Content for TS 29.674 Word version: 18.0.0

3.1 Terms 3.2 Symbols 3.3 Abbreviations 4.1 Introduction 4.2 UDP Header and Port Numbers 4.3 IP Header and IP Addresses
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1 Scope p. 6

The present document specifies the UE Radio Capability Management Protocol used on the interface between the MME and UCMF as specified in TS 23.401. In the related stage 2 specifications the prefix S17 is used for these common procedures realised by URCMP.

2 References p. 6

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.

References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.

[1]

TR 21.905: "Vocabulary for 3GPP Specifications".

[2]

TS 23.401: "General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access".

[3]

RFC 768: "User Datagram Protocol".

[4]

RFC 791: "INTERNET PROTOCOL".

[5]

RFC 8200: "Internet Protocol, Version 6 (Ipv6) Specification".

[6]

TS 23.003: "Numbering, addressing and identification".

[7]

TS 24.301: "Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3".

[8]

TS 36.413: "Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 Application Protocol (S1AP)".

[9]

TS 29.274: "3GPP Evolved Packet System (EPS); Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C); Stage 3".

[10]

RFC 5905: "Network Time Protocol Version 4: Protocol and Algorithms Specification".

[11]

TS 38.413: "NG Radio Access Network (NG-RAN); NG Application Protocol (NGAP)".

3 Definitions of terms, symbols and abbreviations p. 7

3.1 Terms p. 7

void

3.2 Symbols p. 7

void

3.3 Abbreviations p. 7

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.

MME

Mobility Management Entity

URCMP

UE Radio Capability Management Protocol

UCMF

UE radio Capability Management Function

4 Protocol Stack p. 7

4.1 Introduction p. 7

The protocol stack for the control plane over the S17 reference points shall be as depicted in Figure 4.1-1. Clause 4.2 and clause 4.3 further specify the related UDP and IP requirements.

Copy of original 3GPP image for 3GPP TS 29.674, Fig. 4.1-1: Control Plane stack over S17

Figure 4.1-1: Control Plane stack over S17
(⇒ copy of original 3GPP image)

4.2 UDP Header and Port Numbers p. 8

4.2.1 General p. 8

A User Datagram Protocol (UDP) compliant with RFC 768 shall be used.

4.2.2 Request Message p. 8

The UDP Destination Port number for a Request message shall be the one and only one configured by the operator for a given PLMN, e.g. in the range of 49152 to 65535.

The UDP Source Port for a Request message is a locally allocated port number at the sending entity.

4.2.3 Response Message p. 8

The UDP Destination Port value of a Response message shall be the value of the UDP Source Port of the corresponding Request message.

The UDP Source Port of a Response message shall be the value from the UDP Destination Port of the corresponding message.

4.3 IP Header and IP Addresses p. 8

4.3.1 General p. 8

In this clause, "IP" refers either to Ipv4 as defined by RFC 791 or Ipv6 as defined by RFC 8200. A URCMP entity shall support both Ipv4 and Ipv6.

4.3.2 Request Message p. 8

The IP Destination Address of a Request message shall be an IP address of the peer entity.

The IP Source Address of a Request message shall be an IP address of the sending entity.

4.3.3 Response Message p. 8

The IP Destination Address of a Response message shall be copied from the IP Source Address of the corresponding Request message.

The IP Source Address of a Response message shall be copied from the IP destination address of the corresponding Request message.

5 General description p. 8

5.1 Introduction p. 8

This document describes the procedures, messages and information elements over the S17 reference point between the MME and the UCMF to support UE Radio Capability Signalling optimization as specified in clause 5.11.3a of TS 23.401.

The UE Radio Capability Management Protocol (URCMP) is used over S17 reference point.