Mobile Broadband SIG 080312 - Stuart Revell

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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