Multi-node data packet transmission method based on power line carrier communication technology

Abstract

The invention relates to the field of data communication, in particular to a multi-node data packet transmission method based on a time division multiplexing technology. The method comprises the following steps: allowing a carrier network maintenance node to perform unicast network configuration on all the carrier nodes in sequence according to a network topology; after the network configuration is completed, enabling the carrier network maintenance node to broadcast a calibrated network clock; calculating an inherent time slot according to the network configuration, the network clock and a carrier destination node; carrying out data packet transmission by a main-transmitting carrier node in the inherent time slot; enabling the carrier destination node responds to packet transmission confirmation after processing the data packet transmission; and according to packet transmission acknowledgement, enabling the main-transmitting carrier node to perform subsequent operation of data packet transmission. By using the method in the invention, time occupation in a communication frequency band on a power line can be reduced, out-of-band interference caused by harmonic mixing to carrier communication of other frequency bands is reduced, and the transmission efficiency of effective data is improved.

Description

technical field [0001] The invention relates to the technical field of power line carrier communication, in particular to a multi-node data packet transmission method based on power line carrier communication technology. Background technique [0002] For power line carrier communication using power line as the transmission medium, due to the time-varying nature of power line impedance and carrier interference, stable data transmission requires a reliable data exchange method. Traditional power line carrier communication networks mostly use a network model of one master and multiple slaves, relying on The master node polls the slave node to realize the data exchange between the master node and the slave node. [0003] This traditional method of data exchange relying on polling, in the case that multiple slave nodes need to report data to the master node, although the master node can continue to extract data from all slave nodes in turn, solve the channel conflict problem, and...

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Problems solved by technology

[0003] This traditional method of data exchange relying on polling, in the case that multiple slave nodes need to report data to the master node, although the master node can continue to extract data from all slave nodes in turn, solve the channel conflict problem, and indirectly realize slave nodes. The function of the node reporting data to the master node, but the slave nodes cannot directly exchange data, and the transmission efficiency of effective data is low. In addition, due to the complex environment of the power line carrier, the harmonics attached to the continuous transmission of the carrier in the communication frequency band, It is easy to mix with the interference noise on the power line, which will cause out-of-band interference to other frequency band carrier communications working on the power line

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