# Anomaly Detection Introduction
###### tags: `5G Reading`
Date : 2022-12-30

## Take away
AD(Anomaly Detection)主要與Traffic Steeling的xApp整合使用，將服務不佳的UE名單提交給Traffic Steering進行換手以提升UE服務品質。

## Summary
- AD(Anomaly Detection)為O-RAN SC中由HCLTech(印度通訊系統整合商)所上傳的xApp應用，主要與Traffic Steeling的xApp整合使用。AD將從KPIMON所上傳的各項參數輸入預測模型，找出收到服務不夠好;視為異常的UE列出，將此名單傳送至Traffic Steeling協助進行換手動作(Handover)，期望該UE連接至其他基站後能提升其服務品質，完成此流程後AD將進行下一個時間周期的異常檢查。

## Note
- AD執行流程UML:

- AD預期的輸出入內容範例:
- Input: { ‘du-id’ : 1003, ‘nrCellIdentity’ : “c3/B13”, ‘prb_usage’ : 23.0, ‘rsrp’ : 84.0, ‘rsrq’ : 65.0, ‘rssinr’:65.0, ‘targetTput’ : 0.1, ‘throughput’ : , ‘ue-id’ : “Waiting passenger 1”, ‘x’ : -556, ‘y’ : -1160, ‘measTimeStampRf’ : “2021-05-12T07:43:51.652” }
- Output: { ‘ue-id’ : “Waiting passenger 1”, ‘measTimeStampRf’ : “2021-05-12T07:43:51.652”, ‘du-id’ : 1003, ‘Degradation’: “RSRP RSSINR” }
- AD安裝細節:
- **準備執行環境**

       $ sudo ./deploy-ric-platform -f ../RECIPE_EXAMPLE/PLATFORM/example_recipe_oran_e_release.yaml 2>&1 | tee ~/deploy-ric-platform.txt
       $ sudo helm repo add stable https://charts.helm.sh/stable    
       $ sudo helm install nfs-release-1 stable/nfs-server-provisioner --namespace ricinfra
       $ sudo kubectl patch storageclass nfs -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'
       $ sudo apt install nfs-common
       $ sudo kubectl get pods -A

- **透過RIC模組安裝AD**

      $ curl --location --request GET 'http://172.19.205.83:32080/onboard/api/v1/charts' -H 'Content-Type: application/json'
      $ curl --location --request POST 'http://172.19.205.83:32080/appmgr/ric/v1/xapps' -H 'Content-Type: application/json' -d {"xappName":"ad"}'         
      $ sudo kubectl get pods -A

- **檢測其與TS/DB互動關係**

       $ sudo kubectl logs -f -n ricxapp ricxapp-trafficxapp-5985c48dc7-hvvm2
       $ sudo kubectl logs -f -n ricxapp ricxapp-ad-54987d6965-t5pvg
       $ sudo kubectl logs -f -n ricplt ricplt-influxdb-meta-0