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Thread: TCH Availability Definition

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    TCH Availability Definition

    TCH Availability indicates the ratio of the number of available TCHs
    to the number of configured TCHs in a measurement period. In the
    case of dynamic conversion between TCH and PDCH, the number
    of configured TCHs refers to the number of dynamically configured
    TCHs, that is, the actual number of TCHs after dynamic conversion.



    TCH Availability =
    Mean Number of Available Channels (TCHF)/Mean Number of
    Dynamically Configured Channels (TCH) x 100%

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    TCH Availability is one of resource utilization KPIs. When TCH availability is low,
    available TCHs may be insufficient for voice services even if sufficient TCHs are
    dynamically configured. Thus, TCHs are heavily congested and the access success rate
    is decreased. In addition, user experience is adversely affected


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