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basic question on Reselection

Viewing 8 posts - 1 through 8 (of 8 total)
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  • 13th January 2011 at 18:44 #65521
    Ian
    Guest

    Hello All,

    I have a basic question in Reselection process :

    Does the mobile take into account the BA list to reselect the Cells (or does it scann ALL the strongest BCCH) , meaning if i delete most of the cells that are in idle BA list, what will happend ? will i see any other neigbours in idle mode ?

    Thanks
    Ian

    13th January 2011 at 19:23 #65522
    pix
    Guest

    hi ian,

    the MS in idle mode will “see” only the cells in the BA list. Deleting neighbours from the BA list will prevent possible reselections to these neighbours.
    MS cannot do reselection to a cell which is not in the BA list.
    Only when the network is “out of coverage” will it scan ALL the BCCH.

    Regards
    pix

    14th January 2011 at 20:10 #65523
    IAN
    Guest

    Hello Pix,

    This is what i was guessing but we did some test with ALU here and suppress a cell in the reslection List, the cell is still in the list and it still reselects it !

    Wondering whats going on, and we suppressed it both ways !

    BR
    Yann

    15th January 2011 at 13:45 #65524
    pix
    Guest

    maybe an identical BCCH is still in the list. Since a neighbour cell is known only by its BCCH (from MS point of view), you should remove all cells with same BCCH from the BA list as well.

    regards
    pix

    16th January 2011 at 22:43 #65525
    Ian
    Guest

    Hi Pix,

    We make sure as well on that one that no other neigbhors would have the same BCCH, but still i do not understand whats going on, we’ll try again another test maybe by removing ALL neighbors and see whats happening.

    BR
    Ian

    17th January 2011 at 09:57 #65526
    Pix
    Guest

    Hi Ian,

    If the BCCH is not in the BA List, there is NO WAY the MS can reselect this cell.
    During a call, can this MS performs a HO to that cell as well ?

    Is your MS a TEMS MS ? I’ve noiced some “smart-a$$” behaviour from TEMS sometimes 🙂

    Regards
    pix

    18th January 2011 at 02:18 #65527
    Ian
    Guest

    Hi Pix,

    We did suppress the cells on HO&Reselect so both have been suppressed.

    We are using nemo and thats excactly what i was wondering if Nemo might be smarty and reselect/HO tothe cell, i’ll try with another phone and see whats happening.

    BR
    Ian

    18th January 2011 at 12:55 #65528
    Pix
    Guest

    Maybe it is a software problem in the BSS… When you deleted this adjacency, it should not be seen in the SI5 and SI2 messages.
    Those can be seen in the Layer-3 messages from your NEMO. When looking at those SI messages, do you still see the BCCH frequency of the neighbour ?

    If yes : then the BSS software is not working properly.
    If no : then NEMO is smarty.

    Regards
    pix

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