To configure uplink frame components using MAC PDU frame setup mode:
Click Project 
in the tree view. Ensure that MAC PDU is selected as the Frame Setup Mode
in WiMAX Operation Setup.
Click MAC-Uplink in the tree view. The MAC-Uplink Settings window displays the common uplink parameter settings in the top half and buttons for adding bursts (maximum 16) in the bottom half.
When you use the MAC PDU mode to configure WiMAX signals, the software automatically generates the WiMAX waveform based on your configured MAC description. Click Frame in the tool bar to view a block diagram at the bottom of the window showing how the frame components fit on a time axis.
Use this cell to enter the configuration change count of the UCD. This is encoded in the UL MAP and UCD contents. It is incremented by one (modulo 256) whenever there is an uplink configuration change. Accepted values are 0 (default) to 255.
Use this cell to enter the uplink channel for the message in the UCD. Accepted values are 0 (default) to 255.
Ranging Back-off Start
Use this cell to set the initial backoff window size for initial ranging contention, expressed as a power of 2. This is encoded in the UCD message in the MAC layer. Accepted values are 0 to 15. The default value is 1.
Ranging Back-off End
Use this cell to set the final backoff window size for initial ranging contention, expressed as a power of 2. This is encoded in the UCD message in the MAC layer. Accepted values are 0 to 15. The default value is 7.
Request Back-off Start
Use this cell to set the initial backoff window size for contention bandwidth requests, expressed as a power of 2. This is encoded in the UCD message in the MAC layer. Accepted values are 0 to 15. The default value is 1.
Request Back-off End
Use this cell to set the final backoff window size for contention bandwidth requests, expressed as a power of 2. This is encoded in the UCD message in the MAC layer. Accepted values are 0 to 15. The default value is 7.
This cell displays the timing offset from the start of the frame in terms of an integer number of samples of the sampling frequency. The uplink start time is determined based on the value of the downlink ratio set in the parameter view for TDD signals. The value is zero for FDD.
This cell displays the timing offset from the start of the UL frame in microseconds rounded to an integer number of samples. The uplink start time is determined based on the value of the downlink ratio set in the parameter view for TDD signals. The value is zero for FDD.
This cell displays the size of the RTG as an integer number of samples of the sampling frequency.(If the frame duration mode is continuous, you can edit this cell.) The maximum gap size depends on the sampling rate, oversample ratio, cyclic prefix, and frame size. Editing the Gap Interval [us] recalculates this value rounded to an integer number of samples. The minimum and default value is zero.
This cell displays the size of the RTG in microseconds.(If the frame duration mode is continuous, you can edit this cell.) The maximum gap size depends on the sampling rate, oversample ratio, cyclic prefix, and frame size. Editing the Gap Interval [samples] recalculates this value. The minimum and default value is zero.
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adds a user burst with a default MAC PDU. For each burst (maximum 16), a data grid displays parameters that you can edit by clicking each cell. You can also edit a full set of parameters and add up to eight MAC PDUs per burst in the UL User window. See Editing Tip. Editing Tip: In the MAC-Uplink Settings window, double-click the first column of the burst you wish to edit or click the burst of interest in the tree view. This displays the burst editing window. To return to the previous window, click MAC-Uplink in the tree view. See UL User for parameter definitions.
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deletes a previously added burst. |
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adds a burst that has the same configuration as the currently selected burst. |
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swaps the currently selected burst with the one above it or just below it in the table for that link. |
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