一种面向飞行自组网应用的动态TDMA协议

A dynamic TDMA protocol for flying ad-hoc network applications

在集群无人机所组成的飞行自组网中,存在着不同的业务类型,各个节点也有着不同的任务分工和传输需求,因此便要求其网络协议可以根据网络节点和传输业务特性进行差别服务。针对此问题设计了一种面向飞行自组网应用的动态时分多址接入TDMA(time division multiple access)协议,该协议采用了动态分配策略,在节点申请空闲时隙阶段引入节点优先级判断机制,实现了高优先级节点优先接入信道的目的。此外,该协议通过采取时隙冲突避免和时隙冲突检测两种方式来快速高效的解决时隙冲突问题。仿真实验表明,在信道资源一定的情况下,该协议可最大限度的保证了高优先级节点的传输需求,使高优先级节点具有更高的信道接入权、更低的接入时延和时延抖动。

In the flying ad hoc network composed of clustered unmanned aerial vehicles(UAVs), there are various service types, and each UAV also has virous tasks and transmission requirements. Therefore, its network protocol is required to provide differentiated services according to the characteristics of network nodes and transmission services. Aiming at this problem, a dynamic time division multiple access protocol(TDMA) protocol for flying ad hoc network applications is proposed. The protocol uses a dynamic allocation strategy and introduces node priorities during the process of node’s application for idle time slots. The mechanism realizes the purpose of prioritized access to the channel by high-priority nodes. In addition, this protocol resolves the problem of time slot conflicts quickly and efficiently by adopting two methods, time slot conflict avoidance and time slot conflict detection. Simulation experiments show that under the condition of certain channel resources, this protocol can guarantee the transmission demand of high-priority nodes to the maximum, so that high-priority nodes have higher channel access rights, lower access delay and smaller delay jitter.