The bandwidth requirements of UltraHD Television is much higher than typical HDTV. In fact, it is 4 times more than services today and will be 16 times higher when we move to 8K TV later in the decade. This will have a big impact on what broadband access technology will meet the consumer’s needs
According to Netflix, they are recommending at least 25Mbps of bandwidth to ensure 4K quality signal. However, that is 25Mbps of available services. If a consumer is running other traffic at the same time (such as IPTV services), much of that capacity may already be in use.
In addition, many telephone companies that wish to provide their own 4K services may require “headroom” of another 25Mbps to ensure they will deliver the signal without any disruption. That means 50Mbps per stream – or 200Mbps for 4 concurrent streams. Today’s VDSL technology will not support such traffic requirements.
When the industry moves to 8K UltraHD later in the decade, the requirements will grow even more substantially. Four streams of 8K UHD will require around 680Mbps (170Mbps per stream after headroom is added)
So, how can this problem be solved?
That’s where G.fast comes in.
With fiber optics to the home – there are a lot of costs and complexities to reach all the way to the residence. That is why so few consumers worldwide have FTTH.
That’s why the ITU (which also created DSL) came together to solve this problem. They created G.fast, the latest approved standard from the ITU. This new standard was ratified in December 2014 with the goal of delivering up to 1Gbps of broadband access to single family homes and apartment building residences. This new technology uses existing copper wiring to keep the costs down, lower the hassles of installation and speed up the deployment of ultra high speed broadband at an affordable price.
The way it works is fiber is brought closer to the residence to a box called the distribution point (typically very close to the home). Inside this box, the fiber is terminated and the data is transferred onto the telephone wiring that comes into the consumer’s residence. Each subscriber will have the ability to achieve up to 1Gbps of speed. Also, G.fast will allow telephone companies to provide a better ratio of upload and download speeds – making it much easier to upload videos, share photo libraries, use cloud backup services and much more.
Bandwidth Requirements for Delivering UltraHD TV
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FOR ULTRAHD TV
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OF ULTRA HD TV
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ARE 4X HDTV
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TELCOS WILL NEED MORE
• Service guarantees (SLA)
will require additional
capacity needed to ensure
reliable TV service
• Often 2x bandwidth
needed per stream
Needed per stream
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Minimum Bandwidth Requirement
for 8K quality results
*Japan is piloting 8K UltraHD in 2016
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So what can we do?
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THE ANSWER IS G.FAST
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Problem of the Subscriber Drop
•Trenching on premises
•Installation scheduling & cost
•Right of way issues
•Roll-out delays due to capacity of installers
•Very expensive overall
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Basics of G.fast
• New ultra broadband standard by ITU and Broadband
Forum (fully ratified)
• Delivers up to 1Gbps over existing telephone wires
• Brings fiber close to the home and copper wiring for the
final 400 meters or closer
• Much lower cost versus FTTH and faster roll-out
• Services will roll out in 2015
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Less than 140Mbps
G.fast Distribution Point
Up to 1Gbps
Fiber to the Home
Over 1 Kilometer