8.2.2 Source Interface
29.2443GPPInterface between the Control Plane and the User Plane nodesRelease 17TS
The Source Interface IE type shall be encoded as shown in Figure 8.2.2-1. It indicates the type of the interface from which an incoming packet is received.
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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 = 20 (decimal) |
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3 to 4 |
Length = n |
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5 |
Spare |
Interface value |
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6 to (n+4) |
These octet(s) is/are present only if explicitly specified |
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Figure 8.2.2-1: Source Interface
The Interface value shall be encoded as a 4 bits binary integer as specified in in Table 8.2.2-1.
Table 8.2.2-1: Interface value
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Interface value |
Values (Decimal) |
|
Access |
0 |
|
Core |
1 |
|
SGi-LAN/N6-LAN |
2 |
|
CP-function |
3 |
|
5G VN Internal |
4 |
|
Spare |
5 to 15 |
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NOTE 1: The "Access" and "Core" values denote an uplink and downlink traffic direction respectively. NOTE 2: For indirect data forwarding, the Source Interface in the PDR and the Destination Interface in the FAR shall both be set to "Access", in the forwarding SGW(s). The Interface value does not infer any traffic direction, in PDRs and FARs set up for indirect data forwarding, i.e. with both the Source and Destination Interfaces set to Access. |
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