Abstract: A communication device is connected to first and second networks. The communication device includes a processor executing a process including relaying communication between the first and second networks; and confirming connection to a first device connected to the first network or a second device connected to the second network, based on a device list registered in advance. The confirming includes blocking the relaying when the confirmation of the connection to the first device is unsuccessful; enabling the relaying when the confirmation of the connection to the first device is successful and when the second device is not registered in the device list; enabling the relaying when the confirmation of the connections to the first and second devices is successful; and blocking the relaying when the confirmation of the connection to the first device is successful and when the confirmation of the connection to the second device is unsuccessful.

Abstract: An intermediary server for intermediating ownership of energy between a supplier and a user, includes circuitry that transmits a first request to another intermediary server capable of requesting a change of ownership of energy to a decentralized ledge system that manages energy information on energy, the first request requesting to change ownership of energy produced by a same production method as a particular production method, from another intermediary agent managing the other intermediary server to an intermediary agent managing the intermediary server.

Abstract: An intermediary server for intermediating transfer of ownership of energy between a supplier and a user, includes circuitry that receives usage information indicating that energy has been used from a communication terminal of the user, and transmits, to a decentralized ledger system, a request for changing ownership of the energy from the previous owner to the user based on the usage information.

Abstract: A system includes circuitry to: in response to supply information indicating a supply of energy by a supplier, generate first information for tracking energy that instructs generation of second information, the second information indicating an owner of the energy and a production method used for producing the energy; in response to usage information indicating a usage of the energy by a user, determine whether ownership of the energy in the second information has not been changed from a previous owner to the user; and based on a determination that the ownership of the energy in the second information has not been changed, generate other first information for tracking energy that instructs a change of ownership of the energy in the second information from the previous owner to the user.

Abstract: An apparatus includes circuitry to: in response to a request for processing first information indicating an ownership of energy, determine whether a requester of the request has authority to process the first information and based on a determination indicating that the requester has authority to process the first information, generate second information for tracking enemy that instructs processing of the first information.

Abstract: A communication system includes a communication control apparatus, and one or more communication processing apparatuses, which reside on a network.

Abstract: A communication terminal includes circuitry to receive one or more user inputs specifying conditions related to future energy consumption. The circuitry further displays, on a display, a first energy consumption recommendation that is determined based on the specified conditions and a record of past energy consumption and receives a user operation to confirm or change the first energy consumption recommendation. When the user operation is a change of the first energy consumption recommendation, the circuitry further displays a second energy consumption recommendation according to the change and receives another user operation to confirm the second energy consumption recommendation. The circuitry outputs confirmation of the first energy consumption recommendation or the second energy consumption recommendation as details of the future energy consumption.

Abstract: A system for tracking exchange of energy, includes circuitry to, in response to information on supply of energy by a supplier, generate first information that instructs generation of second information, the second information indicating an owner of the energy and a production method used for producing the energy, and in response to information on usage of the energy by a user, generate other first information that instructs a change of ownership of the energy in the second information from a previous owner to the user.

Abstract: An intermediary server for intermediating ownership of energy between a supplier and a user, includes circuitry to: receive, from other intermediary server, a first request for changing ownership of energy having been produced by a particular production method, from an intermediary agent of the intermediary server to other intermediary agent of the other intermediary server; in response to reception of the first request, transmit, to a decentralized ledger system that manages energy information on energy, a second request for changing ownership of energy from the intermediary agent to the other intermediary agent; and in response to reception of a notification indicating that the ownership of energy is changed to the other intermediary agent from the decentralized ledger system, transmit to the other intermediary server a response indicating that the ownership of energy is changed to the other intermediary agent.

Abstract: A communication device is connected to first and second networks. The communication device includes a processor executing a process including relaying communication between the first and second networks; and confirming connection to a first device connected to the first network or a second device connected to the second network, based on a device list registered in advance. The confirming includes blocking the relaying when the confirmation of the connection to the first device is unsuccessful; enabling the relaying when the confirmation of the connection to the first device is successful and when the second device is not registered in the device list; enabling the relaying when the confirmation of the connections to the first and second devices is successful; and blocking the relaying when the confirmation of the connection to the first device is successful and when the confirmation of the connection to the second device is unsuccessful.

Abstract: A communication device includes a first communication unit configured to perform communication using a first scheme; a second communication unit configured to perform communication using a second scheme; a first acquirer configured to acquire, through communication using the second scheme, first information that indicates an area that allows communication using the first scheme in a first area for communication using the first scheme; a second acquirer configured to acquire second information that indicates an area that allows communication using the first scheme in an acoustic communication area; a comparator configured to compare the first information with the second information to determine whether a current position is within the area indicated by the first information; and a setupper configured to, when the current position is within the area, perform a process for establishing a communication line in accordance with the first scheme using setup information.

Abstract: A communication system includes a communication control apparatus, and one or more communication processing apparatuses, which reside on a network.

Abstract: A communication device includes: a first communication unit that performs communication with another communication device using a first communication scheme that enables communication in a first range. The first communication unit performs, when having determined that the other communication device received transmitted certain information, communication with the other communication device in a second range that is different from the first range and in which the other communication device is capable of receiving the certain information. The communication device relays communication from the other communication device to another device disposed outside the second range.

Abstract: A communication device is connected to first and second networks. The communication device includes a processor executing a process including relaying communication between the first and second networks; and confirming connection to a first device connected to the first network or a second device connected to the second network, based on a device list registered in advance. The confirming includes blocking the relaying when the confirmation of the connection to the first device is unsuccessful; enabling the relaying when the confirmation of the connection to the first device is successful and when the second device is not registered in the device list; enabling the relaying when the confirmation of the connections to the first and second devices is successful; and blocking the relaying when the confirmation of the connection to the first device is successful and when the confirmation of the connection to the second device is unsuccessful.

Abstract: A communication device includes a first communication unit configured to execute radio communication by using a first communication method, the first communication method allowing the radio communication to be executed within a first communication range; a second communication unit configured to execute radio communication by using a second communication method, the second communication method allowing the radio communication to be executed within a second communication range; and a permission processing unit configured to generate communication permission information to permit executing the radio communication by the first communication method, wherein the second communication unit is configured to receive setting information for establishing the radio communication by the first communication method, and wherein the first communication unit is configured to execute the radio communication by using the first communication method with another communication device that receives the setting information and the c

Abstract: A communication device includes: a first communication unit that performs communication with another communication device using a first communication scheme that enables communication in a first range. The first communication unit performs, when having determined that the other communication device received transmitted certain information, communication with the other communication device in a second range that is different from the first range and in which the other communication device is capable of receiving the certain information. The communication device relays communication from the other communication device to another device disposed outside the second range.

Abstract: A communication device includes: a first communication unit that performs wireless communication through a first communication scheme; a second communication unit that performs wireless communication through a second communication scheme in a second communication range; and a connecting module configured to establish a communication connection that forms an external network. The second communication unit transmits setup information for establishing a communication line through the first communication scheme. The first communication unit performs wireless communication through the first communication scheme with another communication device that has received the setup information. The connecting module forms an exclusive external network to establish a communication connection with an external device disposed in a communication system that exists at a physically different place.

Abstract: A communication device includes a first communication unit configured to perform communication using a first scheme; a second communication unit configured to perform communication using a second scheme; a first acquirer configured to acquire, through communication using the second scheme, first information that indicates an area that allows communication using the first scheme in a first area for communication using the first scheme; a second acquirer configured to acquire second information that indicates an area that allows communication using the first scheme in an acoustic communication area; a comparator configured to compare the first information with the second information to determine whether a current position is within the area indicated by the first information; and a setupper configured to, when the current position is within the area, perform a process for establishing a communication line in accordance with the first scheme using setup information.

Abstract: A communication device includes a first communication unit to execute radio communication by a first communication scheme allowing execution of the radio communication within a first communication range; a second communication unit to execute radio communication by using a second communication scheme allowing execution of the radio communication within a second communication range; a setting information retrieval unit to obtain, upon detecting that the communication device is within a predetermined area, setting information for establishing the radio communication by the first communication scheme; and a disconnection processing unit to disconnect radio communication with another communication device, wherein the first communication unit executes radio communication with the other communication device that obtains the setting information, and wherein, upon detecting that the communication device is not located within the second communication range, the disconnection processing unit disconnects the radio commu

Abstract: A communication device includes a first communication unit configured to execute radio communication by using a first communication method, the first communication method allowing the radio communication to be executed within a first communication range; a second communication unit configured to execute radio communication by using a second communication method, the second communication method allowing the radio communication to be executed within a second communication range; and a permission processing unit configured to generate communication permission information to permit executing the radio communication by the first communication method, wherein the second communication unit is configured to receive setting information for establishing the radio communication by the first communication method, and wherein the first communication unit is configured to execute the radio communication by using the first communication method with another communication device that receives the setting information and the c