本文選題：移動云計算 + 數據格式��； 參考：《中國地質大學（北京）》2014年碩士論文

【摘要】：隨著云計算技術和移動互聯網技術的快速發(fā)展，云端和移動端相結合而形成的移動云計算模式將深刻改變人們的生活方式。當今移動網絡的快速發(fā)展也使得人們對通信服務的類型要求越來越豐富和質量要求越來越高。人們希望不管是在公司、家中、酒店還是在路上，都可以輕松而高效地處理日常事務、辦理工作業(yè)務和協作通信等等，這就要求移動通信可以提供穩(wěn)定的、實時的通信環(huán)境。但是由于移動終端的處理能力、續(xù)航能力和存儲容量都有限，尤其當移動終端設備通過無線網絡接入互聯網進行大數據量傳輸的時候，會產生一個非常大的電量消耗。因此，在保證通信穩(wěn)定性和及時性的前提下，提高移動通信設備在通訊過程中的能效，是一個迫切需要解決的問題。本文將比較成熟的云計算技術和當下正蓬勃發(fā)展的移動互聯網相結合，研究如何充分利用兩者各自的優(yōu)勢，為移動設備提供一個高效、便捷、穩(wěn)定的通訊環(huán)境。 本文通過深入研究云計算的特性和移動終端設備連接云端的方式，提出了一個優(yōu)化的移動云計算環(huán)境下即時通訊的框架。圍繞該框架，我們從數據傳輸格式優(yōu)化技術以及如何利用Markov模型改進網絡切換策略等方面進行深入研究。首先，介紹框架云端和移動客戶端的設計；云端分為多個層次，主要有數據緩存層、數據存儲層和網絡切換預測引擎；移動客戶端則根據功能分為多個模塊，主要有通信、數據轉換、網絡管理和UI交互等四個模塊。然后，介紹了上述各層次和模塊的具體實現細節(jié)；在數據轉換的實現中，采用了一種解析速度更快、數據體積量更小的數據格式Protobuf取代現有的XML或JSON格式；網絡切換預測引擎的實現過程則引入了二階Markov模型，，為用戶提供網絡切換策略，使用戶知道在何地更應該使用何網絡，從而達到節(jié)省移動端的電量、流量消耗的目的。最后，根據移動云計算環(huán)境下即時通訊框架實現的原型系統(tǒng)，通過應用實例的測試，給出使用框架后進行數據傳輸的能耗情況，驗證框架的節(jié)能優(yōu)勢。
[Abstract]:With the rapid development of cloud computing technology and mobile Internet technology, the mobile cloud computing model formed by the combination of cloud and mobile terminal will profoundly change people's way of life. Nowadays, with the rapid development of mobile network, people demand more and more types of communication services and higher quality requirements. People hope that whether in the company, home, hotel or on the road, they can easily and efficiently handle daily affairs, work business and cooperative communication, etc., which require mobile communication to provide a stable, real-time communication environment. However, due to the processing capacity of the mobile terminal, the capacity and storage capacity of the mobile terminal are limited, especially when the mobile terminal equipment is connected to the Internet through the wireless network for large amount of data transmission, it will produce a very large consumption of electricity. Therefore, on the premise of ensuring the stability and timeliness of communication, it is an urgent problem to improve the energy efficiency of mobile communication equipment in the communication process. This paper combines the mature cloud computing technology with the booming mobile Internet, and studies how to make full use of their respective advantages to provide an efficient, convenient and stable communication environment for mobile devices. By studying the characteristics of cloud computing and the way that mobile terminal devices connect to the cloud, this paper proposes an optimized framework for instant communication in mobile cloud computing environment. Around this framework, we study the data transmission format optimization technology and how to improve the network handoff strategy using Markov model. First of all, the design of the framework cloud and mobile client is introduced. The cloud is divided into several levels, including data buffer layer, data storage layer and network switch prediction engine, and mobile client is divided into several modules according to its functions. Data conversion, network management and UI interaction are four modules. Then, the implementation details of the above layers and modules are introduced. In the implementation of data conversion, a new data format, Protobuf, which is faster in parsing speed and smaller in volume, is used to replace the existing XML or JSON format. The second order Markov model is introduced in the implementation of the network handoff prediction engine, which provides users with a network handover strategy and enables users to know where and where they should use the network so as to save the power consumption and traffic consumption of the mobile terminal. Finally, according to the prototype system of instant communication framework in mobile cloud computing environment, through the test of application examples, the energy consumption of data transmission after using the framework is given, and the advantages of energy saving of the framework are verified.
【學位授予單位】：中國地質大學（北京）
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP311.52;TN929.5

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