Patent ID: 7573865
Filing Date: 2009-08-11
Classification: H04B

Abstract:
1. A method of transmitting a periodic control signal in a dual-use wireless device, comprising: receiving an external timing signal at a first wireless circuit in the dual-use wireless device; synchronizing a first clock in the first wireless circuit with the external timing signal; sending a first internal timing signal from the first wireless circuit to a second wireless circuit in the dual-use wireless device, after synchronizing the first clock with the external timing signal; waiting for a delay time after the sending of the first internal timing signal from the first wireless circuit to the second wireless circuit; broadcasting the periodic control signal at the second wireless circuit based on the first internal timing signal after waiting for the delay time; synchronizing a second clock in the second wireless circuit with the first internal timing signal; and generating a second internal timing signal in the second wireless circuit, after synchronizing the second clock with the first internal timing signal, wherein the delay time is one of: randomly determined, or iteratively chosen from a predetermined set of possible delay times, and wherein the periodic control signal is broadcast in response to the second internal timing signal.