Reverse Data Transmission Mode

Last updated: July 22, 2008

This section is only applicable to the lab application and to a test application with the required feature license.

The Subtype 3 and Subtype 4 Reverse Traffic Channel MAC Protocol defines two transmission modes, High Capacity and Low Latency. The Reverse Data Transmission Mode determines which transmission mode is configured for the active MAC flow for the R-Data channel.

• When the test set is in Active Cell operating mode and the RETAP is being configured for the subtype 2 physical layer, the test set controls the R-Data transmission mode by sending the RETAP Parameter Assignment Message to the AT with the associated LinkFlowID field of the BurstPeriodMode and BurstSizeMode attributes set to the specified Reverse Data Transmission Mode (see FETAP/RETAP Parameter Assignment Messages Versus ETAP Setting for details).
• When the test set is in Active Cell operating mode and the RMCTAP is being configured for the subtype 3 physical layer, the test set controls the R-Data transmission mode by sending the RMCTAP Parameter Assignment Message to the AT with the associated LinkFlowID field of the BurstPeriodMode and BurstSizeMode attributes set to the specified Reverse Data Transmission Mode (see FMCTAP/RMCTAP Parameter Assignment Messages for details).

The specified transmission mode is displayed on the Call Setup screen in the Application Configuration window.

The transmission mode being configured for the R-Data channel determines the current TxT2P gain (see TxT2P Gain Settings ).

Note that in the following situation, the High Capacity transmission mode is assumed to be used by the AT. For signaling, High Capacity mode for MAC flow 00 is always used.

• The test set is in Active Cell operating mode with FETAP or Default Packet Application (DPA) being configured for the physical layer subtype 2.
• The test set is in Active Cell operating mode with FMCTAP being configured for the physical layer subtype 3.

The Reverse Data Transmission Mode is also applicable to IS-856 Test operating mode with Physical Layer Subtype set to the subtype 2 or subtype 3 (See Release A Physical Layer Subtype or Release B Physical Layer Subtype ).