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A key management scheme for multicast based on layer 2 control

A key management scheme for multicast based on layer 2 contr...

引用

10th IEEE International Conference on computer and information Technology, CIT-2010, 7th IEEE International Conference on Embedded Software and Systems, ICESS-2010, 10th IEEE Int. Conf. Scalable Computing and Communications, ScalCom-2010

作者： Cao, Zheng Yin, Pengpeng Lu, Zhengjun School of Computer Science and Engineering Southeast University Nanjing 210096 China Key Laboratory of Computer Network Technology Jiangsu Province Nanjing 210096 China Key Laboratory of Computer Network and Information Integration Ministry of Education Nanjing 210096 China

ISBN: (纸本)9780769541082

This paper presents a key management scheme for multicast based on layer 2 control, which includes multicast authentication, secure multicast forwarding tree management, key distribution when users are initialized and periodical key updating. This scheme offers a set of methods for key distribution and updating with MLD snooping mechanism and MLD report filtering on access switches. This method reduces the complexity of the key updating problem when members leave the group by layer 2 control and guarantees the efficiency and security of key management. Compared with other schemes, this scheme performs better on computation cost and communication cost than them and has acceptable storage cost. © 2010 IEEE.

关键词： Multicasting

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Distance estimation by constructing the virtual ruler in anisotropic sensor networks

Distance estimation by constructing the virtual ruler in ani...

引用

IEEE INFOCOM 2010

作者： Wang, Yun Li, Kai Wu, Jie School of Computer Science and Engineering Southeast University Key Lab. of Computer Network and Information Integration Nanjing 210096 China Department of Computer and Information Sciences Temple University Philadelphia PA 119122 United States

ISBN: (纸本)9781424458363

Distance estimation is fundamental for many functionalities of wireless sensor networks and has been studied intensively in recent years. A critical challenge in distance estimation is handling anisotropic problems in sensor networks. Compared with isotropic networks, anisotropic networks are more intractable in that their properties vary according to the directions of measurement. Anisotropic properties result from various factors, such as geographic shapes, irregular radio patterns, node densities, and impacts from obstacles. In this paper, we study the problem of measuring irregularity of sensor networks and evaluating its impact on distance estimation. In particular, we establish a new metric to measure irregularity along a path in sensor networks, and identify turning nodes where a considered path is inflected. Furthermore, we develop an approach to construct a virtual ruler for distance estimation between any pair of sensor nodes. The construction of a virtual ruler is carried out according to distance measurements among beacon nodes. However, it does not require beacon nodes to be deployed uniformly throughout sensor networks. Compared with existing methods, our approach neither assumes global knowledge of boundary recognition nor relies on uniform distribution of beacon nodes. Therefore, this approach is robust and applicable in practical environments. Simulation results show that our approach outperforms some previous methods, such as DV-Distance and PDM. ©2010 IEEE.

关键词： Anisotropy

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A load adaptive IEEE 802.11e EDCA backoff scheme with enhanced service differentiation

A load adaptive IEEE 802.11e EDCA backoff scheme with enhanc...

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2010 IEEE 12th International Conference on Communication Technology, ICCT'2010

作者： Dong, Yongqiang Wang, Yun Xia, Qin School of Computer Science and Engineering Southeast University Nanjing 210096 China Key Laboratory of Computer Network and Information Integration Southeast University Ministry of Education Nanjing 210096 China

ISBN: (纸本)9781424468690

In view of the disadvantages of IEEE 802.11e EDCA in QoS guarantee and collision avoidance, an enhanced EDCA scheme called SD-AEDCA is presented which dynamically adjusts two EDCA parameters, namely contention window (CW) and backoff time counter (BC), according to channel load conditions and QoS requirements of network services. SD-AEDCA makes improvements to EDCA backoff scheme from post-backoff, upon-collision and post-transmission phases respectively by differentiating real-time and non real-time frames. Specifically, frozen rate is calculated to estimate the channel load conditions during EDCA backoff process and then used to guide CW and BC adjustment. And the waiting time is explored deliberately to satisfy the transmission latency requirements of real-time frames. Simulation results show that SD-AEDCA improves network throughput by reducing transmission collisions and provides more satisfactory QoS to real-time services at heavy load conditions. © 2010 IEEE.

关键词： Quality of service

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An effective heuristic for on-line tenant placement problem in SaaS

An effective heuristic for on-line tenant placement problem ...

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2010 IEEE 8th International Conference on Web Services, ICWS 2010

作者： Zhang, Yi Wang, Zhihu Gao, Bo Guo, Changjie Sun, Wei Li, Xiaoping School of Computer Science and Engineering Southeast University 210096 Nanjing China Key Laboratory of Computer Network and Information Integration Ministry of Education China IBM Research-China 100096 Beijing China

ISBN: (纸本)9780769541280

As one of the key characteristics of Software as a Service (SaaS), multi-tenancy aims to support massive customers by sharing application instances and databases. To achieve the high economies of scale, one of the most issues needing to be solved in the real industry is that, given a fixed number of nodes, how to optimally place on-boarding tenants to maximize the total supported number of tenants without violating their SLA requirements. This paper focuses on this problem, which is called On-line Tenant Placement Problem (OTPP). In order to calculate the resource consumption of onboarding tenants, a novel resource consumption estimation model for multi-tenant pattern is proposed in this paper. Based on this model, we explore the complexity of OTPP. A robust heuristic is proposed for the OTPP. The simulation experimental results show the high effectiveness and the good efficiency of our algorithm. © 2010 IEEE.

关键词： Application programs

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D-TDMA: An approach of dynamic TDMA scheduling for target tracking in wireless sensor networks

D-TDMA: An approach of dynamic TDMA scheduling for target tr...

引用

2010 IEEE/ACM International Conference on Green Computing and Communications, GreenCom 2010, 2010 IEEE/ACM International Conference on Cyber, Physical and Social Computing, CPSCom 2010

作者： Wang, Yun Shi, Peizhong Li, Kai Chen, Zhikui Department of Computer Science and Engineering Southeast University Key Lab. of Computer Network and Information Integration Nanjing 210096 China School of Software Technology Dalian University of Technology Dalian 116024 China

ISBN: (纸本)9780769543314

In the application of target tracking based on dynamic convey tree-based collaboration (DCTC) in wireless sensor networks, collisions and interferences among nodes pose a challenge for data aggregation. In this paper, we refine slot allocation to the nodes in dynamic convey tree and design an energy efficient MAC protocol called D-TDMA, which avoids collisions and interferences and allocates contiguous active slots to nodes as far as possible during data aggregation from leaf nodes to a root node. As a result, the energy consumption in switching from sleeping to active state is saved. Simulation results show that D-TDMA not only gets rid of the impact of collisions and interferences among nodes in dynamic convey tree, but also performs similar throughput to that of CSMA-like mechanism where nodes work without active/sleep scheduling strategy. Our protocol outperforms ESR in both energy efficiency and low delay. © 2010 IEEE.

关键词： Time division multiple access

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A cooperative method for supervised learning in Spiking neural networks

A cooperative method for supervised learning in Spiking neur...

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International Conference on computer Supported Cooperative Work in Design

作者： Hong, Shen Ning, Liu Xiaoping, Li Qian, Wang School of Computer Science and Engineering Southeast University Nanjing China School of Golden Audit Nanjing Audit University Nanjing China Key Laboratory of Computer Network and Information Integration Ministry of Education Southeast University Nanjing China

ISBN: (纸本)9781424467631

In Spiking neural networks, information is encoded in separate spike times. The traditional gradient descent based learning algorithm (SpikeProp) trends to be trapped in local optima and cannot converge if the negative synaptic weights are allowed. In this paper, a cooperative PSO (Particle Swarm Optimization) method is proposed for its supervised learning. A simplified neural network structure is suggested. The CPSO-based learning method can improve both the weights of the spike neurons and the delays between the neurons. Both the positive and negative weights can be preserved by the biological neurons. Experiments on benchmark problems show the proposal is reliable and efficient for learning spike patterns. © 2010 IEEE.

关键词： Neural networks

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Static Channel Assignment with the Physical Interference Model for Maximum Capacity in Multiradio Multi-channel Wireless Mesh networks

Static Channel Assignment with the Physical Interference Mod...

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The Ninth International Conference on Grid and Cloud Computing(第九届网格与云计算国际学术会议 GCC 2010)

作者： Birui Shao Jun Tao Fangfang Wang Key Laboratory of Computer Network and Information Integration of Ministry of Education Southeast University Nanjing 210096 China

In this paper, a model for the static channel assignment in multi-radio multi-channel wireless mesh networks is proposed. We describe an interference model in wireless communication environment. The degree of detail in the model determines the accuracy of channel assignment. In many wireless mesh networks studies, the simplistic protocol interference model is adopted, but the model is usually not realistic and practical. Therefore, we construct a physical interference model and put forward a pure integer quadratic programming (PIQP) model to solve the channel assignment problem and maximize the capacity of wireless mesh networks. The feasibility and effectivity of the channel assignment solution are suggested by the results of simulation.

关键词： physical interference model static channel assignment pure integer quadratic programming multi-radio multi-channel wireless mesh networks

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Search Using Semantic Inference in Unstructured P2P networks

Search Using Semantic Inference in Unstructured P2P Networks

引用

International Conference on Computational Intelligence and Software Engineering (CiSE)

作者： Ning Qian Guoxin Wu Key Laboratory of Computer Network and Information Integration Ministry of Education School of Computer Science and Engineering South-East University Nanjing China

Peer-to-Peer networks develop rapidly in the last few years. The search algorithm lies at the centre of these networks. Many search methods have been proposed for unstructured peer-to-peer networks, but complicated organization, high search cost and maintenance overhead make them less practicable. To avoid these weaknesses, in this paper, we propose an adaptive and efficient method for search in unstructured P2P networks, the Semantic Inference Search method (SIS). This approach is based on a simple and powerful principle similar to interest-based locality. It utilizes feedback of not only the requested objects but also semantically related objects from previous searches. It applies Bayesian network to establish an inference model, using semantic inference to direct future searches. Experimental results show that the SIS method achieves high success rate, more discovered objects, low bandwidth consumption, less maintenance and adaptation to changing network topologies.

关键词： Peer to peer computing Semantics Search problems Bayesian methods Random variables Inference algorithms

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A robust and secure overlay storage scheme based on erasure coding

A robust and secure overlay storage scheme based on erasure ...

引用

International Conference on Pervasive Computing and Applications (ICPCA)

作者： Chuanyou Li Yun Wang School of Computer Science and Engineering Ministry of Education Key Laboratory of Computer Network and Information Integration South-East University Nanjing China

Recently, in classical P2P overlay networks, with applying replication technique, a single peer is replaced by a cluster of peers in order to tolerant Byzantine failures. In this paper, a novel robust and secure scheme for storage overlay networks is proposed by applying erasure coding technique to reduce redundancy and enhance privacy protection. For achieving a lightweight data privacy protection, encoded strips are stored and dual distinct hash functions are deployed to construct hash chains to protect location information for encoded strips. Simulation results show that with different percentage of malicious peers, by adjusting encoding parameters, the scheme is available to provide durable data storage service.

关键词： Strips Encoding Routing Peer to peer computing Vectors Protocols Writing

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A key Management Scheme for Multicast Based on Layer 2 Control

A Key Management Scheme for Multicast Based on Layer 2 Contr...

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International Conference on computer and information Technology (CIT)

作者： Cao Zheng Yin Pengpeng Lu Zhengjun School of Computer Science and Engineering South-East University Nanjing China Key Laboratory of Computer Network and Information Integration Ministry of Education Nanjing China

关键词： Authentication Servers Encryption Control systems Filtering Unicast Protocols

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