11.2.10 LIMITED-SERVICE / EPS does not support IMS Emergency / Emergency call using the CS domain

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

11.2.10.1 Test Purpose (TP)

(1)

with { UE supporting IMS Emergency and Voice services and not equipped with a USIM }

ensure that {
when { UE is switched on and there are E-UTRA and UTRAN cells available with the E-UTRA cell – although preferable from cell power point of view – not supporting IMS Emergency }

then { UE camps on the UTRAN cell and upon user request is able to make a CS emergency call on the UTRAN cell }

}

11.2.10.2 Conformance requirements

References: The conformance requirements covered in the present TC are specified in: TS 36.304, clause 4.15.2.2, 5.2.9.

[TS 36.304, clause 5.2.2]

Figure 2 shows the states and state transitions and procedures in RRC_IDLE. Whenever a new PLMN selection is performed, it causes an exit to number 1.

Figure 5.2.2-1: RRC_IDLE Cell Selection and Reselection

[TS 36.304, clause 5.2.9]

In this state, the UE shall perform the following tasks:

– select and monitor the indicated paging channels of the cell as specified in clause 7;

– monitor relevant System Information as specified in [3];

– perform necessary measurements for the cell reselection evaluation procedure;

– execute the cell reselection evaluation process on the following occasions/triggers:

1) UE internal triggers, so as to meet performance as specified in [10];

2) When information on the BCCH used for the cell reselection evaluation procedure has been modified;

• regularly attempt to find a suitable cell trying all frequencies of all RATs that are supported by the UE. If a suitable cell is found, UE shall move to camped normally state;
• if the UE supports voice services and the current cell does not support emergency call as indicated in System information specified in [3], the UE should perform cell selection/ reselection to an acceptable cell of any supported RAT regardless of priorities provided in system information from current cell, if no suitable cell is found.

NOTE1: The UE is allowed to not perform reselection to an inter-frequency E-UTRAN cell in order to prevent camping on a cell on which it cannot initiate an IMS emergency call.

11.2.10.3 Test description

11.2.10.3.1 Pre-test conditions

System Simulator:

– Cell A and Cell 5.

Table 11.2.10.3.1-1illustrates the downlink power levels and other changing parameters to be applied for the cells at various time instants of the test execution. Row marked "T0" denotes the initial conditions after preamble, while columns marked "T1" is to be applied subsequently. The exact instants on which these values shall be applied are described in Table 11.2.10.3.2-1.

Table 11.2.10.3.1-1: Time instances of cell power level and parameter changes

	Parameter	Unit	Cell A	Cell 5
T0	Cell-specific RS EPRE	dBm	-60	–
	CPICH_Ec (UTRA FDD)	dBm/3.84 MHz	–	OFF
	PCCPCH RSCP (UTRA LCR TDD)	dBm/1.28 MHz	–	OFF
T1	Cell-specific RS EPRE	dBm	-60	–
	CPICH_Ec (UTRA FDD)	dBm/3.84 MHz	–	-70
	PCCPCH RSCP (UTRA LCR TDD)	dBm/1.28 MHz	–	-70

UE:

– While equipped with either a USIM or ISIM, the UE is previously registered on E-UTRAN, and when on E-UTRAN, the UE is last authenticated and registered on cell A using default message contents according to TS 36.508 [18] with the exception given in Table 11.2.10.3.3-1.

– The UE is then powered off and the USIM or ISIM is removed.

Preamble:

– The UE is in state Switched OFF (state 1) according to [18].

11.2.10.3.2 Test procedure sequence

Table 11.2.10.3.2-1: Main behaviour

St	Procedure	Message Sequence		TP	Verdict
		U – S	Message
1	The UE is switched on.	–	–	–	–
2	Wait for 60s for the UE to complete a possible cell selection.	–	–	–	–
2A	The SS changes the power level for Cell A and Cell 5 according to the row "T1" in table 11.2.10.3.1-1
2B	Wait for 60s for the UE to complete a possible cell selection.
3	Cause the UE to originate Emergency call. (see Note 1)	–	–	–	–
4	Check: Does the UE transmit an RRC CONNECTION REQUEST message on Cell 5? (see Note 2)	–>	RRC CONNECTION REQUEST	1	P
5	The SS transmits an RRC CONNECTION SETUP message on Cell 5.	<–	RRC CONNECTION SETUP	–	–
6	The UE transmits an RRC CONNECTION SETUP COMPLETE message on Cell 5.	–>	RRC CONNECTION SETUP COMPLETE	–	–
7	The UE transmits an INITIAL DIRECT TRANSFER message on Cell 5. This message includes a CM SERVICE REQUEST message.	–>	INITIAL DIRECT TRANSFER	–	–
8	The SS transmits a DOWNLINK DIRECT TRANSFER message on Cell 5. This message includes a CM SERVICE ACCEPT message.	<–	DOWNLINK DIRECT TRANSFER	–	–
9	The UE transmits an UPLINK DIRECT TRANSFER message on Cell 5. This message includes an EMERGENCY SETUP message.	–>	UPLINK DIRECT TRANSFER	–	–
10-15	Steps 11 to 16 of the generic test procedure in TS 34.108 subclause 7.2.3.2.3 are performed on Cell 5.	–	–	–	–
Note 1: The request is assumed to be triggered by AT command D. Note 2: The camping on Cell 5 for eventual Emergency services cannot directly be verified, instead the receipt of the RRC CONNECTION REQUEST message is considered as implicit indication that this has happened.

11.2.10.3.3 Specific message contents

Table 11.2.10.3.3-1: SystemInformationBlockType1 for Cell A (preamble and all steps)

Derivation Path: 36.508 clause 4.4.3.2, Table 4.4.3.2-3
Information Element	Value/remark	Comment	Condition
SystemInformationBlockType1 ::= SEQUENCE {
ims-EmergencySupport-r9	Not present	Not support IMS emergency call
}

Table 11.2.10.3.3-2: SystemInformationBlockType1-BR-r13 for Cell A (preamble and all steps when UE under test is CAT M1)

Derivation Path: 36.508 clause 4.4.3.2, Table 4.4.3.2-3A
Information Element	Value/remark	Comment	Condition
SystemInformationBlockType1-BR-r13 ::= SEQUENCE {
ims-EmergencySupport-r9	Not present	Not support IMS emergency call
}