一种基于预约的无线传感器网络MAC协议

A Reservation-based MAC Protocol for Wireless Sensor Networks

无线传感器网络要求的能量高效,低延时,使得MAC协议的设计充满挑战。近来已经提出了很多基于簇的MAC协议,为减少冲突在簇内部采用TDMA方式来协调簇内各个节点的传输。本文提出了一种在采用簇结构的基础上,使用预约方式来发送数据的R-MAC(Reservation-MAC)协议。当争用节点少的时候,采用随机争用方式来预约数据的发送;在争用节点多的时候,采用时隙争用方式来预约数据的发送。分析表明,R-MAC能够有效的降低能耗和减少延迟。

The requirement of wireless sensor networks, such as energy-efficiency and low-delay, pose a great design challenge for MAC protocol design. Recent studies have proposed many cluster-based MAC protocols in order to reduce collision take TDMA scheme to manage the intra-cluster communication. A cluster similar reservation-based MAC （R-MAC） is proposed. When the contention nodes are small, the random contention way is used to reserve the data transfer. On the contrary, when the contention nodes are many, the slot contention way is used. The analysis shows R-MAC gets better performance in terms of energy consumption and delay.