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Method and system for reducing congestion in connection-oriented packet networks having digital subscriber line access
| Details |
Inventors: Wetzel, Gregory F.;
Assignee: Covad Communications Company (Santa Clara, CA)
Primary Examiner: Yao; Kwang Bin
Assistant Examiner: Harper; Kevin C.
Attorney, Agent or Firm: Kuo; Jung-hua
A method and system for provisioning remote user data access over digital subscriber lines (DSL's) through connection-oriented packet networks is described. According to a preferred embodiment, DSL terminal units are directed to train at a rate that is not substantially greater than the subscribed data rate, thereby avoiding network congestion due to data rate mismatches between the DSL connection and a corresponding permanent virtual circuit (PVC) channel through the connection-oriented packet network. According to another preferred embodiment, the DSL units are directed to test for the maximum trainable data rate before settling to the subscribed data rate, and to communicate this information to a network operations center computer, thereby allowing the maximum allowable DSL data rate to be compared to actual client traffic usage patterns and to the client's subscribed data rate. According to another preferred embodiment, in the event that the maximum trainable rate lies substantially below the subscribed data rate, the network operations center automatically re-provisions the permanent virtual circuit (PVC) channel through the connection-oriented packet network to a corresponding lower level, thereby conserving network resources. |
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DETAILED DESCRIPTION In accordance with a preferred embodiment, a method and system for provisioning remote user data access over DSL through connection-oriented packet networks is provided, wherein the DSL terminal units associated with the DSL link are directed to train at a rate that is not substantially greater than a subscribed data rate.
In this manner, network congestion due to data rate mismatches between the DSL connection and the corresponding PVC channel through the connection-oriented packet network is minimized or avoided.
According to another preferred embodiment, a provisioning process is provided wherein the DSL terminal units are directed to test for the maximum trainable data rate before settling to a trained data rate not substantially greater than the subscribed data rate, and to communicate the maximum trainable data rate to a network operations center computer.
In this manner, the maximum allowable DSL data rate to each specific client premise is known by the network operations center, and can advantageously be used by the end-to-end service provider.
For example, the maximum allowable DSL data rate may be compared to the client's subscribed data rate and to the client's actual traffic usage patterns, permitting enhanced services to be offered to the client by marketing personnel when appropriate.
As another example, knowledge of the maximum allowable DSL data rates for a plurality of client premises may be used for facility routing and community data planning applications, and may be sold to digital content providers as valuable marketing data.
According to another preferred embodiment, in the event that the maximum trainable rate between DSL terminal units lies substantially below the subscribed data rate, the network operations center causes the automatic re-provisioning of the permanent virtual circuit (PVC) channel through the connection-oriented packet network such that the resulting PVC has a corresponding data rate lower than the subscribed data rate.
In this manner, bandwidth that would otherwise go unused is released for allocation to other ATM channels, thereby conserving network resources and enhancing network efficiency
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Databases 
