4.14 Iu connection release

32.4053GPPPerformance Management (PM)Performance measurementsRelease 17Telecommunication managementTSUniversal Terrestrial Radio Access Network (UTRAN)

4.14.1 Overview

4.14.1.1 Considered Iu connection release procedures

Performance Measurement definitions in this subclause are based on TS 25.413 [5].

The following paragraphs are of interest for this purpose:

– Iu Release Request;

– Iu Release;

– IU RELEASE REQUEST;

– IU RELEASE COMMAND;

– IU RELEASE COMPLETE.

These paragraphs show in particular the following diagrams:

Figure: Iu Release Request procedure. Successful operation

Figure: Iu Release procedure. Successful operation

4.14.2 Iu connection release request by UTRAN

4.14.2.1 Attempted Iu connection release request by UTRAN for CS domain

  1. This measurement provides the number of attempted requests by UTRAN to release an Iu connection between the RNC and a CS CN. The measurement is split into subcounters per release cause.
  2. CC
  3. Transmission of a RANAP message IU RELEASE REQUEST by the RNC to the CS CN. Each RANAP message IU RELEASE REQUEST sent to the CS CN is added to the relevant per cause measurement. The possible causes are included in TS 25.413 [5]. The sum of all supported per cause measurements shall equal the total number of IU RELEASE REQUEST attempts. In case only a subset of per cause measurements is supported, a sum measurement subtype will be provided first.
  4. Each measurement is an integer value. The number of measurements is equal to the number of causes plus a possible sum value identified by the .sum suffix.
  5. The measurement name has the form IU.AttConnRelReqUTRANCS.Cause
    where Cause identifies the release cause.
  6. RncFunction
  7. Valid for circuit switched traffic
  8. UMTS

4.14.2.2 Attempted Iu connection release request by UTRAN for PS domain

  1. This measurement provides the number of attempted requests by UTRAN to release an Iu connection between the RNC and a PS CN. The measurement is split into subcounters per release cause.
  2. CC
  3. Transmission of a RANAP message IU RELEASE REQUEST by the RNC to the PS CN. Each RANAP message IU RELEASE REQUEST sent to the PS CN is added to the relevant per cause measurement. The possible release causes are included in TS 25.413 [5]. The sum of all supported per cause measurements shall equal the total number of IU RELEASE REQUEST attempts. In case only a subset of per cause measurements is supported, a sum measurement subtype will be provided first.
  4. Each measurement is an integer value. The number of measurements is equal to the number of causes plus a possible sum value identified by the .sum suffix.
  5. The measurement name has the form IU.AttConnRelReqUTRANPS.Cause
    where Cause identifies the release cause.
  6. RncFunction
  7. Valid for packet switched traffic.
  8. UMTS

4.14.3 Iu connection release by CN

4.14.3.1 Attempted Iu connection release by CN for CS domain

  1. This measurement provides the number of attempted release by a CS CN to an Iu connection between the RNC and a CS CN. The measurement is split into subcounters per release cause.
  2. CC
  3. Receipt of a RANAP message IU RELEASE COMMAND sent by the CS CN to the RNC. Each RANAP message IU RELEASE COMMAND received from the CS CN is added to the relevant per cause measurement. The possible causes are included in TS 25.413 [5]. The sum of all supported per cause measurements shall equal the total number of IU RELEASE COMMAND attempts. In case only a subset of per cause measurements is supported, a sum measurement subtype will be provided first.
  4. Each measurement is an integer value. The number of measurements is equal to the number of causes plus a possible sum value identified by the .sum suffix.
  5. The measurement name has the form IU.AttConnRelCNCS.Cause
    where Cause identifies the release cause.
  6. RncFunction
  7. Valid for circuit switching.
  8. UMTS

4.14.3.2 Attempted Iu connection release by CN for PS domain

  1. This measurement provides the number of attempted release by a PS CN to an Iu connection between the RNC and a PS CN. The measurement is split into subcounters per release cause.
  2. CC
  3. Receipt of a RANAP message IU RELEASE COMMAND sent by the PS CN to the RNC. Each RANAP message IU RELEASE COMMAND received from the PS CN is added to the relevant per cause measurement. The possible causes are included in TS 25.413 [5]. The sum of all supported per cause measurements shall equal the total number of IU RELEASE COMMAND attempts. In case only a subset of per cause measurements is supported, a sum measurement subtype will be provided first.
  4. Each measurement is an integer value. The number of measurements is equal to the number of causes plus a possible sum value identified by the .sum suffix.
  5. The measurement name has the form IU.AttConnRelCNPS.Cause
    where Cause identifies the release cause.
  6. RncFunction
  7. Valid for packet switching.
  8. UMTS

4.14.3.3 Successful Iu connection release by CN for CS domain

  1. This measurement provides the number of successful release by a CS CN to an Iu connection between the RNC and a CS CN. The measurement is split into subcounters per release cause.
  2. CC
  3. Transmission of a RANAP message IU RELEASE COMPLETE by the RNC to the CS CN. Each RANAP message IU RELEASE COMPLETE sent to the CS CN is added to the relevant per cause measurement. The possible causes are included in TS 25.413 [5]. The sum of all supported per cause measurements shall equal the total number of IU RELEASE COMPLETE. In case only a subset of per cause measurements is supported, a sum measurement subtype will be provided first.
  4. Each measurement is an integer value. The number of measurements is equal to the number of causes plus a possible sum value identified by the .sum suffix.
  5. The measurement name has the form IU.SuccConnRelCNCS.Cause
    where Cause identifies the release cause.
  6. RncFunction
  7. Valid for circuit switching.
  8. UMTS

4.14.3.4 Successful Iu connection release by CN for PS domain

  1. This measurement provides the number of successful release by a PS CN to an Iu connection between the RNC and a PS CN. The measurement is split into subcounters per release cause.
  2. CC
  3. Transmission of a RANAP message IU RELEASE COMPLETE by the RNC to the PS CN. Each RANAP message IU RELEASE COMPLETE sent to the PS CN is added to the relevant per cause measurement. The possible causes are included in TS 25.413 [5]. The sum of all supported per cause measurements shall equal the total number of IU RELEASE COMPLETE. In case only a subset of per cause measurements is supported, a sum measurement subtype will be provided first.
  4. Each measurement is an integer value. The number of measurements is equal to the number of causes plus a possible sum value identified by the .sum suffix.
  5. The measurement name has the form IU.SuccConnRelCNPS.Cause
    where Cause identifies the release cause.
  6. RncFunction
  7. Valid for packet switching.
  8. UMTS