837 B
837 B
lec23
Wifi stuff in this lecture... jk its cellular shit wew lad
Pieces
- base station
covers an area for users
- users
yea
- air interface
most(all) of this based on air to air connections
Dividing up signals
Either we use TDMA or FDMA at the cell tower level.
Mobility
Since we're dealing with dealing with literally moving targets now we have to consider a few new things, like handling how cell tower's deal with people connecting and disconnecting all the time. Moving from access point to access point we must somehow maintain connections.
To route this kind of thing we have two options:
- Let routing handle it
Just like previous lectures, send off some data and hope that the data gets to the right place
- End system offloading
Let end systems deal with it via direct or indirect routing.