+============
+
+This section tabulates the APIs Aligned(Implemented)/Not Implemented/Additional APIs between various modules of
+ODU-High and also with external modules of ORAN.
+
+*****************
+F1 Interface APIs
+*****************
+
+Below table lists APIs Aligned(Implemented)/Not Implemented at F1 interface of
+ODU-High i.e. between O-DU and O-CU. These are in line with 3GPP 38.473 V15.3.0.
+
++------------+-------------------------------+-----------------+-----------+-----------------------------------------+
+| Interface | API | Status | Section | Remark |
++============+===============================+=================+===========+=========================================+
+| |Reset | Aligned |9.2.1.1 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Reset Acknowledge | Aligned |9.2.1.2 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Error Indication | Not Implemented |9.2.1.3 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |F1 Setup Request | Aligned |9.2.1.4 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |F1 Setup Response | Aligned |9.2.1.5 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |F1 Setup Failure | Not Implemented |9.2.1.6 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |GNB-DU Configuration Update | Aligned |9.2.1.7 | |
+| **CU** +-------------------------------+-----------------+-----------+-----------------------------------------+
+| & **DU** |GNB-DU Configuration Update | Aligned |9.2.1.8 | |
+| |Acknowledge | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |GNB-DU Configuration Update | Not Implemented |9.2.1.9 | |
+| |Failure | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |GNB-CU Configuration Update | Not Implemented |9.2.1.10 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |GNB-CU Configuration Update | Not Implemented |9.2.1.11 | |
+| |Acknowledge | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |GNB-CU Configuration Update | Not Implemented |9.2.1.12 | |
+| |Failure | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |GNB-DU Resource Coordination | Not Implemented |9.2.1.13 | |
+| |Request | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |GNB-DU Resource Coordination | Not Implemented |9.2.1.14 | |
+| |Response | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |GNB-DU Status Indication | Not Implemented |9.2.1.15 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Context Setup Request | Aligned |9.2.2.1 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Context Setup Response | Aligned |9.2.2.2 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Context Setup Faliure | Not Implemented |9.2.2.3 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Context Release Request | Aligned |9.2.2.4 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Context Release Command | Aligned |9.2.2.5 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Context Release Complete | Aligned |9.2.2.6 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Context Modification | Aligned |9.2.2.7 | |
+| |Request | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Context Modification | Aligned |9.2.2.8 | |
+| |Response | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Context Modification | Not Implemented |9.2.2.9 | |
+| |Failure | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Context Modification | Not Implemented |9.2.2.10 | |
+| |Required | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Context Modification | Not Implemented |9.2.2.11 | |
+| |Confirm | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Inactivity Notification | Not Implemented |9.2.2.12 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Notify | Not Implemented |9.2.2.13 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Initial UL RRC Message | Aligned |9.2.3.1 | |
+| |Transfer | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |DL RRC Message Transfer | Aligned |9.2.3.2 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UL RRC Message Transfer | Aligned |9.2.3.3 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Write-Replace Warning Request | Not Implemented |9.2.4.1 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Write-Replace Warning Response | Not Implemented |9.2.4.2 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |PWS Cancel Request | Not Implemented |9.2.4.3 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |PWS Cancel Response | Not Implemented |9.2.4.4 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |PWS Restart Indication | Not Implemented |9.2.4.5 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |PWS failure Indication | Not Implemented |9.2.4.6 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |System Information Delivery | Not Implemented |9.2.5.1 | |
+| |Command | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Paging | Aligned |9.2.6.1 | |
++------------+-------------------------------+-----------------+-----------+-----------------------------------------+
+
+*****************
+E2 Interface APIs
+*****************
+
+This section tabulates the APIs Aligned(Implemented)/Not Implemented between ODU-High and Near-RT RIC.
+These are in line with O-RAN.WG3.E2GAP-R003-v03.00 and O-RAN.WG3.E2AP-R003-v03.00.
+Below mentioned section number are taken reference from sections of O-RAN.WG3.E2AP-R003-v03.00.
+
++------------+-------------------------------+-----------------+-----------+-----------------------------------------+
+| Interface | API | Status |Section | Remark |
++============+===============================+=================+===========+=========================================+
+| |RIC Subscription procedure | Aligned |8.2.1 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |RIC Subscription Delete | Aligned |8.2.2 | |
+| |procedure | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |RIC Subscription Delete | Aligned |8.2.2A | |
+| |Required procedure | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |RIC Indication procedure | Aligned |8.2.3 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |RIC Control procedure | Not Implemented |8.2.4 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |RIC Subscription Modification | Aligned |8.2.5 | |
+| |procedure | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| **DU** |RIC Subscription Modification | Aligned |8.2.6 | |
+| &**RIC** |Required procedure | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |RIC query procedure | Not Implemented |8.2.7 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |E2 Setup procedure | Aligned |8.3.1 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Reset procedure | Aligned |8.3.2 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Error Indication | Aligned |8.3.3 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |RIC Service Update procedure | Aligned |8.3.4 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |E2 Node Configuration Update | Aligned |8.3.5 | |
+| |procedure | | | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |E2 Connection Update procedure | Aligned |8.3.6 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |E2 Removal procedure | Aligned |8.3.7 | |
++------------+-------------------------------+-----------------+-----------+-----------------------------------------+
+
+********************************
+ODU-High Internal Interface APIs
+********************************
+
+Below table lists APIs Aligned(Implemented)/Not Implemented/Additional APIs between various modules of ODU-High.
+These are in line with ORAN-WG8.AAD-v9.00.00, hereafter referred to as AAD Spec.
+
+Note: DU APP module consist functionality related to F1 Handler, E2 Handler and O1 Handler.
+
++------------+-------------------------------+-----------------+-----------+-----------------------------------------+
+| Interface | API | Status | Section | Remark |
++============+===============================+=================+===========+=========================================+
+| |Cell Configuration | Aligned |11.2.1.1 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Slice Configuration | Aligned |11.2.1.2 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Bring Cell Up | Additional API | |Notify DU to bring specific cell up |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+|**SMO-OAM** |Bring Cell Down | Additional API | |Notify DU to bring specific cell down |
+|& **DU APP**+-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Slice PM | Additional API | |DU APP sends PM for all Slices every 60s |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Raise Cell Alarm | Additional API | |DU APP alarms during cell state change |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Set the cell operational state | Additional API | |DU APP inform cell state[ACTIVE/INACTIVE]|
++------------+-------------------------------+-----------------+-----------+-----------------------------------------+
+| |DL Transfer | Aligned |11.2.3.1 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UL Transfer | Aligned |11.2.3.2 | |
+| **RLC** +-------------------------------+-----------------+-----------+-----------------------------------------+
+| & **MAC** |Schedule Result Reporting(DL) | Aligned |11.2.3.3 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Buffer Status Report(UL) | Aligned |11.2.3.4 | |
++------------+-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Air Interface Time | Aligned |11.2.4.1.1 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Cell Configuration Request | Aligned |11.2.4.2.1 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Cell Delete Request | Aligned |11.2.4.2.2 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Slice Configuration Request | Aligned |11.2.4.2.3 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Slice Reconfiguration Request | Aligned |11.2.4.2.4 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Add UE Configuration Request | Aligned |11.2.4.2.5 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Reconfiguration Request | Aligned |11.2.4.2.6 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Delete UE Request | Aligned |11.2.4.2.7 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |DL HARQ Indication | Aligned |11.2.4.2.8 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UL Harq Indication(CRC) | Aligned |11.2.4.2.9 | |
+| **MAC** to +-------------------------------+-----------------+-----------+-----------------------------------------+
+| **SCH** |UL Channel Quality Information | Not Implemented |11.2.4.2.10| |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |DL Channel Quality Information | Not Impelemented|11.2.4.2.11| |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |RACH Indication Contents | Aligned |11.2.4.2.12| |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Paging Indication Contents | Aligned |11.2.4.2.13| |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |RACH Resource Request | Aligned |11.2.4.2.14| |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |RACH Resource Release | Aligned |11.2.4.2.15| |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |DL RLC Buffer Status Info | Aligned |11.2.4.2.16| |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Scheduling Request Indication | Aligned |11.2.4.2.17| |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UL Buffer Status Report Ind | Aligned |11.2.4.2.18| |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Power Headroom Indication | Aligned |11.2.4.2.19| |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Statistics Request | Additional API | | Adding new statistics group |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Statistics Modification Request| Additional API | | Modification of statistics group |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Statistics Delete Request | Additional API | | Deletion of statistics group |
++------------+-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Cell Configuration Response | Aligned |11.2.4.3.1 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Cell Delete Response | Aligned |11.2.4.3.2 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Slice Configuration Response | Aligned |11.2.4.3.3 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Slice ReConfiguration Response | Aligned |11.2.4.3.4 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Configuration Response | Aligned |11.2.4.3.5 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE ReConfiguration Response | Aligned |11.2.4.3.6 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Delete Response | Aligned |11.2.4.3.7 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| **SCH** to |DL Scheduling Information | Aligned |11.2.4.3.8 | |
+| **MAC** +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UL Scheduling Information | Aligned |11.2.4.3.9 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |RAR Information | Not Required |11.2.4.3.10|Included in DL Scheduling Info |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Downlink Control Channel Info | Not Required |11.2.4.3.11|Included in DL Scheduling Info |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Downlink Broadcast Allocation | Not Required |11.2.4.3.12|Included in DL Scheduling Info |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Downlink Paging Allocation | Aligned |11.2.4.3.13| |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |HARQ Process Release | Additional API | |SCH indicates MAC to release a HARQ |
+| | | | |process in case a positive acknowledement|
+| | | | |is received or achieved maximum retrans. |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |RACH Resource Response | Additional API | |Response to RACH Resource Request for |
+| | | | |dedicated resource for CF-RA |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Statistics Response | Additional API | |Response to statistics request |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Statistics Modification | Additional API | |Response to statistics modification |
+| |Resonse | | |request |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Statistics Delete Response | Additional API | |Response to statistics delete request |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Statistics Indication | Additional API | |Calculate the KPI related to a specific |
+| | | | |statistics group |
++------------+-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Cell Start | Aligned |1.1.1.1 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Cell Stop | Aligned |1.1.1.2 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Cell Configuration Request | Additional API | |Configures cell information at MAC. |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Cell Configuration Response | Additional API | |Response to cell Cfg Req from DUAPP |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Cell Delete Request | Additional API | |Deletes cell information at MAC. |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Cell Delete Response | Additional API | |Response to Cell Del request from DU APP |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Slice Configuration Request | Additional API | |Configures Slice at MAC |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Slice ReConfiguration Request | Additional API | |ReConfigures Slice at MAC |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Slice Configuration Response | Additional API | |Response to Slice Cfg req from DU APP |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Slice ReConfiguration Response | Additional API | |Response to Slice ReCfg req from DU APP |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+|**DU APP** |UE Create Request | Aligned |1.1.1.3 | |
+| & **MAC** +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Create Response | Aligned |1.1.1.4 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Reconfiguration Request | Aligned |1.1.1.5 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Reconfiguration Response | Aligned |1.1.1.6 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Delete Request | Aligned |1.1.1.7 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Delete Response | Aligned |1.1.1.8 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |RACH Resource Request | Aligned |1.1.1.9 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |RACH Resource Response | Aligned |1.1.1.10 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |RACH Resource Release | Aligned |1.1.1.11 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Reset Request | Not Implemented |1.1.1.12 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Reset Response | Not Implemented |1.1.1.13 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Sync Status Indication | Not Implemented |1.1.1.14 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UL CCCH Indication | Aligned |1.1.1.15 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |DL CCCH Indication | Aligned |1.1.1.16 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |DL PCCH Indication | Aligned |1.1.1.17 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |DL Broadcast Request | Not Implemented |1.1.1.18 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Slot Indication | Additional API | |Indication about the ongoing SFN and |
+| | | | | Slot information to DU APP |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Statistics Request | Additional API | | Adding new statistics at DU layer |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Statistics Response | Additional API | | Response to statistics request from MAC |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Statistics Modification Request| Additional API | | Modification of statistics at DU layer |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Statistics Modification | Additional API | | Response to statistics modification |
+| |Response | | | request from MAC |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Statistics Delete Request | Additional API | | Deletion of statistics at DU layer |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Statistics Delete Response | Additional API | | Response to statistics delete request |
+| | | | | from MAC |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Statistics Indication | Additional API | | Sending the calculated KPI value to DU |
+| | | | | from MAC |
++------------+-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Create | Aligned |11.2.5.1 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Create Response | Aligned |11.2.5.2 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Reconfiguration | Aligned |11.2.5.3 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Reconfiguration Response | Aligned |11.2.5.4 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Delete | Aligned |11.2.5.5 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UE Delete Response | Aligned |11.2.5.6 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |DL-RRC Message Transfer | Aligned |11.2.5.7 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UL-RRC Message Transfer | Aligned |11.2.5.8 | |
+|**DU APP** +-------------------------------+-----------------+-----------+-----------------------------------------+
+| & **RLC** |UL-RRC Message Delivery Report | Aligned |11.2.5.9 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |RLC Max Retransmission Reached | Not Implemented |11.2.5.10 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UL-RLC Re-establishment Request| Not Implemented |11.2.5.11 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UL-RLC Re-establshment Response| Not Implemented |11.2.5.12 | |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |DL RRC Message Response | Additional API | |Informs DU APP if a DL RRC Message was |
+| | | | |successfuly procesed at RLC & sent to MAC|
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |DL User Data | Additional API | |DL user data exchanged from DUAPP to RLC |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |UL User Data | Additional API | |UL user data exchanged from RLC to DUAPP |
+| +-------------------------------+-----------------+-----------+-----------------------------------------+
+| |Slice Performance Metrics | Additional API | |Performance Metrics informed to DUAPP |
+| | | | |every 60sec for every slice configured |
++------------+-------------------------------+-----------------+-----------+-----------------------------------------+