Methods and systems for techniques for configuration of asymmetric carrier aggregation are disclosed. In an implementation, a method of wireless communication includes receiving, by a first communication device, a first message to configure a plurality of cells according to a symmetric carrier aggregation or an asymmetric carrier aggregation, each cell including one or more carriers, or receiving, by the first communication device, the first message and the second message to configure the plurality of cells and activate one or more of the plurality of cells according to a symmetric carrier aggregation or an asymmetric carrier aggregation.