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Efficient operation of wireless networks has always been a difficult task due to the inherent broadcast nature of the wireless medium. Transmission by a user can cause interference for its neighbors. If two neighboring users transmit at the same time, the Signal-to- Interference -plus- Noise Ratio (SINR) of the users' links could go below the required SINR for the successful decoding of data packets at their corresponding receivers. In this case, the authors say that their messages collide with each other. Therefore, multiple users can transmit at the same time provided that they do not cause significant interference for each other.
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