F1 Ap Tab

The F1-AP tab is named SN-F1 (for Secondary Node configuration) on the gNB CU SA Nodal when MR-DC is enabled on the NAS-5G MM Tab. The Tcl parameters below start with "Sn".

Version (38.743)

Select the proprietary version of the application from the dropdown list. Available in gNB CU NSA / SA Nodals and gNB CU Node test cases.

Note : When 15.7.0-Variant1/Oct2019 is selected, the NAS-5G/PDU session establishment will accept piggybacked in UEContextSetupRequest/RRCContainer.

When SA Mode = Vendor 3 on gNB CU Node test case, only 15.3.0/Sep2018 and 15.7.0/Oct2019 are available for selection.

Options: 15.3.0/Sep2018, 15.7.0/Oct2019, 15.7.0-Variant1/Oct2019, 16.3.1/Oct2020, 16.6.0/July2021

In the RIC Nodal Test Case, the F1 interface contains F1-AP (F1-AP DU) and (F1-AP CU) tabs. Version 16.6.0/July2021 or greater is supported.

Default: 15.3.0/Sep2018

Tcl Parameters: F1apVersion

Tcl Parameters: GnbDuF1apVersion

Tcl Parameters: GnbCuF1apVersion

Tcl Parameters: SnF1apVersion

PCI

PCI has been moved to gNB-DU Control Node.

NR Mode Type

Select the New Radio (NR) mode type. Options are Frequency Division Duplex (FDD) or Time Division Duplex (TDD). In FDD mode, both uplink and downlink can transmit at the same time at different spectrum frequencies. In TDD, both uplink and downlink use the same spectrum frequencies but at different times.

Available in gNB CU NSA / SA Nodals test cases.

Options : TDD or FDD

The SN-F1 (for Secondary Node configuration) on the gNB CU SA Nodal only supports type = "TDD".

Note : NR Mode Type of F1 interface must be the same as NR Mode Type of SN-F1 interface.

In the RIC Nodal Test Case, the F1 interface contains F1-AP (F1-AP DU) and (F1-AP CU) tabs.

Tcl Parameters: F1apNrModeType

Tcl Parameters: SnF1apNrModeType

Tcl Parameters: GnbDuF1apNrModeType

FDD - Frequency Division Duplex

The FDD Pane becomes available for input when NR Mode Type = FDD. Available in gNB CU NSA / SA Nodals test cases.

In the RIC Nodal Test Case, the F1 interface contains F1-AP (F1-AP DU) and (F1-AP CU) tabs.

Uplink ARFCN	Enter the uplink for Absolute Radio-Frequency Channel Number (ARFCN). An ARFCN defines a pair of Radio Frequency (RF) channel frequencies for uplink and downlink use. Range : 0 to 3279165 Default: 0 Tcl Parameter: F1apFddUlArfcn Tcl Parameter: GnbDuF1apFddUlArfcn
Downlink ARFCN	Enter the downlink for Absolute Radio-Frequency Channel Number (ARFCN). An ARFCN defines a pair of Radio Frequency (RF) channel frequencies for uplink and downlink use. Range : 0 to 3279165 Default: 0 Tcl Parameter: F1apFddDlArfcn Tcl Parameter: GnbDuF1apFddDlArfcn
Uplink SCS	Enter the uplink for Sub-Carrier Spacing (SCS). Range : 0 to 3 Default: 0 Tcl Parameter: F1apFddUlScs Tcl Parameter: GnbDuF1apFddUlScs
Downlink SCS	Enter the downlink for Sub-Carrier Spacing (SCS). Range : 0 to 3 Default: 0 Tcl Parameter: F1apFddDlScs Tcl Parameter: GnbDuF1apFddDlScs
Uplink RNRB	Enter the uplink for New Radio Bandwidth (RNRB). Range : 0 to 28 Default: 0 Tcl Parameter: F1apFddUlRnrb Tcl Parameter: GnbDuF1apFddUlRnrb
Downlink RNRB	Enter the downlink for New Radio Bandwidth (RNRB). Range : 0 to 28 Default: 0 Tcl Parameter: F1apFddDlRnrb Tcl Parameter: GnbDuF1apFddDlRnrb
Frequency Band Indicators NR	Select 1 Number of Frequency Band Indicators to support FreqBandIndicatorNR IE from the options listed below. Options : n1,n2,n3,n5,n7,n8,n12,n13,n14,n18,n20,n24,n25,n26,n28, n30,n65,n66,n70,n71,n74,n85,n91,n92,n93,n94 Tcl Parameter: F1apFddNumFbi Tcl Parameter: F1apFddFbi_1 Tcl Parameter: GnbDuF1apFddNumFbi Tcl Parameter: GnbDuF1apFddFbi_1

TDD Time Division Duplex

The TDD Pane becomes available for input when NR Mode Type = TDD. Available in gNB CU NSA / SA Nodals test cases. The SN-F1 (for Secondary Node configuration) on the gNB CU SA Nodal only supports type = "TDD".

In the RIC Nodal Test Case, the F1 interface contains F1-AP (F1-AP DU) and (F1-AP CU) tabs.

ARFCN	Enter the Absolute Radio-Frequency Channel Number (ARFCN). An ARFCN defines a pair of Radio Frequency (RF) channel frequencies for uplink and downlink use. Range : 0 to 3279165 Default: 0 Tcl Parameter: F1apTddArfcn Tcl Parameter: GnbDuF1apTddArfcn Tcl Parameter: SnF1apTddArfcn
SCS	Enter the Sub-Carrier Spacing (SCS). Range : 0 to 3 Default: 0 Tcl Parameter: F1apTddScs Tcl Parameter: GnbDuF1apTddScs Tcl Parameter: SnF1apTddScs
RNRB	Enter the New Radio Bandwidth (RNRB). Range : 0 to 28 Default: 0 Tcl Parameter: F1apTddRnrb Tcl Parameter: GnbDuF1apTddRnrb Tcl Parameter: SnF1apTddRnrb
Frequency Band Indicators NR	Select 1 Number of Frequency Band Indicators to support FreqBandIndicatorNR IE from the options listed below. Options : n34,n38,n39,n40,n41,n46,n47,n48,n50,n51,n53,n77,n78,n79, n90,n96,n257,n258,n260,n261 Tcl Parameter: F1apTddNumFbi Tcl Parameter: F1apTddFbi_1 Tcl Parameter: GnbDuF1apTddNumFbi Tcl Parameter: GnbDuF1apTddFbi_1 Tcl Parameter: SnF1apTddNumFbi Tcl Parameter: SnF1apTddFbi_1

RLC Mode

Select the Radio Link Control (RLC) data PDU mode. Per spec 3GPP TS 38.322 section 4.2.1. Available in gNB CU Node test case.

Per F1- AP 38.473, "rlc mode" is shown in UE Context Setup Request + Modification Request on F1 interface from CU to DU.

Per X2AP 36.423 + E-UTRA & NR MC 37.340, if RLC_AM mode, eNB needs to send SN Status Transfer message after SgNBReconfigurationComplete on X2 interface.

RLC-AM ( Acknowledged Mode )
RLC-UM-Bidirectional ( Unacknowledged Mode )

Tcl Parameter: F1apRlcMode

Response Time (ms)

Enter the response time in milliseconds.

Available in gNB CU Node test case.

Range : 100 to 5000

Default : 1000

Tcl Parameters: F1apResponseTime

Enable UE Capability Enquiry

Select to enable UE Capability Enquiry to accommodate additional security mode commands after the initial NAS exchange is completed.

Available when SA Mode is enabled on the gNB CU node test case.

Tcl Parameter: F1apUeCapEnquiryEn

SDAP UL Header

Select to indicate if SDAP UL Header is "Present" or "Absent". Reference 37.324.

Options : Present, Absent

Available when SA Mode is enabled on the gNB CU node test case.

Tcl Parameter: F1apSdapUlHdr

SDAP DL Header

Select to indicate if SDAP UL Header is "Present" or "Absent". Reference 37.324.

Options : Present, Absent

Available when SA Mode is enabled on the gNB CU node test case.

Tcl Parameter: F1apSdapDlHdr

CU Configuration Update

Cell Activation

Cell Deactivation

Cell Modification

Cell Barring

Select the cell activation type. When SA Mode is enabled on the gNB CU node test case, all options are available. Only Cell Activation and Deactivation are available in NSA Mode.

Spec reference : 3GPP 38.473, O-RAN.WG5.C.1, O-RAN.WG5.IOT.0

The gNB-CU initiates the procedure by sending a GNB-CU CONFIGURATION UPDATE message including the appropriate updated configuration data to the gNB-DU. The gNB-DU responds with a GNB-CU CONFIGURATION UPDATE ACKNOWLEDGE message to acknowledge that it successfully updated the configuration data. The procedure is between gNB-CU and gNB-DU over the F1ap interface. The below flow shows the Cell Activation procedure which is used to report Service status of the activated cells.

Cell modification/deactivation/barring will be done after the a cell activation procedure. This cell activation procedure can be with or without gnbConfigUpdate option, here is an example of the messages included when Cell is deactivated after cell activation is done via gnbConfigUpdate.

Cell deactivation: Cell activation done first through F1SetupRsp.

Limitation / Caveat

Cell Activation - All cells activated.
Cell Modification - All activated cells are modified with SIB info.
Cell Deactivation/Barring - at least 2 cells have to be configured. The last cell is deactivated/barred.

Tcl Parameter: F1apCellActEn

Tcl Parameter: F1apCellDeactEn

Tcl Parameter: F1apCellModEn

Tcl Parameter: F1apCellBarEn

Reset

Select to "Include UE F1-AP ID" for gNB-CU initiated Reset procedure for NR Stand-Alone.

Per O-RAN.WG5.C.1-v07.00.docx section 4.2.2.3.

Select to "Include UE F1-AP ID" .

Options : CU UE F1AP ID (default), DU UE F1AP ID, Both

Available when SA Mode is enabled on the gNB CU node test case.

Tcl Parameter: F1apResetOption

F1 Reset

Available in gNB CU SA Nodal test case and gNB CU Node test case. Select for gNB-DU initiated Reset. Per O-RAN.WG5.C.1-R003 : Section 4.2.2.4.

Select Reset Mode - Options : Reset All or Partial Reset. (not available on gNB CU Node test case).

When Partial Reset is selected enter the Starting SUPI range and Ending SUPI.

Range : 14 or 15 digits

Select to "Include UE F1-AP ID".

Options : CU UE F1AP ID (default), DU UE F1AP ID, Both

Tcl Parameter: F1apResetMode

Tcl Parameter: F1apResetSupiStart

Tcl Parameter: F1apResetSupiEnd

Tcl Parameter: F1apResetIncUeF1apId

System Information

Available in gNB CU SA Node test case. Select for sending System Information Delivery procedure to command the gNB-DU to broadcast the requested Other System Information (OSI). The procedure uses non-UE associated signaling.

Spec reference : O-RAN.WG5.C.1-v07.00 (O-RAN Open F1/W1/E1/X2/Xn Interfaces Working Group NR C-plane profile): section 6.11

TS38.473 (F1 application protocol): section 8.6

Select Send System Information Delivery Command - If this option is enabled, CU will send a System Information Delivery Command message to DU node after all UEs complete the registration at CU node for all F1 interfaces (CU ↔ DU pairs)

When enabled, enter the Send Delay timer value (in seconds) for sending System Information Delivery Command message..

Range : 1 to 65535

Default : 1

Enter the Broadcasted Other System Information Type in the sending System Information Delivery Command message. Select the SI type ('SIB' refers to "System Information Block") from the available panel. Currently SIB2 to SIB9 are supported.

Options : SIB2 to SIB9

Default : SIB2

Tcl Parameter: F1apSidcSendEn

Tcl Parameter: F1apSidcSendDelay

Tcl Parameter: F1apBroadSysInfoType

F1 Setup Failure

F1 Setup

Available in gNB CU SA Node test case. Select for F1 Setup Procedure - Unsuccessful Operation Failure IE per spec reference : TS38.473 (F1 Setup Procedure - Unsuccessful Operation): section 8.2.3.3

Select F1 Setup Falure with Time to Wait (ms) - If the F1 SETUP FAILURE message includes the Time to Wait IE the gNB-DU will wait at least for the indicated time before reinitiating the F1 setup towards the same gNB-CU.

Select the time to wait in milliseconds. Options : 1000 (default), 2000, 5000, 10000,

20000, 60000

When enabled, enter the Send F1 Setup Failure Num.

Range : 1 to 255

Default : 2

On the gNB CU SA Nodal test case F1-AP , select to enter the F1 Setup Max Retry to initiate the retry process.

Range : 1 to 255

Default : 2

On the gNB CU SA Nodal test case F1-AP , enter the Response Time (ms) for the retry process.

Range : 100 to 5000

Default : 1000

Tcl Parameter: F1apFailTimeToWaitEn

Tcl Parameter: F1apFailTimeToWaitTimer

Tcl Parameter: F1apFailNum

Tcl Parameter: F1apSetUpMaxRetryEn

Tcl Parameter: F1apSetUpMaxRetryNum

Tcl Parameter: F1apRespTimeValue

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