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Modeling chunk-based content placement in information centric networking

The Journal of China Universities of Posts and Telecommunications 2017年第3期24卷 44-50页

作者： Wang Guoqing Liu Jiang Li Xiuqin Yang Shaoyu Li Guojia School of Software North China University of Water Resources and Electric Power State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications

content-centric networking （CCN） proposes a content-centric paradigm which changes the waist hourglass from Internet protocol （IP） to content chunk. In this paper, based on content chunks, an optimization model of minimizing the total delay time in information centric networking （ICN） is established, and branch-and-bound method and greedy （BG） algorithm is proposed to get the content placement method. As the multipath is natural supported in CCN, chunk-based content placement can decline delay time obviously, even it would increase the calculation amount which can be solved easily by the node＇s capacity. Simulation results indicate that the chunk-based content placement scheme is better than the single-based cache policy on the network total delay time, and the best number of each content chunk split is decided by the link density and the number of the nodes in the network.

关键词： information centric networking branch-and-bound method and greedy algorithm content placement chunk-based

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Joint content placement and Traffic Management for Cloud Mobile Video Distribution over Software-Defined Networks

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China Communications 2016年第8期13卷 1-12页

作者： Zhenghuan Zhang Xiaofeng Jiang Hongsheng Xi University of Science and Technology of China

To cope with the rapid growth of mobile video, video providers have leveraged cloud technologies to deploy their mobile video service system for more cost-effective and scalable performance. The emergence of Software-Defined Networking(SDN) provides a promising solution to manage the underlying network. In this paper, we introduce an SDN-enabled cloud mobile video distribution architecture and propose a joint video placement, request dispatching and traffic management mechanism to improve user experience and reduce the system operational cost. We use a utility function to capture the two aspects of user experience: the level of satisfaction and average latency, and formulate the joint optimization problem as a mixed integer programming problem. We develop an optimal algorithm based on dual decomposition and prove its optimality. We conduct simulations to evaluate the performance of our algorithm and the results show that our strategy can effectively cut down the total cost and guarantee user experience.

关键词： mobile cloud video software-defined networking content placement traffic routing

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Cache Hit Ratio Maximization in Device-to-Device Communications Overlaying Cellular Networks

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China Communications 2020年第2期17卷 232-238页

作者： Liang Zhong Xueqian Zheng Yong Liu Mengting Wang Yang Cao China University of Geosciences School of Mechanical Engineering and Electronic Information Department of Electronics and Information EngineeringWuhanChina Huazhong University of Science and Technology WuhanChina

This paper investigates the content placement problem to maximize the cache hit ratio in device-to-device(D2D)communications overlaying cellular *** consider offloading contents by users themselves,D2D communications and multicast,and we analyze the relationship between these offloading methods and the cache hit *** on this relationship,we formulate the content placement optimization as a cache hit ratio maximization problem,and propose a heuristic algorithm to solve *** results demonstrate that the proposed scheme can outperform existing schemes in terms of the cache hit ratio.

关键词： Cache hit ratio content placement device-to-device multicast

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