Sunday, 24 September 2017

Connecting Cambridge University using Wi-Fi

Came across this post from Airheads about the challenges of connecting the 800-year-old Cambridge University with Wi-Fi. I have spent a lot of time in Cambridge working with Cambridge Wireless and attending fantastic events organised by them so I have seen some of these challenges first hand. To quote from the post:
Providing services to such a prestigious institution is a real privilege but can also be daunting.  At Cambridge, the whole City is the campus as University Departments and Colleges span the City. Networking on such a distributed scale is a challenge; we have to take both the narrow and wider view at the same time. 25 years ago, the University had the foresight to begin deploying a pan-city fibre optic network, the Granta Backbone Network, to connect the hundreds of University buildings together. Today this encompasses 60 km of multicore fibre over which we run a core and distribution router network. Therefore, as all our buildings are networked together, you would think that deploying Wi-Fi on the back of that must be easy. That could not be further from the truth, as hinted at already, Cambridge is far from simple.

The most basic thing you do for a wireless deployment is a Wi-Fi survey. Here at Cambridge, we have a myriad of buildings of all shapes, sizes and types. For example, we have buildings that are eight hundred years old right through to modern structures. The construction of these buildings is amazingly diverse, from metre thick stone walls to concrete monoliths right through to simple buildings made up of modern partition walls. The latter sounds simple until you come across that surprise hefty wall with four layers of unexpected insulation or a signal killing chimney hidden in the wall. We also have constructions as varied as residential buildings, (that can also act as hotels out of term), office blocks, state of the art laboratories, lecture theatres and seminar rooms, libraries and warehouses. This means that the University Wireless Team have their work cut out surveying each of these unique environments while trying to get ubiquitous Wi-Fi into all areas. We estimate that if we surveyed each building end to end, it would take more than five years.
You can read the complete post here. Below is a video that shows some of these challenges.

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