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Communications, 2000. ICC 2000. 2000 IEEE International Conference on

Date 2000

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  • Joint base station and channel allocation in mobile cellular networks

    Publication Year: 2000, Page(s):1558 - 1562 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    Overlapping cell coverage areas come into play in all mobile cellular systems, especially in small-cell, high-capacity microcellular networks. Calls arising in the overlap area have access to channels of more than one base station and can select the appropriate base station to establish a connection. In this case the problems of base station and channel assignment arise jointly. We address the joi... View full abstract»

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  • International conference on communications [front matter]

    Publication Year: 2000, Page(s):i - xxxii
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    Freely Available from IEEE
  • Author index

    Publication Year: 2000, Page(s):1809 - 1814
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    Freely Available from IEEE
  • Collision-avoidance transmission scheduling for ad-hoc networks

    Publication Year: 2000, Page(s):1788 - 1794 vol.3
    Cited by:  Papers (7)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (700 KB)

    A novel multichannel schedule-based medium access control (MAC) protocol for ad-hoc networks, named collision-avoidance transmission scheduling (CATS) is introduced. CATS allows nodes to contend for and reserve data channels for specific time slots by means of distributed reservation and collision-avoidance handshakes. Contention is limited among nodes within two hops of one another, which provide... View full abstract»

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  • TCP-SMART: a technique for improving TCP performance in a spotty wide band environment

    Publication Year: 2000, Page(s):1783 - 1787 vol.3
    Cited by:  Papers (1)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    We describe a scheme called TCP-SMART to improve the end-to-end throughput of TCP connections in the spotty wide band environment. In this scheme, a TCP-SMART agent at the base station uses local retransmissions, acknowledgment filtering, and selective generation of duplicate acknowledgments to increase the TCP throughput despite extended periods of poor channel conditions and short disconnections... View full abstract»

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  • Spreading sequence adaptation in multicode CDMA systems

    Publication Year: 2000, Page(s):1375 - 1379 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    The problem of adapting the spreading sequences and the transmission powers of different users in a multicode direct-sequence code division multiple access (DS-CDMA) system is considered. Particular attention is given to a distributed algorithm which updates each pair of transmitter and receiver without information from other users. The sequence adaptation problem and the algorithm are studied fro... View full abstract»

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  • Soft decoding of variable-length codes

    Publication Year: 2000, Page(s):1203 - 1207 vol.3
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    We present the results of two methods for soft decoding of variable-length codes. We first show that maximum likelihood (ML) sequential decoding and maximum a posteriori (MAP) sequence estimation gives significant decoding improvements over hard decisions alone, then we show that further improvements can be gained by additional transmission of the symbol length. Finally, we show that it is possibl... View full abstract»

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  • The scalable networking scheme for high-speed networks

    Publication Year: 2000, Page(s):1335 - 1342 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1072 KB)

    We propose a scalable networking scheme for high-speed networks where quality of service (QoS) is important. The main objective of the scheme is to provide QoS guarantees and to achieve scalability to very large traffic volume and link bandwidth. Other important goals include extensibility, small to moderate buffer requirements, high throughput, small latency, and loss-free communication. The prop... View full abstract»

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  • QOAG: an efficient queueing policy for input-buffered packet switches

    Publication Year: 2000, Page(s):1753 - 1757 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    An efficient self-adaptive packet queueing policy, called Queueing with Output Address Grouping (QOAG), is proposed for optimizing the performance of an input buffered packet switch. Each input port of the N×N switch under consideration has Q queues and each queue has B packet buffers, where 1<Q<N. Using QOAG, a packet arriving at an input port is assigned to the queue which has some b... View full abstract»

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  • Uplink PCCMA through slow fading multipath channel

    Publication Year: 2000, Page(s):1370 - 1374 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    This paper presents results obtained by applying periodic clock changes multiple access (PCCMA) to the uplink of mobile multiuser communication systems. Emitted signals are subjected to periodic clock changes based on linear time variant filters. At the reception side, we transpose the system in the time invariant domain and apply inverse filtering View full abstract»

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  • Capacity of a packet switched cellular network with link adaptation

    Publication Year: 2000, Page(s):1568 - 1572 vol.3
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    The purpose of this paper is the calculation of the teletraffic capacity of a cellular radio network that uses packet switching for voice transmission. In addition the network can support two types of voice connections: full rate and half rate, depending on the channel conditions. Switching between the two types is achieved by using link adaptation. We formulate a two-dimensional birth-death model... View full abstract»

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  • Edge profile optimal constellation labeling

    Publication Year: 2000, Page(s):1198 - 1202 vol.3
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    Structurally distinct constellation labeling exists within both the Gray code and the set-partitioning paradigm. Different labeling choices within either paradigm can provide different bit error rates, especially at low SNR. This paper demonstrates that symmetric ultracomposite (SU) labeling, an extension of the binary reflected Gray code, provides undominated edge profiles for all standard PSK, P... View full abstract»

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  • Adaptive weight functions for shortest path routing algorithms for multi-wavelength optical WDM networks

    Publication Year: 2000, Page(s):1330 - 1334 vol.3
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    Optical dense wavelength division multiplexed (DWDM) networks are an attractive candidate for the next generation Internet and beyond. In this paper, we consider the wide area wavelength routed backbone network with circuit-switching. Given a session request, the routing and wavelength assignment (RWA) problem is to calculate a path between two nodes, and also assign a set of wavelengths along thi... View full abstract»

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  • Wavelength requirements for virtual topology reconfiguration in WDM ring networks

    Publication Year: 2000, Page(s):1650 - 1654 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    Through the use of configurable WDM technology including tunable optical transceivers and frequency selective switches, next generation WDM networks will allow multiple virtual topologies to be dynamically established on a given physical topology. We determine the number of wavelengths required to support all possible virtual topologies on a bidirectional ring physical topology. We first determine... View full abstract»

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  • Route-lifetime assessment based routing (RABR) protocol for mobile ad-hoc networks

    Publication Year: 2000, Page(s):1697 - 1701 vol.3
    Cited by:  Papers (58)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    Owing to the absence of any static support structure, ad-hoc networks are prone to link failures. The `shortest path seeking' routing protocols may not lead to stable routes. The consequent route failures that ensue, lead to the degradation of system throughput. This paper suggests a routing protocol wherein the route selection is done on the basis of an intelligent residual lifetime assessment of... View full abstract»

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  • A new line code for 10-Gigabit Ethernet: MB810

    Publication Year: 2000, Page(s):1774 - 1777 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    The 10-Gigabit Ethernet (10GbE) is emerging as an alternative for solving the bottleneck of wide area network (WAN) links. Currently, the choice of line codes is being an issue in the 10GbE standardization. We review the candidates for the 10GbE line code, and propose a new line code, MB810, for 10GbE. Its spectrum is bounded within the Nyquist band and has no DC component. This code can improve t... View full abstract»

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  • FDMA capacity of the Gaussian multiple access channel with ISI

    Publication Year: 2000, Page(s):1365 - 1369 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    This paper proposes a numerical method for characterizing the achievable rate region for a Gaussian multiple access channel with ISI under the frequency division multiple access restriction. The frequency spectrum is divided into discrete frequency bins and the discrete bin assignment problem is shown to have a convex programming relaxation, making it tractable to numerical algorithms. The run-tim... View full abstract»

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  • Radio network performance of Bluetooth

    Publication Year: 2000, Page(s):1563 - 1567 vol.3
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    A new radio interface named Bluetooth has been developed to provide short range connectivity between various consumer devices. The Bluetooth system operates in the unlicensed 2.45 GHz ISM band and applies frequency hopping over 79 carriers. This paper presents the simulation results of the radio network performance of a large number of co-located Bluetooth units. For a capacity-demanding WWW data ... View full abstract»

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  • Comparison of multilevel coded modulations with different decoding methods for AWGN and Rayleigh fading channels

    Publication Year: 2000, Page(s):1193 - 1197 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Multilevel coding (MLC) schemes based on channel capacity with multistage decoding (MSD) and parallel decoding on levels (PDL) are considered and compared. The channel models AWGN and Rayleigh fading are used in order to study the performance of MLC systems under different conditions. The investigation is done for 8ASK modulation and three set partitioning strategies. In each scheme BCH codes with... View full abstract»

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  • Code division multiplexing-efficient modulation for high data rate transmission over wireless channels

    Publication Year: 2000, Page(s):1487 - 1491 vol.3
    Cited by:  Papers (7)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    Code division multiplexing (CDM) is proposed as a modulation format for single user communication over highly dispersive fading channels. This modulation format uses well-known spread spectrum technology together with newly developed multiuser detection techniques to produce a modulation and demodulation technique for non-spread data transmission. It is shown that for frequency selective fading ch... View full abstract»

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  • Optimal cache-partitioning for active reliable multicast

    Publication Year: 2000, Page(s):1406 - 1410 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    Active reliable multicast (ARM) is a newly proposed loss recovery scheme for reliable multicast over the Internet. For a given amount of total cache available at each active router, the performance of ARM depends on how the amount of cache is partitioned to each multicast session. We call it the cache-partitioning problem. Following the approach of minimizing the total loss recovery traffic in the... View full abstract»

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  • IP forwarding alternatives in cell switched optical networks

    Publication Year: 2000, Page(s):1628 - 1632 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    Optical switching will enable core Internet packet switching to scale with future transmission rate increases. Currently proposed optical ATM switches do not allow packet reassembly, which is necessary for packet level forwarding. This results in the requirement to create end to end ATM virtual connections for flows even if they contain only one packet. In electronically switched networks MPOA and... View full abstract»

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  • Prediction-based admission control using FARIMA models

    Publication Year: 2000, Page(s):1325 - 1329 vol.3
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    The FARIMA (p,d,q) model is a good traffic model capable of capturing both the long-range and short-range behavior of a network traffic stream in time. In this paper, we propose a prediction-based admission control algorithm for an integrated service packet network. We suggest a method to simplify the FARIMA model fitting procedure and hence to reduce the time of traffic modeling and prediction. O... View full abstract»

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  • Performance of turbo codes in Rayleigh fading channels with adaptive channel estimation

    Publication Year: 2000, Page(s):1665 - 1669 vol.3
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    For turbo-coding systems in mobile fading environments, fading amplitudes must be provided to the turbo decoder in order to exhibit the full potential of turbo codes. We investigate the performance of turbo-coding systems with adaptive channel estimation in the Rayleigh flat-fading channels. Two system models are considered for simulations. In the first model, the channel estimation is performed p... View full abstract»

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  • A novel joint strength and SIR based CDMA reverse link power control with variable target SIR

    Publication Year: 2000, Page(s):1502 - 1505 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    The use of power control to achieve the desired signal-to-interference ratio (SIR) is a crucial issue to ensure the quality of service of a code division multiple access (CDMA) cellular system. Power control based on SIR alone, however, often leads to the problem of vicious circle such that all mobile stations reach their power limits and yet, fail to achieve the desired SIR. In this paper, we pre... View full abstract»

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