动态TDMA时隙分配算法在数据链中的仿真

Modeling of TDMA-based Dynamic Slot Assignment Algorithm for Data Link

固定TDMA分配算法能够保证节点数据发送的公平性,但不可能针对当前业务和网络状态进行时隙预留分配,很难实现差别服务和提供支持QoS(服务质量)的机制。因此提出一种适用于TTNT(战术瞄准网络技术)数据链通信系统的动态TDMA时隙分配算法,在高负载的网络环境下,这种算法加入了优先级机制并根据业务量轻重对各节点采取不同的发送策略,对时隙有较高利用率,提高了Ad Hoc(自组织网)网络系统吞吐量。在OPNET网络仿真平台上进行了仿真验证,仿真结果表明该算法在吞吐量和时延方面都优于固定TDMA算法。

Fixed TDMA assignment algorithm could guarantee the fairness of the traffic of every node,but it is impossible to implement slot allocation for the current state of traffic and the network,and difficult to achieve service differentiation and provide mechanisms in support of QoS.So a dynamic TDMA algorithm is proposed for TTNT data link.This TDMA-based slot assignment algorithm,with the addition of priority contention mechanism,could improve the throughput of Ad Hoc network and provide a good utilization of the radio resource,especially in high input loads environment.Simulation on the OPNET network simulation platform shows that the dynamical TDMA algorithm is better than the fixed TDMA in terms of throughput and delay.