13.2 RRC connection reconfiguration

36.523-13GPPEvolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Packet Core (EPC)Part 1: Protocol conformance specificationRelease 16TSUser Equipment (UE) conformance specification

13.2.1 RRC connection reconfiguration / E-UTRA to E-UTRA

13.2.1.1 Test Purpose (TP)

(1)

with { UE has a default EPS bearer context }

ensure that {

when { UE receives downlink data on the radio bearer associated with the default EPS bearer context }

then { UE delivers the downlink data to upper layers }

}

(2)

with { UE has a default EPS bearer context }

ensure that {

when { uplink data are submitted for transmission }

then { UE transmits the uplink data on the radio bearer associated with the default EPS bearer context }

}

(3)

with { UE has a default EPS bearer context and successful completion of the intra-frequency handover }

ensure that {

when { UE receives downlink data on the radio bearer associated with the default EPS bearer context }

then { UE delivers the downlink data to upper layers }

}

(4)

with { UE has a default EPS bearer context and successful completion of the intra-frequency handover }

ensure that {

when { uplink data are submitted for transmission }

then { UE transmits the uplink data on the radio bearer associated with the default EPS bearer context }

}

13.2.1.2 Conformance requirements

Same Conformance requirements as in clause 8.2.4.2.

References: The conformance requirements covered in the present TC are specified in: TS23.401, clause 5.5.1.1.1.

[TS 23.401, clause 5.5.1.1.1]

These procedures are used to hand over a UE from a source eNodeB to a target eNodeB using the X2 reference point. In these procedures the MME is unchanged. Two procedures are defined depending on whether the Serving GW is unchanged or is relocated. In addition to the X2 reference point between the source and target eNodeB, the procedures rely on the presence of S1-MME reference point between the MME and the source eNodeB as well as between the MME and the target eNodeB.

The handover preparation and execution phases are performed as specified in TS 36.300 [5].

If the serving PLMN changes during handover, the source eNB shall initiate an S1-based handover instead of an X2-based handover.

When the UE receives the handover command it will remove any EPS bearers for which it did not receive the corresponding EPS radio bearers in the target cell. As part of handover execution, downlink packets are forwarded from the source eNodeB to the target eNodeB. When the UE has arrived to the target eNodeB, downlink data forwarded from the source eNodeB can be sent to it. Uplink data from the UE can be delivered via the (source) Serving GW to the PDN GW. Only the handover completion phase is affected by a potential change of the Serving GW, the handover preparation and execution phases are identical.

If the MME receives a rejection to a NAS procedure (e.g. dedicated bearer establishment/modification/release; location reporting control; NAS message transfer; etc.) from the eNodeB with an indication that an X2 handover is in progress (see TS 36.300 [5]), the MME shall reattempt the same NAS procedure either when the handover is complete or the handover is deemed to have failed. The failure is known by expiry of the timer guarding the NAS procedure.

13.2.1.3 Test description

13.2.1.3.1 Pre-test conditions

System Simulator:

  • Cell 1 and Cell 2

UE:

None.

Preamble:

– The UE is in state Loopback Activated (state 4) on Cell 1 according to [18] using the UE TEST LOOP MODE B.

13.2.1.3.2 Test procedure sequence

Table 13.2.1.3.2-1 illustrates the downlink power levels and other changing parameters to be applied for the cells at various time instants of the test execution. 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 the texts in this clause.

Table 13.2.1.3.2-1: Time instances of cell power level and parameter changes

Parameter

Unit

Cell 1

Cell 2

Remark

T0

Cell-specific RS EPRE

dBm/15kHz

-85

-91

The power level value shall be such that measurement results for Cell 1 (M1) and Cell 2 (M2) satisfy exit condition for event A3 (M2 + Hys < M1).

T1

Cell-specific RS EPRE

dBm/15kHz

-91

-85

The power level value shall be such that measurement results for Cell 1 (M1) and Cell 2 (M2) satisfy entry condition for event A3 (M2 – Hys > M1).

Table 13.2.1.3.2-2: Main behaviour

St

Procedure

Message Sequence

TP

Verdict

U – S

Message

1

The SS transmits one IP packet to the UE on the DRB associated with the default EPS bearer context on Cell 1.

<–

IP packet

2

Check: Does the UE loop back the IP packet on the DRB associated with the default EPS bearer context on Cell 1?

1,2

P

3

The SS transmits an RRCConnectionReconfiguration message on Cell 1 to setup intra frequency measurement.

<–

RRCConnectionReconfiguration

4

The UE transmits an RRCConnectionReconfigurationComplete message on Cell 1.

–>

RRCConnectionReconfigurationComplete

5

The SS changes Cell 1 and Cell 2 parameters according to the row "T1" in table 13.2.1.3.2-1

6

The UE transmits a MeasurementReport message on Cell 1 to report event A3 with the measured RSRP and RSRQ value for Cell 2.

–>

MeasurementReport

7

The SS transmits an RRCConnectionReconfiguration message on Cell 1 to order the UE to perform intra frequency handover to Cell 2.

<–

RRCConnectionReconfiguration

8

The UE transmits an RRCConnectionReconfigurationComplete message on Cell 2 to confirm the successful completion of the intra frequency handover.

–>

RRCConnectionReconfigurationComplete

9

The SS transmits one IP packet to the UE on the DRB associated with the default EPS bearer context on Cell 2.

<–

IP packet

10

Check: Does the UE loop back the IP packet on the DRB associated with the default EPS bearer context on Cell 2?

3,4

P

13.2.1.3.3 Specific message contents

Table 13.2.1.3.3-1: ACTIVATE TEST MODE (preamble)

Derivation Path: 36.508, Table 4.7A-1, condition UE TEST LOOP MODE B

Table 13.2.1.3.3-2: RRCConnectionReconfiguration (Step 3, Table 13.2.1.3.2-2)

Derivation Path: 36.508 clause 4.6.1 table 4.6.1-8 with condition MEAS

Table 13.2.1.3.3-3: MeasurementConfiguration (Step 3, Table 13.2.1.3.2-2)

Derivation path: 36.508 clause 4.6.6 table 4.6.6-1

Information Element

Value/Remark

Comment

Condition

measurementConfiguration ::= SEQUENCE {

measObjectToAddModifyList SEQUENCE (SIZE (1..maxObjectId)) OF SEQUENCE {

1 entry

measObjectId[1]

IdMeasObject-f1

measObject[1]

MeasObjectEUTRA-GENERIC(f1)

measObject[1]

MeasObjectEUTRA-GENERIC(maxEARFCN)

Band > 64

}

reportConfigToAddModifyList SEQUENCE (SIZE (1..maxReportConfigId)) OF SEQUENCE {

1 entry

reportConfigId[1]

IdReportConfig-A3

reportConfig[1]

ReportConfig-A3

}

measIdToAddModifyList SEQUENCE (SIZE (1..maxMeasId)) OF SEQUENCE {

1 entry

measId[1]

1

measObjectId[1]

IdMeasObject-f1

reportConfigId[1]

IdReportConfig-A3

}

measGapConfig

MeasGapConfig-CE

intraFreq-CE-NeedForGaps

measObjectToAddModList-v9e0 ::= SEQUENCE (SIZE (1..maxObjectId)) OF {

Band > 64

measObjectEUTRA-v9e0[1] SEQUENCE {

carrierFreq-v9e0

Same downlink EARFCN as used for f1

}

}

Condition

Explanation

Band > 64

If band > 64 is selected

intraFreq-CE-NeedForGaps

For UE having set pc_intraFreq-CE-Need ForGaps to TRUE.

Table 13.2.1.3.3-4: MeasurementReport (Step 6, Table 13.2.1.3.2-2)

Derivation Path: 36.508, Table 4.6.1-5

Information Element

Value/remark

Comment

Condition

MeasurementReport ::= SEQUENCE {

criticalExtensions CHOICE {

c1 CHOICE{

measurementReport-r8 SEQUENCE {

measResults SEQUENCE {

measId

1

measResultServCell SEQUENCE {

rsrpResult

(0..97)

rsrqResult

(0..34)

}

measResultNeighCells CHOICE {

measResultListEUTRA SEQUENCE (SIZE (1..maxCellReport)) OF SEQUENCE {

1 entry

physCellId[1]

PhysicalCellIdentity of Cell 2

cgi-Info[1]

Not present

measResult[1] SEQUENCE {

rsrpResult

(0..97)

rsrqResult

(0..34)

}

}

}

}

}

}

}

}

Table 13.2.1.3.3-5: RRCConnectionReconfiguration (Step 7, Table 13.2.1.3.2-2)

Derivation Path: 36.508, Table 4.6.1-8, condition HO

Information Element

Value/Remark

Comment

Condition

RRCConnectionReconfiguration ::= SEQUENCE {

criticalExtensions CHOICE {

c1 CHOICE {

rrcConnectionReconfiguration-r8 SEQUENCE {

mobilityControlInfo

MobilityControlInfo

nonCriticalExtension ::= SEQUENCE {

CEmodeA

CEmodeB

lateNonCriticalExtension

Not present

nonCriticalExtension ::= SEQUENCE {

otherConfig-r9

Not present

fullConfig-r9

Not present

nonCriticalExtension ::= SEQUENCE {

sCellToReleaseList-r10

Not present

sCellToAddModList-r10

Not present

nonCriticalExtension ::= SEQUENCE {

systemInformationBlockType1Dedicated-r11

SystemInformationBlockType1-BR-r13 of Cell 2

nonCriticalExtension

Not present

}

}

}

}

}

}

}

}

Table 13.2.1.3.3-6: MobilityControlInfo (step 7, Table 13.2.1.3.2-2)

Derivation Path: 36.508 clause 4.6.5-1

Information Element

Value/remark

Comment

Condition

MobilityControlInfo ::= SEQUENCE {

targetPhysCellId

PhysicalCellIdentity of Cell 2

carrierFreq

Not present

}

}