针对数据量剧增的配电物联网中存在的带宽利用率低和业务数据服务质量(quality of service,QoS)难以满足通信需求等问题,提出一种多优先级排队论的带宽分配方法.首先,对感知终端到边缘物联网关的业务数据传输过程进行改进,改进后的传输过程可根据不同业务数据对QoS的不同要求进行数据优先级的划分,对不同优先级数据设置不同的服务机制;然后,对业务数据传输中的马尔科夫过程进行分析,基于改进后的数据传输过程建立以带宽利用率为目标,丢包率和延时时间为约束的多优先级排队论带宽分配模型;并将所提出的带宽分配方法与传统方法进行对比.结果表明:QoS指标有所改善,而且带宽利用率比传统不分优先级带宽分配方法高 9.73%,比弹性系数法高 31.17%.最后,探究多优先级排队论带宽分配方法的动态性能,结果表明适当地提高带宽可以改善QoS指标,但要注意带宽增大时所带来的带宽利用率减小问题.合理的带宽分配可以避免资源的浪费.
Bandwidth Allocation Method for Power Distribution Internet of Things Based on Multi-priority Queuing Theory
Currently,due to the increasing data amount in the Internet of Things,it is challenging to meet the the require-ments for quality of business data services and achieve high bandwidth utilization rate.To address this problem,a multi-pri-ority queuing theory bandwidth allocation method is proposed.First,the business data transmission process from perception terminal to edge IoT was improved.The improved transmis-sion process enables prioritization of data transmission accord-ing to the different requirements of various data,and facilitates the implementation of different service mechanisms for differ-ent priority levels.Then,the Markov process was analyzed dur-ing business data transmission.Based on the improved data transmission process,a multi-priority bandwidth allocation model with the packet loss rate and the delay time taken as con-strains was developed to optimize bandwidth utilization.The multi-priority queuing theory bandwidth allocation method is compared with traditional methods,resulting in an improved QoS indicator and a 9.73%higher bandwidth utilization rate compared to traditional bandwidth allocation methods.Addi-tionally,it achieved a 31.17%higher utilization rate than the elastic coefficient method.Finally,the dynamic performance of the multi-priority queuing theory bandwidth allocation method was also explored.The results indicate that the proper improve-ment of the bandwidth can improve the QoS indicator;however,it should be noted that increasing the bandwidth may lead to a reduction in its utilization rate.Therefore,reasonable bandwidth allocation can avoid waste of resources effectively.
power distribution field internet of thingsmulti-priority queuing theorydata transmission processband-width distributionbandwidth utilization rate
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