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Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE

17-21 Nov. 2002

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  • GLOBECOM '02 - IEEE Global Telecommunications Conference [front matter]

    Publication Year: 2002, Page(s):i - xliv
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  • Reconfiguration heuristics for logical topologies in wide-area WDM networks

    Publication Year: 2002, Page(s):2701 - 2705 vol.3
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (318 KB) | HTML iconHTML

    We propose several heuristic algorithms that reconfigure logical topologies in wide-area wavelength-routed optical networks. Our reconfiguration algorithms attempt to keep the network availability as much as possible during the reconfiguration process. For this purpose, a lightpath is taken as the minimum unit of reconfiguration, which is an all-optical wavelength-division multiplexed (WDM) channe... View full abstract»

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  • Author index

    Publication Year: 2002, Page(s):3005 - 3014
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  • Symmetric prime-sequence codes for all-optical code-division multiple-access local-area networks

    Publication Year: 2002, Page(s):2061 - 2064 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (318 KB) | HTML iconHTML

    The construction of a new symmetric code for use in all-optical code-division multiple-access (CDMA) local-area networks (LANs) is described. The new code, which is derived from prime-sequence code allows to design fully programmable all-optical encoder and decoder suitable for low-loss, high-capacity, optical CDMA LANs. It is also shown that the number of codewords of the new code is larger than ... View full abstract»

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  • On buffer limited congestion window dynamics and packet loss

    Publication Year: 2002, Page(s):2599 - 2603 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB) | HTML iconHTML

    The central result of this paper is an analytic formula describing the packet loss probability in a buffer as a function of the length of the buffer and the probability of external packet loss. This formula makes it possible to calculate the total loss along a multi-buffer, multi-link route. Also, new types of congestion window distributions are discovered when the packet loss in the buffer is lar... View full abstract»

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  • Asymptotic performance limits for routing and rate allocation in rate-based multi-class networks

    Publication Year: 2002, Page(s):2639 - 2643 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (423 KB) | HTML iconHTML

    We investigate the performance of routing and rate allocation (RRA) algorithms in rate-based multi-class networks, in particular, a network of routers that support the IntServ guaranteed services. We measure the performance of an RRA algorithm in terms of its weighted carried traffic. We derive an upper bound on the weighted carried traffic of any RRA algorithm. The bound can be computed by linear... View full abstract»

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  • Scalable peer finding on the Internet

    Publication Year: 2002, Page(s):2205 - 2209 vol.3
    Cited by:  Papers (5)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (462 KB) | HTML iconHTML

    We consider the problem of finding nearby application peers over the Internet. We define a new peer-finding scheme (called Tiers) that scales to large application peer groups. Tiers creates a hierarchy of the peers, which allows an efficient and scalable solution to this problem. The scheme can be implemented entirely in the application-layer and does not require the deployment of either any addit... View full abstract»

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  • eMeeting: a multimedia application for interactive meeting and seminar

    Publication Year: 2002, Page(s):2994 - 2998 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB) | HTML iconHTML

    We present a client/server-based un-intrusive collaborative multimedia application - called eMeeting - that extracts and archives salient visual information from seminars, while allowing interaction among presenters and the audience in real time. The application uses APIs of the Lotus Sametime® system such as secure login, directory, meeting and multimedia services, to which we have added our ... View full abstract»

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  • Optical communication over the turbulent atmospheric channel using spatial diversity

    Publication Year: 2002, Page(s):2055 - 2060 vol.3
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB) | HTML iconHTML

    Optical communication through clear atmosphere provides a means for high data rate communication (Gbps) over relatively short distances (∼km). However, turbulence in the atmosphere leads to fades of varying depths, some of which may lead to heavy loss of data. We consider spatial diversity at both the transmitter and receiver as a means to mitigate the short-term loss of signal strength. Using... View full abstract»

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  • On reducing the degree of second-order scaling in network traffic

    Publication Year: 2002, Page(s):2594 - 2598 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (421 KB) | HTML iconHTML

    While it is well known that second order scaling in network traffic can lead to larger queueing delays, higher drop rates and extended periods of congestion, reducing the scaling exponents has remained an open problem. In this paper we evaluate some techniques to reduce the degree of scaling in TCP traffic, specifically by reducing two related causes: (1) timeouts and exponential backoffs; and (2)... View full abstract»

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  • Per-flow delay performance in traffic aggregates

    Publication Year: 2002, Page(s):2634 - 2638 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (433 KB) | HTML iconHTML

    Class-based traffic treatment frameworks such as differentiated service (DiffServ) have been proposed to resolve the poor scalability problem in the flow-based approach. Although the performance is differentiated in a class-based basis, the performance seen by individual flows in the same class may differ from that seen by the class and has not been well understood. We investigate this issue by si... View full abstract»

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  • BGP routing: a study at large time scale

    Publication Year: 2002, Page(s):2200 - 2204 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (397 KB) | HTML iconHTML

    We conduct a longterm analysis of BGP routing properties, such as path stability. Our work complements previous studies that examine the BGP routing behavior at smaller time scales, such as its convergence to a routing update. We focus on properties that would reflect the BGP evolution due to growth, policy, and business reasons. We use daily snapshots of a number of BGP tables and we study the ev... View full abstract»

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  • Capturing the complete multifractal characteristics of network traffic

    Publication Year: 2002, Page(s):2355 - 2359 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (425 KB) | HTML iconHTML

    We propose a new multifractal traffic model for network traffic. The model is a combination of a multiplicative cascade with an independent lognormal process. We show that the model has all the important properties observed in data traffic including long-range dependence (LRD), multifractality and lognormality. We also demonstrate that the model is flexible enough to capture the complete multifrac... View full abstract»

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  • Turbo coded diversity system for mobile satellite communications

    Publication Year: 2002, Page(s):2855 - 2859 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (375 KB) | HTML iconHTML

    In this paper, the achievable performance of a turbo coded system adapted to a block fading channel model is evaluated. This model is suitable for analyzing, for instance, frequency-hopped multiple access (FHMA) systems that operate in a mobile satellite environment characterized by frequency-nonselective slow Rician fading, provided that the spacing between carriers is larger than the coherence b... View full abstract»

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  • SIP based services and virtual home UMTS environment in the IST research project "FUTURE"

    Publication Year: 2002, Page(s):2989 - 2993 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (446 KB) | HTML iconHTML

    The integration of a terrestrial UMTS network with a satellite platform represents one of the most attractive proposals to develop a functional Virtual Home UMTS environment for a generic mobile user provided with an "ad-hoc" dual mode terminal, which will be able to exploit the two integrated systems (hereafter referred to as "segments") for a set of innovative multimedia services. At this purpos... View full abstract»

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  • Novel soft-bit demodulator with multidimensional projection for high-order modulation

    Publication Year: 2002, Page(s):2051 - 2054 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (291 KB) | HTML iconHTML

    The demand of higher data rates for wireless applications is unlimited. To provide spectral efficiency and flexible data rate services, the modulation alphabets and channel coding rates can be adapted by link quality control according to the evolutions of 3G standardizations including EDGE and WCDMA. A novel multidimensional projection-based soft-bit demodulator is proposed for high-order modulati... View full abstract»

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  • IrDA IrLAP protocol performance and optimum link layer parameters for maximum throughput

    Publication Year: 2002, Page(s):2270 - 2275 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (437 KB) | HTML iconHTML

    Infrared ports are employed in a wide variety of devices ranging from personal computers and printers to mobile phones. Infrared connectivity complies to specifications defined by Infrared Data Association (IrDA). The performance of IrDA links may be measured at the IrLAP data link layer, which controls the IrDA hardware. A simple equation to calculate throughput from different link parameters is ... View full abstract»

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  • BECN for congestion control in TCP/IP networks: study and comparative evaluation

    Publication Year: 2002, Page(s):2588 - 2593 vol.3
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (473 KB) | HTML iconHTML

    This paper evaluates the suitability of Backward Explicit Congestion Notification (BECN) for IP networks. The BECN mechanism has previously been used in non-IP networks, but there has been limited experimental investigation into the application of the BECN scheme as congestion control mechanism in IP networks. In this paper, we consider an enhanced algorithm for BECN which uses Internet Control Me... View full abstract»

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  • Efficient nonlinear optimizations of queuing systems

    Publication Year: 2002, Page(s):2425 - 2429 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (379 KB) | HTML iconHTML

    We present a systematic treatment of efficient nonlinear optimizations of queuing systems. The suite of formulations uses the computational tool of convex optimization, with fast polynomial time algorithms to obtain the global optimum for these nonlinear problems under various constraints. We first show convexity structures of several queuing systems, including some surprising transition patterns,... View full abstract»

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  • Delay performance of high-speed packet switches with low speedup

    Publication Year: 2002, Page(s):2629 - 2633 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (414 KB) | HTML iconHTML

    The speedup of a switch is the factor by which the switch, and hence the memory used in the switch, runs faster compared to the line rate. In high-speed switches, line rates are already touching the limits at which memory can operate. It is very important for a switch to run at as low a speedup as possible. For an input queued (IQ) switch at speedup 1, 100% throughput can be achieved for any admis... View full abstract»

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  • Broadcast scheduling in information delivery systems

    Publication Year: 2002, Page(s):2935 - 2939 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB) | HTML iconHTML

    Information broadcasting is an effective method to deliver popular information packages to a large number of users in wireless and satellite networks. We address the problem of broadcast scheduling in the pull environment and try to solve this problem by formulating it as a dynamic optimization problem. This approach allows us to find a near-optimal scheduling policy, which we use as a benchmark t... View full abstract»

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  • Topological design of multiple VPNs over MPLS network

    Publication Year: 2002, Page(s):2195 - 2199 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB) | HTML iconHTML

    With the deployment of MPLS over a core IP backbone, it is possible for a service provider to build virtual private networks (VPNs) supporting various classes of services with QoS guarantees. Efficiently mapping the logical layout of multiple VPNs over a service provider network is an important and challenging traffic engineering procedure. The use of sink-tree (multipoint-to-point) routing paths ... View full abstract»

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  • Effective bit selection methods for improving performance of packet classifications on IP routers

    Publication Year: 2002, Page(s):2350 - 2354 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (429 KB) | HTML iconHTML

    In recent years, high-performance routers are needed as well as increasing the link capacity to keep up with the Internet traffic explosion. Routers are preferable to store statistics of the incoming/outgoing traffic to realize the intelligent or policy-based services in the Internet. In this paper, we propose a new packet classification solution, which uses the combination of CAM and DRAM memorie... View full abstract»

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  • Performance of land mobile satellite communication (LMSC) channel with hybrid FEC/ARQ

    Publication Year: 2002, Page(s):2851 - 2854 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (317 KB) | HTML iconHTML

    In this paper, we use Lutz's (1991) model to investigate BER (bit error rate)/PER (packet error rate) performance of the LMSC channel with various FEC (forward error correction) coding as a function of different channel parameters. The problem of insufficient interleaving is studied. Next, hybrid FEC/ARQ techniques are evaluated for different (i.e. open, and rural) channels. We focus on the proble... View full abstract»

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  • Unslotted optical CSMA/CA MAC protocol with fairness control in metro WDM ring networks

    Publication Year: 2002, Page(s):2370 - 2374 vol.3
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (382 KB) | HTML iconHTML

    Optical carrier sense multiple access with collision avoidance (CSMA/CA) is a media access control (MAC) protocol proposed for future metropolitan area wavelength division multiplexing (WDM) ring networks with a fixed receiver and a tunable transmitter at access nodes. In this paper, we focus on the unslotted version of the optical CSMA/CA MAC which is a fully-distributed and asynchronous protocol... View full abstract»

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