D.2 TTFF measurement sequence chart
38.1713GPPNRRelease 17Requirements for Support of Assisted Global Navigation Satellite System (A-GNSS)TS
The measurement sequence chart for the TTFF test cases, for both UE-assisted and UE-based GNSS, is defined in this clause.
(a) The SS sends a RESET UE POSITIONING STORED INFORMATION message with the IE UE POSITIONING TECHNOLOGY set to AGNSS.
(b) The SS sends an LPP message of type REQUEST CAPABILITIES including the A‑GNSS‑RequestCapabilities IE set to TRUE.
(c) The UE sends an LPP message of type PROVIDE CAPABILITIES including the A‑GNSS‑ProvideCapabilities IE with the AssistanceDataSupportList included, indicating the assistance data supported by the UE.
(d) – (e) The SS provides the assistance data that are supported by the UE and available as defined in Annex E and Table E.1 in one or more LPP messages of type PROVIDE ASSISTANCE DATA.
(f) The SS sends an LPP message of type REQUEST LOCATION INFORMATION including the information elements defined in Table D.1.
(g) The UE sends an LPP message of type PROVIDE LOCATION INFORMATION including either the GNSS‑SignalMeasurementInformation or GNSS‑LocationInformation IE, dependent on the test case (UE-assisted or UE-based, respectively).
Steps (a) to (g) are repeated for each test instance.
Table D.1: LPP Request Location Information content for TTFF test cases.
|
Information Element |
Value/remark |
Comment |
|
RequestLocationInformation |
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> commonIEsRequestLocationInformation |
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>> locationInformationType |
‘locationEstimateRequired’ or ‘locationMeasurementsRequired’ |
Depending on test case and UE capabilities, i.e., UE-based or UE-assisted |
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>> additionalInformation |
‘onlyReturnInformationRequested’ |
|
|
>> qos |
||
|
>>> horizontalAccuracy |
As defined in Annex B.1.1 |
|
|
>>> verticalCoordinateRequest |
FALSE |
|
|
>>> responseTime |
‘20’ |
20 seconds |
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> a-gnss-RequestLocationInformation |
||
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>> gnss-PositioningInstructions |
||
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>>> gnssMethods |
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>>>> gnss-ids |
According to UE capabilities |
|
|
>>> fineTimeAssistanceMeasReq |
FALSE |
|
|
>>> adrMeasReq |
FALSE |
|
|
>>> multiFreqMeasReq |
TRUE or FALSE |
Depending on UE capabilities |
|
>>> assistanceAvailability |
FALSE |