Signal Studio controls the ACK/NACK data transmission using an internally defined signal or from an external signal from AUX ports.
Refer to HARQ Process States.
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1. UL-SCH Settings |
2. Hybrid-ARQ Settings |
3. Hybrid-ACK/NACK Data Settings |
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This section defines the LTE/LTE-Advanced FDD DPCCH/DPDCH's buttons. The Restore Default Settings button is available in all of the LTE FDDn Uplink's tree nodes.
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Restores all of the LTE/LTE-Advanced FDD channel's parameters to their default conditions. |
Choice: PN9 | PN15 | Custom Pattern | User Data
Default: PN9
Maximum user data length: 128000 bits
Double-click or use the drop-down menu Payload Data dialog box to select the PUSCH/UL-SCH Data Type.The payload size is determined by the combination of the occupied resource clock size, TBS index, and the modulation type.
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PN9 |
Uses PN9 sequence as data bits |
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PN15 |
Uses PN15 sequence as data bits |
| Custom Pattern | Uses a user-defined sequence as data bits, represented by binary data. |
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User Data |
Uses a user-defined sequence in a file as data bits, represented by binary data. |
Choice: QPSK | 16QAM | 64QAM
Default: QPSK
When Payload Configuration Type in UL-SCH settings is set to TBS Index, double-click or use the drop-down menu to select the Modulation Type for the PUSCH.
When the Transmission Setting Mode is set to Modulation and Coding Scheme (MCS), this value is calculated by the MCS Index. Refer to 3GPP TS36.211, Table 8.6.1-1 for more details.
Choice: TBS index | MCS Index
Default: MCS Index
Double-click or use the drop-down menu to select the method to define the transport block size.
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TBS Index |
Uses the entered values for the TBS index and modulation to define the transport block size. |
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MCS Index |
Uses Table 7.1.7.2.1-1 ( 3GPP TS 36.213) which specifies the permissible combinations of transport block size, resource allocation, and modulation type that are available for transmission. |
Range: 0 to 28
Default: 5
Enter a value for the MCS Index. This parameter is used when Payload Configuration Type is MCS Index, otherwise calculated by TBS Index and the Modulation Type. Refer to 3GPP TS 36.211 Table 8.6.1-1 for the associated values.
Range: 0 to 10 (Modulation type = QPSK), 10 to 19 (Modulation type = 16QAM), 19 to 26 (Modulation type = 64QAM)
Default: 5
Enter a value of TBS Index. This parameter is used when Payload Configuration Type is TBS Index, otherwise calculated by MCS Index. Refer to 3GPP TS36.211, Table 8.6.1-1 for more details.
Range: 16 to 75376
Default: 2216
Displays the payload size in bits of the UL-SCH. The payload size is determined by the combination of the occupied resource block size, TBS index, and the modulation type. Refer 3GPP TS36.213.
Range: 0 to 27
Default: 3
Enter the maximum number of times for the uplink shared channel to be retransmitted.
Range:8 to 65535
Default: 8 subframes
Dependency: Data Source is External
Set the HARQ process length of the initial ACK response. The HARQ response signals to the UL are assumed as all ACKS for the first eight packets because the retransmission data for NACK response is not available at the beginning of the triggered time.
Default: 0, 2, 3, 1
Entry format: Array of RV Index (Integer 0-3)
Array length: 1 to 28
Enter the RV (redundancy version) Index sequence pattern for verifying HARQ responses. The RV Index data can be entered as a sequence with values of 0, 1, 2, 3 separated by commas. When the specified length of RV index sequence pattern is shorter than the maximum number of retransmission, the pattern is repeated until reaching the maximum length.
Figure 1. RV index pattern example
Choice: Internal | External
Default: Internal
Double-click or use the drop-down menu to select HARQ ACK/NACK control signal source.
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Internal |
Uses an internal user-defined signal. |
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External |
Uses an external signal from AUX ports. |
Choice: All ACK, All NACK, Custom Pattern, User Data
Default: All ACK
Maximum length of user data: 8192 patterns
Double-click or use the drop-down menu to select the feedback mode for the HARQ ACK/NACK input port. This parameter is used when the data source is set to Internal.
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All ACK |
All ACK sequence |
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All NACK |
All NACK sequence |
| Custom Pattern |
Uses a user-defined sequence as data bits, specified in a string pattern of 'A' or 'N'. |
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User Data |
Selects a user-defined sequence from an existing file or uses a pattern that you create by entering the character data values: 'A': ACK, 'N': NACK in the Payload Data dialog box. |
Range: 0 to 184320
Default: 30720
Resolution: 16
Enter the delay time of the input port for receiving the feedback signal of the HARQ ACK/NACK. The unit of the delay value is Ts. This parameter is used when the data source is set to External and the data transmission mode is set to Multiplexed.
Range: 3 to 7 [subframes]
Default: 4
Double-click or use the drop-down menu to select the delay of HARQ ACK response of the serial data transmission. The unit of the delay number is subframe. This parameter is used when HARQ ACK/NACK Data Source is External and the AUX Operating Mode is set to Dedicated.
Choice: Choice: NACK | ACK
Default: NACK
Double-click or use the drop-down menu to select the default value of HARQ ACK/NACK response of the serial data transmission when the feedback signal is not received. This parameter is used when HARQ ACK/NACK Data Source is External and the AUX Operating Mode is set to Dedicated.