Single-twisted-pair TSN passive coupler and design method

Abstract

The invention provides a single-twisted-pair TSN passive coupler and a design method thereof. The design method comprises the following steps: step 1, realizing double-wire Ethernet communication; step 2, realizing double-wire Ethernet power supply; step 3, accessing a power supply relay; step 4, realizing three-port TSN exchange; step 5, carrying out compatibility with a common Ethernet interface; step 6, establishing a time scheduling mechanism based on gating; step 7, dividing data priorities; step 8, implementing multi-node hybrid networking; and step 9, realizing centralized network configuration. The coupler provided by the invention can realize distributed connection of TSN network nodes, the connection adopts a single twisted pair, and the communication bandwidth is 1000Mbps. According to the double-wire power supply coupler, passive connection of network nodes is achieved, the nodes can be connected to the network more simply and conveniently, and cables are reduced. The coupler is suitable for the field of network communication and real-time control, and has the characteristics of few cables and simplicity in use.

Description

technical field [0001] The invention belongs to the technical field of communication, relates to a distributed real-time control network, in particular to a single-twisted-pair TSN passive coupler and a design method. Background technique [0002] Compared with the traditional Ethernet, the field of distributed network communication and real-time control network has special requirements for network topology, bandwidth allocation and power supply. [0003] In terms of topology, in the traditional Ethernet, a node needs to use a switch or a hub to access the network. The network topology can be star, ring, tree, bus and mesh structures. However, in the field of distributed network communication and real-time control, the distance between network communication nodes is usually relatively long, and the traditional network topology relies on the interconnection of switches, which is inconvenient to use. In order to solve the above problems, in the field of control, a network top...

AI Technical Summary

Problems solved by technology

However, in the field of distributed network communication and real-time control, the distance between network communication nodes is usually relatively far, and the traditional network topology relies on the interconnection of switches, which is inconvenient to use.

In order to solve the above problems, in the field of control, a network topology using a daisy chain connection has emerged. Each network node generally has 2 ports connected end to end, but this technology still uses ordinary 4 pairs of differential wires. It is inconvenient to apply in some fields that have strict requirements on cable cost, cable weight and wiring space

[0004] In terms of bandwidth, in a traditional network system that uses switches for interconnection, each node can simultaneously achieve full bandwidth and high-speed communication, but these nodes use CSMA / CD, or carrier sense multiple access / collision detection mechanism, to avoid conflicts, which introduces network transmission Latency is indeterminate, not suitable for control fields

The networks of the hub and daisy chain topology share the bandwidth. Although some dedicated control networks can realize real-time control data transmission and reception on the shared bandwidth network through time slices, these networks are dedicated and cannot be compatible with ordinary Ethernet. network (such as an office network), that is to say, it is not possible to send and receive information data (IT) while sending and receiving control data (OT traffic).

[0005] In terms of power supply, after years of development, Ethernet has formed a POE power supply technology, which can transmit power on 4 pairs of twisted pairs, and supply power to the equipment at the end of the network cable without the need for a power cord. However, as mentioned earlier, in some 4 pairs of twisted pairs in the field still cannot meet the requirements

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