von The Future's Black » 18. April 2005 12:31
"GSM propagates differently from the WCDMA technology used in 3G networks. For a start, how GSM cells overlap is adjusted remotely by altering the frequency each transmits at, but WCDMA is all on one frequency, so adjustment means an engineer visiting the base station and physically realigning the transmitters.
Then there's the way a WCDMA cell responds to increasing usage by effectively shrinking, a phenomenon called cell breathing. This means you need more overlapping cells to provide good coverage - and also that the best site for a GSM mast is not necessarily the best for a 3G one.
"WCDMA is much more dynamic than GSM - users interfere with each other," "Today's networks are focused on coverage. If subscribers really used services such as video streaming and data, the networks would collapse."
http://www.theregister.co.uk/2005/04/15/3g_mast_wars/"GSM propagates differently from the WCDMA technology used in 3G networks. For a start, how GSM cells overlap is adjusted remotely by altering the frequency each transmits at, but WCDMA is all on one frequency, so adjustment means an engineer visiting the base station and physically realigning the transmitters.
Then there's the way a WCDMA cell responds to increasing usage by effectively shrinking, a phenomenon called cell breathing. This means you need more overlapping cells to provide good coverage - and also that the best site for a GSM mast is not necessarily the best for a 3G one.
"WCDMA is much more dynamic than GSM - users interfere with each other," "Today's networks are focused on coverage. If subscribers really used services such as video streaming and data, the networks would collapse."
http://www.theregister.co.uk/2005/04/15/3g_mast_wars/