1. A method, comprising:at a user equipment (UE) operating in a carrier aggregation mode and connected to a first cell operating on a licensed band and a second cell operating on an unlicensed band, wherein the UE comprises an Industrial, Scientific, and Medical (ISM) chip and a cellular chip:
performing a carrier sensing operation on the unlicensed band;
determining, from the carrier sensing operation, a duration that the unlicensed band will be occupied;
refraining from transmitting data to the second cell on the unlicensed band for the duration that the unlicensed band will be occupied; and
setting a transmitter in communication with the second cell to a low power mode for the duration that the unlicensed band will be occupied, wherein the cellular chip sets the transmitter to the low power mode for the duration.