The widespread usage of mobile applications with the limited resources of mobile devices pushed towards the investment in Mobile Cloud Computing (MCC). In MCC, web services are available on the cloud server and are invoked by mobile applications whenever and wherever needed via a hybrid wired and wireless networks. One of the most important issues in the mobile experience is the web service request Time-out problem. This problem is tightly coupled with the increase in the service response size, database query time, and the required computations on the server, which occurs because of the increased application usage. This paper proposes a Reliable Approach using Middleware and WebSockets (RAMWS) that overcomes the Time-out problem and achieves reliable web service consumption. The enhanced architecture is a hybrid between the middleware approach and the WebSocket open connection communication protocol. The RAMWS reduces the network usage time up to 7 times better than the direct-cloud approach (Invoking the cloud service directly from the mobile device), by using the shortest time response from two expected responses, and accordingly, enhances the mobile experience.

在移动设备资源有限的情况下，移动应用程序的广泛使用推动了对移动云计算（MCC）的投资。在MCC中，Web服务可在云服务器上使用，并在需要时通过混合有线和无线网络随时随地由移动应用程序调用。移动体验中最重要的问题之一是Web服务请求超时问题。此问题与服务响应大小，数据库查询时间以及服务器上所需的计算量的增加紧密相关，这是由于应用程序使用量增加而发生的。本文提出了一种使用中间件和WebSockets（RAMWS）的可靠方法，该方法克服了超时问题并实现了可靠的Web服务使用。增强的体系结构是中间件方法和WebSocket开放连接通信协议之间的混合体。通过使用两个预期响应中最短的响应时间，RAMWS可以将网络使用时间比直接云方法（直接从移动设备调用云服务）缩短多达7倍，从而提高了移动体验。