Systems Engineering and Electronics ›› 2024, Vol. 46 ›› Issue (8): 2867-2876.doi: 10.12305/j.issn.1001-506X.2024.08.34

• Communications and Networks • Previous Articles    

Business-driven terminal mode switching method for low Earth orbit satellite-based Internet of Things

Tao HONG, Fan WANG, Zhi LI, Zhiwei ZHONG, Xiaojin DING, Ziwei LIU, Gengxin ZHANG   

  1. School of Communication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
  • Received:2023-05-05 Online:2024-07-25 Published:2024-08-07
  • Contact: Tao HONG

Abstract:

To address the dynamic variation issue in business latency and terminal power consumption requirement for narrow band Internet of Things (NB-IoT) regime in large-scale geographic and diverse scenario applications within the context of low-Earth-orbit satellite Internet of Things, a method that utilizes a Markov chain model to assess the latency and power consumption of NB-IoT terminals during extended discontinuous reception (eDRX) and power saving mode (PSM) is proposed. The approach establishes a multi-objective optimization problem with downlink business latency and terminal power consumption as optimization targets. Offline training of a regression prediction model based on support vector machine (SVM) is conducted using terminal historical business data information at the gateway. This regression model is then employed as the objective function for the non-dominated sorting genetic algorithm-Ⅱ (NSGA-Ⅱ) to obtain the Pareto frontier solution set for the multi-objective optimization problem. Subsequently, selecting values for the work state timer parameters from the Pareto frontier solution set that meets the current application's latency and power consumption requirements, online configuration of the terminal is performed. Simulation results demonstrate that compared to traditional ground-based IoT terminal fixed timer parameter configuration methods, the proposed business-driven timer parameter configuration method can better fulfill business latency and terminal power consumption requirements in dynamic multi-scenario applications for terminals.

Key words: low-Earth-orbit satellite Internet of Things, narrow band Internet-of-Things (NB-IoT), Markov chain, latency and power consumption, multi-objective optimization

CLC Number: 

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