Hello every one,
I wish some to help me to know more infrormations about the combination between GSM 900 and 1800.
and how to set the pramaeters sepecially HO_MARGIN, CELL RESELECT OFFSET and Directed Retry.
The main task of optimization is to direct most of the traffic in more clear band 1800.
HO_MARGIN – there are a lot kinds of handover – and for all of them there are different threholds (in most cases,for different GSM networks – different threholds)
C1 and C2 are selected for each BTS.
Directed Retry is better to set – Yes