Update on Industry Canada’s White Space Database
Specification (DBS-01)
Joint Industry Canada/RABC
Stakeholder Discussion - Ottawa, ON
May 14th 2013
DBS-01 White Space Database Specification
Intent
Sets the minimum technical requirements for
the designation of a database capable of
indicating available channels for use by white
space devices (WSDs)
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DBS-01 White Space Database Specification
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
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DBS-01 White Space Database Specification
White Space Frequency Bands
Frequency Bands
(MHz)
TV Channels
Personal/Portable
WSD
54-60
2
-
60-72
3-4
76-88
5-6
-
174-216
7-13
-
470-512
14-20
-
512-608
21-36
608-614
37
614-698
38-51
Fixed
WSD
[Note 1]
[Note 2]
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.
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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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DBS-01 White Space Database Specification
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
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DBS-01 White Space Database Specification
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
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DBS-01 White Space Database Specification
Broadcast TV Protected Contours
Type of TV station
Analog (full and low power)
TV Channel
Thresholds for
Broadcast TV
Protected Contour
(dBµV/m)
Propagation Curve
Low VHF (Ch. 2-6)
47
F(50,50)
High VHF (Ch. 7-13)
56
F(50,50)
64-20log(615/F)
F(50,50)
Low VHF (Ch. 2-6)
28
F(50,90)
High VHF (Ch. 7-13)
36
F(50,90)
41-20log(615/F) [Note 5]
F(50,90)
Low VHF (Ch. 2-6)
43
F(50,90)
High VHF (Ch. 7-13)
48
F(50,90)
51-20log(615/F) [Note 5]
F(50,90)
UHF (Ch. 14-51)
Digital (full power)
UHF (Ch. 14-51)
Digital (low power)
UHF (Ch. 14-51)
Note: Refer to BPR-10 for DTV and BPR-4 for Analogue TV
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DBS-01 White Space Database Specification
TV Protection Contour Example
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DBS-01 White Space Database Specification
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.
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DBS-01 White Space Database Specification
Sample of the Minimum Separation Distances from
Fixed WSD to Broadcast TV Contours
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DBS-01 White Space Database Specification
Sample of the Minimum Separation Distances from
Mode II P/P to Broadcast TV Contours
* 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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DBS-01 White Space Database Specification
Remote Rural Broadband Systems (RRBS)
Protection
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.
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DBS-01 White Space Database Specification
Remote Rural Broadband Systems (RRBS)
Protection Criteria
Channel
RRBS Station Protection
Criteria
(dBµV/m)
Co-Channel
37.8
1st Adjacent
69.0
2nd Adjacent
91.6
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DBS-01 White Space Database Specification
Minimum Separation Distance of Fixed
WSD to RRBS Station
Required Separation from RRBS Base Station Contour
(km)
EHAAT of Fixed WSD
Co-channel
using F(50,10)
1st Adjacent
Channel using
F(50,50)
Less than 3 meters
2
2
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
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1.6
75-Less than 100 meters
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1.7
100-Less than 150 meters
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1.9
150-Less than 200 meters
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2
200-250 meters
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2.1
2nd Adjacent
Channel
0.3
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DBS-01 White Space Database Specification
Minimum Separation Distance of P/P Mode
II WSD to RRBS Station
EHAAT of Mode II
WSD
Required Separation from RRBS Base Station Contour
(km)
Co-channel using F(50,10)
Less than 3 meters
2
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
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1st Adjacent
Channel
0.7
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White Space Implementation Plan
Low-Power Apparatus (LPA)
Scheduling Limits/Rules
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
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DBS-01 White Space Database Specification
LPA Registration
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.
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DBS-01 White Space Database Specification
Separation Distance from WSDs to LPA
White Space Device Type
Required Separation (km)
from protected LPA
Co-channel
Personal/portable
Fixed
400 m
400 m
1 km
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DBS-01 White Space Database Specification
Other Services to Protect
Channel 37:
Radio Astronomy
Proposing 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
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DBS-01 White Space Database Specification
Security
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.
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DBS-01 White Space Database Specification
Database Access Initialization and
Re-verification Procedures
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.
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DBS-01 White Space Database Specification
Synchronization
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.
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DBS-01 White Space Database Specification
Protection of U.S. Stations
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.
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DBS-01 White Space Database Specification
Interference Response
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.
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DBS-01 White Space Database Specifications
Any Questions ?
whitespaceblanc@ic.gc.ca
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