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Research of Mobility Emulation in wireless network

[Wireless TB Meeting ]. Research of Mobility Emulation in wireless network. Jungsik Yoon jsyoon@nm.gist.ac.kr Networked Media Lab Department of Information and Communication Gwangju Institute of Science and Technology (GIST) 2009. 9. 7. In this talk,.

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Research of Mobility Emulation in wireless network

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  1. [Wireless TB Meeting] Research of Mobility Emulation in wireless network Jungsik Yoon jsyoon@nm.gist.ac.kr Networked Media LabDepartment of Information and CommunicationGwangju Institute of Science and Technology (GIST) 2009. 9. 7

  2. In this talk, • It is planned to develop mobility emulation function in our TB at the third year. • I will introduce previous mobility emulators and its practical usage. • Finally, I will explain HY’s work in OMF and how to adapt that works in our TB (in GMF)

  3. Introduction • Mobility Emulator? • Study the Human mobility or behavior of the modern wireless mobile ad-hoc network (MANET) systems such as a delay (or disruption) tolerant network (DTN) and its application is a challenging task. • Most of Previous research of human mobility was studied using network simulator. To test in real experiment, it requires a lot of investment for management as well as setup cost. • Advantages of emulation for studying of mobility • Multipath fading • Relative path delay • Doppler or frequency shift

  4. Mobility Emulation Through Spatial Switching on a Wireless Grid, WINLAB in proceeding MOBICOM ‘06 • Target environment • The ORBIT indoor testbed, comprising of 128 IEEE 802.11 a/b/g interfaces, attached to 64 stationary nodes, arranged in an 8 by 8 grid • Use video streaming application • Issues • How to emulate real mobility information? • How to develop handoff function for node’s mobility • Purpose of research • CSMA/CA performance as the number of Tx nodes increasing • Inter-contact time & user mobility • WLAN hand-off mechanisms

  5. Cont’ • Input human mobility • Emulated path of a moving nodes. (if distance is large, utilize noise generation system) • Target application is working on virtual machine and it is connected to real node through tunneling in Network layer.

  6. Mobility Emulator for DTN and MANET Applications, HY yoonin proceedingWintech ‘09 • Motivation • tunneling and spatial switching methods are not favorable to study DTN and modern MANET applications because it is hard to emulate the behavior of network stack below IP layer. • On/Off-based mobility emulation method and its implementation that virtually migrates applications over static-grid testbed to mimic the device mobility • System Design • Emulator server is communica-te with each client throughtwired connections

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