ATM Access Device Auto Configuration via Discovery Packets
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Solution Overview
Problem
Conventional asynchronous transfer mode access devices require complex configuration for packet encapsulation, Virtual Path Identifier, and Virtual Channel Identifier settings, necessitating changes in both the device and central office, which increases manufacturing and customer service costs and hinders market acceptance.
Innovation Solution
A method that automatically configures asynchronous transfer mode access devices by generating discovery packets with various headers, transmitting them to a central office, and establishing valid virtual path and channel identifier pairs and encapsulation values, eliminating the need for end-user configuration and central office changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual configuration is performed at the factory or customer site, then the access device can be properly configured for packet encapsulation and identifiers, but manufacturing costs and customer service costs increase
Solution Approach 1:
The access device automatically configures itself by generating discovery packets and processing responses from the central office to obtain encapsulation and identifier values, eliminating the need for manual factory or on-site configuration and thereby reducing manufacturing and service costs while maintaining configuration accuracy
2Loss of time
If automatic configuration methods are implemented, then configuration time is reduced, but changes are required in both the central office and access devices
Solution Approach 1:
The configuration process is segmented into distinct phases: generating discovery packets with different header types, transmitting them to the central office, receiving responses, and extracting configuration values. This segmentation allows automatic configuration without requiring complex changes to the central office system, as each phase can be independently implemented in the access device
3Adaptability or versatility
If multiple discovery packets with different headers are generated and transmitted, then the correct encapsulation and identifier values are found, but the configuration process becomes more complex
Solution Approach 1:
The access device transmits discovery packets with different header types (logical link control header and virtual channel multiplexed header) and processes the responses from the central office to determine which encapsulation method and identifier values are correct. This feedback mechanism enables the device to automatically adapt to the required configuration without manual intervention, achieving high adaptability while managing complexity through systematic trial and validation
Data Source
AI summary
A method for obtaining virtual path identifier, virtual channel identifier, and encapsulation values in an asynchronous transfer mode access device for a network using either non-static or static internet protocol address assignments and asynchronous transfer mode adaptation layer 5. In the non-static environment, a plurality of discovery packets are generated, but in the static environment, a plurality of address resolution protocol packets are generated. Headers are added to the plurality of packets, such that a first set of packets, each packet including a logical link control header, and a second set of packets, each packet including a virtual channel multiplexed header, are realized. The first and second sets of packets are encapsulated and then transmitted to a central office. It is determined if a valid response packet has been received to any of the transmitted packets, and a virtual path identifier/virtual channel identifier pair value and encapsulation value are established, based upon a virtual path identifier/virtual channel identifier pair value and encapsulation value of the received valid response. The established virtual path identifier/virtual channel identifier pair value and encapsulation value are utilized for transferring data between the asynchronous transfer mode access device and a central office.