SIB11 FACH Measurement Occasion Information

How Does the Test Set Support FACH Measurement Occasion?

The UE decides when to perform measurements in CELL_FACH that can be made while simultaneously receiving the S-CCPCH of the serving cell. For other requested measurements in CELL_FACH, FMO are required. In order to perform measurements using FMO, FACH Meas Occasion Cycle Len Coeff Control must be set to Present and FACH Meas Occasion Cycle Len Coeff and C-RNTI (Hex) set to desired values.

The 3GPP standards allow FMO to be configured using SIB11 or SIB12. The test set uses only SIB11 for configuration of FMO.

The SIB11 FMO settings are configured separately from the existing SIB11 measurement settings. You must configure SIB11 FMO, SIB11 inter-frequency and inter-RAT measurements so that no conflicts occur at the UE. The test set does not perform error checking to validate these settings.

The TTI of the S-CCPCH is fixed to 10 ms.

CELL_FACH state is supported when using W-CDMA RABs.

Measurement of TDD neighbor cells cannot be configured. Because of this, the UE is not asked to make TDD measurements when using FMO. In other words, the IE "Inter-RAT Measurement Indicators" is fixed to `1.'

Measurement of IS2000 neighbor cells cannot be configured. Because of this, only `GSM' is supported as the "RAT Type" IE in "FACH Measurement Occasion Info."

FACH Measurement Occasion User Settings

The following sections summarize the settings provided for configuring FMO. With the exception of Inter-frequency FDD measurement indicator and Inter-RAT measurement indicators Control , all of the settings must be set when the Operating Mode is set to Off . Then when the Operating Mode is switched back to Active Cell , SIB11 will transmit the correct FMO parameters.See How Do I Change the SIB11 FACH Measurement Occasion Information? on how to set the FMO settings from the front panel. See How Do I Change Cell Parameters? on how to set the C-RNTI.

• FACH Measurement Occasion Info Control

  If Present is selected, SIB11 includes the IE "FACH Measurement Occasion Info", and all other FMO settings are available for selection. If Absent is selected, SIB11 does not include this IE.

  GPIB Command: CALL[:CELL]:BCCHannel:FMOCcasion:CONTrol

• FACH Meas Occasion Cycle Len Coeff Control

  If Present is selected, the IE "FACH Measurement Occasion Cycle Length Coefficient" is included in the "FACH Measurement Occasion Info." If Absent is selected, the IE is not included.

  GPIB Command: CALL[:CELL]:BCCHannel:FMOCcasion:CLCoeff:CONTrol

• FACH Measurement Occasion Cycle Length Coefficient

  This setting is used by the UE to calculate M_REP, the FACH measurement occasion cycle length, using the equation provided in 3GPP TS 25.331. The test set does not transmit anything to the UE with the identified C-RNTI value via FACH during FACH measurement occasions in CELL_FACH state.

  GPIB Command: CALL[:CELL]:BCCHannel:FMOCcasion:CLCoeff

• Inter-Frequency FDD Measurement Indicator

  If the value 1 or On is selected, the UE performs measurements and evaluates cell re-selection criteria on the inter-frequency FDD cells listed in SIB11 in CELL_FACH state.This setting can only be modified when the Call or Data Status is Idle .

  GPIB Command: CALL[:CELL]:BCCHannel:FMOCcasion:FDDIndicator

• Inter-RAT Measurement Indicators Control

  If Present is selected, "Inter-RAT Measurement Indicators" and "RAT Type" are included in "FACH Measurement Occasion Info."This setting can only be modified when the Call or Data Status is Idle .

  GPIB Command: CALL[:CELL]:BCCHannel:FMOCcasion:RATIndicator:CONTrol

Related Topics

Manual Operation: How Do I Change the SIB11 FACH Measurement Occasion Information?

GPIB Commands: CALL:BCCHannel