So in this case here we have a single user here
that's trying to communicate with this antenna, which
is something which we'll call the base station.
And these two things in our world, for this part one of the class,
are really going to be the only two things that
ever want to talk to each other.
It's from one point to another point.
Now of course what might happen is that you
might have several people in the same region
and they all want to make a telephone call.