Network device with embedded timing synchronization

Details Network device with embedded timing synchronization Network device with embedded timing synchronization

2005-03-15

2005-03-15

Ho, Duc (Department: 2665)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

C370S401000, C709S248000, C713S400000, C327S175000

Reexamination Certificate

active

06868092

ABSTRACT:
The present invention provides a network device including a central timing subsystem for distributing one or more timing reference signals including a main timing signal and an embedded timing signal. Embedding one timing signal within another reduces the routing resources necessary to route the timing signal(s) within the network device. In addition, one central timing system, as opposed to two or more, may be used to provide multiple different synchronous clock signals. In one embodiment, the main timing signal is used for network data transfer while the embedded signal is used at least for processor synchronization. Consequently, a separate central timing subsystem is not required for generation and distribution of processor timing reference signals, and separate routing resources are not required for the processor timing reference signals. In addition, separate local timing subsystems for both the central timing and processor timing are not necessary. Embedding the processor timing reference signal within a highly accurate, redundant external timing reference signal also provides a highly accurate and redundant processor timing reference signal, and having a common local timing subsystem is more efficient resulting in less design time, less debug time, less risk, design re-use and simulation re-use.

REFERENCES:
patent: 4750136 (1988-06-01), Arpin et al.
patent: 4942540 (1990-07-01), Black et al.
patent: 5515403 (1996-05-01), Sloan et al.
patent: 5638410 (1997-06-01), Kuddes
patent: 5726607 (1998-03-01), Brede et al.
patent: 5812832 (1998-09-01), Horne et al.
patent: 5850399 (1998-12-01), Ganmukhi et al.
patent: 5901136 (1999-05-01), Lovelace et al.
patent: 5903564 (1999-05-01), Ganmukhi et al.
patent: 5905730 (1999-05-01), Yang et al.
patent: 5926463 (1999-07-01), Ahearn et al.
patent: 5953314 (1999-09-01), Ganmukhi et al.
patent: 5991163 (1999-11-01), Marconi et al.
patent: 5991297 (1999-11-01), Palnati et al.
patent: 5995511 (1999-11-01), Zhou et al.
patent: 6008805 (1999-12-01), Land et al.
patent: 6008995 (1999-12-01), Pusateri et al.
patent: 6015300 (2000-01-01), Schmidt, Jr. et al.
patent: 6021116 (2000-02-01), Chiussi et al.
patent: 6021263 (2000-02-01), Kujoory et al.
patent: 6033259 (2000-03-01), Daoud
patent: 6041307 (2000-03-01), Ahuja et al.
patent: 6044540 (2000-04-01), Fontana
patent: 6078595 (2000-06-01), Jones et al.
patent: 9826611 (1998-06-01), None
patent: 9905826 (1999-02-01), None
patent: 9911095 (1999-03-01), None
patent: 9914876 (1999-03-01), None
patent: 9927688 (1999-06-01), None
patent: 9930530 (1999-06-01), None
patent: 9935577 (1999-07-01), None
Black, D., “Building Switched Networks,” pp. 85-267.
Black, D.,“Managing Switched Local Area Networks A Practical Guide” pp. 324-329.
“Configuration,” Cisco Systems Inc. webpage, pp. 1-32 (Sep. 20, 1999).
Leroux, P., “The New Business Imperative: Achieving Shorter Development Cycles while Improving Product Quality,” QNX Software Systems Ltd. webpage, (1999).
NavisXtend Accounting Server, Ascend Communications, Inc. product information (1997).
NavisXtend Fault Server, Ascend Communications, Inc. product information (1997).
NavisXtend Provisioning Server, Ascend Communications, Inc. product information (1997).
Network Health LAN/WAN Report Guide, pp. 1-23.
“Optimizing Routing Software for Reliable Internet Growth,” JUNOS product literature (1998).
PMC-Sierra, Inc. website (Mar. 24, 2000).
Raddalgoda, M., “Failure-proof Telecommunications Products: Changing Expectations About Networking Reliability with Microkernel RTOS Technology,” QNX Software Systems Ltd. webpage, (1999).
“Real-time Embedded Database Fault Tolerance on Two Single-board Computers,” Polyhedra, Inc. product literature.
“Start Here: Basics and Installation of Microsoft Windows NT Workstation,” product literature (1998).
Syndesis Limited product literature, 1999.
“Using Polyhedra for a Wireless Roaming Call Management System,” Polyhedra, Inc., (prior to May 20, 2000).
Veritas Software Corporation webpage, 2000.

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