A real‐time noise resilient data link layer mechanism for unslotted IEEE 802.15.4 networks
Selçuk Ökdem · International Journal of Communication Systems · 2015
Summary Institute of Electrical and Electronics Engineers (IEEE) 802.15.4 is a protocol operating in media access control and physical layer, and it is commonly used in low‐power and low data‐rate wireless communications. In this paper, we develop a stochastic model for unslotted operations of IEEE 802.15.4 networks. Signal fading is an important factor in mobile communications. According to the level of fading, signal‐to‐noise ratio gets dynamically changing values. Given a pair of nodes communicating to each‐other in a mobile channel, the model calculates frame sizes providing maximum data‐rate of successful IEEE 802.15.4 transmissions. The experimental results in various environments are given in the paper to discuss the success of the model. In the consideration of real‐time operations, the model is improved to be operated in a low‐complexity hardware/software unit. According to experimental results presented in the paper, the proposed model seems to be suitable in mobile environments by achieving high data‐transfer rate for unslotted IEEE 802.15.4 protocol. Copyright © 2015 John Wiley & Sons, Ltd.