By Topic

Communications and Networks, Journal of

Issue 3 • Date Sept. 2000

Filter Results

Displaying Results 1 - 23 of 23
  • Overcoming fragmentation in mobile Ad Hoc networks

    Publication Year: 2000 , Page(s): 182 - 187
    Cited by:  Papers (4)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (166 KB)  

    We present an approach to multicast messages among highly mobile hosts in ad hoc networks. We suggest a new definition of a multicast that suits the special needs of inter-vehicle communication: rather than explicit identification, a multicast group is defined implicitly by location, speed, driving direction and time. As an example, we study a road accident that is reported to nearby vehicles. We ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Emerging challenges: Mobile networking for “Smart Dust”

    Publication Year: 2000 , Page(s): 188 - 196
    Cited by:  Papers (47)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (255 KB)  

    Large-scale networks of wireless sensors are becoming increasingly tractable. Advances in hardware technology and engineering design have led to dramatic reductions in size, power consumption and cost for digital circuitry, wireless communications and Micro ElectroMechanical Systems (MEMS). This has enabled very compact, autonomous and mobile nodes, each containing one or more sensors, computation... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An energy-efficient power control approach for WLANs

    Publication Year: 2000 , Page(s): 197 - 206
    Cited by:  Papers (25)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (239 KB)  

    In this paper we consider the problem of reducing energy consumption during the transmission phase in WLANs. We found that for a given network configuration, channel characteristics, and packet length, an optimum RF transmission power level exists which assures a minimum energy expenditure for the actually transmitted bit of information. Based on this observation, we present a packet length depend... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Comparative study of the performance of wavelets as shaping pulses for modulation over linear and non-linear channels

    Publication Year: 2000 , Page(s): 207 - 217
    Request Permissions | Click to expandAbstract | PDF file iconPDF (426 KB)  

    The use of orthonormal scaling functions, wavelets and wavelet packets for pulse shaping has been recently proposed in [1]–[9]. Because of their excellent spectral characteristics, such waveforms can be used for Wavelet Orthogonal Frequency Division Multiplexing (WOFDM) [2] and spectral shaping [10], [11]. In this paper we study the performance of the Meyer, Daubechies, biorthogonal Spline,... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Partial response CPM in satellite mobile systems

    Publication Year: 2000 , Page(s): 218 - 225
    Request Permissions | Click to expandAbstract | PDF file iconPDF (350 KB)  

    It is known that Gaussian minimum shift keying (GMSK) is an attractive signaling technique in mobile communications. In this study, it is demonstrated using partial response raised cosine (ZRC) modulation that other partial-response continuous phase modulation (PR-CPM) techniques can perform better than GMSK in a mobile system. ZRC signals are analyzed and compared with GMSK signals in a mobile ch... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Selective magnitude subtraction for noise reduction

    Publication Year: 2000 , Page(s): 226 - 229
    Request Permissions | Click to expandAbstract | PDF file iconPDF (130 KB)  

    A new method of spectral subtraction is proposed in this paper. Through selective application of common spectral magnitude subtraction, distortion in the processed speech can be reduced significantly without compromising on the amount of residual noise. The decision for the selection can be obtained from the noisy speech itself. A scheme for reducing the amount of residual noise as well as its mus... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fade countermeasure using signal degradation estimation for demand-assignment satellite systems

    Publication Year: 2000 , Page(s): 230 - 238
    Cited by:  Papers (3)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (346 KB)  

    This paper describes a complete fade countermeasure system, designed for thin route user-oriented and fully meshed satellite networks. The signal degradation due to the residual up-link attenuation after up-power control intervention, plus the down-link attenuation, is compensated for by varying the FEC coding and bit rates of the data. Down and up-link signal degradations are evaluated separately... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Interference suppression in CDMA systems using a sequential adaptive receiver

    Publication Year: 2000 , Page(s): 239 - 243
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (253 KB)  

    We present a single-user sequential adaptive receiver (SAR) structure for interference suppression in asynchronous direct-sequence code-division multiple-access (DS-CDMA) communication systems. Computer simulations verify the faster convergence rate of the SAR for various configurations of the SAR. The SAR is especially applicable for adapting to the time-varying channel conditions found in typica... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance of forward-link cellular DS-CDMA over frequency-selective multipath fading channels

    Publication Year: 2000 , Page(s): 244 - 247
    Request Permissions | Click to expandAbstract | PDF file iconPDF (209 KB)  

    A new frequency-selective multipath-fading model is studied for a forward-link direct-sequence code-division multiple-access (DS-CDMA) system with a multi-cell configuration. In the performance evaluation of this model, the probability density function (pdf) of the interference-to-signal ratio is first derived in closed form. This pdf is then employed to form a compact expression for efficient bit... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On higher layer protocol performance in CDMA S-ALOHA networks with packet combining in Rayleigh fading channels

    Publication Year: 2000 , Page(s): 248 - 258
    Request Permissions | Click to expandAbstract | PDF file iconPDF (199 KB)  

    Physical layer mechanisms to enhance wireless channel reliability can impact the performance of higher layer protocol techniques in a non-trivial manner. The performance implications of retransmission diversity packet combining on RLC (Radio Link Control)/MAC (Medium Access Control) layer and transport layer protocol performance are investigated for three different heuristic-based RLC/MAC layer ac... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A broadband wireless access system for wired and wireless LANs

    Publication Year: 2000 , Page(s): 259 - 265
    Request Permissions | Click to expandAbstract | PDF file iconPDF (145 KB)  

    The paper presents a broadband wireless access system for wired and wireless LANs. The system supports the provision of Internet access and of multimedia services of moderate bandwidth requirements (such as the reception of short audio and video clips) with a guaranteed minimum throughput. Design issues, as well as a prototype implementation, are discussed. The prototype has served as a testbed fo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design and implementation of an OA&M system for WLL network

    Publication Year: 2000 , Page(s): 266 - 276
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (185 KB)  

    This paper describes the design and implementation of an OA&M system for DECT-based WLL network. This system follows the client-server architecture that enables remote management through the Internet. Object-oriented design is used to yield quality software, where the entire WLL network is treated as a hierarchical collection of objects. The “plug-in” mechanism provides the ca... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Generalized max-min rate allocation: Theory and a simple implementation

    Publication Year: 2000 , Page(s): 277 - 286
    Request Permissions | Click to expandAbstract | PDF file iconPDF (309 KB)  

    An important concept in the available bit rate (ABR) service model is the minimum cell rate (MCR) guarantee as well as the peak cell rate (PCR) constraint for each flow. Due to the MCR and PCR requirements, the well-known max-min rate allocation policy no longer suffices to determine the rate allocation for each flow since it does not support either MCR or PCR. In this paper, we present a generali... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Internet traffic measurement and analysis in a high speed network environment: Workload and flow characteristics

    Publication Year: 2000 , Page(s): 287 - 296
    Cited by:  Papers (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (476 KB)  

    A study on Internet traffic characterization is essential in designing the next generation Internet. In this paper we characterize the aggregated Internet traffic based on the traffic logs captured from a high speed Internet access network environment. First, we constructed an Internet traffic measurement and analysis system in high-speed Internet access network environment. Then, we analyzed the ... View full abstract»

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

    Publication Year: 2000 , Page(s): 1
    Request Permissions | PDF file iconPDF (656 KB)  
    Freely Available from IEEE
  • Call for papers

    Publication Year: 2000 , Page(s): 1
    Request Permissions | PDF file iconPDF (381 KB)  
    Freely Available from IEEE
  • Call for papers

    Publication Year: 2000 , Page(s): 1
    Request Permissions | PDF file iconPDF (379 KB)  
    Freely Available from IEEE
  • Call for papers

    Publication Year: 2000 , Page(s): 1
    Request Permissions | PDF file iconPDF (445 KB)  
    Freely Available from IEEE
  • [Front cover]

    Publication Year: 2000 , Page(s): c1
    Request Permissions | PDF file iconPDF (416 KB)  
    Freely Available from IEEE
  • [Back cover]

    Publication Year: 2000 , Page(s): c4
    Request Permissions | PDF file iconPDF (217 KB)  
    Freely Available from IEEE
  • Feature-topic issue on Ad Hoc wireless networks

    Publication Year: 2000 , Page(s): 181
    Request Permissions | Click to expandAbstract | PDF file iconPDF (672 KB)  

    It is my pleasure to host this special mini-issue on ad hoc wireless networks for Journal of Communications and Networks (JCN). We have seen the evolution of cellular networks and observed the impact mobile phones had created on the way we work and live. Past research issues related to cellular networks include handoff, connection. and location management, GSM, D-AMPS, and CDPD arc clear examples ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Journal of Communications and Networks (JCN) - back inside cover

    Publication Year: 2000 , Page(s): c2
    Request Permissions | PDF file iconPDF (414 KB)  
    Freely Available from IEEE
  • Journal of Communications and Networks (JCN) - back inside cover

    Publication Year: 2000 , Page(s): c3
    Request Permissions | PDF file iconPDF (521 KB)  
    Freely Available from IEEE

Aims & Scope

The Journal of Communications and Networks is published six times per year, and is committed to publishing high-quality papers that advance the state-of-the-art and practical applications of communications and information networks.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
H. Vincent Poor
Princeton University