Patent ID: 9380130
Filing Date: 2016-06-28
CPC Classification: H04L

Claim Text:
1. A relay communication system comprising: a first network; a second network; a first relay server connected to the first network; a second relay server connected to the second network, that communicates with the first relay server via a third network; a first client terminal connected to the first relay server via the first network; and a second client terminal connected to the second relay server via the second network; wherein each of the first relay server, the second relay server, the first client terminal connected to the first relay server, and the second client terminal connected to the second relay server includes: an information sharing controller that allows the first relay server, the second relay server, the first client terminal connected to the first relay server, and the second client terminal connected to the second relay server, to share the relay group information and the relay server information; a VLAN group information controller that allows VLAN client terminals defining a VLAN group in the relay group to share VLAN group information, at least two client terminals among the first client terminal connected to the first relay server and the second client terminal connected to the second relay server being the VLAN client terminals, and the VLAN group information including hub information including identification information of the first relay server and identification information of the second relay server to which the VLAN client terminal is connected, session information that indicates a connecting-side and a connected-side of a session established between the first relay server and the second relay server, and identification information that identifies the VLAN client terminal, each of the first relay server and the second relay server further includes: an activation command controller that transmits a response signal including address information of a VLAN device as a VLAN client terminal that is arranged to be activated in a case of receiving an activation instruction of the VLAN group; and each of the first client terminal connected to the first relay server and the second client terminal connected to the second relay server further includes a virtual address controller that creates virtual address information that includes virtual addresses given to the VLAN devices based on the response signal, and that transmits the virtual address information to the VLAN device; if the first client terminal connected to the first relay server or the second client terminal connected to the second relay server is a VLAN device, the respective first or second client terminal sets the given virtual address in a VLAN interface of the respective first or second client terminal, and communicates with other VLAN device using the virtual address information and the VLAN session.