標題: Real Traffic Replay over WLAN with Environment Emulation
作者: Ku, Chia-Yu
Lin, Ying-Dar
Lai, Yuan-Cheng
Li, Pei-Hsuan
Lin, Kate Ching-Ju
資訊工程學系
Department of Computer Science
關鍵字: traffic replay;real traffic;WLAN;wireless network;environment emulation
公開日期: 2012
摘要: Real traffic replay is one of the solutions used to test network devices over complicated scenarios. Packet traces captured in a real environment hold more details than any mathematical models. However, the lack of packet-replay control and environment emulation might highly affect traffic behaviors, especially in wireless networks. Real traffic replay in wireless networks requires packet-replay control to manage the interactions with the device under test (DUT), and coordinately reproduces environment effects, such as fading, noise, and interference. In this work, we propose a method, called Event-driven Automata-synchronized Replay (EAR), to address real traffic replay over WLAN. EAR transforms the captured packet trace into a sequence of events that follow the IEEE 802.11 protocol. The three-level automata are applied to achieve packet-replay control and synchronize the environment effects in traffic replay with the packets and signals captured in a real environment. We propose a quantitative metric, called the event reproduction ratio (ERR), to evaluate the effectiveness of traffic replay. Our software implementation on the Linux-based system demonstrates that EAR achieves the ERR of 95.9% and 92.45% over the DUT-dependent traffic and fading environments, respectively. Under the same condition, the straight-forward replay can only produce the ERR of 20.6% and 0%, respectively.
URI: http://hdl.handle.net/11536/22881
ISBN: 978-1-4673-0437-5
ISSN: 1525-3511
期刊: 2012 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC)
顯示於類別:會議論文