Research Of Schedule In Wireless Peer-To-Peer Nework For Proximal Content Distribution

With the evolution of wireless network technology and the growing capability of mobile devices, the need for ubiquitous access to services, anytime, anywhere, has been significantly increased. Besides, the demand on content distribution service is booming in the wireless environment, such as popular news download, live sport events multicasting, or file distribution. However, the bandwidth constraints of wireless networks limit the terminals’bit rates, consequently, increasing the download time and the energy consumption of the User Terminals. Moreover, the diversity of content increase users’difficulty when choosing favorite content, and affect user experience in the content distribution.In addition, the User Terminals are generally equipped with one more wireless interfaces, one is long rang wireless technology (such as UMTS/HSPA, WCDMA, or LTE), and the other is short range wireless technology (such as WLAN, Bluetooth). To overcome the weaknesses of limited wireless resources, User Terminals could connect with each other through short range interfaces when using long rang wireless technology to download the content, as to enhance the efficiency of the content distribution, reduce content download time, and decrease the terminal energy consumption.Considering this background, the thesis consults to the characteristics of CDN and P2P technology, and follows the idea of CCN. Based on CoP (CDN-over-P2P) architecture, the thesis designs a system of wireless content distribution in multiple terminals cooperation, including the overall architecture of the system in detail design idea, the framework of control plane, to achieve content cache in network and terminals side. Through terminals’collaboration, system could schedule the content resource, to improve the efficiency of proximal content distribution, and bring better experience for users. Meanwhile, in the process of cooperative content distribution, running multiple interfaces simultaneously can significantly lead to rapid reduction of terminals’ energy, as to affect the user experience on the content delivery services. So the paper analyses energy consumption’s fairness problem in cooperative process, using Nash Bargaining solution to schedule the content distribution, to achieve the fairness of energy consumption among User Terminals. Meanwhile, in the two processes of content distribution, the choice and download of content, the thesis analyzes the influence of group size for the group recommendation and terminals’cooperation, then defines a metrics of user satisfaction, and proposes a group strategy, to control group size and improve the user satisfaction for wireless content distribution.Combination of the above analysis, the main contribution of this thesis includes:the content distribution system design in multiple terminals’cooperation; the content schedule scheme using Nash Bargaining solution; the terminals groups scheme based on the influence of group size. According the two different schedule schemes, the thesis finishes the research of schedule technology in wireless peer-to-peer network for proximal content distribution.