Study on Port Allocation Alternatives for New 3GPP Interfaces
The present document studies alternative proposals for the port number allocations to the new 3GPP interfaces and applications. The study will focus on, but is not limited to following three alternatives:
- 3GPP allocating port numbers from the Dynamic/Private Port number range [49152 - 65535]. See clause 6 in IETF RFC 6335 [2];
- Operators allocating port numbers from either the User Port number range [1024-49151] or the Dynamic/Private Port number range [49152 - 65535]. See clause 6 in IETF RFC 6335 [2];
- DNS based solution, where port numbers are allocated from the User Port number range [1024-49151] or the Dynamic/Private Port number range [49152 - 65535]. See clause 6 in IETF RFC 6335 [2].
The primary focus of this study is on protocols only used for network internal services, i.e. when the protocol is only used in a single network with no interconnection with other networks or the public Internet. The solutions proposed in the study however could also be used in scenarios in which the protocol is used across multiple networks, e.g. in roaming case or between the RAN and the core network supported by different operator networks.