Source: http://www.google.com/patents/US7688828?dq=5,646,839
Timestamp: 2014-07-23 10:01:57
Document Index: 400474910

Matched Legal Cases: ['application No. 60', 'application No. 60', 'application No. 60', 'application No. 60', 'application No. 60', 'application No. 60', 'application No. 60', 'application No. 60', 'art 2', 'art 16']

Patent US7688828 - Downstream remote physical interface for modular cable modem termination system - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA modular Cable Modem Termination System (CMTS) includes a packet shelf operating a Data Over Cable Service Interface Specifications (DOCSIS) Media Access Control (MAC) framer. One or more downstream Physical Interface (PHY) shelves receive DOCSIS data from the packet shelf over a packet switched network...http://www.google.com/patents/US7688828?utm_source=gb-gplus-sharePatent US7688828 - Downstream remote physical interface for modular cable modem termination systemAdvanced Patent SearchPublication numberUS7688828 B2Publication typeGrantApplication numberUS 11/134,589Publication dateMar 30, 2010Filing dateMay 17, 2005Priority dateJun 27, 2001Fee statusPaidAlso published asUS20050265338Publication number11134589, 134589, US 7688828 B2, US 7688828B2, US-B2-7688828, US7688828 B2, US7688828B2InventorsJohn T. Chapman, Daniel W. Crocker, Alon S. Bernstein, Michael J. Healy, David B. FoxOriginal AssigneeCisco Technology, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (115), Non-Patent Citations (60), Referenced by (6), Classifications (25), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetDownstream remote physical interface for modular cable modem termination systemUS 7688828 B2Abstract A modular Cable Modem Termination System (CMTS) includes a packet shelf operating a Data Over Cable Service Interface Specifications (DOCSIS) Media Access Control (MAC) framer. One or more downstream Physical Interface (PHY) shelves receive DOCSIS data from the packet shelf over a packet switched network and modulate the DOCSIS data for sending on a downstream path of a cable plant. One or more upstream PHY shelves send DOCSIS data received from an upstream path of the cable plant over the packet switched network to the packet shelf. By separating the PHY components from the MAC and from the system software, the PHY components for a Hybrid Fiber Coax (HFC) plant may be replaced with different PHY components for other access technologies such as wireless, Digital Subscriber Lines (DSL), Ethernet-to-the-Home, Fiber-to-the-Home, or fiber Passive Optical Networks (PONs).
CROSS REFERENCE TO RELATED APPLICATIONS This application is a continuation-in-part of U.S. patent application Ser. No. 09/894,958, filed Jun. 27, 2001 now U.S. Pat. No. 7,209,442. The present application also claims priority of U.S. provisional patent application No. 60/574,506, filed May 25, 2004, and U.S. provisional patent application No. 60/574,876, filed May 26, 2004, and U.S. provisional patent application No. 60/622,312, filed Oct. 25, 2004, and U.S. provisional patent application No. 60/624,490, filed Nov. 1, 2004, and U.S. provisional patent application No. 60/635,995, filed Dec. 13, 2004, and U.S. provisional patent application No. 60/588,635, filed Jul. 16, 2004, U.S. provisional patent application No. 60/582,732, filed Jun. 22, 2004, and U.S. provisional patent application No. 60/590,509, filed Jul. 23, 2004.
Timing Referring back to FIG. 9A, with the separation of the PHY shelves 30 and 32 from the MAC 22, there is the potential penalty of increased delay from when a REQ 136 is issued by the cable modem 36, and when the cable modem 36 eventually receives the GNT message 137. In this example, the REQ message 136 can represent either a DOCSIS request Information Element (IE) that is successfully sent through a contention request slot, or a piggyback request. The GNT 137 is used for the explicit scheduling of an upstream packet and is typically sent in the DOCSIS MAP message as shown in FIG. 9B.
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AND OTHERS;US-ASSIGNMENT DATABASE UPDATED:20100330;REEL/FRAME:16455/27RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google