, wherein the data packet has an error-correction algorithm ID that identifies the error correction algorithm.