Now showing items 1-20 of 33

    • Adding structure to unstructured peer-to-peer networks: the role of overlay topology 

      Merugu, Shashidhar; Srinivasan, Sridhar; Zegura, Ellen W. (Georgia Institute of Technology, 2003)
      Our work examines the role of overlay topology on the performance of unstructured peer-to-peer systems. We focus on two metrics of performance: (a) search protocol performance, a local gain perceived directly by a user ...
    • Application-Layer Anycasting 

      Bhattacharjee, Samrat; Ammar, Mostafa H. (Mostafa Hamed); Zegura, Ellen W.; Shah, Viren; Fei, Zongming (Georgia Institute of Technology, 1996)
      Server replication is a key approach for maintaining user-perceived quality of service within a geographically wide-spread network. The anycasting communication paradigm is designed to support server replication by ...
    • An Architecture for Active Networking 

      Bhattacharjee, Samrat; Calvert, Kenneth L.; Zegura, Ellen W. (Georgia Institute of Technology, 1996)
      Active networking offers a change in the usual network paradigm: from passive carrier of bits to a more general computation engine. The implementation of such a change is likely to enable radical new applications that ...
    • Bootstrapping in Gnutella: A Preliminary Measurement Study 

      Karbhari, Pradnya; Ammar, Mostafa H. (Mostafa Hamed); Dhamdhere, Amogh Dhananjay; Raj, Himanshu; Riley, George F.; Zegura, Ellen W. (Georgia Institute of Technology, 2003)
      To join an unstructured peer-to-peer network like Gnutella, peers have to execute a bootstrapping function in which they discover other on-line peers and connect to them. Until this bootstrapping step is complete, a ...
    • Capacity Enhancement Using Throw-Boxes in Mobile Delay Tolerant Networks 

      Zhao, Wenrui; Chen, Yang; Ammar, Mostafa H. (Mostafa Hamed); Corner, Mark D.; Levine, Brian; Zegura, Ellen W. (Georgia Institute of Technology, 2006)
      Delay tolerant networks (DTNs) are a class of emerging networks that are subject to frequent and long-duration partitions. Due to intermittent connectivity, DTNs might be significantly limited in supporting application ...
    • A Comparison of Two Practical Multicast Routing Scheme 

      Calvert, Kenneth L.; Madhavan, Ramesh; Zegura, Ellen W. (Georgia Institute of Technology, 1994)
      Designing an interdomain multicast routing scheme that makes efficient use of network resources while delivering good performance to applications is a significant challenge. A variety of schemes have been proposed, but ...
    • Core Migration for Dynamic Multicast Routing 

      Donahoo, Michael J.; Zegura, Ellen W. (Georgia Institute of Technology, 1995)
      Efficient multicast communication provides one of the best avenues for scaling bandwidth intensive applications. Current multicast routing mechanisms perform well for multicast groups which reach a long-term, steady-state ...
    • Core Selection Methods for Multicast Routing 

      Calvert, Kenneth L.; Zegura, Ellen W.; Donahoo, Michael J. (Georgia Institute of Technology, 1995)
      Multicast routing is an important topic of both theoretical and practical interest. Some recently-proposed multicast routing algorithms involve the designation of one or more network nodes as the "center" of the routing ...
    • Design and Analysis of Schedules for Virtual Network Migration 

      Lo, Samantha; Ammar, Mostafa; Zegura, Ellen (Georgia Institute of Technology, 2012)
      The Internet faces well-known challenges in realizing modifications to the core architecture. To help overcome these limitations, virtual networks run over physical networks and use Internet paths and protocols as ...
    • Distributed Laboratories: A Research Proposal 

      Fujimoto, Richard M.; Schwan, Karsten; Ahamad, Mustaque; Hudson, Scott E.; Limb, J. O. (John O.); Ammar, Mostafa H. (Mostafa Hamed); Ezquerra, Norberto F.; Mukherjee, Amarnath; Potts, Colin; Ramachandran, Umakishore; Zegura, Ellen W. (Georgia Institute of Technology, 1996)
      The continuing merger of computer and communication technologies is leading to a new computing/communications infrastructure of unprecedented magnitude, enabling new applications with broad economic and social impact. Yet, ...
    • Efficient Routing using NIx-Vectors 

      Riley, George F.; Ammar, Mostafa H. (Mostafa Hamed); Zegura, Ellen W. (Georgia Institute of Technology, 2000)
      We introduce the concept if NIx-Vector routing which gives efficient and consistent routing of packets in Internet routers. A NIx-Vector is a compact representation of a routing path, which is small enough to be included ...
    • The Energy-Limited Capacity of Wireless Networks 

      Zhao, Wenrui; Ammar, Mostafa H. (Mostafa Hamed); Zegura, Ellen W. (Georgia Institute of Technology, 2004)
      The performance of large-scale wireless ad hoc networks is often limited by the broadcasting nature of the wireless medium and the inherent node energy constraints. While the impact of the former on network capacity has ...
    • An Evolutionary Framework for AS-Level Internet Topology Modeling 

      Gao, Ruomei; Zegura, Ellen W. (Georgia Institute of Technology, 2001)
      Models for network topology form a crucial component in the analysis of protocols. This paper systematically investigates a variety of evolutionary models for autonomous-system (AS) level Internet topology. ...
    • Fast Packet Classification with a Varying Rule Set 

      Merugu, Shashidhar; Gummalla, Ajay Chandra V.; Sala, Dolors; Zegura, Ellen W. (Georgia Institute of Technology, 2001)
      Multi-dimensional packet classification is increasingly important for applications ranging from fire-walls to traffic accounting. Fast link speeds, the desire to classify with fine granularity, and the need for agility ...
    • Generation and Analysis of Random Graphs to Model Internetworks 

      Thomas, Megan; Zegura, Ellen W. (Georgia Institute of Technology, 1994)
      Graph models are commonly used in studying solutions to internetworking problems. This paper considers several random graph models that have been used to model internetworks, and considers ways to characterize the ...
    • Hashing-Based Traffic Splitting Algorithms for Internet Load Balancing 

      Cao, Zhiruo; Wang, Zheng; Zegura, Ellen W. (Georgia Institute of Technology, 1999)
      Replication of resources is a key technique for improving Internet performance. Effective use of replicated resources requires good load distribution schemes. We study the performance of several hashing schemes for ...
    • Hierarchical Power Management in Disruption Tolerant Networks with Traffic-Aware Optimization 

      Jun, Hyewon; Ammar, Mostafa H. (Mostafa Hamed); Corner, Mark D.; Zegura, Ellen W. (Georgia Institute of Technology, 2006)
      Disruption tolerant networks (DTNs) are wireless mobile networks that are characterized by frequent partitions and long delays. Such networks can be used in highly-challenged environment in which energy resources are ...
    • IC-Cloud: Computation Offloading to an Intermittently-Connected Cloud 

      Shi, Cong; Pandurangan, Pranesh; Ni, Kangqi; Yang, Juyuan; Ammar, Mostafa; Naik, Mayur; Zegura, Ellen (Georgia Institute of Technology, 2013)
      Offloading computation-intensive components of mobile applications to the cloud is of great potential to speedup the execution and reduce the energy consumption for mobile devices. The gain from computation offloading ...
    • Inter-Receiver Fair Multicast Communication over the Internet 

      Jiang, Tianji; Zegura, Ellen W.; Ammar, Mostafa H. (Mostafa Hamed) (Georgia Institute of Technology, 1999)
      Multicast protocols target applications involving a large number of receivers with heterogeneous data reception capabilities.To accommodate heterogeneity, the sender may transmit at multiple rates, requiring ...
    • Interdomain Ingress Traffic Engineering through Optimized AS-Path Prepending 

      Gao, Ruomei; Dovrolis, Constantinos; Zegura, Ellen W. (Georgia Institute of Technology, 2005)
      In Interdomain Ingress Traffic Engineering (INITE), a "target" Autonomous System (AS) aims to control the ingress link through which the traffic of one or more upstream source networks flows to the target network or ...