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

Date 21-25 Aug. 2000

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  • 2000 International Conference on Communication Technology Proceedings [front matter]

    Publication Year: 2000 , Page(s): 0_1 - 27
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  • Practical traffic grooming scheme for single-hub SONET/WDM rings

    Publication Year: 2000 , Page(s): 1193 - 1200 vol.2
    Request Permissions | 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»

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  • Author index

    Publication Year: 2000 , Page(s): 1 - 8
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    Freely Available from IEEE
  • Synchronization issues in SDH networks

    Publication Year: 2000 , Page(s): 1033 - 1036 vol.2
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    From the perspective of the history of network synchronization, the paper proposes several synchronization issues in SDH networks. The architecture of the SDH equipment clock (SEC) is also presented. The role and the implementation of desynchronizer, one of the SDH key components, is discussed in detail. Some points to be considered when designing a digital synchronization network are also outline... View full abstract»

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  • Software radio technology in spread spectrum communication

    Publication Year: 2000 , Page(s): 1117 - 1120 vol.2
    Cited by:  Papers (5)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (244 KB)  

    Software radio as a new emerging technology has been widely regarded. It becomes the final aim that radio realizes software processing and controlling. With restriction of the speed of the digital processing devices, especially the bottleneck of DSP, today's research in software radio is mostly limited to traditional narrowband signals (<2 MHz). A new kind of scheme in accordance with spread sp... View full abstract»

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  • Burst demodulation of QAM with data-aided estimation of carrier frequency

    Publication Year: 2000 , Page(s): 1354 - 1357 vol.2
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    To achieve burst carrier synchronization and demodulation of QAM, a new Viterbi-type algorithm is developed by the use of data-aided frequency estimation. This algorithm can quickly acquire the exact carrier offset, then remove it during the process of demodulation. Simulations show that the algorithm approaches coherent demodulation at only a little expense of short pilot data, thereby being appl... View full abstract»

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  • The improved differential chaos shift keying scheme

    Publication Year: 2000 , Page(s): 1361 - 1363 vol.2
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    In the differential chaos shift keying scheme (DCSK), as the chaotic signal is not periodic, the energy per bit carried by the chaotic signal is not constant and can only be estimated; this estimation has a non-zero variance that reduces the noise performance of the system. In this paper, a novel DCSK with chaotic polyphase sequences is presented. The estimation problem can be solved efficiently u... View full abstract»

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  • A novel scheme of FLEX pager design

    Publication Year: 2000 , Page(s): 1669 - 1672 vol.2
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    FLEX protocol is the de-facto standard of the high speed paging system in China and the USA. Most FLEX pager designs consist of three parts: RF module, MCU and FLEX decoder. This paper describes a new design scheme in which the MCU and FLEX decoder functions are accomplished by an ASIC based on a structure of MCU+DSP. In order to store the MCU and DSP program in the limited memory buffer on the RI... View full abstract»

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  • Extinction ratio improvement in XGM wavelength conversion based on novel scheme

    Publication Year: 2000 , Page(s): 1571 - 1574 vol.2
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    A novel scheme for XGM wavelength conversion based on single-port-coupled SOA has been achieved with improved extinction ratio performance. In wavelength upconversion between 1549.8 nm and 1562.6 nm at 2.5 Gbit/s, the output extinction ratio can be higher than 15 dB. Theoretical calculation shows that its extinction ratio and input dynamic range are better than that in conventional schemes based o... View full abstract»

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  • Joint operation in multi-hop WDM networks under dynamic data traffic

    Publication Year: 2000 , Page(s): 1205 - 1208 vol.2
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    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»

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  • A statistical simulation model for correlated Nakagami fading channels

    Publication Year: 2000 , Page(s): 1680 - 1684 vol.2
    Cited by:  Papers (10)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (332 KB)  

    Efficient simulation models for correlated Nakagami-m fading channels are required for the development, performance evaluation and validation of diversity combining systems in general fading channels. We propose a theoretical explanation of the Nakagami-m distribution, as a natural extension of the Rayleigh fading model. In this model, a Nakagami random variable is viewed as the norm of an m-dimen... View full abstract»

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  • Third-generation (3G) radio access standards

    Publication Year: 2000 , Page(s): 1017 - 1023 vol.2
    Cited by:  Papers (1)  |  Patents (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (532 KB)  

    Digital cellular and personal communication service (PCS) technologies have been a major success for the global wireless industry for voice and low bit-rate data services. Recent trends in wireless demonstrate that mobile telephony penetration has either reached fixed telephony levels or even exceeded them, particularly in Nordic countries. Also, the Internet is growing at an explosive pace. The c... View full abstract»

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  • A new implementation algorithm for multiplexing and channel coding scheme in W-CDMA

    Publication Year: 2000 , Page(s): 1685 - 1688 vol.2
    Cited by:  Papers (1)  |  Patents (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (244 KB)  

    Multiplexing and channel coding is of great importance in W-CDMA. It provides a data passageway from MAC (medium access control) layer to physical layer to ensure the efficient and reliable transmission of data streams. The channel coding scheme is a combination of error detection, error collecting and rate matching, interleaving and transport channel mapping on to/splitting from physical channels... View full abstract»

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  • Time-critical multimedia components and cell delay jitter

    Publication Year: 2000 , Page(s): 1364 - 1371 vol.2
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    The delivery of multimedia services easily faces the problem of guaranteeing the required delay performance for delay sensitive service components. The problem is especially severe with isochronous service components, such as voice and video. The transport network should guarantee, e.g., required bit rate, end-to-end delay, delay variation and error ratio performance, for each tributary of a multi... View full abstract»

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  • Intelligent service creation environment for IN

    Publication Year: 2000 , Page(s): 1098 - 1101 vol.2
    Cited by:  Patents (1)
    Request Permissions | 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»

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  • A new kind of broadband wireless access networks

    Publication Year: 2000 , Page(s): 1673 - 1679 vol.2
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    The paper provides a development scheme for broadband wireless access networks according to the tendency and new production in global communications. Moreover, new theories and key technologies involved in the scheme are examined View full abstract»

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  • Multilayer chaotic encryption for secure communications in packet switching networks

    Publication Year: 2000 , Page(s): 1575 - 1582 vol.2
    Cited by:  Papers (2)  |  Patents (21)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (536 KB)  

    A new, efficient algorithm for secure digital communications in packet switching networks is presented. The symmetric cipher proposed exploits the intrinsic synchronization between sender and receiver offered by the network. The key is dynamically adapted by means of a multilayer architecture, the advantage of which is to provide a scalable degree of security. Several interesting features of the m... View full abstract»

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  • A buffer allocation mechanism for VBR video playback

    Publication Year: 2000 , Page(s): 1641 - 1644 vol.2
    Cited by:  Patents (24)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (336 KB)  

    This paper presents a buffer allocation mechanism for VBR (variable bit rate) video playback. VoD (video on demand) is one of the multimedia applications which attract more attention. However, it remains a big challenge for real-time VBR-based VoD to achieve a satisfactory QoS, since the size of VBR video frames can be largely varied and the packets of each frame may encounter different delay vari... View full abstract»

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  • On the design of tele-learning systems using genetic algorithms

    Publication Year: 2000 , Page(s): 1209 - 1212 vol.2
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    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»

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  • Compact and economical MMI optical power splitter for optical communication

    Publication Year: 2000 , Page(s): 1561 - 1564 vol.2
    Cited by:  Patents (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (188 KB)  

    We present 1×8 and 1×16 optical power splitters based on MMI coupler in GaAs-GaAlAs. The input and output single mode waveguides are optimized by the discrete spectral index method (DSIM) and we obtain moderate square spot on the output in deep-etched rib waveguides. These splitters have good optical performance. They are suitable and important components in modern-day optical communic... View full abstract»

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  • Benefits and implementation of TD-SCDMA

    Publication Year: 2000 , Page(s): 1013 - 1016 vol.2
    Cited by:  Papers (6)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (300 KB)  

    TD-SCDMA (time division synchronous CDMA) is proposed by the Chinese WTS (Wireless Telecommunication Standards) to ITU and accepted as a 3rd generation standard for mobile radio applications. This contribution gives an overview of the basics, the implementation and the benefits of TD-SCDMA for optimized spectrum efficiency in TDD operation for symmetric and asymmetric services. The 3rd generation ... View full abstract»

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  • A routing problem on ad-hoc networks and graph theory

    Publication Year: 2000 , Page(s): 1710 - 1713 vol.2
    Cited by:  Papers (1)
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    The demand for communication services is rapidly increasing, because the mobile communication service is synonymous with an ideal communication style realizing communication anytime, anywhere and with anyone. There exist various problems to which graph and network theory is applicable in mobile communication services. For example, it is well known that coloring algorithms of graphs are applicable ... View full abstract»

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  • Feedback suppression in reliable multicast protocol

    Publication Year: 2000 , Page(s): 1436 - 1439 vol.2
    Cited by:  Patents (10)
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    Feedback implosion is one of the crucial issues confronting the scalability of reliable multicast protocols. Generally, there are two ways of solving this feedback implosion problem-timer-based and structure-based approaches. In the timer-based approach, when a receiver needs to send feedback, it multicasts the feedback to all receivers earlier than the other receivers, and hence suppresses others... View full abstract»

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  • A source-based bandwidth-delay-bounded multicasting algorithm

    Publication Year: 2000 , Page(s): 1258 - 1261 vol.2
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    The problem of multicasting (MC) assumes a new dimension in multimedia communication networks. One main object of studying MC problems is to find a way to support the QoS need of each user, and to minimize the MC tree cost. This problem is related to the constrained Steiner tree. In this paper, we propose a novel source-based bandwidth-delay-constrained low-cost multicast routing algorithm, which ... View full abstract»

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  • Key issues of resource management in distributed multimedia computer systems

    Publication Year: 2000 , Page(s): 1629 - 1632 vol.2
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    The guarantee of quality of service (QoS) of multimedia applications is a kernel issue in the resource management of distributed multimedia computer systems. Some key issues for resource management in multimedia transmission are researched in this paper as follows: (1) the relation between QoS and resource management, (2) the algorithm for scheduling distributed multimedia tasks, (3) the paradigm ... View full abstract»

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