7. Sub-DL-UL MAP Settings

Sub-DL-UL-MAPs can only be used with the compressed MAPs. They are not used with the normal DL-MAP or UL-MAP. Up to three Sub-DL-UL-MAPs may be enabled. Click to the left of each Sub-DL-UL-MAP to access the settings for that item. The Sub-DL-UL-MAPs are all placed in the first DL-PUSC zone, MAC Messaging to simplify the setup.

By default, the IE for all data burst are placed in the DL-MAP or UL-MAP as appropriate. To specify which Sub-DL-UL-MAP the burst IE will be placed, click the Zone and go the burst table. The last column allows you to specify whether that burst IE should go into a Sub-DL-UL-MAP, and if so, which Sub-DL-UL-MAP it will go into. Note that you still need to enable that Sub-DL-UL-MAP separately in the MAC Messaging setup. 

All the UL-MAP-IEs in one SUB-DL-UL-MAP should come from a single uplink zone. If IE in Sub-Map properties of two or more bursts from different uplink zones are pointed to the same SUB-DL-UL-MAP, an error message will be displayed in the status bar.

The SUB-DL-UL MAP can only be applied when DL-MAP and UL-MAP are set to compressed.

SUB-DL-UL MAP #

Auto SUB-DL-UL MAP

Choices: On, Off

Use the drop-down menu or double-click to turn Auto SUB-DL-UL-MAP on or off. Turn Auto SUB-DL-UL-MAP on to automatically generate a SUB-DL-UL-MAP message and allocate a burst for it. The burst allocation is immediately below the compressed DL-UL-MAP, and has a one-dimensional subchannel axis.

Modulation and Coding

Select the modulation type, coding type, and coding rate from the drop down menu. The type of coding available depends on the burst profile.

Repetition Coding

Choices: None, 2, 4, 6

Select the number of times the coded or uncoded data is repeated. Repetition coding is only available when QPSK 1/2 or QPSK 3/4 is selected for the burst profile (Rate ID). 

Symbol Offset

Displays the starting symbol offset of the SUB-DL-ULMAP burst. (Read-only)

Subchannel Offset

Displays the starting subchannel offset of the SUB-DL-UL MAP burst. (Read-only)

Assigned Slots

Displays the total available Closedslots in this burst based on the number of symbols times the number of subchannels selected.

The definition of an OFDMA slot depends on the OFDMA symbol structure, which varies for downlink and uplink:

When Auto Allocation is set to on in the zone editing window, an algorithm configures the bursts automatically using the specified burst parameters, avoiding any burst overlap, if possible. If Auto Allocation is off, you can manually position and allocate the data region by selecting the number of assigned slots for the zone and the number of symbols and subchannels with their respective offsets in the burst editing window. Any bursts that overlap, exceed the assigned number of slots, or are too small are shown in red and the status bar and parameter status window display a conflict message.

Occupied Slots

Displays how many Closedslots are needed for the burst based on the total length in bytes of all MAC PDUs. It also depends on the rate ID and coding type selected for each burst.

The definition of an OFDMA slot depends on the OFDMA symbol structure, which varies for downlink and uplink:

When Auto Allocation is set to on in the zone editing window, an algorithm configures the bursts automatically using the specified burst parameters, avoiding any burst overlap, if possible. If Auto Allocation is off, you can manually position and allocate the data region by selecting the number of assigned slots for the zone and the number of symbols and subchannels with their respective offsets in the burst editing window. Any bursts that overlap, exceed the assigned number of slots, or are too small are shown in red and the status bar and parameter status window display a conflict message.

In SUB-DL-UL-MAP configuration, Occupied Slots, Symbol Offset and Subchannel Offset are read-only and determined by auto allocation. 'Assigned Slots' is configurable when 'Auto Allocation' of the first downlink PUSC zone is turned off.