Automatic meter reading system and communication link quality detecting method thereof

Abstract

The invention discloses an automatic meter reading system and a communication link quality detecting method thereof. By utilizing the system, a new network layer interface architecture between a power line carrier module and a terminal is provided and through the architecture, an IPV6 (Internet Protocol Version 6) network can be directly accessed. The detecting method comprises a master-slave mode and a slave-master mode. In the master-slave mode, test data packets are sent from a master module, while a slave module at the opposite end receives the test data packets, records the test result and sends the result data to a concentrator; and in the slave-master mode, test data packets are sent from the slave module, while the master module receives the test data packets, records the test result and sends the result to the concentrator. According to the invention, the concentrator drives the master module and the slave module to be in the related link test mode by the control primitive, therefore the on-line detection of the link quality of each node of the master module and the slave module under the control of ICMP (Internet Control Messages Protocol) is realized, and an effective guarantee is supplied for the on-line network quality of an AMI (Advanced Metering Infrastructure) system of a smart power grid.

Description

technical field [0001] The invention relates to an automatic meter reading system and a communication link quality detection method thereof. Background technique [0002] The current power line carrier communication mainly has a narrowband single carrier communication mechanism, which uses spread spectrum technology to improve the anti-interference and anti-interception capabilities of communication, such as PSK and S-FSK power line communication mechanisms. IEC61334 formulated the S-FSK power carrier communication technology standard. The standard stipulates: S-FSK counts BER at the physical layer by transmitting a byte preamble, a byte frame delimiter, and a 38-byte data block. The BER is calculated based on bit errors in a data block assuming that no frame synchronization errors occur. In addition, the enterprise standard "Q / GDW 376.2-2009 Concentrator Local Communication Module Interface Protocol" of the State Grid Corporation of China stipulates the communication prot...

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Problems solved by technology

This standard does not formulate the online quality test interface of network nodes, and there is no expansion in this regard, so the online quality test of narrowband power line communication links cannot be realized in the carrier communication system of the State Grid

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