Maximum RTT Delay of an IPPM Link

Measurement Counter

L01032:IPPM_MAXRTTDELAY

Description

This measurement provides the maximum RTT delay of an IPPM link between the BSC and 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

ms.

Measurement Point

The counter is measured on the BSC side, as shown in Figure 1.

Figure 1 IPPM performance measurement point

Formula

IPPM_MAXRTTDELAY = MAX (IPPM_RTTSUM)

IPPM_MAXRTTDELAY: maximum RTT delay.

IPPM_RTTSUM: RTT delay of single detection packet.