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2G to 3G HO

  • This topic has 56 replies, 1 voice, and was last updated 2 years, 1 month ago by push traffic to 3G.
Viewing 12 posts - 46 through 57 (of 57 total)
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  • #61934 Reply
    alcatelman
    Guest

    Hello Pix,
    i have tried yoour proposition and everything seems ok now.
    But i just observed that more channel requests are going to the GSM band. I increased CRO for the DCS concentris cell to 14dB without improvement.
    GSM CRO for neighbour cells are at 0dB.
    Pls advice. This started after the Concentric cell implementation.

    #61935 Reply
    pix
    Guest

    hi,

    could you confirm your cell topology ?

    you have, for each sector:
    1 GSM cell “standalone” (cell type = single ?)
    1 DCS cell “concentric” (cell type = single concentric ?)

    am i correct ?

    why did you implement monoband concentric DCS cell ? don’t you have enough DCS frequencies already ?

    i’m not very convinced by your topology, please explain..

    to increase normal assignment in the DCS, yes, the idea would be to increase the CRO. Ensure the C2 criteria is enabled in your DCS cell (param_reselect_ind).
    With a cro=14dB you should have a nice balance between gsm and dcs. Could you please share your qos stats?

    Regards
    pix

    #61936 Reply
    alcatel man
    Guest

    Hello pix,
    i just checked the NPO and discovered that Penalty Time was set to 31(infinity). I think this could be the cause since:
    If penalty time is not infinity,
    C2=C1+CRO-TO
    else if PT=infinity,
    C2= C1-CRO

    Cell is currently under monitoring.
    Thanks

    #61937 Reply
    pix
    Guest

    yes, you are right.

    Set the penalty time to 40s, in order to use C2 = C1 + CRO -TO

    that would push a lot more traffic in DCS cell, for sure !

    good job 🙂
    pix

    #61938 Reply
    alcatel man
    Guest

    Thanks a great deal for the support

    #61939 Reply
    External Interference
    Guest

    Hello Pix,
    I am haveing uplink interference in a GSM cell on both the fixed frequency TRX and hopping TRX. I suspect external interference. I’ve installed band pass filters without success. Pls advice, it’s really causing problems with customer.

    #61940 Reply
    pix
    Guest

    hi,

    what are the stats for Idle Band measurements, per TRX?

    if it is external interference located in the UL GSM band, the only way to properly fix it is to scan the area, fond which frequencies are impacted and what is the source.
    Then shut it down.

    The cowardly way is to find clean frequencies, knowing that the problem might be on all frequencies or that it can randomly appear anywhere.

    Cheers
    pix

    #61941 Reply
    alcatel man
    Guest

    thanks pix

    #61942 Reply
    alcatel man
    Guest

    Hello,

    After swap from Is it possible to experience issues on 3G2G HO success rate as per NPO KPI point of view, while on user experience everything is ok. I think mayb it is because the SGSN never releases the pdp on 3G after HO.
    Pls advise

    #61943 Reply
    shailendra
    Guest

    why we cannt define 2g to 3G handover.

    #61944 Reply
    Amatigue
    Guest

    I have some problem on my Atcatel Utran: some mobile like blackberry don’t make a resection 2G/3G. please help me !

    #61945 Reply
    push traffic to 3G
    Guest

    push traffic to 3G

Viewing 12 posts - 46 through 57 (of 57 total)
Reply To: 2G to 3G HO
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