2016

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Cable: The FTTH Awakens

Session Number: 201
Track: New & Emerging Technology
Session Type: Panel Session
Moderator: Kevin Lee Bourg [Optical Network Architect - Corning Optical Communications]
Primary Presenter: Jon Schnoor [Senior Engineer - Network Technologies - CableLabs]
Co-Presenter 1: Venk Mutalik, Mr. [Vice President, Technology and Strategy - ARRIS Group Inc. ]
Co-Presenter 2: Steve Burroughs [Lead Architect - CableLabs]
Co-Presenter 4: Paul Runcy [Vice President of Sales - Network Products Division, Sumitomo Electric Lightwave]
Time: Jun 14, 2016 (01:45 PM - 03:00 PM)

Audience Industry Segment: Service Provider, Engineering, Equipment Vendor, Manufacturer, Media, Network Operator, Other, Outside Plant

Session Description:  This session will have three presentations from:

1.Cable FTTH: Moving Beyond DOCSIS Provisioning- Steve Burroughs
FTTH deployment costs are far more than the initial trenching and installation. Maintenance, monitoring, problem diagnostics/resolution, back-office applications and technical staff are all impacted by new fiber-based access network technologies (e.g., EPON and GPON).
A significant challenge for FTTH deployments is Operations Support Systems, especially for interface and device provisioning mechanisms that are historically access network dependent. For example, in the cable industry, device and service provisioning is provided through the use of DOCSIS and device-dependent TLVs passed to the cable modem during startup. DOCSIS Provisioning of EPON (i.e., DPoE), leverages existing OSS by virtualizing ONUs in the 'CMTS' (i.e., DPoE System) to translate DOCSIS TLVs into extended OAM (eOAM) to provision the ONUs. Though this mechanism facilitates FTTH today, it is only the first step towards a broader, access network independent (i.e.,ANI), OSS framework that supports device and service provisioning tomorrow.

2. Fiber Parity in Cable- Jon Schnoor

Fiber to the home is a growing trend with cable operators today. In many cable markets they are deploying fiber on an as-needed basis to deliver services due to community requirements, competitive and bandwidth requirements as well as commercial necessities.

The promise and potential that fiber affords makes it an attractive technology for commercial and residential customers alike. However, for cable operators, deploying an all-fiber access network presents both challenges and opportunities in order to provide the same products and services that they currently deploy within their existing Hybrid Fiber-Coaxial networks.

The cable operators’ “triple play” bundle, consisting of voice, video, and data services, is the major product offering for subscribers. This package of products is a cornerstone for every cable operator and must be a part of their product offering today and going forward. There is a need that the services should look, feel and be the same in an all-fiber access network. Parity of services deployed on various access network technologies is a fundamental requirement for operators.

In order to achieve parity, the end-to-end protocol implementation must be ubiquitous and the back-end support systems must remain to provide a sustainable migration path with desirable economics to support the fiber access network. This paper will explore the challenges that an all-fiber access network presents as well as the opportunities that fiber provides cable operators when looking toward the future.

3. Distributed Node Architecture and More- Venk Mutalik

Relentless traffic growth in the upstream and downstream is a prime driver for fiber deep networks. In previous years we have shown that a move to an all fiber network is a journey and not an event. This is due to the limited rate of build possible per year, even if resources are available at command. Anticipating this bottleneck, MSOs have researched progressively complex schemes to increase capacity and drive fiber deeper. Thus ADI, N+0, FTLA and ultimately FTTH whether using traditional PON or Hybrid PON technology are all the ways in which fiber can be driven deeper into the network.

While each of these approaches can have specific ways of increasing capacity, they also come with their drawbacks. While some of these techniques such as ADI may not be able to convert all of the investment that it takes to implement them towards an all fiber network, a true FTTH network could take several decades to implement. Not yet available but soon to be available technologies such as Remote PHY and other distributed architectures can enable longer links and help with hub collapses.

In the above cases, driving fiber deeper is fraught with an ever increasing demand for wavelengths. Various combinations of analog and digital wavelengths in the downstream and upstream directions are ultimately then aggregated, (sometimes in the RF domain) at the headend. This results in a huge demand for sparse headend space while not really increasing bandwidth and capacity. There has to be a better way. One, where going fiber deeper does not result in micro service groups, each with its own upstream and downstream wavelengths which are then combined as they reach the headend to share a larger, more sensible service group.

In this session we investigate each of the approaches indicated above and show a new approach called “Distributed Node Architecture”. Recent technology breakthroughs in OBI free optics, enable high SNR, low Ingress architectures that are able to use just one set of wavelengths (one for US and one for DS) and create a sensible service group size, all the while enabling progressively fiber deep designs. By enabling the node functionality to be distributed across the service group, progressively deeper fiber networks can be designed, where increasing capacity needs are met in proportion to customer demands.

4. New architectures, new possibilities; moving beyond the traditional xPON footprint.- Paul Runcy

Most MSO deployments don’t fit within the ‘standard’ 20 km radius & 1:32 split ratio. New approaches to deploying xPON enable greater flexibility and a better fit with the MSOs business case and existing footprint.




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