Anybody knows what Nokia 2G BSS parameters must be modified to improve (acelerate) access to a visitor network in case of roamers (mobile with automatic roaming)
We have been notified some roamers have problems in access a GSM network (more than 30 seconds after turn-on mobile)
It is mandatory that the UE shall search for its last Registered PLMN in every supported bands at power on(UMTS2100, EGSM900, GSM1800 and possibly even GSM850 and GSM1900 depending on the implementation) before possibly reselecting a different PLMN, such as a National Roaming Partner. Today, such a scan takes a long time in dense or complex radio environment, which means the UE can spend over a minute!!!!! searching/synchronising/decoding cells where only Foreign PLMNs are to be found.
Hence your problem is overall Mobile system problem, not Nokia 2G BSS one.
that’s right, yet it takes more time in some countries than in others… but that’s based purely on perceptions, not actual measurements.
Perhaps some CCCH congestion could slow down the attachment process, especially in international airports, during “busy/landing” hours.