Handover Mechanism Based on Underwater Hybrid Software-Defined Modem in Advanced Diver Networks  

作　　者：K.M.Delphin Raj Sun-Ho Yum Jinyoung Lee Eunbi Ko Soo-Yong Shin Soo-Hyun Park 

机构地区：[1]Department of Financial Information Security,Kookmin University,Seoul,02707,Korea [2]Special Communication&Convergence Service Research Center,Kookmin University,Seoul,02707,Korea [3]Department of Computer Science,Kookmin University,Seoul,02707,Korea

出　　处：《Computers, Materials & Continua》2022年第3期5721-5743,共23页计算机、材料和连续体（英文）

基　　金：This research was a part of the project titled“Development of the wide-area underwater mobile communication systems”funded by the Ministry of Oceans and Fisheries,Korea.

摘　　要：For the past few decades,the internet of underwater things(IoUT)otained a lot of attention in mobile aquatic applications such as oceanography,diver network monitoring,unmanned underwater exploration,underwater surveillance,location tracking system,etc.Most of the IoUT applications rely on acoustic medium.The current IoUT applications face difficulty in delivering a reliable communication system due to the various technical limitations of IoUT environment such as low data rate,attenuation,limited bandwidth,limited battery,limited memory,connectivity problem,etc.One of the significant applications of IoUT include monitoring underwater diver networks.In order to perform a reliable and energy-efficient communication system in the underwater diver networks,a smart underwater hybrid softwaredefined modem(UHSDM)for the mobile ad-hoc network was developed that is used for selecting the best channel/medium among acoustic,visible light communication(VLC),and infrared(IR)based on the criteria established within the system.However,due to the mobility of underwater divers,the developed UHSDMmeets the challenges such as connectivity errors,frequent link failure,transmission delay caused by re-routing,etc.During emergency,the divers are most at the risk of survival.To deal with diver mobility,connectivity,energy efficiency,and reducing the latency in ADN,a handover mechanism based on pre-built UHSDM is proposed in this paper.This paper focuses on(1)design of UHSDM for ADN(2)propose the channel selection mechanism in UHSDM for selecting the best medium for handover and(3)propose handover protocol inADN.The implementation result shows that the proposed mechanism can be used to find the new route for divers in advance and the latency can be reduced significantly.Additionally,this paper shows the real field experiment of air tests and underwater tests with various distances.This research will contribute much to the profit of researchers in underwater diver networks and underwater networks,for improving the quality of services(QoS)

关 键 词：Internet of underwater things(IoUT) underwater hybrid software-defined modem(UHSDM) advanced diver networks(ADN) channel selection mechanism(CSM) handover mechanism acoustic visible light communication(VLC) infrared(IR) 

分 类 号：TP311.5[自动化与计算机技术—计算机软件与理论]