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Cell Recellection

Viewing 8 posts - 16 through 23 (of 23 total)
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  • 17th February 2008 at 16:01 #50684
    Pix
    Guest

    Mazin,

    No, that’s not your problem.
    When you’re doing the drive test, stop at the point where you should reselect Cell 1, but you’re actually reselected to Cell 2.

    Give me the following value, for EACH cell :

    RXLEV

    and the following cell parameters : RXLEV_ACCESS_MIN
    CELL_RESELECT_OFFSET
    TEMPORARY_OFFSET
    PENALTY_TIME
    MS_TXPWR_MAX_CCH

    Then we can tell you why you don’t reselect cell 1 🙂

    Regards,
    Pix

    17th February 2008 at 20:40 #50685
    paraHO
    Guest

    Mazin net test GSM/GPRS from Alcatel 735 BE4

    GSM tracks x 8 screens
    ———-
    ARF
    BSI
    RSSI
    RXL
    L1S
    L1P
    DSC
    LAC
    C1
    C2
    X
    H

    GPRS Tracks x 8 screens
    ———–
    ARF
    GPR
    PH
    PHU
    PB
    C’1
    C31
    C32
    TN
    CI
    RAC
    PLM
    PP
    TBF
    DPC
    UAT
    GMMO
    NSA
    SIM

    GPRS State
    ———-
    Attach State
    P-TMSI
    P-TMSI sig
    M-Slot Class
    Ntwrk.Op.Mode
    LLC Enc.Algo

    GPRS Menu
    ———
    GPRS
    B
    C GPRS
    C GSM
    UART TEST
    UART NORM
    Send Config
    Send Data
    PDP Config
    PDP Activat
    PDP Deactiv
    PDP Info
    read Counts
    Reset Counters
    PDP Open
    PDP Close

    18th February 2008 at 04:31 #50686
    Mazin
    Guest

    for cell1
    RXLEV_ACCESS_MIN=8
    CELL_RESELECT_OFFSET=5
    TEMPORARY_OFFSET=0
    PENALTY_TIME=0
    MS_TXPWR_MAX_CCH=0
    and cell2
    RXLEV_ACCESS_MIN=8
    CELL_RESELECT_OFFSET=5
    TEMPORARY_OFFSET=0
    PENALTY_TIME=0
    MS_TXPWR_MAX_CCH=0

    I hope you make us understand thanks in advance.

    18th February 2008 at 06:09 #50687
    Pix
    Guest

    And what about the RXLEV ?

    18th February 2008 at 06:41 #50688
    Mazin
    Guest

    you mean the RXLEV i get from Drivetest you mean?

    18th February 2008 at 14:39 #50689
    pix
    Guest

    mazin,

    yes, the average rxlev you get from cell 1 and cell 2, static car, at a point where you expect to reselect cell 1.

    regards,
    pix

    19th February 2008 at 04:15 #50690
    Mazin
    Guest

    as the problem now disappeared i remeber one time it was cell1=-61 and for cell2=-71

    19th February 2008 at 05:55 #50691
    Pix
    Guest

    You said “every time the c2 value of Cell2 was higher than the c2 value of the cell1 the reason was as i think i had 4 trx in cell2 and 6 trx in cell1 maybe that was the problem.”

    And then you say : RxLev(cell 1) = -61dBm and RxLev(cell 2) = -71dBm

    This is impossible with your parameter settings. In your situation, C2(cell 2) should be lower than C2(cell 1). It seems you need to double check your measures, they don’t seem accurate.

    The output power of the antenna is not taken into account in the C2 computation : whether there is 4 or 6 TRX, it wouldn’t change anything, except a lower rxlev in the mobile.

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