BP-MAC: A High Reliable Backoff Preamble MAC Protocol for Wireless Sensor Networks

BP-MAC: A High Reliable Backoff Preamble MAC Protocol for Wireless Sensor Networks

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Many Media Access Control (MAC) protocols for Wireless Sensor Networks (WSN) use varia-tions of the popular copyright Sense Multiple Access (CSMA) protocol due to its simplicity and its high perfor-mance in low traffic scenarios.However, CSMA does not always represent a good choice for WSNs since typical low power transceivers require a click here significant time to switch between receiving and transmitting and vice versa.Sensor nodes are not able to detect a busy channel during the switching.Thus, the collision proba-bility in WSNs is very high in case of google pixel 7 freedom correlated event-driven traffic.

In this paper we introduce the BP-MAC protocol that uses a backoff preamble with variable length in order to mitigate the effect of Clear Channel As-sessment (CCA) delay.