×

Methods for detecting and polling downstream modems

  • US 20030076809A1
  • Filed: 07/25/2002
  • Published: 04/24/2003
  • Est. Priority Date: 08/03/2001
  • Status: Abandoned Application
First Claim
Patent Images

1. A method for discovering an address of a currently undiscovered device with an N-bit address on a shared media with a downstream channel and an upstream channel, the method comprising:

  • A. Sending a first type message on the downstream channel;

    B. Interpreting a response occurring on the upstream channel as confirmation of the existence of at least one undiscovered device;

    C. Discerning the address of at least one of the responding undiscovered devices by;

    i. Sending a second type message on the downstream channel, the second type message containing an address field with a most significant bit set to 1 and the rest of the bits set to 0;

    ii. If a response comes back on the upstream channel, then the most significant bit is set to 1, else the most significant bit is set to 0;

    iii. Setting MSB Index=2;

    iv. FOR MSB Index less than N;

    a. Sending a subsequent second type message with the previously discerned value(s) for the one or more most significant bits with the next most significant bit set to 1 and any remaining bits set to 0;

    b. If a response comes back on the upstream channel, then the next most significant bit is set to 1, else the next most significant bit is set to 0; and

    v. Increment MSB Index=MSB Index+1; and

    D. Sending an instruction to the newly discovered device through use of the discerned address to instruct the discovered device to not respond to subsequent first type messages.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×