Configure UCI Window (Basic LTE TDD Uplink)

Before adding a UCI channel as described below, delete any existing transport channel, physical channel, or resource block group that occupies the resource blocks that your new UCI channel will occupy. If you add a new UCI channel without first deleting a conflicting channel or resource block group, a "code conflicted" error occurs when you generate the waveform.

The physical uplink control channel, UCI, carries uplink control information. The UCI is never transmitted simultaneously with the PUSCH from the same UE. For frame structure type 2, the UCI is not transmitted in the UpPTS field.

The physical uplink control channel supports multiple formats as shown in Table 1. Formats 2a and 2b are supported for normal cyclic prefix only.

PUCCH Format	SRS Support	Modulation
1	x	n/a
1a	x	BPSK
1b	x	QPSK
2	n/a	QPSK
2a	n/a	QPSK + BPSK
2b	n/a	QPSK + QPSK

All PUCCHformats use a cyclic shift of a sequence in each symbol, where

is used to derive the cyclic shift for the different UCI formats. The quantity

varies with the symbol number l and the slot number n according to

where the pseudo-random sequence generator shall be initialized with

at the beginning of each radio frame.

The physical resources used for UCI depends on two parameters,

and

, given by higher layers. The variable

denotes the bandwidth in terms of resource blocks that are reserved exclusively for UCI formats 2/2a/2b transmission in each slot. The variable

denotes the number of cyclic shift used for UCI formats 1/1a/1b in a resource block used for a mix of formats 1/1a/1b and 2/2a/2b. The value of is an integer multiple of

within the range of {0, 1, …;, 8}, where

is defined in section 5.4.1. No mixed resource block is present if

. At most one resource block in each slot supports a mix of formats 1/1a/1b and 2/2a/2b. Resources used for transmission of UCI format 1/1a/1b and 2/2a/2b are represented by the non-negative indices

and

, respectively.

Click the Add Channel button

in the Transport Channel node and select UCI to open the Configure UCI window. Figure 1 shows the Configure UCI window with the default settings.

Format

Enter a format number for the UCI. The modulation type and number of bits per subframe for each format is shown in the following table.

Format 2/2a is not allowed to be set where the Cyclic Prefix parameter is set to Extended CP.

Modulation Type

Displays the modulation type for the UCI for the selected format as shown in the table above.

Subframe Number

Enter the number(s) of the subframe(s) that the UL-SCH will occupy. You can enter the number of a single subframe, two or more subframes separated by commas, or a range of subframes (for example, 1-3)

N_RB(2)

N_CS(1)

nPUCCH(1)

A resource used for transmission of a PUCCH format 1/1a/1b is represented by the non-negative indices

This is one of the values used for generating and mapping PUCCH and DMRS PUCCH (see 3GPP TS 36.211).

nPUCCH(2)

A resource used for transmission of a PUCCH format 2/2a/2b is represented by the non-negative indices .

This is one of the values used for generating and mapping PUCCH and DMRS PUCCH (see 3GPP TS 36.211).

nPUCCH(3)

Delta Shift

Enter a delta shift value which is used to calculate the cyclic shift alpha for the UCI.

Resource Blocks

Displays the numbers of the resource blocks occupied by the UCI, separated by a comma. If you change the mapping area size, mapping area offset, or first resource block number, the resource block numbers are updated accordingly when you click in this cell.

Group/Sequence Hopping

Double-click or use the drop-down menu to enable the hopping type for the selected transmission.