Patent ID: 9699750
Date: 2017-07-04
CPC Classifications: H04W

Claim:
1. A synchronization establishment method of performing synchronization establishment between a master station and a slave station, among a plurality of slave stations, via a network, the method comprising: dividing a message cycle into a plurality of time slots; allocating less than all of the plurality of time slots for use in a fast synchronization establishment mode by the plurality of slave stations; establishing wired connections between the master station and the plurality of slave stations, respectively; the master station receiving from the slave station, over one of the wired connections, a fast synchronization establishment mode request, and if a limited number of slave station(s) allowed to enter the fast synchronization establishment mode is not exceeded, transmitting to the slave station over the wired connection a fast synchronization establishment mode permission; and performing synchronization establishment by transmitting and receiving synchronization messages between the master station and the slave station over the wired connection using the allocated time slots in the fast synchronization establishment mode, wherein the master station does not transmit to the slave station the fast synchronization establishment mode permission if the limited number of slave station(s) allowed to enter the fast synchronization mode is exceeded.