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What are UL and OL?

Viewing 8 posts - 1 through 8 (of 8 total)
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  • 26th January 2010 at 13:38 #60882
    Rocel
    Guest

    Dear Pix

    Could you explain me, please:

    1. What are UL and OL?

    2. What is main focus for concentric cells? Do the tilt of 900 and 1800 should be same or not?

    26th January 2010 at 17:04 #60883
    Pix
    Guest

    Hello Rocel,

    Please use the search function, you will find other topics related to UL and OL (i don’t know anything about that, i don’t work with it…)

    2/ concentric cells are used in multiband networks, so that outer zone is 900, inner zone is 1800. Goal is to simplify settings (intracell HO), gain 1 TS for TCH, instead of using if for the 1800BCCH), reduce the nulber of neighbours declared in OMCR, etc.

    Cheers
    pix

    27th January 2010 at 06:21 #60884
    AliAsgher
    Guest

    In case of Ericsson, you can refer the concentric cells as subcell structure where UL = Underlaid and OL = Overlaid.

    UL (Outer zone, usually BCCH)
    OL (Inner zone)

    Regards,

    31st January 2010 at 15:46 #60885
    Rocel
    Guest

    Hi AliAsgher

    Should I enable Intracell HO in this case (between 1800 & 900)?

    Our vendor is Huawei, if you know which parameters should be enabled after activating concentric cells, please tell me.

    I don’t have any practice in con.cells 🙂

    1st February 2010 at 05:50 #60886
    AliAsgher
    Guest

    Dear Rocel,

    In case of Huawei, you should enable the parameter named Concentric Handover Allowed.

    If you have got the LMT installed, please go through the Handover Tab -> Concentric Data, this is where you will find parameters related to Concentric cells. (Rxlevel thresholds etc) Also some switches to enable UL to OL and OL to UL handovers.

    Regards,

    1st February 2010 at 08:40 #60887
    Rocel
    Guest

    Thanks

    Can I add extra SDCCH or PDCH to Overlaid?

    Underlaid has BCCH, SDCCH, PDCH and has wide coverage than Overlaid.

    2nd February 2010 at 06:33 #60888
    Rocel
    Guest

    Could you reply to my mail?

    4th February 2010 at 06:08 #60889
    Rocel
    Guest

    Dear guys

    Can I add extra SDCCH or PDCH to Overlaid (huawei Vendor)?

    Underlaid has BCCH, SDCCH, PDCH and has wide coverage than Overlaid.

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