User`s guide

Agilent PXT Wireless Communications Test Set
User’s Guide
180
Performing Circuit Switched Fallback
Mobile Originated CSFB
Prior to performing the CSFB, the 8960 must be set up to respond to Unexpected Page Response (refer to
WCDMA Unexpected Page Response
or GERAN Unexpected Page Response). The voice parameters (if
required) must also be set (refer to WCDMA AMR Setup
or GERAN Channel Mode Setup).
The LTE scenario file must be modified to respond to an ulInformationTransfer with
EXTENDED_SERVICE_REQUEST on the appropriate scenario tab. This sends an rrcConnectionRelease with
redirectedCarrierInfo of type utra-TDD, utra-FDD or geran and frequency as set on the 8960.
The CSFB is now exercised by camping the UE and initiating a MO voice call.
Mobile Terminated CSFB
Prior to performing the CSFB, the 8960 must be set up to respond to Unexpected Page Response (refer to
WCDMA Unexpected Page Response
or GERAN Unexpected Page Response). The voice parameters (if
required) must also be set (refer to WCDMA AMR Setup,
GERAN Channel Mode Setup, or GERAN AMR
Setup).
The scenario file must be modified with one (or both) of the following as a Custom message on the
Extended tab of the N6062 Protocol Message Editor software application:
• If the UE will be RRC-Idle when initiating the MT call, you must add a PCCH message to page the
UE with the cn-Domain being cs (informing it of the MT call).
• If the UE will be RRC-Connected when initiating the MT call, you must add a DL-
InformationTransfer message with dedicatedInfoNAS being a CS_SERVICE_NOTIFICATION
In either case, the UE response is the same. Therefore, the scenario file must also respond to an
ulInformationTransfer with EXTENDED_SERVICE_REQUEST on the appropriate scenario tab. This sends an
rrcConnectionRelease with redirectedCarrierInfo of type utra-TDD, utra-FDD or geran and frequency as set
on the 8960.