Communication system, communication device, communication method, and computer program product

A communication device constituting a multihop network in collaboration with a plurality of first communication devices, the communication device being capable of communicating with a server device via a lower-level network and via a gateway being mobile, the server device being connected to a higher-level network, the communication device comprising:

• one or more hardware processors coupled to a memory, the one or more hardware processors being configured to:
• manage schedule information containing communicable-period information indicating a communicable period during which the gateway establishes a connection with the communication device via the lower-level network;
• and
• transmit first communication data addressed to the server device, the first communication data being transmitted to the server device via the lower-level network and the gateway in the communicable period indicated by the communicable-period information,
• wherein
• each of the plurality of first communication devices is configured to store the schedule information and transmit the first communication data to the server device via the communication device, the lower-level network, and the gateway in the communicable period indicated by the communicable-period information;
• the server device is configured to store the schedule information and transmit second communication data to the communication device via the gateway and the lower-level network in the communicable period indicated by the communicable-period information, the second communication data being addressed to one of the plurality of first communication devices;
• and
• the gateway is configured to store the schedule information and transfer the second communication data to the communication device via the lower-level network in the communicable period indicated by the communicable-period information.

A communication method implemented by a communication device constituting a multihop network in collaboration with a plurality of first communication devices, the communication device being capable of communicating with a server device via a lower-level network and via a gateway being mobile, the server device being connected to a higher-level network, the communication method comprising:

• managing schedule information containing communicable-period information indicating a communicable period during which the gateway establishes a connection with the communication device via the lower-level network;
• and
• transmitting first communication data addressed to the server device, the first communication data being transmitted to the server device via the lower-level network and the gateway in the communicable period indicated by the communicable-period information,
• wherein
• each of the plurality of first communication devices is configured to store the schedule information and transmit the first communication data to the server device via the communication device, the lower-level network, and the gateway in the communicable period indicated by the communicable-period information;
• the server device is configured to store the schedule information and transmit second communication data to the communication device via the gateway and the lower-level network in the communicable period indicated by the communicable-period information, the second communication data being addressed to one of the plurality of first communication devices;
• and
• the gateway is configured to store the schedule information and transfer the second communication data to the communication device via the lower-level network in the communicable period indicated by the communicable-period information.

A computer program product comprising a non-transitory computer-readable recording medium on which a computer program executable by a computer is recorded, the computer constituting a multihop network in collaboration with a plurality of first communication devices, the computer being capable of communicating with a server device via a lower-level network and via a gateway being mobile, the server device being connected to a higher-level network, the computer program instructing the computer to:

• manage schedule information containing communicable-period information indicating a communicable period during which the gateway establishes a connection with the computer via the lower-level network;
• and
• transmit first communication data addressed to the server device, the first communication data being transmitted to the server device via the lower-level network and the gateway in the communicable period indicated by the communicable-period information,
• wherein
• each of the plurality of first communication devices is configured to store the schedule information and transmit the first communication data to the server device via the computer, the lower-level network, and the gateway in the communicable period indicated by the communicable-period information;
• the server device is configured to store the schedule information and transmit second communication data to the computer via the gateway and the lower-level network in the communicable period indicated by the communicable-period information, the second communication data being addressed to one of the plurality of first communication devices;
• and
• the gateway is configured to store the schedule information and transfer the second communication data to the computer via the lower-level network in the communicable period indicated by the communicable-period information.