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Use Case Key Information

Business Driver

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Business Driver

EXECUTIVE SUMMARY - This requirement enhances the A1 adapter/interface capabilities provided in Rel 6 as part of  5G/ORAN & 3GPP Standards Harmonization requirement ( REQ-38).   O-RAN has defined A1 interface specification in the context of the management of 5G RAN elements to provide intent based policies for optimization of the RAN network performance. Planned enhancements for Rel 7 include additional support for managing A1 Policies, multiple A1 targets in the RAN, multi-version support for different A1 targets, and secure TLS communication.

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• Implemented as an SDNC/CCSDK extension to terminate & expose A1 interface
• https://wikilf-onap.onapatlassian.orgnet/wiki/display/DW/A1+Adapter+in+ONAP
• Developed for Release Requirement (REQ-38): 5G / ORAN & 3GPP Standards Harmonization
• Can be used by other ONAP functions to perform A1 Policy Operations over A1 Interface
• Provides DMaaP northbound interface, and REST (A1) southbound interface

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• Add additional support for standardized A1 protocol (O-RAN A1-AP v1.1)
  • Current (Frankfurt) supports only O-RAN-SC’s (draft) non-spec version of A1 Application Protocol
  • Will add support for upcoming A1 standard spec evolution
  • Will add support for multiple versions for different A1 connections
• Managing A1 Policies
  • Operations:
    • Query A1 Policy Types in near-RT-RICs
    • Create/Query/Update/Delete A1 Policy Instances in near-RT-RICs
    • Query Status for A1 Policy Instances
  • Maintain transient cache of RAN’s A1 Policy information
    • Support RAN-wide view of A1 Policy information
    • Streamline A1 traffic
    • Enable (optional) re-synchronization after inconsistencies / near-RT-RIC restarts
• Add support for multiple near-RT-RICs (with multi-version support)
• Unified REST & DMaaP NBI
• Add support for TLS/HTTPS REST for southbound A1 interfaces (and NBIs)
  • Leverage existing ONAP cert management approaches
• Converge ONAP & O-RAN-SC A1 Adapter/Controller functions in ONAP SDNC/CCSDK
  • Proposed functionality is currently available as 2 functions in O-RAN-SC
  • Basic A1 Adapter is an ODL extension & Policy Management is a separate microservice

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• • for multiple versions for different A1 connections
• Managing A1 Policies
  • Operations:
    • Query A1 Policy Types in near-RT-RICs
    • Create/Query/Update/Delete A1 Policy Instances in near-RT-RICs
    • Query Status for A1 Policy Instances
  • Maintain transient cache of RAN’s A1 Policy information
    • Support RAN-wide view of A1 Policy information
    • Streamline A1 traffic
    • Enable (optional) re-synchronization after inconsistencies / near-RT-RIC restarts
• Add support for multiple near-RT-RICs (with multi-version support)
• Unified REST & DMaaP NBI
• Add support for TLS/HTTPS REST for southbound A1 interfaces (and NBIs)
  • Leverage existing ONAP cert management approaches
• Converge ONAP & O-RAN-SC A1 Adapter/Controller functions in ONAP SDNC/CCSDK
  • Proposed functionality is currently available as 2 functions in O-RAN-SC
  • Basic A1 Adapter is an ODL extension & Policy Management is a separate microservice

A1 Policies - Northbound Interface (REST & DMaaP) Proposed

• See

  Jira Legacy
  server System Jira columns key,summary,type,created,updated,due,assignee,reporter,priority,status,resolution serverId 4733707d-2057-3a0f-ae5e-4fd8aff50176 key CCSDK-2489

    and Open API (yaml)

Policy Types / Policy Instances / Policy Status Operations  (REST)

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• Synchronize A1 Policy Information in RAN
• A1 Policy Type / Instance Operations
• A1 Policy Instance Status Operations
• See REQ-447 and linked resources for more information on TEST Release Requirements

Test variations:

• A1 Adapter with/without A1 Policy Management Service
• A1 versions:
  • O-RAN Alliance (spec) v1.1.3
  • O-RAN-SC A1 (non-spec) v2.1.0

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End to End flow to be Tested

Test Cases and Status

Use Case Functional Definitions

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