Cloudlets: at the leading edge of cloud-mobile convergence
Cloudlets: at the leading edge of cloud-mobile convergence
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DOI：
10.1145/2465478.2465494
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发表时间：
2013-06
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影响因子：
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通讯作者：
M. Satyanarayanan
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文献类型：
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作者：
M. Satyanarayanan
自从二十年前移动的计算出现以来，移动性的独特约束已经塑造了系统的软件架构。我们现在正站在计算领域下一个重大变革的门槛上：在这个变革中，移动的设备的丰富感知和交互能力与云中的计算密集型和数据密集型处理无缝融合。这预示着一种新的软件类型，它在移动的环境中增强了人类的感知和认知。实现这一愿景的一个主要障碍是移动终端和云之间的端到端WAN延迟大而多变，以及WAN中断的可能性。Cloudlets已经成为解决这个问题的架构解决方案。小云代表三层结构的中间层：移动终端--小云--云，可以将其视为“盒子中的数据中心”，其目标是“拉近云的距离”。基于Cloudlet的硬件/软件生态系统激发了未来的愿景，例如为注意力受到挑战的移动的用户提供认知辅助，第一人称视频的可扩展众包，以及对传统世界的无处不在的移动的访问。实现这些愿景需要克服许多技术挑战。它还要求我们重新思考隐私、软件许可和商业模式等领域的广泛问题。
Since the dawn of mobile computing two decades ago, the unique constraints of mobility have shaped the software architectures of systems. We now stand at the threshold of the next major transformation in computing: one in which the rich sensing and interaction capabilities of mobile devices are seamlessly fused with compute-intensive and data-intensive processing in the cloud. This heralds a new genre of software that augments human perception and cognition in a mobile context. A major obstacle to realizing this vision is the large and variable end-to-end WAN latency between mobile device and cloud, and the possibility of WAN disruptions. Cloudlets have emerged as an architectural solution to this problem. A cloudlet represents the middle tier of a 3-tier hierarchy: mobile device -- cloudlet -- cloud, and can be viewed as a "data center in a box" whose goal is to "bring the cloud closer". A cloudlet-based hardware/software ecosystem inspires futuristic visions such as cognitive assistance for attention-challenged mobile users, scalable crowd-sourcing of first-person video, and ubiquitous mobile access to one's legacy world. Realizing these visions will require many technical challenges to be overcome. It will also require us to rethink a wide range of issues in areas such as privacy, software licensing, and business models.