Patents by Inventor Keil Brewer

Keil Brewer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Upstream channels for distributed CMTS
    Patent number: 11418450
    Abstract: A novel method of operating a Distributed Cable Modem Termination System is provided. Each branch CMTS node in a distributed CMTS supports a complete CMTS system and with full-spectrum ports. One or more MAC domains are defined at each branch CMTS node. A MAC domain defined at a branch CMTS node includes only service flows of the CMs that are connected to the branch CMTS node. Identifiers of service flows coming from a branch CMTS node are always unique, i.e., two different service flows of the branch CMTS would always have different SIDs, even if they belong to different MAC domains. On the other hand, service flows belonging to different branch CMTS nodes are free to reuse the same identifiers.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: August 16, 2022
    Assignee: VECIMA NETWORKS INC.
    Inventors: Keil Brewer, Rajamouli Gujjari, Philip Winterbottom
  • Upstream Channels for Distributed CMTS
    Publication number: 20170346740
    Abstract: A novel method of operating a Distributed Cable Modem Termination System is provided. Each branch CMTS node in a distributed CMTS supports a complete CMTS system and with full-spectrum ports. One or more MAC domains are defined at each branch CMTS node. A MAC domain defined at a branch CMTS node includes only service flows of the CMs that are connected to the branch CMTS node. Identifiers of service flows coming from a branch CMTS node are always unique, i.e., two different service flows of the branch CMTS would always have different SIDs, even if they belong to different MAC domains. On the other hand, service flows belonging to different branch CMTS nodes are free to reuse the same identifiers.
    Type: Application
    Filed: May 25, 2017
    Publication date: November 30, 2017
    Applicant: Alcatel-Lucent USA Inc.
    Inventors: Keil Brewer, Rajamouli Gujjari, Philip Winterbottom
  • Apparatus and methods for moving cable modems between upstream channels
    Patent number: 8201207
    Abstract: Disclosed are apparatus and methods for managing upstream channels on a per cable modem basis. In certain embodiments, one or more thresholds are defined for each of a plurality of upstream logical channels of a headend system for receiving data from a plurality of cable modems (or other types of access nodes). Each defined threshold corresponds to a measurable parameter of the corresponding upstream logical channel. One or more metrics are collected for each cable modem of each upstream logical channel. It is determined whether to downgrade a selected cable modem to a selected one of the logical channels that has a lower performance level than the selected cable modem's current logical channel.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: June 12, 2012
    Assignee: Cisco Technology, Inc.
    Inventors: James S. An, Hui Sun, De Fu Li, Keil Brewer, John J. Downey, Chrisanto D. Leano
  • APPARATUS AND METHODS FOR MOVING CABLE MODEMS BETWEEN UPSTREAM CHANNELS
    Publication number: 20100154017
    Abstract: Disclosed are apparatus and methods for managing upstream channels on a per cable modem basis. In certain embodiments, one or more thresholds are defined for each of a plurality of upstream logical channels of a headend system for receiving data from a plurality of cable modems (or other types of access nodes). Each defined threshold corresponds to a measurable parameter of the corresponding upstream logical channel. One or more metrics are collected for each cable modem of each upstream logical channel. It is determined whether to downgrade a selected cable modem to a selected one of the logical channels that has a lower performance level than the selected cable modem's current logical channel.
    Type: Application
    Filed: December 15, 2008
    Publication date: June 17, 2010
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: James S. An, Hui Sun, De Fu Li, Keil Brewer, John J. Downey, Chrisanto D. Leano