Want some 6 GHz with your Poutine?
In days of past, Canada demonstrated leadership to the world in the culinary arts when it was first to combine French fries, gravy, and cheese curds – making the classic dish, “Poutine”! Once again, Canada has flexed its leadership muscles to approve license-exempt use of the 6 GHz band. On May 19th, 2021, the Department of Industry, Science and Economic Development Canada (ISED) released their “Decision on the Technical and Policy Framework for License-Except Use in the 6 GHz Band”. This decision was based on feedback collected through a consultation process undertaken in Canada Gazette notice SMSE-014-20, Consultation on the Technical and Policy Framework for License-Except Use in the 6 GHz Band. Highlights from the decision can be found in the ISED announcement to triple Wi-Fi spectrum available for Wi-Finews release.
In a nutshell, this decision and the documentation behind it set out the technical and policy framework for use of the 5925 – 7125 MHz frequency band (the 6 GHz band). This decision places Canada on the list of over 30 countries who have adopted or are evaluating a 6 GHz policy. For reference, the WI-Fi Alliance maintains a list of countries considering or adopting the 6 GHz band for Wi-Fi.
Political & Economic Details
ISED’s objectives for license-exempt use of the 6 GHz band in Canada are to:
- Foster innovation and investment in new wireless technologies and services
- Support greater choice and affordability of wireless services for consumers and businesses
- Facilitate deployment and timely availability
The Honourable François-Phillipe Champagne, Minister of Innovation, Science and Industry, announced this decision would deliver on a priority to improve Wi-Fi speeds for Canadians. Minister Champagne stated tripling the spectrum available will make it easier for Canadian consumers to connect to Wi-Fi for accessing school, work, and health care from home.
“High-quality and affordable wireless services have never been more important in the everyday lives of Canadians. That’s why we’re making more spectrum available to support greater choice and affordability of wireless broadband. This decision will make staying connected easier for Canadians who rely on their Wi-Fi for accessing school, work and health care from home.”The Honourable François-Philippe Champagne, Minister of Innovation, Science and Industry
The focus of the tweet and text in the image suggest faster Wi-Fi is the priority, but fall short of emphasizing another two key goals wrapped up in this decision. Fast Wi-Fi is great at the edge, but the Internet connection often becomes the bottleneck, especially in remote areas as showcased in the image above. Fortunately, this decision also provides technical and policy guidelines for fixed broadband wireless services delivered by local and regional operators. This is big boost to allow these smaller operators to remain competitive and offer better services to their customers. This brings us to the last goal in this decision with the ultimate target of cost savings that can be passed on to consumers in the form of lower prices.
Lower prices…? Time will tell if this results in actual lower prices and curves the graph in the data below (source: Price Comparisons of Wireless, Wireless and Internet Services in Canada and with Foreign Jurisdictions: 2020 Edition)
Now with the OSI layer 8 and 9 details out of the way, let’s explore the technical components of the 6 GHz band. As mentioned earlier, the 6 GHz band decision covers 1200 MHz of spectrum, meaning while it is referred to as the 6 GHz band, it actually encompasses frequencies ranging between 5925 – 7125 MHz. Adding 1200 MHz of spectrum triples the already allocated mid-band spectrum in 2.4 GHz (2400 – 2483.5 MHz) and 5 GHz (5150 – 5850 MHz).
To provide some context, here is a simple list revealing an increase in available 20 MHz wide channels for Wi-Fi available in Canada:
- 3 x 20 MHz channels @ 2.4 GHz
- 22 x 20 MHz channels @ 5 GHz
- 59 x 20 MHz channels @ 6 GHz
6 GHz Decision Highlights
D1 – ISED will allow licence-exempt RLAN use in the 5925-7125 MHz band.
D2 – ISED will update the CTFA as shown in table 1 by adding footnote Cxx.
D3 – Standard-power RLANs under the control of an AFC system will be permitted to operate on a licence-exempt basis in the 5925-6875 MHz frequency range.
D4 – Low-power indoor-only RLANs will be permitted to operate on a licence-exempt basis across the 5925-7125 MHz band with the use of a contention-based protocol (e.g. listen-before-talk).
D5 – Indoor and outdoor very low-power RLAN devices will be permitted to operate on a licence-exempt basis across the 5925-7125 MHz band with the use of a contention-based protocol (e.g. listen-before-talk).
D6 – ISED will adopt an AFC system that is practical, consistent with the Canadian public interest and harmonized with the U.S. to the maximum extent possible.
D7 – Canadian AFC rules will include a requirement to protect licensed fixed service systems and radioastronomy sites.
Many of the decisions revolve around power levels for specific operation in defined situations, which basically boils down to:
- Standard-power RLANs (both indoor and outdoor) with automated frequency coordination
- Low-power indoor-only RLANs without AFC control
- Very low-power RLANs (both indoor and outdoor) without AFC control
Operation levels defined by ISED are compared against the FCC’s decisions in the two images below:
AFC (Automated Frequency Coordination)
AFC (Automated Frequency Coordination) is a centralized process by which APs must request a list of available channels from an AFC operator within a certain period of time. (FCC uses 24 hours, but ISED suggests at least a daily basis). AFC certified access points must be capable of determining their geolocation. They (or the wireless controller) are provided channel availability lists by the AFC operator based on uploaded geolocation information.
ISED intends to develop the specific rules and standards for operation of this centralized AFC system. In the meantime, ISED indicated it will monitor developments and make any modifications and improvements driven by evolution of the AFC system architecture. ISED will not be adopting an aggregate emissions approach due to the resulting complexity in AFC implementation which could deter AFC system administrators (AFCSAs) from operating in Canada. Lastly, ISED also opted not to define a specific protocol for AFC communication, rather allowing the protocols to be sorted over time.
On a side note: This reminds me of an old programmer I knew who only listened to music through a 30-year filter letting time filter the noise from the greatest hits. He let others decide what songs provided value and then adopted those songs into his playlist minimizing the time he spent listening to noise.
Any decisions that were not finalized were addressed by stating they will be harmonized with other regulatory bodies.
Also, if you haven’t tried poutine, I highly recommend it!!!