When Does the DOCSIS 3.1 TaFD Feature Increase the Capacity of My Network? (2017)

By Ayham Al-Banna, Ph.D. & Tom Cloonan, Ph.D., ARRIS

The traffic engineering benefits of the TaFD feature of OFDMA channels are evaluated for different network scenarios based on real-world assumptions & measurements from a network operator. MSOs are looking at this feature as a potential savior for symmetrical service offering. It will be shown that deploying the TaFD feature may or may not benefit the overall capacities of HFC networks depending on the network assumptions and conditions. The specific conditions will need to be studied and analyzed to decide whether TaFD adds value or not. Migration alternatives are proposed for cases where asymmetrical service offering is desired but TaFD may not help.

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