Interworking circuit emulation service over packet and...

Multiplex communications – Communication techniques for information carried in plural... – Adaptive

Reexamination Certificate

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Details

C370S389000, C370S392000, C370S474000, C370S352000, C455S238100

Reexamination Certificate

active

07974308

ABSTRACT:
A system and method are provided for implementing CESOP inexpensively yet effectively implemented across an MPLS or an IP network. A Zarlink chip provides CESOP functionality, providing a TDM pseudowire by converting TDM streams into Ethernet packets. These Ethernet packets can be processed by a Marvell chip, which has the ability to perform QoS functions on the packets. The Marvell chip converts the Ethernet packets into MPLS or IP packets for transmission over a packet network. Use of a single virtual circuit label, invisible to the packet network for routing purposes, within the Ethernet packet allows Marvell chips at each end of the emulated circuit to tie traffic to a particular customer and to thereby apply appropriate QoS constraints.

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patent: WO 2003/003667 (2003-01-01), None
patent: WO 2005/055548 (2005-06-01), None
Malis et al., SONET/SDH Circuit Emulation Service Over MPLS (CEM) Encapsulation, Apr. 2001, Internet Engineering Task Force, pp. 1-5.
Martini et al., Encapsulation Methods for Transport of Layer 2 Frames Over MPLS, Feb. 2001, Internet Engineering Task Force, pp. 1-13.
Martini et al., Transport of Layer 2 Frames Over MPLS, Feb. 2001, Internet Engineering Task Force, pp. 1-10.
Delivery of Broadcast TV over a VPLS-Based Multicast Solution, Dec. 2, 2004, Internet Citation (Online) Alcatel, XP001237249.

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