Monitor Customized SM

Overview

A customized service models monitoring xApp is designed to collect the states from the RAN functions in E2-Nodes via different customized SMs, including MAC, RLC, PDCP, GTP, and SLICE 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
• xApp Logic: prints out one way latency of each SM's indication message
• Exit: unsubscribes and terminates xApp

Note: It is mandatory to have a configuration file for this xApp since it is required to know which service model to call with specific indication periodic timer.

Check the customized 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_mac()
    • sm_cb_rlc()
    • sm_cb_pdcp()
    • sm_cb_gtp()
    • sm_cb_slice()

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Exit - Step 15 to 20

• Used functions
  • rm_report_sm_xapp_api()
  • try_stop_xapp_api()