Mr. Jordi Sabater Profile

Jordi Sabater

at Airbus Defence and Space

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Proceedings Article | 17 May 2007 Paper

Low-power low-latency MAC protocol for aeronautical applications

Jordi Sabater, Martin Kluge, Sergio Bovelli, Josef Schalk

Proceedings Volume 6589, 658904 (2007) https://doi.org/10.1117/12.724122

KEYWORDS: Sensors, Switching, Solar concentrators, Computer security, Stars, Standards development, Receivers, Network security, Environmental sensing, Transceivers

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This paper describes asynchronous MAC (Medium Access Control) strategies based on the IEEE 802.15.4 physical layer for wireless aeronautical applications where low power and low latency are important requirements as well as security and data integrity. Sensor data is acquired and collected on request, by means of a mobile device, and later stored in a centralized database. In order to have the smallest power consumption the wireless sensor has to remain in deep sleep mode as long as possible and wake up and listen periodically for RF activity. If its unique ID is mentioned in the destination address field, the complete frame is received, processed and replied if necessary. If the detected packet is addressed to another sensor the reception will stop immediately and the wireless sensor will go into deep sleep mode again. Listening instead of sending actively does not 'pollute' the already crowded 2.45GHz spectrum, reduces collisions and increases security. The mobile data concentrator can not be synchronized with all the sensors installed in a distributed environment, therefore smart asynchronous data transmission strategies are needed to reduce latencies and increase throughput. For the considered application, sensors are independent of each other, simply share the medium and together with the data concentrator are organized in a star network topology. The centre of the star is the concentrator which is rarely in range. It coordinates and activates the wireless sensor nodes to collect the measured data.

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