Now showing items 1-20 of 56

    • 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 ...
    • 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 ...
    • Characterization of Mbone Session Dynamics: Developing and Applying a Measurement Tool 

      Almeroth, Kevin C.; Ammar, Mostafa H. (Mostafa Hamed) (Georgia Institute of Technology, 1995)
      Much of our current understanding of the operational aspects and the network requirements of multicast communication derives from the MBone. As an experimental network that overlays the Internet, the MBone has served as ...
    • The Classroom [Fall 2005] 

      Llewellyn, Donna C.; Weinsheimer, Joyce; Yoganathan, Ajit P.; Girardot, Steven P.; Graham, Samuel, Jr.; Hartley, Dana E.; Ammar, Mostafa H. (Mostafa Hamed); Bozeman, Barry L.; Lyle, Clinton M., Jr. (Georgia Institute of Technology, 2005)
      In this issue: The Path to Becoming a GT Educator; In the CETL Library: Book Reviews; Rhythms of Academic Life: Personal Accounts of Careers in Academic; Life on the Tenure Track: Lessons from the First Year; Q & A: An ...
    • Design and Evaluation of Router-Supported and End-to-End Multicast Receiver-Based Scoping Protocols 

      Clay, Lenitra M.; Ammar, Mostafa H. (Mostafa Hamed) (Georgia Institute of Technology, 1999)
      IP multicasting allows a source to define a multicast group address and receivers can dynamically join and leave this group. Currently the propagation of multicast packets is controlled by two scoping methods: TTL scoping ...
    • 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, ...
    • Distributed Network Simulations Using the Dynamic Simulation Backplane 

      Riley, George F.; Ammar, Mostafa H. (Mostafa Hamed); Fujimoto, Richard M.; Xu, Donghua; Perumalla, Kalyan S. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, Inc., New York, 2001-04)
      Presents an approach for creating distributed, component-based simulations of communication networks by interconnecting models of sub-networks drawn from different network simulation packages. This approach supports the ...
    • 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 ...
    • Efficient Routing Using NIx-Vectors 

      Riley, George F.; Ammar, Mostafa H. (Mostafa Hamed); Zegura, Ellen W. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, Inc., New York, 2001)
      We introduce the concept of Neighbor-Index Vector (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 ...
    • Enabling Large-Scale Multicast Simulation by Reducing Memory Requirements 

      Xu, Donghua; Riley, George F.; Ammar, Mostafa H. (Mostafa Hamed); Fujimoto, Richard M. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, Inc., New York, 2003-06)
      The simulation of large–scale multicast networks often requires a significant amount of memory that can easily exceed the capacity of current computers, both because of the inherently large amount of state necessary to ...
    • 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 ...
    • Evaluating the scalability of aggregation techniques for database replication 

      Ammar, Mostafa H. (Mostafa Hamed) (Georgia Institute of Technology, 1998)
    • Exploiting the Predictability of TCP’s Steady-state Behavior to Speed Up Network Simulation 

      He, Qi; Ammar, Mostafa H. (Mostafa Hamed); Riley, George F.; Fujimoto, Richard M. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, Inc., New York, 2002-10)
      In discrete-event network simulation, a significant portion of resources and computation are dedicated to the creation and processing of packet transmission events. For large-scale network simulations with a large number ...
    • A Generic Framework for Parallelization of Network Simulations 

      Riley, George F.; Fujimoto, Richard M.; Ammar, Mostafa H. (Mostafa Hamed) (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, Inc., New York, 1999-10)
      Discrete event simulation is widely used within the networking community for purposes such as demonstrating the validity of network protocols and architectures. Depending on the level of detail modeled within the simulation, ...
    • A Greedy Approach For Improving Update Processing In Intermittently Synchronized Databases 

      Yee, Wai Gen; Omiecinski, Edward Robert; Navathe, Shamkant B.; Ammar, Mostafa H. (Mostafa Hamed); Donahoo, Michael J.; Malik, Sanjoy (Georgia Institute of Technology, 1999)
      Replication of data on portable computers is a new DBMS technology aimed at catering to a growing population of mobile database users. Clients can download data items such as email, or sales data from a server onto ...
    • 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 ...
    • Implementing Protocols in Java: The Price of Portability 

      Krupczak, Bobby; Ammar, Mostafa H. (Mostafa Hamed) (Georgia Institute of Technology, 1997)
      As the number and variety of Web- and network-based applications continues to increase, so does the need for flexible communication protocols and services to support them. Traditionally, a major impediment to deployment of ...
    • An Improved Leader Election Protocol in Multi-hop Radio Networks 

      Lee, Chungki; Ammar, Mostafa H. (Mostafa Hamed); Burns, James Edward (Georgia Institute of Technology, 1993)
      This paper presents two randomized protocols for the problem of electing a "leader" among a set of nodes in an arbitrary multi-hop radio network. First, a variation of the leader election protocol by Bar-Yehuda et al. ...
    • Improved Randomized Broadcast Protocol in Multi-hop Radio Networks 

      Lee, Chungki; Ammar, Mostafa H. (Mostafa Hamed); Burns, James Edward (Georgia Institute of Technology, 1993)
      This paper presents a suite of randomized broadcast protocols for the problem of broadcasting a message in multi-hop radio networks. The protocols are compared with the randomized broadcast protocol by Bar-Yehuda et ...