Now showing items 1-20 of 47

    • Plug and play optical (PPO) nodes: network functionalities and built-in fiber characterization techniques 

      Cerutti, Isabella, 1973-; Fumagalli, Andrea; Hui, Rongqing; Monti, Paolo, 1973-; Paradisi, Alberto; Tacca, Marco, 1973- (The University of Texas at Dallas, 2007-05-07)
      Plug and play optical (PPO) nodes may be used to facilitate the deployment of optical networks. PPO nodes must be able to learn about the signal propagation properties of the surrounding optical fibers and make their ...
    • Numerical methods for the accurate calculation of spherical bessel functions and the location of MIE resonances 

      Cantrell, C. D., (Cyrus D.), 1940- (The University of Texas at Dallas, 2013-04-16)
      This report reviews numerical methods for the accurate calculation of spherical Bessel functions and for the location of Mie resonances in a dielectric sphere. Detailed numerical results are presented for a real index of ...
    • Distributed Admission Control for IEEE 802.11 Ad Hoc Networks 

      Zhu, Hua, 1975-; Li, Ming, 1974-; Chlamtac, Imrich; Prabhakaran, B. (The University of Texas at Dallas, 2013-04-16)
      IEEE 802.11 has very poor performance in terms of throughput and transmission delay when the traffic load reaches the saturation condition. Admission control must be provided in order to guarantee the service of existing ...
    • End-to-end QoS guarantee in heterogeneous wired-cum-wireless networks 

      Li, Ming, 1974-; Zhu, Hua, 1975-; Sathyamurthy, Sathish, 1979-; Prabhakaran, B.; Chlamtac, Imrich (The University of Texas at Dallas, 2013-04-16)
      With information access becoming more and more ubiquitous, there is a need for providing QoS support for communication that spans wired and wireless networks. For the wired side, RSVP/SBM has been widely accepted as a flow ...
    • On the complexity of clustering multi-hop wireless networks 

      Basagni, Stefano, 1965- (The University of Texas at Dallas, 2013-04-18)
      A Distributed Clustering Algorithm (DCA) is presented that partitions the nodes of a fully mobile network (multi-hop network) into clusters, thus giving the network a hierarchical organization. Nodes are grouped by following ...
    • Wavelength continuity constraint in differentiated reliability (DiR) WDM rings 

      Fumagalli, Andrea; Tacca, Marco, 1973- (The University of Texas at Dallas, 2013-04-18)
      The concept of Differentiated Reliability (DiR) was recently introduced by the authors to provide multiple reliability degrees (or classes) at the same network layer using a common protection mechanism, e.g., path switching. ...
    • Distributed and mobility-adaptive clustering for ad hoc networks 

      Basagni, Stefano, 1965- (The University of Texas at Dallas, 2013-04-18)
      A distributed algorithm is presented that partitions the nodes of a fully mobile network (ad hoc network) into clusters, thus giving the network a hierarchical organization. The algorithm is proven to be adaptive to changes ...
    • Multi-rate and multi-hop optical carriers in WDM ring 

      Cerutti, Isabella, 1973-; Fumagalli, Andrea; Tacca, Marco, 1973-; Lardies, Ana; Jagannathan, Rajesh Shanmugavel, 1971- (The University of Texas at Dallas, 2013-04-18)
      Transparency of the optical layer offers the possibility to design a network that operates at varying transmission bit rates. While variable bit rate interfaces are being tested and will soon provide the possibility to ...
    • A scalable and adaptive fair access protocol for slotted WDM bus network 

      Fumagalli, Andrea; Grasso, Robert, 1972- (The University of Texas at Dallas, 2013-04-18)
      The recent progress of optical technologies has made it possible to increase the number of wavelengths (channels) practically available in the fiber by almost one order of magnitude. With this rapid growth, access protocols ...
    • The PlaNet-PTN module: a single layer design tool for packet transport networks 

      Razo, Miguel; Litovsky, Arie; Huang, Wanjun, 1978-; Sivasankaran, Arularasi; Tang, Limin, 1977-; Vardhan, Hars; Tacca, Marco, 1973-; Fumagalli, Andrea; Monti, Paolo, 1973- (The University of Texas at Dallas, 2013-05-23)
      PlaNet is a multilayer network planning tool developed at the University of Texas at Dallas. This paper illustrates some of the features of PlaNet-PTN, one of the modules available in the PlaNet tool. PlaNet-PTN can be ...
    • Finding a simple path with multiple must-include nodes 

      Vardhan, Hars; Billenahalli, Shreejith, 1982-; Huang, Wanjun, 1978-; Razo, Miguel; Sivasankaran, Arularasi; Tang, Limin, 1977-; Monti, Paolo, 1973-; Tacca, Marco, 1973-; Fumagalli, Andrea (The University of Texas at Dallas, 2013-05-23)
      This document presents an algorithm to find a simple path in the given network with multiple must-include nodes. The problem of finding a simple path with only one must-include node can be solved in polynomial time using ...
    • An analytical model with improved accuracy of IEEE 802.11 protocol under unsaturated conditions 

      Vijayasankar, Kumaran, 1984-; Taufique, Azar; Kannan, Lakshmi Narasimhan, 1984-; Tacca, Marco, 1973-; Fumagalli, Andrea (The University of Texas at Dallas, 2013-05-23)
      In this work the authors present an analytical model that - compared to previously published work- more accurately captures the delay of IEEE 802.11 protocol under low, medium, and near-saturation load conditions. A Markov ...
    • Building alternate multitasking trees in MPLS networks 

      Tang, Limin, 1977-; Billenhalli, Shreejith; Vardhan, Hars; Tacca, Marco, 1973-; Fumagalli, Andrea; Monti, Paolo, 1973- (The University of Texas at Dallas, 2013-05-23)
      An algorithm for computing alternate multicast trees in packet transport networks is proposed in this paper. The algorithm efficiently computes multiple sub-optimal tree candidates for a given multicast service request. ...
    • Wireless multimedia networks: cross-layer access protocols based on sequential opportunistic decoding (SOD) 

      Jegbefume, Onyemelem, 1977-; Saquib, M.; Tacca, Marco, 1973-; Fumagalli, Andrea; Monti, Paolo, 1973- (The University of Texas at Dallas, 2013-05-23)
      Spread spectrum (SS) solutions offer well understood advantages to wireless networking, e.g., robustness to noise and interference, concurrent asynchronous transmissions, effective power and transmission rate control ...
    • Ad Hoc 802.11b cooperative protocols: performance in a slow fading channel 

      Agarwal, Niraj, 1977-; ChanneGowda, Divya, 1981-; Kannan, Lakshmi Narasimhan, 1984-; Tacca, Marco, 1973-; Fumagalli, Andrea (The University of Texas at Dallas, 2013-05-24)
      This paper investigates the use of cooperative communications in the context of ad hoc IEEE 802.11b to combat radio signal degradations due to slow fading. The performance gain of both an existing cooperative protocol and ...
    • Cooperative communications in multihop networking: a case study based on the IEEE 802.11 protocol 

      Kannan, Lakshmi Narasimhan, 1984-; Vijayasankar, Kumaran, 1984-; ChanneGowda, Divya, 1981-; Agarwal, Niraj, 1977-; Fumagalli, Andrea; Tacca, Marco, 1973- (The University of Texas at Dallas, 2013-05-24)
      This paper combines multi-hop networking with single-hop cooperative communications. The solution is built upon the standard IEEE 802.11 protocol operating in the ad hoc mode. A simulation based comparison is carried out ...
    • Optimization of interference alignment beamforming vectors 

      Kim, Douglas E.; Torlak, Murat (The University of Texas at Dallas, 2013-05-24)
      Interference alignment, while optimum in its achievement of the maximum degrees of freedom for the K user interference channel, does so only at high SNR and for large numbers of dimensions over which to align the interference, ...
    • Trading network management complexity for blocking probability when placing optical regenerators 

      Savasini, Marcio S.; Monti, Paolo, 1973-; Fumagalli, Andrea; Tacca, Marco, 1973-; Waldman, Helio (The University of Texas at Dallas, 2013-05-24)
      Optical signal regenerators (3R) are required to overcome the adverse effect of fiber and other transmission impairments. 3R units may be placed either at every node (full placement) or at some selected nodes (sparse ...
    • Reconfigurable optical networks: a cross layer approach 

      Roshani-Tabrizi, Reza, 1976-; Monti, Paolo, 1973-; Tacca, Marco, 1973-; Fumagalli, Andrea (The University of Texas at Dallas, 2013-05-24)
      This paper presents the Pruning with Memory (PWM) algorithm, which computes a cross layer optimal reconfiguration sequence in reconfigurable IP/MPLS over optical networks.
    • Destination-initiated wavelength-weighted reservation protocol in WDM rings 

      Pitchumani, Sudhakar, 1978-; Cerutti, Isabella, 1973-; Fumagalli, Andrea (The University of Texas at Dallas, 2013-06-03)
      In networks that require dynamic assignment of wavelengths, it is known that destination initiated reservation protocols lower the blocking robability - caused by unavailable wavelengths or convergence problems of the ...