Re:FBI agents track cell phones that pinged near the Capitol
by BelenusMordred on Saturday January 23, 2021 @12:23PM
(#25884182)
Modern mobile networks choose the best 7 for the client but the number of towers within physical range getting pinged is quite substantial.
It's an awesome, deep and nuanced topic certainly not suited to a political HN comments section. "Timing Advance" is the probably the jumpoff keyword for anyone interested.
Mobile towers also use beam-forming in two directions and have a few other techniques to get better signals, the metadata involved with these things (if kept) essentially drops the error range down to GPS levels if not better.
It's an awesome, deep and nuanced topic certainly not suited to a political HN comments section. "Timing Advance" is the probably the jumpoff keyword for anyone interested.
Mobile towers also use beam-forming in two directions and have a few other techniques to get better signals, the metadata involved with these things (if kept) essentially drops the error range down to GPS levels if not better.