The aforementioned means may be one or more of the aforementioned components of the apparatus 1602 and/or the processing system 1714 of the apparatus 1602′ configured to perform the functions recited by the aforementioned means. As described supra, the processing system 1714 may include the TX Processor 368, the RX Processor 356, and the controller/processor 359. As such, in one configuration, the aforementioned means may be the TX Processor 368, the RX Processor 356, and the controller/processor 359 configured to perform the functions recited by the aforementioned means.

FIG. 18 is a flowchart 1800 of a method of wireless communication. The method may be performed by a base station such as an eNB, gNB, etc. (e.g., the eNB 102, 310, the apparatus 1902/1902′). At 1802, the eNB transmits a carrier aggregation configuration comprising a first, downlink, CC and a second CC to a UE, the first CC being a TDD CC, the configuration including downlink portions and excluding uplink portions of the first CC for data transmission by the UE. At 1804, the eNB receives an indication of a capability from the UE. The indication of the capability may comprise an indication of a number of uplink carriers on which the UE can transmit concurrently. The indication of the capability may comprise an indication of a switching time of the UE when transitioning between an uplink transmission on the first CC and an uplink transmission on the second CC.

Then, the eNB performs at least one of receiving an uplink transmission from the UE on a second CC at 1806, transmits a downlink transmission to the UE on the second CC at 1808, or receives the SRS in the uplink portion of the first CC at 1810.