4.30 HSDPA Release measurements

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

4.30.1 Overview of HSDPA Release

4.30.1.1 General

The HSDPA release is executed via releasing the HS-DSCH. It can happen with RRC Connection Release procedure and various Radio Bearer Control procedures. The RANAP procedures RAB Assignment Request or Iu Release Command can also be involved.

There is always a RRC procedure used but not necessarily a RANAP procedure.

As there are HSDPA release cases that doesn’t involve CN (RANAP) the triggering of required measurements is always based primarily on RRC triggering.

In cases that the CN has initiated the release of a RAB and/or Iu connection that currently has a Radio Bearer including HS-DSCH the RANAP interface is included in the triggering part of the related requirement.

4.30.1.2 Considered RRC procedures

RRC Protocol procedures related HSDPA (HS-DSCH Release)

RRC connection release (TS 25.331: RRC Connection Management procedures chapter 8.1.4):

Figure: RRC Connection Release procedure on the DCCH

Radio Bearer control /Reconfiguration procedures (TS25.331 Radio Bearer Control Procedures)

Figure: Radio Bearer Establishment, normal case

Figure: Radio Bearer Establishment, failure case

Figure: Radio bearer reconfiguration, normal flow

Figure: Radio bearer reconfiguration, failure case

Figure: Radio Bearer Release, normal case

Figure: Radio Bearer Release, failure case

Figure: Transport channel reconfiguration, normal flow

Figure: Transport channel reconfiguration, failure case

Figure: Physical channel reconfiguration, normal flow

Figure : Physical channel reconfiguration, failure case

4.30.1.3 Considered RANAP protocol procedures

RAB Assignment (TS 25.413 Chapter 8.2)

Figure: RAB Assignment procedure. Successful operation.

Iu Release (TS 25.413 Chapter 8.5)

Figure: Iu Release procedure. Successful operation.

4.30.2 Normal HSDPA Release

4.30.2.1 RNC Initiated Release due to user inactivity

  1. This measurement provides the number of times when the UE is removed from HS-DSCH transport channel due to user inactivity
  2. CC.
  3. On transmission of the RRC: RADIO BEARER RECONFIGURATION or RRC: RADIO BEARER RELEASE or RRC CONNECTION RELEASE message by the RNC when there is no more data left in the buffer to send (equals to the RANAP cause 16 user inactivity).
  4. A single integer value.
  5. The measurement name has the form HSDPA.SuccHSDSCHreleaseUserInact
  6. UtranCellFDD
    UtranCellTDDLcr
    UtranCellTDDHcr.
  7. Valid for packet switched traffic.
  8. UMTS.

4.30.2.2 Switch to DCH/FACH

The measurement definition is in section 4.24

4.30.2.3 HS-DSCH serving cell change

The measurement definition is in section 4.25

4.30.2.4 CN Initiated release

  1. This measurement provides the number of times when the UE is removed from HS-DSCH transport channel due to a release initiated by the Core Network.
  2. CC.
  3. On reception of RANAP RAB ASSIGNMENT REQUEST or RANAP IU RELEASE COMMAND that results an HS-DSCH release. The release of HS-DSCH is executed by the transmission of the RRC RADIO BEARER RECONFIGURATION or RRC RADIO BEARER RELEASE or RRC CONNECTION RELEASE message.
  4. A single integer value.
  5. The measurement name has the form HSDPA.SuccCnInitHSDSCHrelease
  6. UtranCellFDD
    UtranCellTDDLcr
    UtranCellTDDHcr.
  7. Valid for packet switched traffic.
  8. UMTS.

4.30.3 Abnormal RB releases for HS-DSCH

  1. This measurement provides the number of times when the UE is removed from HS-DSCH transport channel, and trigger reason is a failure. The reason can be e.g. RL failure.
  2. CC.
  3. On receipt by the RRC: RADIO BEARER RECONFIGURATION COMPLETE, or RRC: RADIO BEARER RELEASE COMPLETE message sent by the UE. Or when the UE does not respond to RRC: RADIO BEARER RECONFIGURATION or RRC: RADIO BEARER RELEASE message. All other release scenarios are considered as abnormal releases, which are not counted in normal releases, i.e. the release is not because of user inactivity or switch to DCH or HS-DSCH serving cell changes or CN initiated release.

d) A single integer value.

e) The measurement name has the form HSDPA.failHSDSCHrelease

f) UtranCellFDD
UtranCellTDDLcr
UtranCellTDDHcr.

g) Valid for packet switched traffic.

h) UMTS.