Abstract: Due to local information requirements and the lack of the cloud computing framework support,this paper proposed a fog computing framework based on “intelligent front-terminal” for mobile applications.The framework extends a fog layer between cloud services and mobile devices,aiming at the smooth,low-latency and economical services deliveryfrom cloud to mobile.In hospital scene,this paper designed and developed an information service system,which provides medical information,queuing waiting time and multimedia services.Moreover,the multi-band load balancing algorithm and queuing waiting time estimation based on local information algorithm were proposed in the system.The availability of the system and the efficiency of algorithms were verified in real-world experiments.

Key words: Cloud computing,Fog computing,Date caching,Wireless accessing,Internet of Things