The invention concerns a method (600) and device (100) for collision avoidance using sleep frames (720). The method can include the step of—in a multi-mode device (100)—conducting (630) a communication in accordance with an 802.16 communications protocol in which the 802.16 communication protocol communication includes both listening frames (710) and sleep frames. The method can also include the step of conducting (640) in the multi-mode device another communication in accordance with a Bluetooth communications protocol that supports extended synchronous connection-oriented mode. The method can also include the step of arranging (640) transmissions of the Bluetooth communication to avoid collisions with transmissions of the 802.16 communication.