Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2007-08-14
2007-08-14
Rao, Seema S. (Department: 2616)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S395500, C370S295000, C370S465000
Reexamination Certificate
active
10375256
ABSTRACT:
A new type of data transport service which uses a frame relay layer 2 data link connection identifier (DLCI) to select among various service types, feature sets, and/or closed user groups (CUGs). A layer 3 address may be extracted from a layer 2 frame, and the layer 3 address information may be used to route a data packet over a packet-switched network according to the service classes, feature sets, and/or CUGs selected. At the destination, the layer 3 data packet may again be enclosed in a layer 2 frame with a DLCI indicating the service classes, features sets, and/or CUGs. Because the use of conventional permanent virtual circuits (PVCs) is not required in aspects of the invention, new methods of measuring and managing network traffic are presented.
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Chase Christopher J.
Holmgren Stephen L.
Medamana John Babu
Saksena Vikram R.
AT&T Corp.
Hom Shick
Rao Seema S.
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