摘要
基于时分多址(TDMA)的时隙分配算法能够提供很好的无线资源利用率,特别是在高负载的环境下。提出了一种适于Ad hoc基于TDMA的无冲突动态分布式时隙分配算法,通过动态改变帧长来控制未用时隙的过量增长,提高了系统吞吐量。该算法通过设置帧长为时隙2的次方,使其在不同帧长的节点中无冲突地包传输。节点间的同步采用本地同步方式。仿真结果表明该算法与IEEE 802.11相比提高了系统吞吐量并降低了端-端延迟。
TDMA-based slot assignment algorithm can provide a good utilization of the radio resources, especially at high input loads environment. A TDMA-based collision-avoid distributed dynamic slot assignment algorithm is proposed for mobile Ad hoe networks. It improves the throughput, which controls the excessive increase of unassigned slots by changing the fame length dynamically. By setting fame length as a power of 2 slots, this algorithm provides the collision-avoid packet transmission among nodes with different frame length. Synchronization of nodes adopt local synchronization mode. The simulation results show that this proposed algorithm im- proves the throughput and decrease end-to-end delay as compared with 1EEE 802.11.
出处
《计算机工程与设计》
CSCD
北大核心
2007年第19期4667-4669,4712,共4页
Computer Engineering and Design
