5601
A Comprehensive Analysis of Low-Power Operation for Beacon-Enabled IEEE 802.15.4 Wireless Networks
Yu-Kai Huang, Student Member, IEEE, Ai-Chun Pang, Senior Member, IEEE, and Hui-Nien Hung
Abstract—ZigBee, a unique communication standard designed for low-rate wireless personal area networks, has extremely low complexity, cost, and power consumption for wireless connectivity of inexpensive, portable, and moving devices. ZigBee uses the IEEE 802.15.4 standard as its communication protocol for medium access control (MAC) layer and physical (PHY) layer. The IEEE 802.15.4 MAC layer achieves duty-cycle operations by setting two system parameters, ���������������������������� (����) and ������������������ ������������������ (����), to achieve low power consumption for ZigBee devices. This study comprehensively analyzes IEEE 802.15.4 duty-cycle operation. Specifically, a novel analytical model that accommodates a general traffic distribution is developed. An NS-2 based simulation model, which is validated by the developed analytical model is also proposed. Through the experiments conducted by the analytical and simulation models, some important performance-evaluation insights are gained that can be used as guidelines for future low-power ZigBee network deployment. Index Terms—IEEE 802.15.4, ZigBee, low-power operation, performance analysis.
monitoring, and health care [34]. In ZigBee, IEEE 802.15.4 is utilized as the communication protocol for the medium access control (MAC) layer and physical (PHY) layer [2], and supports low data-rate (i.e., 20kbps, 40kbps, and 250kbps). Such low transmission rate and low-cost characteristics make ZigBee suitable for wireless systems comprising unsupervised groups of devices in houses, factories and offices. To facilitate ZigBee network deployment, most devices are unplugged, and rather operated by batteries. Additionally, the target environments in