X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?a=blobdiff_plain;f=docs%2Fapi-docs.rst;h=c5b6500fe9fa40e3c0ea2593e28bd9f5a5067e05;hb=799160e805914b3131eb2b22f66c7a38a1bf9733;hp=9cbbff6ba6f96732c307b04908b5f53d9a1d8f0e;hpb=131089020214ee333453548430470a96f075d9e6;p=o-du%2Fl2.git diff --git a/docs/api-docs.rst b/docs/api-docs.rst index 9cbbff6ba..c5b6500fe 100644 --- a/docs/api-docs.rst +++ b/docs/api-docs.rst @@ -6,7 +6,7 @@ API-Docs ********** -This is the API-docs for G release o-du/l2. +This is the API-docs for H release o-du/l2. .. contents:: :depth: 3 @@ -15,243 +15,199 @@ This is the API-docs for G release o-du/l2. Introduction ----------------- -This document lists the APIs implemented between various modules of ODU-High and their functionality. -These are in line with ORAN-WG8.AAD-v5.00.00, hereafter referred to as AAD Spec. +This document tabulates the APIs Aligned(Implemented)/Not Implemented/Additional APIs between various modules of +ODU-High and their functionality. +These are in line with ORAN-WG8.AAD-v7.00.00, hereafter referred to as AAD Spec. Note: DU APP module consist functionality related to F1 Handler and O1 Handler -API Functions -------------- -1. RLC-MAC Interface +API Table +----------- ++------------+-------------------------------+-----------------+-----------+-----------------------------------------+ +| 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| | ++------------+-------------------------------+-----------------+-----------+-----------------------------------------+ +| |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 | ++------------+-------------------------------+-----------------+-----------+-----------------------------------------+ +| |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 | ++------------+-------------------------------+-----------------+-----------+-----------------------------------------+ +| |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 | ++------------+-------------------------------+-----------------+-----------+-----------------------------------------+ - - AAD Spec : section 9.2.2 - - A. RLC to MAC - - a. Data Transfer(DL) : Transfers DL data to MAC as per Section 9.2.2.1 of the AAD Spec - - b. Buffer Status Reporting(DL) : Reports DL data volume pending in the RLC entity, as per Section 9.2.2.4 of the - AAD Spec - - B. MAC to RLC - - a. Data Transfer(UL) : Transfers UL data to RLC as per Section 9.2.2.2 of the AAD Spec - - b. Schedule Result Reporting (DL) : Reports DL schedule result to RLC as per Section 9.2.2.3 of the AAD Spec - -2. MAC-Scheduler Interface - - - AAD Spec : section 9.2.3 - - A. MAC to Scheduler - - a. Air Interface Time : Sends timing information over air interface in terms of SFN and slo, as per Section - 9.2.3.1.1 of the AAD Spec. - - b. Cell Configuration Request : MAC provides SCH the cell configuration as per Section 9.2.3.2.1 of the AAD Spec. - - c. Add UE Configuration Request : MAC provides SCH the configuration/capabilities of a UE as per Section 9.2.3.2.5 of the AAD Spec. - - d. Modify UE Reconfiguration Request : MAC provides SCH the re-configuration of UE, also used to - add/release/modify existing bearers, as per Section 9.2.3.2.6 of the AAD Spec. - - e. RACH Indication : MAC receives the RACH Indication and share the contents with SCH as per Section 9.2.3.2.12 of the AAD Spec. - - f. DL RLC Buffer Status Information : Reports data volume per LC when it is received at MAC as per Section - 9.2.3.2.16 of the AAD Spec. - - g. UL Buffer Status Report Indication : On reception and decoding of received BSR from the UE, MAC provides SCH - buffer status report for UL scheduling, as per Section 9.2.3.2.18 of the AAD Spec. - - h. UE Delete Request : MAC receives UE delete request and forwards the request to SCH as per Section 9.2.3.2.7 - of the AAD Spec. - - i. Cell Delete Request : MAC receives UE delete request and forwards the request to SCH as per Section 9.2.3.2.2 - of the AAD Spec. - - j. Slice Configuration Request : MAC receives Slice Configuration request and forwards the request to SCH as per Section - 9.2.3.2.3 of the AAD Spec. - - k. Slice Reconfiguration Request : MAC receives Slice Reconfiguration request and forwards the request to SCH as per - Section 9.2.3.2.4 of the AAD Spec. - - l. Paging Indication : MAC receives Paging Indication and forwards the trigger to SCH as per Section 9.2.3.2.13 of the AAD Spec. - - m. RACH Resource Request : MAC receives RACH Resource Request for dedicated RACH resource allocation and forwards to SCH as per - Section 9.2.3.2.14 of the AAD Spec. - - n. RACH Resource Release : MAC receives RACH Resource Release from DU APP and forwards to SCH as per Section 9.2.3.2.15 of the - AAD Spec. - - o. DL HARQ Indication : MAC receives UCI Indication and forwards any DL HARQ feedback from UE to SCH as per Sectiion 9.2.3.2.8 - of the AAD spec. - - p. UL HARQ CRC Indication : MAC receives CRC Indication from PHY and forwards the decoded results to SCH as per Section - 9.2.3.2.9 of the AAD Spec. - - q. Scheduling Request Indication : MAC indicates to scheduler through this API when UE has to be scheduled for uplink - grant as per Spec 9.2.3.2.17 of the AAD Spec. - - B. Scheduler to MAC - - a. Cell Configuration Response - Response to cell configuration request from MAC, as per Section 9.2.3.3.1 of the AAD Spec. - - b. UE Reconfiguration Response - Response to UE reconfiguration request from MAC, as per Section 9.2.3.3.6 of the AAD Spec. - - c. DL Scheduling Information - Provides scheduling information for a given slot for downlink data, as per Section - 9.2.3.3.8 of the AAD spec. - - d. UL Scheduling Information - Provides scheduled information for MAC to form the UL_TTI.request towards O-DU Low, - as per Section 9.2.3.3.9 of the AAD Spec. - - e. RAR Information - Informs MAC of uplink scheduling and Msg3 scheduling information, as per Section 9.2.3.3.10 of the AAD Spec. - - f. Downlink Control Channel Information - Provides DCI scheduling information for a given slot on PDCCH, as per - Section 9.2.3.3.11 of the AAD Spec. - - g. Downlink Broadcast Allocation - Provides DCI and DL data scheduling information for SIB1 for a given slot for - Broadcast Channel, as per Section 9.2.3.3.12 of the AAD Spec. - - h. UE Delete Response - Response to UE delete request from MAC, as per Section 9.2.3.3.7 of the AAD Spec. - - i. Cell Delete Response - Response to Cell delete request from MAC, as per Section 9.2.3.3.2 of the AAD Spec. - - j. Slice Configuration Response : Response to Slice Configuration request from MAC, as per Section 9.2.3.3.3 of the AAD Spec. - - k. Slice Reconfiguration Response : Response to Slice Reconfiguration request from MAC, as per Section 9.2.3.3.4 of the AAD Spec. - - l. Downlink Paging Allocation : Provides DCI and DL data scheduling information for any Paging queued for a given slot - for Paging Channel, as per Section 9.2.3.3.13 of the AAD Spec. - - m. Ue Configuration Response : Response to UE reconfiguration request from MAC, as per Section 9.2.3.3.5 of the AAD Spec. - -3. DU APP - MAC Interface - - - AAD Spec : section 9.2.4 - - A. DU APP to MAC - - a. Cell Start - Commands MAC to start cell at L1 and to start broadcasting system information, as per Section - 9.2.4.1 of the AAD Spec. - - b. UE Create Request - Adds UE information at MAC as per Section 9.2.4.3 of the AAD Spec. - - c. UE Reconfiguration Request - Reconfigure UE information for a UE already added at MAC, as per Section 9.2.4.5 of the AAD Spec. - - d. DL CCCH Indication - Sends DL CCCH Message to MAC to be sent to UE, as per Section 9.2.4.16 of the AAD Spec. - - e. Cell Stop - Commands MAC to stop cell at L1, as per Section 9.2.4.2 of the AAD spec. - - f. UE Delete Request - Deletes UE information at MAC as per Section 9.2.4.7 of the AAD Spec. - - g. DL PCCH Indication - Sends DL PCCH Message to MAC for any Paging scheduled on a slot, as per Section 9.2.4.17 of the AAD Spec. - - h. RACH Resource Request - Requests for dedicated RACH resources for CF-RA with a UE, as per Section 9.2.4.9 of the AAD Spec. - - i. RACH Resource Release - Releases dedicated RACH resources allocated for a UE for CF-RA, as per Section 9.2.4.11 of the AAD Spec. - - B. MAC to DU APP - - a. UE Create Response - Response to UE Create Request from DU Manager as per Section 9.2.4.4 of the AAD Spec. - - b. UE Reconfiguration Response - Response to UE Reconfiguration Request from DU APP as per Section 9.2.4.6 of the - AAD Spec. - - c. UL-CCCH Indication - Sends the UL CCCH Message received from UE to DU APP as per Section 9.2.4.15 of AAD Spec. - - d. UE Delete Response - Response to UE Delete Request from DU Manager as per Section 9.2.4.8 of the AAD Spec. - - e. RACH Resource Response - Responds with dedicated resources allocated for CF-RA for a UE, as per Section 9.2.4.10 of the AAD Spec. - -4. DU APP - RLC Interface - - - AAD Spec : section 9.2.5 - - A. DU APP to RLC - - a. UE Create - Adds UE associated RLC entity and related information as per Section 9.2.5.1 of the AAD Spec. - - b. UE Reconfiguration - Reconfigures the UE associated RLC entity previously added at RLC, as per Section 9.2.5.3 of the AAD Spec. - - c. DL RRC Message Transfer - Requests RLC to deliver RRC message from CU to the UE, as per Section 9.2.5.7 of the AAD Spec. - - d. UE Delete Request - Deletes UE associated RLC entity and related information as per Section 9.2.5.5 of the AAD Spec. - - B. RLC to DU APP - - a. UE Create Response - Response to UE Create Request from DU APP, as per Section 9.2.5.2 of the AAD Spec. - - b. UE Reconfiguration Response - Response to UE Recofiguration Request from DU APP, as per Section 9.2.5.4 of the AAD Spec. - - c. UL RRC Message Tranfer - Delivers RRC Message from UE to CU as per Section 9.2.5.8 of the AAD spec. - - d. RRC Message Delivery Report - Informs DU Manager on failed/successful delivery of a DL RRC message to UE, as - per Section 9.2.5.9 of the AAD Spec. - - e. UE Delete Response - Response to UE Delete Request from DU APP, as per section 9.2.5.6 of the AAD Spec. - -5. SMO-OAM - DU APP - - - AAD Spec: Section 9.2.1 - - A. SMO-OAM to DU APP - - a. Cell Configuration - Sends Basic Cell Configurations to DU APP as per Section 9.2.1.1 of the AAD Spec. - - b. Slice Configuration - Sends Slice Configurations to DU APP as per Section 9.2.1.2 of the AAD Spec. - -Additional APIs ----------------- - -1. DU APP - MAC Interface - - A. DU APP to MAC - - a. Cell Configuration Request - Configures cell information at MAC. - - b. Cell Delete Request - Deletes cell information at MAC. - - c. Slice Configuration Request : Triggers Slice Configuration request once received from O1 towards MAC. - - d. Slice Reconfiguration Request : Triggers Slice Reconfiguration request once received from O1 towards MAC. - - B. MAC to DU APP - - a. Cell Configuration Response - Response to Cell Configuration Request from DU APP - - b. Cell Delete Response - Response to Cell Delet request from DU APP - - c. Slice Configuration Respone : Response to Slice Configuration request from DU Manager. - - d. Slice Reconfiguration Request : Response to Slice Reconfiguration request from DU Manager. - - e. Slot Indication : Indication about the ongoing SFN and Slot information to DU APP. - -2. DU APP - RLC Interface - - A. RLC to DU APP - - a. DL RRC Message Response - Informs DU APP if a DL RRC Message was successfuly processed at RLC and sent to MAC. - - b. Slice Performance Metrics - Sends PM to DU APP every 60sec for every Slice configured. - - -3. DU APP - SMO-OAM - - a. Bring cell up - Informs DU to bring a specific cell up - - b. Bring cell down - Informs DU to bring specific cell up - - c. Set the cell operational state - Sets the cell state to ACTIVE/INACTIVE - - d. Raise a cell alarm - Raise an alarm when the cell is ACTIVE/INACTIVE - - e. Slice PM - DU APP sends PM for all Slices in 60sec duration. - -4. MAC - SCH Interface - - A. SCH to MAC - - a. RACH Resource Response : Response to RACH Resource Request for dedicated resource for CF-RA - - b. HARQ Process Release : SCH indicates MAC to release a HARQ process in case a positive acknowledement is received or maximum retransmissions are done already.