Design and implementation of cloud offloading framework among devices for web applications

摘要

Nowadays, cloud computing has become a common computing infrastructure. As the computing paradigm has been shifted to cloud computing, devices can utilize computing resource any-where/any-time/any-device. Many research papers in mobile cloud called `cloud offloading' which migrates a device's workload to a server or to the other device have been proposed. However, previous cloud offloading methods are mainly focusing on the cloud offloading between a device and a server. Furthermore, these proposed methods are difficult to be commercialized because the proposed methods were very complex - difficulty of partitioning application tasks and maintaining execution status sync between a device and a server in the cloud. In this paper, I proposed the framework for cloud offloading based on the web application standard - HTML5 specification - for web applications among devices. In HTML5 specification, there is the method for the parallel execution of the task named `Web Worker' and the method for the communication among browsers name `WebRTC'. Utilizing the property of this specification, I proposed a seamless method to do the cloud offloading for parallelized tasks of the web applications among devices. Based on proposed method, a device can seamlessly migrate a part of web application workload with the Web Worker to other devices with a little modification of web applications. As a result, I can successfully build the environment where a device which has a HTML5 browser such as a mobile phone and a smart TV can share the workload among them in various situations - out-of-battery, good network connection.