25.1723GPPRelease 17Requirements for support of Assisted Galileo and Additional Navigation Satellite Systems (A-GANSS) Frequency Division Duplex (FDD)TS
The measurement sequence chart for the TTFF test cases, for both UE-assisted and UE-based GANSS, is defined in this subclause.
Figure D.2-1: Measurement Sequence Chart for the TTFF Test Cases
(a) The system simulator sends a RESET UE POSITIONING STORED INFORMATION message with the IE UE POSITIONING TECHNOLOGY set to AGNSS.
(b) The system simulator sends a RRC MEASUREMENT CONTROL message without assistance data including the following information elements:
MEASUREMENT COMMAND Setup
CHOICE MEASUREMENT TYPE UE positioning measurement
UE POSITIONING REPORTING QUANTITY
>Method Type set to either ‘UE assisted’ or ‘UE based’, dependent on the test case;
>Positioning Methods set to ‘GPS’;
>Horizontal Accuracy as defined in Annex B;
>Vertical Accuracy as defined in Annex B;
>Additional Assistance Data Request TRUE
>GANSS Positioning Methods set according to the UE capabilities and test case;
>UE state All states
CHOICE REPORTING CRITERIA Periodical reporting criteria
>Amount of reporting 1 (see Annex B);
>Reporting interval 20 seconds (see Annex B);
(c) The UE responds with a RRC MEASUREMENT REPORT message including the UE POSITIONING ERROR IE with ‘Error Reason’ set to ‘Assistance data missing’, and including a request for additional GPS and/or GANSS assistance data.
(d) – (e) The system simulator provides the requested assistance data that are available as defined in Annex E in one or more RRC MEASUREMENT CONTROL messages with MEASUREMENT COMMAND IE set to ‘modify’ and the CHOICE REPORTING CRITERIA set to ‘no reporting’ in all but the last RRC MEASUREMENT CONTROL message. The last RRC MEASUREMENT CONTROL message which is required to deliver the entire set of requested assistance data in step (c) includes the CHOICE REPORTING CRITERIA set to ‘Periodical reporting criteria’ as defined in step (b).
(f) The UE sends a RRC MEASUREMENT REPORT message including the IE UE POSITIONING MEASURED RESULTS with UE POSITIONING POSITION ESTIMATE INFO present in case of UE-based, or UE POSITIONING GPS MEASURED RESULTS and/or UE POSITIONING GANSS MEASURED RESULTS present in case of UE-assisted GANSS.
Steps (a) to (f) are repeated for each test instance.