Patent ID: 9319484
Filing Date: 2016-04-19
CPC Classification: H04L

Claim Text:
1. A relay communication system comprising: a first network; a second network; a first hardware relay server connected to the first network; a second hardware relay server connected to the second network, and configured to communicate with the first relay server via a third network; one or more client terminals connected to the first relay server via the first network; one or more client terminals connected to the second relay server via the second network; wherein each of the first relay server, the second relay server, the one or more client terminals connected to the first relay server, and the one or more client terminals connected to the second relay server includes: each of the one or more client terminals connected to the first relay server and the one or more client terminals connected to the second relay server further includes a virtual address control unit programmed and configured to, if the client terminal is the join-in-progress VLAN client terminal and receives the join-in-progress signal, update the virtual address information by adding virtual address of a client terminal created based on the virtual address information including virtual address assigned to the VLAN device constituting the VLAN group in an active state, and transmit the updated virtual address information to the VLAN device, the VLAN session control unit is programmed and configured to establish a VLAN session that is related to the join-in-progress VLAN client terminal and has not been established yet, and the join-in-progress VLAN client terminal and the VLAN device are configured to communicate with each other, using the updated virtual address information and the established VLAN session including the hub session and the device session.