A method for communicating feedback for communications received over multiple component carriers, CCs, in wireless communications, comprising: receiving the communications from a serving node over the multiple CCs configured in carrier aggregation or multiple connectivity; determining two or more of the multiple CCs for transmitting feedback regarding the communications received over at least two CCs of the multiple CCs, wherein the two or more of the multiple CCs are selected for transmitting the feedback based at least in part on a transmission time interval, TTI, duration for the at least two CCs;; and transmitting, over the two or more of the multiple CCs, feedback related to receiving the communications from the serving node over the at least two CCs, wherein determining the two or more of the multiple CCs for transmitting feedback is based at least in part on determining a first of the two or more of the multiple CCs as assigned for transmitting feedback for a first group in multiple control channel groups, wherein the first CC having a first TTI duration is assigned to the first group, and on determining a second of the two or more of the multiple CCs as assigned for transmitting second feedback for a second group in the multiple control channel groups, wherein the second CC having a second TTI duration is assigned to the second group, wherein one or more additional CCs of the multiple CCs are assigned to the first group based on having the first TTI duration, and wherein another portion of the multiple CCs are assigned to the second group in the multiple control channel groups based on having a TTI duration similar to the second TTI duration, wherein at least one of the CCs assigned to the second group has a TTI duration different than the second TTI duration. receiving the communications from a serving node over the multiple CCs configured in carrier aggregation or multiple connectivity; determining two or more of the multiple CCs for transmitting feedback regarding the communications received over at least two CCs of the multiple CCs, wherein the two or more of the multiple CCs are selected for transmitting the feedback based at least in part on a transmission time interval, TTI, duration for the at least two CCs;; and transmitting, over the two or more of the multiple CCs, feedback related to receiving the communications from the serving node over the at least two CCs, wherein determining the two or more of the multiple CCs for transmitting feedback is based at least in part on determining a first of the two or more of the multiple CCs as assigned for transmitting feedback for a first group in multiple control channel groups, wherein the first CC having a first TTI duration is assigned to the first group, and on determining a second of the two or more of the multiple CCs as assigned for transmitting second feedback for a second group in the multiple control channel groups, wherein the second CC having a second TTI duration is assigned to the second group, wherein one or more additional CCs of the multiple CCs are assigned to the first group based on having the first TTI duration, and wherein another portion of the multiple CCs are assigned to the second group in the multiple control channel groups based on having a TTI duration similar to the second TTI duration, wherein at least one of the CCs assigned to the second group has a TTI duration different than the second TTI duration.