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AssigneeCisco Technology, Inc.
InventorsJoanna Qun Zang, Feisal Daruwalla, James R. Forster, Guenter E. Roeck, Joseph O'Donnell, John Chen, Mark Millet
Estimating the term…
A CMTS redundancy technique requires at least two CMTS interfaces (e.g., line cards) on one or more CMTS chassis at the head end of a cable network. One of the CMTSs serves as a backup or “protecting” CMTS. When another CMTS (a “working” CMTS) becomes unavailable to service its group of cable modems, the protecting CMTS takes over service to those cable modems. The SWITCHOVER takes place transparently (or nearly transparently) to the cable modems. The protecting CMTS provides service on the same downstream channel as used by the working CMTS. The cable modems need not modify any settings pursuant to their cable modem communication protocol (e.g., DOCSIS ranging). This transparency to the cable modems is realized by keeping the working and protecting CMTSs in synchronization regarding service parameters for the cable modems. In other words, the protecting CMTS maintains a list of current parameters for allowing service to the cable modems.
A method of providing backup service to a group of cable modems on a cable network having a working CMTS providing service to the group of cable modems and having a protecting CMTS available to take over service to the group of cable modems, the method comprising:
A method of providing backup service to a group of cable modems on a cable network having a working CMTS providing service to the group of cable modems and having a protecting CMTS available to take over service to the group of cable modems, the method comprising:
A method of providing backup service to a group of cable modems on a cable network having a working CMTS providing service to the group of cable modems and having a protecting CMTS available to take over service to the group of cable modems, the method comprising:
A method of providing backup service to a group of cable modems on a cable network having a working CMTS providing service to the group of cable modems and having a protecting CMTS available to take over service to the group of cable modems, the method comprising:
A method of providing backup service to a group of cable modems on a cable network having a working CMTS providing service to the group of cable modems and having a protecting CMTS available to take over service to the group of cable modems, the method comprising:
CMTS apparatus capable of acting as a protecting CMTS on a cable network having a group of cable modems to be serviced by a working CMTS, such that when the working CMTS becomes unavailable, the protecting CMTS can take over service to the group of modems, the CMTS apparatus comprising:
CMTS apparatus capable of acting as a protecting CMTS on a cable network having a group of cable modems to be serviced by a working CMTS, such that when the working CMTS becomes unavailable, the protecting CMTS can take over service to the group of modems, the CMTS apparatus comprising:
CMTS apparatus capable of acting as a protecting CMTS on a cable network having a group of cable modems to be serviced by a working CMTS, such that when the working CMTS becomes unavailable, the protecting CMTS can take over service to the group of modems, the CMTS apparatus comprising:
A computer program product comprising a machine readable medium on which is provided instructions for providing backup service to a group of cable modems on a cable network having a working CMTS providing service to the group of cable modems and having a protecting CMTS available to take over service to the group of cable modems, the instructions comprising:
A computer program product comprising a machine readable medium on which is provided instructions for providing backup service to a group of cable modems on a cable network having a working CMTS providing service to the group of cable modems and having a protecting CMTS available to take over service to the group of cable modems, the instructions comprising:
A computer program product comprising a machine readable medium on which is provided instructions for providing backup service to a group of cable modems on a cable network having a working CMTS providing service to the group of cable modems and having a protecting CMTS available to take over service to the group of cable modems, the instructions comprising:
CMTS apparatus capable of acting as a working CMTS on a cable network having a group of cable modems to be serviced by the working CMTS, such that when the working CMTS becomes unavailable, a protecting CMTS can take over service to the group of cable modems, the CMTS apparatus comprising:
CMTS apparatus capable of acting as a working CMTS on a cable network having a group of cable modems to be serviced by the working CMTS, such that when the working CMTS becomes unavailable, a protecting CMTS can take over service to the group of cable modems, the CMTS apparatus comprising:
A method of providing working service to a group of cable modems on a cable network having a working CMTS providing service to the group of cable modems and having a protecting CMTS available to take over service to the group of cable modems, the method comprising:
A method of providing working service to a group of cable modems on a cable network having a working CMTS providing service to the group of cable modems and having a protecting CMTS available to take over service to the group of cable modems, the method comprising:
A method of providing working service to a group of cable modems on a cable network having a working CMTS providing service to the group of cable modems and having a protecting CMTS available to take over service to the group of cable modems, the method comprising:
A computer program product comprising a machine readable medium on which is provided instructions for providing working service to a group of cable modems on a cable network having a working CMTS providing service to the group of cable modems and having a protecting CMTS available to take over service to the group of cable modems, the instructions comprising:
A computer program product comprising a machine readable medium on which is provided instructions for providing working service to a group of cable modems on a cable network having a working CMTS providing service to the group of cable modems and having a protecting CMTS available to take over service to the group of cable modems, the instructions comprising:
A method of providing backup service to a group of network nodes on a network having a working headend device providing service to the group of network nodes and having a protecting headend device available to take over service to the group of network nodes, the method comprising:
Dependencies are inferred from the claim text.