Shared Spectrum Framework for Community Networks for Kenya online discussion

Hi Mwendwa

Everything has gone silent, even though this is a controversial topic!

Maybe I can stir up some debate…

Firstly, it would be helpful to clarify what the problem is before trying to identify the solution. For example, is it a lack of spectrum or is it the cost of spectrum or is it something else? Actually there is quite a lot of spectrum available in Kenya that is completely un-used (for example, in 700 Mhz band that is good for rural areas) and some that is so under-used (by some ISPs and some government users) that the best thing to do would be to return it to the CA and let the CA license it to someone else to use. [In relation to the Spectrum Fees Topic] Certainly the cost of that spectrum is a challenge for many, and it is very commendable that the CA proposes to Review spectrum fee framework recognising the need for significantly reduced fees for underserved/rural areas. I fully support this and it should be applicable to ALL spectrum license holders to encourage as many as possible to connect more unconnected areas. Fees can help work out who to allocate spectrum to that is serious about using it, but it also adds major costs. There are multiple fees at the moment, not just for spectrum licenses but also per base station using it, and even for using spectrum for backhaul to base stations.

Secondly, it is important to understand that connectivity relies on infrastructure investments, the business case for which need some predictability. One cannot build a network (whether a community network or a “regular” ISP) without some guarantee that the infrastructure will still be usable for 5 years or 10 years etc. Also, it is critical to avoid different providers using the same spectrum too close to each other that it causes interference. These kind of issues are what makes shared spectrum tricky. When does one decide the spectrum is not being used in a location and let someone else use it compared to recognizing the license holder just has not yet got around to building in that location but will do “soon”? Leasing spectrum from a license holder could be a viable option (i.e. that license holder agrees to let someone else the their spectrum in a particular location for a fee and for a determined time). [In relation to IMT spectrum topic]

In relation to this a critical issue with investment in infrastructure and having predictability is the issue of wanting to change a spectrum usage after equipment has been invested in. Let me give 2 example:

1) TV White Space regulations have been available in some countries (e.g. US, UK) for many years but have had very little adoption. Meanwhile some of those frequencies have been used for regular mobile use, e.g. 600 Mhz network in the US and achieved wide scale and are particularly useful for rural coverage. What if equipment is deployed to use TVWS in this frequency but gets little adoption so the CA wants to change to mobile use; what to do with the existing equipment? How to avoid interference with the new equipment? [In relation to dynamic spectrum access topic]. Since there is plenty of spectrum available in Kenya, just some is not well used and could be taken back/re-distributed and some is too expensive, there may not be a huge need for TVWS, but if ISPs can get it to work with the geolocation databases, and if they can get good enough Quality and Speeds, they could try.

2) Use of equipment in unlicensed spectrum – once it is in use in the market then it cannot be taken out of the market and new equipment brought in. With licensed spectrum it is easier to manage. So for example as countries weight up spectrum for wi-fi vs 5G, if later there is more demand for 5G, it will not be possible to remove wi-fi equipment since there is no record of who owns it.

Third, it is important to recognize the need and benefits from economies of scale. Nationwide providers get this from non-infrastructure based operations (e.g. creating an organization with administration functions, customer service functions, core network, billing systems etc) and they also get this from having common infrastructure. This is a challenge for localized spectrum access [in regards the IMT spectrum topic].

[on the license exempt spectrum] It is clear that in Kenya the majority of people use mobile for their access (from a base station that is using either microwave or fiber) or they are using wi-fi for their access (from a mobile router or a home fiber router). Most ISPs that provide wi-fi networks also use fiber as their backhaul. In the future more and more people may be able to use both mobile routers (5G capacity) or home fiber routers (fiber). In fact there is need for more spectrum for mobile, as more and more people will use 4G and 5G mobile routers to give them wi-fi at home especially in rural or less dense places where fiber may be expensive. In these cases there is no need for more spectrum for wi-fi. Wi-fi provides only short-range internet and is easily blocked by walls, and with 7+ Gbps capacity that is more than enough for the small number of users for each access point (It can get 7Gbps because it already has 560 Mhz of spectrum, way more than mobile) whereas each mobile base station will support thousands of users. Mobile base stations cannot work with unlicensed spectrum.

Also [on license exempt spectrum], it is noted that in the CA document that there is frequent interference for those using it for backhaul. This is an inevitable problem with unlicensed spectrum which causes quality issues, making it unsuitable for large scale deployments of backhaul in dense populations (with other users of wi-fi for personal use as well as use for backhaul intefering).

I know this can get quite technical, but I hope that some of this information may be useful. Note some comments I have made are simplified/generalized to try to be brief and not too technical.

From: kictanet [mailto:[email protected]] On Behalf Of Mwendwa Kivuva via kictanet
Sent: Friday, May 28, 2021 12:20 PM
To: Adam Lane <[email protected]>
Cc: Mwendwa Kivuva <[email protected]>
Subject: [kictanet] Shared Spectrum Framework for Community Networks for Kenya online discussion

Dear Listers,

The tread on Licensing framework is on fire and doing very well. Thank you all for the contributions, reading, learning, relearning … Please continue debating on that thread.

We will start a new thread on the proposed “Shared Spectrum Framework”. The Licensing and Shared Spectrum Framework for Community Networks for Kenya that was issued by the Communications Authority of Kenya, available for direct download here<>.

License Exempt Spectrum

WiFi has emerged as a powerful technology for both access and backhaul around the world but regulation has not fully kept up with the backhaul developments.

The draft framework recommends:

· Review the Guidelines on the use of Radiofrequency Spectrum by Short Range Devices to amend EIRP limits for 2.4 GHz & 5 GHz Wi-Fi for Point-to-Point and Point-to-Multipoint use.

· Review options for lowering the barrier to use of other license-exempt bands for PtP and PtMP use, including 24 GHz and 60 GHz.

· Expand the range of frequencies available for license-exempt use, especially in the 5 & 6 GHz range

· To strengthen collaborations with service providers to foster standards and regulatory inclusion.

Dynamic Spectrum Access

· To expedite the commercial availability of geolocation database service and implement required mechanisms to make the TVWS spectrum available immediately to operators.

· To establish an incubatory period for TVWS technologies.

· To evaluate with regional regulators the feasibility of a common approach implementation of geolocation databases

IMT Spectrum

· Establish a regulatory sandbox for localised spectrum access for small operators in an unassigned LTE band.

· Conduct a review of international approaches to the creation of more localised access to spectrum to inform the establishment of a more permanent mechanism for local spectrum access that is well adapted to the Kenyan context.

Spectrum Fees

· Review spectrum fee framework recognising the need for significantly reduced fees for underserved/rural areas.

· Consider a spectrum fee reduction scheme for non-profit community networks.


· What are your comments on the proposed recommendations?

· What in your opinion are the most important considerations the proposed shared spectrum framework should address?

· Are there gaps you have identified in the existing licensing framework in respect to spectrum assignment and utilization?

· How would you recommend CA to address the identified gaps?
Mwendwa Kivuva, Nairobi, Kenya

kictanet mailing list

KICTANet Admin information

Related Posts

Submit a Comment

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.