Out-of-Synch Handling of Output Power Measurement Description

Out-of-Synch Handling of Output Power Measurement Description

Last updated: January 16, 2009

This section is only applicable to the lab application.

How is an Out-of-Synch Handling of Output Power Measurement Made?

Out-of-synchronization handling of output power measures the UE's ability to monitor the downlink DPCCH quality and turn its transmitter on or off based on the quality level.

3GPP TS 34.121 5.4.4.2 states: "When the UE estimates the DPCCH quality over the last 160 ms period to be worse than a threshold Qout, the UE shall shut its transmitter off within 40 ms. The UE shall not turn its transmitter on again until the DPCCH quality exceeds an acceptable level Qin. When the UE estimates the DPCCH quality over the last 160 ms period to be better than a threshold Qin, the UE shall again turn its transmitter on within 40 ms."

"The UE shall not shut its transmitter off before point B. The UE shall shut its transmitter off before point C, which is Toff = 200 ms after point B. The UE shall not turn its transmitter on between points C and E. The UE shall turn its transmitter on before point F, which is Ton = 200 ms after point E."

The UE's transmitter is considered to be "off" if the transmitted power is below -55 dBm and "on" if the transmitted power is above -49 dBm.

3GPP TS 34.121 Figure 5.4.4.1 Test case for out-of-synch handling in the UE

The Out-of-Synch Handling of Output Power measurement allows you to specify the time intervals and DPCCH_Ec/Ior levels between points A and F (see Out-of-Synch Handling of Output Power Measurement Parameters ). When the measurement is initiated, the test set varies its DPCCH level according to these settings. You must then measure the UE's power response using an external spectrum analyzer to determine if the UE turned its power off and on as required (see Out-of-Synch Handling of Output Power Measurement Results ).

Required Initial Conditions

Before performing the out-of-synch measurement, you must:

Recommended Initial Conditions

The following settings are recommended based on the 3GPP TS 34.121 5.4.4 requirements. Note that some of these parameters must be set before establishing a connection.

No other measurements can be running when an out-of-synch handling of output power measurement is performed. If any measurements are running when an out-of-synch handling of output power measurement is initiated, they are closed and a message is displayed to indicate that they were closed. Likewise, if any other measurements are initiated while an out-of-synch handling of output power measurement is running, the out-of-synch handling of output power measurement is closed and a message is displayed.

FDD Test Mode Operating Considerations

The out-of-synch handling of output power measurement can be performed while in FDD Test Operating Mode , however you must configure the UE such that its output power will respond appropriately to the changes in the test set's DPCCH_Ec/Ior.

Out-of-Synch Handling of Output Power Measurement Parameters

See 3GPP TS 34.121 Figure 5.4.4.1 Test case for out-of-synch handling in the UE for a definition of points A - F.

Out-of-Synch Handling of Output Power Measurement Results

The Out-of-Synch Handling of Output Power measurement does not return any measurement results at this time. Initiating the measurement only causes the test set to change its DPCCH_Ec/Ior as specified by the Out-of-Synch Handling of Output Power Measurement Parameters . You must use an external spectrum analyzer to measure the UE's resulting output power. When the Out-of-Synch Handling of Output Power measurement is initiated from the test set, the test set generates a trigger at point A that you can route to the test set's rear panel TRIG OUT connector using the Trigger Output Setup setting, to trigger the spectrum analyzer. See How Do I Make an Out-of-Synch Handling of Output Power Measurement? .

Key 3GPP Tests Performed Using the Out-of-Synch Handling of Output Power Measurement

3GPP TS 34.121 5.4.4 Out-of-synchronisation handling of output power.

Related Topics

Manual Operation: How Do I Make an Out-of-Synch Handling of Output Power Measurement?

SETup:WOOSynch

Out-of-Synch Handling of Output Power Troubleshooting

What 3GPP W-CDMA/HSPA Conformance Tests Are Supported?