Solving The Mysteries of the Distributed Access Architecture (2021)

By Matthew Stehman, Ramya Narayanaswamy, Jude Ferreira & Robert Gaydos, Comcast

As the benefits of a distributed access architecture (DAA) continue to be seen from real world applications, Comcast is continuing to convert its analog cable modem termination systems (CMTSs) to virtualized CMTSs (vCMTS). The new technology of DAA not only allows for increased performance of the network with the switch to all-digital components, but also increased visibility with more sophisticated real-time telemetry. The DAA framework emits high fidelity telemetry data from many components, from the primary headend to the customer premises equipment (CPE). The scale of our DAA footprint is growing rapidly, and it is no longer feasible for humans to monitor all of the raw telemetry data and identify patterns of interest and issues. This paper introduces a computational framework and analysis methodology for automated monitoring and alerting for events of interest.

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