Interim Arrangement Concerning the Sharing between Canada and the United States of America - Frequency Bands 27.35‑28.35 GHz, 29.1‑29.25 GHz, and 31.0‑31.3 GHz

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

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:

Table 1B

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

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 determined^{Footnote 17}:

Proposed station parameters:

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:

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

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 determined^{Footnote 18}:

Proposed station parameters:

The spectral power density in dBW/MHz received by an isotropic antenna (P_{at 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:

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

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:

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:

^{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, 123^rd 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.