| 主权项 |
1. A method of determining a desynchronization between a first implantable medical device (IMD) and a second IMD, the method comprising:
receiving, by a receiver of the second IMD, a synchronization query (SYNC) from the first IMD, the SYNC being transmitted in response to the first IMD detecting a predetermined transition of a first clock of the first IMD, the first clock having a first pulse rate; activating, only upon reception of the SYNC, a second clock of the second IMD, the activating of the second clock being triggered by a control circuit of the second IMD after detection of the SYNC by the receiver of the second IMD; determining, by a counting circuit of the second IMD, a number of pulses of the second clock occurring between reception of the SYNC and a predetermined transition of a third clock of the second IMD, the third clock having the first pulse rate, and the second clock having a second pulse rate higher than the first pulse rate, thereby generating a determined number of pulses of the second clock based on the synchronization query and the transition of the third clock; activating, after the transmission of the SYNC from the first IMD to the second IMD, a fourth clock of the first IMD; sending, to the first IMD, the determined number of pulses of the second clock and turning off the second clock; receiving, by a receiver of the first IMD which is initiated only during a reception window triggered by a clock signal of the fourth clock, the determined number of pulses of the second clock; and determining, upon reception of the determined number of pulse of the second clock, the desynchronization between the first IMD and the second IMD based on the determined number of pulses of the second clock, then deactivating the fourth clock. |
