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Ping Pong HOs

Viewing 14 posts - 1 through 14 (of 14 total)
  • Author
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  • #58867 Reply
    Optimizer
    Guest

    We’ve got loads of problems of ping-pong HOs.
    WIll like to have possible solutions on how to reduce this.

    #58868 Reply
    Pix
    Guest

    Hello,

    Could you decribe exactly what is the problem ?
    How do you “see” it ?

    Chers,
    Pix

    #58869 Reply
    Bijoy
    Guest

    Hello Optimizer.
    R u using Ericsson system?

    #58870 Reply
    Optimizer
    Guest

    We are using Alcatel system.

    The ong-pongs are mostly between co-localised 900 and 1800 co-localised cells

    #58871 Reply
    Pix
    Guest

    Hello,

    Your problem sounds extremely complicated, but since you describe it with only few words, it is impossible to give you an answer.

    If you decide to spend some time describing it properly, then I might be able to help.

    Cheers,
    Pix

    #58872 Reply
    Problem Resolved- Hamza
    Guest

    this is what you need to do
    change pbgtSrcellHreqave from 8 to 1 and it will resolve Ping Pong HO,
    i dont know parameter name in ALCATEL but this will do you good in DCS-GSM networks

    #58873 Reply
    Has UK
    Guest

    Hamza is pbgtSrcellHreqave a Nokia or Ericsson parameter?

    I use Ericsson RBS.

    thx in advance.

    #58874 Reply
    Fresh Opt
    Guest

    Hi,
    we have a microBTS installed on one high building (last 2 floors), there are a lot of ping-pong HO between a micro and macro cells. Which parameters to tune in order to reduce ping-pong HO. Four macro cells around are declared as umbrella and their level sometime are weakest than the other cells far from the building, so, it happens that in idle mode MS camps on those far cells and we have to declare HO between them and micro. How to avoid camping on those cells in order to stay in micro or macro around?
    Regards,
    Fresh Opt

    #58875 Reply
    Pix
    Guest

    Hi Fresh Opt,

    1/ increase the Cell Reselect Offset of the Indoor cell, much above the CRO of outdoor Umbrella cells.

    2/ the indoor cell is define as “Micro” or “Indoor” ? then there shouldn’t be any outgoing HO from this indoor to the umbrellas… (it’s automatic)

    3/ enable the cause 14 in Umbrellas (already done, probably) (if not, then the parameter name is EN_MCHO_NCELL, or something like this), then tune the adjacency parameter L_RXLEV_CPT_HO(Umbrella, Indoor) to a little lower value : – 77dBm or -80dBm, etc.
    The lower you go, the more traffic will be sent to the indoor cell. Don’t go too low 🙂

    Cheers,
    pix

    #58876 Reply
    Fresh Opt
    Guest

    Thanks Pix,
    I’ll try that and inform for the results!
    BR,

    #58877 Reply
    Pix
    Guest

    for the point 2, I meant that the HO cause 12 is disabled from Micro to Umbrellas (automatically). But Emergency causes (bad level, bad quality, etc) are still enabled.

    Ok, that’s all 🙂
    Cheers,
    pix

    #58878 Reply
    Fresh Opt
    Guest

    Pix, I forgot something, what about cells too far from the building. Sometimes near the window MS camps on those cells and the call is initiated in cells which do not have HO declared with micro.
    Regards,

    #58879 Reply
    Pix
    Guest

    Declare incoming HO from Umbrellas to Micro, not (or little bit) outgoing.

    There are so many neighbours at window, that it’s complex… You must work for the “better”, not for the perfect.

    #58880 Reply
    Fresh Opt
    Guest

    Thanks Pix, I appreciate that.
    Regards

Viewing 14 posts - 1 through 14 (of 14 total)
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