3.59.27 TmImsiBindingDuration

Measurement ID

11421

Measurement Group

P-DRA Diameter Usage

Measurement Type

Simple

Measurement Dimension

Arrayed

Description

Histogram of IMSI binding durations.

Collection Interval

5 min

Peg Condition

When an ImsiApnAnchorKey binding is removed due to removal of the last session reference associated with that binding, the appropriate histogram instance shall be incremented by 1.

If an ImsiApnAnchorKey record is removed when the only session references are in one of the "early" states (i.e. Early Master or Early Slave), this measurement must not be incremented, to prevent skewing the data with binding capable sessions that were never successfully established.

Measurement Scope

Network, Place Association, Resource Domain

Recovery

1. This measurement shows a histogram of subscriber binding lifetimes, providing information to assist in predicting the duration of a binding SBR Database Reconfiguration.

   The histogram shows the durations of IMSI bindings. A given subscriber (IMSI) may have more than one binding. A binding may have more than one session associated with it.

   Histogram measurements consist of 101 array entries:

   • 0 – Overflow. Incremented if duration is greater than 9,830 minutes.
   • 1-5 – 1 minute buckets. Incremented for durations between 0 and 5 minutes.
   • 6-10 – 5 minute buckets. Incremented for durations between 0 and 30 minutes.
   • 11-15 – 10 minute buckets. Incremented for durations between 30 and 80 minutes.
   • 16-20 – 30 minute buckets. Incremented for durations between 80 and 230 minutes.
   • 21-100 – 120 minute buckets. Incremented for durations between 230 and 9,830 minutes.