PowerPoint Presentation

HOW DO WE MAKE G.FAST REALThe Best Practices for Deploying G.fast

Charles ChiuDirector, Business Development, Sckipio Technologies11-May-15Sckipio | How Do We Make G.fast Real #You have heard about G.fast and how it is going to be the most important broadband technology for the next decade. Now, today I want to take a few minutes to help you think about G.fast in ways that will make you more successful when deploying G.fast.15 SECRETS TO SUCCEEDING IN G.FAST DEPLOYMENTS 11-May-15Sckipio | How Do We Make G.fast Real #Sckipio is the leader in G.fast and because of that leadership, we have learned a lot of best practices that wed like to share with you. In fact, we have put together 5 secrets that will help you with your deployment of G.fast2SECRET #1: MODEL THE BUSINESS11-May-15Sckipio | How Do We Make G.fast Real #Okay. The first secret is remember the business model. The secret of G.fast is it is designed to lower the cost of deploying gigabit level broadband.3WHATS THE BIG G.FAST IDEA?Leverage your existing copper wiring to deliver ultra broadband to the masses

11-May-15Sckipio | How Do We Make G.fast Real #The big idea of G.fast is uses your existing copper wiring to deliver ultra broadband. 4PROBLEM OF SUBSCRIBER DROPTrenching on premisesInstallation scheduling & costRight of way issuesRoll-out delays due to capacity of installersVery expensive overall

Average 1.8kmAverage 500m

Average 100m

$$$

11-May-15Sckipio | How Do We Make G.fast Real #G.Fast solves a serious economic problem that fiber faces when trying to reach the last few hundred meters. 5

Central Office

VDSL2800-1,000 metersLess than 140MbpsG.fast Distribution Point30-400 metersUp to 1GbpsFiber to the HomeOver 1 KilometerOver 1Gbps

Fiber

Twisted Pair11-May-15Sckipio | How Do We Make G.fast Real #G.Fast is a goldilocks like technology. Its just right. Fiber optics offers amazing performance, but the cost to deploy FTTH is very high. VDSL is a very mature technology and useful from long distances. However, it doesnt have the performance to meet the requirements of the next generation. Thats where G.fast comes in. Its just right. Its perfect. It provides the best blend of FTTH speeds but at costs that are highly attractive. It makes the G.fast business model spectacular.6G.FAST IS VERY FAST!700Mbps100 meters500Mbps200 meters350Mbps300 meters270Mbps400 meters150Mbps500 metersNumbers are aggregate upstream/downstream16 lines with crosstalk11-May-15Sckipio | How Do We Make G.fast Real #So, how fast is G.fast? Very Fast.7G.FAST GOING FURTHER700Mbps100 meters500Mbps200 meters350Mbps300 meters270Mbps400 meters150Mbps500 metersNumbers are aggregate upstream/downstream16 lines with crosstalk11-May-15Sckipio | How Do We Make G.fast Real #In tier 1 telco trials, we have discovered, quite remarkably, that G.fast is working across much further distances than we all thought almost twice as far for a given rate. This changes the economics of G.fast substantially and make cause you to rethink about where you might place G.fast and how it might transform more of your overall infrastructure. 8NEW MORE EXPENSIVECost per portFTTHCost per portVDSL VECTORINGCost per portG.FASTG.FAST Lowest cost per port11-May-15Sckipio | How Do We Make G.fast Real #Thats the most amazing thing. Whats starting to be clear is not only is G.fast affordable it might be the most affordable. Because vectoring is built-in and the G.fast design is so efficient, we are seeing costs per port that are LESS than VDSL with Vectoring. This is very surprising and will make your business model more attractive.9SECRET #2: FOCUS ON POWER11-May-15Sckipio | How Do We Make G.fast Real #The second secret is the importance of power of energy consumption. 10IMPORTANCE OF POWERG.fast leverages reverse power

Everything driven from power budgetDistance it can goSize of unitOverall cost

11-May-15Sckipio | How Do We Make G.fast Real #Because of the potential to use G.fast in places where there isnt local power, it is critical to make sure that every possible measure has been taking to ensure as little power is required. 11Cost vs. Power ConsumptionImpact of power consumption on the equipment housing costReference: Adtran ITU-T contribution 2012-02-4A-058R1, a case study done in 2012

16with DOno DO16242411-May-15Sckipio | How Do We Make G.fast Real #For example, Adtran made a contribution to the standard where they indicated that without discontinuous operation with the ability to turn off lines that are in use the power requirement is at least double. That results in much higher costs and larger equipment. 12WHAT DRIVES POWER CHOICESDiscontinuous operation

Vectoring

Training times and low power states

G.int and network management11-May-15Sckipio | How Do We Make G.fast Real #There are several key technologies that drive power consumption. The first is vectoring. Vectoring is a power-intensive activity. The easiest and most effective way to keep the power requirements down for G.fast vectoring is to avoid using a separate vectoring engine. Whats related to the vectoring is retraining times. Let me explain, in order to save power, G.fast powers down lines that are not in use. So, there are two effects. The first effect is when you want to power those lines back up, the speed in which they power up is critical to performance. Also, when you vector, the ability to re-vector quickly with changing line conditions is key. So, training times becomes a critical item in thinking about power. The third factor is the network processor. You want to make sure you think through exactly how much backhaul you will need because the more processing you put into the network processor the bigger the impact to the overall power budget. Think wisely about this.13POWER COMPARED TO VDSLTime Division DuplexingFrequency Division DuplexingFast retraining Slow retrainingLow power defaultDefault: Always broadcasting Power down each portAll ports activeFast vector pairingSlow vector pairing

VDSL11-May-15Sckipio | How Do We Make G.fast Real #There are some folks still thinking about staying with VDSL or even thinking about V plus. There are a few key things you must remember. G.fast uses TDD this means that it only uses power when it transmits. Whereas VDSL always transmits. This will become more problematic if larger frequencies are used. The second key difference is retraining times. As I mentioned before, in order to keep power consumption down, it is helpful to power down the lines when not in use. The effectiveness of powering up/down the lines is directly correlated to the ability to quickly retrain the system. This plays a role when ensuring the highest performance via vectoring 14SECRET #3: UNDERSTANDING VECTORING11-May-15Sckipio | How Do We Make G.fast Real #The third secret we have discovered is related to vectoring in general.15CROSSTALK IS BANDWIDTH KILLER

11-May-15Sckipio | How Do We Make G.fast Real #The most important principle to understand is vectoring is mandatory. Its not optional. Anyone who tries to sell you a technology that doesnt use vectoring is doing a great disservice to you. 16G.FAST = VECTORING

11-May-15Sckipio | How Do We Make G.fast Real #One common misunderstanding is what it takes to support vectoring with G.fast. Unlike VDSL, which requires the addition of vectoring to existing VDSL set-ups, G.fast solutions come with vectoring already built in. 17DYNAMIC VECTORING IS KEYReal time

Must respond in time

Built-in vectoring critical

11-May-15Sckipio | How Do We Make G.fast Real #The secret of vectoring is to handle all the lines in real time. Since line conditions are always changing, it is important to be able to understand the conditions and respond to those conditions as they happen. So, to get the most out of vectoring, it is important that all the information reach the vectoring engine in enough time to optimize around it. 18SECRET #4: UNDERSTAND THE TRANSITION FROM VDSL11-May-15Sckipio | How Do We Make G.fast Real #The fourth secret is how you transition from VDSL to G.fast19HOW G.FAST DIFFERS FROM VDSLParameterVDSLG.FASTFrequency RangeUp to 30MHz (30a)2-106MHz, 2-212MHz (future)Max RateUp to 250Mbps (30a) and 150Mbps (17a) for short loops, real-world is 30-80Mbps1Gbps over short loops, exceeding 500 Mbps over real 100m linesModulationOFDMOFDMNumber of carriers4K (8K for future V+)2K (for 106MHz profile)Multiplexing schemeFDDTDD, synchronized among the different copper pairsSymbol time~250 sec (17MHz profile)~20 secVectoringVia G.993.5Supported, with adaptations needed for higher frequencyTx powerVaries by profile, 14.5dBm4dBmFECRS + Trellis codeRS + Trellis code11-May-15Sckipio | How Do We Make G.fast Real #There are many technical differences between G.fast and VDSL. Let me point out a few. First, G.fast is optimized for affordability at high performance. A lot of choices of the number of carriers, the symbol time, the use of TDD they all play a role in the power budget, the speed and the memory required to deliver high performance with low latency. 20HOW G.FAST DIFFERS FROM VDSLParameterVDSLG.FASTDownstream/Upstream ratioFixedConfigurable: 90:10 to 30:70Customer self-installQuestionable. i.e. rates become marginally lowYesxDSL Spectral compatibilityIssues with 17M/30M mixIssues with CAB/DP MixYes, fresh start with new frequency bandRetrain timeVery long (30-90 second range)Very short few secondsRate adaptationVery slow, 128 carriers at a time, SOS not robustVery fast, quick and robust adaptation within few msecLow power mechanismsUnder definition, expected savings up to 50%, very slow wake up timeSpecified from day one, discontinuous operation, scales with traffic rate11-May-15Sckipio | How Do We Make G.fast Real #It is important that G.fast has the flexibility and design to meet the requirements of the next 10-15 years.21CO-EXISTENCE WITH VDSLVDSL and G.fast can co-exist

Separate by frequency

VDSLG.FASTUp to 17Mhz20-106Mhz11-May-15Sckipio | How Do We Make G.fast Real #They can install the G.fast in the DPU connect the lines. They can activate G.fast ports on the same line. Do from far away. Dont send the technician can upgrade the customer without any infrastructure changes. 22VDSL & G.FAST ARE USUALLY NOT CO-LOCATEDMost operators install VDSL far from the DPWhen deploying G.FAST, legacy VDSL service will continue without interferencesThe service can be gradually upgraded to G.FAST

Average 500m

Average 100m

VDSLG.FAST20-106MHz17MHzCo-Existence

11-May-15Sckipio | How Do We Make G.fast Real #Since VDSL and G.FAST are usually not co-located, the VDSL service can continue serving customers in parallel to deployment of G.FAST in the same environment. This is why support of VDSL interoperability is not required23APPROACH MOST ARE TAKINGBring fiber to the DPU

Keep infrastructure as is (ADSL/VDSL)

Using diplexer in the DPU to merge the lines

Migrate gradually to G.fast over time without truck roll

11-May-15Sckipio | How Do We Make G.fast Real #Turn off the VDSL port and turn on the G.fast on the same wire. Keep living with the infrastructure. 24VDSL FALLBACKNot required by ITU or Broadband Forum

Most service providers wont deploy

Dont want to double pay for existing VDSL customers They already have VDSL running, no need to pay again

Cross-technology vectoring is challengingIf integrated into a single chip extremely complex and inefficient

If needed, can be implemented with two-chip solution11-May-15Sckipio | How Do We Make G.fast Real #Some companies are promoting VDSL fall-back

Yet, VDSL fallback isnt necessary. Think about it. Every consumer that wants VDSL already has it. Youve already paid to deploy the VDSL at both ends. So, when you move to G.fast, it makes no sense to pay for VDSL again for the customers that already have VDSL. And youd never deploy VDSL to a new consumer since G.fast is more reliable, easier to manage and the performance is upgradeable.

Plus, combination chips that claim to support VDSL and G.fast cannot vector on both at the same time. They have to chose one technology or the other. In practice, they will always chose the G.fast to vector since it requires vectoring to achieve reliable performance.

If you really need to have vectoring at the DPU the best way to do it is to instead a two-chip solution with vectored VDSL at the lower frequency and G.fast at the higher frequencies. Yet, I will tell you virtually all the service providers who are deeply looking at this have concluded VDSL fall back doesnt make economic sense.

25SECRET #5: FIND THE SWEET SPOT11-May-15Sckipio | How Do We Make G.fast Real #The fifth secret is to find the optimal solution to your specific infrastructure.26DEPLOYMENT OPTIONS

11-May-15Sckipio | How Do We Make G.fast Real #There are many ways to deploy G.fast in MDU, SFU, hotels, and even business services.27MDU IS KEY USE-CASE

11-May-15Sckipio | How Do We Make G.fast Real #The key use case is MDU. 28DPU IN THE BASEMENTSmaller buildingsFiber to the DPUDPU in basement1:16 today to CPE24 feasible now, 48 future

11-May-15Sckipio | How Do We Make G.fast Real #In smaller buildings, the way G.fast is deployed is fiber is brought to the basement. A DPU is placed there typically with local power and then connected to the patch panel to run up the building using existing copper wires.29DPU ON EACH FLOORFTTF (Fiber to the Floor)Larger buildingsFiber to riser (WDM-PON, GPON)DPU on each floor1:16 for each floor24 feasible now, 48 future

x16x16x16x16x16Fiber...Floor 1......Floor 211-May-15Sckipio | How Do We Make G.fast Real #In larger buildings, we bring the fiber up the riser to each floor. We call this fiber to the floor. A DPU is placed on each floor and then the DPU connects to the panel on each floor. This allows for high density buildings to be economically supported.30OUTDOOR PLANTRow housing Fiber down street (WDM-PON, GPON)DPU to each building or section of buildingReverse power feed from CPE to power DPU

11-May-15Sckipio | How Do We Make G.fast Real #In the outdoor plant, what is most typical is fiber will be run down the street either on a pole or in the ground. To ensure a high coverage, some companies are planning on using affordable 1:2 optical splitters and placing DPUs along the street close to the homes. This ensures a high penetration at a reasonable port count. DPUs can also be placed in pedestals or cabinets, too. In many cases, the power will come either from a reverse power feed from the consumers home or from forward power from the DSLAM.315 SECRETS TO SUCCEEDING IN G.FAST DEPLOYMENTS Model the businessFocus on powerUnderstand vectoringUnderstand the transition from VDSLFind the sweet spot11-May-15Sckipio | How Do We Make G.fast Real #To summarize, there are 5 secrets to follow. Understand the business model that G.fast offers, make sure you save every watt, use built-in vectoring to ensure responsiveness, recognize how to migrate smoothly from VDSL, build the right design for your MDU environment. G.fast has a lot to offer you and embrace the opportunity. 32ULTRA BROADBAND FOR THE MASSESThank you.33