Data transmission method, data transmission control apparatus and data transmission device in power line communication (PLC) system

Abstract

The present invention relates to a data transmission method, a data transmission control apparatus and a data transmission device in a power line communication (PLC) system, belonging to the technical field of broadband PLC. According to the data transmission method in the PLC system, a central control node allocates and plans in a unified manner transmission resources in the system including a carrier sense multiple access (CSMA) timeslot and a time division multiple access (TDMA) timeslot; and then an allocation result is sent to each level of node in the system, each level of node occupies only a transmission resource sub-timeslot allocated to the level to send data, and each level of node can receive data of all transmission resource sub-timeslots. In the data transmission method in the PLC system, the transmission resources are allocated reasonably according to a service demand, so that the use efficiency of the transmission resources is improved, interference between the transmission resources is reduced, and the data transmission capability of the whole PLC system is improved.

Description

technical field [0001] The invention belongs to the technical field of the mobile internet of things, specifically belongs to the broadband power carrier communication technology, and in particular relates to a method for using transmission resources in the broadband power carrier system. Background technique [0002] Broadband carrier communication (abbreviation: PLC) network uses low-voltage power lines as the communication medium to realize the convergence, transmission and interaction of low-voltage power users' electricity consumption information. According to the structural characteristics of power lines, the network topology tree structure of broadband carrier communication, such as figure 1 shown. The network topology is a multi-layer network with a central control node (abbreviation: CCO) as the center and proxy nodes (abbreviation: PCO) connecting all end nodes (abbreviation: STA). Nodes B1, B2, and B3 belong to the first-level equipment; nodes C1, C2, C3, and C4...

AI Technical Summary

Problems solved by technology

If multiple nodes need to send data, it may cause interference. Therefore, the CSMA transmission resource usage method proposed by the existing PLC Chinese specification is inefficient and interferes seriously with each other, which greatly affects the data transmission capability of the PLC system.

[0005] For TDMA transmission resources, since all nodes share the TDMA transmission resource area, if two nodes need to transmit message data at the same time, and the TDMA time slot does not provide a collision detection mechanism, there will be serious mutual interference, which directly leads to data message transmission. Failed, so there are great restrictions in the process of conducting business, and the utilization efficiency of transmission resources is very low

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