Multiple operating systems on one processor complex
IBM Systems Journal
A measurement-based admission control algorithm for integrated service packet networks
IEEE/ACM Transactions on Networking (TON)
A framework for robust measurement-based admission control
IEEE/ACM Transactions on Networking (TON)
Proceedings of the seventeenth ACM symposium on Operating systems principles
EMWIN:: emulating a mobile wireless network using a wired network
WOWMOM '02 Proceedings of the 5th ACM international workshop on Wireless mobile multimedia
Xen and the art of virtualization
SOSP '03 Proceedings of the nineteenth ACM symposium on Operating systems principles
Integrated Network Experimentation using Simulation and Emulation
TRIDENTCOM '05 Proceedings of the First International Conference on Testbeds and Research Infrastructures for the DEvelopment of NeTworks and COMmunities
An integrated experimental environment for distributed systems and networks
OSDI '02 Proceedings of the 5th symposium on Operating systems design and implementationCopyright restrictions prevent ACM from being able to make the PDFs for this conference available for downloading
WHYNET: a hybrid testbed for large-scale, heterogeneous and adaptive wireless networks
WiNTECH '06 Proceedings of the 1st international workshop on Wireless network testbeds, experimental evaluation & characterization
Large-scale virtualization in the Emulab network testbed
ATC'08 USENIX 2008 Annual Technical Conference on Annual Technical Conference
Hybrid testbeds for QoS management in opaque MANETS
Proceedings of the 4th Annual International Conference on Wireless Internet
VM/370: a study of multiplicity and usefulness
IBM Systems Journal
Performance analysis of DRAMA: a distributed policy-based system for MANET management
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
QOS mechanisms for opaque MANETs
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
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Integrated network experimentation often combines real nodes with simulated ones, each modeling different portions of the topology, in the same experimental run. They enable new validation techniques and larger experiments than obtainable using real elements alone. Integrated experiments can be particularly useful in testing and validating QoS mechanisms for mobile ad hoc networks (MANETs), when the characteristics of the intermediate wireless network segments are not observable from the end segments, and as a consequence these intermediate segments have to be treated as opaque networks; and also when there is a need to conduct experiments in a real MANET environment at a scale larger than just a few nodes. End-to-end QoS assurance for such opaque networks, consisting of admission control and quality adjustment, can be based on techniques for dynamically measuring throughput representing the state of these networks. In this paper, we describe a distributed and hybrid testbed that has been deployed for running large-scale integrated experiments to demonstrate the efficacy of a measurement-based QoS solution. The infrastructure for the testbed provides an integrated platform consisting of real nodes running the actual software under test, augmented with a simulated network environment. We define a set of metrics and run experiments to evaluate the effectiveness of the QoS solution as well the performance of the deployed testbed. We propose an alternative architecture that employs a Xen-based virtualization of the real nodes from the deployed testbed. We compare the performances of the virtualized architecture with the deployed architecture vis-à-vis latency and resource utilization. Our goal is to establish benchmarks for running large-scale experiments on performance and QoS measurements in virtualized environments.