System for DSL modem type identification

• US 7,349,963 B2
• Filed: 11/04/2004
• Issued: 03/25/2008
• Est. Priority Date: 11/04/2004
• Status: Expired due to Fees

• Current Assignee: Assia Spe LLC
• Original Assignee: Adaptive Spectrum and Signal Alignment, Incorporated
• Inventors: Rhee, Wonjong, Almandoz, Iker, Chen, Chiang-yu
• Primary Examiner(s): Caldwell; Andrew
• Assistant Examiner(s): BIAGINI, CHRISTOPHER D
• Application Number:
  US10/981,068
• Publication Number:
  US 20060095565A1
• Time in Patent Office: 1,237 Days
• Field of Search: 709/224
• US Class Current: 709/224
• CPC Class Codes: H04L 41/00 Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
• CPC Class Codes: H04L 41/0213 Standardised network management protocols, e.g. simple network management protocol [SNMP]
• CPC Class Codes: H04L 41/046 comprising network management agents or mobile agents therefor

Abstract

Operational data collected from a communication system, such as a DSL system, may include exclusionary data and/or indicative data that can be analyzed to determine the type of communication device, such as a DSL modem, that generated the operational data. Exclusionary data, if any, can be used to exclude one or more communication device types from consideration. Indicative data, if any, may be used to influence the selection of a communication device type, such as by assigning scores to communication device type features and/or to communication device types. Information pertaining to various communication devices may be maintained in a database or the like. In a DSL system, modem types may be evaluated and selected by a modem identification unit or identifier that collects and analyzes the operational data using collecting means and identifying means. The identifier may be part of a controller, such as a DSM Center or the like implemented in and/or with a computer and coupled to the DSL system. Information such as a modem type selection then can be used by the controller to generate modem and/or system operation signals to assist in operation of the DSL system.

Claims

1. A method of identifying a type of Digital Subscriber Line (“

DSL”

) modem operating at a first end of a DSL system, wherein the DSL system comprises the first end DSL modem coupled to a second end DSL modem by a DSL line, the method comprising;

collecting operational data comprising at least one of performance-characterizing data available from a DSL system element management protocol, management level data from the DSL system, data collected from a DSL network management system, data collected from a DSL management entity, and data collected from a DSL management information base;

creating a list of candidate DSL modem types;

comparing one or more characteristics of the collected operational data to operational data characteristics of known DSL modem types to exclude one or more unavailable DSL modem types from the list of candidate DSL modem types;

comparing one or more characteristics of the collected operational data to the operational data characteristics of known DSL modem types to assign scores to available DSL modem types remaining on the list of candidate DSL modem types; and

identifying the first end DSL modem type by selecting the available DSL modem type from the remaining list of candidate DSL modem types that has the highest score.

2. The method of claim 1 wherein the operational data comprises data reflecting features of the DSL modem type.

3. The method of claim 1 implemented by a controller.

4. The method of claim 1 further comprising:

generating control signals for the DSL system based on the identified DSL modem type.

5. The method of claim 1 wherein the operational data comprises exclusionary data, indicative data, or both, the exclusionary data comprising describing an assured characteristic, the indicative data describing a likely characteristic;

wherein the method further comprises;

removing from the list of candidate DSL modem types each candidate DSL modem type known to not exhibit the assured characteristic; and

improving the score of each candidate DSL modem type within the list of candidate DSL modem types known to exhibit the likely characteristic.

6. The method of claim 5 wherein the exclusionary data is selected from the group comprising:

pilot tone location data;

data about reported number of bits in the pilot tone;

medium-delay interleaved profiles operation data; and

power back-off data.

7. The method of claim 5 wherein the indicative data is selected from the group of features comprising:

downstream attenuation stability;

upstream attenuation stability;

upstream transmit power compared to the number of used tones in upstream transmissions;

downstream transmit power compared to the number of used tones in downstream transmissions;

sharpness of upstream bit distribution rising and falling edges;

sharpness of downstream bit distribution rising and falling edges;

downstream attenuation with respect to upstream attenuation;

a maximum number of bits loaded per tone;

abnormal margin values;

differences between a current data rate and a maximum attainable data rate for upstream transmissions; and

differences between a current data rate and a maximum attainable data rate for downstream transmissions.

8. A method for determining a type of a Digital Subscriber Line (“

DSL”

) modem, the method comprising;

collecting operational characteristics associated with the DSL modem;

comparing at least one of the operational characteristics with known operational characteristics corresponding to a list of possible DSL modem types;

assigning a score to each possible modem type based on the comparison of the at least one operational characteristic and the known operational characteristics; and

determining the type of the DSL modem by selecting the DSL modem type with the highest score from the list of possible DSL modem types.

9. The method of claim 8 wherein the operational characteristics include one or more of performance data from a DSL management protocol, management data from a DSL system, configuration data from a DSL network management system, fault data from the DSL network management system, and information from a DSL Management Information Base (“

MIB”

).

10. The method of claim 8 further comprising:

creating the list of possible DSL modem types and correlating the list with the known operational parameters for each possible DSL modem type contained within the list.

11. The method of claim 8 wherein each operational characteristic comprises an exclusionary attribute describing an assured characteristic for one or more of the possible DSL modem types, or an indicative attribute describing a likely characteristic for the one or more of the possible DSL modem types, the method further comprising:

removing from the list of possible DSL modem types each possible DSL modem type known to not exhibit the assured characteristic; and

improving the score of each possible DSL modem type within the list of possible DSL modem types known to exhibit the likely characteristic.

12. The method of claim 9 wherein the exclusionary attribute is selected from the group comprising:

pilot tone location;

pilot tone bit count;

medium-delay profile, and power back-off attribute; and

wherein the indicative attribute is selected from the group comprising;

downstream attenuation stability;

upstream attenuation stability;

ratio of upstream transmit power to number of used tones in upstream transmissions;

ratio of downstream transmit power to used tones in downstream transmissions;

sharpness of upstream bit distribution rising and falling edges;

sharpness of downstream bit distribution rising and falling edges;

ratio of downstream attenuation to upstream attenuation;

a maximum number of bits loaded per tone;

abnormal margin values;

differences between a current data rate and a maximum attainable data rate for upstream transmissions; and

differences between the current data rate and a maximum attainable data rate for downstream transmissions.

13. The method of claim 8 further comprising:

generating control signals for the DSL modem based on the selected DSL modem type.

14. The method of claim 8 further comprising:

collecting updated operational characteristics associated with the DSL modem on an ongoing basis; and

re-determining the type of the DSL modem by selecting the DSL modem type with an updated highest score, the updated highest score based on an updated comparison of the updated operational characteristics with the known operational characteristics.

15. The method of claim 8 wherein the known operational characteristics are stored in a database.

16. The method of claim 8 wherein the operational characteristics are selected from the group comprising:

upstream bit distribution;

downstream bit distribution;

upstream transmit power;

downstream transmit power;

upstream Signal-to-Noise Ratio (“

SNR”

) margin;

downstream SNR margin;

present upstream data rate;

present downstream data rate;

upstream maximum attainable data rate;

downstream maximum attainable data rate;

upstream relative capacity;

downstream relative capacity;

upstream attenuation;

downstream attenuation;

upstream ATM cell count;

downstream ATM cell count;

profile information;

upstream Code Violation (“

CV”

) count;

downstream CV count;

upstream Forward Error Correction (“

FEC”

) count;

downstream FEC count;

Loss Of Signal (“

LOS”

) count;

upstream Errored Seconds (“

ES”

);

downstream ES;

upstream Severely Errored Seconds (“

SES”

); and

downstream SES.

17. The method of claim 8 wherein the operational characteristics are collected directly or indirectly from a second DSL modem communicatively connected with the first DSL modem.

18. A computing device communicatively connected with a Digital Subscriber Line (“

DSL”

) modem, the computing device comprising a machine-readable medium having instructions stored thereon that, when executed by a processor, cause the processor to perform operations comprising;

collecting operational characteristics associated with the DSL modem;

comparing at least one of the operational characteristics with known operational characteristics corresponding to a list of possible DSL modem types;

assigning a score to each possible modem type based on the comparison of the at least one operational characteristic with the known operational characteristics; and

determining the type of the DSL modem by selecting the DSL modem type with the highest score from the list of possible DSL modem types.

19. The computing device of claim 18 wherein each operational characteristic comprises an exclusionary attribute describing an assured characteristic for one or more of the possible DSL modem types, or an indicative attribute describing a likely characteristic for the one or more of the possible DSL modem types, the method further comprising:

removing from the list of possible DSL modem types each possible DSL modem type known to not exhibit the assured characteristic; and

improving the score of each possible DSL modem type within the list of possible DSL modem types known to exhibit the likely characteristic.

20. The computing device of claim 18 wherein the computing device further comprises a DSL system controller.

21. The computing device of claim 18 wherein the instructions cause the processor to perform further operations comprising:

generating control signals for the DSL modem based on the selected DSL modem type.

22. A Digital Subscriber Line (“

DSL”

) system comprising;

a first DSL modem to connect with a second DSL modem via a DSL line; and

a controller communicatively connected with the first DSL modem, the controller comprising;

means for collecting operational characteristics associated with the second DSL modem,

means for comparing at least one of the operational characteristics with known operational characteristics corresponding to a list of possible DSL modem types,

means for assigning a score to each possible modem type based on the comparison of the at least one operational characteristic and the known operational characteristics, and means for determining the type of the second DSL modem by selecting the DSL modem type with the highest score from the list of possible DSL modem types.

23. The DSL system of claim 22 further comprising:

means for creating the list of possible DSL modem types and correlating the list with the known operational parameters for each possible DSL modem type contained within the list; and

means for storing the list of possible DSL modem types, wherein the list is accessible to the controller.

24. The DSL system of claim 22 wherein each operational characteristic comprises an exclusionary attribute describing an assured characteristic for one or more of the possible DSL modem types, or an indicative attribute describing a likely characteristic for the one or more possible DSL modem types, the method further comprising:

removing from the list of possible DSL modem types each possible DSL modem type known to not exhibit the assured characteristic; and

improving the score of each possible DSL modem type within the list of possible DSL modem types known to exhibit the likely characteristic.

25. The DSL system of claim 22 further comprising:

means for generating control signals for the second DSL modem based on the selected DSL modem type.

26. The DSL system of claim 22 wherein collecting operational characteristics associated with the second DSL modem comprises receiving the operational characteristics from the first DSL modem.