T0

SS/PBCH SSS EPRE

dBm/SCS

-88

RS EPRE

dBm/15kHz

-85

T0

SS/PBCH SSS EPRE

dBm/SCS

-82

–

RS EPRE

dBm/15kHz

–

-85

U – S

Message

1

Make the UE attempt an IMS voice call.

–

–

–

–

2

Check: Does the UE send NR RRCSetupRequest with EstablishmentCause set to ‘mo-VoiceCall’?

–>

NR RRC: RRCSetupRequest

1

P

3

SS transmits an NR RRCSetup message

<–

NR RRC: RRCSetup

–

–

4

Check: Does the UE transmit an NR RRCSetupComplete message to confirm the successful completion of the connection establishment including initiation of 5GSM procedure by including the SERVICE REQUEST message with Service Type set to ‘data’?

–>

NR RRC: RRCSetupComplete 5GSM: SERVICE REQUEST

1

P

5

Set the power levels according to “T0” as per Table 11.1.1a.3.1-1/2.

–

–

–

–

6-9

Steps 5-8 of expected sequence from Table 4.5.4.2-3 as defined in TS 38.508-1 [4] are performed.

–

–

–

–

10-14

Steps 1-5 of expected sequence from A.4.1a as defined in TS 34.229-5 [41] are performed for initiating an MTSI MO speech call.

–

–

–

–

15

SS transmits RRCRelease message indicating redirection to E-UTRA Cell 1.

<–

NR RRC: RRCRelease

–

–

16-21

UE performs generic procedure as defined in TS 38.508-1 [4], Table 4.9.7.2.2-1 Steps 1-6 for N1 to S1 Inter mode change with condition ‘connected without release’ & ‘mapped 5G security context’.

–

–

–

–

22-25

Generic Test Procedure as defined in Steps 5-8 of TS 36.508-1 [4] Table 4.5A.6.3-1 is performed to establish radio bearer corresponding to IMS PDN.

–

–

–

–

26

The SS configures a new RLC-UM data radio bearer with condition DRB (0,1), associated with the dedicated EPS bearer context. RRCConnectionReconfiguration message contains the ACTIVATE DEDICATED EPS BEARER CONTEXT REQUEST message. EPS bearer context #4 (QCI 1) according to table 6.6.2-1: Reference dedicated EPS bearer contexts.

<–

RRC: RRCConnectionReconfiguration

NAS:

ACTIVATE DEDICATED EPS BEARER CONTEXT REQUEST

–

–

–

EXCEPTION: In parallel to the events described in steps 27-28 the steps specified in table 11.1.1.3.2-2 will take place.

–

–

–

–

27

The UE transmits an RRCConnectionReconfigurationComplete message to confirm the establishment of the new data radio bearer, associated with the dedicated EPS bearer.

–>

RRC: RRCConnectionReconfigurationComplete

–

–

28

The UE transmits an ACTIVATE DEDICATED EPS BEARER CONTEXT ACCEPT message.

–>

RRC: ULInformationTransfer

NAS:ACTIVATE DEDICATED EPS BEARER CONTEXT ACCEPT

–

–

29

UE is triggered by MMI to release the call.

–

–

–

–

30-33

Follow the Test Steps 2-5 as defined in TS 34.229-1 [35] subclause C.32 for Generic test procedure for MO release of IMS call followed by EPS Bearer Deactivation.

–

–

–

–

34

SS transmits RRCConnectionRelease message indicating redirection to NR Cell 1.

<–

RRC: RRCConnectionRelease

–

–

35

Generic Test procedure for Tracking area updating / Inter-system change from S1 mode to N1 mode in 5GMM/EMM-IDLE mode with connected without release is present as mentioned in TS 38.508-1 [4] Table 4.9.9.2.2-1 is performed with condition ‘’Mapped EPS security context.

–

–

–

–

38

Generic Procedure as defined in TS 38.508-1 [4] Table 4.9.6.3-1A to switch off the UE in NR RRC_CONNECTED mode with T3540 started is performed.

–

–

–

–

U – S

Message

1-6

Steps 6-11 of expected sequence from A.4.1a as defined in TS 34.229-5 [41] are performed for initiating an MTSI MO speech call.

–

–

–

–

7

Step 12 of expected sequence from A.4.1a as defined in TS 34.229-5 [41] is performed for initiating an MTSI MO speech call.

–

–

2

P

Information Element

Value/remark

Comment

Condition

RRCSetupRequest ::= SEQUENCE {

rrcSetupRequest SEQUENCE {

establishmentCause

mo-VoiceCall

}

}

Information Element

Value/Remark

Comment

Condition

Service type

‘0001’B

data

Uplink data status

Present

PSI bit corresponding to IMS PDN needs to be set

Information Element

Value/Remark

Comment

Condition

RRCRelease ::= SEQUENCE {

criticalExtensions CHOICE {

rrcRelease SEQUENCE {

redirectedCarrierInfo CHOICE {

eutra SEQUENCE {

eutraFrequency

Downlink EARFCN of EUTRA cell 1

cnType

epc

}

}

}

}

}

Information Element

Value/Remark

Comment

Condition

RRCConnectionRelease ::= SEQUENCE {

criticalExtensions CHOICE {

c1 CHOICE {

rrcConnectionRelease-r8 SEQUENCE {

redirectedCarrierInfo SEQUENCE {

nr-r15 SEQUENCE {

carrierFreq-r15

Downlink NR SSB ARFCN of cell NR Cell 1

TS 38.508-1 [4] cl.6.2.3.1

subcarrierSpacingSSB-r15

}

}

}

}

}