Testing and verification of cable modem systems

• US 20040060069A1
• Filed: 09/25/2002
• Published: 03/25/2004
• Est. Priority Date: 09/25/2002
• Status: Abandoned Application

• Current Assignee: ADC Broadband Access Systems, Inc. (CommScope Holding Company, Inc.)
• Original Assignee: ADC Broadband Access Systems, Inc. (CommScope Holding Company, Inc.)
• Inventors: Abramson, Howard
• Application Number:
  US10/255,874
• Publication Number:
  US 20040060069A1
• Time in Patent Office: Days
• US Class Current: 725/110
• CPC Class Codes: H04N 17/00 Diagnosis, testing or measuring for television systems or their details
• CPC Class Codes: H04N 21/42676 for modulating an analogue carrier signal to encode digital information or demodulating it to decode digital information, e.g. ADSL or cable modem
• CPC Class Codes: H04N 21/6118 involving cable transmission, e.g. using a cable modem
• CPC Class Codes: H04N 21/6168 involving cable transmission, e.g. using a cable modem
• CPC Class Codes: H04N 21/64 Addressing network arrangements, protocols or services for addressing or naming H04L61/00; support for multicast or broadcast of one-way stream services H04L65/611
• CPC Class Codes: H04N 7/17309 Transmission or handling of upstream communications

Abstract

A method for testing a device of a cable modem system includes specifying a MAC address for the device under test, specifying one or more test messages for the devices under test, specifying a mode of failure for the messages, sending the messages to the device under test according to the failure mode and determining whether the device under test and other devices of the system respond correctly.

Claims

1. A method of testing one or more devices of a cable modem system, comprising:

specifying a MAC address for at least one device under test;

specifying one or more test messages for the at least one device under test;

specifying a mode of failure for the test messages;

sending the one or more test messages according to the mode of failure; and

determining whether one or more devices of the cable modem system respond appropriately.

2. The method of claim 1 further comprising specifying a change in value to standard timer.

3. The method of claim 1 wherein the message comprises a MAC Management Message.

4. The method of claim 1 wherein the message comprises a registration message.

5. The method of claim 1 wherein the message comprises a bandwidth request.

6. The method of claim 3 wherein the MAC Management Message comprises one or more Dynamic Service messages.

7. The method of claim 1 wherein the message comprises a registration message.

8. The method of claim 1 wherein the message comprises a bandwidth request.

9. The method of claim 1 wherein the mode of failure comprises skipping a message.

10. The method of claim 1 wherein the mode of failure comprises providing one or more messages outside the timing requirements specified by a standard.

11. The method of claim 1 wherein the test messages comprise flow control messages.

12. The method of claim 3 wherein the mode of failure is negative.

13. The method of claim 3 wherein the test comprises a negative test.

14. The method of claim 1 wherein the test may be performed on a plurality of devices under test at the same time.

15. The method of claim 1 wherein the devices under test comprise a cable modem.

16. The method of claim 1 wherein the devices under test comprise a cable modem termination system.

17. The method of claim 1 wherein the test includes modifying one or more timers associated with dynamic service messaging.

18. A method of testing one or more components of a cable modem system, the method comprising:

specifying one or more devices to test by a MAC number;

redefining a timer associated with a MAC management messaging state machine; and

measuring the response of the one or more devices under test to determine if there has been an anomaly.

19. The method of claim 18 wherein the MAC management message comprises a dynamic service message.

20. A method of testing one or more components of a cable modem system, the method comprising:

specifying one or more devices to test by MAC number;

transmitting one or more arbitrary messages to the device under test in response to received messages;

determining the response of the device under test.

21. The method of claim 20 wherein the messages comprise dynamic service messages.

22. The method of claim 20 wherein the messages comprise MAC management messages.

23. A method of testing one or more components of a cable modem system, the method comprising:

skipping one or more MAC Management Messages defined for one or more cable modems;

determining the response of the one or more cable modems for which the one or more MAC Management Messages was skipped.

24. The method of claim 23 further comprising determining the response of a cable modem termination system.

25. The method of claim 23 further comprising logging the responses.

26. The method of claim 23 further comprising identifying errors in the responses.

27. A system for testing one or more components of a cable modem system, comprising:

an interface to a cable modem system;

application software to monitor, read and write cable modem attributes and parameters via the interface;

agent software to receive cable modem and cable modem termination system messages from the interface and to respond to the messages; and

collection software to collect network objects or data variables that represent attributes of the managed agent.

28. The system of claim 27 further comprising a management information base.

29. The system of claim 27 wherein the agent software may be programmed to skip one or more messages.

30. The system of claim 27 wherein the agent software may be programmed to respond inappropriately to one or more messages.

31. A system for testing one or more components of a cable modem system, comprising:

an interface to a cable modem system wherein;

application software to monitor, read and write cable modem attributes and parameters via the interface;

agent software to receive cable modem and cable modem termination system messages from the interface and to respond to the messages wherein the agent software may be programmed to respond inappropriately to the messages; and

collection software to collect network objects or data variables that represent attributes of the managed agent.