Archived — Interim Arrangement Concerning the Sharing between Canada and the United States of America on Local Multipoint Communication Systems, the Local Multipoint Distribution Service and Certain Other Services in Parts of the Frequency Bands 27.35‑28.35 GHz, 29.1‑29.25 GHz, and 31.0‑31.3 GHz

TRAA
Spectrum Management and Telecommunications Policy
Terrestrial Radiocommunication Agreements and Arrangements

Note

All persons making use of this consolidation are reminded that the documents included herein are provided only for convenience of reference. This consolidation is for the guidance of those engaged in radiocommunications in Canada. The information contained in this document is subject to change without notice. While every reasonable effort has been made to ensure accuracy, no warranty is expressed or implied. For more details, please contact the Spectrum Engineering Branch.

All notes in square brackets [ ] were added for clarification purposes.

Prepared by:

Industry Canada
Radiocommunications and Broadcasting Regulatory Branch
300 Slater Street
Ottawa, Ontario
K1A 0C8

via e-mail: spectrum_pubs@ic.gc.ca

All spectrum publications are available on the Internet at:
http://www.ic.gc.ca/spectrum

Publication Date: March 2001

Confirmation of Acceptance

The attached document is the interim sharing arrangement between the Federal Communications Commission, the National Telecommunications and Information Administration (NTIA) and the Department of Industry (Industry Canada) concerning Local Multipoint Communication systems, the Local Multipoint Distribution Service and certain other services in parts of the 27.35 - 28.35 GHz, 29.1 - 29.25 GHz and 31.0 - 31.3 GHz frequency bands. The Federal Communications Commission, NTIA and Industry Canada intend to implement the attached arrangement, to the extent permissible under their respective domestic laws, pending the amendment of the Agreement Concerning the Coordination and Use of Radio Frequencies Above Thirty Megacycles per Second, with Annex, as amended,Footnote 1 to incorporate the arrangement's terms.

space to insert signature
Donald Abelson
Chief, International Bureau
Federal Communications Commission

Date: December 1, 2000

space to insert signature
William T. Hatch
Associate Administrator
Spectrum Management
National Telecommunications and Information Administration

Date: December 4, 2000

space to insert signature
Michael Binder
Assistant Deputy Minister
Spectrum, Information Technologies & Telecommunications
Industry Canada

Date: December 21, 2000

Footnotes

Footnote 1

Exchange of Notes at Ottawa, Canada, October 24, 1962. Entered into force October 24, 1962. See USA: Treaties and Other International Acts Series (TIAS) 5205; CAN: Canada Treaty Series (CTS) 1962 No. 15. Agreement revision Technical Annex to the Agreement of October 24, 1962 (TIAS 5205/CTS 1962 No. 15) Effected by Exchange of Notes at Ottawa, Canada, June 16 and 24, 1965. Entered into force June 24, 1965. USA: TIAS 5833/CAN: CTS 1962 No. 15, as amended June 24, 1965.

Return to footnote 1 referrer

PDF Readers
top of page

1. Scope

1.1 This interim arrangement (Arrangement) between the Federal Communications Commission (FCC) and the National Telecommunications and Information Administration (NTIA) of the United States of America (U.S.) and the Department of Industry of Canada (Industry Canada), herein referred to as the Agencies, concerns the sharing between Local Multipoint Communication systems (LMCS), the Local Multipoint Distribution Service (LMDS), and certain other services in parts of the 27.35 - 28.35 GHz, 29.1 - 29.25 GHz and 31.0 - 31.3 GHz bands.Footnote 1

1.2 The responsible coordinating agency for the U.S. is NTIA for the 27.35 - 27.5 GHz band and the FCC for all other bands covered by this Arrangement. The responsible coordinating agency for Canada is Industry Canada.

1.3 This Arrangement is subject to review at any time at the request of either Administration.

2. Use of the Bands

2.1 In Canada, the 27.35 - 28.35 GHz (27 GHz) band is designated for LMCS. In the U.S., the 27.35 - 27.5 GHz portion of the band is designated for Federal Government fixed and mobile systems and inter-satellite service and the 27.5 - 28.35 GHz portion is designated for LMDS.

2.2 The 29.1 - 29.25 GHz (29 GHz) band is designated for LMDS in the U.S. and is allocated to fixed and mobile services in Canada.Footnote 2 The 31.0 - 31.3 GHz (31 GHz) band is designated for LMDS and fixed point-to-point microwave systems in the U.S. and is allocated to fixed and mobile services in Canada. As of the date of this Arrangement, Canada had not designated a radio service use for the 29 and 31 GHz bands.Footnote 3 This Arrangement does not apply to mobile services in these bands.

3. General Principles

3.1 The 27 GHz, 29 GHz and 31 GHz bands are to be shared on an equal basis along the border and, to the extent possible, the Administrations shall have full use of these frequencies or sub-bands within their respective countries.

3.2 Licensees are expected to take full advantage of interference mitigation techniques such as antenna discrimination, polarization, frequency offset, shielding, site selection, and/or power control to facilitate the coordination of systems.

3.3 All results of analyses and/or licensee agreements shall be retained by the licensees and be made available to the Agencies upon request.

3.4 If a license is transferred, the sharing agreement(s) (see Section 4) or coordination agreement(s) (see Section 5) developed by the former licensee shall continue to apply with respect to the new licensee until a new agreement is reached.

3.5 The Agencies reserve the right to impose appropriate technical limitations to facilitate reasonable implementation and operation of proposed or existing systems.

top of page

4. Coordination in the 27 GHz Band

4.1 27.5 - 28.35 GHz Band - Coordination of LMDS and LMCS systems in the 27.5-28.35 GHz band shall be carried out by the licensees for the respective service areas on both sides of the border, as indicated in Appendix A. This coordination shall be in accordance with Sections 4.3-4.5.

4.2 27.35 - 27.5 GHz Band - For the purposes of coordinating Canadian LMCS systems and U.S. fixed and mobile systems in the band 27.35-27.5 GHz, the NTIA represents the U.S. fixed and mobile use of this band.Footnote 4 Coordination of U.S. fixed and mobile stations with Canadian LMCS systems shall be carried out by NTIA, and the appropriate LMCS licensee(s), as indicated in Appendix A, through Industry Canada. This coordination shall be in accordance with Sections 4.3-4.5. In addition, fixed stations operating in Canada and the U.S., and U.S. inter-satellite systems, are subject to the technical limits described in Appendix D.

4.3 Cross Border Sharing Agreements - Licensees on both sides of the border are encouraged to develop sharing agreements that will facilitate reasonable and timely development of LMDS and LMCS.Footnote 5 These agreements should allow for the provision of service by each licensee within its licensed service area to the maximum extent possible. If there is a sharing agreement between the licensees, that agreement shall be followed rather than the coordination process set forth in Section 4.4.

4.4 Coordination in the Absence of a Sharing Agreement - If there is no sharing agreement between the licensees, then proposed facilities shall be coordinated on an individual basis according to the process described below.

4.4.1 The following power flux density (pfd) levels from the emissions of each transmitting station shall apply:

4.4.1.a Power flux density A ('pfd A') has a value of -114 dBW/m2 in any 1 MHz band.

4.4.1.b Power flux density B ('pfd B') has a value of -94 dBW/m2 in any 1 MHz band.

4.4.1.c Power flux density is calculated at the service area boundary of the neighboring service area(s) on the other side of the border.Footnote 6 Power flux density is calculated using accepted engineering practices, taking into account such factors as propagation loss, atmospheric loss, curvature of the Earth, and gain of the antenna in the direction of the service area boundary. The pfd level at the service area boundary shall be the maximum value for elevation points up to 500 meters above local terrain elevation. (See Appendix B for a sample calculation of power flux density at the service area boundary.)

4.4.2 If calculations demonstrate that facilities would generate a power flux density less than or equal to pfd A at the applicable service area boundary(ies), then no coordination is required.

4.4.3 If calculations demonstrate that facilities would generate a power flux density greater than pfd A, but less than or equal to pfd B at the applicable service area boundary(ies), then deployment of facilities is subject to successful coordination between the affected licensees in accordance with the following coordination process:Footnote 7

4.4.3.a The licensee must notify the respective licensee(s), by registered mail, of its intention to deploy facilities and include the appropriate information necessary to conduct an interference analysis. If no licensee exists in affected service areas on the other side of the border, deployment may proceed.

4.4.3.b The recipient of the notification must respond within 30 days of receipt to indicate any objection to the deployment. Such objections may be based only on harmful interference to existing systems.Footnote 8

4.4.3.c If there is no objection raised, the deployment may proceed.

4.4.3.d If an objection is raised, the respective licensee(s) must work in collaboration to develop an agreement regarding the proposed facilities before their deployment. It is expected that the time frame to develop such an agreement should not exceed 30 days.

4.4.3.e Proposed facilities must be operational within 6 months from the conclusion of coordination, otherwise coordination must be re-initiated pursuant to Section 4.

4.4.4 If calculations demonstrate that facilities would generate a power flux density greater than pfd B at the applicable service area boundary(ies), then deployment of facilities is subject to the consent of the licensee(s) for that (those) service area(s) on the other side of the border.Footnote 9 If no licensee exists in the affected service area(s) on the other side of the border, deployment of facilities may proceed. In the event that new licensee(s) are authorized in the affected service area(s), the facilities must be modified in a timely manner to meet the pfd B level, unless an agreement can be reached between the affected parties.

4.5 In the event a satisfactory sharing agreement or a successful coordination between the licensees is not reached, then the respective Administrations shall be informed.

5. Coordination in the 29 GHz and 31 GHz Bands

5.1 Each station of fixed systems in Canada and LMDS or fixed systems in the U.S. generating a pfd signal of less than or equal to –105 dBW/m2 in any 1 MHz band at the Canada/U.S. border does not require coordination. Stations with emissions exceeding the pfd value of –105 dBW/m2 in any 1 MHz band at the Canada/U.S. border will require prior coordination before deployment.Footnote 10 For the purposes of coordination with Canada, coordination is to be carried out with Industry Canada.Footnote 11 For the purposes of coordination with the U.S., coordination is to be carried out with the U.S. licensee(s) in the Basic Trading Area(s) (BTA(s))Footnote 12 where the pfd signal exceeds –105 dBW/m2 in any 1 MHz.

5.2 Power flux density is calculated at the Canada/U.S. border.Footnote 13 Power flux density is calculated using accepted engineering practices, taking into account such factors as propagation loss, atmospheric loss, curvature of the Earth, and gain of the antenna in the direction of the Canada/U.S. border. The pfd level at the Canada/U.S. border shall be the maximum value for elevation points up to 500 meters above local terrain elevation. (See Appendix C for a sample calculation of power flux density at the Canada/U.S. border.)

Appendix A

LMCS and LMDS Service Areas

LMCS is licensed by LMCS service areas and LMDS is licensed by Basic Trading Areas (BTAs).Footnote 14 For the purposes of this Arrangement, Tier 3 service areas, instead of LMCS service areas, are used to determine coordination entities in Canada.Footnote 15 The following tables show the Tier 3 service areas and BTAs in the 27.5 - 28.35 GHz frequency band that may need to coordinate with each other. The Administrations will provide licensee names and points of contact to allow the licensees to contact the relevant licensee(s) on the other side of the border to initiate coordination in accordance with this Arrangement. Footnote 16

In the 27.35 - 27.5 GHz frequency range, for purposes of this Arrangement, Tables 1A and 1B will be used to determine coordination entities. The point of contact will be NTIA in the U.S. and Industry Canada in Canada.

Table 1A

U.S. licensees may need to coordinate with the corresponding Canadian Tier 3 service areas indicated below:

BTA Number BTA Name TIER 3 Number TIER 3 Name
14 Anchorage, AK 3-59 Yukon, Northwest Territories & Nunavut/Yukon, Terrtories du Nord-Ouest & Nunavut
30 Bangor, ME 3-09 Quebec
30 Bangor, ME 3-05 Southern New Brunswick/ Nouveau-Brunswick-Sud
30 Bangor, ME 3-06 Western New Brunswick/ Nouveau-Brunswick-Ouest
36 Bellingham, WA 3-51 Okanagan/Columbia
36 Bellingham, WA 3-52 Vancouver
41 Billings, MT 3-42 Moose Jaw
41 Billings, MT 3-41 Regina
60 Buffalo-Niagara Falls, NY 3-30 London/Woodstock/St. Thomas
60 Buffalo-Niagara Falls, NY 3-25 Toronto
60 Buffalo-Niagara Falls, NY 3-29 Niagara-St. Catharines
63 Burlington, VT 3-12 Trois-Rivières
63 Burlington, VT 3-11 Eastern Townships/Cantons de l'Est
63 Burlington, VT 3-13 Montreal
112 Detroit, MI 3-31 Chatham
112 Detroit, MI 3-32 Windsor/Leamington
112 Detroit, MI 3-33 Strathroy
119 Duluth, MN 3-38 Thunder Bay
136 Fairbanks, AK 3-59 Yukon, Northwest Territories & Nunavut/Yukon, Territoires du Nord-Ouest & Nunavut
166 Grand Forks, ND 3-40 Brandon
166 Grand Forks, ND 3-39 Winnipeg
166 Grand Forks, ND 3-38 Thunder Bay
171 Great Falls, MT 3-42 Moose Jaw
171 Great Falls, MT 3-45 Medicine Hat/Brooks
171 Great Falls, MT 3-46 Lethbridge
215 Jamestown, NY-
Warren,
PA-
Dunkirk,
NY
3-30 London/Woodstock/St. Thomas
215 Jamestown, NY-
Warren,
PA-
Dunkirk,
NY
3-29 Niagara-St. Catharines
221 Juneau-Ketchikan, AK 3-57 Prince George
221 Juneau-Ketchikan, AK 3-59 Yukon, Northwest Territories & Nunavut/Yukon, Territories du Nord-Ouest & Nunavut
224 Kalispell, MT 3-46 Lethbridge
224 Kalispell, MT 3-50 Kootenays
251 Lewiston-Auburn, ME 3-11 Eastern Townships/Cantons de l'Est
299 Minot, ND 3-40 Brandon
299 Minot, ND 3-41 Regina
330 Olean, NY-Bradford, PA 3-29 Niagara-St. Catharines
352 Plattsburgh, NY 3-18 Cornwall
352 Plattsburgh, NY 3-11 Eastern Townships/Cantons de l'Est
352 Plattsburgh, NY 3-13 Montreal
356 Port Angeles, WA 3-54 Nanaimo
356 Port Angeles, WA 3-53 Victoria
363 Presque Isle, ME 3-09 Quebec
363 Presque Isle, ME 3-06 Western New Brunswick/ Nouveau-Brunswick-Ouest
363 Presque Isle, ME 3-08 Bas du fleuve/Gaspésie
379 Rochester, NY 3-29 Niagara-St. Catharines
403 Sandusky, OH 3-32 Windsor/Leamington
409 Sault Ste. Marie, MI 3-35 Sault Ste. Marie
413 Seattle-Tacoma, WA 3-51 Okanagan/Columbia
413 Seattle-Tacoma, WA 3-52 Vancouver
413 Seattle-Tacoma, WA 3-53 Victoria
425 Spokane, WA 3-46 Lethbridge
425 Spokane, WA 3-51 Okanagan/Columbia
425 Spokane, WA 3-50 Kootenays
444 Toledo, OH 3-32 Windsor/Leamington
463 Watertown, NY 3-20 Kingston
463 Watertown, NY 3-21 Belleville
463 Watertown, NY 3-15 Ottawa
463 Watertown, NY 3-18 Cornwall
463 Watertown, NY 3-19 Brockville
463 Watertown, NY 3-13 Montreal
465 Waterville-Augusta, ME 3-09 Quebec
465 Waterville-Augusta, ME 3-11 Eastern Townships/Cantons de l'Est
468 Wenatchee, WA 3-51 Okanagan/Columbia
468 Wenatchee, WA 3-52 Vancouver
476 Williston, ND 3-41 Regina
top of page

Table 1B

Canadian licensees may need to coordinate with the corresponding U.S. BTA service areas indicated below:

TIER 3 Number TIER 3 Name BTA Number BTA Name
3-05 Southern New Brunswick/ Nouveau Brunswick-Sud 30 Bangor, ME
3-05 Southern New Brunswick/ Nouveau Brunswick-Sud 363 Presque Isle, ME
3-06 Western New Brunswick/ Nouveau Brunswick-Ouest 30 Bangor, ME
3-06 Western New Brunswick/ Nouveau Brunswick-Ouest 363 Presque Isle, ME
3-07 Eastern New Brunswick/ Nouveau Brunswick-Est 363 Presque Isle, ME
3-08 Bas du fleuve/Gaspésie 363 Presque Isle, ME
3-09 Quebec 30 Bangor, ME
3-09 Quebec 363 Presque Isle, ME
3-09 Quebec 465 Waterville-Augusta, ME
3-11 Eastern Townships/Cantons de l'Est 63 Burlington, VT
3-11 Eastern Townships/Cantons de l'Est 251 Lewiston-Auburn, ME
3-11 Eastern Townships/Cantons de l'Est 352 Plattsburgh, NY
3-11 Eastern Townships/Cantons de l'Est 465 Waterville-Augusta, ME
3-12 Trois-Rivières 63 Burlington, VT
3-13 Montreal 63 Burlington, VT
3-13 Montreal 352 Plattsburgh, NY
3-13 Montreal 463 Watertown, NY
3-15 Ottawa 463 Watertown, NY
3-18 Cornwall 352 Plattsburgh, NY
3-18 Cornwall 463 Watertown, NY
3-19 Brockville 463 Watertown, NY
3-20 Kingston 463 Watertown, NY
3-21 Belleville 463 Watertown, NY
3-25 Toronto 60 Buffalo-Niagara Falls, NY
3-29 Niagara-St. Catharines 60 Buffalo-Niagara Falls, NY
3-29 Niagara-St. Catharines 215 Jamestown, NY-
Warren,
PA-
Dunkirk,
NY
3-29 Niagara-St. Catharines 330 Olean, NY-
Bradford,
PA
3-29 Niagara-St. Catharines 379 Rochester, NY
3-30 London/Woodstock/ St. Thomas 60 Buffalo-Niagara Falls, NY
3-30 London/Woodstock/ St. Thomas 215 Jamestown, NY-
Warren,
PA-
Dunkirk,
NY
3-31 Chatham 112 Detroit, MI
3-32 Windsor/Leamington 112 Detroit, MI
3-32 Windsor/Leamington 403 Sandusky, OH
3-32 Windsor/Leamington 444 Toledo, OH
3-33 Strathroy 112 Detroit, MI
3-35 Sault Ste. Marie 409 Sault Ste. Marie, MI
3-38 Thunder Bay 119 Duluth, MN
3-38 Thunder Bay 166 Grand Forks, ND
3-39 Winnipeg 166 Grand Forks, ND
3-40 Brandon 166 Grand Forks, ND
3-40 Brandon 299 Minot, ND
3-41 Regina 41 Billings, MT
3-41 Regina 299 Minot, ND
3-41 Regina 476 Williston, ND
3-42 Moose Jaw 41 Billings, MT
3-42 Moose Jaw 171 Great Falls, MT
3-45 Medicine Hat/Brooks 171 Great Falls, MT
3-46 Lethbridge 171 Great Falls, MT
3-46 Lethbridge 224 Kalispell, MT
3-50 Kootenays 224 Kalispell, MT
3-50 Kootenays 425 Spokane, WA
3-51 Okanagan/Columbia 36 Bellingham, WA
3-51 Okanagan/Columbia 425 Spokane, WA
3-51 Okanagan/Columbia 468 Wenatchee, WA
3-52 Vancouver 36 Bellingham, WA
3-52 Vancouver 413 Seattle-Tacoma, WA
3-52 Vancouver 468 Wenatchee, WA
3-53 Victoria 36 Bellingham, WA
3-53 Victoria 356 Port Angeles, WA
3-53 Victoria 413 Seattle-Tacoma, WA
3-54 Nanaimo 356 Port Angeles, WA
3-57 Prince George 221 Juneau-Ketchikan, AK
3-59 Yukon, Northwest Territories & Nunavut/ Yukon, Territories du Nord-Ouest & Nunavut 14 Anchorage, AK
3-59 Yukon, Northwest Territories & Nunavut/ Yukon, Territories du Nord-Ouest & Nunavut 136 Fairbanks, AK
3-59 Yukon, Northwest Territories & Nunavut/ Yukon, Territories du Nord-Ouest & Nunavut 221 Juneau-Ketchikan, AK
top of page

Appendix B - Sample Calculation for the 27 GHz Band

The following example is provided to illustrate how the pfd level at the service area boundary can be determinedFootnote 17:

Proposed station parameters:

Parameter Symbol Value
Hub transmitter power into the antenna PT -12 dBW
Channel bandwidth B 40 MHz
Transmitter antenna height above ground HT 100 meter
Transmitter antenna gain (Maximum gain towards the service area boundary at any elevation point 0-500 m above local terrain) GT 21 dBi
Centre frequency of channel F 28 150 MHz
Distance from hub transmitter to the boundary of service area Y D 10 km

Figure 1. Graphical representation of the proposed situation

The spectral power density in dBW/MHz received by an isotropic antenna (Pat the boundary of Service Area Y) at the boundary of service area Y may be calculated using free space propagation, and taking into account such factor as atmospheric losses as follows:

Pat the boundary of Service Area Y
= PT'+ GT - 20 log FMHz - 20 log Dkm - 32.4 - La
= (-28 + 21 - 20log(28 150) - 20 log(10) - 32.4 - 0.1x10) dBW/MHz
= (-28 + 21 - 89 - 20 - 32.4 - 1) dBW/MHz
= -149.4 dBW/MHz
where: PT'
= PT - 10 log BMHz
= -12 - 10 log(40)
= -28 dBW/MHz
GT
FMHz
Dkm
La
= 21 dBi
= 28 150
= 10
= atmospheric losses
= 0.1 dB/km

Then, the power flux density in dBW/m2 in 1 MHz (pfd) may be calculated as follows:

pfd
= Pat the boundary of Service Area Y - 10 log Ar
= (-149.4 - 10 log(9.038 x 10-6)) dBW/m2 in 1 MHz
= (-149.4 - (-50.4)) dBW/m2 in 1 MHz
= -99 dBW/m2 in 1 MHz
where: Ar 
= area of an isotropic receiving antenna
= λ2/(4π)
= c2/(4πFHz2)
= (3x108)2/(4π x (28.15x109)2)
= 9.038 x 10-6m2

Appendix C - Sample Calculation for the 29 GHz and 31 GHz Bands

The following example is provided to illustrate how the pfd level at the Canada/U.S. border can be determinedFootnote 18:

Proposed station parameters:

Parameter Symbol Value
Hub transmitter power into the antenna PT -12 dBW
Channel bandwidth B 40 MHz
Transmitter antenna height above ground HT 100 meter
Transmitter antenna gain (Maximum gain towards the U.S./Canada border at any elevation point 0-500 m above local terrain) GT 21 dBi
Centre frequency of channel F 29 150 MHz
Distance from hub transmitter to the Canada/U.S. border D 10 km

Figure 1. Graphical representation of the proposed situation

The spectral power density in dBW/MHz received by an isotropic antenna (Pat the U.S./Canada border) at the U.S. Canada border may be calculated using free space propagation, and taking into account such factor as atmospheric losses as follows:

Pat the U.S./Canada border
= PT'+ GT - 20 log FMHz - 20 log Dkm - 32.4 - La
= (-28 + 21 - 20 log(29 150) - 20 log(10) - 32.4 - 0.1x10) dBW/MHz
= (-28 + 21 - 89.3 - 20 - 32.4 - 1) dBW/MHz
= -149.7 dBW/MHz
where: PT'
= PT - 10 log BMHz
= -12 - 10 log(40)
= -28 dBW/MHz
GT
FMHz
Dkm
La
= 21 dBi
= 29 150
= 10
= atmospheric losses
= 0.1 dB/km

Then, the power flux density in dBW/m2 in 1 MHz (pfd) may be calculated as follows:

pfd
= Pat the U.S./Canada border - 10 log Ar
= (-149.7 - 10 log(8.429 x 10-6)) dBW/m2 in 1 MHz
= (-149.7 - (-50.7)) dBW/m2 in 1 MHz
= -99 dBW/m2 in 1 MHz
where: Ar
= area of an isotropic receiving antenna
= λ2/(4π)
= c2/(4πFHz2)
= (3x108)2/(4π x (29.15x109)2)
= 8.429 x 10-6m2
top of page

Appendix D

The following technical limits have been developed in the ITU-R with the objective to provide adequate protection to the inter-satellite service from emissions from the fixed service in the band 27.35-27.5 GHz:

Stations of the inter-satellite service will operate in accordance with the provisions of Section V of Article S21 of the ITU Radio Regulations.

1. Transmitters of a hub station in a point-to-multipoint network:

1.1 The equivalent isotropic radiated power (e.i.r.p) spectral density for each transmitter of a hub station in a point-to-multipoint network will not exceed the following values in any 1 MHz band for the elevation angle q above the local horizontal planeFootnote 19:

+14 dB
dBW
for 0° ≤ θ ≤ 5°
+14-10log(θ/5)
dBW
for 5° < θ ≤ 90°

1.2 In the direction toward the geostationary (GSO) Data Relay Satellite (DRS) orbit locations of, 41°W, 46°W, 171°W, and 174°WFootnote 20, the e.i.r.p. spectral densityFootnote 21 of the emissions of a hub station shall not exceed +8dBW/MHz if the elevation angle above the local horizontal planeFootnote 22 is between 0° and 20°.

1.3 In the case of a hub-station employing single frequency operation in which the same frequency is used for both transmission and reception on a time division basis, the e.i.r.p. spectral density limit in 1.2 can be relaxed by 7 log (1/η) dB, where η (0< η <1) is the proportion of time when a hub-station is emitting transmitting signals. However, this relaxation should not exceed 3 dB even for a small η.

1.4 The hub station of a point-to-multipoint network may use Automatic Transmit Power Control (ATPC) to increase its transmitted power during rain faded condition, by an amount not exceeding the precipitation attenuation such that its e.i.r.p. spectral density in the direction of any GSO DRS orbit locations referenced above does not exceed +17 dBW in any 1 MHz band.

2. Transmitter of a subscriber station in a point-to-multipoint network, or transmitters of point-to-point fixed stations:

For the GSO DRS orbit locations referenced above:

2.1 As far as practicable, the e.i.r.p. spectral density of such a fixed service (FS) station in the direction of the above locations should not exceed +24dBW in any 1 MHz band.

2.2 During conditions when precipitation attenuation is experienced between the FS transmitting and receiving stations, the transmitting station may use ATPC to increase its transmitted power, by an amount not exceeding the precipitation attenuation such that its e.i.r.p. spectral density in the direction of the GSO locations referenced above does not exceed +33 dBW in any 1 MHz band.

2.3 When the atmospheric attenuation towards the GSO locations referenced above, calculated using the procedures in Annex 1 of Recommendation ITU-R P.676, taking into account the elevation angle towards these orbit locations, the altitude of the FS transmitting antenna and local information of average water vapor content in the driest month and of other meteorological parameters (see Annex 3 to Recommendation ITU-R F. 1249), exceeds 3 dB, this excess may be applied as an increase of the e.i.r.p. spectral density of the subscriber or point-to-point station.

2.4 When the Fresnel zones on the path from such a transmitting subscriber station or point-to-point station in the direction of the above orbit locations are completely or partially blocked, the e.i.r.p. density in this direction may be increased by an amount calculated using the methods of Recommendation ITU-R P.526 (see Annex 4 to Recommendation ITU-R F.1249) taking due account of atmospheric refraction on this path (see Recommendation ITU-R F.1333).


Return to footnote reference 1 This Arrangement applies to both new facilities and facilities in existence prior to the date of this Arrangement.

Return to footnote reference 2 The 29 GHz band is also designated for Non-Geostationary Orbit Mobile Satellite Service (NGSO MSS) feeder link systems in both the U.S. and Canada. This Arrangement does not apply to coordination with satellite systems in this band.

Return to footnote reference 3 This arrangement may be amended if Canada designates the 29 and 31 GHz bands for fixed service.

Return to footnote reference 4 The service area boundary for fixed and mobile applications operating in the U.S. in this band is defined as the U.S./Canada border.

Return to footnote reference 5 LMDS and LMCS systems can consist of one or more facilities, which may be implemented at different times. Sharing agreements can facilitate the implementation of such systems by allowing the licensees to establish how they will share in advance.

Return to footnote reference 6 In cases where both the U.S./Canada border and the neighboring service area lie within a body of water, the power flux density shall be calculated at the shoreline of the neighboring service area.

Return to footnote reference 7 The pfd B level has been selected on the basis that new systems, on the other side of the border, can be implemented with certain mitigation measures to avoid potential interference. It should be noted that potential interference into existing stations is a possibility, and therefore coordination is required.

Return to footnote reference 8 Existing systems include (1) systems that are operational prior to the date on which notification is received and (2) systems that have been successfully coordinated within the 6 months preceding that date.

Return to footnote reference 9 Any pfd value greater than pfd B may present potential interference into both existing, and/or planned systems, therefore successful coordination is required before deployment.

Return to footnote reference 10 Licensees on both sides of the border should recognize that the pfd level of –105 dBW/m2 in any 1 MHz band at the Canada/U.S. border is 10 dB higher than the value given in Section 4 for the 27 GHz band. Operators should take this into consideration in their system design to avoid any interference problems. Emissions of up to the –105 dBW/m2 in any 1 MHz band at the Canada/U.S. border will not be considered as interference.

Return to footnote reference 11 For the purposes of coordination with Canada, licensees should contact the Director, Space & International Regulatory Activities, Industry Canada.

Return to footnote reference 12 See Appendix A, note 14.

Return to footnote reference 13 In cases where both the U.S./Canada border and the neighboring service area lie within a body of water, the power flux density shall be calculated at the shoreline of the neighboring service area.

Return to footnote reference 14 BTAs are defined in the Rand McNally 1992 Commercial Atlas & Marketing Guide, 123rd Edition, at pages 38-39, which identifies 487 BTAs based on the 50 States. Further information on U.S. service areas and licensees is available at http://www.fcc.gov/wtb/uls.

Return to footnote reference 15 The Tier 3 service areas are described in the document, Service Areas for Competitive Licensing (Industry Canada, August 1998). LMCS Service areas are described in the document, Local Multipoint Communication Systems (LMCS) in the 28 GHz Range: Policy, Authorization Procedures and Evaluation Criteria. These service areas and Canadian licensee information are available on the World Wide Web by following the appropriate links at: http://www.ic.gc.ca/spectrum.

Return to footnote reference 16 See supra notes 14-15.

Return to footnote reference 17 It should be noted that the example calculation assumes line of sight conditions due to the short path length and the height of the transmitting antenna. In other cases, where the distance is larger and/or the transmitting antenna height is small, line-of-sight conditions may not exist. In these cases, an appropriate propagation model that takes the non-line-of-sight situation into account should be used.

Return to footnote reference 18 It should be noted that the example calculation assumes line of sight conditions due to the short path length and the height of the transmitting antenna. In other cases, where the distance is larger and/or the transmitting antenna height is small, line-of-sight conditions may not exist. In these cases, an appropriate propagation model that takes the non-line-of-sight situation into account should be used.

Return to footnote reference 19 At elevation angles below the local horizontal plane no e.i.r.p. limitations, other than those specified in Article S21 of the ITU Radio Regulations apply.

Return to footnote reference 20 In the event that additional orbit locations are identified in applicable ITU-R Recommendations, this arrangement may be modified to include those orbit locations.

Return to footnote reference 21 The e.i.r.p. spectral density radiated towards a geostationary DRS location shall be calculated as the product of the transmitted power spectral density and the gain of the omnidirectional or sectoral antenna in the direction of the DRS. In the absence of a radiation pattern for the hub-station antenna, the reference radiation pattern of Recommendation ITU-R F.1336 should be used. The calculation should take into account the effects of atmospheric refraction and the local horizon. A method for calculating the separation angles is given in Annex 2 to Recommendation ITU-R F.[PMP26GHz].

Return to footnote reference 22 At elevation angles below the local horizontal plane no e.i.r.p. limitations, other than those specified in Article S21 of the ITU Radio Regulations apply.

Date modified: