8.2.38 Node ID
29.2443GPPInterface between the Control Plane and the User Plane nodesRelease 17TS
The Node ID IE shall contain an FQDN or an IPv4/IPv6 address. It shall be encoded as shown in Figure 8.2.38-1.
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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 = 60 (decimal) |
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3 to 4 |
Length = n |
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|
5 |
Spare |
Node ID Type |
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6 to o |
Node ID value |
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|
m to (n+4) |
These octet(s) is/are present only if explicitly specified |
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Figure 8.2.38-1: Node ID
Node ID Type indicates the type of the Node ID value. It shall be encoded as a 4 bits binary integer as specified in Table8.2.38-2.
Table 8.2.38-2: Node ID Type
|
Node ID Type Value (Decimal) |
Node ID Type |
|
0 |
IPv4 address |
|
1 |
IPv6 address |
|
2 |
FQDN |
|
3 to 15 |
Spare, for future use. |
If the Node ID Type is set to an IPv4 address, then the Node ID value length shall be 4 Octets.
If the Node ID Type is set to an IPv6 address, then the Node ID value length shall be 16 Octets.
If the Node ID Type is set to an FQDN, then the Node ID value encoding shall be identical to the encoding of a FQDN within a DNS message of clause 3.1 of IETF RFC 1035 [27] but excluding the trailing zero byte.
NOTE 1: The FQDN field in the IE is not encoded as a dotted string as commonly used in DNS master zone files.