Configuring SRB over HSDPA

This section describes how to activate, verify, and deactivate the optional feature WRFD-010652 SRB over HSDPA.

Prerequisites

� Dependencies on Hardware

� Requirement for the BSC6900

� This feature does not depend on the hardware.

� Requirements for the NodeB

� The BTS3812E, BTS3812A, or BTS3812AE is configured with the EBBI, EBOI, or EDLP board.

� The BBU3806 is configured with the EBBC or EBBCd board.

� The BBU3900 is configured with the WBBPb, WBBPd or wBBPf board.

� Dependencies on Other Features

� The WRFD-010610 HSDPA Introduction Package feature must be configured before this feature is configured.

� License

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

� Others

� The UE complies with the specifications of 3GPP Release 6 or higher versions and supports fractional DPCH (F-DPCH) or E-FDPCH.

Context

Using F-DPCH multiplexing, this feature enables downlink signaling radio bearers (SRBs) of multiple users to be carried over HSDPA. This helps reduce downlink code resourceconsumption and call setup delay.

During radio access bearer (RAB) setup, SRBs can be carried over HSDPA only when all the downlink services of the UE are carried on the HSDPA channels. During radio resource control (RRC) connection setup, this feature can be activated by performing the following operations:

Procedure

� Activation Procedure

1. Run the BSC6900 MML command SET UFRCCHLTYPEPARA (CME single configuration: UMTS Radio Global Configuration Express > Basic Resource ControlParameter Configuration > Channel Type Parameters; CME batch modification center: Modifying RNC Parameters in Batches) to set Type of Channel PreferablyCarrying Signaling RB to HSDPA(UL_DCH,DL_HSDSCH) or HSPA(UL_EDCH,DL_HSDSCH).

2. Run the BSC6900 MML command SET UFRCCHLTYPEPARA (CME single configuration: UMTS Radio Global Configuration Express > Basic Resource ControlParameter Configuration > Channel Type Parameters; CME batch modification center: Modifying RNC Parameters in Batches) to set the phase at which this feature is activated by means of the Effective Flag of Signaling RB Channel Type parameter.

NOTE:

� If Effective Flag of Signaling RB Channel Type is set to False, this feature is activated during RAB setup. Recommended Value is False.

� If Effective Flag of Signaling RB Channel Type is set to TRUE, this feature is activated during RRC connection setup.

3. Run the BSC6900 MML command MOD UCELLALGOSWITCH (CME single configuration: UMTS Cell Configuration Express > Cell Parameters > Cell Algorithm Switches; CME batch modification center: Modifying UMTS Cell Parameters in Batches) to set the E_F_DPCH is activated by means of the Cell Hspa Enhanced function switch parameter.

NOTE:

� If Cell Hspa Enhanced function switch is set to E_F_DPCH_ON, E_F_DPCH is enabled.

� If Cell Hspa Enhanced function switch is set to E_F_DPCH_OFF, E_F_DPCH is disabled.

� Verification Procedure

1. Log in to the BSC6900 LMT to enable Uu interface tracing. In the displayed dialog box, select RRC_RB_SETUP, as shown in Figure 1.

Figure 1 Uu Interface Trace dialog box

2. To verify whether this feature is activated , view the information element (IE) dl-TransportChannelType and rb-Identity in the RRC_RB SETUP message from the Uu interface trace data.

� If the value of dl-TransportChannelType is hsdsch, as shown in Figure 2, and the value of rb-Identity is less than or equal to 4, as shown in Figure 3, this feature is

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activated.

Figure 2 Value of the dl-TransportChannelType IE

Figure 3 Value of the rb-Identity IE

� Deactivation Procedure

1. Run the BSC6900 MML command SET UFRCCHLTYPEPARA (CME single configuration: UMTS Radio Global Configuration Express > Basic Resource ControlParameter Configuration > Channel Type Parameters; CME batch modification center: Modifying RNC Parameters in Batches) to set Type of Channel PreferablyCarrying Signaling RB to HSUPA or DCH.

Example

//Activating SRB over HSDPA

//Setting the type of channel on which SRBs are preferably carried with SrbChlType set to HSDPASET UFRCCHLTYPEPARA: SrbChlType=HSDPA;

//Setting the type of channel on which SRBs are preferably carried with SrbChlTypeRrcEffectFlag set to FalseSET UFRCCHLTYPEPARA: SrbChlTypeRrcEffectFlag=False;

//setting the E_F_DPCH function MOD UCELLALGOSWITCH: CellId=1, HspaEnhSwitch=E_F_DPCH_ON;

//Deactivating SRB over HSDPA

//Setting the type of channel on which SRBs are preferably carried with SrbChlType set to DCHSET UFRCCHLTYPEPARA: SrbChlType=DCH;

Parent topic: RAN Feature Activation Guide

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