ESTABLISHING METHOD OF NETWORK TOPOLOGY ABLE TO RELAY TRANSMISSION AMONG SUB-NETWORK IN BACKBONE-NETWORK

摘要

A method for establishing a network topology for relay-transmission between sub-networks of a backbone network is provided to guarantee reliability of communication by transferring information via a path with the best communication performance when sub-networks communicate with each other. A super master device transmits a beacon messages to sub-master devices(S505). The sub-master devices transmit a response message to the super master device, respectively(S510). If any one of the sub-master devices does not have a MASTER_DEV_ID(S515), the super master device assigns the MASTER_DEV_ID to the sub-master device(S520). The super master device determines performance of communication of each sub-master device based on the received response message, and if communication performance of any one of the sub-master devices is lower than a pre-set reference(S525), the super master device removes MASTER_DEV_ID with respect to the corresponding sub-master device(S530). A primary node master device, which has been assigned the MASTER_DEV_ID from the super master device, transmits a beacon message to the super master device and the other sub-mater device in a backbone network(S535). When response messages are received from the super master device and the other sub-master device in the backbone network(S540), the primary node master device determines whether they have the MASTER_DEV_ID(S545) and assigns the MASTER_DEV_ID to the other sub-master device that does not have it(S550). The primary node master device determines whether the communication performance of the sub-master device(S555). If the communication performance of the sub-master device is not satisfied, the primary node master device removes the MASTER_DEV_ID of the sub-master device(S560). When the MASTER_DEV_ID is assigned to every sub-master device in the backbone network, it is determined that a network topology is completely established(S565).