Research And FPGA Implementation Of Deterministic Jitter Strategy For Differentiated Interconnection Services

As an emerging field of information technology,the Industrial Internet is developing rapidly and playing an increasingly important role in the manufacturing industry.At present,the real-time services of the industrial Internet are becoming more and more abundant,and various differentiated services in the network have different requirements for delay and jitter.How to meet the deterministic jitter requirements of differentiated services and ensure orderly industrial production is a problem in the industrial Internet.The key issue.In view of the above problems,this paper summarizes the existing scheduling strategies,proposes a deterministic jitter strategy based on flow classification and multi-queue joint scheduling,designs and implements a switching node based on this strategy,builds a network verification platform,and verifies the feasibility of this strategy.The main research work and innovation points are as follows:(1)In the industrial Internet scenario,this paper proposes a deterministic jitter scheduling strategy based on flow classification and multi-queue joint scheduling to meet the needs of differentiated services in the network for deterministic jitter transmission.By labeling the data frames in the network with jitter requirements and delay control tags,the tags transmit the queuing delay information of the current data frames between each deterministic switching node and adjust the business without precise time synchronization of the entire network.The queuing delay of frames at each subsequent switching node is used to realize the end-to-end jitter of service frames.Through multi-queue joint scheduling,the data frame can reach the expected queuing delay at each node.The frame preemption mechanism is introduced to ensure that in the case of network congestion,the demand for services with severe delay and jitter can be satisfied first.(2)This paper designs and implements a deterministic switching node based on flow classification and multi-queue joint scheduling.With this switching node as the core,a functional verification platform is built in combination with the existing network devices in the laboratory.The availability of the strategy proposed in this paper is verified by simulating the differentiated business of the Industrial Internet through the business source.It is verified by the platform that when the network is lightly loaded,the strategy proposed in this paper can perform good scheduling for differentiated services in the network,and can meet the deterministic jitter requirements.As the network load gradually increases,deterministic jitter for services with strict jitter requirements will be guaranteed first.