Patent ID: 8310340
Filing Date: 2012-11-13
Classification: E05Y,G07C,H04B

Abstract:
1. A radio method for controlling doors in the 2.4 GHz frequency band with a large number of operating channels, wherein a stationary unit is bidirectionally networked by means of a wireless radio connection with at least one battery-powered mobile unit and uses a frequency-hopping method with more than one channel, comprising the steps of: executing channel hops in a time raster between 0.625 ms and 10 ms, adaptively selecting the channels (D providing at least one complete communication cycle comprising an incoming data transmission and a response takes place on one channel (D adapting the number of transmitted data to the useful data that must be transmitted, and synchronizing the establishment of a connection between the stationary unit and the mobile unit on an adaptively predetermined synchronization channel.