Number of CS Upgrades on Downlink GPRS TBF

Measurement Counter

L9116: DOWN_GPRS_TBF_CS_UPGRADE

Description

This measurement provides the number of CS upgrades on the downlink GPRS TBF in a cell in a granularity period. If the Number of CS Upgrades on Downlink GPRS TBF is greater than the Number of CS Degrades on Downlink GPRS TBF, it indicates that the network quality is good. If both the Number of CS Upgrades on Downlink GPRS TBF and the Number of CS Degrades on Downlink GPRS TBF are great, it indicates that the network quality is poor, and the coding scheme of the MS may be frequently adjusted.

Unit

Integer number or integer.

Measurement Point

Every time the BSC changes the CS coding scheme, it determines whether to upgrade or degrade the CS coding scheme by comparing the current CS coding scheme with the previous CS coding scheme. Figure 1 shows the procedure in which the BSC sends a data block using more robust CS coding scheme to the MS. Every time the BSC sends a DOWNLINK RLC DATA BLOCK message for the upgrade of the coding scheme (see measurement point A), the counter is incremented by one.

Figure 1 Uplink GPRS TBF data transmission for the upgrade of CS coding scheme

Formula

This is an original counter without involving any formula.