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On the effectiveness of medium access with predictive collision avoidance

: Saad, Ahmad; Staehle, Barbara; Chen, Yun


Institute of Electrical and Electronics Engineers -IEEE-; IEEE Industrial Electronics Society -IES-:
ETFA 2014, 19th IEEE International Conference on Emerging Technologies and Factory Automation : 16.- 19 September 2014, Barcelona, Spain
Piscataway, NJ: IEEE, 2014
ISBN: 978-1-4799-4846-8
ISBN: 978-1-4799-4845-1
ISBN: 978-1-4799-4844-4
4 S.
International Conference on Emerging Technologies and Factory Automation (ETFA) <19, 2014, Barcelona>
Fraunhofer ESK ()
cognitive Radio; cognitive medium access; carrier sense multiple access; collision avoidance; CSMA / CA; Carrier Sense Multiple Access with Predictive Collision Avoidance; CSMA/PCA; collision avoidance; whitespace prediction; automation; quality of service; QoS; Industrial Connectivity; Wireless Networks

In factory automation where reliable low-delay communication is essential to maintain the required Quality of Service (QoS), efficient medium access schemes play quite an important role. Therefore we propose a centralized cognitive medium access method that utilizes prediction of white spaces to avoid collisions as well as improve utilization of transmission opportunities. Our simulation results show that under idealistic assumptions, CSMA extended by prediction outperforms the classical CSMA/CA by far. We demonstrate that even if the prediction is erroneous to some extent, the proposed algorithm (CSMA/PCA) shows remarkable improvements in terms of successful channel access, average queuing time per packet, as well as efficiency of spectrum utilization.