In one example, a collision may be defined as two or more transmissions in the same subframe. In another example, a collision may also be defined as two or more transmissions in the same symbol. For the former, it implies that simultaneous transmissions over two or more component carriers are not allowed, even if the transmissions may happen over different symbols in the same subframe and within each symbol there is only one transmission in the same subframe. For the latter, it implies that it is possible to have two or more transmissions in the same subframe, as long as within each symbol there is only one transmission in the same subframe. For example, PUSCH/PUCCH 718 is scheduled for subframe 7 of radio frame 714 on CC1 702. However, SRS 708 is also scheduled for transmission on the same subframe 7 of radio frame 714, but on TDD CC 704. If both transmissions were allowed to proceed, there would be simultaneous transmission from the UE on two separate CCs. When such a collision event is identified, the UE may adjust the transmission of SRS 708 or of PUSCH/PDCCH 718 to maintain a single transmission at subframe 7 of radio frame 714, thus, avoiding dynamic switching of uplink component carrier transmissions within the same subframe.

Although this example is described showing a collision between the UE transmitting an uplink transmission on CC1 and transmitting SRS on CC2, a collision may similarly occur between the UE transmitting SRS on CC2, e.g., at 708 or 712 and receiving a downlink transmission. When this occurs, the UE may determine whether to adjust the transmission of the SRS or to adjust its reception of the downlink transmission in order to address the collision.