The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 15, 2001
Filed:
Nov. 01, 1999
Timothy M. Burke, Norton, MA (US);
Richard J. Corrigan, Palatine, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A system (,) and method for packet telephony power management of a cable distribution network (,), i.e., a hybrid fiber coax (HFC) communication system, for internet protocol (IP) packet telephony information between multiple cable modem subscriber units (,) communicated over a public switch telephone network (PSTN) (,) with at least one router (,), e.g., a cable modem termination system (CMTS) on a communication network backbone. Power management is provided to minimize power consumption on the IP telephony distribution system (,) supporting line-powered cable-modem subscriber units (,). The power saving techniques are supported using a virtual broadcast channel (VBC) (,) provided in the packet telephony system using an alert queue (,). The alert queue (,) is established and segmented into a plurality of phases for selective activation, each phase having memory buffers for buffering packet telephony information communicated via the CMTSs (,). The multiple cable modem subscriber units (,) are divided into a plurality of alert phase groups, each alert phase group being associated with one of the plurality of phases of the alert queue. The VBC (,) may then be provided between the CMTS (,) and the subscriber units (,) for transmitting control information.