Delegation mechanism in Internet of Things(IoT)allows users to share some of their permissions with others.Cloud-based delegation solutions require that only the user who has registered in the cloud can be delegated p...Delegation mechanism in Internet of Things(IoT)allows users to share some of their permissions with others.Cloud-based delegation solutions require that only the user who has registered in the cloud can be delegated permissions.It is not convenient when a permission is delegated to a large number of temporarily users.Therefore,some works like CapBAC delegate permissions locally in an offline way.However,this is difficult to revoke and modify the offline delegated permissions.In this work,we propose a traceable capability-based access control approach(TCAC)that can revoke and modify permissions by tracking the trajectories of permissions delegation.We define a time capability tree(TCT)that can automatically extract permissions trajectories,and we also design a new capability token to improve the permission verification,revocation and modification efficiency.The experiment results show that TCAC has less token verification and revocation/modification time than those of CapBAC and xDBAuth.TCAC can discover 73.3%unvisited users in the case of delegating and accessing randomly.This provides more information about the permissions delegation relationships,and opens up new possibilities to guarantee the global security in IoT delegation system.To the best of our knowledge,TCAC is the first work to capture the unvisited permissions.展开更多
因特殊工况要求,5G基站的空调设备多常年开启以维持基站内的正常工作温度,从而保障主通讯设备的正常运行。据统计,移动通信基站中空调设备能耗约占总能耗的46%,5G基站空调的高能耗问题亟待解决。本文基于NB-IoT(Narrow Band Internet of...因特殊工况要求,5G基站的空调设备多常年开启以维持基站内的正常工作温度,从而保障主通讯设备的正常运行。据统计,移动通信基站中空调设备能耗约占总能耗的46%,5G基站空调的高能耗问题亟待解决。本文基于NB-IoT(Narrow Band Internet of Things,窄带物联网)技术设计了远程控制系统,实现了对5G基站空调的实时监控和运维;再通过设计智能温控系统,利用室内温度与室内外温差双参数决策、PID控制来实现5G基站空调的智能调节。通过Simulink仿真与实验测试验证了控制系统的有效性。展开更多
基金This work supports in part by National Key R&D Program of China(No.2018YFB2100400)National Science Foundation of China(No.61872100)+1 种基金Industrial Internet Innovation and Development Project of China(2019)State Grid Corporation of China Co.,Ltd.technology project(No.5700-202019187A-0-0-00).
文摘Delegation mechanism in Internet of Things(IoT)allows users to share some of their permissions with others.Cloud-based delegation solutions require that only the user who has registered in the cloud can be delegated permissions.It is not convenient when a permission is delegated to a large number of temporarily users.Therefore,some works like CapBAC delegate permissions locally in an offline way.However,this is difficult to revoke and modify the offline delegated permissions.In this work,we propose a traceable capability-based access control approach(TCAC)that can revoke and modify permissions by tracking the trajectories of permissions delegation.We define a time capability tree(TCT)that can automatically extract permissions trajectories,and we also design a new capability token to improve the permission verification,revocation and modification efficiency.The experiment results show that TCAC has less token verification and revocation/modification time than those of CapBAC and xDBAuth.TCAC can discover 73.3%unvisited users in the case of delegating and accessing randomly.This provides more information about the permissions delegation relationships,and opens up new possibilities to guarantee the global security in IoT delegation system.To the best of our knowledge,TCAC is the first work to capture the unvisited permissions.
文摘因特殊工况要求,5G基站的空调设备多常年开启以维持基站内的正常工作温度,从而保障主通讯设备的正常运行。据统计,移动通信基站中空调设备能耗约占总能耗的46%,5G基站空调的高能耗问题亟待解决。本文基于NB-IoT(Narrow Band Internet of Things,窄带物联网)技术设计了远程控制系统,实现了对5G基站空调的实时监控和运维;再通过设计智能温控系统,利用室内温度与室内外温差双参数决策、PID控制来实现5G基站空调的智能调节。通过Simulink仿真与实验测试验证了控制系统的有效性。
