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RIC Software Development Kit

Enable xApp to:

  • Send messages
  • Access R-NIB and database
  • Talk to eNBs and gNBs
  • Define life-cycle
  • Report logs and status

Help developers:

  • Generate skeleton codes
  • Setup development and testing environments
  • Package, distribute and onboard their xApp

RIC SDK Components

  • Libraries, Interfaces and APIs
  • Tools
  • Documentation and Guides
  • Code Samples
  • Processes and Flows



ORAN Libraries, Interfaces and APIs

RAN Inventory Management

R-NIB:

  • Inventory of RAN elements connected to the RIC
  • Service models (SMs) supported by each RAN element
  • …

Note: Load balanced connection management via replicated E2 Terms.

Other NIBs store UE-level metrics and aggregate metrics.


xApp O-RAN interfaces

E2:

  • Available E2SMs populated in R-NIB (in R5)
  • xApp constructs E2AP/SM message contents and sends/receives via RMR
  • RMR will route subscription requests to SubManager (for policy checking) and all messages to the correct E2T instance. (now)
  • REST-based subscription API (in R5)

A1:

  • Policy definition happens outside RIC
  • xApp specifies supported policy types in xApp descriptor
  • xApp receives policy instance creation/deletion via RMR
  • Frameworks: ”register handler for A1” (now)

O1-CM:

  • Initial and updated configuration via K8s config map
  • We believe this can be abstracted by the framework (xApp just registers a handler)
  • Still open discussion in O-RAN WGs on how LCM should be done.

O1-PM/FM:

  • xApp alarm api partially available in R4 (go only), stat api in R5.
  • (for now) AT&T xApps use VES, Nokia xApps use Prometheus.

Platform Libraries and APIs

Name

Purpose

LanguagesFrameworksAPIs
RMR

Policy driven messaging

C++, Python, Go

Yes

RIC Message Router – RMR

SDL

 shared data storage

C++, Go

Yes

O-RAN SC SDL C++ library User Guide

Log

Logging

C/C++, Python, Go

Yes


Alarm

Alarm Propagation

C++, Go

No

RIC Alarm System

Jaeger

Tracing

C++, Go

NoRIC tracing helper library

xAppFramework

Wrappers

C++, Python, Go

Yes

RIC xAPP C++ Framework


Platform Libraries and APIs

Name

Purpose

LanguagesFrameworksAPIs
RMR

Policy driven messaging

C++, Python, Go

Yes

RIC Message Router – RMR

SDL

 shared data storage

C++, Go

Yes

O-RAN SC SDL C++ library User Guide

Log

Logging

C/C++, Python, Go

Yes

RIC Alarm System

Alarm

Alarm Propagation

C++, Go

No


Jaeger

Tracing

C++, Go

NoRIC tracing helper library

xAppFramework

Wrappers

C++, Python, Go

Yes

RIC xAPP C++ Framework


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