Method of communication adapted to the transmission of data packets

• US 20080002659A1
• Filed: 06/20/2007
• Published: 01/03/2008
• Est. Priority Date: 06/30/2006
• Status: Active Grant

• Current Assignee: Thomson Licensing (Vantiva SA)
• Original Assignee: Thomson Licensing (Vantiva SA)
• Inventors: Jeanne, Ludovic, Fontaine, Patrick, Dore, Renaud
• Granted Patent: US 9,246,642 B2
• Time in Patent Office: Days
• US Class Current: 370/349
• 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. Method of communication adapted to the transmission of data packets, that can be transmitted according to various physical modes, wherein 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 said set.

2. 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 estimates the error rate on the basis of the said packets.

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

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

5. Method according to claim 1, wherein the estimation of the error rate comprises an error detection code verification step.

6. 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. Method according to claim 1, wherein it comprises a step of determining statistical data regarding error rates for packets received on the basis of the said estimation of the said packet error rate and of at least one parameter associated with a physical mode.

8. Method according to claim 7, wherein it comprises a step of 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. Method according to claim 1, wherein it comprises a step of estimating a signal-to-noise ratio on the basis of the said estimation of the said packet error rate and of at least one parameter associated with a physical mode.

10. Method according to claim 9, wherein it comprises a step of 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. Method according to any one of claim 1, wherein the said transmission of data packets is performed in accordance with a protocol of the IEEE 802.16 type.

12. Method according to claim 1, wherein it comprises a step of transmitting a physical mode modification request for the transmission of data packets.