Patent ID: 11910492
Assignee: NEC CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. A communication apparatus constituting a network of a first data center that provides a cloud service to a user, the communication apparatus comprising:
a first unit including at least a first processor controlling to connect to a first virtual network that is included in the first data center and provides a communication service in cooperation with at least a part of a communication facility of a first communication operator rented by a mobile virtual communication operator from the first communication operator, the first unit communicating with a second data center including a second virtual network providing a communication service in cooperation with at least a part of a communication facility of a second communication operator rented by the mobile virtual communication operator from the second communication operator, the first and second data centers provided by the mobile virtual communication operator; and
a second unit including at least a second processor to control a transmission destination of communication data transmitted by the first unit, the second processor of the second unit controlling the first unit to transmit, to the second data center, communication data that is to be transmitted from a first terminal of a first user contracting with the mobile virtual communication operator and connecting via the communication facility of the first communication operator rented by the mobile virtual communication operator from the first communication operator to the first virtual network, to a second terminal connecting via the communication facility of the second communication operator rented by the mobile virtual communication operator from the second communication operator to the second virtual network,
wherein in the first data center, the first processor, in response to a connection request from the first terminal to connect to the second virtual network in the second data center, receives an inquiry issued from the second virtual network,
the first processor checks whether the first terminal is registered in a storage unit of the first unit, and
if the first terminal is registered in the storage unit, the first processor allows the first terminal to connect to the second virtual network and start communication by roaming of the first terminal.