Method for improving power line carrier communication data throughout
A power line carrier and data communication technology, applied in the distribution line transmission system and other directions, can solve the problem that carrier communication can only perform half-duplex one-response one-answer communication, etc., and achieve the effect of improving throughput and low cost
Active Publication Date: 2015-12-30
厦门中天微电子科技有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problem that the existing power system carrier communication can only carry out half-duplex one-response-one-response communication, and provide a method for improving the data throughput of power line carrier communication, so as to realize full-duplex pipeline carrier communication Data transmission, improving the information throughput of the existing power system carrier communication
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[0041] Figure 9 It is an uplink signal processing flow of a slave node in a specific implementation manner of the present invention. The data to be transmitted is first converted into a physical frame Td, and compared with the difference Tmax between the half-synchronization and the maximum processing time for conflict avoidance. If Td≦Tmax, the data will be directly encapsulated and stored in the queue for sending. If Td>Tmax, the data will be divided and ensured that Td≦Tmax, and then encapsulated for sending. The specific sending processing is to perform zero-crossing detection first, and wait for the next zero-crossing detection if it does not match the set half cycle of uplink data transmission. A frame in the data queue and checks if the send queue is empty. If the sending queue is empty, the process ends. If the bus is not idle or the sending queue is not empty after sending, return to the zero-crossing detection link.
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The invention discloses a method for improving power line carrier communication data throughout. The method involves main and slave nodes on a power line, power frequency voltage zero-cross detection modules on the nodes and a carrier communication module; the zero-cross detection modules perform zero-cross detection, and the positive half period and the negative half period of power frequency are detected and informed to the carrier communication module; the carrier communication module performs uplink data transmission on the positive half period according to set requirements and performs downlink data transmission on the negative half period, or the other way around. According to the method, due to the fact that a full-duplex and assembly line type carrier communication data transmission mode is achieved, existing power line carrier communication information throughout is improved.
Description
technical field [0001] The invention relates to the field of power line carrier communication, in particular to carrier communication between a power line master node and a slave node or between a master node, a routing node (relay node) and a slave node, for example, using power lines to transmit power meter reading information. Background technique [0002] The communication mode of the current power system generally adopts the half-duplex one-response-one-response communication mode. That is, when the master node sends a command for downlink data transmission, the entire power frequency cycle of the power line can only transmit downlink data, and when the slave node feeds back information for uplink data transmission, the entire power frequency cycle of the power line can only transmit uplink data. [0003] Since the data request adopts the response type, each data transmission needs to occupy the entire process of sending, relaying, and responding, which makes the inform...
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IPC IPC(8): H04B3/54
Inventor 吴丽文陈跃发
Owner 厦门中天微电子科技有限公司