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There are 27 papers published in subject: > since this site started. |
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1. A Novel Cloud Video Delivery Mechanism in Mobile Social Networks | |||
LU Dianjie,HU Bin,ZHENG Xiangwei,LIU Hong,ZHANG Guijuan | |||
Computer Science and Technology 08 December 2016 | |||
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Abstract:Cloud-based Video Delivery Networks (C-VDNs) have received considerable attention recently. Different from traditional Video Delivery Networks (VDNs), C-VDNs can provide scalable resources without investments on deploying infrastructure. However, current C-VDNs strategies cannot be readily applied to Mobile Social Networks (MSNs). The major challenge is the video delivery problem that deals with the surrogate site selection and the delivery path building under the constraints of cloud resource. The dynamic characteristics of mobile users and videos in MSNs further aggravate the problem. To solve these problems, we propose a session-based MIP (Mixed Integer Program) model to coordinates the surrogate site selection and the delivery routing building. This model considers the mobility of mobile users and the dynamic changing of videos through graph extension and session construction respectively. Since this problem is known to be NP-hard, we relax the integer constraints and design a heuristic algorithm to get the optimal solution. Simulation experiments show that our proposed algorithm is efficient in terms of both performance and rental cost. | |||
TO cite this article:LU Dianjie,HU Bin,ZHENG Xiangwei, et al. A Novel Cloud Video Delivery Mechanism in Mobile Social Networks[OL].[ 8 December 2016] http://en.paper.edu.cn/en_releasepaper/content/4713462 |
2. Energy-Efficient Cooperative Communications with Shared Relay in Wireless Network | |||
Deng Hou, Huang Liu-Sheng, Leng Bing, Xu Hong-Li | |||
Computer Science and Technology 17 May 2016 | |||
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Abstract:With the increasing of the number of mobile devices, energy-efficiency and quality-of-service (QoS) are both important for wireless network.In the recent years, cooperative communication (CC) has been proposed to achieve spatial diversity without additional equipments and antennas.It is indicated that a good relay assignment scheme of CC is effective in improving energy-efficiency greatly in many literatures.In this paper, we first introduce the feasibility of shared relay assignment to improve the energy-efficiency. Then, the Minimum Energy Consumption for capacity requirement (MEC) problem of CC with shared relay will be defined, and we show it is NP-hard. We propose a heuristic algorithm (SRAE) to solve this problem, which is based on the thought of greedy algorithm. We conduct abundant simulation experiments to evaluate the performance of our proposed algorithm. The simulation results show that the SRAE algorithm can save about 54% energy consumption in wireless network. | |||
TO cite this article:Deng Hou, Huang Liu-Sheng, Leng Bing, et al. Energy-Efficient Cooperative Communications with Shared Relay in Wireless Network[OL].[17 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4691808 |
3. Energy-Saving Scheme and Control Framework in Data Center Network | |||
Tao Xiaoqing,Zhang Yinghai | |||
Computer Science and Technology 23 September 2015 | |||
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Abstract:Modern data centers require abundant network devices, servers to provide high quality of various resources such as computing, storage and switching. Since data center network is designed for busy-hour load, it faces a problem that the average utilization rate of network devices is far below the total network capacity. In this paper, we propose an energy-saving scheme and a control framework based on OpenFlow to deal with this problem. To balance network capacity and energy saving, the key idea is to implement a comprehensive scheme with traffic prediction and management of switches. Our simulation results show that the scheme not only balances energy saving and network capacity nicely, but also optimizes response time with little extra energy consumption. | |||
TO cite this article:Tao Xiaoqing,Zhang Yinghai. Energy-Saving Scheme and Control Framework in Data Center Network[OL].[23 September 2015] http://en.paper.edu.cn/en_releasepaper/content/4655778 |
4. Fair Network Bandwidth Allocation in IaaS Datacenters via a Cooperative Game Approach | |||
GUO Jian, LIU Fangming, John C.S. Lui, JIN Hai | |||
Computer Science and Technology 03 December 2014 | |||
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Abstract:With wide application of virtualization technology, tenants are able to access isolated cloud services by renting the shared resources in datacenters. Unlike resources such as CPU and memory, datacenter network, which relies on traditional transport-layer protocols, suffers unfairness due to a lack of VM-level bandwidth guarantees. In this paper, we model the datacenter bandwidth allocation as a cooperative game, towards VM-based fairness across the datacenter with two main objectives: (i) guarantee bandwidth for VMs based on their base bandwidth requirements, and (ii) share residual bandwidth in proportion to weights of VMs. Through a bargaining game approach, we propose a bandwidth allocation algorithm, emph{Falloc}, to achieve the asymmetric Nash bargaining solution (NBS) in datacenter networks, which exactly meets our objectives. The cooperative structure of algorithm is exploited to develop an online algorithm for practical real-world implementation. We validate emph{Falloc} with experiments under diversed scenarios, and show that by adapting to different network requirements of VMs, emph{Falloc} can achieve fairness among VMs and balance the tradeoff between bandwidth guarantee and proportional bandwidth sharing. Our large scale trace-driven simulations verify that emph{Falloc} achieves high utilization while maintaining fairness among VMs in datacenters. | |||
TO cite this article:GUO Jian, LIU Fangming, John C.S. Lui, et al. Fair Network Bandwidth Allocation in IaaS Datacenters via a Cooperative Game Approach[J]. |
5. Software Defined Networking: Technologies and Solutions toward an Open Network Eco-System | |||
LIU Fangming,GUO Jian | |||
Computer Science and Technology 15 October 2014 | |||
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Abstract:Software-Defined Networking (SDN), a new networking paradigm decoupling the software control logic from the data forwarding hardware, promises to enable simpler management, more flexible resource usage and faster deployment of network services. It opens network functionality, application programmability, and control-to-data communication interfaces that used to be closed in conventional network devices, offering endless opportunities but also challenges for both existing players and newcomers in the market. Through a comprehensive and comparative exploratory of SDN stat-of-the-art techniques, standardization activities and realistic applications, this article unveils historic and technical insights into the innovations that SDN offers toward an emerging open network eco-system. We closely examine the critical challenges and opportunities when the networking industry is been reshaped by SDN. We further shed light on future development directions of SDN in broad application scenarios, ranging from cloud datacenters, network operating systems, and advanced wireless networking. | |||
TO cite this article:LIU Fangming,GUO Jian. Software Defined Networking: Technologies and Solutions toward an Open Network Eco-System[OL].[15 October 2014] http://en.paper.edu.cn/en_releasepaper/content/4613737 |
6. On-demand gateway broadcast scheme for connecting mobile ad hoc networks to the Internet | |||
XU Huaqiang,JU Lei,GUO Chongxian,JIA Zhiping | |||
Computer Science and Technology 28 July 2014 | |||
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Abstract:Gateway discovery algorithm is a fundamental protocol for interconnecting mobile ad hoc network (MANET) with the Internet. In most existing schemes, each gateway node broadcasts gateway advertisements to announce its presence. The decision of when to emit advertisements can influence the performance of the network. Traditional gateway discovery schemes adopt the method of periodically emitting advertisements with a time interval. However, this method does not well fulfill the actual needs of the source nodes. This paper proposes a novel adaptive scheme for gateway discovery, in which the gateway broadcasts advertisements only on-demand instead of periodic emission. In order to obtain the network's actual demands for gateway advertisement, routes to the gateway are monitored. In particular, if any route is predicted to be broken, the source node requires fresh gateway advertisements to update routes, and then the gateway will be triggered to broadcast to fulfill such demands. We study the performance of on-demand gateway discovery scheme by a comparison approach. The results show that the proposed adaptive gateway discovery scheme greatly outperforms the conventional solutions: it is capable of achieving higher packet delivery ratio and lower end-to-end delay, while minimizing the routing overhead. | |||
TO cite this article:XU Huaqiang,JU Lei,GUO Chongxian, et al. On-demand gateway broadcast scheme for connecting mobile ad hoc networks to the Internet[J]. |
7. Maximum Multiflow in Wireless Network Coding | |||
ZHOU Jin-Yi,XIA Shu-Tao,JIANG Yong,ZHENG Hai-Tao,XIA Shu-Tao | |||
Computer Science and Technology 29 March 2013 | |||
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Abstract:In a multihop wireless network, wireless interference is a crucial factor in the maximum multiflow (MMF) problem, which studies the maximum throughput between multiple pairs of sources and sinks with a link schedule to support it.In this paper, we observe that network coding could help to decrease the impact of wireless interference, and thus propose a framework to study the MMF problem for multihop wireless networks with network coding.Firstly, a network model is established to describe the new conflict relations and schedulability modified by network coding.Next, we formulate the MMF problem to compute the maximum throughput of multiple unicast flows supported by the multihop wireless network with network coding, and show that its capacity region could be enlarged by performing network coding.Finally, we show that determining the capacity region of a multihop wireless network with network coding is an NP-hard problem, and thus propose a greedy heuristic algorithm, called coding-first collecting (CFC), to determine a capacity subregion of the network.We also show that finding an optimal hyperarc schedule to meet a given link demand function is NP-hard, and propose a polynomial algorithm, called coding-first scheduling (CFS), to find an approximate fractional hyperarc schedule in the multihop wireless network with network coding.A numerical analysis of a grid wireless network and a random wireless network is presented to demonstrate the efficiencies of the CFC algorithm and the CFS algorithm based on the framework. | |||
TO cite this article:ZHOU Jin-Yi,XIA Shu-Tao,JIANG Yong, et al. Maximum Multiflow in Wireless Network Coding[OL].[29 March 2013] http://en.paper.edu.cn/en_releasepaper/content/4529606 |
8. Hierarchical Geographical Tags Based Routing Scheme in Delay/Disruption Tolerant Mobile ad hoc Networks | |||
YU Chen,BAO Chencheng,JIN Hai | |||
Computer Science and Technology 04 March 2013 | |||
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Abstract:Delay/Disruption tolerant mobile ad hoc networks and opportunistic networks make it possible to support the communications among mobile hosts in intermittent connected scenarios. Routing in such environments is difficult because little information about the topology of the partitioned network and transient transmit opportunities between hosts. In this paper, we present a hierarchical geographical tags based routing scheme (HGTR) in such situation, which combines geographic information assistant forwarding with encounter-based forwarding by exploiting the knowledge about the behavior of the nodes. In our HGTR, network territory is partitioned level-by-level and attached with hierarchical tags to perform this geographic-based forwarding. Messages are greedily transmitted to the home location of the destination node where the particular node has a high probability to appear, which remarkably increasing the efficiency. During the transmission, metrics of tag similarity and visiting probability are utilized to make forward decision. We illustrate the routing process and evaluate the performance of our proposed solution in comparison with various routing solutions such as Direct Delivery, Epidemic, Prophet and MaxProp. Simulation results show that our proposed solution provides higher delivery ratio compare to a number of well-known protocols, and incurs acceptable extra overhead. | |||
TO cite this article:YU Chen,BAO Chencheng,JIN Hai. Hierarchical Geographical Tags Based Routing Scheme in Delay/Disruption Tolerant Mobile ad hoc Networks[OL].[ 4 March 2013] http://en.paper.edu.cn/en_releasepaper/content/4523529 |
9. Research and Implementation of a Distributed Network Measurement System Based on Cloud Computing | |||
Zhang Qing,Jin Yuehui | |||
Computer Science and Technology 25 December 2012 | |||
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Abstract:In this paper, a distributed network measurement system is put forward based on Cloud Computing. Nowadays, as network technology is flourishing, applications over IP network become more and more popular. More and more attention is drawn in the field of network performance. Network performance metrics are important references in the process of analyzing network behavior, solving network fault and forecasting new traffics. Therefore, we designed and implemented a distributed network measurement system based on Hadoop, a widespread Cloud Computing framework. Cloud computing framework guarantees reliable storage and effective processing of mass data. Mass data of network performance indicators are stored and calculated using tools provided by Hadoop framework, which helps to evaluate network performance more reliably and efficiently. | |||
TO cite this article:Zhang Qing,Jin Yuehui. Research and Implementation of a Distributed Network Measurement System Based on Cloud Computing[OL].[25 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4506753 |
10. Design and Implementation of the HDFS-based Cloud Storage Encryption Access Network | |||
TANG Xiaoyang,WEN Qiaoyan | |||
Computer Science and Technology 24 December 2012 | |||
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Abstract:Cloud storage has advantageous characteristics of high reliability, high versatility, high scalability and high capacity. However, in terms of data privacy there are some anxious shortcomings which could not be ignored. Cloud storage users tend to worry about that the data saved in cloud storage may be malicious used by service providers, or when cloud storage service provider has been attacked, the data may be spied, stolen or tampered with. The HDFS-based Cloud Storage Encryption Access Network studied in this paper is designed for enterprise users to protect their data privacy from being invaded. It will sweep away the misgiving about data privacy problems, so as to make cloud storage service much more acceptable. | |||
TO cite this article:TANG Xiaoyang,WEN Qiaoyan. Design and Implementation of the HDFS-based Cloud Storage Encryption Access Network[OL].[24 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4506477 |
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