Patent ID: 9729305
Date: 2017-08-08
CPC Classifications: B64D,H04L,H04W

Claim:
1. A method of controlling an airplane system, comprising: receiving, by each of a plurality of duplex modules, a corresponding event command from a client; performing, by a first module among the plurality of duplex modules, a first event specified by the event command in response to the event command; performing, by a second module different from the first module among the plurality of duplex modules, a second event specified by the event command after the first event is completed; and transmitting, by the first and second modules, a first response signal indicating a result of the performance of the first event and a second response signal indicating a result of the performance of the second event to the client, wherein the client compares the first response signal and the second response signal, and determines whether the plurality of duplex modules is synchronized or has an error, wherein the method further comprises providing, by the first module, a synchronization request to a memory unit after the first event is performed so that the memory unit toggles or changes a value of a flag stored therein in response to the synchronization request provided by the first module, wherein the performing of the second event includes performing the second event in response to the toggle or the change of the value of the flag from the memory unit, wherein the performing further comprises providing, by the second module, another synchronization request discriminated from the synchronization request provided by the first module to the memory unit after the second event is performed, and wherein the memory unit toggles or changes the value of the flag stored in the memory unit again in response to the synchronization request provided by the second module.