Research Article
Accurate Analysis of IEEE 802.15.4 Slotted CSMA/CA over a Real-Time Wireless Sensor Network
@INPROCEEDINGS{10.1007/978-3-642-11528-8_8, author={Wen-Tzeng Huang and Jing-Ting Lin and Chin-Hsing Chen and Yuan-Jen Chang and You-Yin Chen}, title={Accurate Analysis of IEEE 802.15.4 Slotted CSMA/CA over a Real-Time Wireless Sensor Network}, proceedings={Sensor Systems and Software. First International ICST Conference, S-CUBE 2009, Pisa, Italy, September 7-9, 2009, Revised Selected Papers}, proceedings_a={S-CUBE}, year={2012}, month={5}, keywords={Real-time wireless sensor network collision IEEE 802.15.4 CSMA/CA}, doi={10.1007/978-3-642-11528-8_8} }- Wen-Tzeng Huang
Jing-Ting Lin
Chin-Hsing Chen
Yuan-Jen Chang
You-Yin Chen
Year: 2012
Accurate Analysis of IEEE 802.15.4 Slotted CSMA/CA over a Real-Time Wireless Sensor Network
S-CUBE
Springer
DOI: 10.1007/978-3-642-11528-8_8
Abstract
Here, we present the collision probability of the IEEE 802.15.4 slotted Carrier Sense Multiple Access/Collision Avoidance (CSMA/CA) mechanism over a real-time wireless sensor network (RT-WSN), also called a synchronous network system. The “backoff,” the random delay of CSMA/CA, can be used to create a probability model and to determine the average packet delay over RT-WSN. The proposed theoretical analysis model was nearly consistent with the simulation and with experimental results. This suggests that the slotted CSMA/CA mechanism cannot be applied effectively to RT-WSN because it cannot avoid a high collision rate with RT-WSN application requirements and, therefore, may waste a great deal of system bandwidth. We found that the packet collision rate increased up to 731% compared to an ideal model with more than 10 users within an RT-WSN. Without improvements in methodology, the high collision rate makes this slotted CSMA/CA mechanism unsuitable for RT-WSN applications.
