8.2.209 Local Ingress Tunnel
29.2443GPPInterface between the Control Plane and the User Plane nodesRelease 17TS
The Local Ingress Tunnel IE type shall be encoded as shown in Figure 8.2.209-1. It indicates a UDP/IP tunnel.
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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 = 308 (decimal) |
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3 to 4 |
Length = n |
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5 |
Spare |
CH |
V6 |
V4 |
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6-7 |
UDP Port |
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m to (m+3) |
IPv4 address |
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p to (p+15) |
IPv6 address |
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k to (n+4) |
These octet(s) is/are present only if explicitly specified |
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Figure 8.2.209-1: Local Ingress Tunnel
The following flags are coded within Octet 5:
– Bit 1 – V4: If this bit is set to "1" and the CH bit is not set, then the IPv4 address field shall be present, otherwise the IPv4 address field shall not be present.
– Bit 2 – V6: If this bit is set to "1" and the CH bit is not set, then the IPv6 address field shall be present, otherwise the IPv6 address field shall not be present.
– Bit 3 – CH (CHOOSE): If this bit is set to "1", then the UDP Port, IPv4 address and IPv6 address fields shall not be present and the UP function shall assign a UDP Port with an IP4 or an IPv6 address if the V4 or V6 bit is set respectively. This bit shall only be set by the CP function.
– Bit 4 to 8: Spare, for future use and set to "0".
Only one of the V4 and V6 flags shall be set to "1".
Octets "m to (m+3)" and/or "p to (p+15)" (IPv4 address / IPv6 address fields), if present, it shall contain the respective IP address values.