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Roamers: access delay to visitor network

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  • #51350 Reply
    Victor
    Guest

    Hi all
    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)

    #51351 Reply
    Pix
    Guest

    Hello Victor,

    I’ve experienced this problem in russia : my MS wouldn’t select any network automatically. I had to do it manually.

    I won’t be able to help you much, because I don’t know if there is a BSS parameter that could help…

    #51352 Reply
    Pan
    Guest

    To Victor:
    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.

    #51353 Reply
    Pix
    Guest

    Pan,

    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.

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Reply To: Roamers: access delay to visitor network
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