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检索条件"任意字段=Conference on Performance and Control of Next-Generation Communications Networks"

共 6354 条记录，以下是4981-4990 订阅

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Energy consumption control for large scale sensor networks using Partition Energy Balanced Adaptive Clustering Hierarchy scheme

Energy consumption control for large scale sensor networks u...

引用

IEEE International conference on Robotics and Biomimetics (ROBIO 2006)

作者： Wang, Yi Zhang, Deyun Ma, Xinxin Xi An Jiao Tong Univ Sch Elect & Informat Engn Xian 710049 Shaanxi Peoples R China

ISBN: (纸本)9781424405701

Segmentation of wireless sensor networks into clusters is a promising approach for efficient utilization and distribution of the limited energy resources within the deployed sensor nodes. In actual implementations, however, there are potential drawbacks that the unbalanced energy assignment and node's physical communication range limitation may restrict the node's operation, and in turn affect the performance of the entire network. In this paper, we propose a novel clustering algorithm named Partition Energy Balanced Adaptive Clustering Hierarchy (PEBACH), which is specially tailored for periodical data gathering applications. For this approach, the cluster heads of each partition of the network are elected based on the residual energy and their relative distance to the region of interest. Such a scheme overcomes the unbalanced energy assignment and node's physical communication range limitation discussed in previous work. Simulation results show that PEBACH outperforms other protocols significantly in prolonging the network lifetime, enlarging the node number, and simultaneously maintains the normal communication range for the nodes.

关键词： wireless sensor networks clustering energy efficiency network lifetime

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HUHG: High Utilization and Hybrid Granting algorithm for EPON

HUHG: High Utilization and Hybrid Granting algorithm for EPO...

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Advanced International conference on Telecommunications andInternational conference on Internet and Web Applications and Services, AICT/ICIW'06

作者： Kim, Jun-Seog Yeon, Hun-Je Kim, Seog-Gyu Lee, Jaiyong Department of Electrical and Electronic Engineering Yonsei University Seoul Korea Republic of

ISBN: (纸本)0769525229

The In recent year, EPON (Ethernet PON) system is expected to be more efficient solutions for High speed, broadband access networks in next generation access network due to the convergence of low-cost Ethernet equipment and low-cost fiber infrastructure. However, upstream channel control algorithm is essential to share upstream bandwidth in EPON. Therefore, many studies about EPONs are interested in the problems of efficient bandwidth utilization and supporting QoS (Quality of Service). In this paper, we suggest HUHG (High Utilization and Hybrid Granting) algorithm of supporting high bandwidth utilization and QoS for different service classes. This algorithm improves bandwidth utilization as diminishing or removing idle time of upstream channel scheduling using characteristics of fixed EF (Expedited Forwarding) cycle. This algorithm also minimizes the packet delay and delay jitter of EF service class. We conduct detailed simulation experiments using OPNET to study the performance and validate the effectiveness of the proposed algorithm. © 2006 IEEE.

关键词： Broadband networks

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performance analysis and enhancement of the next generation cellular networks 06

Performance analysis and enhancement of the next generation ...

引用

WoWMoM 2006: 2006 International Symposium on a World of Wireless, Mobile and Multimedia networks

作者： Yu, Xiang Qiao, Chunming Wang, Xin Xu, Dahai Department of Computer Science Frostburg State University Department of Computer Science and Engineering State University of New York Buffalo Department of Electrical Engineering State University of New York Stony Brook Department of Electrical Engineering Princeton University

ISBN: (纸本)0769525938

As more and more wireless subscribers access the Internet through cellular networks, Internet data traffic, which is known to be long range dependent (LRD), will soon dominate the conventional voice traffic. In this paper, we study the impact of such LRD data traffic on the statistical characteristics of Multi-Access Interference (MAI) and Signal to Interference-Plus-Noise Ratio (SINR) in a Code Division Multiple Access (CDMA) network. Through analysis and simulation, we show that the time-scaled MAI and SINR have slow decaying tail distributions due to the LRD data traffic. As a result, the outage probability is larger for data users than that for voice users. To improve the performance of the CDMA network in the presence of LRD data traffic, we propose a variable period prediction scheme to predict MAI or the equivalent number of active users. We show that the proposed variable period prediction is not only more accurate for data users but also less memory-consuming than existing fixed period prediction. In addition, rate control based on variable period prediction can achieve lower outage probability and higher throughput for data users than that based on fixed period prediction. © 2006 IEEE.

关键词： Computer networks

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APOHN: subnetwork layering to improve TCP performance over heterogeneous paths

APOHN: subnetwork layering to improve TCP performance over h...

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conference on next generation Internet networks, NGI

作者： D. Kliazovich F. Granelli G. Pau M. Gerla University of Trento Trento Italy Computer Science Department UCLA CA USA

This paper proposes a novel architecture, named APOHN, designed for data communications over heterogeneous networks. APOHN enables easy implementation of various existing and upcoming performance optimization solutions with the main objective to keep the standardized TCP/IP reference model untouched. APOHN architecture extends ISO/OSI protocol stack model with an additional layer designed for subnetwork communications and optimized with specific physical subnetwork characteristics in mind. TCP/IP flow speedup, subnetwork flow multiplexing and optimized subnetwork communications result in great performance improvements in heterogeneous networks. Moreover, the support of IPsec enables secure communications. APOHN performance is evaluated through simulations using a combined satellite and WLAN network scenario-commonly used in disaster recovery as well as in a variety of military applications. APOHN constitutes an architectural solution competitive with leading architectures such as performance enhancement proxies (PEP) as well as delay-tolerant networking (DTN)

关键词： TCPIP Protocols Wireless networks Electronic mail Computer science Data communication Disruption tolerant networking IP networks Propagation delay Error analysis

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performance Analysis of Contention Based Medium Access control Protocols

Performance Analysis of Contention Based Medium Access Contr...

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IEEE Annual Joint conference: INFOCOM, IEEE Computer and communications Societies

作者： G. Sharma A. Ganesh P. Key School of Electrical and Computer Engineering Purdue University West Lafayette IN USA Microsoft Research Cambridge UK

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Routing and Mobility Strategies for Mobile Ad Hoc networks

Routing and Mobility Strategies for Mobile Ad Hoc Networks

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作者： Mohammed Husein Alchaita De Montfort University

学位级别：博士

Mobile Ad hoc networks (MANET) are envisioned to become key components in the architecture of the next generation network. In contrast to wired and cellular networks, a MANET is an infrastructureless network that does not depend on any established infrastructure or centralised administration such as a base station. It is an autonomous system of wireless mobile nodes that move freely, randomly and organise themselves arbitrarily. Therefore, the network topology of an ad hoc network is dynamic in nature and may change rapidly and in unpredicted manner. Hence, the intercommunications among nodes are changing continuously. Generally, communication between a source node and a destination node in MANETs are established through multiple intermediate nodes. As a result, any link breaks between any two directly communicating nodes of the established path will result in a break of the complete connection between the source and the destination nodes. In addition, the mobility of nodes results in route loss, poor longevity of established routes, asymmetric communications links, increase in the control traffic overhead and affects the performance of the routing protocol. Moreover, using a number of routing parameters for routing such as geographical location, speed, and signal strength requires a number of resources to provide these parameters. These resources are unlikely to be always available at the same time. The aim of this research is to develop three new routing approaches for mobile ad hoc networks within the context of the previously described situations. One objective of developing these approaches is to study the behaviour of a routing protocol when only the "self-dependent" parameter exists for routing information. Other information is absent in the network, such as location information, speed, etc. Another objective is to exploit the mobility of nodes to establish long-lived routes by using the heading direction information of mobile hosts. As third objective, the s

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An Ant-Assisted Path-Flow Routing Algorithm for Telecommunication networks

An Ant-Assisted Path-Flow Routing Algorithm for Telecommunic...

引用

Asia-Pacific conference on communications

作者： Heesang Lee Gyuwoong Choi Kug-chang Kang Soonseok Lee Youngsun Kim Department of Systems Management Engineering Sungkyunkwan University South Korea Electronics and Telecommunications Research Institute South Korea

ISBN: (纸本)1424405734

For the integrated and QoS (quality of services) aware requests, a routing in the backbone network of the next generation telecommunication networks seems to be a path-flow based and centralized routing. In this paper we suggest a path-flow routing algorithm for the network that is assisted by ant colony behavior. In this algorithm ants monitor traffic of each path-flow in a given network, which can be changed dynamically. We use ants' pheromone to monitor and record the network status to avoid delay and packet loss of the traffic. We use the ants for this monitoring and reporting function of the network using stigmergy of the ant colony. A routing decision for the updated traffic is made by solving a mathematical programming formulation and an exact algorithm that was proposed in our previous work. We analyze the performance of our routing framework through simulation in various network instances. From this simulation we can conclude that our ant-assisted multi-commodity minimization algorithm shows some promising performance for the path-flow telecommunication networks

关键词： Routing Monitoring Telecommunication traffic Quality of service Spine next generation networking Traffic control Mathematical programming performance analysis Analytical models

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performance Monitoring in the next generation of Optical networks

Performance Monitoring in the Next Generation of Optical Net...

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International conference on Photonics in Switching (PS)

作者： Martin Nordal Petersen COMDTU Department of Communications Optics and Materials Technical University of Denmark Kongens Lyngby Denmark

This paper discusses the requirements for optical performance monitoring in all-optical networks. Investigations show that current monitoring technologies are not sufficient for the optically switched networks and that several performance monitoring operations need to be moved down to the physical layer. Furthermore, three experimental examples of optical performance monitoring are presented; dispersion monitoring, OSNR monitoring and all-optical parity checking.

关键词： next generation networking Optical fiber networks Condition monitoring Physical layer All-optical networks Optical fiber dispersion Optical fiber communication Communication switching Quality of service Routing

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On The Vertical Handoff performance for Interworking between Microcellular and Macrocellular networks

On The Vertical Handoff Performance for Interworking between...

引用

International conference on Wireless and Mobile communications (ICWMS 2006)

作者： Muhammed Salamah Fatma Tansu Department of Computer Engineering Eastern Mediterranean University Turkey

The next generation wireless network environments are expected to support anywhere, anytime connectivity for high-performance applications like multimedia, full-motion video and high data rates with appropriate quality of service (QoS). To provide a solution to these demanding needs, service providers intend to combine different technologies in heterogeneous networks. In this study, upward and downward vertical handoff performance is studied on interworking between microcellular and macrocellular networks. We primarily proposed an efficient strategy for the execution of vertical handoff decision with the aim of maximizing the QoS experienced by the user. In the proposed strategy, we concentrated on crucial features like user preference and support of different service types. Simulation results on the key parameters such as Grade of Service (GoS), throughput and resource utilization prove that the proposed strategy can provide powerful support for QoS in heterogeneous networks.

关键词： Wireless networks Quality of service Wireless LAN GSM Delay Telecommunication traffic next generation networking Bandwidth Satellites Cellular networks

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Combined Preemption and Adaptation in next generation Multiservice networks

Combined Preemption and Adaptation in Next Generation Multis...

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IEEE International conference on communications (ICC)

作者： Steven Weber Jaudelice C. De Oliveira Sukrit Dasgupta Bryan Willman Zhen Zhao Department of ECE Drexel University Philadelphia PA USA

Preemption and adaptation are two common techniques for controlling inelastic traffic such as streaming media. Adaptation policies dynamically increase or decrease the transmission rate of the stream in response to the presence or absence of network congestion. On the other hand, preemption policies select streams to be removed from the congested route. The removed streams may be rerouted through less favorable paths in the network. Adaptation causes a "virtual increase in network capacity" at the cost of reducing the client perceived stream quality (since rate reduction is achieved through lossy compression). Preemption permits improved blocking probabilities and traffic alignment on shortest paths for high priority traffic at the expense of performance degradation for low priority traffic. In this paper, we demonstrate the aforementioned performance trade-offs and the increased efficacy of control achievable through the combined use of preemption and adaptation policies.

关键词： next generation networking Streaming media Bandwidth Communication system traffic control Network topology Costs Subscriptions Degradation Encoding Equations

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