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检索条件"任意字段=Conference on Scalability and Traffic Control in IP Networks"

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A novel rate adaptation structure for a scalable differentiated services architecture

A novel rate adaptation structure for a scalable differentia...

引用

IEEE conference and Exhibition on Global Telecommunications (GLOBECOM)

作者： C.C. dos Santos Luan Ling Lee School of Electrical and Computing Engineering-Department of Communications State University of Campinas Campinas Brazil

The need to provide different service levels through the Internet has stimulated the research on differentiated services (DiffServ). This architecture is based on a set of mechanisms, deployed along an aggregated flow path, designed to offer differentiated treatments. Some approaches have appeared with the goal to decrease the implementation complexity of these mechanisms. C. L. Lee et al. have proposed a scalable architecture based on the DiffServ philosophy, where core routers do not need to support any specific function for service differentiation. In our work, we analyze, through simulation, the performance of that architecture regarding disordered packet loss. We also consider a different structure for queueing occupancy control that significantly reduces the rate of packet loss in the core of the domain. Therefore in our approach, the whole DiffServ functionality could efficiently be executed only in the edge routers, including the packet discard control function.

关键词： Diffserv networks Quality of service traffic control Computer architecture Web and internet services ip networks Routing Programmable control Adaptive control scalability

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Adaptive bandwidth management and QoS provisioning in large scale ad hoc networks

Adaptive bandwidth management and QoS provisioning in large ...

引用

MILCOM, Military Communications conference

作者： K. Xu K. Tang Rajive Bagrodia M. Gerla M. Bereschinsky Scalable Network Technologies Inc. USA Computer Science Department UCLA USA Cecom Rdec Stcd

Quality of service provisioning in wireless ad hoc networks plays an integral part in determining the success of network-centric warfare as envisioned in future military operations. It requires good scalability of the QoS architecture since ad hoc networks in the battlefield tend to be large. Previous work attacking QoS in ad hoc networks seldom considers the scalability issues. In this paper, we propose a scalable QoS architecture for such networks. Our scheme draws upon the positive aspects of both IntServ and DiffServ, and extends upon the scalable LANMAR routing protocol to support QoS. The scheme is also capable of incorporating mobile backbone networks (MBNs) to further improve the scalability. Simulation results show that our proposed QoS architecture can achieve good scalability in terms of large network size and mobility.

关键词： Bandwidth Intelligent networks Large-scale systems Ad hoc networks Quality of service Mobile ad hoc networks Routing scalability Communication system traffic control Computer network management

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Congestion control in TCP/ip networks: a combined ECN and BECN approach

Congestion control in TCP/IP networks: a combined ECN and BE...

引用

MILCOM, Military Communications conference

作者： F. Akujobi N. Seddigh B. Nandy R. Makkar I. Lambadaris Department of Systems and Computer Engineering Carleton University Ottawa ONT Canada

In this paper a novel algorithm is proposed which combines the merits of explicit congestion notification (ECN) and backward explicit congestion notification (BECN) mechanisms for congestion control in TCP/ip networks. A comparative performance evaluation of the combined ECN and BECN mechanism is carried out using both long-lived FTP flows and short-lived Web traffic. The simulation results show that the combined ECN+BECN mechanism benefits from BECN's early notification under heavy congestion and ECN's reliable delivery of congestion notification. It is observed that the ECN+BECN mechanism significantly reduces queue fluctuations due to early congestion indication compared to ECN. The loss of BECN Internet control message protocol (ICMP) source quenches on the reverse path does not adversely impact performance due to this combined approach. It is also shown that the ECN+BECN scheme can significantly reduce the ICMP source quench reverse traffic in a network compared to a BECN only network. Experiments with Web traffic workloads show measurable improvement in both average object transfer delay and fairness over ECN.

关键词： Intelligent networks TCPip ip networks Delay Internet Communication system control Transport protocols Computer networks Systems engineering and theory control systems

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A real-time scalable and dynamical test system for MANET

A real-time scalable and dynamical test system for MANET

引用

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： Rui He Man Yuan Jianping Hu Hong Zhang Zhigang kan Jian Ma School of Computing Sicence Beijing Aeronautics and Astronautics University Beijing China CNIC Chinese Academy and Sciences Beijing China Nokia China Research and Development Center Beijing China

ISBN: (纸本)0780378229

In current research on mobile ad-hoc networks, test-beds are always needed. However, real test-beds are costly, and sometimes unfeasible, especially for large-scale mobile ad-hoc networks. Therefore, emulation systems are provided. Unfortunately, exiting emulation systems have obvious defects. They can hardly support scalability or real-time simultaneously, neither adding nor removing mobile node dynamically. In this paper, we propose a test system named ManTS. With distributed architecture and some novel approaches, such as direct transmittal and virtual application traffic, and others. ManTS is able to build test-beds for large-scale mobile ad-hoc networks and guarantee real-time emulation at the same time. Furthermore, ip or upper layer protocols and applications implemented on Linux can run on ManTS without any modification. And with ManTS, simulated mobile nodes can be added into and deleted from mobile ad-hoc networks freely, which is quite useable to test routing and transport protocols. In a word, ManTS is a more flexible test system, and really suitable to test ip and upper layer protocols and applications for large-scale mobile ad-hoc networks.

关键词： Real time systems System testing Mobile ad hoc networks Ad hoc networks Large-scale systems Emulation Protocols scalability Telecommunication traffic traffic control

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Distributed multimedia plays with QoS guarantees over ip

Distributed multimedia plays with QoS guarantees over IP

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International conference on Web Delivering of Music (WEDELMUSIC)

作者： A. Lie L.A. Ronningen Department of Telematics NTNU Trondheim Norway

Musical collaboration over telecommunication networks has marvellous possibilities when it comes to musical education, practise and performance. The deployment and use of high-capacity digital networks makes it possible to obtain end-to-end audio and video latency of 5-20 milliseconds, which is similar to the audio time delay typically experienced between musicians on a stage. The main challenge of reaching this latency budget over digital packet switched network such as the Internet, is how to control the queuing delay of the ip packet experienced at each router on the network paths between each participating musician. Other important aspects are video and audio codec latency, and error resilient tools needed to cope with situations where ip packets arrive too late or have been lost in the network. We give an overview of resent research (work-in-progress) in this field, including network simulations, conducted at the NTNU, and suggest how these techniques can be utilized under live concert performances.

关键词： Propagation delay ip networks Quality of service Codecs Bandwidth Telecommunication traffic traffic control Decoding Collaboration Diffserv networks

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Real-time ip network simulation at gigabit data rates

Real-time IP network simulation at gigabit data rates

引用

International conference on Telecommunications (ConTEL)

作者： M. Zee M. Mikuc University of Zagreb Faculty of Electrical Engineering and Computing University of Zagreb Croatia

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Bandwidth control for wireless access networks

Bandwidth control for wireless access networks

引用

International conference on Neural networks and Signal Processing

作者： Ke Lin Ai-Qun Hu DSP Laboratory Radio Department South-East University Nanjing Jiangsu China

ISBN: (纸本)0780377028

This paper provides a reference way to realize bandwidth control, a basic and important part of QoS, in WLAN. Using iptables and TC (traffic control) of Linux, AC (Access control, the boundary node of a mini WLAN) controls all packets pass by. Packets can be dropped, be deferred or be delivered at once. Then, AC can control any user's bandwidth according to his ip address, MAC address, user name and so on. Besides that, it can set a user's priority with similar ways and a user with high priority will be served preferentially. At the end of this paper, we will talk about some possible improvement.

关键词： Bandwidth Wireless networks Wireless LAN Telecommunication traffic Quality of service Communication system traffic control Asynchronous transfer mode Intserv networks Local area networks Digital signal processing

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Scalable MPLS multicast using label aggregation in Internet broadcasting systems

Scalable MPLS multicast using label aggregation in Internet ...

引用

International conference on Telecommunications (ICT)

作者： Young-Kyu Oh Dong-Keun Kim Hun-Je Yoen Mi-sun Do Jaiyong Lee Department of Electrical & Electronic Engineering Yonsei University Seoul South Korea

In previous years, the Internet using a conventional ip mechanism had a lot of problems such as slow packet forwarding, complex routing and inefficient usage of network resources. Multi-Protocol Label Switching (MPLS) is one of the mechanisms that are proposed to solve these problems. In addition, multicast is one of the big issues in the Internet society because it can efficiently support real-time multimedia traffic. Therefore, the next generation Internet will be a system which have an MPLS backbone and can support multicast. An MPLS multicast mechanism is considered under Internet broadcasting systems. Specially, the scalability problem of common problems in MPLS and multicast is solved using label aggregation. In the proposed algorithm, the Label Edge Router (LER) of edge router in MPLS has a new table containing information of each tree node. The table is called the multicast Tree Node Table. Extending the Constraint-based Routed Label Distribution Protocol (CR-LDP), the label allocation is performed by using this table. The scalability problem can be solved using this algorithm because it reduces label consumption. So, the MPLS multicast mechanism can be easily supported in a large Internet backbone network.

关键词： Multiprotocol label switching Internet Broadcasting ip networks Spine scalability Multicast algorithms Routing Telecommunication traffic Multimedia communication

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Different behavioral characteristics of Web traffic between wireless and wire ip network

引用

International conference on Communication Technology (ICCT)

作者： Chunmei Zhu Yu Wang Yan Zhang Weiling Wu College of Information Engineering Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)7563506861

Web service has become the largest consumer of Internet resources and is a promising 3G wireless service. Constructing an accurate model of Web traffic is essential for networking experiments involving end-to-end performance. In this paper, we employ an approach of analyzing TCP/ip header to obtain Web traffic model. By comparing Web traffic of wireless and wire network, we present some different characteristics between them that reflect the influences of wireless limited bandwidth and high tariff. Furthermore, Hurst parameter shows that the self-similar nature of wireless Web traffic still exists.

关键词： Telecommunication traffic Wire ip networks traffic control TCPip Communication system traffic control Educational institutions Web and internet services Bandwidth Ground penetrating radar

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ip traffic transmission over the general packet radio services

IP traffic transmission over the general packet radio servic...

引用

International conference on Communication Technology (ICCT)

作者： J.H. Sarker Information Technology Department Espoo-Vantaa Institute of Technology Espoo Finland

One ip terminal can occupy a multiple number of slots within time frames in the GPRS networks. A limited number of radio resources (slots) are allocated in a base station for such ip terminals. If one ip terminal can occupy only one slot discontinuously in a time frame, for a real time packet transmission, the number of accepted calls is obtained by dividing the number of radio resources during that time by the maximum allowed number of ip calls. The real time ip traffic flow over the GSM-GPRS network is discussed in [J.H. Sarker and S.J. Halme, 2002]. An analysis for the non-real time bursty ip packet transmission over the GPRS air interface that measures the channel efficiency and the probability that a packet is forced for queuing and the header/payload ratio are executed in this paper. Results show that the channel efficiency as well as the probability that a packet is forced for queuing increases with increasing call intensity, maximum number of admitted ip calls and the burstiness factor. The channel utilization decreases with the increase of header/payload ratio.

关键词： Packet radio networks Telecommunication traffic traffic control Ground penetrating radar Payloads Resource management Base stations Force measurement Time measurement Queueing analysis

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