Measurement Counter
ZK3014:BSCRPT_KPI_TCH_TRAF_ERL_TRAF
Description
This measurement counter is equal to the average seizure number of the TCHs in all the cells controlled by a BSC. After activating the channels, the BSC collects the number of busy TCHs per second. At the end of the granularity period, the value of this counter is the result of dividing the total number of busy TCHs by the number of sampling times.
Unit
Erl.
Measurement Point
This counter is measured according to the following formula when the measurement period ends. For details on the measurement point, see "Traffic Volume of TCHs".
Formula
Traffic Volume on TCH per BSC
(Traffic Channel) = 
Traffic Volume
of TCHs
(That is, the total of the original counter Traffic Volume of TCHs in all the cells of the BSC.)
NOTE: This measurement provides the traffic volume of the TCHs in the BSC, and the accuracy is 1‰. The traffic volume of the TCHs indicates the traffic volume of the TCHs in each cell, and the accuracy is also 1‰. There is a difference between the totally calculated traffic volume of the TCHs in each cell and the traffic volume of the TCHs in the BSC because the calculation of the traffic volume involves the division operation. This difference is directly proportional to the statistical period and the number of cells, and is inversely proportional to the accuracy (currently, the accuracy is 1‰).