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Reverse Notification Tree For Data Networks

a data network and reverse notification technology, applied in the field of data networks, can solve the problems of inability to recover from a network failure in a timely manner, the amount of time required to recover from a link or switch the time required to recover from a network failure can take several seconds to several minutes, so as to minimize the loss of data, reduce the recovery time of network faults, and minimize the effect of data loss

Inactive Publication Date: 2014-02-13
TELLABS OPERATIONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach significantly reduces fault recovery time in MPLS networks by enabling prompt rerouting of data through an alternate path, minimizing data loss and enhancing network reliability by utilizing a reverse notification tree to swiftly indicate and respond to failures.

Problems solved by technology

A problem with any data network, including an MPLS network, is the amount of time required to recover from either a link failure or a switch failure.
Empirical data shows that the time required to recover from a network failure can take several seconds to several minutes, an unacceptably long time.

Method used

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  • Reverse Notification Tree For Data Networks
  • Reverse Notification Tree For Data Networks
  • Reverse Notification Tree For Data Networks

Examples

Experimental program
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Embodiment Construction

[0014]FIG. 1 shows a simplified block diagram of a packetized-data switching network 100. Each of the squares shown in FIG. 1 including boxes represented by reference numerals 102, 104, 106, 108, 110, 112, 114, 116, 118 and 120 represent one or more types of asynchronous switching systems that asynchronously receive data in e.g., packets, cells or frames from an “upstream” switch and route, direct, couple or otherwise send the data onward to another “downstream” switch logically closer to the ultimate destination for the data. By way of example, these switching systems might be internet protocol (IP) routers, asynchronous transfer mode (ATM) switches, frame relays switches or other types of packetized-data switching systems implemented to receive packetized data over a transmission line and reroute the data onto one or more output ports to which are connected transmission media coupled to other switching systems.

[0015]In FIG. 1, switching system number 1, (identified by reference nu...

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Abstract

Recovery time upon the failure of a link or switching system in an asynchronous data network can be minimized if downstream data switches provide upstream messages indicating to an upstream switching system that the downstream traffic arrived intact and was properly handled. Upon this loss or failure of the upstream status message to an upstream switching system, an upstream switching system can reroute data traffic around a failed link or failed switch with a minimal amount of lost data. The upstream status message is conveyed from a downstream switching system to an upstream switching system via a reverse notification tree data pathway.

Description

RELATED APPLICATIONS[0001]This application is a continuation application of U.S. application Ser. No. 12 / 968,985, filed Dec. 15, 2010, which is a continuation application of U.S. application Ser. No. 11 / 838,328, filed Aug. 14, 2007, which is a continuation application of U.S. application Ser. No. 09 / 693,276, filed Oct. 20, 2000, which claimed priority to U.S. Provisional Application No. 60 / 160,840, filed Oct. 21, 1999; U.S. Provisional Application No. 60 / 161,277, filed Oct. 25, 1999; and U.S. Provisional Application No. 60 / 187,798, filed Mar. 8, 2000. These prior applications, including the entire written description, claims, and drawing figures, are hereby incorporated into the present application by reference.TECHNICAL FIELD[0002]This invention relates to data networks. In particular this invention relates to a method and apparatus for providing a pathway through a multi-protocol label-switching (MPLS) network over which messages, which act to trigger the re-routing of data onto a...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04L12/703H04L12/723H04L45/28H04L45/50
CPCH04L45/50H04L45/28H04J3/14H04L43/0817H04L45/22H04L45/48H04L49/552H04L2012/5627H04L45/00
Inventor OWENS, KENNETH R.MAKAM, SRINIVAS V.HUANG, CHANGCHENGSHARMA, VISHAL
Owner TELLABS OPERATIONS
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