Adaptive communication systems and methods

• US 7,630,489 B2
• Filed: 09/16/2004
• Issued: 12/08/2009
• Est. Priority Date: 09/16/2004
• Status: Active Grant

• Current Assignee: Intel Germany GmbH (Intel Corporation)
• Original Assignee: Infineon Technologies AG
• Inventors: Oksman, Vladimir, Heise, Bernd
• Primary Examiner(s): Jamal; Alexander
• Application Number:
  US10/943,171
• Publication Number:
  US 20060056305A1
• Time in Patent Office: 1,909 Days
• Field of Search: 379/392.01, 379/399.02, 375/240.27, 714/758
• US Class Current: 379/392.01
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27

Abstract

Methods and communication systems are presented, in which impulse noise is monitored on a communication channel, and impulse noise protection parameters are adjusted according to the monitored impulse noise without interrupting communication service.

Claims

1. A method for adaptive adjustment of a communication system, the method comprising:

monitoring impulse noise on a communication channel during communication service, wherein monitoring the impulse noise comprises;

monitoring data transfer errors occurring on the communication channel;

determining whether any of the data transfer errors are packetized errors; and

determining a number of corrected packetized errors and a number of uncorrected packetized errors; and

selectively adjusting impulse noise protection without interrupting the communication service by changing the impulse noise protection in a first manner if the number of uncorrected packetized errors is greater than an uncorrected packetized error threshold and changing the impulse noise protection in a second manner that differs from the first manner if the number of corrected packetized errors is less than a corrected packetized error threshold, wherein selectively adjusting the impulse noise protection comprises;

selectively increasing the impulse noise protection if there are uncorrected packetized errors during a relevant observation time that is less than a threshold time value;

selectively decreasing the impulse noise protection if there are no uncorrected packetized errors during the relevant observation time and if a number of corrected packetized errors is less than a threshold value during the relevant observation time; and

leaving the impulse noise protection unchanged if there are no uncorrected packetized errors during the relevant observation time and if the number of corrected packetized errors is greater than or equal to the threshold value during the relevant observation time.

2. The method of claim 1, wherein selectively increasing the impulse noise protection comprises at least one of increasing interleaving, increasing redundancy, and decreasing codeword size.

3. The method of claim 1, wherein selectively increasing the impulse noise protection comprises:

selectively increasing interleaving if possible within interleaving limits;

if increasing interleaving is not possible, selectively increasing a number of redundancy bytes if possible within redundancy limits; and

if increasing interleaving or redundancy is not possible, selectively decreasing codeword size if possible within codeword size limits.

4. The method of claim 1, wherein selectively decreasing the impulse noise protection comprises at least one of increasing codeword size, decreasing redundancy, and decreasing interleaving.

5. The method of claim 1, wherein selectively decreasing the impulse noise protection comprises:

selectively increasing codeword size if possible within codeword size limits;

if increasing codeword size is not possible, decreasing a number of redundancy bytes if possible within redundancy limits; and

if increasing codeword size is not possible and if decreasing the number of redundancy bytes is not possible, selectively decreasing interleaving if possible within interleaving limits.

6. The method of claim 1, further comprising:

monitoring continuous noise on the communication channel during the communication service; and

selectively adjusting continuous noise protection according to the continuous noise without interrupting the communication service, wherein the continuous noise protection and the impulse noise protection are adjusted in a coordinated fashion to minimize redundancy.

7. The method of claim 1, further comprising:

monitoring continuous noise on the communication channel during the communication service; and

selectively adjusting continuous noise protection according to the continuous noise without interrupting the communication service, wherein the continuous noise protection and the impulse noise protection are adjusted in a coordinated fashion to minimize redundancy.

8. A communication system, comprising:

a communication channel;

a first modem coupled with the communication channel, the first modem being adapted to monitor impulse noise and continuous noise on the communication channel during communication service and determine a number of corrected packetized errors and a number of uncorrected packetized errors during monitoring; and

a second modem coupled with the communication channel;

wherein the first and second modems are adapted to cooperatively adjust impulse noise protection and continuous noise protection without interrupting the communication service by changing the impulse noise protection in a first manner if the number of uncorrected packetized errors is greater than an uncorrected packetized error threshold and changing the impulse noise protection in a second manner that differs from the first manner if the number of corrected packetized errors is less than a corrected packetized error threshold,

wherein the first and second modems are adapted to cooperatively adjust the impulse noise protection and the continuous noise protection in a coordinated fashion to minimize redundancy,

wherein the first and second modems are adapted to selectively increase the impulse noise protection if there are uncorrected packetized errors on the communication channel during a relevant observation time that is less than a threshold time value, to selectively decrease the impulse noise protection if there are no uncorrected packetized errors on the communication channel and if a number of corrected packetized errors is less than a threshold value, and to leave the impulse noise protection unchanged if there are no uncorrected packetized errors on the communication channel and if the number of corrected packetized errors is greater than or equal to the threshold value.

9. The communication system of claim 8, wherein the first modem comprises:

a monitor system that monitors data transfer errors occurring on the communication channel; and

an analyzer system coupled with the monitor system, the analyzer system being adapted to determine whether any of the data transfer errors are packetized errors, and to determine whether any packetized errors are corrected or uncorrected.