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tch blocking and tch congestion

Viewing 15 posts - 31 through 45 (of 99 total)
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  • #52054 Reply
    tarun
    Guest

    what is GOS means

    #52055 Reply
    Gerald
    Guest

    How can i calculate my SDCCH accessibility. Please if i have a low SDCCH accessiblity rate will it affect my call drop rate

    #52056 Reply
    Barrie
    Guest

    Please can anyone tell the key parameters to consider in calculating the trunk usage for Ericcson BSC

    #52057 Reply
    Ayat
    Guest

    hello

    what is GOS means?
    Gos grade of service (blocking)

    in radio part we design the network forcertian Gos , for example Gos in 2%, by erlang table B, there is a relation between number of channel , blocking rate ,and traffic.

    so according to number of channel and Gos we can know the desgin traffic.

    #52058 Reply
    nitin
    Guest

    hello all,
    can anybody tell me how can we define possible trx configuration for a specific alloted frequency spectrum?
    eg:if a service provider is allocated with 4.4mhz frequency band,then what is the possible trx config. for this.

    #52059 Reply
    vipul
    Guest

    can anybody tell me the meaning of the alarm ” mean holding time below thresold” in Nokia system?

    #52060 Reply
    Majid
    Guest

    Hi all,

    in Huawei BSC32 there is what’s called TCH congestion Rate (TCH Overflow) (%) i didn’t find the formula behind it but i found the one for SDCCH congestion Rate (SDCCH overflow) (%), which is
    (Attempted SDCCH seizures meeting an sdcch blocked state/attempted sdcch seizures all), so it looks similar.
    So i get for tch cogestion overflow for one cell 40%
    and tch congestion 3% so why this big difference do you think.

    #52061 Reply
    Ayat
    Guest

    Hello,

    Dear , Majid becuase as you know SDCCH is a control channel the user and network use this channl for many thing

    location upadte , IMSI deatach,
    recall estiblshed ,, sms ,,so try to check the defination of this KPI,attempted sdcch seizures all

    which services are include in this counter , you have to know the traffic from whaere

    also check your resourcse .

    #52062 Reply
    Gerald
    Guest

    SDCCH SDCCH SDCCH SDCCH
    ASSIGN SEIZURE ASSIGN ACCESS
    SUCCESS ATTEMPT FAILED

    1470 3375 1905 43.56%
    261 486 225 53.70%
    768 1302 534 58.99%
    163 255 92 63.92%

    Please these are sites with worst SDCCH accessibility. Can someone help me with reason for such accessibility.

    #52063 Reply
    nitin
    Guest

    Hello all,

    can anybody explain me the MAIO plan with a suitable eg.???????

    #52064 Reply
    uLVa
    Guest

    haii…
    can i ask u??

    formula for

    1 TCH Call Blocked
    2 TCH Assign Success Rate
    3 Call Success Rate
    4 Drop Call Rate
    5 SDCCH Call Blocked
    6 SDCCH Assign Success Rate
    $7 Handover Success Rate
    8 Handover Failure Rate

    please help me,,
    coz i need that for my thesis

    #52065 Reply
    Mak
    Guest

    1 TCH Call Blocked
    2 TCH Assign Success Rate
    3 Call Success Rate
    4 Drop Call Rate
    5 SDCCH Call Blocked
    6 SDCCH Assign Success Rate
    $7 Handover Success Rate
    8 Handover Failure Rate

    These all formula varies vendor to vendor

    #52066 Reply
    Ayat
    Guest

    Hello uLVa

    these formulas depends on vendor

    TCH Call Blocked =

    some vendor call this KPI TCH congestion rate (%) = TCH overflow*100/TCH attempts

    2 TCH Assign Success Rate

    = TCH assign request /tch attempts

    3 Call Success Rate
    100-TCH assign failure

    0r TCH seizure succ attepts/TCH attempts

    4 Drop Call Rate

    Most of vendors have two call drop

    SDCCH and TCH

    TCH call drop rate (%)
    TCH call drop /TCH sizure attemots

    also for SDCCH

    5 SDCCH Call Blocked
    SDCCH congestion

    6 SDCCH Assign Success Rate

    $7 Handover Success Rate
    handover request/handover attepts
    depends on Handover type

    8 Handover Failure Rate

    by small search in google you will get alot paper about this topic

    good luck

    #52067 Reply
    nitin
    Guest

    Hello all,

    Can anybody tel me how can we convert erlang into kbps???is there any formula….

    #52068 Reply
    Ayat
    Guest

    hello

    check this formula

    Traffic Volume for CS Domain_AMR(Kbyte)= Traffic Volume for CS Domain_AMR(Erl)×12.2×3600/8

    it deponds on the traffic type

    if we work with video trafic we will take in our consideration 64Kbps instead of 12.2

    i am not sure .

    but we create these formula by logic

    thanks

Viewing 15 posts - 31 through 45 (of 99 total)
Reply To: Reply #52058 in tch blocking and tch congestion
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