Ultra Reliable Load-Aware Connection Management(LACM)Algorithm in WIA-FA Systems  

作　　者：Liu Gang Jiang Chunhao Ren Xiaochun Fan Pingzhi Liang Chengchao Ma Zheng 

机构地区：[1]Southwest Jiaotong University,Chengdu 611756,China [2]State Key Laboratory of Rail Transit Engineering Informatization(FSDI),Xi’an 710043,China [3]Chongqing University of Posts and Telecommunications,Chongqing 400065,China

出　　处：《China Communications》2024年第8期142-161,共20页中国通信（英文版）

基　　金：supported by NSFC project(grant No.61971359);Chongqing Municipal Key Laboratory of Institutions of Higher Education(grant No.cquptmct-202104);Fundamental Research Funds for the Central Universities,Sichuan Science and Technology Project(grant no.2021YFQ0053);State Key Laboratory of Rail Transit Engineering Informatization(FSDI).

摘　　要：The increasing demand for industrial automation and intelligence has put forward higher requirements for the reliability of industrial wireless communication technology.As an international standard based on 802.11,Wireless networks for Industrial Automation-Factory Automation(WIA-FA)greatly improves the reliability in factory automation scenarios by Time Division Multiple Access(TDMA).However,in ultra-dense WIA-FA networks with mobile users,the basic connection management mechanism is inefficient.Most of the handover and resource management algorithms are all based on frequency division multiplexing,not suitable for the TDMA in the WIA-FA network.Therefore,we propose Load-aware Connection Management(LACM)algorithm to adjust the linkage and balance the load of access devices to avoid blocking and improve the reliability of the system.And then we simulate the algorithm to find the optimal settings of the parameters.After comparing with other existing algorithms,the result of the simulation proves that LACM is more efficient in reliability and maintains high reliability of more than 99.8%even in the ultra-dense moving scenario with 1500 field devices.Besides,this algorithm ensures that only a few signaling exchanges are required to ensure load bal-ancing,which is no more than 5 times,and less than half of the best state-of-the-art algorithm.

关 键 词：connection management load-aware multi-connectivity reliability RETRANSMISSION WIAFA 

分 类 号：TN92[电子电信—通信与信息系统]