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HLR migration

Viewing 12 posts - 1 through 12 (of 12 total)
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  • #62582 Reply
    Iviks
    Guest

    Hello to all,
    We are going for HLR migration in our network of around 545k sub base from HLR1 to HLR2.
    After copying all 545k subs in HLR2 and creating/modifying all other required database i.e IMSI & MGT to HLR2 from VLR, we are planning for execute gsm restoration command in HLR1 followed by change in periodic LU BSS timer to 6 min.
    Now my doubt is sending GSM restoration and change in LU timer is enough for the migration? Will VLR will work to initiate send authentication info message for the subscriber for the LU in HLR2.my concern is will VLR will send SAI msg to HLR1 or HLR2.
    Also please suggest if i am missing anything.provisioni of subs already taken care.
    Regards…

    #62583 Reply
    C300G
    Guest

    Some equipment ignores “HLR reset” message. Better use “Cancel location” for each subscriber before migration of his profile.

    #62584 Reply
    Iviks
    Guest

    Thanks for reply, but is it a practical solution of giving cancel location to each subscriber.imagine if there is 2 million subscriber.

    #62585 Reply
    Waqas.A
    Guest

    Dear Iviks,

    Following steps must be taken before/during the HLR migration:

    1. Database backup for modification of data if this is an inter-vendor HLR migration.
    2. Provisioning embargo for data consistency.
    3. Database dump after the embargo
    4. Data modification according to the new HLR DB format
    5. Routing of SCCP messages from signalling gateway (STP in many cases these days) to the new HLR2
    6. Reduction in BSS/RAN LU timer
    7. Necessary testings and their verification from charging perspective.

    I think your query of sending SAI to new HLR will be addressed in point no. 5

    I hope it helps you out.

    BR,
    Waqas

    #62586 Reply
    Iviks
    Guest

    Thanks Waqas for your reply.please clarify will single periodic LU by change in BSS times triggers VLR to send SAI msg to new HLR according to SCCP routing.or there must be old HLR restart to remove AUC triplets from VLR and that will trigger to send SAI request when PLU.

    #62587 Reply
    paraHO
    Guest

    Iviks

    Just thought

    T3212 periodic location update timer SIM, would that cause issues for your HLR migration plan?

    BR

    #62588 Reply
    gepeto_28
    Guest

    How was the migration??
    In my case LU did not trigered VLR to sedd SAI to new HLR.
    Any advice on how to solve it?

    #62589 Reply
    Peter
    Guest

    For migration i think the best way is to send MAP reset from old HLR to all VLR, easiest way 🙂 we didi it before and it works

    #62590 Reply
    kevin
    Guest

    does reset message affect MTC? before periodic LU timer trigered

    #62591 Reply
    Mahmoud
    Guest

    You can send RESET message from old HLR to VLRs.

    But consider if you have more than one VLR, it should be send with delay between each RESET.

    #62592 Reply
    vlm
    Guest

    Please could you answer for “stupid” question: MAP RESET message is sent by using TC-BEGIN or TC-UNI? Thanks in advance.

    #62593 Reply
    Wallis Dudhnath
    Guest

    From this thread I see that the static (e.g. MML commands) and dynamic data has been addressed.

    Just be aware of the SCCP signalling load. Attention should be paid to the load.

    VBR/ Wallis Dudhnath

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