Power management techniques for a universal serial bus are described. For example, a mobile computing device may include an interface having a universal serial bus, a host processor to couple to the interface, and a radio module to couple to the interface. The radio module may have a radio processor and a detector, the detector operative to detect temporary block flow from radio signals communicated over wireless shared media, the radio processor to enable the universal serial bus when the detector detects the temporary block flow and disable the universal serial bus when the detector does not detect the temporary block flow for a guard interval. Other embodiments are described and claimed.