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GSM DUAL BAND NETWORK

  • This topic has 26 replies, 1 voice, and was last updated 15 years ago by Faares.
Viewing 15 posts - 1 through 15 (of 27 total)
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  • Author
    Posts
  • 9th December 2009 at 19:16 #60103
    Mak
    Guest

    HI,

    I am working in a Dual Band Network of Huwaei .Both the BCCHs of 900 and 1800 are radiating. Problem is that handover is dragging from1 1800 to 900. these handovers are happening after a dip in Rx level of 1800 abt -90.

    Pls suggest which parameters we can check and improve the handover quality.

    10th December 2009 at 06:30 #60104
    AliAsgher
    Guest

    Hi Mak,

    Can you please respecify your question. Are you saying that 1800 is keeping the call till -90? Please tell me if Enhanced Concentric Circles feature is On or Off?
    Also please tell me the values of O2U HO Received Level Threshold and U2O HO Received Level Threshold values.

    10th December 2009 at 07:42 #60105
    Bijoy
    Guest

    Wow Ali
    You are becoming a multi vendor RF expert:-)

    10th December 2009 at 11:13 #60106
    Mak
    Guest

    Yes exactly the same. 1800 is keeping the call till -90 rx level. than after it might be chance it can give the ho to 900 or not. or it can be a call drop.

    These people has been defined 900 as a layer3 and 1800 as a layer 2.

    Could you pls explain enhance concentric circle feature?

    No Overlay and Underlay ho are used only Interlayer and intralayer ho are usking.

    This is huwaie network

    Thanks

    10th December 2009 at 11:28 #60107
    AliAsgher
    Guest

    Oh OK, initially I thought that you are talking about concentric cells. But it seems you are asking about 1800 and 900 cells and delayed intercell handovers.

    Please have a look at these parameters, Inter-layer HO Hysteresis, Inter-layer HO Threshold, Layer HO Valid Time(s) and Layer HO Watch Time(s).

    These are the parameters which may trigger a Layer Handover.

    10th December 2009 at 15:16 #60108
    Mak
    Guest

    Thanks for your Prompt reply.

    Could you pls send me some settings regarding this.

    Thanks

    10th December 2009 at 15:20 #60109
    Mak
    Guest

    1. 900M cells are layer 3, 1800M cells are layer2;
    2. From lower layer to high layer, have edge HO and layer HO, but from high layer to low layer, have edge HO, but no layer HO;
    So you want to improve the HO from 1800M to 900M, but change the layer HO threshold.

    pls comment on this

    10th December 2009 at 16:25 #60110
    Mak
    Guest

    Bijoy,

    Nice answer

    11th December 2009 at 00:14 #60111
    john
    Guest

    Dears iam new in huawei and i want to help me for document how to give explanation of radio parameter if it is possible send me to my mail john198152@yahoo.com

    11th December 2009 at 04:33 #60112
    AliAsgher
    Guest

    Bijoy,

    Your help is required please 🙂

    11th December 2009 at 05:22 #60113
    AliAsgher
    Guest

    By the way, I think that as long as 1800’s SS > Interlayer Threshold – Layer HO Hyst. Then it will still be top in list (meaning will not attempt handovers UNLESS a cell with higher layer is reported). Hence this threshold is still important in my opinion. Please correct me if I am wrong.

    11th December 2009 at 09:29 #60114
    Mak
    Guest

    Hi Ali,

    Could you pls send me some detail documentation on this at my mail id
    mayank.krmittal@gmail.com

    11th December 2009 at 10:23 #60115
    AliAsgher
    Guest

    Sent.

    11th December 2009 at 14:35 #60116
    john
    Guest

    Dear AliAsgher
    Would you send me too my email is
    john198152@yahoo.com
    if you have more huawei doc please send me iam new in huawei.
    thanks in advance.
    john

    11th December 2009 at 15:30 #60117
    MAK
    Guest

    Hi,

    do you have some more documentation on edge and layer handovers?

    Thanks

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