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Method and apparatus of multicast service flow processing for headend cable modem

  • US 7,974,283 B2
  • Filed: 08/13/2008
  • Issued: 07/05/2011
  • Est. Priority Date: 12/10/2007
  • Status: Expired due to Fees
First Claim
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1. A method of processing a multicast service flow in a Cable Modem Termination System (CMTS), the method comprising:

  • classifying an inputted multicast packet by a session,wherein the classified multicast packet has a first service flow, which is based on the inputted multicast packet, andwherein the classified multicast packet has a first downstream-schedule, which is based on the first service flow of the inputted multicast packet;

    searching for an address of a service flow information table from a multicast lookup table including service flow address information corresponding to the classified multicast session;

    extracting internal header information including downstream service identifier information from the service flow information table;

    composing an internal header including multicast service flow information allocated to the classified session; and

    outputting an internal multicast packet including the internal header,wherein the internal multicast packet is outputted having the first downstream schedule, andwherein the internal multicast packet is outputted having a second service flow, which the internal multicast packet is outputted with a same scheme used for the downstream scheduling as if the first service flow was used, andwherein the first service flow is different than the second service flow.

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