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3GPP TS 25.331 version 12.3.0 Release 12<br />

2107<br />

ETSI TS 125 331 V12.3.0 (2014-10)<br />

Transport<br />

Channel<br />

Traffic<br />

Volume<br />

Short<br />

time-to-trigger<br />

Transport<br />

Channel<br />

Traffic<br />

Volume<br />

Long<br />

time-to-trigger<br />

Threshold<br />

Threshold<br />

Time<br />

Time<br />

Report 1<br />

No Report<br />

Time-to-trigger<br />

Time-to-trigger<br />

Figure 14.4.3.1-2: Time-to-trigger is used to achieve time hysteresis<br />

Figure 14.4.3.1-2 shows that by increasing the time-to-trigger the report is not triggered.<br />

14.4.4 Interruption of user data transmission<br />

By including the IE "Tx Interruption after trigger", a UE in CELL_FACH state may be instructed by the UTRAN to<br />

prohibit transmission of user data on the RACH temporarily after a measurement report has been triggered.<br />

The UE shall only resume transmission of user data, when:<br />

1> it receives from the UTRAN a message allocating a dedicated physical channel, leading to the transition to<br />

CELL_DCH state; or<br />

1> the time period indicated by the IE "Tx Interruption after trigger" elapses.<br />

The transmission on signalling radio bearers shall not be interrupted.<br />

14.5 Quality Measuremen<strong>ts</strong><br />

14.5.1 Quality reporting measurement quantities<br />

For quality measuremen<strong>ts</strong>, the following measurement quantities are used:<br />

1. Downlink transport channel BLER<br />

2. Timeslot SIR (TDD only)<br />

14.5.2 Quality reporting even<strong>ts</strong><br />

When one measurement identity corresponds to multiple quality even<strong>ts</strong> for the same transport channel, the UE<br />

behaviour is not specified.<br />

14.5.2.1 Reporting event 5A: A predefined number of bad CRCs is exceeded<br />

When this event is ordered by UTRAN in a measurement control message, the UE shall send a measurement report<br />

when the amount of bad CRCs during a predefined sliding window exceeds a predefined number.<br />

The following three parameters are used in the scheme:<br />

- Total CRC = the length of the sliding window over which the number of bad CRCs are counted.<br />

ETSI

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