By Topic

Communications, 2002. ICC 2002. IEEE International Conference on

Date April 28 2002-May 2 2002

Go

Filter Results

Displaying Results 1 - 25 of 145
  • 2002 IEEE International Conference on Communications [front matter]

    Publication Year: 2002 , Page(s): 0_1 - lvi
    Save to Project icon | Request Permissions | PDF file iconPDF (6052 KB)  
    Freely Available from IEEE
  • Burst segmentation: an approach for reducing packet loss in optical burst switched networks

    Publication Year: 2002 , Page(s): 2673 - 2677 vol.5
    Cited by:  Papers (64)  |  Patents (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (222 KB) |  | HTML iconHTML  

    We address the issue of contention resolution in optical burst switched networks, and we introduce an approach for reducing packet losses which is based on the concept of burst segmentation. In burst segmentation, rather than dropping the entire burst during contention, the burst may be broken into multiple segments, and only the overlapping segments are dropped. The segmentation scheme is investi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Coverage in wireless ad-hoc sensor networks

    Publication Year: 2002 , Page(s): 3174 - 3178 vol.5
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (280 KB) |  | HTML iconHTML  

    Sensor networks pose a number of challenging conceptual and optimization problems such as location, deployment, and tracking. One of the fundamental problems in sensor networks is the calculation of the coverage. In Meguerdichian et al. (2001), it is assumed that the sensor has uniform sensing ability. In this paper, we give efficient distributed algorithms to optimally solve the best-coverage pro... View full abstract»

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

    Publication Year: 2002 , Page(s): 3449 - 3456
    Save to Project icon | Request Permissions | PDF file iconPDF (208 KB)  
    Freely Available from IEEE
  • Finding protection cycles in DWDM networks

    Publication Year: 2002 , Page(s): 2756 - 2760 vol.5
    Cited by:  Papers (19)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (274 KB) |  | HTML iconHTML  

    We introduce the problem of mesh optical network protection based on multiple logical ring/cycles. A two-staged problem formulation as well as classical ring finding algorithms are first discussed. A state-of-art protection cycle (p-cycle) finding algorithm is then proposed. This algorithm is scalable and especially suitable for sparse mesh networks. Finally, the performance of the algorithm is ga... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • System design for aeronautical broadband satellite communications

    Publication Year: 2002 , Page(s): 2994 - 2998 vol.5
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1721 KB) |  | HTML iconHTML  

    The paper discusses various aspects of aeronautical broadband satellite communications (AirCom). Market issues are addressed, and a range of relevant services is identified and classified. A structured overview of key issues and respective steps for the system design of an AirCom system is given. It is intended to provide a generalized baseline for a systematic AirCom design process and reflect so... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Utility-oriented adaptive QoS and bandwidth allocation in wireless networks

    Publication Year: 2002 , Page(s): 3071 - 3075 vol.5
    Cited by:  Papers (17)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (241 KB) |  | HTML iconHTML  

    In this paper we propose a general utility-oriented adaptive quality of service (QoS) model for wireless networks and establish a framework for formulating the bandwidth allocation problem for users with time-varying links. For slow link variations, it is inadequate to only employ low-level adaptive mechanisms at the symbol or packet level, such as error correction coding or swapping packet transm... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Uplink admission control in WCDMA based on relative load estimates

    Publication Year: 2002 , Page(s): 3091 - 3095 vol.5
    Cited by:  Papers (12)  |  Patents (12)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (278 KB) |  | HTML iconHTML  

    When operating a cellular radio system at nearly full capacity, admitting yet another user may jeopardize the stability of the system as well as the performance of the individual users. Therefore, proper admission control is crucial. Prior art includes algorithms which limit the number of users or the uplink interference per cell. Both are known to yield roughly the same performance, but the forme... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimal configuration of p-cycles in WDM networks

    Publication Year: 2002 , Page(s): 2761 - 2765 vol.5
    Cited by:  Papers (53)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (231 KB) |  | HTML iconHTML  

    We investigate the deployment of p-cycles (preconfigured protection cycles) in WDM mesh networks with and without wavelength conversion. We develop optimization models for the configuration of the cycles and apply these on a case study for a pan-European network. The results in particular for wavelength converting networks show that p-cycles achieve high efficiency. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On-demand access for next generation NASA missions

    Publication Year: 2002 , Page(s): 2999 - 3003 vol.5
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (347 KB) |  | HTML iconHTML  

    We discuss medium access control (MAC) issues related to the migration to the next generation on-demand mode for communication support of NASA missions in near Earth orbits. For this scenario, to meet the objective of bandwidth-efficient support while guaranteeing specific QoS requirements, a detailed investigation of the suitability of the MAC schemes is performed. Performance measures of interes... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Analysis of mobile multicasting in IP-based wireless cellular networks

    Publication Year: 2002 , Page(s): 3388 - 3392 vol.5
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (266 KB) |  | HTML iconHTML  

    As the wireless Internet is burgeoning with a variety of multicast based applications (e.g. teleconferencing, live video and stock quote broadcasts), a cost analysis of multicasting in wireless networks is needed to help service providers in their cost-benefit tradeoff. This paper presents such an analysis in IP-based cellular networks, considering user mobility which directly affects the multicas... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Estimating velocity of mobiles in EDGE systems

    Publication Year: 2002 , Page(s): 3240 - 3244 vol.5
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (485 KB) |  | HTML iconHTML  

    A new algorithm is modified and applied for estimating mobile velocity for EDGE (enhanced data rates for GSM evolution) cellular systems. The algorithm uses normalized autocorrelation of filtered received signals to estimate the velocity of EDGE mobiles. The algorithm works well for both non-dispersive channels and dispersive channels including typical urban and hilly terrain propagation models. S... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the deflection routing in QoS supported optical burst-switched networks

    Publication Year: 2002 , Page(s): 2786 - 2790 vol.5
    Cited by:  Papers (4)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (263 KB) |  | HTML iconHTML  

    Generally speaking, buffer requirement is not vital for JET-based optical burst switching (OBS). However, if deflection routing is enabled, optical buffers are necessary to solve the insufficient offset time problem. Another solution, which can alleviate buffering, is to lengthen offset time in the beginning. As previous work indicated, a burst with extra offset time has higher priority than that ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the cutoff rate of a variable-bit-rate (VBR) OFFH-CDMA system

    Publication Year: 2002 , Page(s): 2927 - 2932 vol.5
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1354 KB) |  | HTML iconHTML  

    A new method is proposed to analyze the cutoff rate of a variable-bit-rate (VBR) optical fast frequency hopping code division multiple access system (OFFH-CDMA) using fiber Bragg gratings and direct detection. This approach exploits the linear structure of passive optical CDMA systems and the nominal time required to accomplish the encoding-decoding operations in such systems. A system model is pr... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Internally bandwidth efficient channel coding for fiber-optic CDMA communication systems with soft-input decoding

    Publication Year: 2002 , Page(s): 2922 - 2926 vol.5
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1521 KB) |  | HTML iconHTML  

    We consider using a soft-input decoder for internally bandwidth efficient convolutionally coded fiber-optic code division multiple access (CDMA) communication systems using optical orthogonal codes (OOC). The convolution codes that are used for demonstrating the capabilities of the soft-input decoder are super orthogonal codes (SOC). These codes are near optimal and have a relatively low complexit... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance evaluation of priority-based call admission control in multi-service DS-CDMA cellular networks supporting VBR video traffic

    Publication Year: 2002 , Page(s): 3096 - 3105 vol.5
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (393 KB) |  | HTML iconHTML  

    This paper analyses the performance of priority based call admission control policies on the reverse link (mobile to cell-site) of DS-CDMA (direct-sequence code division multiple access) based cellular networks supporting VBR (variable bit rate) video traffic along with voice and data. Such analysis is important for estimating capacity requirements of competing services in multi-service DS-CDMA ne... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An optimal location management scheme for minimizing signaling cost in Mobile IP

    Publication Year: 2002 , Page(s): 3313 - 3317 vol.5
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (300 KB) |  | HTML iconHTML  

    Mobile IP is a solution for mobility on the global Internet. However, it does not extend well to highly mobile users. Mobile IP regional registration Is proposed to reduce the number of location updates to the home network, and reduce the signaling delay. This paper introduces an optimal regional location management mechanism for Mobile IP that results in the minimum signaling cost. A novel discre... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • QoS issues in redundant trees for protection in vertex-redundant or edge-redundant graphs

    Publication Year: 2002 , Page(s): 2766 - 2770 vol.5
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (227 KB) |  | HTML iconHTML  

    We study quality of service issues in preplanned recovery using redundant trees in vertex-redundant or edge-redundant graphs. In particular, we present efficient heuristic algorithms for finding a pair of working-protection trees with large bandwidth in the working tree. Computational results are presented to demonstrate the effectiveness of our algorithms. Many challenging problems remain open. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A cost-effective construction for WDM multicast switching networks

    Publication Year: 2002 , Page(s): 2902 - 2906 vol.5
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (243 KB) |  | HTML iconHTML  

    Multicast, or one-to-many, communication is one of the most important collective communication operations. Current trends in networking applications indicate that there will be an increasing demand in future networks for multicast. In particular, as wavelength division multiplexing (WDM) networks emerge, supporting multicast at the WDM layer becomes an important yet challenging topic. In this pape... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Scheduling start time in CDMA burst admission

    Publication Year: 2002 , Page(s): 3133 - 3137 vol.5
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (333 KB) |  | HTML iconHTML  

    Burst transmission protocols have been proposed in the next generation CDMA cellular systems to support short-time high-speed data communications. The existing burst admission algorithm considers only the current interference condition in the system. The burst transmission request will be rejected if the interference in the system exceeds the acceptable level with the burst admitted. In this paper... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Efficient algorithms for the assignment of OVSF codes in wideband CDMA

    Publication Year: 2002 , Page(s): 3055 - 3060 vol.5
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (248 KB) |  | HTML iconHTML  

    This paper proposes some novel techniques to accommodate users with different transmission rate requirements in a CDMA system which employs orthogonal variable spreading factor codes. Several static and dynamic code assignment strategies are put forth and their behavior investigated, in terms of call blocking probability and number of required call reassignments. Their efficiency in dealing with v... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multimedia over satellite - the European Space Agency perspective

    Publication Year: 2002 , Page(s): 3004 - 3009 vol.5
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (197 KB) |  | HTML iconHTML  

    The paper introduces the authors' view on multimedia over satellite in general, discusses the trade-off between packet and circuit oriented systems, and presents an overview of recent and ongoing activities in this field by the European Space Agency (ESA). View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Dynamic routing in translucent WDM optical networks

    Publication Year: 2002 , Page(s): 2796 - 2802 vol.5
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (299 KB) |  | HTML iconHTML  

    Translucent WDM optical networks use sparse placement of regenerators to overcome the impairments and wavelength contention introduced by fully transparent networks, and achieve a performance close to fully opaque networks with much less cost. Our previous study proved the feasibility of translucent networks using the sparse regeneration technique. We addressed the placement of regenerators based ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Low latency handoff for wireless IP QoS with NeighborCasting

    Publication Year: 2002 , Page(s): 3245 - 3249 vol.5
    Cited by:  Papers (13)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (201 KB) |  | HTML iconHTML  

    This paper introduces a fast handoff mechanism, NeighborCasting, for use in wireless IP networks that utilize neighboring foreign agent (FA) information. NeighborCasting is based on the policy of utilizing, or perhaps even wasting, wired bandwidth between foreign agents, while minimizing RF (radio frequency) bandwidth exchanges, so that handoff latency is minimized. We demonstrate that the handoff... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • CRC-16 polynomials optimized for applications using self-synchronous scramblers

    Publication Year: 2002 , Page(s): 2791 - 2795 vol.5
    Cited by:  Papers (2)  |  Patents (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1201 KB) |  | HTML iconHTML  

    In order to protect public network data transmission from layer 1 attacks by malicious users, self-synchronous scramblers have come into widespread use. Such networks include those using ATM, packet over SONET (POS), and the new generic framing procedure (GFP). Unfortunately, self-synchronous descramblers cause error multiplication that can degrade the performance of the popular CRC error check co... View full abstract»

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