Measurement Counter
L01033:IPPM_FORWARD_DROPMEANS
Description
This measurement provides the average packet loss rate over an IPPM link from the BSC to the BTS in a granularity period.
NOTE: In Abis over IP mode, one service connection between the BSC and the BTS is mapped onto one IPPM link. Four types of IPPM services are supported: CS voice, CS data, PS HighPRI, and PS LowPRI. The signaling connection between the BSC and the BTS is not mapped onto any IPPM link.
Unit
%.
Measurement Point
The counter is measured on the BSC side, as shown in Figure 1.
Formula
IPPM_FORWARD_DROPMEANS = (IPPM_PKTS_TX - IPPM_PEER_PKTS_RX) x {100}/IPPM_PKTS_TX
IPPM_FORWARD_DROPMEANS: average IPPM forward packet loss rate.
IPPM_PKTS_TX: number of packets sent by the BSC over an IPPM link.
IPPM_PEER_PKTS_RX: number of packets received at the IPPM peer end.