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	1. MPLS Multicast tree label retention policy based on derivation state search
	YAN Yuan,MA Yue
	Computer Science and Technology 07 January 2019
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	Abstract:This paper studies the key techniques and problems of the label retention strategy of multi-point-to-multipoint multi-point (MP2MP) multicast tree based on MPLS, puts forward a multicast tree label retention strategy based on the derivation state search, and gives the label retention strategy based on MPLS MP2MP multicast tree. The single-broadcast LDP module in Quagga is extended to support the proposed MP2MP label retention strategy. Performance analysis and simulation results show that compared with the traditional MP2MP conservative label retention mode, the logically derived MPLS MP2MP label retention strategy can cut off traffic in time and have great convergence performance when the link converges.
	TO cite this article:YAN Yuan,MA Yue. MPLS Multicast tree label retention policy based on derivation state search[OL].[ 7 January 2019] http://en.paper.edu.cn/en_releasepaper/content/4746966


	2. Measurement Study of Today's Immersive Mobile VR Systems
	SUN Linhui
	Computer Science and Technology 21 December 2017
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	Abstract:Due to better mobility and lower prices, plenty of VR applications have been launched on mobile VR systems. Meanwhile, people still do not have a clear picture of mobile VR system\'s performance. To tackle this problem, this paper presents experiments to discover mobile VR system\'s performance and overhead. The experimental results disclose a fact that today\'s commodity smartphone cannot provide comfortable immersive VR experience because of its restricted hardware resources. On the basis of experiments, this paper also discusses major challenges and future directions for mobile VR\'s further optimizations.
	TO cite this article:SUN Linhui. Measurement Study of Today's Immersive Mobile VR Systems[OL].[21 December 2017] http://en.paper.edu.cn/en_releasepaper/content/4742761

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	3. Weighted Load Balancing in Datacenter Networks
	XU Xiuting, LIU Libin, LI Jinglin
	Computer Science and Technology 04 December 2017
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	Abstract:Load balancing in datacenter networks needs to cope with many issues, such as various workloads, dynamic network conditions, and topology asymmetry. However, previous works cannot handle them well and are not practical to be deployed in production datacenters. Hash-based load balancing solutions like ECMP can result in low throughput and long-tailed flow completion time because of hash collisions. Congestion-aware solutions such as CONGA and Expeditus can detect network congestions proactively. Unfortunately, they need dedicated hardware support and cannot be widely deployed in commodity datacenters. Although host-based solutions such as Presto and DRB remedy the shorcomings of congestion-ware ones, they are oblivious to network conditions. To do efficient load balance in commodity datacenter networks, this paper proposes \name, a weighted network load balancer located at each hypervisor that can detect network conditions and require no changes to network hardware switches. \name employs ECN to monitor the network congestions and detect failures via counting connection timeout and packet retransmission rate. It then automatically adjusts path weights accordingly to react to congestions and failures and does weighted load balancing at the granularity of flowcells. \name has been implemented on our testbed and evaluated with testbed experiments and simulations. The results show that \name achieves near-optimal performance in symmetric topology. Under failure or asymmetric scenarios, \name can shorten at least 2.3 times and 1.2 times FCT compared to ECMP and Presto.
	TO cite this article:XU Xiuting, LIU Libin, LI Jinglin. Weighted Load Balancing in Datacenter Networks[OL].[ 4 December 2017] http://en.paper.edu.cn/en_releasepaper/content/4742558


	4. An Algorithm on Video Caching Design in Content Delivery Network
	Kai Wu,Chensheng Wang,Guang Yang
	Computer Science and Technology 10 June 2017
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	Abstract:In recent years, multimedia traffic such as video on demand shows explosive growth on the Internet. Network operators are considering content delivery network as the main strategy to keep up with the increasing demand for video requests with the minimum possible delay. Layered video encoding strategies such as Scalable Video Coding enable different caches to store different layers of a video content, allowing successive improvement of the video stream quality. However, the caching placement of video encoding layers that minimize the average delay is NP-hard. We reduce the complexity of this problem to pseudopolynomial time by using a connection with multiple-choice knapsack problem. Numerical results show up to 25% reduction in delay over existing video caching strategies.
	TO cite this article:Kai Wu,Chensheng Wang,Guang Yang. An Algorithm on Video Caching Design in Content Delivery Network[OL].[10 June 2017] http://en.paper.edu.cn/en_releasepaper/content/4735355


	5. 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


	6. Name Based Socket : An approach for Android Based System
	Ahmed M.A. Alsayadi,Xu Mingwei
	Computer Science and Technology 21 September 2016
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	Abstract:IP address management has become more and more complex. For mobile applications, what makes IP management more complicated is the updates of IP address and the address translation of gateways. With the rapid growth of smartphones worldwide (Global sales of smartphones to end users totaled 349 million units in the first quarter of 2016, a 3.9 percent increase over the same period in 2015, according to Gartner, Inc.), this challenge has become even more urgent to be solved. In this paper, a method is introduced to solve IP management-related issues in Android based system using name based socket scheme (NBS). Android NBS relieves mobile applications from IP management and moves it down to the operation system level. Thus, the application itself is relieved from re-implementing features such as multi-homing, mobility, NAT traversal. And the complication of application developing will be reduced. In the meanwhile, the Android NBS is configurable and backward compatible, and it doesn't influence connection performance in any way, it also doesn't require any changes on the network architecture during using.
	TO cite this article:Ahmed M.A. Alsayadi,Xu Mingwei. Name Based Socket : An approach for Android Based System[OL].[21 September 2016] http://en.paper.edu.cn/en_releasepaper/content/4705039


	7. GSPN-based Model to Evaluatethe Performance and SecurityTradeoff in Ad-hocNetwork
	DENG Junyi,LIU Yanheng,ZHAO Rongcun,WANG Jian
	Computer Science and Technology 26 June 2016
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	Abstract:The performance and security tradeoff problemis always a critical issue in the research of Ad-hoc network. Researchers have presented many prioritization schemes. Because of these schemes from different aspects, we cannot compare them directly. We raise a widely used approach to evaluate the schemes which trade off between performance and security in Ad-hoc network. We first structurethe intra-node and inter-node data transmission modelsusing GSPN, then compute the performance, security and income with CMCT (continuous-time Markov chain).In this way, we put security strategies into a unifiedevaluation framework in order to achieve the optimal equilibrium solution,and the model provides the theory basis and data reliance for making efficient use of resources.
	TO cite this article:DENG Junyi,LIU Yanheng,ZHAO Rongcun, et al. GSPN-based Model to Evaluatethe Performance and SecurityTradeoff in Ad-hocNetwork[OL].[26 June 2016] http://en.paper.edu.cn/en_releasepaper/content/4697619


	8. An Adaptive Certificate Distribution Strategy in VANET
	DENG Junyi,LIU Yanheng,ZHAO Rongcun,WANG Jian
	Computer Science and Technology 26 June 2016
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	Abstract:IThe certificate can improve the security of VANET, but it will reduce the performance. Certificate distribution mechanism is a key to affect the security and performance. We propose anadaptive certificate distribution strategy that it is capable ofdynamicallyadjust distribution way according to the various circumstances in order to obtain the optimal equilibrium solution. The major method is setting a threshold which can adaptively change according to the traffic context and security situation. When it less than the ratio of new cars and all the cars in a given radio range, nodes send packets with certificate. Contrarily, nodes send packets without certificate. We also present a quantification model toevaluate the income of VANET, including the sending nodes, receiving nodes analysis and calculation of their overhead, security, loss, etc.The extensive simulation illustratethat the proposed strategy commendably tradeoffthe performance and security under various trafficconditions.
	TO cite this article:DENG Junyi,LIU Yanheng,ZHAO Rongcun, et al. An Adaptive Certificate Distribution Strategy in VANET[OL].[26 June 2016] http://en.paper.edu.cn/en_releasepaper/content/4697592


	9. 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


	10. Multi-packet decoding based on splitting same string for data retransmission in wireless sensor network
	Shaobin Cai,Dong jun,Feng Xiaoning,Pan Hongqi
	Computer Science and Technology 23 November 2015
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	Abstract:In MDNCBR (Multi-packet Decoding and Network Coding based on Broadcasting Retransmission), the receiver cannot decode when the encoded packets include at least two same data packets, called same string, and more packets has to be retransmitted. In order to solve this problem, the same strings in encoded packets are split to remove the unnecessary redundancy, and MDSSS (Multi-packet Decoding based on Splitting Same String) is proposed in this paper. The simulation results show that, compared with MDNCBR, the number of packet retransmissions of MDSSS, caused by same packets, are much fewer, and the network throughput of MDSSS is improved greatly. MDSSS performs particularly better than MDGCBR in complex wireless sensor networks.
	TO cite this article:Shaobin Cai,Dong jun,Feng Xiaoning, et al. Multi-packet decoding based on splitting same string for data retransmission in wireless sensor network[OL].[23 November 2015] http://en.paper.edu.cn/en_releasepaper/content/4664924

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