Abstract: The present invention relates to a system for performing phase detection and synchronization in an AMI communication network using a relay communication, and a method thereof. According to an embodiment of the present invention, a system for performing phase detection and synchronization in an AMI communication network using a relay communication includes an AMI server for collecting a ‘reference zero-crossing detection (ZCD) time difference by phase’ of input/output terminals of a main transformer installed in a substation; and a data concentration unit (DCU) comparing the ‘reference ZCD time difference by phase’ transmitted from the AMI server with a ‘ZCD time difference by phase’ collected by itself, and matching the same to have a time difference close to an error range.

Abstract: The present invention relates to a system for performing phase detection and synchronization in an AMI communication network using a relay communication, and a method thereof. According to an embodiment of the present invention, a system for performing phase detection and synchronization in an AMI communication network using a relay communication includes an AMI server for collecting a ‘reference zero-crossing detection (ZCD) time difference by phase’ of input/output terminals of a main transformer installed in a substation; and a data concentration unit (DCU) comparing the ‘reference ZCD time difference by phase’ transmitted from the AMI server with a ‘ZCD time difference by phase’ collected by itself, and matching the same to have a time difference close to an error range.

Abstract: The present invention relates to a data concentration unit, a power meter, and a method of operating the same. To this end, according to the present invention, there is a provided a data concentration unit that collects power metering data from power meters including a High-level Data Link Control (HDLC)-based power meter and an Internet Protocol-based power meter, and transmits the collected power metering data to an AMI server, wherein the power metering data is collected according to a communication model pre-configured for high-speed power line communication, and the communication model includes a high-speed power line communication MAC layer, an Internet Protocol layer, and an adaptation layer configured between the high-speed power line communication MAC layer and the Internet Protocol layer, the adaptation layer supporting communication with the HDLC-based power meter and with the Internet Protocol-based power meter.

Abstract: The present invention relates to a system and method for unidirectional data transmission. Data is unidirectionally transmitted from a network having a higher security level to a network having a lower security level and a corresponding data verification result is received through a separate line. Hence, it is possible not only to physically block access to the network having a higher security level from the network having a lower security level but also to improve reliability of data delivery by appropriately handling packet loss and bit errors that may occur during data transmission.

Abstract: The present invention relates to a system and method for unidirectional data transmission. Data is unidirectionally transmitted from a network having a higher security level to a network having a lower security level and a corresponding data verification result is received through a separate line. Hence, it is possible not only to physically block access to the network having a higher security level from the network having a lower security level but also to improve reliability of data delivery by appropriately handling packet loss and bit errors that may occur during data transmission.

Abstract: The present invention relates to a security system using an automatic meter reading protocol. The security system includes a Device Language Message Specification (DLMS) transmission unit for transmitting security DLMS data that includes security key update information and a first authentication value, and a DLMS reception unit for receiving the security DLMS data, searching the security key update information in the security DLMS data, and generating an updated security key using a second authentication value according to the security key update information. The security system can solve various problems occurring due to the operation of a separate security protocol, and can be easily implemented and managed.

Abstract: The present invention relates to a security system using an automatic meter reading protocol. The security system includes a Device Language Message Specification (DLMS) transmission unit for transmitting security DLMS data that includes security key update information and a first authentication value, and a DLMS reception unit for receiving the security DLMS data, searching the security key update information in the security DLMS data, and generating an updated security key using a second authentication value according to the security key update information. The security system can solve various problems occurring due to the operation of a separate security protocol, and can be easily implemented and managed.