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检索条件"任意字段=Conference on Next-Generation Communication and Sensor Networks 2007"

共 1567 条记录，以下是141-150 订阅

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A cooperation mechanism for pure P2P file-sharing networks to improve application-level QoS

A cooperation mechanism for pure P2P file-sharing networks t...

引用

conference on next-generation communication and sensor networks 2006

作者： Wakamiya, Naoki Konishi, Junjiro Murata, Masayuki Osaka Univ Grad Sch Informat Sci & Technol Osaka Japan

ISBN: (纸本)0819464856

To provide application-oriented network services, a variety of overlay networks are deployed over physical IP networks. Since they share and compete for the same physical network resources, their selfish behaviors affect each other and, as a result, their performance deteriorates. In this paper, we propose a mechanism for pure P2P networks of file-sharing applications to cooperate with each other. In our proposal, a cooperative peer first finds another P2P network and establishes a logical link to a cooperative peer in the found network. Both ends of the logical link decide whether they cooperate or not from a viewpoint of the mutualism. When they consider they benefit from the cooperation, messages and files are exchanged among cooperative P2P networks through the logical link. For an efficient and effective cooperation, our mechanism has an algorithm for the selection of cooperative peers and a caching mechanism to avoid putting too much load on cooperative peers and cooperating networks. Simulation results showed that the number of discovered providing peers and the ratio of search hits increased about twice, while the load by the cooperation among P2P networks was reduced about half by caching.

关键词： P2P network file sharing cooperation symbiosis

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A study on a sequenced directed diffusion algorithm for sensor networks

A study on a sequenced directed diffusion algorithm for sens...

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9th International conference on Advanced communication Technology (ICACT 2007)

作者： Jang, Jaeshin Department of Information and Communications Engineering Inje University South Korea

ISBN: (纸本)9788955191318

Advances in wireless networking, micro-fabrication and integration, and embedded microprocessors have enabled a new generation of massive-scale sensor networks. Because each sensor node is limited in size and capacity, it is very important to design a new simple and energy efficient protocol. Among conventional sensor networks' routing protocols, the directed diffusion scheme is widely known because of its simplicity. This scheme, however, has a defect in that sending interest and exploratory data messages while setting connection paths consumes much energy because of its flooding scheme. Therefore, this paper proposes a new sensor network routing protocol, called sequenced directed diffusion with a threshold control, which compromises the conventional DD scheme's defect and offers an energy efficient routing idea. With a computer simulation, its performance is evaluated and compared to the conventional DD scheme. Numerical results show that the proposed scheme offers energy efficiency while routing packets, and resolves ill-balanced energy consumption among sensor nodes.

关键词： sequenced directed diffusion routing scheme sensor network

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A PKC-based node revocation scheme in wireless sensor networks

A PKC-based node revocation scheme in wireless sensor networ...

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International conference on Future generation communication Networking

作者： Chuang, Po-Jen Chang, Shao-Hsuan Lin, Chih-Shin Tamkang Univ Dept Elect Engn Taipei 25137 Taiwan

ISBN: (纸本)9780769530482

Generally deployed in an unattended environment, a sensor network can be easily assaulted or compromised by adversaries. Network security becomes a major problem. A distributed node revocation scheme is effective in reducing the damages a compromised node may cause to a sensor network, but its operation tends to consume large-scale memory space of the hardware-constrained sensor nodes. To reduce such complexity, this paper presents a new distributed voting revocation scheme based on the one-way hash chain, the concept of threshold secret sharing, the certificate revocation list and the public-key cryptography.

关键词： Public key cryptography

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Study on Security Management Architecture for sensor Network based on Intrusion Detection

Study on Security Management Architecture for Sensor Network...

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International conference on networks Security, Wireless communications and Trusted Computing

作者： Peng, Xi Wu, Zheng Xiao, Debao Yu, Yang Huazhong Normal Univ Dept Comp Sci Wuhan Peoples R China Wuhan Univ Sci & Technol City Coll Expt Ctr Wuhan Peoples R China Wuhan Univ Sch Comp Wuhan Peoples R China

ISBN: (纸本)9780769536101

Wireless sensor networks will play an important role in the next generation pervasive computing. But the character of wireless communication brings a great challenge to the security management measures used in the communication protocols. These measures are different from conventional network security management methods. This paper proposed a security management model for self-organizing wireless sensor networks based on intrusion detection. It can prevent most of attacks. Then an analysis of each layer of networks in our security model is discussed and the security management measures in the data link layer and network layer are described in detail especially.

关键词： wireless sensor network network management security management architecture intrusion detection

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3rd IEEE/Create-Net International conference on communication System Software and Middleware, COMSWARE

3rd IEEE/Create-Net International Conference on Communicatio...

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3rd IEEE/Create-Net International conference on communication System Software and Middleware, COMSWARE

ISBN: (纸本)9781424417971

The proceedings contain 114 papers. The topics discussed include: undersea wireless sensor network for ocean pollution prevention;an effective group-based key establishment scheme for large-scale wireless sensor networks using bivariate polynomials;performance evaluation of a new overloading scheme for cellular DS-CDMA with iterative multistage interference cancellation receiver;experiments with low power commodity hardware platforms for challenged networks;smart middleware for mutual service-network awareness in evolving 3GPP networks;power allocation schemes for cognitive radios;communication in personal healthcare;hierarchical modeling of the Axis2 Web services framework with FMC-QE;extracting dense communities from telecom call graphs;OFDM-MAC algorithms and their impact on TCP in next generation mobile networks;and a slotted ALOHA joint MAC-cum-routing protocol for data gathering sensor network applications.

关键词： Iterative methods

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An efficient key distribution scheme for heterogeneous sensor networks 07

An efficient key distribution scheme for heterogeneous senso...

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IWCMC 2007: 2007 International Wireless communications and Mobile Computing conference

作者： Hussain, Sajid Kausar, Firdous Masood, Ashraf School of Computer Science Acadia University Wolfville NS Canada College of Signals National University of Pakistan Rawalpindi Pakistan

ISBN: (纸本)1595936955

Key distribution refers to the problem of establishing shared secrets on sensor nodes such that secret symmetric keys for communication privacy, integrity and authenticity can be generated. In a wireless sensor network, pre-distribution of secret keys is possibly the most practical approach to protect network communications but it is difficult due to the ad hoc nature, intermittent connectivity, and resource limitations of the sensor networks. In this paper, we propose a key distribution scheme based on random key pre-distribution for heterogeneous sensor network (HSN) to achieve better performance and security as compared to homogeneous network which suffer from high communication overhead, computation overhead, and/or high storage requirements. In a key generation process, instead of generating a large pool of random keys, a key pool is represented by a small number of generation keys. For a given generation key and publicly known seed value, a one-way hash function generates a key chain, and these key chains collectively make a key pool. Each sensor node is assigned a small number of randomly selected generation keys. The proposed scheme reduces the storage requirements while maintaining the same security strength. Copyright 2007 ACM.

关键词： sensor networks

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Semi-supervised Subject Recognition through Pseudo Label generation in Ubiquitous sensor Data

Semi-supervised Subject Recognition through Pseudo Label Gen...

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International conference on communication Systems and networks (COMSNETS)

作者： Dhekane, Sourish Gunesh Vajra, Krishnam Banerjee, Dip Sankar Indian Inst Informat Technol Guwahati Dept Comp Sci & Engn Gauhati 781015 Assam India

ISBN: (纸本)9781728131870

The task of gait-based subject recognition (SR) in ubiquitous sensor environments has become popular due to its wide range of applications in biometric authentication and smart home products. In recent times, a significant amount of work has been done in SR using supervised learning algorithms on datasets having high modality. However, the process of annotation for SR is difficult due to the challenges like privacy and high manual cost, which results in a scarcity of labeled data samples. Also, for the datasets having less modality, the task of SR in a semi-supervised domain is sparsely explored and challenging. In this work, we analyze the effect of these two factors (sparse labels and low modality) which are critical for SR in ubiquitous data. We select two datasets of ubiquitous data that are relatively unexplored in the context of SR. The datasets, namely OPPORTUNITY and Smartphone used to perform SR using conventional supervised learning algorithms to benchmark the results. Then we perform extensive experimentation to analyze the effect of the aforementioned factors over the task of SR by studying the variations in classification accuracies. next, we propose our semi-supervised framework for SR based on the concept of pseudo labels to counter the adverse effects of low modality and lack of labels. Experimental results show that our approach offers up to 77% and 98% accuracy on the Smartphone and OPPORTUNITY dataset respectively.

关键词： Subject Recognition Ubiquitous data analytics Pseudo Label generation Semi-Supervised learning

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Coverage and Connectivity Aware Data Gathering Protocol for Wireless sensor networks 2

Coverage and Connectivity Aware Data Gathering Protocol for ...

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2nd IEEE International conference on next generation Computing Technologies (NGCT)

作者： Tomar, Vishakha Singh, Dharmendra GLBITM Greater Knowledge Pk 3 Greater Noida Uttar Pradesh India JIIT Noida Sec 62 Noida India

ISBN: (纸本)9781509032570

Wireless sensor networks (WSNS) is a collection of sensor nodes whose basic functionality is to monitor the region in which they are deployed. Main research issues in designing a protocol for WSNs is, how to minimize energy consumption and prolong the network lifetime, while ensuring the required coverage as well as connectivity. In this paper, we present a coverage and connectivity aware data gathering protocol to provide sufficient coverage and connectivity in the network. The proposed protocol reduces the energy consumption of a network using a sleep scheduling scheme to periodically turn on and off the communication radios. A backbone of relay nodes and independent nodes is maintained for ensuring the connectivity in the network and this is also periodically rebuild the backbone setup. Each node transmits its sensory data to its closest independent node and an independent node forwards the sensed data via relay nodes toward the sink. The proposed protocol does not use any geographic information and is a fully distributed. Simulation results show that the proposed protocol consumes less energy consumption compare to existing protocol and also prolong the network life time, while maintaining connectivity and coverage.

关键词： Backbone network Independent node relay node sleep scheduling WSNs

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Fixed-rate layered multicast congestion control

Fixed-rate layered multicast congestion control

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conference on next-generation communication and sensor networks 2006

作者： Zhang Bing Yuan Bing Liu Zengji Xidian Univ State Key Lab Integrated Serv Networks Xian 710071 Shaanxi Peoples R China

ISBN: (纸本)0819464856

A new fixed-rate layered multicast congestion control algorithm called FLMCC is proposed. The sender of a multicast session transmits data packets at a fixed rate on each layer, while receivers each obtain different throughput by cumulatively subscribing to deferent number of layers based on their expected rates. In order to provide TCP-friendliness and estimate the expected rate accurately, a window-based mechanism implemented at receivers is presented. To achieve this, each receiver maintains a congestion window, adjusts it based on the GAIMD algorithm, and from the congestion window an expected rate is calculated. To measure RTT, a new method is presented which combines an accurate measurement with a rough estimation. A feedback suppression based on a random timer mechanism is given to avoid feedback implosion in the accurate measurement. The protocol is simple in its implementation. Simulations indicate that FLMCC shows good TCP-friendliness, responsiveness as well as intra-protocol fairness, and provides high link utilization.

关键词： layered multicast congestion control TCP-friendliness GAIMD

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A Deep Reinforcement Learning Based UAV Trajectory Planning Method For Integrated Sensing And communications networks 98

A Deep Reinforcement Learning Based UAV Trajectory Planning ...

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98th IEEE Vehicular Technology conference (VTC-Fall)

作者： Lin, Heyun Zhang, Zhihai Wei, Longkun Zhou, Zihao Zheng, Tian Guangxi Power Grid Dispatching Control Ctr Nanning Peoples R China Guangxi Power Grid Co Ltd Nanning Power Supply Bur Nanning Peoples R China South China Univ Technol Sch Elect & Informat Engn Guangzhou Peoples R China

ISBN: (纸本)9798350329285

With the development of information technology, the next-generation information technologies such as artificial intelligence, digital twin and reconfigurable intelligent surface have become key research areas for current 6G networks. In addition, to improve the end-to-end information processing capability in the next-generation networks and better meet the demand for high-speed communication and high-precision sensing for digital twin, Virtual Reality and Augmented Reality immersive services in the 6G networks, integrated sensing and communications (ISAC) has emerged. To deal with the conflict between high-quality communication services and low-latency sensing targets in an ISAC architecture, this paper investigates a UAV-assisted ISAC system in which the UAV adopts a flight-hover-communication protocol. In particular, the UAV communicates with Internet of Things (IoT) devices during the hovering period, while it senses the location of targets during the flying period. To maximize the number of connected IoT devices and minimize the energy consumption of the UAV, a deep reinforcement learning (DRL) based trajectory planning algorithm is designed. The numerical results demonstrate that the proposed algorithm can effectively detect sensor devices as well as collect sensor data.

关键词： Integrated sensing and communications unmanned aerial vehicle trajectory planning deep reinforcement learning

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