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' Copyright 2023 O-RAN-SC Projects NONRTRIC, SIM, OAM
' This work is licensed under a Creative Commons Attribution 4.0 International License.
' SPDX-License-Identifier: CC-BY-4.0
' https://creativecommons.org/licenses/by/4.0/deed.en

@startuml o-ran-sc-i-pm-streaming-sequence
title 
  Performance Measurement Data flows 
  stream based and 3GPP xml file based
end title

' format
autonumber 1 1 "<b>[00]"
hide unlinked
hide stereotype
skinparam backgroundColor #fefefe
skinparam roundcorner 15

skinparam participant {
    BackgroundColor<< NONRTRIC >> green
    FontColor<< NONRTRIC >> #eeeeee
}

skinparam database {
    BackgroundColor<< NONRTRIC >> green
    FontColor<< NONRTRIC >> green
}
' end format

' the sequence diagram
box "App layer" #LightBlue
  participant "rApp" as rApp
end box

box "NONRTRIC" #GoldenRod
  participant "Information Coordinator Service (DME)" as dmeICS << NONRTRIC >>
end box

box "NONRTRIC RAN PM" #gold
  participant "PM (File) Collector" as pmDFC << NONRTRIC >>
  participant "PM Data Converter" as pmConvert << NONRTRIC >>
  participant "PM Data Producer (Streamed)" as pmProducer << NONRTRIC >>
  participant "PM Data Influx Producer/Consumer" as pmInflux << NONRTRIC >>
  database "PM Datastore (S3)" as pmDb << NONRTRIC >>
  database "PM Datastore (InfluxDB)" as pmDbInflux << NONRTRIC >>
end box

box "SMO OAM" #gold
  participant "Message Router / Kafka" as mr
  participant "PM Coordination" as pmCoord
  participant "PM (Stream) Collector" as pmCollectStream #LightGreen
  participant "VES Collector" as ves
  participant "OAM Controller" as sdnr
end box

box "Network Topology Simulation" #LightPink
  participant "NetworkFunction\nNTSims" as nf
  participant "PM File\nCreator Sim" as pmFileCreator << NONRTRIC >>  
end box

box "Simulation" #LightBlue
  participant "PM Trigger App" as trigger
end box

== init ==
nf -> ves : <<HTTP/TLS>> VES pnfRegistration <O1>
ves -> mr : forward VES pnfRegistration
mr -> sdnr : grep VES pnfRegistration
sdnr -> sdnr : create Mount Point
sdnr -> nf : <<NETCONF/TLS>> establish connection <O1-CM>
sdnr -> mr : Connected!
mr -> pmCoord : Connection to NF established

== Stream-based PM JOB Configuration ==
alt Unmanaged PM jobs on NFs
  rApp -> sdnr : configure PM data streaming subscription <R1-OAM(tbc)>
  sdnr -> nf : <<NETCONF/TLS>> PM Job Creation <O1-CM>
else  Managed PM jobs on NFs
  rApp -> pmCoord : configure PM data streaming subscription <R1-OAM(tbc)>
  pmCoord -> pmCoord : analyze subscription
  pmCoord -> sdnr : PM Job Creation
  sdnr -> nf : <<NETCONF/TLS>> PM Job Creation <O1-CM>
end
nf -> sdnr : PM Job Created\nincludes http target for stream establishment <O1-CM>
sdnr -> pmCoord : PM Job Created

== PM Data Streaming ==

nf -> pmCollectStream : <<HTTP/TLS>> establish Streaming Connection \nincludes mapping from streamId to jobId <O1-PM>
pmCollectStream -> nf : <<HTTP/TLS>> Connection Established returns ConnectionId (wss:url) <O1-PM>
trigger -> sdnr : <<RESTCONF/TLS>> Trigger PM stream (Periodic?),\nwhen UEs are entering, leaving the cell <SIM>
note left of nf : PM reporting happens continuously/periodically, not triggered by specific events ? 
loop while PM job is active in NF
  sdnr -> nf : <<NETCONF/TLS>> trigger <SIM>
  note left of nf : PM reporting happens continuously/periodically. Not sure what is this trigger ? 
  nf -> pmCollectStream : <<WebSocket>> report PM data via stream unit (wss:url) <O1-PM>
  pmCollectStream -> pmDb : store pm data (3GPP-XMLformat)
  pmCollectStream -> mr : PM Data (raw) available
end

== File-based PM Job Configuration ==

alt Unmanaged PM jobs on NFs
  rApp -> sdnr : configure file-based PM data subscription <R1-OAM(tbc)>
  sdnr -> nf : <<NETCONF/TLS>> PM Job Creation <O1-CM>
else Managed PM jobs on NFs
  rApp -> pmCoord : configure file-based PM data subscription <R1-OAM(tbc)>
  pmCoord -> pmCoord : analyze subscription
  pmCoord -> sdnr : PM Job Creation
  sdnr -> nf : <<NETCONF/TLS>> PM Job Creation <O1-CM>
  nf -> sdnr : PM Job Created <O1-CM>
  sdnr -> pmCoord : PM Job Created
end

== PM Data File Collection ==

loop while PM job is active in NF
  nf -> ves : File-Ready <O1-PM>
  ves -> mr :  File-Ready
  mr -> pmDFC :  File-Ready
  pmDFC -> nf : <<(S)FTP/FTPS/SCP/TLS>> Collect/Transfer File <O1-PM>
  pmDFC -> pmDb : store pm data (XML)
  pmDFC -> mr : PM Data (raw) available
end

== PM Data Convertion (Common) ==

loop while PM Job is active in NF
  mr -> pmConvert : PM Data (raw) available
  pmConvert -> pmDb : Collect raw (3GPP-XMLformat) PM Data
  pmConvert -> pmConvert : Covert PM data to JSON
  pmConvert -> pmDb : Store pm data (json)
  pmConvert -> mr : PM Data (json) available
end

== DME Data Producers & Consumers (Common) ==

loop while PM Job is active in NF
  mr -> pmConvert : PM Data (raw) available
  pmConvert -> pmDb : Collect raw (3GPP-XML format) PM Data
  pmConvert -> pmConvert : Covert PM data to JSON
  pmConvert -> pmDb : Store pm data (json)
  pmConvert -> mr : PM Data (json) available
end

== DME Data Producers & Consumers <<R1 DME>>==
loop while PM Job is active in NF

  opt RAN PM Data (R1-PM 'streamed ranpm' datatype) is streamed to rApp
    note over pmProducer, dmeICS :  Init RAN PM Data Producer registration with DME (DME Producer)
    pmProducer -> dmeICS : Register data 'streamed ranpm' type (if not already registered)
    pmProducer -> dmeICS : Register as 'streamed ranpm' producder
    note over rApp, dmeICS : rApp creates 'streamed ranpm' subscription (DME Consumer)
    rApp -> dmeICS : Register data 'streamed ranpm' type (if not already registered)
    rApp -> dmeICS :  Create subscription/job for 'streamed ranpm' data 
    activate rApp
    note over rApp, pmProducer : DME  coordinates between DME Producer/Consumer
    dmeICS -> pmProducer : Job/subscription created - includes job parameters
    loop while data available / continuous
      pmProducer -> pmDb :  retrieve appropriate pm data (json)
      pmProducer -[#Blue]> mr : data: (type : 'streamed ranpm')
      mr -[#Blue]> rApp: data : (type : 'streamed ranpm')
      opt wait for new data
          mr -> pmProducer : PM Data (json) available
      end
    end loop 
    deactivate rApp
  end opt


  opt RAN PM Data (R1-PM 'stored ranpm' datatype) is produced by influxDB producer
    note over pmInflux, dmeICS :  Init RAN PM Data Producer registration with DME (DME Producer)
    pmInflux -> dmeICS : Register data 'stored ranpm' type (if not already registered)
    group #a0a0a090 <color #red>TBC</color>
      pmInflux -> dmeICS : Register as 'stored ranpm' producder
      note over rApp, dmeICS : rApp creates 'stored ranpm' subscription (DME Consumer)
      rApp -> dmeICS : Register data 'stored ranpm' type (if not already registered)
      rApp -> dmeICS :  Create subscription/job for 'streamed ranpm' data 
      activate rApp
    end group
    note over rApp, pmProducer : DME  coordinates between DME Producer/Consumer
    dmeICS -> pmProducer : Job/subscription created - includes job parameters
    activate pmProducer
    loop while data available / continuous
      pmInflux -> pmDb :  retrieve appropriate pm data (json)
      pmInflux -> pmDbInflux :  store appropriate pm data (json)
      pmInflux -> mr : data available: (type : 'stored ranpm')
      opt wait for new data
          mr -> pmProducer : PM Data (json) available
      end
    end loop 
    deactivate pmProducer
    deactivate rApp
  end opt

  group #a0a0a090 <color #red>TBC</color>
    ' Currently AIMLFMW does not act as a DME consumer to read the InfluxDB. It reads it direct 
    ' According to the 'current' specs that is fine - AIMLFW is not an 'rApp' 
    ' However, as the Disaggregated SMo work progressed it will need to use DME. 
    opt RAN PM Data (R1-PM 'stored ranpm' datatype) is consumed by rApp from influxDB producer
      group #a0a0a090 <color #red>TBC</color>
        note over rApp, dmeICS : rApp creates 'stored ranpm' subscription (DME Consumer)
        rApp -> dmeICS : Register data 'stored ranpm' type (if not already registered)
        rApp -> dmeICS :  Create subscription/job for 'streamed ranpm' data 
        activate rApp
      end group
      loop while data available / continuous
        rApp -> pmDbInflux :  retrieve appropriate pm data (json)
        opt wait for new data
            mr -> rApp : data available: (type : 'stored ranpm')
        end
      end loop 
      deactivate rApp
    end opt
  end group

end loop 

' What happens when PM job on NF is removed? (And How?)
' Should DME job be automatically removed?   

right footer Copyright 2023 O-RAN-SC Projects NONRTRIC, SIM, OAM\lThis work is licensed under a Creative Commons Attribution 4.0\l International License.\lSPDX-License-Identifier: CC-BY-4.0\n2023-09-21 | o-ran-sc.org oam project | Thanks to PlantUML!

@enduml