Keith Gremban: Planning for the Wireless World


hello it start so i TS is the laboratory
branch for the National Telecommunications and Information
Administration and the FCC and the NTIA manage us spectrum and it’s a
complicated problem and as we move into a wireless world it gets more
complicated so we’re developing tools and technologies to help cities plan for
this so let’s suppose we’re going through developing a new wireless
application we pick an interesting application like a mobile augmented
reality application okay so you could use this in the city for tourism for
navigation or to even show people what a neighbourhood could look like instead of
what it does look like so what are the requirements for this application going
to be what’s the strain going to be on your infrastructure both wired and
wireless and you know you have to think about this in the midst of the fact that
with the emergence of the Internet of Things the number of wireless devices is
growing exponentially so the IITs we start with the end-user experience the
bottom line is what does the end-user think about the experience and we’ve got
tools and technologies to determine what’s the minimum bandwidth
requirements for example to make this augmented reality app appealing to
somebody so if they’ll actually come back and use it and then look at your
existing infrastructure is it sufficient to satisfy the requirements of this new
application and you want to do a prototype implementation in a high
bandwidth neighborhood so we need to think deeper about requirements than
just the raw bandwidth because it really depends upon your demand and as you
crank up the demand aisle that’s gonna start straining your infrastructure in
different ways do you have the wireless capacity in the wired capacity to handle
this as part of that you need to think about challenging scenarios the world is
shifting the wireless so you’ve got your application worried and now everybody
starts streaming video over the same frequencies that you’re using is there
enough room for that so where do you get your spectrum from there’s really just
two choices right now you’ve got licensed spectrum that you could lease
from a company for example or open unlicensed spectrum in each of
these has pros and cons so you need to do the trades on this how do you decide
what the cost of you’re installing your own infrastructure is versus the cost of
licensing fees how do you figure out the capacity versus cost equation and then
let’s look at Wireless and unlicensed okay so what’s the baseline capacity
what’s your surge capability are you able to handle unexpected events what’s
going to happen is more and more unlicensed devices come into this
spectrum and then you look at the white license domain it may already be
congested is there enough Headroom for an emergency or for example let’s say
we’ve made our choice okay so we’ve had our you reach a moment we’re gonna go
with one or the other now there’s some other considerations you have to take up
so big one of course is security if you’re committing to a wireless system
you’ve opened up a new attack vector and you’ve got to worry about what is your
vulnerability to a bad actor potentially coming in taking over some of your
wireless circuits and altering your entire application and hijacking it now
we’ve got a new wrench somebody decides this not only has to work outdoors but
indoors as well now we’ve got more challenges for example indoors presents
unique propagation challenges in the spectrum you know in fact modern high
energy-efficient buildings with low E glass have really poor propagation
properties so if you want this to work everywhere now you’ve got to install
infrastructure inside buildings as well which is going to cause some problems so
let’s say we’ve succeeded now we sit back let’s not rest on our laurels no
we’ve still got a monitor in and take care of our spectrum just like we would
any other resource so for example interference will occur you need a
spectrum monitoring system in place if you’re concerned about this application
being up all the time to locate and identify
sources of interference as well as to look for spots of spectral congestion so
you know where to install more infrastructure so now if you’ve got it
all working is that let’s say it’s super popular it’s spreading was this expected
do you have the dollars to continue the build-out of this so just in conclusion
planning for spectrum is just like planning for any other resource we’re
developing the tools and technologies to allow people to do this planning but the
technology is constantly changing you’ve got to constantly be keeping up with it
and looking at what these new challenges are going to be thank you

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