COMMUNICATION SYSTEM, COMMUNICATION DEVICE, AND COMMUNICATION METHOD

A communication system includes a server and multiple communication nodes. The server broadcasts a mesh network entry request to the communication nodes. Each communication node is configured to receive the mesh network entry request, cause a mesh network entry request to hop to the other communication nodes if the entry request is not addressed to the node itself, register a rank of the node based on a number of hops required for the entry request to reach the node if the entry request is addressed to the communication node, transmit a rank request when the communication node registers its rank, receive a rank response from other nodes, each rank response including a rank of the node sending the rank response, and register the node having a highest ranking response as a communication path to the server if its rank is higher than the node itself.