TV White Space Communication System: NICT’s Device and … · 2014-12-04 · Wired/Wireless...
Transcript of TV White Space Communication System: NICT’s Device and … · 2014-12-04 · Wired/Wireless...
TV White Space Communication System: NICT’s Device and DatabaseTechnologies and Prototypes
Kentaro Ishizu and Ha Nguyen TranKentaro Ishizu and Ha Nguyen Tran
Smart Wireless Laboratory Wireless Network Research InstituteSmart Wireless Laboratory, Wireless Network Research Institute,
National Institute of Information and Communications Technology, Japan
1 Copyright © 2014 National Institute of Information and Communications Technology. All Rights Reserved
December 03-04, 2014@ETSI RRS Workshop
NICT’s R&D on White SpaceNICT’s R&D on White Space
System developmentsWhite Space Database (FCC, Ofcom, Japan)White Space Device (WLAN, WRAN, LTE)
Comply with FCC&ETSI requirements on spectrum mask
StandardizationIEEE 802.11af / IEEE 802.15.4m / IEEE 802.19.1 /IEEE 802.11af / IEEE 802.15.4m / IEEE 802.19.1 /IEEE 802.22bDySPAN-SC / IEEE 1900.4 / IEEE 1900.6ITU-R WP5A
Field trialsField trialsLong-distance (over 10km)Heterogeneous multi-hoping (IEEE 802.22 + IEEE 802.11af)
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g p g ( )
Mobile broadband (over 40Mbps)
Overview of WS system developed by NICTOverview of WS system developed by NICT
ViewerViewer Viewer
TVWS DB
Viewer
Engine(U S FCC)
Engine(U K OFCOM)
Engine(J )
・・・・
I/F
(U.S. FCC) (U.K. OFCOM) (Japan)
I/F (IETF PAWS)Plug‐inPlug‐in
Engine(Others)
Engine
I/F (PAWS)
Engine
I/F (PAWS)
Engine
I/F (PAWS)
E i
I/F (PAWS)
IEEE 802.11afIEEE 802.19
Engine(CDIS/CM)
Engine(RLSS)
IEEE 802.22
(Spectrum Manager)
White Space LTE
Engine(Manager)
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Co-existence Wireless LAN Wireless RAN
Part I: White Space DevicePart I: White Space Device
IEEE 802.11af-based system
Complied with ETSI 301 598 v1 0 0Complied with ETSI 301 598 v1.0.0
IEEE 802 22-based systemIEEE 802.22-based system
LTE based systemLTE-based system
Complied with ETSI 301 598 v1.0.0
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IEEE 802.11af systemIEEE 802.11af system
IEEE 802.11af-2013 was published in Feb. 2014.
Amendment for TVWS operation of wireless LAN
System IEEE 802.11af PHY/MAC
Amendment for TVWS operation of wireless LAN
Carrier frequency 470-710 MHz
Channel bandwidth 6 MHzSignal bandwidth 4.83 MHzTx power 10 mWTx power 10 mWModulation BPSK, QPSK, 16-QAM, 64-QAMError correcting code Convolutional code
(coding rate: 1/2,2/3,3/4,5/6)Multiple access CSMA/CAMultiple access CSMA/CAMultiplexing OFDMFFT size/clock 128 points / 5.33 MHz
Usable as Access Point (AP) or Station (STA) according to software
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Station (STA) according to software configuration
Spectrum maskSpectrum mask
Satisfy the spectrum mask for portable device requested by FCC (In-band PSD limit 2.6 dBm/100kHz, Out-band PSD ( ,limit -52.8 dBm/100kHz)
-10
0
10
100k
Hz] (*) Federal Communications
Commission, “Unlicensed Operation in the TV Broadcast Bands ” Third Memorandum
-30
-20
sity
[dB
m/ Bands, Third Memorandum
Opinion and Order, FCC. 12-36, Apr. 5, 2012.
PSD: power spectral density
-60
-50
-40
ectr
um d
en
PSD: power spectral density
-80
-70
Pow
er s
pe
34 chTx power: 10 dBmMax hold
FCC spectrum mask (Portable device)
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-90594 595 596 597 598 599 600 601 602 603 604
Frequency [MHz]
P
IEEE 802.11af system (high power)IEEE 802.11af system (high power)
Operating freq. 470-770 MHz
Multiple access CSMA/CA
TX signal OFDM
Modulation BPSK, QPSK, 16QAM, 64QAM
Occupied BW 4.8 MHz
RF power 30 dBm
Spec. version IEEE 802.11af/D5.0 (PHY)IEEE 802.11af/D2.0 (MAC)
The Spectrum mask satisfies ETSI device emission class 5.
Usable as Access Point (AP) or Station (STA) according to software configuration
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g
IEEE 802.22 systemIEEE 802.22 systemTRX unit.
IEEE 802.22-2011 was published in 2011 for Regional Area N t k (RAN) ti iNetwork (RAN) operation in TVWS that supports long-distance networking.
MAC control unit
Original extension to use non-contiguous multi channels.
Carrier frequency 470-710 MHz
Channel bandwidth 6 MHz
TRX unit / RF control unit PA unit.
MAC Control Unit
IP network
Channel bandwidth 6 MHz
Signal bandwidth 5.6 MHz
TRX/PA unit output 1 mW/1W
Modulation QPSK, 16-QAM, 64-QAM
TCP/IP stack
MAC ControllerSpectrumManager
MACBB
MACBB
GPSReceiver Modulation QPSK, 16 QAM, 64 QAM
Error correcting codeConvolutional code(coding rate: 1/2,2/3,3/4,5/6)
Multiple access OFDMA
BBRF
BBRF
RF Control Unit
ece ve
PA unit
TRX Unit
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FFT size/clock 2048 point/6.86MHzPA unit
(High Power Amplifier and Band-Pass Filter)
AntennaDeveloped by Hitachi Kokusai Electric
White Space LTE system (eNB and CPE)White Space LTE system (eNB and CPE)
Evolved packet Core TVWS DatabaseNICT Server room
InternetInternet
Operating freq. 470-710 MHz
eNB CPE
LTE eNB for TVWSp g q
Duplex mode FDD / TDD
Operation BW 5, 10, 20 MHz【Terminal】
【Network】 TV band
RF power 30 dBm (BS), 20 dBm (CPE)
RX sensitivity -90 dBm (QPSK throughput 95%)
3GPP spec LTE release 8LTE UE Adaptor
USB plug
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3GPP spec. LTE release 8
The Spectrum mask satisfies ETSI device emission class 5.
White Space LTE system (smart phone)White Space LTE system (smart phone)
Capable of switching between TVWS and commercial band
Same size weight and OS as commercial smart phoneSame size, weight and OS as commercial smart phone
TDD for WS, FDD for commercial band
Item Description
UHF 470 710 MH (TVWS)Frequency
UHF : 470−710 MHz (TVWS)Band 1 : 1,920−1,980 MHz (uplink)
2,110−2,170 MHz (downlink)
Bandwidth 5, 10, 20 MHz
RF power Up to 20 dBm
ModulationBPSK / QPSK / 16QAM / 64QAMBPSK : Control64QAM : Downlink data channel64QAM : Downlink data channel
Duplex methodUHF : TDDBand 1 : FDD
MultiplexingOFDMA (downlink)SC FDMA ( li k)
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p gSC-FDMA (uplink)
Part II: White Space DatabasePart II: White Space Database
Ofcom databaseFollowing Ofcom rulesgUK’s primary users data provided by OfcomPassed Ofcom’s qualification tests.qListed as one of the databases qualified for the OfcomTV White Space Pilot in UK.
FCC d bFCC databaseFollowing FCC rules (FCC 08-260, FCC 10-174)E l t d ith J ’ i d tEvaluated with Japan’s primary users data.
Japan’s propagation modelFollowing the propagation model specified for TVFollowing the propagation model specified for TV broadcasting in Japan (No. 640, 1960)Evaluated with Japan’s primary users data.
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p p y
White Space DatabaseWhite Space Database
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Ofcom DatabaseOfcom Database
DatasetsDTT dataset: maximumDTT dataset: maximum permitted EIRP in each Digital Terrestrial Television (DTT) channel in each 100m(DTT) channel in each 100m x 100m pixel
PMSE dataset: assignment i f i f hinformation of the Programme Making and Special Events (PMSE).
Elevation data: Ordance Survey OS Terrain 50
Clutter data: LCM2007 25mClutter data: LCM2007 25m raster data, used for Hata model calculation.
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Operational Parameter Information System (OPIS)Operational Parameter Information System (OPIS)
Input parameters:Request typeStart timeStart timeDevice categoryDevice typeDevice classDevice classAntenna heightAntenna height typeLatitudeLatitudeLongitudeUncertainty
Map data: © 2014 Google
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WSDB qualification processWSDB qualification processEvent Time
Draft contract Oct 2013
Recommendation Nov 2013
Offline testsVerification that the following
l l ti t Recommendation about clutter data
Nov 2013
Contract agreement Dec 2013
calculations are correctCalculation of P1(Fj)Calculation of PWSD-PMSE(Fj) spectral densit
DTT dataset received Jan 2014
spectral densityCalculation of the final maximum transmission powerCalculation of the coverage area
Offline tests start Jan 2014
Offline tests finish May 2014
Calculation of the coverage area of the Master, etc
Comparing DB’s results with reference values
Online tests start May 2014
Online tests finish Jun 2014
reference values
Online testsf f f Qualification
notification11 Jun 2014
Added to the list of 17 Jun 2014
Verification of the handling of PMSE scheduled/unscheduled updates, power adjustments t
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qualified DBsetc.
List of qualified databaseList of qualified databasehttps://tvws databases ofcom org uk/https://tvws-databases.ofcom.org.uk/
Ofcom provides a list of qualified WSDBs in the XML format.
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The list includes URL of each WSDB.
Part III: Field ExperimentsPart III: Field Experiments
Field experiment in Japan
In Tono city Iwate prefectureIn Tono city, Iwate prefecture
Duration: Nov. ~ Dec. 2013
Field experiment in UK
In LondonIn London
Duration: Jul. 2014
Within the framework of Ofcom TV White Space PilotWithin the framework of Ofcom TV White Space Pilot
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Overview of the field experiment in JapanOverview of the field experiment in Japan
Period: Nov. 25 – Dec. 4, 2013
Location: Tono city, Iwate prefecture, Japan
Located in 30km away from Pacific ocean coast
Played an important role after the Great earthquake on March 11, 2011 because the city was not swept away but close to the coast.
Wired/Wireless networks were damaged.Flexible and robust wireless networks were demanded.
TV White Space may be suitable for disasterrecovery activities in terms of radio propagation (low path-loss, diffraction, etc.) due to lower frequency band than cellular systems.frequency band than cellular systems.
Need to evaluate based on practicalscenarios.
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Joint work with Hitachi Kokusai Electric
Field Experiment - SetupField Experiment - Setup
12.7km802.11af
802 22
Tono city, Japan
802.22
802.22 802.22
Takashimizu (highland)Sadato (highland)
Location Ground height (m)
Antenna height above ground (m)
EIRP (W)
Center Frequency
(MHz)
IEEE 802.22 system
Sadato (highland)g ( ) ( )
Center 300 20 2.9599.1611.1647.1
Takashimizu(to Sadato)(to center)
760710
1212
3.80.97
S d t 730 12 3 8No wired or wireless broadband Internet access in the highlands
3 Element Ring-Yagiantenna with 7.65 dBi
Sadato 730 12 3.8
Location Ground height (m)
Antenna height above
EIRP (W)
Center Frequency
IEEE 802.11af system
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Tono City Disaster Prevention Center (downtown)
antenna with 7.65 dBi(F/B > 10dB)
height (m) height above ground (m)
(W) Frequency (MHz)
Takashimizu(AP and STA)
760 2.5(on car roof)
0.016 623.0
Results – scenario 1 and 2 (long-distance)Results – scenario 1 and 2 (long-distance)
SadatoCPE
Takashimizu BSEIRP:3.8WCPE
EIRP:3.8W
12m
EIRP:966mW
The center
BSEIRP:2.9W
12m
The center
20m
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Results – scenario 3 (heterogeneous multi-hop)Results – scenario 3 (heterogeneous multi-hop)
InternetTV white space utilization Smart phone
Laptop PC
IEEE 802.22 IEEE 802.11af
IEEE 802.11b/g/nIEEE 802.22-IEEE 802.11af relay
backbone Area deployment
6.3km 200m coverage
Base station Access point StationCPE AP
Prevention center (urban area)
Takashimizu Highland
CPE: Customer Premises EquipmentDifficult to have (wired or wireless) broadband Internet access
System configuration
IEEE 802.22 (Tx power 1W, 36ch) :Backhaul link (6.3 km)
IEEE 802 11af (Tx power 10mW 38ch) :Area expansion (200m)
broadband Internet access
IEEE 802.11af (Tx power 10mW, 38ch) :Area expansion (200m)
IEEE 802.11b/g/n :Off-the-shelf devices
Applications:W b it b i Vid t i (Y T b ) Vid h tti (Sk )
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Web site browsing, Video streaming (YouTube), Video chatting(Skype)
Summary of experiments in JapanSummary of experiments in Japan
Using IEEE 802.22 (1 TV ch.), confirmed UL 4.5 Mbps/DL 5.2 Mbps over 12.7 kmco ed U 5 bps/ 5 bps o e
Using IEEE 802.22 (non-contiguous 2 TV chs.),Using IEEE 802.22 (non contiguous 2 TV chs.), confirmed UL 9.0 Mbps/DL 15.5 Mbps over 6.3 km
Using IEEE 802.22 (backhaul link) and IEEE 802.11af (area access), established a multi-hop network to provide Internet access in mountain area
Off-the-shelf wireless LAN devices could access the Internet
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U.K. Ofcom White Space PilotU.K. Ofcom White Space Pilot
Ofcom introduced a pilot of the UK framework for access to TV white spaces during a stakeholder event in April 2013.
Requirements
DatabaseDatabaseSubject to the contract
between Ofcom and DB provider
DeviceNeed to obtain license
Conform to ETSI specificationsConform to ETSI specifications
NICT participationp p
As a database developer
As a device developer WS Device(WSD)
WS Database(WSDB)
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(WSD) (WSDB)
Figure source: http://stakeholders.ofcom.org.uk/binaries/spectrum/whitespaces/Pilot_Slides.pdf
Field experiments under the Ofcom WS pilotField experiments under the Ofcom WS pilot
Period: July 7-17 2014
Location: London, U.K.
TV band in U.K.
Freq : 470 790MHzFreq : 470-790MHz
Bandwidth : 8MHz
CH No : 21 60 (total 40 channels)CH No. : 21- 60 (total 40 channels)
Two casesTwo cases
Mobile broadband access (White Space LTE)
Fi d i t t i t li k (IEEE 802 11 f)
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Fixed point-to-point link (IEEE 802.11af)
Results of mobile broadband access (LTE)Results of mobile broadband access (LTE)
Parameter ValueDuplex Mode FDD, TDD
Channel FrequencyDL:714 MHz UL:626 MHz (FDD),
Results (downlink throughput)45.4Mbps (FDD, 20MHz×2)
Channel Frequency682 MHz (TDD)
Channel Bandwidth 20 MHzWS eNB Tx Power 14.2 dBm (FDD), 16.2 dBm (TDD)Spatial Multiplexing SIMO
19.5Mbps (TDD, 20MHz)
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PDSCH Modulation 64QAMTDD Subframe Ratio DL:UL = 4:4
Results of fixed point-to-point link (IEEE 802.11af)Results of fixed point-to-point link (IEEE 802.11af)
The Thames River
London Bridge
Location 1
St John’sRiver
King's Stairs Gardens
WaterlooSt John s Churchyard
3-element Ring Yagi (7.4dBi)
Distance : 3.7 kmData rate : 2Mbps
(36dB EIRP)
D k HillLocation 2
(36dBm EIRP)
Denmark Hill
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Summary of experiments in U.K.Summary of experiments in U.K.
Verified a framework of practical wireless communications in TVWS
Database function to protect TV broadcasts and PMSE (radio microphones, etc.)
Device development feasibility to follow the spectrum mask
M d d li k th h tMeasured downlink throughput
Mobile broadband (TVWS LTE) 45 4Mbps (FDD 20MHz×2) / 19 5Mbps (TDD 20MHz)45.4Mbps (FDD, 20MHz×2) / 19.5Mbps (TDD, 20MHz)
Fixed point-to-point (IEEE 802.11af) 2Mbps over 3.7km with EIRP 36dBmp
Experienced very strong TV signals which is subject to a future
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R&D topic
ConclusionsConclusions
White Space DatabaseFollowing rules of FCC / Ofcom / JapanIETF PAWS interface
Whit S D iWhite Space DevicesIEEE 802.11af / IEEE 802.22 / LTEComply with FCC/ETSI requirements on spectrum maskComply with FCC/ETSI requirements on spectrum mask
TrialsLong-distance point-to-point network
IEEE 802.22 (with 1 ch) UL 4 5 Mbps/DL 5 2 Mbps over 12 7 kmUL 4.5 Mbps/DL 5.2 Mbps over 12.7 km
Mobile broadbandTVWS LTE
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45.4Mbps (FDD, 20MHz×2) / 19.5Mbps (TDD, 20MHz)
ReferencesReferences
NICT Press Release, “World’s First Breakthrough Achieved for Long-Range Broadband Communications in TV White Space,” Jan. 23, 2014. (http://www.nict.go.jp/en/press/2014/01/23-1.html)
NICT Press Release, “Trials of TV White Space Communications at 40Mbps in Central London - withNICT Press Release, Trials of TV White Space Communications at 40Mbps in Central London with Qualified White Space Database under UK Ofcom Pilot,” Jul. 24, 2014. (http://www.nict.go.jp/en/press/2014/07/24-1.html)
K. Ishizu, K. Hasegawa, K. Mizutani, H. Sawada, K. Yanagisawa, K. B. Toh, M. Takekawa, T. Matsumura, S. Sasaki M Asano H Murakami and H Harada " Field Experiment of Long-distance BroadbandSasaki, M. Asano, H. Murakami and H. Harada, Field Experiment of Long distance Broadband Communications in TV White Space," IEICE Technical Report, vol. 113, no. 457, SR2013-105, pp. 61-68, Mar. 2014.
H. Sawada, T. Kan, K. Mizutani, K. Ishizu, H. Murakami, H. Harada, “A Study on Propagation Loss Model for TV White Space Systems ” “ IEICE Technical Report vol 113 no 457 SR2013-106 pp 69-74 Mar 2014TV White Space Systems, , IEICE Technical Report, vol. 113, no. 457, SR2013-106, pp. 69-74, Mar. 2014.
K. Ishizu, K. Hasegawa, K. Mizutani, H. Sawada, K. Yanagisawa, K. B. Toh, T. Matsumura, S. Sasaki, M. Asano, H. Murakami and H. Harada, "Field Experiment of Long-distance Broadband Communications in TV White Space Using IEEE 802.22 and IEEE 802.11af," WPMC 2014, Sep. 2014.
H. N. Tran, K. Ishizu, H. Harada. “Development and evaluation of a TVWS database for the UK Ofcom TVWS trial,” IEICE Technical Report, SR2014-23, Jul. 2014.
K. Ibuka, T. Matsumura, K. Ishizu, H. Murakami, H. Hiroshi, “White-space LTE System in the UK Digital , , , , , p y gTerrestrial TV Band (1) - Development and Field Experiment of WSD Operational Environment cooperated with WSDB,” IEICE Technical Report, vol. 114, no. 295, RCS2014-208, pp. 67-72, Nov. 2014.
T. Matsumura, K. Ibuka, K. Ishizu, H. Murakami, H. Hiroshi, “White-space LTE System in the UK Digital Terrestrial TV Band (2) - Specification and Evaluation of White-space Devices for Interference
29 Copyright © 2014 National Institute of Information and Communications Technology. All Rights Reserved
Terrestrial TV Band (2) Specification and Evaluation of White space Devices for Interference Avoidance,” IEICE Technical Report, vol. 114, no. 295, RCS2014-209, pp. 73-78, Nov. 2014.
AcknowledgementThe authors would like to express their sincere thanks to Dr. Oliver Holland, Shuyu Ping, Dr. Reza Akhavan and other colleagues from King's College London for their supports to NICT’s trial in London within the Ofcom TV White Space Pilot framework in July 2014.p y
Morton, D., Rowland, C., Wood, C. Meek, L., Marston, C., Smith, G. Simpson, I.C. 2011. Final report for LCM2007 – the new UK land cover map CS Technical Report No 11/07 NERC/Center forcover map. CS Technical Report No 11/07 NERC/Center for Ecology & Hydrology 108pp. (CEH project number: C03259).
Contact InformationSmart Wireless Laboratory
Wireless Network Research Institute, NICT, Japan.
Dr. Kentaro Ishizu, [email protected]
D H N T h @ i t j
30 Copyright © 2014 National Institute of Information and Communications Technology. All Rights Reserved
Dr. Ha Nguyen Tran, [email protected]