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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111-120 订阅

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Pattern-based communication: A new paradigm for energy-aware wireless networks 2

Pattern-based communication: A new paradigm for energy-aware...

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2nd International conference on Information and communication Technologies: From Theory to Applications, ICTTA 2006

作者： Taherkordi, Amirhosein Taleghan, Majid Alkaee Sharifi, Mohsen Computer Engineering Department Iran University of Science and Technology Iran

ISBN: (纸本)0780395212

The low resource availability in the nodes of recent wireless networks has raised several new issues in the design of their hardware and software components. One of the high level approaches for optimizing resource usage in these networks is to reduce the number of communications among wireless nodes. In this paper, we propose a new paradigm for optimizing the number of data transmissions between nodes according to new attributes of next generation networks with wireless, energy-aware and data-centric features. We nickname our approach Pattern-Based communication. In pattern-based communication, every client issues its interest about receiving data according to some predefined patterns. If the set of data satisfies a pattern condition then the node sends the result of processing of this set of data to every client who is interested instead of sending all of them in turn. We evaluated our solution in a cluster-based wireless sensor network and show how the proposed communication model could optimize resource consumptions in sensor nodes. © 2006 IEEE.

关键词： next generation networks

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Enhancement in DDCSA for Improving Power Consumption and Network Lifetime of Wireless sensor networks using Geographical Forwarding with Face Routing Technique 5th

Enhancement in DDCSA for Improving Power Consumption and Net...

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5th International conference on Confluence - The next generation Information Technology Summit (Confluence)

作者： Sharma, Naveen Rani, Malti Nayyar, Anand Punjab Inst Technol PIT Dept Comp Sci & Engn Kapurthala India KCL Inst Management & Technol Dept Comp Sci & Applicat Jalandhar India

ISBN: (纸本)9781479942367

Wireless sensor network (WSN) is combination of tiny sensors made up with MEMS technology and has important applications such as target tracking and environmental monitoring. In recent times WSNs becomes more attractive because of their sensing ability, low cost, self-organizing nature in different environments. In this paper we have discussed two existing techniques for data communication such as Normal technique and Distance and Density Based Cluster Selection algorithm (DDCSA) and we find that these two techniques are not optimal enough to save energy in a network. In DDCSA protocols there is a problem of cluster breaking and lot of energy is consumed to reforming clusters. In this paper we enhance the Distance and Density Based Cluster Selection Algorithm (DDCSA) using Geographical Forwarding with Face Routing Technique. Simulation Results shows that our Enhanced DDCSA performs better than DDCSA & Normal technique and gives better results in term of Energy spent, Average delay and Packet delivery ratio.

关键词： Geographical forwarding Density Face routing Wireless sensor networks Cluster head Base station (BS) GEODDCSA

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A WSN system architecture to capture context information for beyond 3G communication systems

A WSN system architecture to capture context information for...

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3rd Intelligent sensors, sensor networks and Information Processing conference

作者： Gluhak, Alexander Schott, Wolfgang Univ Surrey Ctr Commun Syst Res Guildford GU2 7XH Surrey England IBM Res GmbH Zurich Res Lab Zurich Switzerland

ISBN: (纸本)9781424415014

To enable new context-aware applications and services in future communication systems, wireless sensor networks (WSNs) are required to capture the context surrounding the service user and service related objects. This paper introduces a novel configurable architecture for a WSN system that is able to deliver context information from the sensors to the user in different application environments, and allows its efficient integration into third generation (3G) mobile communication systems in particular into the IP multimedia subsystem (IMS). The proposed architecture offers significant advantages compared to the ZigBee architecture.

关键词： Wireless sensor networks

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On event signal reconstruction in wireless sensor networks

引用

6th International IFIP-TC6 Networking conference, NETWORKING 2007

作者： Atakan, Barış Akan, Özgür B. Next Generation Wireless Communications Laboratory Department of Electrical and Electronics Engineering Middle East Technical University Ankara06531 Turkey

ISBN: (纸本)9783540726050

In Wireless sensor networks (WSN), the effective detection and reconstruction of the event signal is mainly based on the regulation of sampling and communication parameters used by the sensor nodes. The aim of this paper is to understand the effect of these parameters on the reconstruction performance of event signal in WSN. Theoretical analysis and results show that with proper selection of sampling and communication parameters, the event signal can be satisfactorily reconstructed at the sink. Furthermore, this study also reveals that the non-uniform and irregular sampling of the event signal outperform the uniform sampling in terms of the reconstruction performance while providing significant energy conservation. Moreover, it is also shown that node density is closely related with the quality. © IFIP International Federation for Information Processing 2007.

关键词： Signal reconstruction

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Design and Analysis of a Laser communication link Between an Underwater body and an Air platform

Design and Analysis of a Laser Communication link Between an...

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International conference on next generation Intelligent Systems (ICNGIS)

作者： Sangeetha, R. S. Awasthi, Ram Lochan Santhanakrishnan, T. Govt Model Engn Coll Dept Elect & Commun Engn Thrikkakara PO Kochi 682021 Kerala India Def Res & Dev Org Naval Phys & Oceanog Lab Thrikkakara PO Kochi 682021 Kerala India

ISBN: (纸本)9781509008704

Laser based free space underwater optical communication is useful in a variety of fields. Underwater sensor networks, for example, are a network of sensors or underwater observatories that collect oceanographic data over an interval of time and send them to the outside world periodically for processing. Current methods, such as acoustic communication are limited in bandwidth;the use of cables such as fiber optic is expensive and not practical for autonomous vehicles and radio frequency waves suffer severe attenuation in water. communication between submerged bodies and space platform is another interesting example. In this paper the design and development of an optical communication link based on 635 nm Laser diode and Silicon photo detector has been discussed. The aim of the work is to study experimentally the performance of the communication between an underwater body and a space platform in the laboratory.

关键词： under water sensor network underwater optical channel submarine communication free space optical communication

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Analysis of Radial Basis Function Network for Localization Framework in Wireless sensor networks 5

Analysis of Radial Basis Function Network for Localization F...

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5th International conference on Confluence - The next generation Information Technology Summit (Confluence)

作者： Payal, Ashish Rai, C. S. Reddy, B. V. R. GGS Indraprastha Univ Univ Sch Informat & Commun Technol New Delhi India

ISBN: (纸本)9781479942367

Wireless sensor networks (WSNs) are nowadays extensively preferred for collecting data in the field of disaster management, military operations, habitat monitoring, medical monitoring, and environment monitoring. The location of the sensor which is sending this data is very important for developing efficient routing algorithms, energy efficient communication protocols, and other Quality of services (QoS). Localization is the process by which the sensor motes in the network can identify their own location in the overall network. In this paper, we analyse Radial Basis Function (RBF) Network for developing localization framework in WSNs. RBF based localization framework is to be analysed for faster speed of convergence and low cost of computation. We present analysis of RBF through probabilistic neural network and generalized regression neural network in this paper. The proposed method can be used for designing cost-effective localization framework.

关键词： Localization radial basis network Wireless sensor networks Probabilistic Neural Network Regression neural network

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Reliability evaluation model for multi-states WDM networks

Reliability evaluation model for multi-states WDM networks

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conference on next-generation communication and sensor networks 2006

作者： Fan Hehong Sun Xiaohan Southeast Univ Dept Elect Engn Lab Photon & Opt Commun Nanjing 210096 Jiangsu Peoples R China

ISBN: (纸本)0819464856

With optical networks evolving to the next generation optical networks, various services are intended to be carried over a single optical network infrastructure. This contributes to the phenomenon that different services with different QoS requirements may survive in a set of degradative network working-states. Thus during the study of optical network reliability, it is insufficient to regard optical networks as having only binary working-states according to their network connectivity. We proposes here a new reliability evaluation model for WDM networks, which regard the network as a system having multiple working-states with reference to their route (s-t) capacity and maximum hop number constraints. Additionally, considering that there exist in WDM networks some elements whose failures affect neither the nodes nor the entire links but only certain wavelength channels in the links, a new kind of network element is added to the traditional element types (nodes and links) of network reliability evaluation model, namely wavelength channel related elements. The model was used to simulate the reliability of WC (wavelength continuous), PWC (partial wavelength conversion) and NWC (non-wavelength continuous) WDM networks with CERNET topology by way of Monte-Carlo method. Simulation results indicate that different working-state requirements may lead to different reliability evaluation results, and the differences will enlarge very quickly with the increasing of network element failure rates. This implies that the study of WDM network reliability should be performed under multiple working-states assumption, especially for multi-service networks, and the addition of the new network element kind - a wavelength channel-related element is necessary.

关键词： multiple working-states WDM network network reliability wavelength channel-related elements

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Wireless sensor networks in next generation communication infrastructure: Vision and challenges

Wireless sensor networks in next generation communication in...

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14th International conference on Computational Science and Its Applications, ICCSA 2014

作者： Qaisar, Saad Bin Ali, Salman Felemban, Emad A. School of Electrical Engineering and Computer Science National University of Sciences and Technology Islamabad Pakistan College of Computer and Information System Umm-ul-Qura University Mecca Saudi Arabia

ISBN: (纸本)9783319091464

Last decade saw the development of Wireless sensor networks with multitude of applications built around the sensors. Though most of the issues at protocol and device level remain solved for Wireless sensor networks, there is a growing trend in integration of sensors and sensor based systems with Cyber Physical Systems, Machine-to-Machine and Device-to-Device communication both in infrastructure and ad-hoc modes. The emergence of Cloud Computing, highly intelligent 'Smart' devices and efforts towards 5th generation telecom systems is expected to lead the revolution of a networked world with increased demand for situational awareness leading proliferation of sensors at the edge of physical world. Mounting intelligence built in 'smart' devices, scarcity of frequency spectrum, disruptive technologies and limitations on further reduction in base station size may render base station centric-architecture of today's wireless networks old-fashioned. Due to low data rate bursty nature of sensor data, massive-MIMO antennas, device-centric architectures, smarter devices and native support for Machine-to-Machine and Device-to-Device communication, sensor data originating from these systems and disruptive technologies is expected to grow manifold through passing years. communication and network engineers face an emerging challenge of designing communication and network protocols that can efficiently get integrated with the emerging wireless cellular and computing paradigms. In this paper, we list down these communication and networking challenges and provide our vision for Wireless sensor networks related platforms and enabling technologies of next decade. © 2014 Springer International Publishing.

关键词： next generation networks

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Selecting IoT communication Technologies for Sensing in Agriculture 4

Selecting IoT Communication Technologies for Sensing in Agri...

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4th International conference on Broadband communications for next generation networks and Multimedia Applications (CoBCom)

作者： Biscan, Juraj Has, Mislay Tizec, Krunoslav Kusek, Mario Univ Zagreb Fac Elect Engn & Comp Internet Things Lab Unska 3 HR-10000 Zagreb Croatia

ISBN: (数字)9781665485982

ISBN: (纸本)9781665485982

Currently, the 2G mobile network in the world is shutting down and the existing implementations that used it for sensing should be replaced by new technologies. This paper analyzes new technologies and selects the best IoT (Internet of Things) communication options for creating small and medium networks of sensor devices in different physical environments and communication conditions in the agriculture. The paper analyzes NB-IoT, Cat-M1, LoRaWAN, WiFi, 3G/4G in terms of subscription price, communication capabilities, ease of use, etc. The best configuration is defined for different use cases.

关键词： Internet of Things agriculture LoRaWAN NB-IoT 3G/4G mobile network WiFi Bluetooth

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Performance Comparison of GTS Mechanism enabled IEEE 802.15.4 based Wireless sensor networks using LAR and DYMO protocol 1

Performance Comparison of GTS Mechanism enabled IEEE 802.15....

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2014 International conference on Electronics, communication and Computational Engineering (ICECCE)

作者： Samundiswary, P. Surender, R. Pondicherry Univ Dept Elect Engn Sch Engn & Technol Pondicherry India

ISBN: (纸本)9781479957484

Wireless sensor networks (WSNs) are an emerging field of engineering with various applications. The motivation is due to the low power and small size sensor nodes used in the network. It has started to emerge as the next generation wireless standard for Low-Rate Wireless Personal Area networks (LR-WPAN). The IEEE 802.15.4 standard is adopted as a communication protocol for LR-WPAN which supports low data rate, less power consumption and short transmission distance. IEEE 802.15.4 is the basis for the Zigbee enabled WSNs. IEEE and ZigBee alliance have joined hands to develop a complete specification of protocol stack for 802.15.4. The Guaranteed Time Slot (GTS) mechanism provided by IEEE 802.15.4 standard allocates specific time slots to all nodes in the network and makes communication more consistent. This consistency makes the network to enhance their performance. In this paper, the performance analysis of GTS mechanism enabled IEEE 802.15.4 based wireless sensor networks using various routing protocols is done by using QualNet. Performance metrics such as packet delivery ratio, delay and packets dropped of IEEE 802.15.4 based wireless sensor networks are analysed using Location Aided Routing (LAR) protocol. Then the performance metrics are then compared with that of DYnamic MANET On-Demand (DYMO) routing protocol.

关键词： Wireless sensor Network ZigBee IEEE 802.15.4 standard Guaranteed Time Slot LAR

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