Radcomms2012, Session Four: Spectrum for the National Broadband Network - Mike Quigley, NBN Co

© NBN Co Limited 20121

Mike Quigley, NBN Co

RadComms 2012

DisclaimerThis document sets out NBN Co’s proposals in respect of certain aspects of the National Broadband Network. The contents of this document represent NBN Co’s current position on the subject matter of this document. The contents of this document should not be relied upon by our stakeholders (or any other person) as representing NBN Co’s final position on the subject matter of this document, except where stated otherwise. NBN Co’s position on the subject matter of this document may also be impacted by legislative and regulatory developments in respect of the National Broadband Network. All prices shown in this document are exclusive of any GST. © NBN Co Limited 2012

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Solving the 10%

The Government's objective for NBN Co is:

• A minimum fibre coverage obligation of 90 per cent of Australian premises.

• All remaining premises will be served by a combination of next generation fixed wireless and satellite technologies – providing peak speeds of at least 12 megabits per second.

– Copper retained for telephony option


Estimated Net Marginal Cost by Platform

Illustrative Only


Challenges

General• Delivering the most cost-effective technology mix• Take-up and usage estimates• Explaining technology rollout requirements to users

Technical• Spectrum is a scarce resource• Spectral efficiency is approaching its limits• We cannot always place wireless towers in the ideal location• GNAF and cadastral data has its limitations


Fibre Access Node

EthernetAggregation

SwitchPOI

ACCESS VC CONNECTIVITY VCs

Advantage of Packet Networks – statistical multiplexing

• The common pathways (eg. CVCs) have less capacity than the total capacity that users could try and use.

• The behaviour of any individual end-user is unpredictable

• But as traffic gets aggregated, capacity utilisation becomes more predictable

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End User Traffic

Access Network Traffic

Aggregation Network Traffic


How capacity planning benefits NBN Co

• The equipment in our network is designed to make use of statistical multiplexing

• Large Scale Network Capacity Planning rule: 1Mbps = ~200GB / month

• A fixed customer base per access node (eg. wireless cell, satellite beam) permits deterministic capacity per end-user

• Eg. Satellite spot beam with 300Mbps of capacity over 1000 end-users = 300kbps of capacity per end-user

300kbps ≠ expected throughput per end-user.300kbps supports average downloads of 60 – 70GByte / month.


Capacities of the NBN Co Access Technologies

Technology Spectrum (MHz)

Down Capacity (Mbps)

Up Capacity (Mbps)

End-Users Down Capacity per User (kbps)

Up Capacity per User (kbps)

GPON Fibre (OLT) N/A 40,000 40,000 4,000 10,000 10,000

Fixed Wireless (sector) 20 40 9 60 660 150

Satellite (spot beam) avg 550 700 200 2,000 350 100


Mobile vs Fixed Wireless


NBN Co using LTE for fixed wireless

Future Wireless TechnologyThe NBN Co Fixed Wireless Network uses Time Division Duplex – Long Term Evolution (TD-

LTE) technology, a member of the 3GPP family of standards.

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• Wireless Trial commenced April 2012

• Trial scheduled to complete September 2012

• General Release of Fixed Wireless service planned October 2012

• 10 Service Providers providing or ready to provide Fixed Wireless Services

• 52 sites approved, 36 sites in construction

• Work currently underway in Ballarat, Toowoomba, Armidale, Darwin, Tamworth, Geraldton regions.

• 3 sites currently active

Fixed wireless rollout – on track


Satellite product overview and planned features

Feature Interim Satellite Long Term

AVC Speeds 6/1Mbps 12/1Mbps

Capacity per user 30kbps 350kbps

Telephony Support (via UNI-D)

Bitstream Connectivity Layer 3 (IP) Layer 2 (Ethernet)

Class of Service Two traffic classes Four traffic classes

Performance Enhancing Proxies

Enterprise Multicast -

POI Single Multiple

Typical Antenna diameter 1.2m 0.8m

Frequency band Ku Ka



Long Term Satellite - spectrum summary

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Capacity through spectrum re-use

• Spectral re-use patterns as used in mobile networks– Up to 54 GHz of accessible download spectrum

• 1.5 GHz• 2 polarisations• 9 serving gateways• 2 satellites

– Allocated to where the demand is

– Total 70 Gbps downloadand 20 Gbps upload


Access seeker and end-user features/benefits

Long Term Solution− Redundant High Capacity Ka Band satellites− 12/1Mbps services with VoIP Support− Typical antenna size 0.8m− Target 60GB Plans = 350kbps capacity allocation− Multiple POIs− Access to all NBN Products

Interim Satellite Service−6/1Mbps services with VoIP Support−NBN responsible for NTU−Targeting 6GB Plans (Peak hours) = 30kbps capacity allocation

ABG Service−Non-redundant and Limited Ku Band Capacity−Threshold Service 1M/256kbps−Typical antenna size range 0.84-1.2m−Access Seeker responsible for NTU−Typical 2-3GB Plans (Peak hour) = 10kbps capacity allocation−Single POI


Adding capacity through spot beams

INTERIM SATELLITE LONG TERM SATELLITE

•1National & 10 spot beams•Spot beams of 1 degree look angle

•101 beams per satellite•Small spot beams of 0.3 degree look angle (less than 300km diameter)


IPStar119.5°E

Optus D2 & D1

152 & 160°ENBN Co

135 - 150°E

Long-Term Satellite – planned orbital slots

Intelsat 8/19

166°E


NBN Long Term Satellite


A view inside the spacecraft

Image from Thales Alenia Space website


Satellite rollout update – on track

Interim Satellite Service – launched July 2011 • > 8000 services connected• Greater than 80% user satisfaction in terms of:

• speed and reliability• service and support from their provider • performance of applications • perceived value for money, and • their installation experience

• Very large improvement over previous satellite service• Nearly 70% would recommend ISS to families and friends

Long Term Satellite• Satellite contract signed with Space Systems Loral• Two of 10 ground stations announced• Slot confirmation progressing well• VSAT contracts finalised soon
