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Wireless sensor network is becoming an attractive field in wireless network research community. The ability of network structure to maximize network lifetime is among the hot topic due to limitation of resources such as energy, processing and memory, in sensor network architecture itself. Medium Access layer (MAC) with Time Division Multiple Access (TDMA) based architecture provides greater advantages over other designs, such as contention-based and frequency division multiple access, in terms of minimizing the problems that normally appear in wireless medium access including collision, overhearing, idle listening, and over emitting. Overcoming these problems will prolong a network lifetime. This paper will outline several problems in wireless sensor network and describes several TDMA-based MAC protocols proposed for wireless sensor networks while highlighting their strengths and weaknesses.
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