Patent ID: 9674288
Date: 2017-06-06
CPC Classifications: H04L,Y02P

Claim:
1. A controller configured to circulate a token among a plurality of nodes and allow data on each node to be shared, the plurality of nodes being a plurality of controllers connected to a network, the controller comprising: a data storage unit for sharing data among the plurality of nodes connected to the network; a network information storage unit for storing at least one set of network information containing a network identification number for identifying at least one network group including own node and at least one other node specified in advance, of the nodes connected to the network, and a connected node list of the network group to which the own node belongs; a token holding unit for holding a token of the network group to which the own node belongs; a transmitting unit for performing transmission to the all the other nodes connected to the network; and a receiving unit for performing reception from the other node connected to the network, wherein the transmitting unit includes: the receiving unit includes: