Non-master-slave virtual full duplex network

Abstract

The invention discloses a non-master-slave virtual full duplex network. The non-master-slave virtual full duplex network comprises a plastic optical fiber receiving-transmitting module and a single-core plastic fiber, wherein half-duplex bidirectional data communication is realized through the single-core plastic optical fiber; in the plastic optical fiber receiving-transmitting module, a plurality of terminals or sensor communication nodes are connected in series through a single plastic optical fiber, so that a virtual bidirectional network is built on the basis of a ring network or a tree network. The plastic optical fiber receiving-transmitting modules are arranged on nodes, a main control unit is arranged on a communication module of any node, and point-to-point connection is realizedfor each node through a single plastic optical fiber. The main control unit can issue a command to a certain or all nodes, and another certain node can actively report information to the main controlunit.

Description

technical field [0001] The invention relates to the technical field of information and communication, in particular to a non-master-slave virtual full-duplex network based on plastic optical fiber single-core coaxial half-duplex communication technology. Background technique [0002] At present, artificial intelligence, intelligent robots, unmanned aerial vehicles, intelligent wearables, intelligent unmanned vehicles, and even airplanes, ships, high-speed rails, and smart grids, which are being promoted in China, are developing rapidly. The short-distance communication network (or the last mile) plays an important and key technical role. [0003] Among the above application systems, there is one important feature in common: it is based on a suspended system that is both mobile as a whole and relatively independent from the outside world. That is to say, within the system, it is in a relatively fixed position, and each sensor transmits data to each other in real time and at ...

AI Technical Summary

Problems solved by technology

[0008] Disadvantages: ① Poor anti-noise ability, communication stability and real-time performance, vulnerable to strong electric environment and electromagnetic harmonic interference of the line itself, the suppression and solution technology is not perfect enough

[0009] ②The transmission rate is low, and the information needs to be transmitted repeatedly when the data transmission is not enough

[0010] ③Affected by the load change of the low-voltage power grid, the data transmission success rate varies greatly in different stations and at different time periods; affected by the hot and humid environment and the crosstalk of multiple stations, the copying rate will fluctuate

[0011] ④On-site maintenance can not see the effect immediately; the operation and maintenance work is repeated, and the cost increases

[0014] Disadvantages: ① Communication stability: When the transmission conditions such as load impedance changes, the transmission distance will reduce the bandwidth and communication distance to ensure reliability, so that the transmission distance will be shortened due to harmonic interference

[0015] ②There is a certain radiation disturbance during data transmission, and sometimes there will be crosstalk between multiple stations

[0018] Disadvantages: ① The overhead line method is susceptible to lightning strikes, surge induction, impact and interference from space electromagnetic waves, resulting in damage to 485 devices and local communication paralysis

[0019] ②If the 485 wire is buried underground, it will be easily affected by moisture, which will accelerate the corrosion and aging of the 485 metal wire; it will also be easily damaged by insects and rats

[0021] ④Installation and wiring workload is relatively large

[0024] Insufficient: ① The shielding of obstacles affects signal transmission. When the transmission distance is not enough, it is necessary to increase the relay or increase the transmission power, but the multi-level relay affects the communication efficiency and the real-time performance of the collected data.

[0025] ②Due to limited wireless frequency resources, the commonly used working frequency band is a public wireless public frequency band, which may cause co-frequency and intermodulation interference

[0026] ③Wireless signals are affected by object shielding and refraction (such as smog), reducing the copying distance

[0036] Insufficient: ①The workload of installation and wiring is similar to that of 485 bus

[0037] ②The communication distance of plastic optical fiber is currently less than 300 meters

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