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Configuring HSUPA UL Interference Cancellation

This section describes how to activate, verify, and deactivate the optional feature WRFD-010691 HSUPA ULInterference Cancellation.

Prerequisites

Dependencies on Hardware

Dependencies on BSC6900 Hardware

This feature does not have any special requirements for hardware.

Dependencies on NodeB Hardware

The BTS3812E or BTS3812AE must be configured with the EULPd board,the downlink service cannot be estabilished on HBBI/HDLP/NDLP, and theIC effect cannot be shared between BB boards.

The DBS3800 must be configured with the EBBCd board and the IC effectcan be shared between the BB boards.

The 3900 series base stations must be configured with the WBBPd or WBBPf board, and only if slot 2 or 3 is configured with at least one WBBPdor WBBPf board, IC effect can be shared between the WBBPd or WBBPf boards.

WBBPd/WBBPf is needed for 3900 series NodeB to support HSUPA ULInterference Cancellation. If the inter-board sharing IC need to be supported,the WBBPd/WBBPf should be configured in the UL resource pool whichused for inter-board sharing IC, and at least 1 WBBPd/WBBPf should beconfigured in slot 2 or 3.

Dependencies on Other Features

WRFD-010612 HSUPA Introduction Package.

License

The license controlling this feature has been activated. For details on how to activate thelicense, see Activating the UMTS License . For details about license items, see Feature

Activation and License Item Descriptions .

Context

CAUTION: Activate this feature when the traffic volume in a cell is low. The reason is that the cell must be deactivatedbefore this feature is activated; after the cell is deactivated, the services in this cell are disrupted.

Interference Cancellation (IC) is performed to cancel the interference caused by the uplink high rate E-DPDCHdata of other users, improving the demodulation signal-to-noise ratio (SNR) and increasing the uplink capacityof the UMTS network.

NOTE:

For 3900 series base stations, the WBBPd/WBBPf must be configured on slot 2 or slot 3 on theBBU3900 to support the uplink data IC integrated interference cancellation function. The uplinkresource group must contain the WBBPd/WBBPf. Therefore, cell of the group can support the ICfeature. For details, see Adding a Baseband Board to a 3900 Series Base Station .If the DBS3800 is configured with two EBBCd boards, it is recommended that two uplink resource

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groups be allocated to the two boards separately. In this way, both the boards support HSUPAuplink interference cancellation. For details about how to configure the active and standby BTSs,see Adding an EBBC or EBBCd .If the BTS3812E or BTS3812AE is configured with two EULPd boards, it is recommended that twouplink resource groups be allocated to the two boards separately. In this way, both the boardssupport HSUPA uplink interference cancellation. For details about how to configure the active andstandby BTSs, see Adding a Baseband Board to the BTS3812E or BTS3812AE .

Procedure

Activation Procedure

If the UMTS cell has been activated, run the BSC6900 MML command DEA UCELL(CME single configuration: UMTS Cell Configuration Express > Cell BasicInformation > Cell Basic Information . Set Validation indication to Deactivated ;CME batch modification center: Modifying UMTS Cell Parameters in Batches ) todeactivate the cell.

1.

Run the NodeB MML command MOD LOCELL (CME single configuration: NodeBConfiguration Express > IUB_NodeB > Radio Layer > xx Sector > Locell ; CMEbatch modification center: Modifying Physical NodeB Parameters in Batches ) to modifythe local cell. In this step, set IC to TRUE .

2.

Run the BSC6900 MML command ACT UCELL (CME single configuration: UMTS CellConfiguration Express > Cell Basic Information > Cell Basic Information . SetValidation indication to Activated ; CME batch modification center: Modifying UMTSCell Parameters in Batches ) to activate the cell.

3.

Run the NodeB MML command SET RESALLOCRULE (CME single configuration:NodeB Configuration Express > IUB_NodeB > Basic Information > RadioManagement > RESALLOCRULE ; CME batch modification center: not supported). Inthis step, set Auto Rebuild Cell Switch to ON(ON) and set Cs User Number Threshold and Ps User Number Threshold . If the number of CS users or the number of PS CELL_DCH users in the downlink resource group is equal or smaller than thecorresponding threshold, the local cells are reestablished automatically.

4.

Verification Procedure

Run the NodeB MML command DSP LOCELL to query the status of a specified localcell.

Expected result: The value of IC MODE is ENABLED .

1.

Run the NodeB MML command LST RESALLOCRULE .

Expected result: The value of Auto Rebuild Cell Switch is ON .

2.

Select Service > Realtime Specific Monitoring > Cell RTWP from the navigation treein Maintenance tab on NodeB LMT, as shown in Figure 1 . The column 1-3 indicatesthe state of this feature disabled, the column 1-4 indicates the state of this feature

enabled. If the value of column 1-4 is less than the value of column 1-3 , it indicates thefeature has been enabled.

Figure 1 Cell RTWP 1

3.

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Deactivation Procedure

Run the NodeB MML command MOD LOCELL (CME single configuration: NodeBConfiguration Express > IUB_NodeB > Radio Layer > xx Sector > Locell ; CMEbatch modification center: Modifying Physical NodeB Parameters in Batches ) to modifythe local cell. In this step, set IC to FALSE .

1.

Example

//Activation procedureDEA UCELL: CellId=1;MOD LOCELL: LOCELL=1, SECT=LOCAL_SECTOR, IC_MODE=TRUE;ACT UCELL: CellId=1;SET RESALLOCRULE: SW=ON, CSUSERNUM=0, PSUSERNUM=0;

//Verification procedureDSP LOCELL: LOCELL=1;LST RESALLOCRULE:;

//Deactivation procedureMOD LOCELL: LOCELL=1, SECT=LOCAL_SECTOR, IC_MODE=FALSE;

Parent topic: RAN Feature Activation Guide

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