Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2006-09-05
2006-09-05
Sam, Phirin (Department: 2616)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C370S516000
Reexamination Certificate
active
07103072
ABSTRACT:
A local time of a broadband loop carrier terminal is synchronized to a network time received from a source external to the broadband loop carrier terminal by comparing the local time to the network time to generate an error offset, and adjusting the local time based on the error offset. The network time may be received in response to a Network Time Protocol (NTP) poll transmitted by the broadband loop carrier terminal. In some cases, the poll is transmitted over a communication medium using an asynchronous packet protocol, such as Ethernet or TCP/IP. In one embodiment, the local time is based on the output of a local oscillator (e.g., a voltage controlled oscillator), the frequency of which may be adjusted using control logic which uses a filtered version of the error offset along with a factory calibration and/or temperature compensation to produce a control voltage to control the oscillator frequency.
REFERENCES:
patent: 6167048 (2000-12-01), Law et al.
patent: 6175872 (2001-01-01), Neumann et al.
patent: 6393126 (2002-05-01), van der Kaay et al.
patent: 6801951 (2004-10-01), Roden, III
patent: 6804318 (2004-10-01), Alloin et al.
patent: 6826590 (2004-11-01), Glanzer et al.
patent: 6952399 (2005-10-01), Bayerl et al.
patent: 6975655 (2005-12-01), Fischer et al.
patent: 6993101 (2006-01-01), Trachewsky et al.
patent: 7000031 (2006-02-01), Fischer et al.
patent: 2002/0039370 (2002-04-01), Elliot
patent: 2002/0186716 (2002-12-01), Eidson
patent: 2003/0177154 (2003-09-01), Vrancic
patent: 2003/0228005 (2003-12-01), Melick et al.
patent: 2004/0001516 (2004-01-01), Friedrichs et al.
patent: 2004/0062278 (2004-04-01), Hadzic et al.
patent: 2004/0156325 (2004-08-01), Perkins et al.
David L. Mills, “Internet Time Synchronization: the Network Time Protocol,” IEEE Trans. Communications 39, 10 pp. 1482-1493 (Oct. 1991).
“Part 3: Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications, Section One: This section includes Clauses 1 through 21 and Annexes A through H,” IEEE Std. 802.3-2002, pp. l-vii, 1-552 (Mar. 8, 2002).
“Part 3: Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications, Section Two: This section includes Clauses 21 through 33 and Annexes 22A through 32A,” IEEE Std. 802.3-2002, pp. 1-582 (Mar. 8, 2002).
“Part 3: Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications, Section Three: This section includes Clauses 34 through 43 and Annexes 36A through 43C,” IEEE Std. 802.3-2002, pp. 1-379 (Mar. 8, 2002).
D. Mills, “Simple Network Time Protocol (SNTP) Version 4 for IPv4, IPv6, and OSI,” Network Working Group, Request for Comments: 2030 (Oct. 1996).
David L. Mills, “Network Time Protocol (Version 3) Specification, Implementation and Analysis,” Network Working Group, Request for Comments: 1305 (Mar. 1992).
Prewarski Marcus
Rumer Mark
Sloan William
Blakely , Sokoloff, Taylor & Zafman LLP
Occam Networks
Sam Phirin
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