Abstract. The aviation industry forms an important component of the nation's critical infrastructure. By considering the issues involved in protecting the operational aspects of the aviation industry, in conjunction with the introduction of Internet access within an airplane, the authors present the possibility of providing an additional path for the transport of critical content between and airplane and ground stations
The Air Traffic Controller (ATC) is required to maintain a safe and orderly flow of airplanes in any airport. A fairly recent incident at the Los Angeles Airport (LAX) caused a blackout to the entire control tower and resulted in a number of aircrafts being stranded in the air, due to the lack of communication with the ATC. This incident has caused widespread concern in the aircraft community and needs to be addressed so that future occurrences can be avoided. IntroductionAutomatic Dependent Surveillance -Broadcast (ADS-B) is a Global Positioning System (GPS) based air-traffic surveillance technology. The concept behind ADS-B is that an aircraft can automatically broadcast its identification address, GPS derived latitude and longitude, altitude, and the 3-D velocity. This broadcast information from ADS-B can be picked up by the ATC and used to track aircrafts more precisely than with radar. This concept can be extended to involve other aircrafts in the same airspace to be equipped with an ADS-B receiver, hence allowing them to listen to these broadcasts and be able to know the location of others aircrafts. The system proposed in this paper is intended to serve as a supplementary mechanism to existing air-ground systems and can be extended to operate on its own in case of unforeseen circumstances such as loss of power to the ATC.
a transmission control scheme plays an important role in determining a protocol's performance. Protocol performance can be measured based on a variety of factors. In this paper we compared four protocols that are compatible with EPC C1G2 standard using four units of performance, namely System Efficiency, Time System Efficiency, Total Number of Slots and Total Time.The results show not only the strengths and weaknesses of the protocols measured, but also highlight the importance of evaluating all relevant performance factors when comparing protocols as opposed to weighing performance using one or two units.
in the world where automating jobs is becoming a norm it is no surprise that the interest in RFID networks has grown exponentially. With RFID technology companies around the world can reduce their workforce and grow their business. However, this technology is not at that maturity point yet. In order for a cart full of groceries to go through an unmanned checkout lane, it is crucial that all of the tagged items are read and processed with 100% reliability. Also the process time needs to be short so that customers complete their purchases as fast as possible. In order to achieve time and reliability, several transmission control protocols have been devised. Out of these, the transmission control protocol that is most popular with RFID equipment manufacturers is EPCglobal's Class 1 Gen2. The transmission control in EPC C1G2 is achieved by framed slotted ALOHA where tags pick a random slot from the choices given by the reader and when their turn comes, they backscatter their information. This can lead to many empty slots and many collision slots apart from the successful slot. The time spent on these non-successful slots is studied in [4] and in this paper we extended the concept provided in [4] and propose a new method that scans for the empty and collided slots before attempting to read tags.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.