基于半马尔科夫链的双模单待终端通信控制方法  

Communication control method of dual-mode single-standby terminal based on semi-Markov chain

作　　者：向敏[1] 周星旺 蒋炳林 胡坤志 张佳佳[1] Xiang Min;Zhou Xingwang;Jiang Binglin;Hu Kunzhi;Zhang Jiajia(Key Laboratory of Industrial Internet of Things and Networked Control,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Powerchina Chongqing Engineering Corporation Limited,Chongqing 400060,China)

机构地区：[1]重庆邮电大学工业物联网与网络化控制教育部重点实验室,重庆400065 [2]中国电建集团重庆工程有限公司,重庆400060

出　　处：《仪器仪表学报》2024年第7期301-312,共12页Chinese Journal of Scientific Instrument

基　　金：国家重点研发计划项目(2022YFF0604202);重庆市技术创新与应用发展专项重点项目(CSTB2022TIAD-KPX0137)资助。

摘　　要：针对窄带物联网(NB-IoT)和低功耗蓝牙(BLE)双模单待终端的低功耗、BLE连接时延和NB-IoT下行业务低响应时延的需求,提出一种基于半马尔科夫链的终端通信控制方法以提高终端综合性能。结合NB-IoT的扩展型非连续接收(eDRX)模式和省电模式(PSM),其中PSM下BLE独占射频,构建终端通信状态转换的半马尔科夫链模型,获取功耗节约率和NB-IoT下行平均时延的计算模型;基于BLE连接和NB-IoT下行业务响应的时延要求,结合NB-IoT实时业务流量,动态计算eDRX的关键参数,再通过优化BLE广播时长以获得终端最优综合性能。仿真与实测结果表明,所提方法在低功耗需求场景下的功耗节约率高于0.96,在低时延需求场景下的NB-IoT下行业务平均响应时延低于10 s,满足通信时延需求的同时降低了终端通信功耗。Aiming at the low power consumption,bluetooth low energy(BLE)connection delay,and narrow band internet of things(NB-IoT)downlink traffic response delay requirements for NB-IoT and BLE dual-mode single-standby terminals,a terminal communication control method based on semi-Markov chain is proposed to enhance the comprehensive performance of the terminal.By integrating the extended idle mode discontinuous reception(eDRX)and power saving mode(PSM)of NB-IoT,where radio frequency is exclusively dedicated to BLE in PSM,a semi-Markov chain model for terminal communication state transition is constructed.This model is used to derive the power saving rate and the calculation model for the average NB-IoT downlink delay.Based on the delay requirements of BLE connection and NB-IoT downlink traffic,and combined with NB-IoT real-time traffic data,the critical parameters of eDRX are dynamically calculated.Subsequently,the terminal optimal comprehensive performance is achieved through optimizing BLE broadcast duration.Experimental results show that the proposed method achieves a power saving ratio exceeding 0.96 in low-power demand scenarios.Furthermore,in low-delay demand scenarios,the average downlink traffic response delay is less than 10 seconds.This method satisfies the communication delay requirement and reduces the communication power consumption of the terminal.

关 键 词：双模单待 半马尔科夫链 功耗节约率 时延 综合性能 

分 类 号：TN929.5[电子电信—通信与信息系统] TH86[电子电信—信息与通信工程]