Data Transmission And Retransmission

• US 20080248758A1
• Filed: 04/04/2007
• Published: 10/09/2008
• Est. Priority Date: 04/04/2007
• Status: Active Grant

• Current Assignee: Maxlinear Incorporated
• Original Assignee: Infineon Technologies AG
• Inventors: Schedelbeck, Gert, Heise, Bernd
• Granted Patent: US 9,686,045 B2
• Time in Patent Office: Days
• US Class Current: 455/69
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/1614 using bitmaps
• CPC Class Codes: H04L 1/1635 Cumulative acknowledgement, i.e. the acknowledgement message applying to all previous messages
• CPC Class Codes: H04L 1/1874 Buffer management

Abstract

A method transmits data. The method includes transmitting a series of data unit, receiving a retransmission request indicating a plurality of corrupt data units in the transmitted data units which were not received correctly, and retransmitting the corrupted data units.

Claims

1. A method of transmitting data, comprising:

transmitting a series of data units;

receiving a retransmission request indicating a plurality of corrupt data units in the transmitted data units which were not received correctly; and

retransmitting the corrupted data units.

2. The method according to claim 1, wherein the transmitting comprises providing each data unit with an identifier.

3. The method according to claim 2, wherein the retransmission request comprises an identifier of a first one of the plurality of corrupt data units and an identifier of a last one of the plurality of corrupt data units.

4. The method according to claim 2, wherein the retransmission request comprises an identifier of one of the data units and information indicating the corrupt data units relative to the one data unit.

5. The method according to claim 4, wherein the information comprises a bit pattern.

6. The method according to claim 1, wherein the retransmitting comprises updating a variable after each retransmitted corrupt data unit, the variable indicating which corrupt data units have been retransmitted.

7. The method according to claim 1, comprising:

determining if the retransmission request is corrupt; and

ignoring the retransmission request if the retransmission request is corrupt.

8. The method according to claim 1, wherein the method is performed in a physical layer of a transmitter.

9. The method according to claim 1, comprising:

forming the data units by interleaving;

wherein the receiving and retransmitting are performed downstream of the interleaving.

10. The method according to claim 1, wherein the data units are one of discrete multi-tone modulated data units and orthogonal frequency division multiplex data units.

11. A data transmitter comprising:

a transmission circuit configured to transmit a series of data units;

a receiver circuit configured to receive a retransmission request indicating a plurality of corrupt data units in the transmitted series of data units; and

a retransmission control circuit coupled to the receiver circuit and the transmission circuit, the retransmission control circuit configured to control the transmission circuit to retransmit data units depending on the retransmission request.

12. The data transmitter according to claim 11, wherein the transmission circuit is configured to provide each data unit with an identifier.

13. The data transmitter according to claim 12, wherein the retransmission request comprises an identifier of a first one of the plurality of corrupt data units and an identifier of a last one of the plurality of corrupt data units.

14. The data transmitter according to claim 12, wherein the retransmission request comprises an identifier of one of the data units and information indicating the corrupt data units relative to the one data unit.

15. The data transmitter according to claim 14, wherein the information comprises a bit pattern.

16. The data transmitter according to claim 11, wherein the retransmission control circuit comprises a state machine.

17. The data transmitter according to claim 16, wherein the state machine assumes first states if retransmission requests are received correctly and assumes second states if corrupt retransmission requests are received.

18. The data transmitter according to claim 16, wherein states of the state machine update a variable after each retransmitted corrupt data unit, the variable indicating which corrupt data units have been retransmitted.

19. The data transmitter according to claim 11, wherein the transmission circuit comprises an interleaver, wherein the retransmission control circuit is configured to control the transmission circuit downstream of the interleaver.

20. The data transmitter according to claim 11, wherein the transmission circuit comprises one of a discrete multi-tone modulator and an orthogonal frequency division multiplex modulator.

21. A data receiver comprising:

a receiver circuit configured to receive data units;

a monitoring circuit coupled to the receiver circuit and configured to determine if a received data unit is received correctly; and

a request transmission circuit coupled to the monitoring circuit and configured to transmit retransmission requests to a transmitter of the data units, the retransmission requests indicating a plurality of corrupt data units which the monitoring circuit determined were not received correctly.

22. The data receiver according to claim 21, wherein each of the data units comprises an identifier identifying the respective data unit.

23. The data receiver according to claim 22, wherein the retransmission request comprises an identifier of a first one of the plurality of corrupt data units and an identifier of a last one of the plurality of corrupt data units.

24. The data receiver according to claim 22, wherein the retransmission request comprises an identifier of one of the data units and information indicating the corrupt data units relative to the one data unit.

25. The data receiver according to claim 22, wherein the information comprises a bit pattern.

26. The data receiver according to claim 21, comprising:

a deinterleaver downstream of the monitoring circuit and the receiver circuit.

27. A method of transmitting data, comprising:

transmitting a series of data units;

receiving at least one retransmission request indicating at least one corrupt data unit in the transmitted series of data units which was not received correctly;

analyzing the at least one retransmission request to detect a periodic pattern of corrupt data units; and

retransmitting further data units corresponding to the periodic pattern.

28. The method according to claim 27, wherein the retransmitting the further data units is performed independently of retransmission requests requesting retransmission of the further data units.

29. A method, comprising:

transmitting a retransmission request requesting retransmission of at least one data unit prior to receiving the at least one data unit.

30. The method according to claim 29, comprising:

receiving data units;

determining for each of the data units, if the data unit is a corrupt data unit which has not been received correctly; and

wherein the retransmission request further requests retransmission of the corrupt data units.

31. The method according to claim 29, comprising:

determining the at least one data unit based on periodic patterns of corrupt data units in previously received data units.

32. A data transmitter comprising:

means for transmitting a series of data units;

means for receiving a retransmission request indicating at least one corrupt data unit in the transmitted series of data units was not received correctly; and

means for controlling the means for transmitting to retransmit data units based on the retransmission request.