Method of communication adapted to the transmission of data packets

• US 9,246,642 B2
• Filed: 06/20/2007
• Issued: 01/26/2016
• Est. Priority Date: 06/30/2006
• Status: Active Grant

• Current Assignee: Thomson Licensing (Vantiva SA)
• Original Assignee: Thomson Licensing (Vantiva SA)
• Inventors: Fontaine, Patrick, Dore, Renaud, Jeanne, Ludovic
• Primary Examiner(s): Patel, Jay P
• Application Number:
  US11/820,981
• Publication Number:
  US 20080002659A1
• Time in Patent Office: 3,142 Days
• Field of Search: 370/252, 370/437, 370/465, 370/474
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0034 where the transmitter decides based on inferences, e.g. use of implicit signalling
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: H04L 2001/0092 Error control systems characterised by the topology of the transmission link

Abstract

The invention relates to a method of communication adapted to the transmission of data packets that can be transmitted according to various physical modes.

In order to optimize transmission, the method comprises the following steps:

• • reception of packets, each packet being sent in at least one radio burst associated with a physical mode chosen from a set of at least two physical modes;
  • estimation of the packet error rate for each physical mode of the set.

Claims

1. A method of communication adapted to the transmission of data packets that can be transmitted according to various physical modes, wherein the method comprises:

receiving a sub-frame comprising a plurality of bursts, each burst being associated with a different physical mode;

determining a packet error rate for each physical mode associated with said bursts, the determination being based on at least a burst of said plurality of bursts comprising at least a first MAC level packet intended for the apparatus performing the determination and on at least a burst of said plurality of bursts comprising at least a second MAC level packet not intended for said apparatus; and

selecting a physical mode based on the determined packet error rate.

2. The method according to claim 1, wherein at least some of the packets received are not intended for the apparatus that receives the said packets and determines the packet error rate on the basis of the said packets.

3. The method according to claim 1, wherein the said physical mode comprises the modulation.

4. The method according to claim 1, wherein the said physical mode comprises the rate or the type of an error correcting code.

5. The method according to claim 1, wherein the determination of the error rate comprises an error detection code verification step.

6. The method according to claim 5, wherein it comprises a step of transmitting a cue representative of the said packet error rate for at least some of the physical modes of the said set, the said cue representative of the said rate being transmitted to a station that is able to send radio bursts.

7. The method according to claim 1, further comprising determining statistical data regarding error rates for packets received on the basis of the said determination of the said packet error rate and of at least one parameter associated with a physical mode.

8. The method according to claim 7, further comprising transmitting cues representative of the said statistical data, the said cues representative of the said statistical data being transmitted to a station that is able to send radio bursts.

9. The method according to claim 1, further comprising determining a signal-to-noise ratio on the basis of the said determination of the said packet error rate and of at least one parameter associated with a physical mode.

10. The method according to claim 9, further comprising transmitting data representative of a signal-to-noise ratio for at least some of the physical modes of the said set, the data representative of a signal-to-noise ratio being transmitted to a station that is able to send radio bursts.

11. The method according to claim 1, wherein the said transmission of data packets is performed in accordance with a protocol of the IEEE 802.16 type.

12. The method according to claim 1, further comprising transmitting a physical mode modification request for the transmission of data packets.

13. A communication device adapted to the reception of data packets that can be transmitted according to various physical modes, wherein the communication device comprises:

a receiver configured to receive a sub-frame comprising a plurality of bursts, each burst being associated with a different physical mode;

a processor configured to determine the packet error rate for each physical mode associated with said bursts, the determination being based on at least a burst of said plurality of bursts comprising at least a first MAC level packet intended for the apparatus performing the determination and on at least a burst of said plurality of bursts comprising at least a second MAC level packet not intended for said apparatus, the processor being further configured to select one of the physical modes based on the determined packet error rate.

14. The communication device according to claim 13, wherein at least some of the packets received are not intended for the apparatus performing the determination of the packet error rate on the basis of the said packets.

15. The communication device according to claim 13, wherein said physical mode comprises the modulation.

16. The communication device according to claim 13, wherein said physical mode comprises the rate or the type of an error correcting code.

17. The communication device according to claim 13, wherein the processor is further configured to verify an error detection code.

18. The communication device according to claim 13, further comprising a transmitter configured to transmit a cue representative of said packet error rate for at least some of the physical modes of said set, said cue representative of said rate being transmitted to a station that is able to send radio bursts.

19. The communication device according to claim 13, wherein the processor is further configured to determine statistical data regarding error rates for packets received on the basis of said determination of said packet error rate and of at least one parameter associated with a physical mode.

20. The communication device according to claim 19, further comprising a transmitter configured to transmit cues representative of said statistical data, said cues representative of said statistical data being transmitted to a station that is able to send radio bursts.

21. The communication device according to claim 13, wherein the processor is further configured to determine a signal-to-noise ratio on the basis of the determination of said packet error rate and of at least one parameter associated with a physical mode.

22. The communication device according to claim 21, further comprising a transmitter configured to transmit data representative of a signal-to-noise ratio for at least some of the physical modes of said set, the data representative of a signal-to-noise ratio being transmitted to a station that is able to send radio bursts.

23. The communication device according to claim 13, wherein said transmission of data packets is performed in accordance with a protocol of the IEEE 802.16 type.

24. The communication device according to claim 13, further comprising a transmitter configured to transmit a physical mode modification request for the transmission of data packets.

25. A communication device adapted to the reception of data packets that can be transmitted according to various physical modes, wherein the communication device comprises:

a receiver configured to receive a sub-frame comprising a plurality of bursts, each burst being associated with a different physical mode;

a processor configured to determine the packet error rate for each physical mode associated with said bursts, the determination being based on at least a burst of said plurality of bursts comprising at least a first MAC level packet intended for the apparatus performing the determination and on at least a burst of said plurality of bursts comprising at least a second MAC level packet not intended for said apparatus, and the processor configured to select one of the physical modes based on the determined packet error rate.