Reliable Web Services Consumption through Mobile Cloud Computing

Abstract

The Mobile intermittent wireless connectivity limits the evolution of the mobile landscape, such that the mobile usage progress is coupled with the ubiquitous nature of the Internet and the web services. Achieving web service reliability results in low communication overhead, and correct retrieval of the appropriate state response. The most recent approaches that achieve the reliability of web services consumption are the Middleware approach and Mobile Agent (MA) approach. In this thesis, we discuss and analyze the two approaches these approaches that achieve the reliability of web services consumed by mobile devices, and propose an enhanced architecture that achieves the reliability under various conditions with minimum communication data overhead. We proposethree approaches to achieve the reliability: Reliable Service Architecture using Middleware (RSAM), Reliable Approach using Middleware and Web Socket (RAMWS), and Reliable Approach using Mobile Agent and Web Socket (RMAWS). The RSAM focuses on ensuring and tracking the request execution under the communication limitations and service temporal unavailability constraints. It considers the most measurement factors including: request size, response size, and consuming time. We conducted experiments to compare the enhanced architectures with the traditional one. In these experiments, we covered several cases to prove the achievement of reliability. Results also show that the request size was found to be constant, the response size is identical to the traditional architecture, and the increase in the consumption time was less than 5% of the transaction time with the different response sizes. The RAMWS and RMAWShave proven to achieve the reliable web services consumption in terms of overcoming the Time-out problem. The RMAWS is a hybrid approach between the mobile agent approach and web socket protocol. The RAMWSarchitecture is a hybrid approach between the middleware approach and web socket open connection communication protocol. Moreover, we introduce theTwo-Response request approach, which the first is the temporary response that returns in a short time through the Representational State Transfer (REST) service response, and the other is the actual response,whichreturns smoothly through the open connection protocol.