An adaptable replication scheme in mobile online system for mobile-edge cloud computing

5G operators will utilize mobile edge computing (MEC) to shorten transmitting latency and fulfill the requirements of increasing mobile applications for high bandwidth and ultra-low latency. A mobile online system (MOS) supports mobile online applications to trigger events in the mobile devices, refresh data, and maintain data consistency in the clouds. As users run mobile online applications, a MOS may generate massive updates for replicas in the clouds and bring more network traffic for data consistency. This also causes additional traffic overhead in the Radio Access Network (RAN) and degrades Quality of Service (QoS). This paper presents an adaptive replication scheme for MEC. Our scheme dynamically allocates the number of replicas based on the read/write frequency in each MEC. The simulation results show that our scheme can efficiently reduce the average response time and improve QoS.