Comparison and summary of di?®erent wireless MAC protocols.
Chapter 4 Medium Access Control Protocols for Wireless Sensor Networks 109
The Automatic Rate Control (ARC) technique provides a simple and easyto-
compute scheme to control tra?±c generation and routing in WSNs. The
ZigBee technology is built on the IEEE 802.15.4 standard. Its applications
are similar to the applications targeted by WSNs and expected to become a
dominant industry protocol for WSNs. In Table 3 we compare and summarize
the main features of the MAC protocols discussed in this chapter.
We have also discussed a deficiency of the current implementation of the
Energy Model problem in the NS2 network simulator, and showed an example
where sleep mode in SMAC is not counted for, being treated as idle listening
mode. We modified the NS2 code [20] to solve this problem and provided some
exemplifying simulation results.
As future work for WSNs, more emphasis has to be put on cross-layer designs,
including aspects at di?®erent layers such as physical, MAC, and routing
layers. In order to validate the protocols through simulations, there is a high
need for a reliable sensor network simulator, that correctly accounts for wireless
sensor network characteristics, such as a large number of nodes (e.g.,
hundreds of thousands of sensor nodes) and various energy models. Finally,
Crossbow MICA motes [21]).
References
1.
pp. 102??“116.
2.
(Jul.
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