name: IANA
full_form: Internet Assigned Numbers Authority
context: SCTP (IETF RFC 4960 [5]) shall be supported as the transport layer of F1-C signalling bearer. The Payload Protocol Identifier (ppid) assigned by IANA to be used by SCTP for the application layer protocol F1AP is 62, and 68 for DTLS over SCTP (IETF RFC 6083 [9]). The byte order of the ppid shall be big-endian. SCTP refers to the Stream Control Transmission Protocol developed by the Sigtran working group of the IETF for the purpose of transporting various signalling protocols over IP network. The gNB-DU and gNB-CU shall support a configuration with a single SCTP association per gNB-DU/gNB-CU pair. Configurations with multiple SCTP endpoints per gNB-DU/gNB-CU pair should be supported. When configurations with multiple SCTP associations are supported, the gNB-CU/gNB-DU may request to dynamically add/remove SCTP associations between the gNB-DU/gNB-CU pair. The gNB-DU shall establish the SCTP association. The SCTP Destination Port number value assigned by IANA to be used for F1AP is 38472.
description: The Internet Assigned Numbers Authority (IANA) is an organization responsible for coordinating the global DNS, IP addressing, and other internet protocol resources. In the context of 3GPP specifications, IANA assigns values such as Payload Protocol Identifiers (ppid) and port numbers for use in telecommunications protocols like SCTP.
explanation: The text describes IANA as an organization that manages and allocates identifiers crucial for internet protocols, including those used in telecommunications standards like SCTP. This clearly places IANA within the category of an organization.
section_title: 7Transport layer
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