Update on Industry Canadas White Space Database Specification (DBS-01) Joint Industry Canada/RABC...

Update on Industry Canada’s White Space Database

Specification (DBS-01)

Joint Industry Canada/RABC Stakeholder Discussion - Ottawa, ONMay 14th 2013

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DBS-01 White Space Database Specification

Sets the minimum technical requirements for the designation of a database capable of indicating available channels for use by white space devices (WSDs)

Intent

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White Space Database (WSDB)

Provides lists of available channels to WSDs

Ensures protection of all licensed services and systems operating in the WS frequency bands

Uses geo-location to manage the operation of WSDs

DBS-01 White Space Database Specification

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White Space Frequency Bands

Note 1: Exclusion of Ch. 3-4 due to the use by consumer electronic devices in North America.Note 2: Exclusion of Ch. 37 due to protection of radio astronomy and wireless medical telemetry.

DBS-01 White Space Database Specification

Frequency Bands(MHz)

TV Channels Personal/PortableWSD

FixedWSD

54-60 2 -

60-72 3-4 [Note 1]

76-88 5-6 -

174-216 7-13 -

470-512 14-20 -

512-608 21-36

608-614 37 [Note 2]

614-698 38-51

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DBS-01 White Space Database Specification

Licensed Services and Systems to be Protected

Over-the-Air (OTA) TV Broadcasting;

Remote Rural Broadband Systems (RRBS) base stations;

Licensed Low Power Apparatus (LPA);

Radio astronomy, and

Medical telemetry

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Over-the-Air TV Broadcasting

WSDBs shall protect on-air stations only of the following:– Regular Power (DTV, Analog TV)

– TV Translators, TV Boosters

– Low Power/Very Low Power (DTV, Analog TV)– TV translators, TV Boosters– Receive-only stations making use of TV broadcast

signals such as cable TV head-ends and low-power TV receive sites

DBS-01 White Space Database Specification

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Current Status of OTA TV in Canada

Regular Power TV Stations: 341– Digital: 188 (mostly in urban markets)

– Analog: 153 (mostly in suburban markets)

LP TV Stations: 640 (mostly in suburban markets)

– Digital: 24 – Analog: 616

DBS-01 White Space Database Specification

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Broadcast TV Protected Contours

Note: Refer to BPR-10 for DTV and BPR-4 for Analogue TV

DBS-01 White Space Database Specification

Type of TV station TV Channel Thresholds for Broadcast TV

Protected Contour(dBµV/m)

Propagation Curve

Analog (full and low power)

Low VHF (Ch. 2-6) 47 F(50,50)

High VHF (Ch. 7-13) 56 F(50,50)

UHF (Ch. 14-51) 64-20log(615/F) F(50,50)

Digital (full power)

Low VHF (Ch. 2-6) 28 F(50,90)

High VHF (Ch. 7-13) 36 F(50,90)

UHF (Ch. 14-51) 41-20log(615/F) [Note 5] F(50,90)

Digital (low power)

Low VHF (Ch. 2-6) 43 F(50,90)

High VHF (Ch. 7-13) 48 F(50,90)

UHF (Ch. 14-51) 51-20log(615/F) [Note 5] F(50,90)

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TV Protection Contour Example

DBS-01 White Space Database Specification

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Interference Protection Criteria for TV Receiver Separation Distances

Protection of TV broadcasting from harmful interference by WSDs requires a physical separation.

The minimum separation distance is calculated using TV Broadcast Protected Contour values, TV Protection Ratios, the ERP WSD, EHAAT of the WSD, and the F-Curves.

Methodology on the Derivation of the Required Separation Distance to the TV Broadcast Protected Contours is shown in Appendix B.

DBS-01 White Space Database Specification

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Sample of the Minimum Separation Distances from Fixed WSD to Broadcast TV Contours

DBS-01 White Space Database Specification

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Sample of the Minimum Separation Distances from Mode II P/P to Broadcast TV Contours

DBS-01 White Space Database Specification

* WSDs with power levels of 40 mW (16 dBm) or less may operate within the protected contours of adjacent channel RRBS stations.

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Fixed WSDs – Protect RRBS for co-channel, 1st adjacent and 2nd

adjacent channels based upon the associated RRBS protection criteria.

Personal/portable mode II WSDs – Protect RRBS stations for co-channel and 1st

adjacent channels.

WSDs with power levels of 40 mW (16 dBm) or less may operate within the protected contours of adjacent channel RRBS stations.

Remote Rural Broadband Systems (RRBS)Protection

DBS-01 White Space Database Specification

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Remote Rural Broadband Systems (RRBS) Protection Criteria

DBS-01 White Space Database Specification

Channel RRBS Station Protection Criteria

(dBµV/m)

Co-Channel 37.8

1st Adjacent 69.0

2nd Adjacent 91.6

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Minimum Separation Distance of Fixed WSD to RRBS Station

DBS-01 White Space Database Specification

EHAAT of Fixed WSD

Required Separation from RRBS Base Station Contour(km)

Co-channelusing F(50,10)

1st AdjacentChannel using

F(50,50)

2nd AdjacentChannel

Less than 3 meters 2 2

0.3

3-Less than 10 meters 2 2

10-Less than 30 meters 2 2

30-Less than 50 meters 4 2

50-Less than 75 meters 9 1.6

75-Less than 100 meters 11 1.7

100-Less than 150 meters 15 1.9

150-Less than 200 meters 17 2

200-250 meters 19 2.1

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Minimum Separation Distance of P/P Mode II WSD to RRBS Station

DBS-01 White Space Database Specification

EHAAT of Mode II WSD

Required Separation from RRBS Base Station Contour(km)

Co-channel using F(50,10)1st Adjacent

Channel

Less than 3 meters 2

0.7

3-Less than 10 meters 2

10-Less than 30 meters 2

30-Less than 50 meters 2

50-Less than 75 meters 2

75-Less than 100 meters 2

100-Less than 150 meters 5

150-Less than 200 meters 7

200-250 meters 9

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White Space Implementation Plan

All licensed LPAs will only have protection from WSDs

Licensed LPAs with fixed locations will be protected for pre-determined periods in the WSDB.

Licensed LPAs not having a fixed location will need to register more precise scheduling information:– Exact location and time(s) of operation with a WSDB

Low-Power Apparatus (LPA) Scheduling Limits/Rules

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Registration facility required to collect location and time-of-use scheduling information for LPA.Location may be a point, radius or polygon.Multiple registrations that specify more than one point in the facility may be entered for very large sites. Ensure that updated licensed LPA scheduling information be exchanged amongst all of the WSDBs.Verify that the LPA is licenced.

LPA Registration

DBS-01 White Space Database Specification

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Separation Distance from WSDs to LPA

DBS-01 White Space Database Specification

White Space Device Type

Required Separation (km)from protected LPA

Co-channel

Personal/portable400 m

400 m

Fixed 1 km

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Channel 37:Radio AstronomyProposing a 2.4 km separation distance away from the centre based on the coordinates – Dominion Radio Astrophysical Observatory (Penticton, B.C.)– Algonquin Provincial Park (ON)

Medical Telemetry

Other Services to Protect

DBS-01 White Space Database Specification

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Verify that the WSD is Industry Canada certified.Provide lists of available channels to certified WSDs. Use encryption to prevent corruption/modification of data between WSDB and WSDs.Ensure data is protected from unauthorized access, input, manipulation, or the deliberate extraction of operational and/or client data.

DBS-01 White Space Database Specification

Security

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Provide fixed and mode II WSDs with channel availability information and included schedule changes for the upcoming 48 hours, upon initial and re-verification of WSD contact.

Provide available channel information to mode II personal/portable WSDs for locations beyond their current position.

– Define a geographic area within which they could operate on the same available channels at all locations.

DBS-01 White Space Database Specification

Database Access Initialization and Re-verification Procedures

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Ensure the synchronization of data of the most current Industry Canada licensing information with other WSDBs every day.Ensure that the scheduling information of licensed LPA is synchronized with the other WSDBs every 15 minutes.

DBS-01 White Space Database Specification

Synchronization

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U.S. broadcasting stations, protected receive sites and LPA are to be protected to the same criteria as specified for Canadian stations above, with the exception that protected contours and/or operational areas will be assumed to stop at the Canada/U.S. border.

DBS-01 White Space Database Specification

Protection of U.S. Stations

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WSDB must retain WSD technical parameters for [X] days for audit purposes in the case of interference reports. This information shall be provided to Industry Canada on formal request of the Department. WSDBs shall delete WSD locations after such time that no interference is reported.

DBS-01 White Space Database Specification

Interference Response

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Any Questions ?

DBS-01 White Space Database Specifications

whitespaceblanc@ic.gc.ca

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