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)


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)


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


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


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)


-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


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


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


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)


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.


p p y

White Space DatabaseWhite Space Database


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.


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


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


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.


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


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.


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


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


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 )


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


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)


(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)


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)


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


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


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


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


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


Dr. Ha Nguyen Tran, [email protected]

TV White Space Communication System: NICT’s Device and … · 2014-12-04 · Wired/Wireless...

Documents

Transcript of TV White Space Communication System: NICT’s Device and … · 2014-12-04 · Wired/Wireless...