8.2.208 MBSN4mbReq-Flags
29.2443GPPInterface between the Control Plane and the User Plane nodesRelease 17TS
The MBSN4mbReq-Flags IE indicates flags applicable to the PFCP Session Establishment Request. It is coded as depicted in Figure 8.2.208-1.
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Bits |
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Octets |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
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1 to 2 |
Type = 307 (decimal) |
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3 to 4 |
Length = n |
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5 |
Spare |
MBS RESTI |
JMBSSM |
PLLSSM |
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6 to (n+4) |
These octet(s) is/are present only if explicitly specified |
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Figure 8.2.208-1: MBSN4mbReq-Flags
The following bits within Octet 5 shall indicate:
– Bit 1 – PLLSSM (Provide Lower Layer SSM): if this bit is set to "1", it indicates that the MB-UPF shall allocate a lower layer SSM (i.e. multicast destination address and related source IP address) and a GTP-U Common Tunnel EndPoint Identifier (C-TEID) in the Multicast Transport Address IE. See clause 5.34.2.2.
– Bit 2 – JMBSSM (Join MBS Session SSM): if this bit is set to "1", it indicates that the MB-UPF shall join the multicast tree towards the Source Specific Multicast (SSM) address information provided by AF/AS or MBSTF for the MBS Session.
– Bit 3 – MBS RESTI (MBS Restoration Indication): if this bit is set to "1", it indicates to the MB-UPF that the PFCP session to be established is to restore an existing PFCP session of an MBS session.
– Bit 4 to 8 – Spare, for future use, shall be set to "0" by the sender and discarded by the receiver.