Frame relay switched data service

• US 6,081,524 A
• Filed: 12/10/1997
• Issued: 06/27/2000
• Est. Priority Date: 07/03/1997
• Status: Expired due to Term

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Corporation (AT&T, Inc.)
• Inventors: Medamana, John Babu, Saksena, Vikram R., Holmgren, Stephen L., Chase, Christopher J.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): HOM, SHICK C
• Application Number:
  US08/988,159
• Time in Patent Office: 930 Days
• Field of Search: 370/337, 370/344, 370/347, 370/349, 370/389, 370/395, 370/412, 370/388, 370/392, 370/397, 370/401, 395/200.79, 395/200.8
• US Class Current: 370/389
• CPC Class Codes: H04L 12/2854 Wide area networks, e.g. public data networks
• CPC Class Codes: H04L 12/4608 LAN interconnection over ATM networks
• CPC Class Codes: H04L 2012/5645 Connectionless
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 45/10 Routing in connection-oriented networks, e.g. X.25 or ATM
• CPC Class Codes: H04L 45/72 Routing based on the source address
• CPC Class Codes: H04L 45/741 Routing in networks with a plurality of addressing schemes, e.g. with both IPv4 and IPv6
• CPC Class Codes: H04L 49/105 ATM switching elements
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections

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.

Claims

1. A method comprising the steps of:

receiving into a fast packet network frame relay data packets, said frame relay data packets having user data in a user data field;

switching said frame relay data packets within the fast packet network responsive to the user data, wherein the user data includes an internet protocol packet;

generating a fast packet address field responsive to internet protocol packet data; and

routing the internet protocol packet through the fast packet network responsive to the fast packet address field.

2. The method of claim 1 wherein the step of generating the fast packet address field occurs in a node located at an edge of the fast packet network.

3. The method of claim 1 wherein the step of generating the fast packet address field includes routing the internet protocol packet data within the fast packet network to a node capable of generating the fast packet address field responsive to the internet protocol packet data.

4. The method of claim 1 wherein the fast packet address is generated at a single node within the fast packet network.

5. The method of claim 1 wherein the fast packet network includes a plurality of nodes capable of generating the fast packet address field responsive to the internet protocol packet data and nodes not capable of generating the fast packet address field responsive to the internet protocol packet data.

6. The method of claim 1 wherein layer 3 data within the internet protocol packet data is utilized to generate the fast packet address field.

7. The method of claim 1 wherein layer 4 data within the internet protocol packet data is utilized to generate the fast packet address field.

8. The method of claim 7 wherein the layer 4 information is utilized to determine a quality of service.

9. The method of claim 8 wherein the quality of service includes an information rate.

10. The method of claim 8 wherein the quality of service includes priority information.