UL/DL Config (LTE-Advanced)

Default: 0

Range: 0-6

UL/DL config specifies the uplink-downlink configuration of component carrier x in a TDD Time Division Duplex: A duplexing technique dividing a radio channel in time to allow downlink operation during part of the frame period and uplink operation in the remainder of the frame period. LTE Long Term Evolution-Advanced signal. The uplink-downlink configuration determines which subframes are configured as downlink, which are uplink, and which are special subframes.

There are seven uplink-downlink configurations included in the standard, and they are listed in Table 4.2-2 in 3GPP Technical Specification 36.211.

This parameter only applies to LTE-Advanced Frame Type 2 TDD signals and is only present on the Format tab when Duplex Mode is set to TDD.

For TDD signals, although the LTE Allocation Editor allows downlink resource block allocations to defined in uplink resource blocks , the demodulator will only analyze the part of the allocation that consists of downlink resource blocks and will ignore the part of the allocation that consists of uplink resource blocks.