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[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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[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
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)
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
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
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.
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