By Topic

Communication Technology Proceedings, 2000. WCC - ICCT 2000. International Conference on

Date 21-25 Aug. 2000

Go

Filter Results

Displaying Results 1 - 25 of 152
  • 2000 International Conference on Communication Technology Proceedings [front matter]

    Publication Year: 2000, Page(s):0_1 - 27
    Request permission for commercial reuse | PDF file iconPDF (1138 KB)
    Freely Available from IEEE
  • Practical traffic grooming scheme for single-hub SONET/WDM rings

    Publication Year: 2000, Page(s):1193 - 1200 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (730 KB)

    In SONET/WDM networks, one fiber supports multiple wavelengths and each wavelength supports several low rate tributary streams. "Traffic grooming" then is defined as properly using a SONET add/drop multiplexer (ADM) to electronically multiplex and demultiplex the required tributary traffic patterns with minimal resource cost (wavelengths and ADMs). This paper studies the traffic grooming problem i... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Author index

    Publication Year: 2000, Page(s):1 - 8
    Request permission for commercial reuse | PDF file iconPDF (455 KB)
    Freely Available from IEEE
  • An efficient delay-constrained multicast routing algorithm

    Publication Year: 2000, Page(s):1244 - 1247 vol.2
    Cited by:  Papers (1)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    We propose a simple multicast routing heuristic for delay-sensitive applications. The running complexity of it is O(m|V), where m is the number of group members and |V is the number of nodes in the network. Experimental results through simulations show that the DCMA achieves good performance View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multicast distribution for multimedia on demand services

    Publication Year: 2000, Page(s):1236 - 1243 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    Recent advances in information and communication technologies have made multimedia on demand services technically and economically feasible. An important aspect of such systems is the resource sharing technique, which allows the simultaneous service of a large number of users with considerable savings in terms of network bandwidth and server resources. In this paper, we report the results of a stu... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An automatic translation from textual E-LOTOS into graphic E-LOTOS

    Publication Year: 2000, Page(s):1232 - 1235 vol.2
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    Conformance testing involves checking the correctness of protocol implementations according to the protocol specification in the computer communication network. To give the protocol specification clearly and exactly, “formal description techniques” must be used in describing the protocol. LOTOS (Language of Temporal Ordering Specification) is one of them. E-LOTOS is an enhancement to s... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Dilution of position in the Doppler-range satellite positioning algorithm

    Publication Year: 2000, Page(s):1141 - 1144 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    Depending on different types of users, several algorithms, one of which combines Doppler and range measurements for positioning computation and which is called the D-R algorithm, can be used in software design in a satellite positioning system. The D-R algorithm can be selected for a stationary user in certain circumstance where only few satellites can be tracked simultaneously due to shielding. T... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Communicating in electronic white board

    Publication Year: 2000, Page(s):1228 - 1231 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    Electronic white board (EWB) is a network-based multimedia application. It allows distributed users to share a public drawing space called white board. Evidently, communication can be described as the foundation of the EWB system. A good communicating mechanism can improve the performance greatly. This paper provides some solutions, which include network architecture, network topology, communicati... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reliable multicast file transfer on the inter-university satellite network

    Publication Year: 2000, Page(s):1137 - 1140 vol.2
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    We developed a reliable multicast program module to transfer files efficiently on the inter-university satellite network which is called SCS (Space Collaboration System). SCS consists of 139 VSAT (very small aperture terminal) stations at universities and has been used for sharing classes, debates, and symposiums at distant places, exchanging audiovisual signals. To provide data sharing services, ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A modular environment for modelling and simulating multimedia conferencing over interconnected networks

    Publication Year: 2000, Page(s):1220 - 1227 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    To carry out a realistic simulation of multimedia communications, it is necessary for a simulation environment to be able to model a number of traffic conditions for different media streams, and to support a variety of network systems operating in a set of interconnected networks. In this paper, we describe a modular environment, called M5, for modelling, simulating and analysing multimedia confer... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Bit-error-rate performance dependence on pump and signal power of the wavelength converter based on FWM in semiconductor optical amplifiers

    Publication Year: 2000, Page(s):1557 - 1560 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    We demonstrate the effect of input pump and signal power on the converted optical signal-to-noise ratio (OSNR), intersymbol interference (ISI) and bit-error-rate (BER) performance of the wavelength converter based on four-wave mixing (FWM) in semiconductor optical amplifiers (SOA). The results of BER measurement show that there exists a trade-off between maximizing signal-to-background ratio (SBR)... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The MEO satellite mobile communication system

    Publication Year: 2000, Page(s):1133 - 1136 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    This paper presents a summary description of a newly proposed satellite mobile communication system. The features of the system are: (1) it will utilize a special 5-MEO equatorial satellite constellation; (2) it will be equipped with so-called staring antennas, the footprint of which is relatively fixed in the same serving area while the satellite is moving; (3) it will utilize general small-satel... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimum design of videoconferencing systems over ATM networks

    Publication Year: 2000, Page(s):1213 - 1219 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    Information infrastructures have been deployed which allow videoconferencing systems to be applied in tele-learning. In this paper, simplified dimensioning methods are proposed for CBR (constant bit rate) and VBR (variable bit rate) schemes in an ATM system. In the light of the dimensioning methods, the optimum video bit rate is analyzed considering utility and economic aspects such as (for exampl... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance, improvement and perspective application of an all-optical shift register

    Publication Year: 2000, Page(s):1554 - 1556 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    An all-optical shift register based on self electro-optic effect devices is introduced. The switching behavior, system performance and some possible improvements are presented, Calculations show the system bit rate could be up to 790 Mbit/s with 1 mW clock power. An improved scheme is discussed, which can provide 2 Gbit/s throughput for 1 mW clock power. Finally we present an application of this a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A software framework for software radio

    Publication Year: 2000, Page(s):1102 - 1105 vol.2
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    We propose a software framework for the third-generation wireless communication systems. This framework is based on CORBA that is a distributed object-oriented standard. The third-generation wireless communication equipment can execute its processes on CORBA's ORB. We also define a basic bearer service (BBS) using CORBA IDL. Based on this BBS, the handheld can dynamically change software modules o... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A randomized QoS routing algorithm on networks with inaccurate link-state information

    Publication Year: 2000, Page(s):1617 - 1622 vol.2
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    The quality of network services is directly affected by QoS routing algorithms, and QoS routing algorithms rely heavily on network state information specifying the resource availability at network nodes and links. In practice, the network state information is not always accurate because it does not update in time. This paper proposes a randomized QoS routing algorithm on networks with inaccurate l... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • ARQ performance in a satellite communications system with inter-satellite links

    Publication Year: 2000, Page(s):1126 - 1132 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    This paper investigates ARQ operation in a satellite communications system with intersatellite links. The satellite is considered to have on-board processing (OBP) capability which differs from a conventional bent-pipe satellite system. Throughput efficiency is derived for OBP ARQ and compared to bent-pipe ARQ. A general scenario with multiple intersatellite links is examined. Both noiseless feedb... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the design of tele-learning systems using genetic algorithms

    Publication Year: 2000, Page(s):1209 - 1212 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    A tele-learning system may be modeled using an object-oriented approach which lends to eventual simulation using object-oriented languages. In this study, the human users of the system are included as system components with their own respective characteristics, as described by such descriptive social-economic parameters as user satisfaction, user willingness to pay, and others. The current focus o... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design and applications of SDH cross-connection ASIC

    Publication Year: 2000, Page(s):1041 - 1045 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    The development of the synchronous digital hierarchy (SDH) technique relies on the evolution of ASIC. This paper introduces a novel SDH cross-connection ASIC designed by the E&E department of Tsinghua University. This chip can provide non-blocking cross-connection based on any combination of TU channels between eight STM-1 input streams and eight STM-1 output streams. A newly developed built-i... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Generalized attenuation coefficients and their application in counter-pumped fiber Raman amplifier simulation

    Publication Year: 2000, Page(s):1550 - 1553 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

    With the introduction of a pair of generalized attenuation coefficients, a novel algorithm for counter-pumped fiber Raman amplifier (FRA) is derived for unequal signal and pump loss coefficients, leading to a significant increase in the iterative step size under saturated amplification. The simulation results agree well with experimental data. This method is also effective in the numerical simulat... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Intelligent service creation environment for IN

    Publication Year: 2000, Page(s):1098 - 1101 vol.2
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    This paper proposes an intelligent agent-based intelligent networks service creation environment on the IN architecture and concept models, which is called intelligent service creation environment (ISCE), and mainly discusses the architecture and the service creation environment on the basis of intelligent agent technology. We describe how to construct the planes of IN on the intelligent agent and... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • IPv6 - future approval networking

    Publication Year: 2000, Page(s):1734 - 1739 vol.2
    Cited by:  Papers (3)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    For the increasing demand on Internet and global IP mobility, IPv6 (Internet protocol version 6) has been designed as the next-generation Internet protocol to replace the currently used IPv4 protocol. The key enhanced features of IPv6, including IPv6 addressing, quality of service (QoS), IP security (IPSec), Mobile IPv6, possible transition scenarios and mechanisms, as well as the IPv6 deployment ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A quality-of-service-based routing algorithm for point-to-point multimedia communication

    Publication Year: 2000, Page(s):1613 - 1616 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    QoS (quality of service) based network routing is one of the fundamental means to provide QoS guarantees. A QoS-based one-pass hop-by-hop routing algorithm for point-to-point multimedia communication is presented and its correctness is proved View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the robustness of the subspace method for blind signature waveform estimation in asynchronous DS/CDMA systems

    Publication Year: 2000, Page(s):1121 - 1125 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    We study the performance of the mth-order subspace method for blind signature waveform estimation in asynchronous DS/CDMA systems using a perturbation analysis approach. By partitioning the true signature waveform into the mth-order significant part and the tails, we show that the mth-order subspace method estimates a signature waveform that is close to the mth-order significant part. The closenes... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Joint operation in multi-hop WDM networks under dynamic data traffic

    Publication Year: 2000, Page(s):1205 - 1208 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    In view of the present dynamic data traffic, we raise and analyze critical issues in joint operation under IP over WDM architecture. Wavelength division multiplexing technology has been introduced into today's optical network infrastructure to accommodate the rapid growth of Internet data traffic. To minimize total network cost and maximize network resource efficiency, two main approaches have bee... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.