Monitor O-RAN SM

Overview

A O-RAN standardized service models monitoring xApp is designed to collect the measurement data from the RAN functions in E2-Nodes via -RAN standardized SMs (e.g., KPM SMs). It prints out the one way latency of indication message, which is sent from E2-Node to xApp. It includes the following stages:

• Init: initializes xApp based on configuration to set up the E42 connection with NearRT-RIC
• Report Service: subscribes RAN functions to each E2-Node based on the configured service model and action definitions
• xApp Logic: prints out expected measurement data and one way latency of indication message and
• Exit: unsubscribes and terminates xApp

Note: It is mandatory to have a configuration file for this xApp since it is required to know service mode type, measurement name and indication timer.

Check the O-RAN xApp configuration for detail implementation

Sequence Diagram

Detail

source code: link

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Init - Step 2 to 6

• Used Functions
  • init_fr_args()
  • init_xapp_api()
  • e2_nodes_xapp_api()

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Report Service - Step 7 to 13

• Used Function
  • report_sm_xapp_api()

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xApp Logic - Step 14

• Used Function
  • sm_cb_{SM-NAME}()
    • sm_cb_kpm()

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Exit - Step 15 to 20

• Used functions
  • rm_report_sm_xapp_api()
  • try_stop_xapp_api()