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Rep SACCH and FACCH with ALU

Viewing 10 posts - 1 through 10 (of 10 total)
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  • #68956 Reply
    Ian
    Guest

    Dear All,

    Anybody tried this feature with ALU B11 ?

    Don’t know if i’m using the wrong parameters but i don’t see any improvement on the DC.

    EN_REP_DL_FACCH: “repeated DL FACCH enabled for LAPDm command frames and also for LAPDm response frames”

    REP_DL_FACCH_LEGACY_SUPPORT: “Repeated DL FACCH enabled for all AMR MS”

    REP_DL_FACCH_THRES_AME_FR : 12.2
    REP_DL_FACCH_THRES_AMR_HR 7.4

    EN_REP_SACCH: Yes

    RADIOLINK_REP_DL_SACCH : 10
    L_RXQUAL_UL_P_AMR_RXACCH: 35 (x0.1)
    L_RXQUAL_DL_P_AMR_RXACCH : 35 (x0.1)

    Thanks for your inputs
    Yann

    #68957 Reply
    Styrax
    Guest

    Hi,

    For RDFACCH, did you try to modify T200 timer according to the recommendation?

    BR

    #68958 Reply
    Ian
    Guest

    Hi Styrax,

    Do you know what are the recommendations for these T200 parameters T200_TF and T200_TH ?

    Thanks
    Ian

    #68959 Reply
    Styrax
    Guest

    Hi Ian,
    Actually T200 timers, shall be automatically increased by 40 ms in the BTS when RDFACCH is dynamically activated, whatever their values

    For RxACCH, i tested it last week :
    RSACCH : decrease call drop (radio_call_drop)
    RDFACCH : increase call drop (radio_call_drop) and decreas Handover success rate, without any impact on OUT_HO_efficiency_rate

    I can’t understand the results
    BR

    #68960 Reply
    IAN
    Guest

    Hi Styrax,

    Strange, did you get any support from TAC, we are also going to open a ticket as we did not see any improvement/degradation with these features.

    What is your BSS version ?? we are using B11 Ed1.3

    BR
    Ian

    #68961 Reply
    styrax
    Guest

    HI IAN,

    In our NW, we’re using B11 also, i took into consideration to not activate this feature on G2 BSC.

    I think that wrong values for
    RADIOLINK_TIMEOUT_BS
    RADIOLINK_TIMEOUT_BS_AMR
    RADIOLINK_TIMEOUT
    RADIOLINK_TIMEOUT_AMR

    are caused KPI degradation after feature activate

    BR

    #68962 Reply
    Ian
    Guest

    Hi Styrax,

    We have :

    RADIOLINK_TIMEOUT_BS (i cant find this parameter)
    RADIOLINK_TIMEOUT_BS_AMR(i cant find this parameter)

    RADIOLINK_TIMEOUT=24
    RADIOLINK_TIMEOUT_AMR=24

    BR
    Ian

    #68963 Reply
    Styrax
    Guest

    Hi Ian,

    RADIOLINK_TIMEOUT_BS = RADIOLINK_FAILURE_THRES

    RADIOLINK_TIMEOUT_BS_AMR = RADIOLINK_FAILURE_THRES_AMR

    BR

    #68964 Reply
    Ian
    Guest

    Hi Styrax,

    What values have you found to make SACCH and FACCH features working ?

    RADIOLINK_TIMEOUT_BS = ?
    RADIOLINK_TIMEOUT_BS_AMR= ?

    RADIOLINK_TIMEOUT= ?
    RADIOLINK_TIMEOUT_AMR= ?

    BR
    Ian

    #68965 Reply
    Thanh
    Guest

    I have the same problem like Ian, can anyone help?

Viewing 10 posts - 1 through 10 (of 10 total)
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