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In a wireless sensor network mobility along with energy efficiency imposes significant challenges for MAC (medium access control) protocol design. An effective MAC protocol for Wireless Sensor Networks must consume less power, avoid collisions, be implemented with small code size and memory requirements. Most of the MAC protocols for wireless sensor networks assume static sensor nodes which decreases network performance in case of mobile sensor nodes. The authors mainly introduce in this paper a Mobility aware and Energy efficient Medium Access Control protocol (MEMAC). MEMAC protocol is hybrid scheme of TDMA and CSMA which informs the sensor node when to activate or deactivate to save energy.
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