HSDPA WorkshopErlang Traffic
RAB Holding Time
For each traffic class there are counters for RAB Holding time.
They are incremented (denominator also):
when the RAB is released
in the cell that was the reference when the RAB is released
and in the hour in which it was released
RAB duration for PS interactive class (measuring the time from RAB Assignment Response to RAB Assignment Response for release (or Iu Release command)) is defined as:
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DCH Holding Time
For NRT traffic classes (interactive and background) there are also counters for DCH Holding time .
They are incremented:
when the RAB is released
only on the cell that was the reference when the RAB is released
and in the hour in which it was released
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Erlang for CS services
The KPI should be generated on a daily and cluster basis (due to the triggering rules of the RAB holding time).
Same KPI for each CS traffic class:
CS_AMR
CS_STREA
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Average Time between drop
The KPI represents the average time between abnormal RAB releases during CS voice RAB active phase:
The KPI should be generated on a daily and cluster basis (due to the triggering rules of the RAB holding time).
Same KPI for each traffic class:
CS_CONV
CS_STREA
PS_INTER
Traffic Mix KPIs
The KPI provides an indication of the percentage of CS voice, CD data, PS data RAB establishment attempts relative to the total number of RAB establishment attempts.
The KPI is meaningful for cluster/cell level and on day/hour basis
These KPI are intended to provide a high level indication of the traffic profile loading the network:
CS_VOICE
CS_CONV
CS_STREA
PS_CONV
PS_STREA
PS_INTER
PS_BACKG
Calculate the Erlang Traffic
What is Mean Time between Drop for CS voice call ?
in minutes
Include CS voice, CS video, PS Interactive, PS Background
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