US 12,439,243 B2
Network system, communication control device, and communication control method
Akihiro Ohnuma, Tokyo (JP); Daisuke Mashimo, Tokyo (JP); Masayuki Takase, Tokyo (JP); Yuji Oishi, Tokyo (JP); and Mikio Kuwahara, Tokyo (JP)
Assigned to HITACHI, LTD., Tokyo (JP)
Filed by Hitachi, Ltd., Tokyo (JP)
Filed on Mar. 16, 2023, as Appl. No. 18/122,205.
Claims priority of application No. 2022-101778 (JP), filed on Jun. 24, 2022.
Prior Publication US 2023/0422025 A1, Dec. 28, 2023
Int. Cl. H04W 8/26 (2009.01); G16Y 20/20 (2020.01)
CPC H04W 8/26 (2013.01) [G16Y 20/20 (2020.01)] 8 Claims
OG exemplary drawing
 
1. A network system that transfers data, the network system comprising:
a first network;
a second network connected with the first network and to which a server is connected;
a third network connected with the first network and in which a terminal having address information different from address information of the first network is accommodated; and
at least one processor which when executing at least one program configures the at least one processor to:
determine connection availability of the terminal to the second network;
convert address information attached to data transferred between the first network and the third network;
convert the address information of a gateway device in the first network attached to the data transferred from the first network to the third network, into address information of the terminal in the third network, and convert the address information of the terminal in the third network attached to the data transferred from the third network to the first network, into the address information of the gateway device in the first network;
hold, in a terminal identification device, terminal identification information in which the address information of the gateway device in the first network, an identifier of the terminal, and the connection availability of the terminal to the second network are associated with each other;
determine the connection availability of the terminal to the second network based on the terminal identification information; and
acquire the address information of the gateway device in the first network and the identifier of the terminal from the gateway device to register or update the terminal identification information.