24.1.18 V2X Sidelink Communication / Pre-configured authorisation / UE out of coverage on the frequency used for V2X sidelink communication and without inter-frequency V2X configuration on anchor carriers/ operation with/without SyncRef UE / SLSS and MasterInformationBlock-SL-V2X message transmission / syncPriority in SL-V2X-Preconfiguration is set to eNB

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

24.1.18.1 Test Purpose (TP)

(1)

with { UE is authorized for performing V2X sidelink Communication, and UE is out of coverage on the frequency used for V2X sidelink communication, and UE cannot find a cell which provides inter-frequency V2X configuration (i.e. there is no suitable cell) on the anchor carrier frequency as the one pre-configured in the UE/USIM and broadcasted in SystemInformationBlockType21; UE has selected GNSS as the synchronization reference source }

ensure that {

when { syncOffsetIndicators is included in SL-V2X-Preconfiguration }

then { UE transmits SLSS and MasterInformationBlock-SL-V2X message on the frequency used for V2X sidelink communication }

}

(2)

with { UE is authorized for performing V2X sidelink Communication, and UE is out of coverage on the frequency used for V2X sidelink communication, and UE cannot find a cell which provides inter-frequency V2X configuration (i.e. there is no suitable cell) on the anchor carrier frequency as the one pre-configured in the UE/USIM and broadcasted in SystemInformationBlockType21; and UE is not directly synchronized to GNSS }

ensure that {

when { syncOffsetIndicators and syncTxThreshOoC is included in SL-V2X-Preconfiguration, and the S-RSRP measurement result of the selected SyncRef UE is below the value of syncTxThreshOoC }

then { UE transmit SLSS and MasterInformationBlock-SL-V2X message on the frequency used for V2X sidelink communication }

}

(3)

with { UE is authorized for performing V2X sidelink Communication, and UE is out of coverage on the frequency used for V2X sidelink communication, and UE cannot find a cell which provides inter-frequency V2X configuration (i.e. there is no suitable cell) on the anchor carrier frequency as the one pre-configured in the UE/USIM and broadcasted in SystemInformationBlockType21; SyncPriority corresponding to the concerned frequency in SL-V2X-Preconfiguration is set to enb.}

ensure that {

when { syncOffsetIndicators is included in SL-V2X-Preconfiguration }

then { UE select a synchronization reference according to the pre-defined priority group order }

}

(4)

with { UE is authorized for performing V2X sidelink Communication, and UE is out of coverage on the frequency used for V2X sidelink communication, and UE cannot find a cell which provides inter-frequency V2X configuration (i.e. there is no suitable cell) on the anchor carrier frequency as the one pre-configured in the UE/USIM and broadcasted in SystemInformationBlockType21; and UE is not directly synchronized to GNSS }

ensure that {

when { syncOffsetIndicators and syncTxThreshOoC is included in SL-V2X-Preconfiguration, and UE has no selected SyncRef UE }

then { UE transmit SLSS and MasterInformationBlock-SL-V2X message on the frequency used for V2X sidelink communication }

}

24.1.18.2 Conformance requirements

References: The conformance requirements covered in the current TC are specified in: TS 36.331 subclause 5.10.7.1, 5.10.7.2, 5.10.7.3, 5.10.7.4, 5.10.8.2, TS 24.386 subclause 6.1.2.3.

[TS 36.331, clause 5.10.7.1]

Figure 5.10.7.1-1: Synchronisation information transmission for sidelink communication or V2X sidelink communication, in (partial) coverage

Figure 5.10.7.1-2: Synchronisation information transmission for sidelink communication or V2X sidelink communication / sidelink discovery, out of coverage

The purpose of this procedure is to provide synchronisation information to a UE. For sidelink discovery, the synchronisation information concerns a Sidelink Synchronisation Signal (SLSS) and, in case of PS related discovery, also timing information and some additional configuration parameters (i.e. the MasterInformationBlock-SL message), while for sidelink communication or V2X sidelink communication it concerns an SLSS and the MasterInformationBlock-SL or MasterInformationBlock-SL-V2X message. A UE transmits synchronisation information either when E-UTRAN configures it to do so by dedicated signalling (i.e. network based), or when not configured by dedicated signalling (i.e. UE based) and E-UTRAN broadcasts (in coverage) or pre-configures a threshold (out of coverage).

The synchronisation information transmitted by the UE may be derived from information/ signals received from E-UTRAN (in coverage) or received from a UE acting as synchronisation reference for the transmitting UE or received from GNSS. In the remainder, the UE acting as synchronisation reference is referred to as SyncRef UE.

[TS 36.331, clause 5.10.7.2]

A UE capable of V2X sidelink communication and SLSS/PSBCH transmission shall, when transmitting non-P2X related V2X sidelink communication in accordance with 5.10.13, and if the conditions for V2X sidelink communication operation as defined in 5.10.1d are met and when the following conditions are met:

1> if in coverage on the frequency used for V2X sidelink communication, as defined in TS 36.304 [4, 11.4]; and has selected GNSS or the cell as synchronization reference as defined in 5.10.13.3; or

1> if out of coverage on the frequency used for V2X sidelink communication, as defined in TS 36.304 [4, 11.4], and the frequency used to transmit V2X sidelink communication is included in v2x-InterFreqInfoList in RRCConnectionReconfiguration or in v2x-InterFreqInfoList within SystemInformationBlockType21 of the serving cell/ PCell; and has selected GNSS or the cell as synchronization reference as defined in 5.10.13.3:

2> if in RRC_CONNECTED; and if networkControlledSyncTx is configured and set to on; or

2> if networkControlledSyncTx is not configured; and for the concerned frequency syncTxThreshIC is configured; and the RSRP measurement of the reference cell, selected as defined in 5.10.13.3, for V2X sidelink communication transmission is below the value of syncTxThreshIC:

3> transmit SLSS on the frequency used for V2X sidelink communication in accordance with 5.10.7.3 and TS 36.211 [21];

3> transmit the MasterInformationBlock-SL-V2X message on the frequency used for V2X sidelink communication, in the same subframe as SLSS, and in accordance with 5.10.7.4;

1> else:

2> for the frequency used for V2X sidelink communication, if syncOffsetIndicators is included in SL-V2X-Preconfiguration:

3> if syncTxThreshOoC is included in SL-V2X-Preconfiguration; and the UE is not directly synchronized to GNSS, and the UE has no selected SyncRef UE or the S-RSRP measurement result of the selected SyncRef UE is below the value of syncTxThreshOoC; or

3> if the UE selects GNSS as the synchronization reference source:

4> transmit SLSS in accordance with 5.10.7.3 and TS 36.211 [21];

4> transmit the MasterInformationBlock-SL-V2X message, in the same subframe as SLSS, and in accordance with 5.10.7.4;

[TS 36.331, clause 5.10.7.3]

The UE shall select the SLSSID and the subframe in which to transmit SLSS as follows:

1> if triggered by V2X sidelink communication and in coverage on the frequency used for V2X sidelink communication, as defined in TS 36.304 [4, 11.4]; or

1> if triggered by V2X sidelink communication, and out of coverage on the frequency used for V2X sidelink communication, and the concerned frequency is included in v2x-InterFreqInfoList in RRCConnectionReconfiguration or in v2x-InterFreqInfoList within SystemInformationBlockType21 of the serving cell/ PCell;

2> if the UE has selected GNSS as synchronization reference in accordance with 5.10.8.2:

3> select SLSSID 0;

3> use syncOffsetIndicator included in the entry of v2x-SyncConfig corresponding to the concerned frequency in v2x-InterFreqInfoList, that includes txParameters and gnss-Sync;

3> select the subframe(s) indicated by syncOffsetIndicator;

2> if the UE has selected a cell as synchronization reference in accordance with 5.10.8.2:

3> select the SLSSID included in the entry of v2x-SyncConfig configured for the concerned frequency, that includes txParameters and does not include gnss-Sync;

3> use syncOffsetIndicator corresponding to the selected SLSSID;

3> select the subframe(s) indicated by syncOffsetIndicator;

1> else if triggered by V2X sidelink communication and the UE has GNSS as the synchronization reference:

2> select SLSSID 0;

2> if syncOffsetIndicator3 is configured for the frequency used for V2X sidelink communication in SL-V2X-Preconfiguration:

3> select the subframe indicated by syncOffsetIndicator3;

2> else:

3> select the subframe indicated by syncOffsetIndicator1;

1> else:

2> select the synchronisation reference UE (i.e. SyncRef UE) as defined in 5.10.8;

2> if the UE has a selected SyncRef UE and inCoverage in the MasterInformationBlock-SL or MasterInformationBlock-SL-V2X message received from this UE is set to TRUE; or

2> if the UE has a selected SyncRef UE and inCoverage in the MasterInformationBlock-SL or MasterInformationBlock-SL-V2X message received from this UE is set to FALSE while the SLSS from this UE is part of the set defined for out of coverage, see TS 36.211 [21]:

3> select the same SLSSID as the SLSSID of the selected SyncRef UE;

3> select the subframe in which to transmit the SLSS according to the syncOffsetIndicator1 or syncOffsetIndicator2 included in the preconfigured sidelink parameters (i.e. preconfigSync in SL-Preconfiguration or v2x-CommPreconfigSync in SL-V2X-Preconfiguration defined in 9.3) corresponding to the concerned frequency, such that the subframe timing is different from the SLSS of the selected SyncRef UE;

2> else if the UE has a selected SyncRef UE and the SLSS from this UE was transmitted on the subframe indicated by syncOffsetIndicator3 that is included in the syncOffsetIndicators in SL-V2X-Preconfiguration, and is corresponding to the frequency used for V2X sidelink communication:

3> select SLSSID 169;

3> select the subframe indicated by syncOffsetIndicator2;

2> else if the UE has a selected SyncRef UE:

3> select the SLSSID from the set defined for out of coverage having an index that is 168 more than the index of the SLSSID of the selected SyncRef UE, see TS 36.211 [21];

3> select the subframe in which to transmit the SLSS according to syncOffsetIndicator1 or syncOffsetIndicator2 included in the preconfigured sidelink parameters (i.e. preconfigSync in SL-Preconfiguration or v2x-CommPreconfigSync in SL-V2X-Preconfiguration defined in 9.3), such that the subframe timing is different from the SLSS of the selected SyncRef UE;

2> else (i.e. no SyncRef UE selected):

3> if triggered by V2X sidelink communication, randomly select, using a uniform distribution, an SLSSID from the set of sequences defined for out of coverage except SLSSID 168 and 169, see TS 36.211 [21];

3> else, randomly select, using a uniform distribution, an SLSSID from the set of sequences defined for out of coverage, see TS 36.211 [21];

3> select the subframe in which to transmit the SLSS according to the syncOffsetIndicator1 or syncOffsetIndicator2 (arbitrary selection between these) included in the preconfigured sidelink parameters (i.e. preconfigSync in SL-Preconfiguration or v2x-CommPreconfigSync in SL-V2X-Preconfiguration defined in 9.3);

[TS 36.331, clause 5.10.7.4]

The UE shall set the contents of the MasterInformationBlock-SL or MasterInformationBlock-SL-V2X message as follows:

1> if in coverage on the frequency used for the sidelink operation that triggered this procedure as defined in TS 36.304 [4, 11.4]:

2> set inCoverage to TRUE;

2> set sl-Bandwidth to the value of ul-Bandwidth as included in the received SystemInformationBlockType2 of the cell chosen for the concerned sidelink operation;

2> if tdd-Config is included in the received SystemInformationBlockType1:

3> set subframeAssignmentSL to the value representing the same meaning as of subframeAssignment that is included in tdd-Config in the received SystemInformationBlockType1;

2> else:

3> set subframeAssignmentSL to none;

2> if triggered by sidelink communication; and if syncInfoReserved is included in an entry of commSyncConfig from the received SystemInformationBlockType18:

3> set reserved to the value of syncInfoReserved in the received SystemInformationBlockType18;

2> if triggered by sidelink discovery; and if syncInfoReserved is included in an entry of discSyncConfig from the received SystemInformationBlockType19:

3> set reserved to the value of syncInfoReserved in the received SystemInformationBlockType19;

2> if triggered by V2X sidelink communication; and if syncInfoReserved is included in an entry of v2x-SyncConfig from the received SystemInformationBlockType21:

3> set reserved to the value of syncInfoReserved in the received SystemInformationBlockType21;

2> else:

3> set all bits in reserved to 0;

1> else if out of coverage on the frequency used for V2X sidelink communication as defined in TS 36.304 [4, 11.4]; and the concerned frequency is included in v2x-InterFreqInfoList in RRCConnectionReconfiguration or in v2x-InterFreqInfoList within SystemInformationBlockType21 of the serving cell/ PCell:

2> set inCoverage to TRUE;

2> set sl-Bandwidth to the value of the corresponding field included in v2x-InterFreqInfoList;

2> set subframeAssignmentSL and reserved to the value of the corresponding field included in the preconfigured sidelink parameters (i.e. v2x-CommPreconfigGeneral in SL-V2X-Preconfiguration defined in 9.3);

1> else if out of coverage on the frequency used for V2X sidelink communication as defined in TS 36.304 [4, 11.4]; and the UE selects GNSS timing as the synchronization reference source and syncOffsetIndicator3 is not included in SL-V2X-Preconfiguration:

2> set inCoverage to TRUE;

2> set sl-Bandwidth, subframeAssignmentSL and reserved to the value of the corresponding field included in the preconfigured sidelink parameters (i.e. v2x-CommPreconfigGeneral in SL-V2X-Preconfiguration defined in 9.3);

1> else if the UE has a selected SyncRef UE (as defined in 5.10.8):

2> set inCoverage to FALSE;

2> set sl-Bandwidth, subframeAssignmentSL and reserved to the value of the corresponding field included in the received MasterInformationBlock-SL or MasterInformationBlock-SL-V2X;

1> else:

2> set inCoverage to FALSE;

2> set sl-Bandwidth, subframeAssignmentSL and reserved to the value of the corresponding field included in the preconfigured sidelink parameters (i.e. preconfigGeneral in SL-Preconfiguration or v2x-CommPreconfigGeneral in SL-V2X-Preconfiguration defined in 9.3);

1> set directFrameNumber and directSubframeNumber according to the subframe used to transmit the SLSS, as specified in 5.10.7.3;

1> submit the MasterInformationBlock-SL or MasterInformationBlock-SL-V2X message to lower layers for transmission upon which the procedure ends;

[TS 36.331, clause 5.10.8.2]

The UE shall:

1> if triggered by V2X sidelink communication, and in coverage on the frequency for V2X sidelink communication; or

1> if triggered by V2X sidelink communication, and out of coverage on the frequency for V2X sidelink communication, and the frequency used to transmit V2X sidelink communication is included in v2x-InterFreqInfoList in RRCConnectionReconfiguration or in v2x-InterFreqInfoList within SystemInformationBlockType21 of the serving cell/ PCell:

2> if typeTxSync is configured for the concerned frequency and set to enb:

3> select a cell as the synchronization reference source as defined in 5.10.13.3;

2> else if typeTxSync for the concerned frequency is not configured or is set to gnss, and GNSS is reliable in accordance with TS 36.101 [42] and TS 36.133 [16]:

3> select GNSS as the synchronization reference source;

2> else (i.e., there is no GNSS which is reliable in accordance with TS 36.101 [42] and TS 36.133 [16]):

3> search SLSSID=0 on the concerned frequency to detect candidate SLSS, in accordance with TS 36.133 [16];

3> when evaluating the detected SLSS, apply layer 3 filtering as specified in 5.5.3.2 using the preconfigured filterCoefficient as defined in 9.3, before using the S-RSRP measurement results;

3> if the S-RSRP of the SyncRef UE identified by the detected SLSS exceeds the minimum requirement defined in TS 36.133 [16]:

4> select the SyncRef UE;

3> else (i.e., no SLSSID=0 detected):

4> select a cell as the synchronization reference source as defined in 5.10.13.3;

1> else, if triggered by V2X sidelink communication, and out of coverage on the frequency for V2X sidelink communication, and for the frequency used for V2X sidelink communication, if syncPriority in SL-V2X-Preconfiguration is set to gnss and GNSS is reliable in accordance with TS 36.101 [42] and TS 36.133 [16]:

2> select GNSS as the synchronization reference source;

1> else, for the frequency used for sidelink communication, V2X sidelink communication or sidelink discovery, if out of coverage on that frequency as defined in TS 36.304 [4, 11.4]:

2> perform a full search (i.e. covering all subframes and all possible SLSSIDs) to detect candidate SLSS, in accordance with TS 36.133 [16]

2> when evaluating the one or more detected SLSSIDs, apply layer 3 filtering as specified in 5.5.3.2 using the preconfigured filterCoefficient as defined in 9.3, before using the S-RSRP measurement results;

2> if the UE has selected a SyncRef UE:

3> if the S-RSRP of the strongest candidate SyncRef UE exceeds the minimum requirement TS 36.133 [16] by syncRefMinHyst and the strongest candidate SyncRef UE belongs to the same priority group as the current SyncRef UE and the S-RSRP of the strongest candidate SyncRef UE exceeds the S-RSRP of the current SyncRef UE by syncRefDiffHyst; or

3> if the S-RSRP of the candidate SyncRef UE exceeds the minimum requirement TS 36.133 [16] by syncRefMinHyst and the candidate SyncRef UE belongs to a higher priority group than the current SyncRef UE; or

3> if GNSS becomes reliable in accordance with TS 36.101 [42] and TS 36.133 [16], and GNSS belongs to a higher priority group than the current SyncRef UE; or

3> if the S-RSRP of the current SyncRef UE is less than the minimum requirement defined in TS 36.133 [16]:

4> consider no SyncRef UE to be selected;

2> if the UE has selected GNSS as the synchronization reference for V2X sidelink communication:

3> if the S-RSRP of the candidate SyncRef UE exceeds the minimum requirement defined in TS 36.133 [16] by syncRefMinHyst and the candidate SyncRef UE belongs to a higher priority group than GNSS; or

3> if GNSS becomes not reliable in accordance with TS 36.101 [42] and TS 36.133 [16]:

4> consider GNSS not to be selected;

2> if the UE has not selected a SyncRef UE and has not selected GNSS as synchronization reference source:

3> if not concerning V2X sidelink communication, and if the UE detects one or more SLSSIDs for which the S-RSRP exceeds the minimum requirement defined in TS 36.133 [16] by syncRefMinHyst and for which the UE received the corresponding MasterInformationBlock-SL message (candidate SyncRef UEs), select a SyncRef UE according to the following priority group order:

4> UEs of which inCoverage, included in the MasterInformationBlock-SL message received from this UE, is set to TRUE, starting with the UE with the highest S-RSRP result (priority group 1);

4> UEs of which SLSSID is part of the set defined for in coverage, starting with the UE with the highest S-RSRP result (priority group 2);

4> Other UEs, starting with the UE with the highest S-RSRP result (priority group 3);

3> for V2X sidelink communication, if the UE detects one or more SLSSIDs for which the S-RSRP exceeds the minimum requirement defined in TS 36.133 [16] by syncRefMinHyst and for which the UE received the corresponding MasterInformationBlock-SL-V2X message (candidate SyncRef UEs), or if the UE detects GNSS that is reliable in accordance with TS 36.101 [42] and TS 36.133 [16], select a synchronization reference according to the following priority group order:

4> if syncPriority corresponding to the concerned frequency in SL-V2X-Preconfiguration is set to enb:

5> UEs of which SLSSID is part of the set defined for in coverage, and inCoverage, included in the MasterInformationBlock-SL-V2X message received from this UE, is set to TRUE, starting with the UE with the highest S-RSRP result (priority group 1);

5> UE of which SLSSID is part of the set defined for in coverage, and inCoverage, included in the MasterInformationBlock-SL-V2X message received from this UE, is set to FALSE, starting with the UE with the highest S-RSRP result (priority group 2);

5> GNSS that is reliable in accordance with TS 36.101 [42] and TS 36.133 [16] (priority group 3);

5> UEs of which SLSSID is 0, and inCoverage, included in the MasterInformationBlock-SL-V2X message received from this UE, is set to TRUE, or of which SLSSID is 0 and SLSS is transmitted on subframes indicated by syncOffsetIndicator3, starting with the UE with the highest S-RSRP result (priority group 4);

5> UEs of which SLSSID is 0 and is not transmitted on subframes indicated by syncOffsetIndicator3, and inCoverage, included in the MasterInformationBlock-SL-V2X message received from this UE, is set to FALSE, starting with the UE with the highest S-RSRP result (priority group 5);

5> UEs of which SLSSID is 169, and inCoverage, included in the MasterInformationBlock-SL-V2X message received from this UE, is set to FALSE, starting with the UE with the highest S-RSRP result (priority group 5);

5> Other UEs, starting with the UE with the highest S-RSRP result (priority group 6);

4> if syncPriority corresponding to the concerned frequency in SL-V2X-Preconfiguration is set to gnss:

5> GNSS that is reliable in accordance with TS 36.101 [42] and TS 36.133 [16] (priority group 1);

5> UEs of which SLSSID is part of the set defined for in coverage, and inCoverage, included in the MasterInformationBlock-SL-V2X message received from this UE, is set to TRUE, starting with the UE with the highest S-RSRP result (priority group 2);

5> UEs of which SLSSID is 0, and inCoverage, included in the MasterInformationBlock-SL-V2X message received from this UE, is set to TRUE, or of which SLSSID is 0 and SLSS is transmitted on subframes indicated by syncOffsetIndicator3, starting with the UE with the highest S-RSRP result (priority group 2);

5> UE of which SLSSID is part of the set defined for in coverage, and inCoverage, included in the MasterInformationBlock-SL-V2X message received from this UE, is set to FALSE, starting with the UE with the highest S-RSRP result (priority group 3);

5> UEs of which SLSSID is 0 and is not transmitted on subframes indicated by syncOffsetIndicator3, and inCoverage, included in the MasterInformationBlock-SL-V2X message received from this UE, is set to FALSE, starting with the UE with the highest S-RSRP result (priority group 3);

5> UEs of which SLSSID is 169, and inCoverage, included in the MasterInformationBlock-SL-V2X message received from this UE, is set to FALSE, starting with the UE with the highest S-RSRP result (priority group 3);

5> Other UEs, starting with the UE with the highest S-RSRP result (priority group 4);

[TS 24.386, clause 6.1.2.3]

When the UE is not served by E-UTRAN for V2X communication, the UE shall select the radio parameters to be used for V2X communication over PC5 as follows:

– if the UE can determine itself located in a geographical area, and the UE is provisioned with radio parameters for the geographical area, the UE shall select the radio parameters associated with that geographical area; or

– in all other cases, the UE shall not initiate V2X communication over PC5.

It is out of scope of the present specification to define how the UE can locate itself in a specific geographical area. When the UE is in coverage of a 3GPP RAT it can for example use information derived from the serving PLMN. When the UE is not in coverage of a 3GPP RAT it can use other techniques, e.g. Global Navigation Satellite System (GNSS). The UE shall not consider user provided location as a valid input to locate itself in a specific geographical area.

24.1.18.3 Test description

24.1.18.3.1 Pre-test conditions

System Simulator:

SS-NW

– No E-UTRA cell configured

– 1 GNSS simulator

SS-UE

– SS-UE1: as defined in TS 36.508 [18], configured for and operating as V2X sidelink Communication transmitting and receiving device (as defined in TS 36.508 [18] clause 6.2.3.5), as well as, transmitting Synchronisation information on the resources which the UE is expected to use for transmission and reception.

– SS-UE2: as defined in TS 36.508 [18], configured for and operating as V2X sidelink Communication transmitting and receiving device (as defined in TS 36.508 [18] clause 6.2.3.5), as well as, transmitting Synchronisation information on the resources which the UE is expected to use for transmission and reception.

UE:

– V2X sidelink related configuration. The speed of the UE is 0 (i.e. the UE is not moving).

– The UE is authorised to perform V2X Sidelink Communication

– The UE is equipped with below information in UE or in a USIM with SL-V2X-Preconfiguration in UE or in a USIM (as in Table 24.1.18.3.3-1).

Table 24.1.18.3.1-1: UE/ USIM configuration

USIM field

Priority

Value

Access Technology Identifier

EFUST

Service n°119 (V2X) supported

EFVST

As per TS 36.508 [18] clause 4.9.3.4

EFV2X_CONFIG

SL-V2X-Preconfiguration field as defined in Table 24.1.18.3.3-1

Geographical area field as defined in TS 36.508 [18] clause 4.9.3.1.

Preamble:

– The UE is in state V2X out of coverage (State 5A-V2X) according to TS 36.508 [18] clause 4.5.7.

24.1.18.3.2 Test procedure sequence

Table 24.1.18.3.2-1 illustrates the sidelink power levels and other changing parameters to be applied for the SS-UE at various time instants of the test execution. Row marked "T0" denotes the initial conditions after preamble, while columns marked "T1" … "Tn" are to be applied subsequently. The exact instants on which these values shall be applied are described elsewhere in the present clause.

Table 24.1.18.3.2-1: Time instances of simulated SS-UE power level and parameter changes

Parameter

Unit

SS-UE1

SS-UE2

T0

S-RSRP

dBm/15kHz

"Off"

"Off"

T1

S-RSRP

dBm/15kHz

-79

-79

T2

S-RSRP

dBm/15kHz

-88

-88

T3

S-RSRP

dBm/15kHz

-93

-88

T4

S-RSRP

dBm/15kHz

"Off"

-88

T5

S-RSRP

dBm/15kHz

"Off"

"Off"

Table 24.1.18.3.2-2: Main behaviour

St

Procedure

Message Sequence

TP

Verdict

U – S

Message

0

Void

1

SS configures:

GNSS simulator is configured for Scenario #1: Scenario #1: static in Geographical area #1, and starts step 1 to simulate a location in the centre of Geographical area #1 as defined in TS 36.508 [18] Table 4.11.2-2. Geographical area #1 is also pre-configured in the UE/USIM.

–

–

2

SS configures:

SS-UE1 and SS-UE2 in accordance with "T1" defined in Table 24.1.18.3.2-1.

SS-UE1 continuously transmits SLSS and MasterInformationBlock-SL-V2X message in the same subframe as the SLSS. SLSS-ID is set to 101, syncOffsetIndicator is set to syncOffsetIndicator1.

inCoverage in the MasterInformationBlock-SL-V2X message set to TRUE.

SS-UE2 continuously transmits SLSS and MasterInformationBlock-SL-V2X message in the same subframe as the SLSS. SLSS-ID is set to 50, syncOffsetIndicator is set to syncOffsetIndicator2

inCoverage in the MasterInformationBlock-SL-V2X message set to FALSE.

Note 1: The power levels of the SS-UE1 and SS-UE2 are set so that upon S-RSRP measurement by the UE the result is NOT below the value of syncTxThreshOoC (SL-V2X-Preconfiguration).

Note 2: SS-UE1 and SS-UE2 are synchronised to UTC time from the GNSS simulator.

<–

SLSS

MasterInformationBlock-SL-V2X

–

–

3

Check: Does the UE transmit SLSS and MasterInformationBlock-SL-V2X message during transmission of 10 STCH packets?

NOTE: Although the UE is expected to transmit continuously, only the STCH PDCP SDU packets which need to be checked are shown explicitly in the step sequence.

–>

SLSS

MasterInformationBlock-SL-V2X

2

F

4

SS configures:

SS-UE1 and SS-UE2 in accordance with "T2" defined in Table 24.1.18.3.2-1.

No changes to the SLSS and MasterInformationBlock-SL-V2X message

Note: The power levels of the SS-UE1 and SS-UE2 are set so that upon S-RSRP measurement by the UE the result is below the value of syncTxThreshOoC (SL-V2X-Preconfiguration).

<–

SLSS

MasterInformationBlock-SL-V2X

–

–

–

EXCEPTION: Steps 5 – 6 is repeated 3 times.

–

–

–

–

5

Check: Does the UE transmit SLSS?

UE shall synchronise to SS-UE1 and:

– select the same SLSSID of SS-UE1;

– select the subframe in which to transmit the SLSS according to the syncOffsetIndicator2 included in the preconfigured sidelink parameters (i.e. v2x-CommPreconfigSync-r14 in SL-V2X-Preconfiguration defined in Table 24.1.18.3.3-1), such that the subframe timing is different from the SLSS of the selected SyncRef UE.

–>

SLSS

2

P

6

Check: Does the UE transmit MasterInformationBlock-SL-V2X message in the same subframe as the SLSS in step 5?

–>

MasterInformationBlock-SL-V2X

2

P

7

SS configures:

Changes SLSSID of SS-UE1 to 0.

–

–

–

EXCEPTION: Steps 8 – 9 is repeated 3 times.

–

–

–

–

8

Check: Does the UE transmit SLSS?

UE shall synchronise to SS-UE2 and:

– select the same SLSSID of SS-UE2;

– select the subframe in which to transmit the SLSS according to the syncOffsetIndicator1 included in the preconfigured sidelink parameters (i.e. v2x-CommPreconfigSync-r14 in SL-V2X-Preconfiguration defined in Table 24.1.18.3.3-1), such that the subframe timing is different from the SLSS of the selected SyncRef UE.

–>

SLSS

2

P

9

Check: Does the UE transmit MasterInformationBlock-SL-V2X message in the same subframe as the SLSS in step 8?

–>

MasterInformationBlock-SL-V2X

3

P

10

SS configures:

Changes SLSSID of SS-UE2 to 0.

<–

SLSS

MasterInformationBlock-SL-V2X

–

–

–

EXCEPTION: Steps 11 – 12 is repeated 3 times.

–

–

–

–

11

Check: Does the UE transmit SLSS?

UE shall synchronise to GNSS and:

– select the SLSSID = 0;

– select the subframe in which to transmit the SLSS according to the syncOffsetIndicator3 included in the preconfigured sidelink parameters (i.e. v2x-CommPreconfigSync-r14 in SL-V2X-Preconfiguration defined in Table 24.1.18.3.3-1).

–>

SLSS

1,3

P

12

Check: Does the UE transmit MasterInformationBlock-SL-V2X message in the same subframe as the SLSS in step 11?

–>

MasterInformationBlock-SL-V2X

1,3

P

13

SS-NW stops transmitting GNSS RF signals.

–

–

–

–

–

EXCEPTION: Steps 14 – 15 is repeated 3 times.

–

–

–

–

14

Check: Does the UE transmit SLSS?

UE shall synchronise to SS-UE1 and:

– select the SLSSID = 0;

– select the subframe in which to transmit the SLSS according to the syncOffsetIndicator2 included in the preconfigured sidelink parameters (i.e. v2x-CommPreconfigSync-r14 in SL-V2X-Preconfiguration defined in Table 24.1.18.3.3-1), such that the subframe timing is different from the SLSS of the selected SyncRef UE.

–>

SLSS

3

P

15

Check: Does the UE transmit MasterInformationBlock-SL-V2X message in the same subframe as the SLSS in step 14?

–>

MasterInformationBlock-SL-V2X

3

P

16

SS configures:

Changes the SLSS transmission subframes of SS-UE1 to the subframes indicated by syncOffsetIndicator3.

<–

SLSS

MasterInformationBlock-SL-V2X

–

–

–

EXCEPTION: Steps 17 – 18 is repeated 3 times.

–

–

–

–

17

Check: Does the UE transmit SLSS?

UE shall synchronise to SS-UE1 and:

– select the SLSSID = 169;

– select the subframe in which to transmit the SLSS according to the syncOffsetIndicator2 included in the preconfigured sidelink parameters (i.e. v2x-CommPreconfigSync-r14 in SL-V2X-Preconfiguration defined in Table 24.1.18.3.3-1).

–>

SLSS

3

P

18

Check: Does the UE transmit MasterInformationBlock-SL-V2X message in the same subframe as the SLSS in step 17?

–>

MasterInformationBlock-SL-V2X

3

P

19

SS configures:

Changes the SLSSID of SS-UE1 to 169.

Changes the SLSS transmission subframes of SS-UE1 to the subframes indicated by syncOffsetIndicator1.

SS-UE1 and SS-UE2 in accordance with "T3" defined in Table 24.1.18.3.2-1.

<–

SLSS

MasterInformationBlock-SL-V2X

–

–

–

EXCEPTION: Steps 20 – 21 is repeated 3 times.

–

–

–

–

20

Check: Does the UE transmit SLSS?

UE shall synchronise to SS-UE2 and:

– select the SLSSID = 168(SLSSID of SS-UE2 +168);

– select the subframe in which to transmit the SLSS according to the syncOffsetIndicator1 included in the preconfigured sidelink parameters (i.e. v2x-CommPreconfigSync-r14 in SL-V2X-Preconfiguration defined in Table 24.1.18.3.3-1) , such that the subframe timing is different from the SLSS of the selected SyncRef UE.

–>

SLSS

3

P

21

Check: Does the UE transmit MasterInformationBlock-SL-V2X message in the same subframe as the SLSS in step 20?

–>

MasterInformationBlock-SL-V2X

3

P

22

SS configures:

Changes the SLSSID of SS-UE2 to 200.

<–

SLSS

MasterInformationBlock-SL-V2X

–

–

–

EXCEPTION: Steps 23 – 24 is repeated 3 times.

–

–

–

–

23

Check: Does the UE transmit SLSS?

UE shall synchronise to SS-UE1 and:

– select the SLSSID = 169(SLSSID of SS-UE1);

– select the subframe in which to transmit the SLSS according to the syncOffsetIndicator2 included in the preconfigured sidelink parameters (i.e. v2x-CommPreconfigSync-r14 in SL-V2X-Preconfiguration defined in Table 24.1.18.3.3-1) , such that the subframe timing is different from the SLSS of the selected SyncRef UE.

–>

SLSS

3

P

24

Check: Does the UE transmit MasterInformationBlock-SL-V2X message in the same subframe as the SLSS in step 23?

–>

MasterInformationBlock-SL-V2X

3

P

25

SS configures:

SS-UE1 and SS-UE2 in accordance with "T4" defined in Table 24.1.18.3.2-1.

–

–

–

EXCEPTION: Steps 26 – 27 is repeated 3 times.

–

–

–

–

26

Check: Does the UE transmit SLSS?

UE shall synchronise to SS-UE2 and:

– select the SLSSID = 200 (SLSSID of SS-UE2);

– select the subframe in which to transmit the SLSS according to the syncOffsetIndicator1 included in the preconfigured sidelink parameters (i.e. v2x-CommPreconfigSync-r14 in SL-V2X-Preconfiguration defined in Table 24.1.18.3.3-1) , such that the subframe timing is different from the SLSS of the selected SyncRef UE.

–>

SLSS

3

P

27

Check: Does the UE transmit MasterInformationBlock-SL-V2X message in the same subframe as the SLSS in step 26?

–>

MasterInformationBlock-SL-V2X

3

P

28

SS configures:

SS-UE1 and SS-UE2 in accordance with "T5" defined in Table 24.1.18.3.2-1.

–

–

–

–

–

EXCEPTION: Steps 29 – 30 is repeated 3 times.

–

–

–

–

29

Check: Does the UE transmit SLSS?

UE shall no SyncRef UE selected:

– select the SLSSID randomly in the range [170..335];

– select the subframe in which to transmit the SLSS according to the syncOffsetIndicator1 or syncOffsetIndicator2 included in the preconfigured sidelink parameters (i.e. v2x-CommPreconfigSync-r14 in SL-V2X-Preconfiguration defined in Table 24.1.18.3.3-1).

–>

SLSS

4

P

30

Check: Does the UE transmit MasterInformationBlock-SL-V2X message in the same subframe as the SLSS in step 29?

–>

MasterInformationBlock-SL-V2X

4

P

31

Trigger UE to open UE test loop mode E.

NOTE: The UE deactivation of UE test loop mode E may be opened by MMI or AT command (+CCUTLE ).

–

–

–

–

32

Trigger UE to deactivate UE test loop mode.

NOTE: The deactivation of test loop mode may be performed by MMI or AT command (+CATM ).

–

–

–

–

24.1.18.3.3 Specific message contents

Table 24.1.18.3.3-1: SL-V2X-Preconfiguration

Derivation Path: 36.508 [18], table 6.8.2.1-1

Information Element

Value/remark

Comment

Condition

SL-V2X-Preconfiguration-r14 ::= SEQUENCE {

v2x-PreconfigFreqList-r14 SEQUENCE (SIZE (1..maxFreqV2X-r14)) OF SL-V2X-PreconfigFreqInfo-r14 SEQUENCE {

SL-V2X-PreconfigFreqInfo-r14[1] SEQUENCE {

v2x-CommPreconfigSync-r14 SEQUENCE {

SL-PreconfigSync-r14

syncOffsetIndicators-r14 SEQUENCE {

syncOffsetIndicator1-r14

0

syncOffsetIndicator2-r14

1

syncOffsetIndicator3-r14

2

}

syncTxParameters-r14

23

P0-SL-r12

syncTxThreshOoC-r14

5

-85dBm/15kHz

filterCoefficient-r14

fc0

syncRefMinHyst-r14

dB0

syncRefDiffHyst-r14

dB0

}

syncPriority-r14

enb

}

}

}

Table 24.1.18.3.3-2: MasterInformationBlock-SL-V2X (steps 6, 9, 12, 15, 18, 21, 24, 27, 30, Table 24.1.18.3.2-2)

Derivation Path: 36.508 [18], table 4.6.1-4A1

Information Element

Value/remark

Comment

Condition

MasterInformationBlock-SL-V2X-r14 ::= SEQUENCE {

inCoverage-r14

FALSE

UE is out of E-UTRAN coverage

}