联合空时需求预留和功率控制的MAC协议

MAC protocol with joint spatial and time reservation and power control

提出了一种应用于移动Ad Hoc网络中的联合空时预留和功率控制MAC协议。它通过对信道时间和空间资源预留更为精确的估计优化了可用的信道资源,提高了信道的空间利用率,降低了碰撞冲突的概率。因为物理层头部采用最低的速率进行传输,把这种时空估计信息嵌在物理层帧头部,可以把信息传播到更多更远的邻节点,减少了碰撞的概率。同时结合功率控制技术对数据包传输功率进行控制,降低了节点的能量消耗。通过仿真与IEEE 802.11 MAC协议进行比较,该协议提高了系统的吞吐量,移动节点功率消耗明显降低,节点的能量利用效率得到提高。

A protocol combining spatial and time reservation with power control Medium Access Control （MAC） protocol in mobile Ad Hoc networks was presented. It could efficiently utilize the available channel resource along with the spatial as well as time dimension, and improve channel spatial reuse through avoiding collision. The proposed protocol embedded the spatial and time reservation requirements in the PHY header, and transmitted them at the lowest data rate to a larger group of neighbors, and thus avoided collisions. By decreasing the transmission power of the data packet, the energy consumption of mobile nodes was decreased. Simulation results indicate that compared to IEEE 802.11 MAC protocol, the proposed protocol can improve the throughput performance and decrease the power consumption greatly and improve the energy utilization of mobile terminals while avoiding collision.