A Method for Adaptive Bandwidth Adjustment for Industrial Site Communication

Abstract

The invention discloses a method for adaptive bandwidth adjustment for industrial site communication, which belongs to the field of communication technology and comprises the following steps: ①preliminary preparation for entering cyclic communication, ②after entering cyclic communication, use Gaussian process regression algorithm to estimate the current bandwidth and Predict the channel gain matrix corresponding to the two pre-spreading bandwidths, ③ obtain the current receiving end rate v and compare, ④ compare the mean value of the channel gain matrix H, ⑤ perform loop detection when any of the conditions in step 3 or 4 are not satisfied, ⑥ satisfy In any case in step 3 or 4, bandwidth adjustment is performed after further judging the channel gain matrix corresponding to the pre-spreading bandwidth. The present invention combines the channel estimation algorithm based on the intelligent algorithm to obtain more accurate channel estimation results and evaluates them, and at the same time combines the effective data transmission rate v of the current receiving end to dynamically adjust the bandwidth size according to the effective transmission rate V of the specified communication system. Communication resource costs are saved where required.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for adaptive bandwidth adjustment of industrial field communication. Background technique [0002] Megatrends such as the Industrial Internet of Things (IIoT) and Industry 4.0 are driving new standards for wired connectivity in industrial automation and smart factories. With the expansion of communication scenarios in industrial sites, for example, the Intelligent Connected Industrial Internet of Things has a large rate requirement for the transmission of audio and video information. The traditional 485 or CAN communication system no longer meets the demand, and the two-wire OFDM communication system is used as A multi-carrier transmission scheme that efficiently utilizes communication frequency bands can well resist frequency selective fading and narrow bandwidth interference, and can increase transmission rates, so it has strong applicability in industrial commun...

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Problems solved by technology

[0003] Due to the complexity of the industrial site environment, there are various interference noises, and these interference components are concentrated in specific frequency bands. When these interferences are coupled to the communication bus, they will have a greater impact on the industrial communication system, such as increasing the communication delay. or reduce the transfer rate

[0004] In an industrial communication system, if it is necessary to ensure that the throughput of each communication device in the network is stable, it is necessary to ensure that the total bus rate is not lower than a certain rate. The traditional method needs to leave a large amount of bandwidth margin to deal with sudden changes in the channel environment; In this case, fixedly using a bandwidth that is much larger than the communication demand will result in waste of resource costs such as computing and power consumption.

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