8.6.3 Inter-RAT Logged MDT

36.523-13GPPEvolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Packet Core (EPC)Part 1: Protocol conformance specificationRelease 17TSUser Equipment (UE) conformance specification

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

8.6.3.1 Logged MDT / UTRAN Inter-RAT measurement, logging and reporting

8.6.3.1.1 Test Purpose (TP)

(1)

with { UE in E-UTRA RRC_IDLE state camping normally on an E-UTRA cell where logged measurement is configured without areaConfiguration and the UE is able to detect a UTRA cell }

ensure that {

when { T330 is running }

then { UE is logging serving cell idle mode measurements and UTRA neighbouring cell measurements }

}

(2)

with { UE in UTRA RRC_CONNECTED state and UE has logged UTRA neighbouring cell measurements available from earlier measurements performed while in E-UTRA and plmn-Identity stored in VarLogMeasReport is equal to the RPLMN }

ensure that {

when { handover from UTRA to E-UTRA cell successfully and T330 is running}

then { UE includes the logMeasAvailable IE in the RRCConnectionReconfigurationComplete message }

}

(3)

with { UE in E-UTRA RRC_CONNECTED state and UE has logged UTRA neighbouring cell measurements available for E-UTRA and plmn-Identity stored in VarLogMeasReport is equal to the RPLMN }

ensure that {

when { receiving UEInformationRequest message }

then { UE transmits UEInformationResponse messages with a logMeasReport with UTRA neighbouring cell measurements }

}

8.6.3.1.2 Conformance requirements

References: The conformance requirements covered in the current TC are specified in: TS 34.304, clause 8; TS 36.331, clauses 5.4.2.3, 5.6.5.3, 5.6.6.3, 5.6.8.2, 6.2.2.

[TS 36.304, clause 8 (TP1,TP2)]

The UE may be configured to perform logging of measurement results in RRC_IDLE mode with the LoggedMeasurementsConfiguration message as specified in TS 36.331 [3]. This configuration is valid while the logging duration timer is running.

If the configuration of logged measurements is valid, the UE shall perform logging of measurement results if all of the following conditions are met:

– The UE is in camped normally state in RRC_IDLE mode;

– RPLMN of the UE is the same as the RPLMN at the point of time of LoggedMeasurementConfiguration message reception;

– The UE is camped on a cell belonging to the areaConfiguration (see TS 36.331 [3]), if configured;

– The UE is camped on the RAT where the logged measurement configuration was received.

Otherwise, the logging of measurement results shall be suspended.

NOTE 1: Even if logging of measurement results is suspended, the logging duration timer and time stamp will continue, and the logged measurement configuration and corresponding log are kept.

[TS 36.331, clause 5.4.2.3 (TP2)]

The UE shall:

…

1> set the content of RRCConnectionReconfigurationComplete message as follows:

…

2> if the UE has logged measurements available for E-UTRA and plmn-Identity stored in VarLogMeasReport is equal to the RPLMN:

3> include logMeasAvailable;

submit the RRCConnectionReconfigurationComplete message to lower layers for transmission using the new configuration;

…

2> enter E-UTRA RRC_CONNECTED, upon which the procedure ends;

NOTE 2: The UE is not required to determine the SFN of the target PCell by acquiring system information from that cell before performing RACH access in the target PCell.

[TS 36.331, clause 5.6.5.3 (TP3)]

Upon receiving the UEInformationRequest message, the UE shall

…

1> if the logMeasReportReq is present and the plmn-Identity stored in VarLogMeasReport is equal to the RPLMN:

2> if VarLogMeasReport includes one or more logged measurement entries, set the contents of the logMeasReport in the UEInformationResponse message as follows:

3> include the absoluteTimeStamp and set it to the value of absoluteTimeInfo in the VarLogMeasReport;

3> include the traceReference and set it to the value of traceReference in the VarLogMeasReport;

3> include the traceRecordingSessionRef and set it to the value of traceRecordingSessionRef in the VarLogMeasReport;

3> include the tce-Id and set it to the value of tce-Id in the VarLogMeasReport;

3> include the logMeasInfoList and set it to include one or more entries from VarLogMeasReport starting from the entries logged first;

3> if the VarLogMeasReport includes one or more additional logged measurement entries that are not included in the logMeasInfoList within the UEInformationResponse message:

4> include the logMeasAvailable;

1> if the logMeasReport is included in the UEInformationResponse:

2> submit the UEInformationResponse message to lower layers for transmission via SRB2;

2> discard the logged measurement entries included in the logMeasInfoList from VarLogMeasReport upon successful delivery of the UEInformationResponse message confirmed by lower layers;

1> else:

2> submit the UEInformationResponse message to lower layers for transmission via SRB1;

[TS 36.331, clause 5.6.6.3 (TP1)]

Upon receiving the LoggedMeasurementConfiguration message the UE shall:

1> discard the logged measurement configuration as well as the logged measurement information as specified in 5.6.7;

1> store the received loggingDuration, loggingInterval and areaConfiguration, if included, in VarLogMeasConfig;

1> store the RPLMN as plmn-Identity in VarLogMeasReport;

1> store the received absoluteTimeInfo, traceReference, traceRecordingSessionRef and tce-Id in VarLogMeasReport;

1> start timer T330 with the timer value set to the loggingDuration;

[TS 36.331, clause 5.6.8.2 (TP1)]

While T330 is running, the UE shall:

1> perform the logging in accordance with the following:

2> if the UE is camping normally on an E-UTRA cell and the RPLMN of the UE is the same as the plmn-Identity stored in VarLogMeasReport and, if the cell is part of the area indicated by areaConfiguration if configured in VarLogMeasConfig:

3> perform the logging at regular time intervals, as defined by the loggingInterval in VarLogMeasConfig;

2> when adding a logged measurement entry in VarLogMeasReport, include the fields in accordance with the following:

3> set the relativeTimeStamp to indicate the elapsed time since the moment at which the logged measurement configuration was received;

3> if detailed location information became available during the last logging interval, set the content of the locationInfo as follows:

4> include the locationCoordinates;

3> set the servCellIdentity to indicate global cell identity of the cell the UE is camping on;

3> set the measResultServCell to include the quantities of the cell the UE is camping on;

3> if available, set the measResultNeighCells, in order of decreasing ranking-criterion as used for cell re-selection, to include neighbouring cell measurements that became available during the last logging interval for at most the following number of neighbouring cells; 6 intra-frequency and 3 inter-frequency neighbours per frequency as well as 3 inter-RAT neighbours, per frequency/ set of frequencies (GERAN) per RAT;

NOTE 3: The UE includes the latest results of the available measurements as used for cell reselection evaluation, which are performed in accordance with the performance requirements as specified in TS 36.133 [16].

2> when the memory reserved for the logged measurement information becomes full, stop timer T330 and perform the same actions as performed upon expiry of T330, as specified in 5.6.6.4;

[TS 36.331, clause 6.2.2 (TP1)]

– LoggedMeasurementConfiguration

The LoggedMeasurementConfiguration message is used by E-UTRAN to configure the UE to perform logging of measurement results while in RRC_IDLE. It is used to transfer the logged measurement configuration for network performance optimisation, see TS 37.320 [60].

Signalling radio bearer: SRB1

RLC-SAP: AM

Logical channel: DCCH

Direction: E-UTRAN to UE

Table 8.6.3.1.2-1: LoggedMeasurementConfiguration message

— ASN1START

LoggedMeasurementConfiguration-r10 ::= SEQUENCE {

criticalExtensions CHOICE {

c1 CHOICE {

loggedMeasurementConfiguration-r10 LoggedMeasurementConfiguration-r10-IEs,

spare3 NULL, spare2 NULL, spare1 NULL

criticalExtensionsFuture SEQUENCE {}

}

LoggedMeasurementConfiguration-r10-IEs ::= SEQUENCE {

traceReference-r10 TraceReference-r10,

traceRecordingSessionRef-r10 OCTET STRING (SIZE (2)),

tce-Id-r10 OCTET STRING (SIZE (1)),

absoluteTimeInfo-r10 AbsoluteTimeInfo-r10,

areaConfiguration-r10 AreaConfiguration-r10 OPTIONAL, — Need OR

loggingDuration-r10 LoggingDuration-r10,

loggingInterval-r10 LoggingInterval-r10,

nonCriticalExtension SEQUENCE {} OPTIONAL — Need OP

}

— ASN1STOP

LoggedMeasurementConfiguration field descriptions
*absoluteTimeInfo* Indicates the absolute time in the current cell.
*tce-Id* Parameter Trace Collection Entity Id: See TS 32.422 [58].
*traceRecordingSessionRef* Parameter Trace Recording Session Reference: See TS 32.422 [58]

LoggedMeasurementConfiguration field descriptions

absoluteTimeInfo

Indicates the absolute time in the current cell.

tce-Id

Parameter Trace Collection Entity Id: See TS 32.422 [58].

traceRecordingSessionRef

Parameter Trace Recording Session Reference: See TS 32.422 [58]

8.6.3.1.3 Test description

8.6.3.1.3.1 Pre-test conditions

System Simulator:

– Cell 1, Cell 5 – Cell 1 is E-UTRAN cell, Cell 5 is a UTRA cell.

– Cell power levels are selected according to [18] so that camping on Cell 1 is guaranteed

– System information combination 4 as defined in TS 36.508 [18] clause 4.4.3.1 is used in E-UTRA cells with content of UTRA carrier frequency list in SIB6 set as defined in TS 36.508 [18] table 6.3.1.3-1.

Preamble:

The UE is in state Generic RB Established (state 3) according to [18] on Cell 1.

8.6.3.1.3.2 Test procedure sequence

Table 8.6.3.1.3.2-1 illustrates the downlink power levels and other changing parameters to be applied for the cells at various time instants of the test execution. The configuration marked "T1" and "T2" are applied at the point indicated in the Main behaviour description in Table 8.6.3.1.3.2-2.

Table 8.6.3.1.3.2-1: Time instances of cell power level and parameter changes

	Parameter	Unit	Cell 1	Cell 5	Remark
T1	Cell-specific RS EPRE	dBm/15kHz	-97	–
	CPICH_Ec(UTRA FDD)	dBm/3.84 MHz	–	-60	S _{nonServingCell, Cell1} > Thresh _Cell1,high
	PCCPCH Ec (UTRA LCR TDD)	dBm/1.28 MHz	–	-60	S _{nonServingCell, Cell1} > Thresh _Cell1,high
T2	Cell-specific RS EPRE	dBm/15kHz	-70	–	The power level values are such that entering conditions for event 3a are satisfied.
	CPICH_Ec(UTRA FDD)	dBm/3.84 MHz	–	-100
	PCCPCH Ec (UTRA LCR TDD)	dBm/1.28 MHz	–	-100

Table 8.6.3.1.3.2-2: Main behaviour

St	Procedure		Message Sequence		TP	Verdict
			U – S	Message
1	The SS transmits a LoggedMeasurementConfiguration message including to configure the UE to perform logging of measurement results while in RRC_IDLE.		<–	LoggedMeasurementConfiguration	–	–
2	The SS transmits an RRCConnectionRelease message.		<–	RRCConnectionRelease	–	–
3	Wait 5s to allow UE to activate logging		–	–	–	–
4	The SS changes Cell 1 and Cell 5 levels according to the row "T1" in table 8.6.3.1.3.2-1. (Note 1)		–	–	–	–
5	The UE transmits an RRC CONNECTION REQUEST message on Cell 5 to initiate a routing area update procedure. (Note 1)		–>	RRC CONNECTION REQUEST	–	–
6	The SS transmit an RRC CONNECTION SETUP message.		<–	RRC CONNECTION SETUP	–	–
7	The UE transmit an RRC CONNECTION SETUP COMPLETE message.		–>	RRC CONNECTION SETUP COMPLETE	–	–
8-14	Steps 4 to 10 of the generic test procedure in TS 36.508 subclause 6.4.2.8 are performed on Cell 5. NOTE: The UE performs a RAU procedure and the RRC connection is released.		–	–	–	–
–	Exception: Steps 14AAa1 to 14AAa1b1 describe optional behaviour that depend on the UE capability.		–	–	–	–
14AAa1	IF pc_IMS = TRUE THEN SS starts 6s timer		–	–	–	–
14AAa1a1-14AAa1a3a6	The procedure defined in TS 36.523-3 Table 10.1.2.1-2 Steps 1-4a6 is performed		–	–	–	–
14AAa1a4	SS releases RRC Connection		–	–	–	–
14AAa1a5	Stop 6s timer		–	–	–	–
14AAa1b1	The 6s timer expires		–	–	–	–
14A	The SS waits for 5 s to ensure the UE is in service		–	–	–	–
15-19	Step 7 to 11 of test procedure in TS 34.123-1 subclause 12.9.14.4 is performed on Cell 5 using the UTRA reference radio bearer parameters and combination “UTRA PS RB” according to TS 36.508 subclause 4.8.3 and Table 4.8.3-1. NOTE: The UE performs Network initiated RAB re-establishment in a UTRAN cell.		–	–	–	–
–	For UTRAN FDD, EXCEPTION: Steps 20a1 to 20a2 describe behaviour that depends on the UE capability; the "lower case letter" identifies a step sequence that takes place if a capability is supported. For UTRAN TDD, goto step 21.		–	–	–	–
20a1	IF pc_UTRA_CompressedModeRequired THEN the SS transmits a PHYSICAL CHANNEL RECONFIGURATION message on Cell 5 including the DPCH compressed mode info.		<–	PHYSICAL CHANNEL RECONFIGURATION	–	–
20a2	The UE transmits a PHYSICAL CHANNEL RECONFIGURATION COMPLETE message on Cell 5.		–>	PHYSICAL CHANNEL RECONFIGURATION COMPLETE	–	–
21	The SS transmits a MEASUREMENT CONTROL message to setup inter-RAT measurement on Cell 5.		<–	MEASUREMENT CONTROL	–	–
22	The SS changes Cell 1 and Cell 5 level according to the row "T2" in table 8.6.3.1.3.2-1.		–	–	–	–
23	The UE transmits a MEASUREMENT REPORT message on Cell 5 including the E-UTRA event results.		–>	MEASUREMENT REPORT	–	–
24	The SS transmits a HANDOVER FROM UTRAN COMMAND message on Cell 5.		<–	HANDOVER FROM UTRAN COMMAND	–	–
25	Check: Does the UE include the IE logMeasAvailable in the RRCConnectionReconfigurationComplete message on Cell 1?		–>	RRCConnectionReconfigurationComplete	2	P
25A	Generic test procedure in TS 36.508 subclause 6.4.2.10 is performed on Cell 1. NOTE: The UE performs tracking area updating procedure without ISR and security reconfiguration after successful completion of handover from UTRA.	–		–	–	–
	EXCEPTION: Steps 25Ba1 to 25Ba2b1 describe optional behaviour that depend on the UE capability	–		–	–	–
25Ba1-25Ba2b1	The procedure defined in TS 36.508 subclause 4.5A.3 Steps 10a1-10a2b1 is performed
26	The SS transmits a UEInformationRequest message on Cell 1.	<–		UEInformationRequest	–	–
27	Check: Does the UE transmit a UEInformationResponse message with a LogMeasInfoList with at least one inter-RAT neighbouring cell measurement of Cell 5.	–>		UEInformationResponse	1, 3	P
Note 1: The change of power levels is to trigger an inter-RAT cell re-selection procedure to make sure that the UE is logging inter-RAT neighbouring cell measurements (logging interval=2.56 seconds) of Cell 5 while t-ReselectionUTRA timer is running (7 seconds).

8.6.3.1.3.3 Specific message contents

Table 8.6.3.1.3.3-1: SystemInformationBlockType6 for Cell 1 (preamble, 8.6.3.1.3.2-2)

Derivation Path: 36.508 table 4.4.3.3-5
Information Element	Value/remark	Comment	Condition
SystemInformationBlockType6 ::= SEQUENCE {
carrierFreqListUTRA-FDD SEQUENCE (SIZE (1..maxUTRA-FDD-Carrier)) OF SEQUENCE {			UTRA-FDD
carrierFreq[n]	Downlink UARFCN of Cell 5
cellReselectionPriority[n]	5
threshX-High[n]	5 (10dB)
threshX-Low[n]	5 (10dB)
}
carrierFreqListUTRA-TDD SEQUENCE (SIZE (1..maxUTRA-TDD-Carrier)) OF SEQUENCE {			UTRA-TDD
carrierFreq[n]	Downlink UARFCN of Cell 5
cellReselectionPriority[n]	5
threshX-High[n]	5 (10dB)
threshX-Low[n]	5 (10dB)
}
t-ReselectionUTRA	7
}

Condition	Explanation
UTRA-FDD	UTRA FDD cell environment
UTRA-TDD	UTRA TDD cell environment

Table 8.6.3.1.3.3-2: System Information Block type 19 for Cell 5 (preamble, Table 8.6.3.1.3.2-2)

Derivation Path: 36.508 table 4.4.4.1-1
Information Element	Value/remark	Comment	Condition
SysInfoType19 ::= SEQUENCE {
utra-PriorityInfoList ::= SEQUENCE {
utra-ServingCell ::= SEQUENCE {
priority	5
}
}
}

Table 8.6.3.1.3.3-3: LoggedMeasurementConfiguration (step 1, Table 8.6.3.1.3.2-2)

Derivation path: 36.508 clause 4.6.1 table 4.6.1-4.0A LoggedMeasurementConfiguration
Information Element	Value/remark	Comment	Condition
LoggedMeasurementConfiguration-r10 ::= SEQUENCE {
criticalExtensions CHOICE {
c1 CHOICE {
loggedMeasurementConfiguration-r10 SEQUENCE {
loggingInterval-r10	ms2560	2.56 seconds
}
}
}
}

Table 8.6.3.1.3.3-4: RRCConnectionReconfigurationComplete (step 25, Table 8.6.3.1.3.2-2)

Derivation path: 36.508 clause 4.6.1 table 4.6.1-9 RRCConnectionReconfigurationComplete
Information Element	Value/remark	Comment	Condition
RRCConnectionReconfigurationComplete ::= SEQUENCE {
criticalExtensions CHOICE {
rrcConnectionReconfigurationComplete-r8 SEQUENCE {
nonCriticalExtension SEQUENCE {	Not checked
nonCritriticalExtension SEQUENCE {	Not checked
rlf-InfoAvailable-r10	Not checked
logMeasAvailable-r10	TRUE
nonCriticalExtension SEQUENCE {}	Not checked
}
}
}
}
}

Table 8.6.3.1.3.3-5: UEInformationRequest (step 26, Table 8.6.3.1.3.2-2)

Derivation Path: 36.508 clause 4.6.1 table 4.6.1-23A UEInformationRequest, condition “Logged MDT”

Table 8.6.3.1.3.3-6: UEInformationResponse (step 27, Table 8.6.3.1.3.2-2)

Derivation Path: 36.508 clause 4.6.1 table 4.6.1-23B UEInformationResponse
Information Element	Value/remark	Comment	Condition
UEInformationResponse-r9 ::= SEQUENCE {
criticalExtensions CHOICE {
c1 CHOICE{
ueInformationResponse-r9 SEQUENCE {
nonCriticalExtension SEQUENCE {
lateNonCriticalExtension	Not checked
nonCriticalExtension SEQUENCE {
logMeasReport-r10 SEQUENCE {
absoluteTimeStamp-r10	Same value as sent by SS in LoggedMeasurementConfiguration in step 1
traceReference-r10 SEQUENCE {
plmn-Identity-r10 SEQUENCE {
mcc SEQUENCE (SIZE (3)) OF MCC-NMC-Digit	Same value as sent by SS in LoggedMeasurementConfiguration in step 1
mnc SEQUENCE (SIZE (2..3)) OF MCC-NMC-Digit	Same value as sent by SS in LoggedMeasurementConfiguration in step 1
}
traceId-r10	Same value as sent by SS in LoggedMeasurementConfiguration in step 1
}
traceRecordingSessionRef-r10	Same value as sent by SS in LoggedMeasurementConfiguration in step 1
tce-Id-r10	Same value as sent by SS in LoggedMeasurementConfiguration in step 1
logMeasInfoList-r10 SEQUENCE (SIZE (1..maxLogMeasReport-r10)) OF SEQUENCE {	At least1 entry where at least one entry complies to entry with index ‘x’ below
locationInfo-r10[x]	Not checked
relativeTimeStamp-r10 [x]	SS record the value
servCellIdentity-r10 [x]	Same as Cell 1
measResultServCell-r10 [x] SEQUENCE {
rsrpResult-r10	(0..97)
rsrqResult-r10	(0..34)
}
measResultNeighCells-r10 [x] SEQUENCE {
measResultListEUTRA-r10	Not present
measResultListUTRA-r10 SEQUENCE (SIZE (1..maxFreq)) OF SEQUENCE {	1 entry
carrierFreq-r9[1]	Same as Cell 5
measResultList-r9[1] SEQUENCE (SIZE (1..maxCellReport)) OF SEQUENCE {	1 entry
physCellId [1]	Same as Cell 5
cgi-Info [1]	Not checked
measResult [1] SEQUENCE {
utra-RSCP	(-5..91)
utra-EcN0	(0..49)
additionalSI-Info-r9	Not present
}
}
}
measResultListGERAN-r10	Not present
measResultListCDMA2000-r10	Not present
}
}
logMeasAvailable-r10	Not present
}
nonCriticalExtension SEQUENCE {	Not checked
}
}
}
}
}
}

8.6.3.2 Logged MDT / GERAN Inter-RAT measurement, logging and reporting

8.6.3.2.1 Test Purpose (TP)

(1)

with { UE in E-UTRA RRC_IDLE state camping normally on an E-UTRA cell where logged measurement is configured without areaConfiguration and the UE is able to detect a GERAN cell }

ensure that {

when { T330 is running }

then { UE is logging serving cell idle mode measurements and GERAN neighbouring cell measurements

}

(2)

with { UE in GPRS Registered state with active packet data transfer in NC2 mode and UE has logged GERAN neighbouring cell measurements available from earlier measurements performed while in E-UTRA and plmn-Identity stored in VarLogMeasReport is equal to the RPLMN }

ensure that {

when { UE handover from GERAN to E-UTRA cell successfully and T330 is running }

then { UE includes the logMeasAvailable IE in the RRCConnectionReconfigurationComplete message }

}

(3)

with { UE in E-UTRA RRC_CONNECTED state and UE has logged GERAN neighbouring cell measurements available for E-UTRA and plmn-Identity stored in VarLogMeasReport is equal to the RPLMN }

ensure that {

when { receiving UEInformationRequest message }

then { UE transmits UEInformationResponse messages with a logMeasReport with GERAN neighbouring cell measurements }

}

8.6.3.2.2 Conformance requirements

References: The conformance requirements covered in the current TC are specified in: TS 34.304, clause 8; TS 36.331, clauses 5.4.2.3, 5.6.5.3, 5.6.6.3, 5.6.8.2, 6.2.2.

[TS 36.304, clause 8 (TP1)]

If the configuration of logged measurements is valid, the UE shall perform logging of measurement results if all of the following conditions are met:

– The UE is in camped normally state in RRC_IDLE mode;

– RPLMN of the UE is the same as the RPLMN at the point of time of LoggedMeasurementConfiguration message reception;

– The UE is camped on a cell belonging to the areaConfiguration (see TS 36.331 [3]), if configured;

– The UE is camped on the RAT where the logged measurement configuration was received.

Otherwise, the logging of measurement results shall be suspended.

NOTE 1: Even if logging of measurement results is suspended, the logging duration timer and time stamp will continue, and the logged measurement configuration and corresponding log are kept.

[TS 36.331, clause 5.4.2.3 (TP2)]

The UE shall:

…

1> set the content of RRCConnectionReconfigurationComplete message as follows:

…

2> if the UE has logged measurements available for E-UTRA and plmn-Identity stored in VarLogMeasReport is equal to the RPLMN:

3> include logMeasAvailable;

submit the RRCConnectionReconfigurationComplete message to lower layers for transmission using the new configuration;