Computer Science Department
School of Computer Science, Carnegie Mellon University
Are Cloudlets Necessary?
Ying Gao, Wenlu Hu, Kiryong Ha, Brandon Amos,
We present experimental results from Wi-Fi and 4G LTE networks to validate the intuition that low end-to-end latency of cloud services improves application response time and reduces energy consumption on mobile devices. We focus specifically on computational offoading as a cloud service. Using a wide range of applications, and exploring both pre-partitioned and dynamically partitioned approaches, we demonstrate the importance of low latenc for cloud offload services. We show the best performance is achieved by offloading to cloudlets, which are small-scale edge-located data centers. Our results show that cloudlets can improve response times 51% and reduce energy consumption in a mobile device by up to 42% compared to cloud offload.