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In view of the problem that existing Media Access Control(MAC) protocols can not pro-vide real-time monitor on network conditions,this paper puts forward a new MAC protocol- Predict and Feedback MAC(PFMAC) which can predict the channel’s congestion level reasonably.The dominant idea of the new scheme is to record the channel’s busy or idle situation in the backoff stage by sending Sensor Nodes(SNs),and according to the congestion level every SN can change the contention window adaptively when send packets successfully to minimize collisions,saving energy and channel resources.The result of simulation shows that compared with other MAC protocols,the PFMAC protocol can improve network throughput and reduce energy consumption in high speed network en-vironment.
In view of the problem that existing Media Access Control (MAC) protocols can not pro-vide real-time monitor on network conditions, this paper puts forward a new MAC protocol- Predict and Feedback MAC (PFMAC) which can predict the channel’s congestion level reasonably.The dominant idea of the new scheme is to record the channel’s busy or idle situation in the backoff stage by sending Sensor Nodes (SNs), and according to the congestion level every SN can change the contention window adaptively when send packets successfully to minimize collisions, saving energy and channel resources. The result of simulation shows that compared with other MAC protocols, the PFMAC protocol can improve network throughput and reduce energy consumption in high speed network en-vironment.