DL-SCH Tx sequence Window (Advanced LTE FDD Downlink)

Select a DL-SCH channel in the Channel Setup node, then click the button in the Transmission Configuration cell to open the DL-SCH Tx sequence window.  

The DL-SCH TX window displays the transmission sequence defined in the Channel Setup node for the selected DL-SCH channel.

You can make adjustments to the MCS index, RV index, VRB type, VRB offset, VRB size, and scrambling for each DL-SCH transmission from within the DL-SCH Tx sequence window.

The settings configured in the Channel Setup node and the DL-SCH Tx sequence window are displayed in the Tx Map.

Use the Import tab to navigate to and import a saved transmission sequence.

Use the Export tab to save the current transmission sequence to a file.

Click the Column Preset button to access a drop-down list that enables you to set parameters for all transmissions to the same value.

DL-SCH Tx sequence window

Sequence

Frame

Subframe

State

MCS #1 | 2

Mod #1 | 2

TBS #1 | 2

TB Size #1 | 2

Retrans #1 | 2

N_1A_PRB (for SI-RNTI or P-RNTI)

RV #1 | 2

RA Type

Subset

Shift

RBG Bitmap

VRB Type

RB Offset

RB Size

RB Gap

Sequence

Displays the sequential number.

Frame

Displays the radio frame number.

Subframe

Displays the subframe number (0 to 9) in a radio frame.

State

Choice: On | Off

Double-click or use the drop-down menu to turn the subframe state on or off.

When this parameter is on, other settings on this subframe are visible. Otherwise they are invisible.

When the DL-SCH parameter RNTI = 65535 (SI-RNTI) case, default is “Off” and there is no restriction for transmittable subframe. Otherwise “On”.

MCS #1 | 2

Choice: Off | 0 to 31

Default: 0

Double-click or use the drop-down menu to select MCS index for the subframe.

DL-SCH parameter RNTI = 1 to 65523 (C-RNTI) case, this parameter is as follows:

DL-SCH parameter RNTI = 65535 (SI-RNTI) case, this parameter is as follows:

For more details, refer to 3GPP TS 36.213.

Mod #1 | 2

Choice: QPSK | 16QAM | 64QAM

Double-click or use the drop-down menu to select modulation type for the subframe.

DL-SCH parameter RNTI = 1 to 65523 (C-RNTI) case, this parameter is as follows:

DL-SCH parameter RNTI = 65535 (SI-RNTI) case, this parameter is as follows:

For more details, refer to 3GPP TS 36.213.

TBS #1 | 2

Choice: Off | 0 to 26

Double-click or use the drop-down menu to select TBS Index for the subframe.

DL-SCH parameter RNTI = 1 to 65523 (C-RNTI) case, this parameter is as follows.

DL-SCH parameter RNTI = 65535 (SI-RNTI) case, this parameter is as follows.

For more details, refer to 3GPP TS 36.213.

TB Size #1 | 2

Range: 1 to 1736 (DCI Format 1C)

1 to 75376 (DCI Format 1A or 1e Antenna Configuration)

1 to 149776 (2 or 4 Antenna Configuration)

Where TBS = Off, this parameter is available to change value by manual. Otherwise (0 to 26) automatically determined as read only parameter.

Where MCS = 29 to 31 case is exception, TBS, TB Size and Mod is available to change by manual.

For more details, refer to 3GPP TS 36.213.

Retrans #1 | 2

Choice: Off | On

Sets the re-transmission process of the transport block 1 (codeword 0) for the corresponding PDSCH transmission. (Toggle the new data indicator state or not.)

On: Re-transmission data with next RV index is transmitted. (The new data indicator is not toggled.)

Off: New data is transmitted. (The new data indicator is toggled.)

First transmission of each process is not available to set re-transmission.

For example, if the Number of HARQ Processes is 8 (Assigned Process is 0-7) and every subframe transmission is on, the re-transmission is not available to the eighth transmission from the first transmission.

This parameter appears only when UE Type is set to Non-BL/CE.

See 3GPP TS 36.212 and 36.213, for more information.

N_1A_PRB (for SI-RNTI or P-RNTI)

This parameter selects the number of physical resource blocks.

RV #1 | 2

This parameter indicates RV Index for each subframe respectively.

Where DL-SCH parameter RNTI = 1 to 65523 (C-RNTI) and RV Index Configuration = Auto case, this parameter is automatically decided by both RV Index Sequence and ReTrans parameters.

Where DL-SCH parameter RNTI = 65535 (SI-RNTI), this parameter is set to manually.

For more details, refer to 3GPP TS 36.321.

RA Type

Choice: Type 0 | Type 1 | Type 2

Default: Type 0

Double-click or use the drop-down menu to select the downlink resource allocation type.

Type 0: Allocation of Virtual Resource Blocks (VRBs) of localized type is defined by RBG Bitmap.

Type 1: Allocation of VRBs of localized type is defined by Subset, Shift and RBG Bitmap.

Type 2: Allocation of VRBs is defined by VRB Type, RB Offset and RB Size.

See 3GPP TS 36.213 7.1.6 for more information.

Subset

Range:

0 (System Bandwidth = 1.4 MHz)

0 to 1 (System Bandwidth = 3 MHz or 5 MHz)

0 to 2 (System Bandwidth = 10 MHz)

0 to 3 (System Bandwidth = 15 MHz or 20 MHz)

Default: 0

Enter Subset of DL-SCH.

The parameter is visible when all of the following conditions are met.

- DL-SCH State is On.

- RA Type is Type 1.

- Subframe State is On.

- ABS is Off or ABS is On and ABS Pattern info indicates 0 for the corresponding subframe.

Otherwise, this parameter is invisible and not applicable.

See 3GPP TS 36.213 7.1.6.2 for more information.

Shift

Choice: Off | On

Default: Off

Double-click or use the drop-down menu to turn Shift of DL-SCH on or off.

The parameter is visible when all of the following conditions are met.

- DL-SCH State is On.

- RA Type is Type 1.

- Subframe State is On.

- ABS is Off or ABS is On and ABS Pattern info indicates 0 for the corresponding subframe.

Otherwise, this parameter is invisible and not applicable.

See 3GPP TS 36.213 7.1.6.2 for more information.

RBG Bitmap

Length:

6 (System Bandwidth = 1.4 MHz and RA Type = Type 0 or System Bandwidth = 3 MHz and RA Type = Type 1)

8 (System Bandwidth = 3 MHz and RA Type = Type 0)

11 (System Bandwidth = 5 MHz and RA Type = Type 1)

13 (System Bandwidth = 5 MHz and RA Type = Type 0)

14 (System Bandwidth = 10 MHz and RA Type = Type 1)

16 (System Bandwidth = 15 MHz and RA Type = Type 1)

17 (System Bandwidth = 10 MHz and RA Type = Type 0)

19 (System Bandwidth = 15 MHz and RA Type = Type 0)

22 (System Bandwidth = 20 MHz and RA Type = Type 1)

25 (System Bandwidth = 20 MHz and RA Type = Type 0)

Default: 17 (all “1”)

Use the Bitmap Edit dialog box to set RBG Bitmap of DL-SCH.

Value 0 indicates that corresponding RBG is allocated.

Value 1 indicates that corresponding RBG is not allocated.

The parameter is visible when all of the following conditions are met.

- DL-SCH State is On.

- RA Type is other than Type 2.

- Subframe State is On

- ABS is Off or ABS is On and ABS Pattern info indicates 0 for the corresponding subframe.

Otherwise, this parameter is invisible and not applicable.

See 3GPP TS 36.213 7.1.6.1 and 7.1.6.2 for more information.

When System Bandwidth is less than or equal to 10 PRBs, Resource Allocation Type is automatically set to Type 0.

VRB Type

Choice: Localized | Distributed

Default: Localized

Double-click or use the drop-down menu to select the virtual resource block type for the subframe.

Where DL-SCH parameter RNTI = 1 to 65523 (C-RNTI) and RA Type = Type2 case, this parameter is available to select Localized or Distributed.

Where DL-SCH parameter RNTI = 65535 (SI-RNTI), this parameter is as follows:

For more details, refer to 3GPP TS 36.211 and 36.213.

RB Offset

Range: Depends on relative parameters as follows:

Enter the RB offset for the subframe.

For more details, refer to 3GPP TS 36.213.

RB Size

Range: Depends on relative parameters as follows.

Enter the RB size for the subframe.

For more details, refer to 3GPP TS 36.213.

RB Gap

Choice: Ngap, 1 | Ngap, 2

Double-click or use the drop-down menu to select the RB Gap for the subframe.

Only VRB Type = ‘Distributed’ case this parameter is visible.

VRB Type = Distributed and System BW >= 50 case, this parameter is selectable by manual.

VRB Type = Distributed and System BW < 50 case, this parameter is read only and Ngap, 1.

For more details, refer to 3GPP TS 36.213.