U – S

Message/PDU/SDU

–

EXCEPTION: Step 1a1 to 1b12a1 describe behaviour that depends on the UE capability the “lower case letter” identifies a step sequence that take place.

–

–

–

–

1a1

IF pc_Join_MBS_by_PDU_Modification THEN cause the UE to request establishment of associated PDU Session to the MBS DNN.(Note 1)

–

–

–

–

1a2-1a7

Steps 2-7 of expected sequence from Table 4.5.4.2-3 are performed.

–

–

–

–

–

EXCEPTION: Depending upon UE implementation, steps 1a8 and 1a9 can occur in any order

–

–

–

–

1a8

The UE transmits an RRCReconfigurationComplete message.

–>

NR RRC: RRCReconfigurationComplete

–

–

1a9

The UE transmits an UL NAS TRANSPORT message and a PDU SESSION ESTABLISHMENT REQUEST without MBS session ID and join request.

–>

NR RRC: ULInformationTransfer

5GMM: UL NAS TRANSPORT

5GSM: PDU SESSION ESTABLISHMENT REQUEST

–

P

1a10

The SS transmits an RRCReconfiguration message and an PDU SESSION ESTABLISHMENT ACCEPT

<–

NR RRC: RRCReconfiguration

5GMM: DL NAS TRANSPORT

5GSM: PDU SESSION ESTABLISHMENT ACCEPT

–

–

1a11

The UE transmits an RRCReconfigurationComplete message.

–>

NR RRC: RRCReconfigurationComplete

–

–

–

EXCEPTION: Step 1a12a1 describes behaviour depending UE implementation; the "lower case letter" identifies a step sequence that take place if the UE performs a specific action.

–

–

–

1a12a1

IF the ‘IP address allocation’ for the DNN for which the PDU session is established is set to "Yes" in Table 4.8.4-1 THEN, the generic procedure for IP address allocation in the user plane, specified in subclause 4.5A.3, takes place performing IP address allocation in the user plane.

–

–

–

–

1a13

Trigger UE to join MBS Multicast session.

–

–

–

–

1a14

The UE transmits an ULInformationTransfer message and a PDU SESSION MODIFICATION REQUEST message including MBS session ID and join request.

–>

NR RRC: ULInformationTransfer

5GMM: UL NAS TRANSPORT

5GSM: PDU SESSION MODIFICATION REQUEST

–

P

1a15

The SS transmits an RRCReconfiguration message and a PDU SESSION MODIFICATION COMMAND.

<–

NR RRC: RRCReconfiguration

5GMM: DL NAS TRANSPORT

5GSM: PDU SESSION MODIFICATION COMMAND

–

–

–

EXCEPTION: Depending upon UE implementation, steps 1a16 and 1a17can occur in any order.

–

–

–

–

1a16

The UE transmits an RRCReconfigurationComplete message.

–>

NR RRC: RRCReconfigurationComplete

–

–

1a17

The UE transmits an ULInformationTransfer message and a PDU SESSION MODIFICATION COMPLETE message.

–>

NR RRC: ULInformationTransfer

5GMM: UL NAS TRANSPORT

5GSM: PDU SESSION MODIFICATION COMPLETE

–

P

1b1

ELSE trigger UE to join MBS Multicast session.

–

–

–

–

1b2-1b7

Steps 2-7 of expected sequence from Table 4.5.4.2-3 are performed.

–

–

–

–

–

EXCEPTION: Depending upon UE implementation, steps 1b8 and 1b9 can occur in any order

–

–

–

–

1b8

The UE transmits an RRCReconfigurationComplete message.

–>

NR RRC: RRCReconfigurationComplete

–

–

1b9

The UE transmits an UL NAS TRANSPORT message and a PDU SESSION ESTABLISHMENT REQUEST including MBS session ID and join request.

–>

NR RRC: ULInformationTransfer

5GMM: UL NAS TRANSPORT

5GSM: PDU SESSION ESTABLISHMENT REQUEST

–

P

1b10

The SS transmits an RRCReconfiguration message and a PDU SESSION ESTABLISHMENT ACCEPT

<–

NR RRC: RRCReconfiguration

5GMM: DL NAS TRANSPORT

5GSM: PDU SESSION ESTABLISHMENT ACCEPT

–

–

1b11

The UE transmits an RRCReconfigurationComplete message.

–>

NR RRC: RRCReconfigurationComplete

–

–

–

EXCEPTION: Step 1b12a1 describes behaviour depending UE implementation; the "lower case letter" identifies a step sequence that take place if the UE performs a specific action.

–

–

–

–

1b12a1

IF the ‘IP address allocation’ for the DNN for which the PDU session is established is set to "Yes" in Table 4.8.4-1 THEN, the generic procedure for IP address allocation in the user plane, specified in subclause 4.5A.3, takes place performing IP address allocation in the user plane.

–

–

–

–

Information Element

Value/remark

Comment

Condition

Requested MBS container

Not present

Information Element

Value/remark

Comment

Condition

Requested MBS container

MBS session information

MBS operation

‘01’B

Join MBS session

Type of MBS session ID

Not checked

MBS session ID

Present but value not checked, the value is set according to the parameter given in the test case

Information Element

Value/remark

Comment

Condition

Received MBS container

Received MBS information

Rejection cause

‘000’B

No additional information provided

MSAI

‘00’B

MBS service area not included

MD

‘010’B

MBS join is accepted

MSCI

‘0’B

MBS security container not included

MTI

‘00’B

No MBS timers included

IPAE

‘0’B

Source and destination IP address information not included

TMGI

MBMS Service ID

‘000001’B

MCC

See table 4.4.2-3

MNC

See table 4.4.2-3

Source IP address information

Not present

Destination IP address information

Not present

MBS service area

Not present

MBS timers

Not present

MBS security container

Not present

Information Element

Value/remark

Comment

Condition

Requested MBS container

MBS session information

MBS operation

‘01’B

Join MBS session

Type of MBS session ID

Not checked

MBS session ID

Present but value not checked, the value is set according to the parameter given in the test case.

Information Element

Value/remark

Comment

Condition

Received MBS container

Received MBS information

Rejection cause

‘000’B

No additional information provided

MSAI

‘00’B

MBS service area not included

MD

‘010’B

MBS join is accepted

MSCI

‘0’B

MBS security container not included

MTI

‘00’B

No MBS timers included

IPAE

‘0’B

Source and destination IP address information not included

TMGI

MBMS Service ID

‘000001’B

MCC

See table 4.4.2-3

MNC

See table 4.4.2-3

Source IP address information

Not present

Destination IP address information

Not present

MBS service area

Not present

MBS timers

Not present

MBS security container

Not present