Post on 04-Apr-2018
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ICT KTN Stuart Revell
UK 800MHz LTEchallenges and opportunities
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ICT KTN Established by an industry led group of key players with funding from the
Technology Strategy Board
Bringing competitive advantage to the UK by: Facilitating the exchange of knowledge on ICT technology and services
Accelerating innovation in the sector
Facilitating focused working groups
Acting as a Network-of-Networks, working through other networks, industryassociations, support organisations and communities of interest
We have a comprehensive network of members spanning the entire valuechain
Membership visit us at www.ictktn.org.uk and join for free
+ =
The ICT KTN brings
together the former Digital
Communications andDigital Systems KTNs.
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Working group 2012 priorities Spectrum usage: Wireless WAN & LAN below 6GHz Key technologies
Efficiency and best use, taking into account: Energy, Size, Cost and Spectralefficiency
How to control and manage usage (inc. interference and coexistence). Cost and economies of scale how to leverage at continent level (Europe minimum).
Mapping technology capability, co-existence, interference issues
and timescales.
800MHz innovation, DTG LTE test bed, deployment, interference and co-existence challenges
RF Front End Technology challenge. Including new materials.
Future spectrum release. Issues arising from the release of new spectrum
supporting the 500MHz of Spectrum by 2020 initiative.
Spectrum sharing, management and trading. Technology and deployment
challenges, secondary use / dual use of spectrum inc white Space, cognitive
radio, spectrum management and trading.
https://ktn.innovateuk.org/web/spectrum
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Three reports -> Innovation test bed
June 2010 May 2011 August 2011
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800MHz coverage
May 2011
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Link budget scenarios
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% of Population penetration 'v' Area (Sq kms) of UK
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%PenetrationofPopulation
-59.2
Mp
eople
Area - % of total 242,514 km
60% of population in approx 10% of land area
High Density 40% of population in approx 3.5% of land area
Very High Density : High 20% of population in approx 1% of land area
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Additional base stations required for coverage expansion with
USB dongle at 800 MHz (2 x 10MHz carrier)
0
5,000
10,00015,000
20,000
25,000
30,000
35,000
40,000
45,000
50,000
90% 92% 94% 96% 98% 100%
Adddi
tionalsitesrequired
Population Coverage
32.4 Mbps
21.6 Mbps
14.4 Mbps
7.2 Mbps
In this scenario it is assumed that the terminal device has a zero gain antenna and that there is anaverage 10 dB building penetration loss. The rural cell size (radius) as a function of available peak bitrate is estimated to be as follows (based on a typical LTE link budget and COST-Hata propagation model)
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Additional base stations required for coverage expansion
with desktop modem or signal booster at 800 MHz (2 x10MHz carrier)
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
90% 92% 94% 96% 98% 100%
Addit
ionalsitesrequired
Population Coverage
32.4 Mbps
21.6 Mbps
14.4 Mbps
7.2 Mbps
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Additional base stations required for coverage expansion
with external antenna at 800 MHz (2 x 10MHz carrier)
0
200
400
600
800
1,000
1,200
1,400
1,600
1,800
90% 92% 94% 96% 98% 100%
Addit
ionalsitesrequired
Population Coverage
32.4 Mbps
21.6 Mbps
14.4 Mbps
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Coverageimprovement
example usingenhanced UE
antennas
Typical coverageto indoor dongles
Source: Ofcom 'Sitefinder' Mobile Phone Base Station Database http://www.sitefinder.ofcom.org.uk/
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, Deltenna Limited, 2011Slide #, Deltenna Limited, 2011
The WiBE connects users to the Internet ...
3G
WiFi
... using the 3G network
Internet
Clynog FawrBroadband = NothingDongle = 0.02 MbpsWiBE = 0.59 Mbps
SwaffhamBroadband = 0.5 MbpsDongle = NothingWiBE = 3.1 Mbps
You need a WiBE- fast, reliable 3G broadband
The WiBE propositionNo coverage?No fixed broadband?Slow broadband?
WiBE is a registered trademark of Deltenna Limited
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Interference and co-existence
August 2011
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Interference and co-existence matrix
Spectrum usersPotential Interferers
Cable(15-862MHz)
Cellular (791-862MHz)Digital TV
(470-790MHz)Short Range Devices
(863-870MHz)
PMSE(470-
790MHz)
S
ervicesimpac
ted
Cable(15-862MHz)
Yes potential co-channel and on
channel breakthroughinto CPE
Close proximity tobroadcast transmitter /
repeatersNo interference
Nointerference
Cellular (791-862MHz)
No interferenceYes responsibility of
Cellular to solve
Yes potentialadjacent channelinterference and
blocking
Yes, low probability potential adjacent
channel interferenceand blocking
Digital TV(470-
790MHz)Conventional
Systems
No interference
Yes Adjacentchannel ch60 and
image channels +9.Potential interferenceup to 100MHz away
from Tx channel.
No interference
No
prevented through band/ power management
Digital TV(470-
790MHz)Communal
Antennas
No interference
Yes same asconventional with
potential increase duesto higher amplification
stages and antennagain / height.
No interference
No prevented through band/ power management
Short RangeDevices (863-
870MHz)No interference
Yes - Potentialadjacent channelinterference and
blocking
No interferenceNo
Interference
PMSE
(470-790MHz)
No interference
Yes - Potentialadjacent channelinterference and
blocking
No prevented
through band / powermanagement
No interference
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Co-existence and interferencechallenges
Existing services:
1. Broadcast Television Digital TV (470-862MHz, Ch60)
2. Communal Antenna Systems (distribution of terrestrial broadcast to multiple
dwellings)
3. Cable Television and home media consumer platforms 15-862MHz
4. Short Range Devices (Adjacent band 863-870MHz, e.g. social alarms)5. PMSE applications (e.g. wireless microphones, in-ear monitors)
The challenges and opportunities this represents, provides the UK with some
significant opportunities for our R&D community to address locally and benefitthrough global exploitation.
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LTE-800 Base station (BS)interference to DTT CH60
Geometry of base stationto TV radio link.
Source: Ofcom Technicalworkshop 5/7/11
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LTE base station OOB causing
interference to DTT CH60
Geometry of base stationto TV radio link.
Source: Ofcom Technicalworkshop 5/7/11
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Communal aerials
Geometry of base stationto TV radio link.
Source: Ofcom Technicalworkshop 5/7/11
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Ch 60 UK TVFrequency Map
Source :http://www.ukfree.tv/mapsofsignal.php?c=60&a=1
Single TX coverage
area indicated in
green
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800MHz Spectrum plan
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Co-channel interference between
adjacent areas
Potential impact
of DTT on LTE
The emergent DTT clearance plan proposes that DTT clearance programme willtake place on a site by site basis through 2013
1) Co-channel interference from the remaining high power DTT services into any LTE servicesoperating in adjacent regions
2) Co-channel interference from any LTE deployment affecting the reception of DTT servicesin the remaining pre clearance areas
Field strength key
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Source: Ofcom Technical workshop 5/7/11
Households affected (No mitigation)
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Source: Ofcom Technical workshop 5/7/11
Households affected (with mitigation)
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Do you ever watch TV at home and
go on the internet at the same time?
Nielsen:
40 Percent of People Use Smartphones, Tablets While Watching TV
Source: http://www.pcmag.com/article2/0,2817,2394619,00.asp
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800MHz Spectrum plan
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LTE handset (UE) interference to
DTT CH57-60
72MHz offset from the wanted DTT channel can produce picture break up.
TV and Cable
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800MHz Interference and co-existencechallenges: Innovation priorities proposal
Spectrum users
Potential Interferers
Cellular (791-862MHz)Short Range Devices
(863-870MHz)
White Space(470-
790MHz)
Service
simpacted
Cable(15-862MHz)
Yes potential co-channel and onchannel breakthrough into CPE
No interferenceYes White Space devices inclose proximity to Home STB
Cellular (791-862MHz)
Yes potential adjacent
channel interference andblocking
Yes - potential issue around790MHz adjacent channel
Digital TV(470-
790MHz)Conventional
Systems
Yes Adjacent channel ch60 andimage channels +9. Potential
interference up to 100MHz away fromTx channel.
No interferenceYes Geo-location and sensing
to control access
Digital TV(470-
790MHz)Communal Antennas
Yes same as conventional withpotential increase dues to higher
amplification stages and antenna gain /height.
No interference
Yes Geo-location and sensingto control access . Could be
worse. Need to take accountanalogue distribution systems
Short Range Devices(863-870MHz)
Yes - Potential adjacent channelinterference and blocking
No interference
PMSE
(470-790MHz)
Yes - Potential adjacent channel
interference and blocking No interference
Yes Geo-location and sensing
to control access
DTG LTE Test bed
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DTG LTE test bedDTT / SAT Feed
VictimsSTB / DTT /CABLE / SRD
Test chamber
LTE Base
station
LTE Mobile
Innovation opportunities
Victim solutions Transmitted signal (Mobile & BS)
Terminal radiation Signal loading innovation
establish worse case LTE signals
to avoid
LTEsignals
Test models orreal signals?
Test &Measurement
Test and measurement
Mobile test model BS test model Industry standard models
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DTG Facilities Vauxhall, London
GTEM Cell in basement Zoo multiple kit feeds
Signals can be patched between the two
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DTG LTE Test bed definition /
recommendations Do not duplicate Ofcom Baldock SRD test bed.
Ensure tests are credible and can help to inform industry.
Lessons learned from previous activities need to be shared todefine process and specifications to avoid duplication and toavoid not using work / results already conducted.
Parameters and variables need to be agreed by test bed
partners.
Mechanism need to be agreed to inform radio planning andsimulation / modelling aspects for deployment and co-existence challenges.
Industry agreed test models
Significant contributor to MitCo.
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DTG LTE Test bed Innovation opportunities
Short term
Base station
Transmitter mask / filters / OOB
Antenna
Radio planning
UE and Base station - L2 MAC and scheduling
Radio planning: co-operative, cellular and broadcast
Home / CPE
Antennae
Amplifiers
Filters
Cables
Connectors
Longer term Collaborative CPE
Collaborative networks
Shared infrastructure
White Space innovation
New spectrum allocation 700MHz
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800MHz Spectrum plan
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SRD - Ofcom Baldock Test Bed Additional tests completed in Lambeth .
http://stakeholders.ofcom.org.uk/binaries/consultations/tl
c/annexes/LTE_UE.pdf
Baldock SRD test bed bring your device to test?
o Set up by end of Q1 2012
o Recorded LTE UL signals played back High,Medium and Low loading.
o Focused on Social Alarms but open to all SRDs
Further information:http://stakeholders.ofcom.org.uk/binaries/consultations/tlc/annexes/test-facility.pdf?utm_source=updates&utm_medium=email&utm_campaign=test-facility
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UK Critical Infrastructure:
Drive UK societal and economic value through globallyexploitable UK innovation
ICT the 21st century utility !
INDUSTRY
Inward investment andglobal exploitation