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Objective

Typically network-functions supporting NetConf Callhome do not support at the same time the VES event 'pnfRegistration'. In order inform the µServices within the SMO, a functionality as at OAM-Controller level should be implemented. This function should send a VES pnfRegistration event to the VES-Collector when a new NetConf Server, which is part of the callhome-allowed-devices list inside the OAM-Controller, sends a Callhome message and a new mount-point is created which is listed in the allowed devices.

As the OAM controller is listening to VES.pnfRegistration to establish NetConf sessions for "O-RAN O1 nodes" the VES:pnfRegistration invoked by the OAM-Controller must be ignored.

Sequence Diagram

PlantUML Macro

''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' 
' PlantUML for O-RAN-SC closed loop use case D-release (OAM view)
'
' Copyright 2021 highstreet technologies GmbH
' Licensed under the Apache License, Version 2.0 (the "License"); 
' you may not use this file except in compliance with the License. 
' You may obtain a copy of the License at 
' 
' http://www.apache.org/licenses/LICENSE-2.0 
' 
' Unless required by applicable law or agreed to in writing, software 
' distributed under the License is distributed on an "AS IS" BASIS, 
' WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
' See the License for the specific language governing permissions and 
' limitations under the License. 
'

@startuml

' Diagram 
title 
  NetConf/Callhome to VES-PNF-Registration
  OpenDaylight Aluminium SSH only
end title

box "User space" #lightblue 
  actor "Operator" as user 
end box 

box "SMO" #gold 
  participant "Message-Router" as mr 
  participant "VES-Collector" as ves
  participant "OAM-Controller" as oam 
end box 

box “O-RU” #lightpink 
  participant "NetConf-Server-OFH" as ncsofh 
end box 

autonumber 1 1 "<b>[00]" 

== init ==

user -> ncsofh: SET NetConfServer params for Callhome\nOAM-Controller listen on port 6666
user <- ncsofh: GET publicKey
user -> oam: SET allowed devices with publicKey 

loop Listen to pnfRegistration
  oam -> mr : VES subscription
end 

== use case ==

ncsofh -> oam: NETCONF Callhome SSH
ncsofh <-> oam: NETCONF <hello/> \nExchange capabilities \nincluding YANG modules for OpenFronthaul
oam -> oam: create mount point \nin network-topology=topology-netconf

oam -> ves : VES:domain=notification \nNetConf connection status \nchanged to "connected"
ves -> mr: publish event

group if mount-point:node-id is in "alloved devices"
  oam -> ncsofh: GET ietf-hardware/components\nThe first item in the list is used \nfor mapping into VES:pnfRegistration event.
  ncsofh -> oam: response of first item
  oam -> oam: map ietf-hardware/component[not(parent)][1] \ninto VES:pnfRegistration (see below)
  oam -> ves: VES:domain=pnfRegistration\nwith 'reporter=OAM-Controller-id'
  ves -> mr: publish event
  mr -> oam: fetch pnfRegistration
  group if 'reporter=OAM-Controller-id'
  oam -> oam: ignore!!!
  end
end

group if <create-subscription/> supported
  oam -> ncsofh: NETCONF Notification Subscription
end

' End Diagram
' Format

right footer 

  Thanks to PlantUml! 
  License: Apache 2.0
  2021-02-06 | o-ran-sc.org
end footer

skinparam backgroundColor #fefefe

skinparam backgroundColor #fefefe
'skinparam handwritten true
skinparam roundcorner 15

skinparam database  {
    BorderColor #444444
    BackgroundColor #ffffdd
    FontColor #444444
}

skinparam sequence {
  MessageAlign left
  ArrowColor #2277dd
  ArrowFontColor #444444
  ArrowThickness 2
  ActorBorderColor #444444
  LifeLineBorderColor #444444
  LifeLineBackgroundColor #eeeeee
  LifeLineBackgroundColor #eeeeee
 
  BoxBorderColor #444444
    
  GroupBorderColor #444444
  GroupBackgroundColor #eeeeee
  
  ParticipantBorderColor #444444
  ParticipantBackgroundColor #ffffdd
  ParticipantFontColor #444444
    
  ActorBackgroundColor #ffffdd
  'ActorFontColor DeepSkyBlue
  'ActorFontSize 17
  'ActorFontName Aapex
}

@enduml

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Key

Objective

Sequence Diagram

Implementation

Mapping to VES pnfRegistration fields