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Advisor(s)
Abstract(s)
The IEEE 802.15.4/Zigbee protocols are a promising technology for Wireless
Sensor Networks (WSNs). This paper shares our experience on the implementation and
use of these protocols and related technologies in WSNs. We present problems and
challenges we have been facing in implementing an IEEE 802.15.4/ZigBee stack for
TinyOS in a two-folded perspective: IEEE 802.15.4/ZigBee protocol standards
limitations (ambiguities and open issues) and technological limitations (hardware and
software). Concerning the former, we address challenges for building scalable and
synchronized multi-cluster ZigBee networks, providing a trade-off between timeliness
and energy-efficiency. On the latter issue, we highlight implementation problems in terms
of hardware, timer handling and operating system limitations. We also report on our
experience from experimental test-beds, namely on physical layer aspects such as
coexistence problems between IEEE 802.15.4 and 802.11 radio channels.
Description
Keywords
Wireless sensor networks ZigBee IEEE 802.15.4 TinyOS