SAB-001-13 — Public Safety Operations in the Band 775‑776 MHz

October 2013

Posted on Industry Canada website: October 4, 2013

In the revisions to the Standard Radio System Plan 511 (SRSP-511) for the bands 768-776 MHz and 798-806 MHz, released April 2010 (Issue 2), Industry Canada indicated that the band 775-776 MHz is to be used on the basis of a single (simplex) channelling plan. It further stated that until decisions are made for the adjacent spectrum, assignments be limited in the band 775-776 MHz due to the potential for interference from adjacent mobile broadband commercial services.

In March 2012, Industry Canada released SMSE-002-12, Policy and Technical Framework — Mobile Broadband Services (MBS) – 700 MHz Band - Broadband Radio Service (BRS) – 2500 MHz Band, in which the following band plan was adopted for the Upper 700 MHz band.

Figure 1 — Canadian Upper 700 MHz Band Plan
Canadian Upper 700 MHz Band Plan (the long description is located below the image)

Image Description

This chart shows the general band plan for the Upper 700 MHz band, also known as the band 746-806 MHz. The Upper 700 MHz band includes the paired commercial block C1 that consists of the bands 746-751 MHz and 776-781 MHz, the paired commercial block C2 that consists of the bands 751-756 MHz and 781-786 MHz, the paired PSBB block that consists of the bands 763-768 MHz and 793-798 MHz, the paired D block that consists of the bands 758-763 MHz and 788-793 MHz, and the paired PS NB/WB block that consists of the bands 768-776 MHz and 798-806 MHz. The Upper 700 MHz band also includes two 1 MHz blocks (the bands 756-757 MHz and 776-777 MHz) that are being held in reserve for future consideration, as well as two 1 MHz guardbands (the bands 757-758 MHz and 787-788 MHz).

Two Industry Canada documents, Radio Standards Specification 130 (RSS-130) and SRSP-518, were developed and published to address the technical requirements for commercial mobile broadband equipment operating in the bands 698-756 MHz and 777-787 MHz.

In the United States, the band edge for the 700 MHz public safety narrowband equipment is 775 MHz instead of 776 MHz. Given the potential for interference to public safety communications, the United States has established rules for commercial mobile broadband equipment, which include an out-of-band (OOB) emission limit to reduce the risks of interference to public safety stations operating in the bands 763-775 MHz and 793-806 MHz. This OOB emission limit is also supported by the 3GPP specifications and by existing commercial mobile broadband equipment.

The transmitter unwanted emission limits — as defined in Industry Canada’s Radio Standards Specification RSS-130, Mobile Broadband Service (MBS) Equipment Operating in the Frequency Bands 698-756 MHz and 777-787 MHz, — are harmonized with the OOB emission limits found in the United States’ rules. Unless 3GPP specifications are changed, public safety stations operating in the band 775-776 MHz will likely receive higher levels of OOB emissions from commercial mobile broadband stations than from narrowband public safety stations operating below 775 MHz. Furthermore, commercial equipment availability in Canada could be affected if a more stringent unwanted emission limit was mandated for the band 775-776 MHz.

Consequently, in Canada, public safety stations deployed in the band 775-776 MHz may experience an increased level of interference from commercial mobile broadband operations. Although licensed public safety mobile systems will be protected from each other, public safety stations deployed in the band 775-776 MHz will not be protected from mobile broadband systems operating in conformance with the transmitter unwanted emission limits defined in RSS-130 in the band 777-787 MHz.

Given the facts that a very limited number of public safety narrowband stations are currently deployed in the band 775-776 MHz and that commercial mobile broadband stations have not been deployed in the 700 MHz band yet, this decision will have little impact on existing operations.

Industry Canada will review and update SRSP-511 accordingly.

Issued under the authority
of the Radiocommunication Act

space to insert signature

Marc Dupuis
Director General
Engineering, Planning and Standards Branch

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