Cross-Layer Measurements for a Comprehensive Characterization of Wireless Networks in the Presence of Interference
IEEE Transactions on Instrumentation and Measurement
Assessing the overall performance of wireless communication networks is of key importance for optimal management and planning. With special regard to wireless networks operating in an unlicensed band, evaluating overall performance mainly implies facing the coexistence issues, which are associated with the contemporaneous presence of true and interfering signals at the physical layer. This task is difficult to fulfill only on the basis of single-layer measurements, if not prohibitive; a partial
... hibitive; a partial perspective of network behavior would, in fact, be gained. With this concern, a cross-layer approach is presented hereinafter. It provides for several measurements to be concurrently carried out at different layers through a proper automatic station. It aims to correlate the values of the major physical-layer quantities (e.g., channel power and signal-to-interference ratio) exhibited by those characterizing the key higher layers' parameters (e.g., packet-loss ratio and one-way delay) in the presence of interference. A first step toward a full characterization of how the effects of a problem, which is experienced at the physical layer, propagates along the whole protocol stack, can thus be taken. SA, Italy, on April 16, 1969. He received the M.S. degree (cum laude) in electronic engineering from He is currently involved in research into new digital signal-processing methods for assessing the performance of wireless or wired digital communication systems and apparatuses, testing and troubleshooting communication networks, detecting, measuring, and classifying nonstationary signals, and evaluating uncertainty in indirect measurements. Index Terms-Coexistence issues, cross-layer measurements, interference measurements, one-way-delay (OWD) measurements, packet-loss-ratio (PLR) measurements, timing-jitter measurements, Wi-Fi, wireless networks. Michele Vadursi was born in Naples, Italy, on May 9, 1978. He received the M.S. degree in telecommunication engineering and the Ph.D. degree in electrical engineering from the University of Naples Federico II in 2002 and 2005, respectively. Since 2006, he has been an Assistant Professor with the Dipartimento per le Tecnologie, Università degli Studi di Napoli "Parthenope", Naples. His research activity is focused on RF transmitter testing and troubleshooting, power measurement of RF signals, and performance evaluation in both wired and wireless LANs.