COMMUNICATION SYSTEM, MANAGEMENT SERVER, COMMUNICATION RELAY APPARATUS, AND RECORDING MEDIUM

摘要

A communication system includes a plurality of devices, a plurality of communication relay apparatuses, and a management server. If the management server that has received from a cloud server a request to access a specific device has no communication session with a specific communication relay apparatus that has control over the specific device, the management server transmits a tunnel connection request to a substitute apparatus (another communication relay apparatus different from the specific communication relay apparatus) via a communication session between the substitute apparatus and the management server. The substitute apparatus transfers the tunnel connection request to the specific communication relay apparatus and causes the specific communication relay apparatus to return from a power saving mode. The specific communication relay apparatus then establishes tunnel communication with the cloud server on the basis of the tunnel connection request to relay communication between the cloud server and the specific device.

主权项

1. A communication system comprising:
a plurality of devices that are provided inside a predetermined LAN; a plurality of communication relay apparatuses that are provided inside the predetermined LAN and relay communication between the plurality of devices and a cloud server provided outside the predetermined LAN; and a management server that are provided outside the predetermined LAN and receives from the cloud server an access request to access a specific device among the plurality of devices, wherein the plurality of communication relay apparatuses include: a specific communication relay apparatus that is capable of transitioning to a power saving mode and has control over the specific device, the power saving mode being a mode in which the communication relay apparatus has no communication session with the management server; and a substitute communication relay apparatus that receives, in place of the specific communication relay apparatus, a tunnel connection request to establish tunnel connection with the cloud server, via a communication session between the substitute communication relay apparatus and the management server, in a case where the management server has received the access request from the cloud server and there is no communication session between the specific communication relay apparatus and the management server, the management server transmits the tunnel connection request to the substitute communication relay apparatus via a communication session between the substitute communication relay apparatus and the management server, the substitute communication relay apparatus that has received the tunnel connection request from the management server transfers the tunnel connection request to the specific communication relay apparatus and causes the specific communication relay apparatus to return from the power saving mode, and the specific communication relay apparatus that has returned from the power saving mode establishes tunnel communication with the cloud server in response to the tunnel connection request received from the substitute communication relay apparatus, and relays communication between the cloud server and the specific device.