ETSI TS 103 983 V4.0.0 (2025-05)

Publicly Available Specification (PAS); A1 interface: General Aspects and Principles (O-RAN.WG2.A1GAP-R004-v04.0.0)

RTS/MSG-001163

General Information

• Status: Not Published
• Technical Committee: MSG - Mobile Standards Group
• Current Stage: 12 - Citation in the OJ (auto-insert)
• Due Date: 11-May-2025
• Completion Date: 07-May-2025

Standards Content (Sample)

TECHNICAL SPECIFICATION
Publicly Available Specification (PAS);
A1 interface: General Aspects and Principles
(O-RAN.WG2.A1GAP-R004-v04.00)
CAUTION
The present document has been submitted to ETSI as a PAS produced by O-RAN-Alliance and
approved by the ETSI Technical Committee Mobile Standards Group (MSG).
TECHNICAL SPECIFICATION
ETSI had been assigned all the relevant copyrights related to the document O-RAN.WG2.A1TP-R004-v03.03 on an "as is
basis". Consequently, to the fullest extent permitted by law, ETSI disclaims all warranties whether express, implied, statutory or
otherwise including but not limited to merchantability, non-infringement of any intellectual property rights of third parties. No
warranty is given about the accuracy and the completeness of the content of the present document.

2 ETSI TS 103 983 V4.0.0 (2025-05)

Reference
RTS/MSG-001163
Keywords
interface, PAS
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ETSI
3 ETSI TS 103 983 V4.0.0 (2025-05)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definition of terms, symbols and abbreviations . 7
3.1 Terms . 7
3.2 Symbols . 8
3.3 Abbreviations . 8
4 General Aspects . 8
4.1 A1 architecture . 8
4.1.1 General . 8
4.1.2 Role of A1 in the O-RAN architecture . 9
4.1.3 A1 service architecture . 9
4.1.3.1 A1 policy management service (A1-P) . 9
4.1.3.2 A1 enrichment information service (A1-EI) . 10
4.1.3.3 A1 ML model management service (A1-ML) . 10
4.2 A1 interface general principles . 10
4.3 A1 interface specification objectives . 11
4.4 A1 interface capabilities . 11
5 Functions of the A1 interface . 11
5.1 Policy management . 11
5.1.1 Introduction. 11
5.1.2 The policy management function . 12
5.1.3 Lifecycle aspects of A1 policies . 12
5.1.4 Identification and scope of A1 policies. 13
5.1.4.0 General . 13
5.1.4.1 Identification of UEs . 14
5.1.4.2 Identification of groups of UEs . 14
5.1.4.3 Identification of slices . 14
5.1.4.4 Identification of QoS flows . 15
5.1.4.5 Identification of cells. 15
5.1.5 A1 policy content . 15
5.1.5.1 General . 15
5.1.5.2 Policy objectives . 15
5.1.5.3 Policy resources . 15
5.2 A1 enrichment information . 15
5.2.1 Introduction. 15
5.2.2 The enrichment information function . 16
5.2.3 Lifecycle aspects of A1 enrichment information . 16
5.2.3.1 Registration of enrichment information source . 16
5.2.3.2 Discovery of enrichment information . 16
5.2.3.2.0 General . 16
5.2.3.2.1 Lifecycle aspects of EI types . 16
5.2.3.3 Request and Delivery of enrichment information . 16
5.2.3.3.0 General . 16
5.2.3.3.1 Lifecycle aspects of EI jobs . 17
5.2.3.3.2 Lifecycle aspects of EI job results . 17
5.2.4 Identification of A1 enrichment information . 17
5.2.5 A1 enrichment information format and delivery . 17
5.2.5.1 Push based delivery . 17
ETSI
4 ETSI TS 103 983 V4.0.0 (2025-05)
6 Signalling procedures of the A1 interface . 17
6.1 General . 17
6.2 Policy related procedures . 18
6.3 Enrichment information transfer procedures . 18
6.4 ML model related procedures . 18
7 A1 interface protocol structure . 19
8 Other A1 interface specifications . 19
8.1 A1 TS-family overview . 19
8.2 A1 interface: Use Cases and Requirements . 20
8.3 A1 interface: Transport Protocol . 20
8.4 A1 interface: Application Protocol . 20
8.5 A1 interface: Type Definitions . 20
8.6 A1 interface: Test Specification . 20
Annex A (informative): Change history . 21
History .
...