Software infrastructures for mobile cloud computing

“云计算”是一个宽泛的术语，包括作为服务在互联网上交付的应用程序/功能以及托管它们的软件/硬件基础设施。这种“效用计算模型”(John McCarthy，1961)允许个人和组织以即付即用的方式购买虚拟硬件(基础设施即服务，IaaS)、软件平台(平台即服务，PaaS)或应用程序/功能(软件即服务，SaaS)，类似于计量购买电力、天然气或水。虽然云计算传统上被视为组织外包IT基础设施的一种手段，但也可以用来为数十亿移动手持设备(移动/智能电话)提供额外资源。尽管移动手机如今被大量用于数据通信，尤其是短信以及电子邮件和浏览等基本互联网服务，但其有限的计算资源限制了它们对作为网络服务交付的应用程序/功能的访问。为了克服这一挑战，Mark Baccue提出了移动云计算的概念，它基于使用云托管软件组件(例如代理)来帮助移动手机访问Web服务的概念。

"Cloud Computing" is a broad term that encompasses applications/functionality delivered as services over the internet and the software/hardware infrastructure to host them. This "utility computing model" (John McCarthy, 1961), allows individuals and organizations to purchase virtualized hardware (Infrastructure as a Service, IaaS), software platforms (Platform as a Service, PaaS) or applications/functionality (Software as a Service, SaaS) in a pay-as-you-go manner, comparable to the metered purchase of electricity, gas or water. While seen traditionally as a means for organizations to outsource IT infrastructure, cloud computing can also be used to provide the billions of mobile handsets (mobile/smart phones) with additional resources. While mobile handsets are nowadays heavily used for data communication most notably SMS and basic internet services like email and browsing, their limited computational resources restrict their access to applications/ functionality delivered as web services. To overcome this challenge Mark Baccue proposed the idea of Mobile Cloud Computing, which is based on the concept of using cloud-hosted software components (e.g. proxies) to aid mobile handsets in accessing web services.