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Over the previous 12 to 18 months, the Cable trade has been put to the take a look at, and are available out shining. As hundreds of thousands of individuals tailored to working and studying from residence, cable networks held up and enabled the unprecedented transition. However the transition was not with out its challenges. As extra prospects consumed bandwidth all through the day, MSOs have been confronted with congestion upstream. Nobody likes to have their video freeze up throughout an necessary video name, so operators labored tirelessly to separate nodes and thus add extra upstream capability with conventional, low-split (42 MHz) merchandise. The chart beneath illustrates simply how a lot bandwidth development was skilled, notably within the upstream, over a 17-month interval.
Now that issues are stabilizing, MSOs wish to the long run. So, what’s subsequent? The place are the bottlenecks, and what community capabilities are wanted to maintain subscribers from churning? That could be a set of difficult questions! Operators have been telling us that attending to 1Gbs upstream speeds is the subsequent precedence, matched with a 1 or 2Gbs downstream, however the right way to get there’s a matter of debate. The market is fractured greater than ever in its architectural path. Can we merely prolong the present built-in CCAP (iCCAP) to a 204 MHz cut up? Transfer to Distributed Entry Structure (DAA) and Distant PHY (RPHY)? Look forward to Versatile MAC Structure (FMA)? When will DOCSIS 4.0 be able to deploy, and in what taste, Full-duplex DOCSIS (FDX) or Prolonged Spectrum DOCSIS (ESD)? Cisco’s personal John Chapman identified the problem completely in an interview with Fierce Telecom Cisco exec says too many DOCSIS choices are clouding cable’s future.
Whereas the long-range future on which path to take stays cloudy, the options essential to get to 1Gbs symmetrical providers can be found in the present day. By planning for a mid (85 MHz) or excessive (204 MHz) cut up, and deploying D3.1 OFDMA, operators can understand the promise of symmetrical speeds within the vary of 300Mbs to 1Gbs. Determine 1 beneath exhibits the entire combination capability for 85 MHz whereas Determine 2 exhibits the entire combination capability for a 204 MHz deployment.
Whereas implementing a cut up change within the community has apparent bandwidth positive factors, it does include its personal set of challenges. I just lately participated in a webinar with trade consultants Jason Miller and John Downey the place they lined the problems, issues, and finest practices for deploying these options in higher element. You will discover a hyperlink to the Webex on-demand replay on the Cisco Information Community right here. I believe one can find it to be extraordinarily useful in case you are contemplating a mid or excessive cut up implementation within the close to future. Symmetrical and multi-gigabit speeds could also be coming to your house quickly!
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