基于多优先级eSIM的电力物联网终端自适应网络接入机制

在电力物联网发展下,考虑终端业务的多样性、异构网络信道传输质量的差异性和覆盖重叠性等因素,需要为终端提供多模自适应的网络接入选择机制来保障终端始终接入到最适合的网络进行业务的传送和处理。文章提出基于多逻辑嵌入式SIM卡(Embedded SIM,eSIM)优先级的自适应接入算法,将网络信号强度、QoS、能量效率、网络负载等作为终端候选网络优先级的判定因素,设计基于终端业务偏好选择的可变权值网络选择和切换判决机制,采用改进的层次分析法进行权值的确定,并采用逼近于理想解的排序法(Technique for Order Preference by Similarity to an Ideal Solution,TOPSIS)进行加权,计算综合评价指标,选择最优的网络。数值仿真表明,本研究采取的策略可以降低异构网络环境下终端接入阻塞率且在网络负载均衡程度上表现更好。

Adaptive Network Access Mechanism for Power IoT Terminal Based on Multi-priority eSIM

Considering the diversity of terminal services,difference in transmission quality of network channels and overlap of wireless network signals,a multi-mode adaptive network access mechanism is needed for terminals in the power IoT scenario to ensure that the terminal is always connected to the most suitable network for service transmission and processing.In this paper,a multi-logic eSIM priority based adaptive access algorithm is introduced.The network signal strength,QoS,energy efficiency and network load are considered as the judging factors of the network priority.Then a terminal preference-based network selection and handover mechanism is designed with the variable weight value.The modified AHP algorithm is adopted for weight value determination and the TOPSIS method is chose to calculate the comprehensive evaluation index and select the optimal network.The numeric results illustrate that the strategy adopted in this paper can decrease the network access blocking rate and has better performance in network load balancing degree under the heterogeneous network environment.