North Queens TV White Space Trial

       Technologies Compared

                   

                           

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Technologies Compared

MTRI Demonstration Link this is using the latest generation of equipment

Pretty Mary Lake link an example of how we could bring service into a remote community

 

 

 

These are computer simulations of coverage from our first test site of various technologies and take into account terrain and tree coverage. The red circle is a 5km radius from the test site and the blue 10km

 

 

 

3.65GHZ Technology

This is currently the best performing high frequency technology with very limited non line of site performance.

Access point throughput is typically over 100Mbps when a clear line of site is available but rapidly falls with the presence of a few trees.

 

900Mhz Technology

This is currently the best performing non line of site option available to wireless internet service providers.

It is currently being used to provide rural internet service in Nova Scotia by Eastlink and Seaside Communications as such the spectrum is heavily used and although they donít have exclusive rights to it additional use of the spectrum is likely to pose technical problems.

Current Canopy equipment only provides a throughput of 3.5Mbps per access point with up to 6 access points being possible per tower.

This equipment could be upgrade to improve the performance by a factor of ~3 but very little has been.

 

 

 

TVWS Technology

This has considerably improved performance in tree cover and even has the ability to overcome some solid objects such as small hills.

Current Canadian regulations limit us to one 6Mhz channel which limits our access point throughput to 13Mbps TCP.

Canadian regulations are currently under review if we adopt the practises of other countries we should be allow to use more channels in which case the throughput of the equipment we are currently using would be over 40Mbps.

Work is currently under way to use MIMO (multiple in multiple out) technology currently commonly in use in the higher frequency technologies, this has the potential to double the throughput but so far this has meet with limited success, it works as expected on a good link with few trees or obstacles but rapidly fails in poor conditions due to variations in signal propagation of the 2 transmit chains.