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

Sequence Diagram

Detail

source code: xapp_cust_moni.go

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Init - Step 2 to 6

• Used Functions
  • Init()
  • Get_cust_sm_conf()
  • Conn_e2_nodes()

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Report Service - Step 7 to 13

• Used Function
  • Report_{SM-NAME}_sm()
    • Report_mac_sm()
    • Report_rlc_sm()
    • Report_pdcp_sm()
    • Report_gtp_sm()
    • Report_slice_sm()

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xApp Logic - Step 14

• Used Function
  • ({SM-NAME}Callback)Handle()
    • (MACCallback)Handle()
    • (RLCCallback)Handle()
    • (PDCPCallback)Handle()
    • (GTPCallback)Handle()
    • (SLICECallback)Handle()

Note: Each indication message received through (MAC/RLC/PDCP/GTP/SLICECallback)Handle() with the respective structure of swig_mac/rlc/pdcp/gtp/slice_ind_msg_t as input. For complete decoding of the message contents, understanding this structure is crucial.

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Exit - Step 15 to 20

• Used functions
  • Rm_report_{SM-NAME]_sm()
    • Rm_report_mac_sm()
    • Rm_report_rlc_sm()
    • Rm_report_pdcp_sm()
    • Rm_report_gtp_sm()
    • Rm_report_slice_sm()
  • Try_stop()