Cognitive Radio & The Whitespace Revolution
A New Zealand Perspective
Sponsored in part by
1Wednesday, 27 February 13
2Wednesday, 27 February 13
2Wednesday, 27 February 13
Waikato Region: Population 416,000Density: 1-4000 per sq km
Wikimedia Commons ImageUser: Vardion
<11510501002505007501000200030004000
|---- 20km ----|
3Wednesday, 27 February 13
Lower Population Density Higher
Cost
/Com
plex
ity
Fibre
Wireless
Satellite
4Wednesday, 27 February 13
Waikato Region: Population 416,000Density: 1-4000 per sq km
Wikimedia Commons ImageUser: Vardion
<11510501002505007501000200030004000
|---- 20km ----|
5Wednesday, 27 February 13
Summary:Terrestrial broadbandonly economic for<50 people / km2
6Wednesday, 27 February 13
Image Credit: http://commons.wikimedia.org/wiki/User:Dschwen
New Zealand invests $300M in Rural Broadband 2011-2016
7Wednesday, 27 February 13
45,000 households in New Zealandare still economically excluded.
8Wednesday, 27 February 13
What can we do to make broadband more economic for <50 people / km2 ?
9Wednesday, 27 February 13
Radio Spectrum
Electromagnetic Spectrum10Wednesday, 27 February 13
Not All Spectrum is EqualFr
eque
ncy
2.4GHz: Wi-Fi2.1GHz: 3G1.8GHz: 2G & LTE900MHz: 3G700MHz: LTE500-700MHz: UHF Television100MHz: Radio
Grea
ter P
enet
ratio
n
Ante
nna S
ize
11Wednesday, 27 February 13
Radio Licensing
Regional
National Link
Area12Wednesday, 27 February 13
Rural Fixed Wireless Coverage 201713Wednesday, 27 February 13
We’re doing it wrong.
14Wednesday, 27 February 13
The Electrospace Model* of Radio Spectrum Reflects The Reality of Modern Radio Applications.
See Matheson (2011)“The Technical Basis for Spectrum Rights:
Policies to Enhance Market Efficiency”
15Wednesday, 27 February 13
Electrospace
16Wednesday, 27 February 13
Where & when there’s no signal in an Electrospace, we have Whitespace.
17Wednesday, 27 February 13
UHF TV Coverage AreaWhitespace
Whitespace: A Simple Example18Wednesday, 27 February 13
Typical TV Broadcast Configuration
Tower A:Ch: 1,3,5,7,9
Tower B:Ch: 2,4,6,8,10
TVWS:2,4,6,8,10
TVWS:1,3,5,7,9 TVWS:
ALL
X Y Z
19Wednesday, 27 February 13
How does this look to aSpectrum Analyser?
20Wednesday, 27 February 13
Wellington, New Zealand UHF Broadcast Spectrum, 30-08-11
21Wednesday, 27 February 13
Wellington, New Zealand UHF Broadcast Spectrum, 30-08-11
W
21Wednesday, 27 February 13
Wellington, New Zealand UHF Broadcast Spectrum, 30-08-11
W HI
21Wednesday, 27 February 13
Wellington, New Zealand UHF Broadcast Spectrum, 30-08-11
W HI T E S P A C
21Wednesday, 27 February 13
Wellington, New Zealand UHF Broadcast Spectrum, 30-08-11
W HI T E S P A C E
21Wednesday, 27 February 13
Wellington’s Not SpecialIt’s Like That Everywhere
22Wednesday, 27 February 13
23Wednesday, 27 February 13
Why are we not using Whitespace right now?
24Wednesday, 27 February 13
How can we use whitespace without breaking existing services?
25Wednesday, 27 February 13
How can we use whitespace without breaking existing services?
Cognitive Radio
25Wednesday, 27 February 13
Cognitive RadioAwareAdaptsSensesInteracts
26Wednesday, 27 February 13
And it’s real.
27Wednesday, 27 February 13
IEEE 802.22 is the first Wireless Regional Area Networking standard.
28Wednesday, 27 February 13
IEEE 802.22 delivers fixed wireless broadband using Cognitive Radio in TV Whitespace Spectrum
29Wednesday, 27 February 13
IEEE 802.22Protects Primary Users
30Wednesday, 27 February 13
IEEE 802.22Protects Primary Users
31Wednesday, 27 February 13
IEEE 802.22Protects Primary UsersUsing Geolocation & Spectrum Databases
31Wednesday, 27 February 13
IEEE 802.22Protects Primary Users
32Wednesday, 27 February 13
IEEE 802.22Protects Primary UsersUsing Geolocation & Spectrum Databases
32Wednesday, 27 February 13
IEEE 802.22Protects Primary UsersUsing Geolocation & Spectrum DatabasesAnd Spectrum Sensing
32Wednesday, 27 February 13
So how doesIEEE 802.22compare?
33Wednesday, 27 February 13
802.22 Channel Size: 6MHz
0
10
20
30
40
802.11 802.16 802.22 WCDMA LTE
MHz
34Wednesday, 27 February 13
802.22 Spectral Efficiency
0
5
10
15
20
802.11g 802.16 802.22 WCDMA LTE
bits p
er Hz
35Wednesday, 27 February 13
Spectrum Availability
0
75
150
225
300
TVWS 700MHz 900MHz 1800MHz 2100MHz 2.4GHz
MHz
36Wednesday, 27 February 13
What AboutIn Real Life?
37Wednesday, 27 February 13
Wi-Fi vs TVWS Community Studies
Three Rural New Zealand CommunitiesModeled with Awe WinProp at 25MSame Emitted Power for Both Technologies
(4 Watts EIRP)Like for Like Subscriber Antenna Sizes
38Wednesday, 27 February 13
Parikino, Whanganui River Valley
39Wednesday, 27 February 13
Parikino AreaWhanganui River Valley
40Wednesday, 27 February 13
Parikino on Wi-Fi: 18 Houses Ok41Wednesday, 27 February 13
Parikino on TVWS: 28 Houses Ok42Wednesday, 27 February 13
Cognitive Radio inTV Whitespace
Has Real Potentialfor Rural Broadband
43Wednesday, 27 February 13
It changes the economics of rural wireless
TVWS
2 pax / km2
44Wednesday, 27 February 13
Trials are on inSingapore, UK, US. Expect hardware in
2-3 years
45Wednesday, 27 February 13
Paper available:
http://tinyurl.com/bph5amfor
https://internetnz.net.nz/system/files/pages/2012/telco2_whitespace_study_community_examples_final.pdf
46Wednesday, 27 February 13
Thank You!
Sponsored in part by
47Wednesday, 27 February 13