Number of Downlink EGPRS TBF Abnormal Releases due to FLUSH

Measurement Counter

A9308: DOWN_EGPRS_TBF_ABNORM_REL_FLUSH

Description

This measurement provides the number of downlink EGPRS TBF abnormal releases due to FLUSH in a granularity period. A high value is yielded because the cell reselection of the MS occurs frequently. In this case, the optimization for radio network environment is required.

Unit

Integer number or integer.

Measurement Point

When the MS reselects a new cell, the SGSN initiates the cell updating procedure and sends a FLUSH LL PDU to the BSC. Accordingly, the BSC terminates all the PS services of the MS in the original cell irrespective of the MS status. When the MS is in transmission state and the downlink EGPRS TBF exists, the BSC releases the downlink EGPRS TBF if the BSC receives FLUSH LL PDU from the SGSN. Figure 1 shows the procedure in which the BSC abnormally releases the downlink EGPRS TBF when receiving a FLUSH LL PDU. Each time the BSC receives the FLUSH LL PDU message (see measurement point A), the counter is incremented by one.

Figure 1 Downlink EGPRS TBF abnormal release due to FLUSH

Formula

This is an original counter without involving any formula.