Method of adaptive bandwidth adjustment for industrial field communications

Abstract

The invention discloses an adaptive bandwidth adjustment method for industrial field communication, which belongs to the technical field of communications. The method comprises the steps of (1) performing early-stage preparation of cyclic communication; (2) estimating the current bandwidth and predicting a channel gain matrix corresponding to the pre-spread spectrum bandwidth by using a Gaussian process regression algorithm after entering cyclic communication; (3) obtaining and comparing the current receiving end rate v; (4) comparing the mean value of the channel gain matrixes H; (5) carryingout cyclic detection when any condition in the step (3) or the step (4) is not met; and (6) carrying out bandwidth adjustment after further judging the channel gain matrix corresponding to the pre-spread spectrum bandwidth when any condition in the step (3) or the step (4) is met. According to the invention, an accurate channel estimation result is obtained by combining a channel estimation algorithm based on an intelligent algorithm and is evaluated; meanwhile, in combination with the effective data transmission rate v of the current receiving end, the bandwidth is dynamically adjusted according to the effective transmission rate V of the specified communication system; and the communication resource cost is saved under the condition that the communication rate requirement is met.

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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