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

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Service broker for next generation networks

Service broker for next generation networks

引用

9th International conference of Feature Interactions in Software and communication Systems, ICFI 2007

作者： Lin, Fuchun Joseph Cheng, Kong Eng Telcordia Technologies 1 Telcordia Drive Piscataway NJ 08854 United States

ISBN: (纸本)9781586038458

This paper describes the emerging need of feature interaction managers in next generation networks that are based on a convergent IP architecture to support voice, data, and multimedia services. Though this need has been addressed by the telecom industry with various architectural components under different names such as Service Capability Interaction Manager (SCIM) in the 3GPP (3rd generation Partnership Project) IP Multimedia Subsystem (IMS), the consensus of the industry is to call such a network function Service Brokering and the network component fulfilling this function Service Broker. This paper reports the current industrial status in architecting the Service Broker, discusses the limits of the Service Brokering functions defined in 3GPP, and points out open issues for further research. © 2008 The authors and IOS Press.

关键词： next generation networks

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Possibility of sensor Network Applying for Railway Signal System

Possibility of Sensor Network Applying for Railway Signal Sy...

引用

5th International conference on Networked Sensing Systems

作者： Fukuta, Yamato E Japan Railway Co Mito Branch Off Mito Ibaraki Japan

ISBN: (纸本)9784907764319

sensor technologies have significant roles for train operations, many sensors have been developed and installed. At present, performances of these sensors are high enough to ensure safety operations of trains, but not enough to maintain the stable work of signal devices. Therefore, advanced sensor system is expected. For example, a wireless communication system is desired because it has Small influence to present systems. sensor network is one promising solution. Its function of multi-hop transmitting easily realizes wireless networks. Implanting several sensor devices in a railroad crosstie and setting the crossties under rails, the sensor network automatically form a communication path along the rail, where the resolution of sensing is around a meter and the path is flexible to reform. In addition, the MEMS technology will have large contribution to realize small but high performance sensor devices with low cost. By using such intelligent sensor devices, sensor network will realize the next generation of railroad control system.

关键词： sensor network railway train operation sensor device signal system multi-hop wireless transmission ad-hoc flexible network

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Enabling resource-awareness for in-network data processing in wireless sensor networks

Enabling resource-awareness for in-network data processing i...

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19th Australasian Database conference, ADC 2008

作者： Röhm, Uwe Gaber, Mohamed Medhat Tse, Quincy University of Sydney School of Information Technologies Sydney NSW 2006 Australia CSIRO ICT Centre Hobart TAS Australia

The next-generation of wireless sensor platforms allows for more advanced in-network data processing. The central challenge remains energy and communication efficiency. This paper presents a resourceawareness framework for wireless sensor networks that allows in-network data processing to adapt to changing resource levels such as battery power or available memory. We have implemented the proposed framework as part of a query processing system for the Sun SPOT sensor network platform. As a case study, we have applied the framework to the query processor's on-line data clustering algorithm, making it resource-aware. In an experimental study, we demonstrate how communication costs can be signi ficantly reduced by de-coupling clustering and data communication. The results also show the effectiveness of the resource-aware clustering algorithm: It can keep a constant memory footprint for only a marginal acceptable error in result accuracy. © 2008, Australian Computer Society, Inc.

关键词： Wireless sensor networks

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Artificial Immune-based Feature Interaction Detection and resolution for next generation networks

Artificial Immune-based Feature Interaction Detection and re...

引用

9th International conference of Feature Interactions in Software and communication Systems, ICFI 2007

作者： Liu, Hua Liu, Zhihan Yang, Fangchun Zhang, Jianyin State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications No. 10 Xitucheng Rd Haidian District Beijing China

ISBN: (纸本)9781586038458

Feature interaction is a major obstacle for the rapid development of new services in telecommunication networks. Based on the similarities between Artificial Immune System and Feature Interaction Management System, an Artificial Immune-based Feature Interaction Management System (AIFIMS) is proposed for the online FI detection and resolution in next generation networks (NGN). AIFIMS consists of three modules: Artificial Immune-based Detection (AID) module, Artificial Immune-based Resolution (AIR) module and Management module. By introducing and exploiting some AIS mechanisms such as multi-protection mechanism, Antigen Recognition, clonal selection, immune learning and so on, AID module can effectively detect FIs in a universal way, and new kinds of FIs can be gradually recognized and memorized also. AIR module resolves the detected FIs fexibly through simulating Antigen Cleanup mechanism. With the experimental verification, AIFIMS is effective to provide a unified framework for detecting and resolving FIs among ever-changing NGN services. © 2008 The authors and IOS Press.

关键词： next generation networks

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Channel allocation for multiple channels multiple interfaces communication in wireless ad hoc networks

Channel allocation for multiple channels multiple interfaces...

引用

7th International IFIP-TC6 Networking conference

作者： Luong, Trung-Tuan Lee, Bu-Sung Yeo, C. K. Nanyang Technol Univ Sch Comp Engn Singapore 639798 Singapore

ISBN: (纸本)9783540795483

A major drawback of multi-hop communication in ad hoc network is the bandwidth scarcity along the forwarding path of data packet. The main reason for the lack of bandwidth or the exponential reduction in the bandwidth is the contention for bandwidth between nodes along the path. In this paper we will demonstrate one way to overcome this problem through the use of multiple channels multiple interfaces (MCMI). We investigate different forwarding channel selection schemes for MCMI communication with Destination Sequenced Distance Vector protocol: same channel, random and round robin. Based on our analysis and simulation results we have shown that MCMI protocol significantly improves the channel capacity while maintaining low end-to-end delay. Forwarding channel selection policies play an important role in determining the performance of the MCMI. Among the channel assignment policies under study, round robin policy provides the best performance. The results provide a baseline for evaluating bandwidth of multiple channels multiple interfaces networks.

关键词： multiple channel communication channel interference channel assignment bandwidth

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DBR: Depth-based routing for underwater sensor networks

DBR: Depth-based routing for underwater sensor networks

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7th International IFIP-TC6 Networking conference

作者： Yan, Hai Shi, Zhijie Jerry Cui, Jun-Hong Univ Connecticut Dept Comp Sci & Engn Storrs CT 06269 USA

ISBN: (纸本)9783540795483

Providing scalable and efficient routing services in underwater sensor networks (UWSNs) is very challenging due to the unique characteristics of UWSNs. Firstly, UWSNs often employ acoustic channels for communications because radio signals do not work well in water. Compared with radio-frequency channels, acoustic channels feature much lower bandwidths and several orders of magnitudes longer propagation delays. Secondly, UWSNs usually have very dynamic topology as sensors move passively with water currents. Some routing protocols have been proposed to address the challenging problem in UWSNs. However, most of them assume that the full-dimensional location information of all sensor nodes in a network is known in prior through a localization process, which is yet another challenging issue to be solved in UWSNs. In this paper, we propose a depth-based routing (DBR) protocol. DBR does not require full-dimensional location information of sensor nodes. Instead, it needs only local depth information, which can be easily obtained with an inexpensive depth sensor that can be equipped in every underwater sensor node. A key advantage of our protocol is that it can handle network dynamics efficiently without the assistance of a localization service. Moreover, our routing protocol can take advantage of a multiple-sink underwater sensor network architecture without introducing extra cost. We conduct extensive simulations. The results show that DBR can achieve very high packet delivery ratios (at least 95%) for dense networks with only small communication cost.

关键词： sensor nodes

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Bayesian sensor model for indoor localization in Ubiquitous sensor Network

Bayesian sensor model for indoor localization in Ubiquitous ...

引用

1st ITU-T Kaleidoscope Academic conference Innovations in NGN

作者： Bekkali, Abdelmoula Matsumoto, Mitsuji Waseda Univ Grad Sch Global Informat & Telecommun Studies Shinjuku Ku Tokyo Japan

ISBN: (纸本)9789261124410

Ubiquitous sensor networks (USN) technology is one of the essential key for driving the next generation Network (NGN) to realize secure and easy access,from. anyone, any thing, anywhere and anytime. The location information is one of the most important and frequently-used contexts in ubiquitous networking. However, a system can use the changes of location to adapt its behavior such. as computation and communication, without the user intervention. In this paper we introduce a Bayesian sensor framework for solving the location estimation errors problem, in Radio Frequency identification (RFID) environments. In our model the physical properties of the signal propagation are not taken into account directly. Instead, the location estimation is regarded as machine learning problem in which the task is to model how the location estimation error is distributed indoors based on a sample of measurements collected at several known locations and stored in RFID tags. Results obtained by simulations demonstrate the suitability of the proposed model to provide high performance level in terms of accuracy and scalability.

关键词： indoor location estimation USN RFID NGN Bayesian filtering

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On Cache Invalidation for Internet-based Vehicular Ad Hoc networks

On Cache Invalidation for Internet-based Vehicular Ad Hoc Ne...

引用

5th IEEE International conference on Mobile Ad-Hoc and sensor Systems

作者： Lim, Sunho Chae, Soo Hoan Yu, Chansu Das, Chita R. S Dakota State Univ Dept Elect Engn & Comp Sci Brookings SD 57007 USA Korea Aerosp Univ Sch Avoion Informat Telecommun Geonggido South Korea Cleveland State Univ Dept Elect & Comp Engn Cleveland OH 44115 USA Penn State Univ Dept Comp Sci & Engn University Pk PA 16802 USA

ISBN: (纸本)9781424425747

Internet-based vehicular ad hoc network (IVANET) is an emerging technique that combines a wired Internet and a vehicular ad hoc network (VANET)for developing a next generation of ubiquitous communication infrastructure and improving universal information and service accessibility A key optimization technique in IVANETs is to cache frequently accessed data items in a local storage of vehicles. Since vehicles are not critically limited by the storage space, it is a less of a problem which data items to cache. Rather a critical design issue is how to invalidate them when data items are updated. This is particularly a concern due to vehicles' high-speed mobility In this paper, we propose a novel cache invalidation algorithm that takes advantage of the underlying location management scheme to reduce the number of broadcast operations and the corresponding query delay. Numerical results indicate that the proposed scheme significantly reduces the communication cost, and thus is proven to be a viable solution for IVANETs.

关键词： Internet-based vehicular ad hoc network cache invalidation mobile IP

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2007 Australasian Telecommunication networks and Applications conference, ATNAC

2007 Australasian Telecommunication Networks and Application...

引用

2007 Australasian Telecommunication networks and Applications conference, ATNAC 2007

ISBN: (纸本)1424415578

The proceedings contain 91 papers. The topics discussed include: a test methodology for PSTN emulation and simulation services over next generation networks;SNR estimation of SS communication using orthogonal code for fading channels;code tracking loop for M-ary/SS systems using outputs gating of correlators;a distributed time-fair scheduling algorithm for multi-rate WLANs;joint network and channel coding for cooperative networks;a survey on OFDM PAPR reduction techniques for 60 GHz wireless CMOS radio;angle of arrival extended S-V model for the 60 GHz wireless indoor channel;on the characteristics of BGP multiple origin AS conflicts;a fast loss recovery scheme for IP multicast services;analysis of an ad hoc network with autonomously moving nodes;mobile embedded database for remote process management system;and RFID-based real-time smart waste management system.

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Multi-player VR game built upon wireless sensor network 08

Multi-player VR game built upon wireless sensor network

引用

Proceedings of the 2nd international conference on Ubiquitous information management and communication

作者： Jee, Hyunho Eom, Doo-Seop Kim, Taeyoung Park, Hunki Lee, Hyoil Han, Junghyun Game Research Center College of Information and Communications Korea University Seoul Korea Republic of School of Electrical Engineering Korea University Seoul Korea Republic of

ISBN: (纸本)9781595939937

This paper presents a multi-player VR game platform, which uses a motion-tracking system with wireless sensor network (WSN). We use transmitters/receivers of ultrasound and RF signals, and acceleration sensors. Multiple users play the VR game with physical devices in the real world, and the poses of the corresponding virtual devices of the game world are computed and reflected based on the information such as positions, orientations, and velocities of the physical devices. The implementation shows a new type of natural interface for the next-generation VR games which can be well integrated with WSN. © 2008 ACM.

关键词： Wireless sensor networks

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