Preemptive transmission protection scheme for data services...

Multiplex communications – Fault recovery – Bypass an inoperative switch or inoperative element of a...

Reexamination Certificate

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C370S235000, C370S395200

Reexamination Certificate

active

07668081

ABSTRACT:
A method, protection overlay and system in which different service streams are distributed via a plurality of links, comprising logically separating the service streams according to service type profile; allocating resources for working and backup capacity according to the service type profile; and defining a link aggregation group (LAG) including at least one worker link for carrying high priority service streams and at least one backup link for carrying low priority service streams; whereby in response to worker link failure, at least higher priority service streams are transitioned from a failed worker link to a backup link.

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Search Report in corresponding EP 06255780.6-2416, Apr. 3, 2007.
Ziying Chen: “The LSP Protection/Restoration Mechanism in GMPLS” Internet Citation [Online] Oct. 1, 2002, XP002239552 Retrieved from the Internet: URL:http://beethoven.site.uottawa.ca/dsrg/PublicDocuments/REPORTS-THESES/MasterProject-ZiyingChen-2002.pdf> [retrieved on Apr. 28, 2003].
*paragraph [2.1.LSP.Hierarchy]; figure 1.3* *paragraph [2.3.Traffic.Engineering]* *paragraph [2.4.2.Enhancements.in.the.Routing.Protocol.]* *paragraph [5.The.Recovery.Mechanism.in.GMPLS]*.
Imajuku Y Tsukishima NTT Y H Kim Etri W: “GMPLS extension requirements for virtual concatenation and link aggregation control” IETF Standard-Working-Draft, Internet Engineering Task Force, IETF, CH, Jun. 11, 2005, XP015040619 ISSN: 0000-0004 *paragraph [1.Introduction]*.
Lai W Et Al: “RFC3386: Network Hierarchy and multilayer survivability” Internet Citation, [Online] Nov. 7, 2002, XP002239553 Retrieved from the Internet: URL:www.ietf.org/rfc/rfc3386.txt?number=33 86> [retrieved on Apr. 28, 2003]. * paragraph [2.3.Survivability.Mechanisms.Comparison] *.
IEEE Std. 802.3-2005; Information Technology—Telecommunications and Information Exchange Between Systems—Local and Metropolitan Area Networks—Specific Requirements; Part 3: Carrier Sense Multiple Access With Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications; pp. 1-387.

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