These first three groups of settings apply to all basic carriers. The Fading parameters are available for Advanced LTE and Advanced LTE-A TDD carriers only.
Some parameters do not apply to the Basic LTE PRACH and Basic LTE-A PRACH.
The frame structure below (Figure 1) is applicable to TDD. Each radio frame of length Tf = 307200*Ts = 10 ms consists of two half-frames of length Tf = 153600*Ts = 5 ms each. Each half-frame consists of five subframes of length 307200*Ts = 1 ms. The supported uplink-downlink configurations are listed in Table 2 where, for each subframe in a radio frame, "D" denotes the subframe is reserved for downlink transmissions, "U" denotes the subframe is reserved for uplink transmissions and "S" denotes a special subframe with the three fields DwPTS, GP and UpPTS. The length of DwPTS and UpPTS is given by Table 1 subject to the total length of DwPTS, GP and UpPTS being equal to 307200*Ts = 1 ms. Each subframe i is defined as two slots, 2i and 2i+1 of length Tslot = 153600*Ts = 0.5 ms in each subframe.
Uplink-downlink configurations with both 5 ms and 10 ms downlink-to-uplink switch-point periodicity are supported.
In case of 5 ms downlink-to-uplink switch-point periodicity, the special subframe exists in both half-frames.
In case of 10 ms downlink-to-uplink switch-point periodicity, the special subframe exists in the first half-frame only.
Subframes 0 and 5 and DwPTS are always reserved for downlink transmission. UpPTS and the subframe immediately following the special subframe are always reserved for the uplink transmission.
Figure 1. Frame Structure type 2 (for 5 ms switch-point periodicity)
Table 1. Configuration of special subframe (lengths of DwPTS/GP/UpPTS).
Table 2. Uplink-downlink configurations.
Range: 0 to 6
Default: 0
Coupling: For Basic, Advanced UL, and Advanced DL LTE-A TDD when Auto Carrier Aggregation Configuration is set to On, this setting is read only for the secondary cells that has the same value as the primary cell.
Double-click or use the drop-down menu to select the uplink-downlink configuration.
The supported uplink-downlink configurations are defined in Table 4.2-2 of 3GPP TS 36.211.
In the case of intra-band carrier aggregation, the PCell parameter is editable, but SCell is read-only. With inter-band carrier aggregation, both parameters are editable.
The resource blocks and some parameters are reconfigured by changing the Uplink Downlink Configuration parameter in the same manner as Predefined Configuration.
Displays the Switch-point periodicity of the frame. Refer to Uplink-downlink allocations (Table 2) in 3GPP TS 36.211.
Display Downlink/Uplink Allocation Configuration. See Table 2 for details.
Range: 0 to 8 (Normal CP), 0 to 6 (Extended CP)
0 to 9 (Normal CP), 0 to 7 (Extended CP)
Default: 0
Coupling: For Basic, Advanced UL, and Advanced DL LTE-A TDD when Auto Carrier Aggregation Configuration is set to On, this setting is read only for the secondary cells that has the same value as the primary cell.
Double-click or use the drop-down menu to select the special subframe configuration. The special subframe configurations are defined in Table 4.2-1 of 3GPP TS 36.211.
Displays the symbol length of DwPTS. See Table 1 for details.
Displays the symbol length of GP. See Table 1 for details.
Displays the symbol length of UpPTS. See Table 1 for details.