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9 This is the API-docs for Cherry relase o-du/l2.
18 This document lists the APIs implemented between various modules of ODU-High and their functionality.
19 These are in line with ORAN-WG8.AAD-v2.05.00, hereafter referred to as AAD Spec.
25 - AAD Spec : section 9.2.1
29 a. Data Transfer(DL) : Transfers DL data to MAC as per Section 9.2.1.1 of the AAD Spec
31 b. Buffer Status Reporting(DL) : Reports DL data volume pending in the RLC entity, as per Section 9.2.1.4 of the
36 a. Data Transfer(UL) : Transfers UL data to RLC as per Section 9.2.1.2 of the AAD Spec
37 b. Schedule Result Reporting (DL) : Reports DL schedule result to RLC as per Section 9.2.1.3 of the AAD Spec
39 2. MAC-Scheduler Interface
41 - AAD Spec : section 9.2.2
45 a. Air Interface Time : Sends timing information over air interface in terms of SFN and slo, as per Section
46 9.2.2.1.1 of the AAD Spec
48 b. Cell Configuration Request : MAC provides SCH the cell configuration as per Section 9.2.2.2.1 of the AAD Spec
50 c. Add UE Configuration Request : MAC provides SCH the configuration/capabilities of a UE as per Section 9.2.2.2.3
53 d. Modify UE Reconfiguration Request : MAC provides SCH the re-configuration of UE, also used to
54 add/release/modify existing bearers, as per Section 9.2.2.2.4 of the AAD Spec
56 e. RACH Indication : MAC receives the RACH Indication and share the contents with SCH as per Section 9.2.2.2.10 of
59 f. DL RLC Buffer Status Information : Reports data volume per LC when it is received at MAC as per Section
60 9.2.2.2.14 of the AAD Spec
62 g. UL Buffer Status Report Indication : On reception and decoding of received BSR from the UE, MAC provides SCH
63 buffer status report for UL scheduling, as per Section 9.2.2.2.16 of the AAD Spec
67 a. Cell Configuration Response - Response to cell configuration request from MAC, as per Section 9.2.2.3.1 of the
70 b. UE Reconfiguration Response - Response to UE reconfiguration request from MAC, as per Section 9.2.2.3.3 of the
73 c. DL Scheduling Information - Provides scheduling information for a given slot for downlink data, as per Section
74 9.2.2.3.5 of the AAD spec.
76 d. UL Scheduling Information - Provides scheduled information for MAC to form the UL_TTI.request towards O-DU Low,
77 as per Section 9.2.2.3.6 of the AAD Spec.
79 e. RAR Information - Informs MAC of uplink scheduling and Msg3 scheduling information, as per Section 9.2.2.3.7 of
82 f. Downlink Control Channel Information - Provides DCI scheduling information for a given slot on PDCCH, as per
83 Section 9.2.2.3.8 of the AAD Spec
85 g. Downlink Broadcast Allocation - Provides DCI and DL data scheduling information for SIB1 for a given slot for
86 Broadcast Channel, as per Section 9.2.2.3.9 of the AAD Spec.
88 3. DU APP - MAC Interface
90 - AAD Spec : section 9.2.3
94 a. Cell Start - Commands MAC to start cell at L1 and to start broadcasting system information, as per Section
95 9.2.3.1 of the AAD Spec.
97 b. UE Create Request - Adds UE information at MAC as per Section 9.2.3.3 of the AAD Spec.
99 c. UE Reconfiguration Request - Reconfigure UE information for a UE already added at MAC, as per Section 9.2.3.5
102 d. DL CCCH Indication - Sends DL CCCH Message to MAC to be sent to UE, as per Section 9.2.3.16 of the AAD Spec.
106 a. UE Create Response - Response to UE Create Request from DU Manager as per Section 9.2.3.4 of the AAD Spec.
108 b. UE Reconfiguration Response - Response to UE Reconfiguration Request from DU APP as per Section 9.2.3.6 of the
111 c. UL-CCCH Indication - Sends the UL CCCH Message received from UE to DU APP as per Section 9.2.3.15 of AAD Spec.
113 4. DU APP - RLC Interface
115 - AAD Spec : section 9.2.4
119 a. UE Create - Adds UE associated RLC entity and related information as per Section 9.2.4.1 of the AAD Spec.
121 b. UE Reconfiguration - Reconfigures the UE associated RLC entity previously added at RLC, as per Section 9.2.4.1
124 c. DL RRC Message Transfer - Requests RLC to deliver RRC message from CU to the UE, as per Section 9.2.4.3 of the
129 a. UL RRC Message Tranfer - Delivers RRC Message from UE to CU as per Section 9.2.4.4 of the AAD spec.
131 b. RRC Message Delivery Report - Informs DU Manager on failed/successful delivery of a DL RRC message to UE, as
132 per Section 9.2.4.5 of the AAD Spec.
137 1. DU APP - MAC Interface
141 a. Cell Configuration Request - Configures cell information at MAC
145 a. Cell Configuration Response - Response to Cell Configuration Request from DU APP
147 2. DU APP - RLC Interface
151 a. UE Create Response - Response to UE Create Request from DU APP
153 b. UE Reconfiguration Response - Response to UE Recofiguration Request from DU APP
155 c. DL RRC Message Response - Informs DU APP if a DL RRC Message was successfuly processed at RLC and sent to MAC.
157 3. DU APP - O1 Interface
159 a. DU sends alarms to O1 for cell up and cell down events using the alarm interface API