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: | + |
顯示於類別: | 會議論文 |