Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for delivering resources. The methods, systems, and apparatus include actions of based on measurements of amounts of a resource that are delivered from one or more supply outlets against amounts of value of electronic prepayments that have been authorized by corresponding users of mobile devices for the delivery of the resource at the one or more supply outlets, causing the one or more supply outlets to enable delivery of the resource in aggregate amounts that are not outside amounts of value of electronic prepayments that have been authorized by the corresponding users of mobile devices for the delivery of the resource.

The present invention provides a gas recharge management method based on a compound Internet of Things (IoT) and an IoT system, and relates to the field of an IoT. The gas recharge management method based on a compound Internet of Things (IoT) and an IoT system provided by the present invention can facilitate the user to recharge in time before the purchased gas is depleted, so as to effectively avoid the sudden stop of gas supply during use because the user does not recharge in time.

The present invention provides a gas recharge management method based on a compound Internet of Things (IoT) and an IoT system, and relates to the field of an IoT. The gas recharge management method based on a compound Internet of Things (IoT) and an IoT system provided by the present invention can facilitate the user to recharge in time before the purchased gas is depleted, so as to effectively avoid the sudden stop of gas supply during use because the user does not recharge in time.

A distributed ledger based utility system architecture may be configured to enable secure payments, data transmission, and meter configuration of smart sensors. The utility system architecture may be a tiered architecture including multiple nodes at different levels of the architecture where each level may contain a different portion of the distributed ledger. As information is added to the distributed ledger, each portion of the distributed ledger may be updated based on whether the information is relevant to that node. The information may include rate contract transactions, meter configuration data transactions, payment transactions, or the like.

A distributed ledger based utility system architecture may be configured to enable secure payments, data transmission, and meter configuration of smart sensors. The utility system architecture may be a tiered architecture including multiple nodes at different levels of the architecture where each level may contain a different portion of the distributed ledger. As information is added to the distributed ledger, each portion of the distributed ledger may be updated based on whether the information is relevant to that node. The information may include rate contract transactions, meter configuration data transactions, payment transactions, or the like.

The present invention discloses an intelligent gas meter system with a light wallet, comprising a CPU for processing and operating data in the intelligent gas meter and controlling data exchange, a flow metering and control module for controlling a gas supply of an individual pipe and metering the supplied gas amount, a blockchain light wallet module for performing data interaction with the CPU and an external committer, and a communication module for implementing the data transmission among the CPU, the flow metering and control module and the blockchain light wallet module, and the data transmission in the blockchain network. The present invention records gas transactions related to this gas meter by providing a blockchain light wallet module, and combines with a committer in a blockchain network, such that the final gas amount information and gas transaction information are stored in the blockchain network in a distributive and tamper-proofing manner.

The present invention provides a virtual code-based transaction system, method and program, wherein the method includes a virtual code reception step in which a virtual code verification means receives a virtual code, and the virtual code is generated by a virtual code generation function included in a virtual code generation means, searching, by the virtual code verification means, for a storage location of a User Identification (UID) in the virtual code, searching, by the virtual code verification means, for control command information stored by matching the searched UID, and performing a control command based on the extracted control command information, wherein the virtual code verification means stores a plurality of UIDs and changes control command information matched to each of the plurality of UIDs every preset period.

Provided is a prepayment-type watt-hour meter including: a code recognition that recognizes a code image in which information on prepayment of a charge-based amount of electric power that is to be consumed by a load is stored as coded, and that recognizes the information on the prepayment that is stored in the code image; and a control unit that measures an amount of electric power consumption by the load, and that calculates the electric bill for the measured amount of electric power, based on the information on the prepayment that is recognized by the code recognition unit.

Provided is a prepayment-type watt-hour meter including: a code recognition that recognizes a code image in which information on prepayment of a charge-based amount of electric power that is to be consumed by a load is stored as coded, and that recognizes the information on the prepayment that is stored in the code image; and a control unit that measures an amount of electric power consumption by the load, and that calculates the electric bill for the measured amount of electric power, based on the information on the prepayment that is recognized by the code recognition unit.

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for delivering resources. The methods, systems, and apparatus include actions of based on measurements of amounts of a resource that are delivered from one or more supply outlets against amounts of value of electronic prepayments that have been authorized by corresponding users of mobile devices for the delivery of the resource at the one or more supply outlets, causing the one or more supply outlets to enable delivery of the resource in aggregate amounts that are not outside amounts of value of electronic prepayments that have been authorized by the corresponding users of mobile devices for the delivery of the resource.