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Mean Holding Time by RNO

Viewing 9 posts - 1 through 9 (of 9 total)
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  • #51251 Reply
    Toofy
    Guest

    Hello,
    I observed by RNO the MHT on interface A(A_Duration_Avg) and MHT on Air interface(RTCH_Duration_Avg), I saw that the MHT on interface A is significatively greater than on the interface Air.
    I have no explanation why these values are not equal or with a slight delta in part because of the congestion on the A interface there are no other factors that explain a difference so greater.
    Does someone has worked on it or have an explanation?

    #51252 Reply
    Pix
    Guest

    Can you give an example of the values you find for interface Air and interface A ?

    Thank you 🙂

    Pix

    #51253 Reply
    Pan
    Guest

    Toofy:
    QUEUE??? OACSU??? Have you a one of this features (or both) in your network?

    #51254 Reply
    Bilal
    Guest

    Can intra-cell handovers cause this? Every intra-cell handover causes a new TCH allocation without new A interface allocation. This can result in lower values of TCH MHT.

    #51255 Reply
    Pix
    Guest

    Bilal,

    I don’t think so, the MHT should take this in account. But I’ll check it out tomorrow.

    #51256 Reply
    toofy
    Guest

    Pan, this Two features are not implemented.
    I think that the Hand Over Intra/Inter Cell are the cause of this problem because it cause a number of allocation too bigger but in A interface there’s no new allocations.
    what do you think?

    #51257 Reply
    Pix
    Guest

    Bilal,

    I was wrong : Intracell HO can cause a lower value of Mean Holding Time.

    (A TCH is seized whenever a 48.058CHANNEL_ACTIVATION message is about to be sent to the cell to activate a full rate TCH channel for normal assignment or handover.)

    #51258 Reply
    Bilal
    Guest

    Following formula can be used to calculate Call Mean Holding Time(seconds):

    3600*TCH Traffic/No. of Assignment Complete Messages

    TCASSALL is the Ericsson’s counter for No. of Assignment Complete Messages

    #51259 Reply
    pix
    Guest

    bilal,

    that’s good.. in alcatel, there are actually :

    – TCH duration avg (cumulated TCH busy time / nb of assignment complete, incl. intra HO, inc HO, TCH normal assignment)

    – Call duration average ( RTCH_duration_avg * (1 + RTCH_HO_per_Call))

    There is no “mean holding time” per say.

Viewing 9 posts - 1 through 9 (of 9 total)
Reply To: Mean Holding Time by RNO
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