Method and apparatus for indicating congestion in a source routed network

a source routed network and congestion detection technology, applied in the field of networkwork, can solve the problems of high level of line noise, lack of available bandwidth, and inability to support the available network bandwidth at that time, and achieve the effect of achieving the full bandwidth potential of the path
US20120147752A1Inactive Publication Date: 2012-06-14RPX CLEARINGHOUSE
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
RPX CLEARINGHOUSE
Publication Date
2012-06-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

A packet header in a source routed network is augmented to include, with each hop identifier, at least one bit for indicating congestion at the particular hop. As the packet traverses from the source to the destination, when congestion is detected at a hop, a congestion bit associated with the hop is set in the header. At the destination, when another packet is forwarded from the destination to the source on the same path, the congestion bits are reflected back to the source. When the source receives the congestion bits, it has the option of re-routing subsequent communications between the source and destination nodes by generating a new hop list, which routes around one or more of the congested hops.
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Description

RELATED APPLICATIONS

[0001] This application is a continuation of co-pending U.S. patent application Ser. No. 10 / 827,181, entitled “Method and Apparatus for Indicating Congestion in a Source Routed Network,” which was filed on Apr. 19, 2004, and which is hereby incorporated herein by reference in its entirety.FIELD OF THE INVENTION

[0002] This invention relates generally to the field of networking and more specifically to a method and apparatus for congestion detection and management in a source routed network.BACKGROUND OF THE INVENTION

[0003] In a network communications system, generally a packet forwarded from a source node traverses numerous intermediate nodes before the desired destination node is reached. Along the way, the packet may be delayed by congestion at various ones of the intermediate nodes. Various mechanisms exist for signaling the source node that the packet is being delayed on its path to the destination. For example, in a frame relay network, FECN (forward explicit co...

Claims

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