標題: Accurate Analysis of IEEE 802.15.4 Slotted CSMA/CA over a Real-Time Wireless Sensor Network
作者: Huang, Wen-Tzeng
Lin, Jing-Ting
Chen, Chin-Hsing
Chang, Yuan-Jen
Chen, You-Yin
電控工程研究所
Institute of Electrical and Control Engineering
關鍵字: Real-time;wireless sensor network;collision;IEEE 802.15.4;CSMA/CA
公開日期: 2010
摘要: 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.
URI: http://hdl.handle.net/11536/136511
ISBN: 978-3-642-11527-1
ISSN: 1867-8211
期刊: SENSOR SYSTEMS AND SOFTWARE
Volume: 24
起始頁: 98
結束頁: +
Appears in Collections:Conferences Paper