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Extended Upstream – A pragmatic approach

Every decibel counts for operators to offer high upstream capacity and stay competitive. While existing cable networks may work without the upstream ALSC, the gradual move toward high-split and ultra-high-split networks urges cable network operators to reconsider traditional approaches.

The cable industry relies on Data Over Cable Service Interface Specification (DOCSIS) 4.0 technology to
serve the needs of future applications requiring multi-gigabit symmetric services over Hybrid Fiber-Coax
(HFC) networks. The capacity increase of downstream due to extended frequencies has been studied both in theory and practice. However, the increase of upstream capacity on the grounds of higher split
frequencies has been analyzed theoretically, but practical considerations are conspicuously absent.

In their new article, Steve Condra, Kari Mäki, Niko Suo-Heikki and Arttu Purmonen take a pragmatic approach to the increase of upstream capacity in cable networks to correct the deficiency and share findings of their research. You can read the article on December 2021 issue of SCTE Technical Journal published by SCTE®, a subsidiary of CableLabs® (starting on page 86).