Patent ID: 8755269

Claim:
A method of operating a wireless coordinator device in a wireless local insulin infusion system comprising a body area network of wireless medical devices, the method comprising: detecting loss of wireless synchronization, for a current wireless data communication channel, between the wireless coordinator device and a wireless glucose sensor transmitter device of the wireless local insulin infusion system, wherein detecting loss of wireless synchronization comprises determining that the wireless coordinator device missed at least a threshold number of expected wireless pings in sequence from the wireless end node device, wherein wireless pings are sent from the wireless glucose sensor transmitter device using the current wireless data communication channel, wherein the wireless pings are sent from the wireless glucose sensor transmitter device according to a transmit schedule of which both the wireless glucose sensor transmitter device and the wireless coordinator device are aware, and wherein each wireless ping is a glucose data packet that conveys glucose data when glucose sensor data is available, or a dummy packet that conveys no data when glucose sensor data is unavailable; in response to detecting loss of wireless synchronization, obtaining a measure of quality for the current wireless data communication channel; when the obtained measure of quality fails to satisfy a threshold criteria, selecting a new wireless data communication channel for the wireless coordinator device; and thereafter, transmitting wireless beacons with the wireless coordinator device, using the new wireless data communication channel.