Fault Detection, Isolation, and Diagnosis in Multihop Wireless Networks
Lili Qiu, Paramvir Bahl, Ananth Rao, Lidong Zhou · 2004
Network management in multihop wireless networks is key to efficient and reliable network operation. In this paper, we focus on a part of the general network management problem, namely fault detection, isolation, and diagnosis. We propose a system that employs online trace-driven simulation as a diagnostic tool for detecting faults and performing root cause analysis. We apply our system to diagnose faults such as packet dropping, link congestion, MAC misbehavior, and external noise, and show that it yields reasonably accurate results. In addition, we show that our system can be used to evaluate alternative network and node configurations to improve performance of on-going long-lived flows. Moreover, our technique is general enough to be applied in other wireless and wireline network management system.