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)
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
ORBIT Radio Grid Tested for Evaluation of Next-Generation Wireless Network Protocols
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
Performance analysis of DRAMA: a distributed policy-based system for MANET management
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
Integrated network experimentation for QoS measurements in opaque MANETs
International Journal of Network Management
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The design of QoS mechanisms for wireless networks in general, and mobile ad hoc networks (MANETs) in particular, is a challenging task. The challenges are further compounded when the characteristics of the intermediate network segments are not observable from the originating segment, and as a consequence these segments have to be treated as opaque networks. 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. Testing these QoS mechanisms poses a special technical challenge due to the difficulty of conducting experiments in a MANET environment at a scale larger than a dozen nodes or so. In this paper, we describe a distributed and hybrid testbed that has been deployed for running large-scale 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 alternate 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 non-virtualized one 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.