4 ms·
The network simply has to have a pretty good idea of where the given MS is and how fast it is moving in which direction. The network maintains some kind of CDMA
by dfox 3y ago
The network simply has to have a pretty good idea of where the given MS is and how fast it is moving in which direction. The network maintains some kind of CDMA/OFDM/whatever radio link to said MS and thus either has to know that or learns the same data from behavior of the link. What this does is formalisation of how these data can be queried and used and by whom.
- dfox 3y agoAnd as for some additional context: before multi-constellation GNSS receivers and such stuff, multilateriation from GSM timing advance was a somewhat good way to get precise position fix, especially with GSM PLMN that has additional support for using it for position fixes.