Radcomms2012, Session Four: Spectrum for the National Broadband Network - Mike Quigley, NBN Co.
-
Upload
acma-australian-communications-and-media-authority -
Category
Technology
-
view
2.618 -
download
1
Transcript of 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
Image supplied by:
© NBN Co Limited 20122
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
© NBN Co Limited 20123
Estimated Net Marginal Cost by Platform
Illustrative Only
© NBN Co Limited 20124
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
© NBN Co Limited 20125
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
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
14:00 16:00 18:00 20:00 22:00 0:00 2:00 4:00 6:00 8:00 10:00 12:00
Average aggregate utilisation per 30 minute time period
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
14:00 16:00 18:00 20:00 22:00 0:00 2:00 4:00 6:00 8:00 10:00 12:00
Average aggregate utilisation per 30 minute time period
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
14:00 16:00 18:00 20:00 22:00 0:00 2:00 4:00 6:00 8:00 10:00 12:00
Average aggregate utilisation per 30 minute time period
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
14:00 16:00 18:00 20:00 22:00 0:00 2:00 4:00 6:00 8:00 10:00 12:00
Average aggregate utilisation per 30 minute time period
End User Traffic
Access Network Traffic
Aggregation Network Traffic
© NBN Co Limited 20126
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.
© NBN Co Limited 20127
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
© NBN Co Limited 20128
Mobile vs Fixed Wireless
© NBN Co Limited 20129
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.
1970
Wir
eles
s C
apac
ity
1980 1990 2000 2010 2012 Future
© NBN Co Limited 201210
• 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
© NBN Co Limited 201211
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
© NBN Co Limited 201212
© NBN Co Limited 2011
Long Term Satellite - spectrum summary
Return
Pat
hForw
ard Path
GateW
ay Uplink 27.0 – 28.5 GHz
17.7
– 1
8.2
GHz
18.8
– 1
9.3
GHz
19.7
– 2
0.2
GHz
VSAT Dow
nlin
k Cla
ss L
icen
se
VSAT Uplin
k 28
.5 –
29.
1 GHz C
lass
Lic
ense
GateWay Downlink (18.2 – 18.8 GHz)
Premises, VSATs Ground Stations
(ACM
A Cla
ss li
cens
e)
(ACM
A Cla
ss li
cens
e)
(ACM
A Cla
ss li
cens
e)S
atel
lite
Co
ntr
ol
Ka
ban
d
TT&C
© NBN Co Limited 201213
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
© NBN Co Limited 201214
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
© NBN Co Limited 201215
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)
© NBN Co Limited 201216
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 Co Limited 201217
NBN Long Term Satellite
© NBN Co Limited 201218
A view inside the spacecraft
Image from Thales Alenia Space website
© NBN Co Limited 201219
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
© NBN Co Limited 201220