预约式两级调度带内全双工接入控制策略研究

Research on Two-level Scheduled In-band Full-duplex Media Access Control Mechanism

带内全双工(in-band full-duplex,IBFD)无线通信允许节点在同一频段上同时进行发送和接收,是提高频谱利用率的有效途径。文中提出一种预约式两级调度全双工(Two-level Scheduled in-band Full-duplex,TSIB-FD)无线接入控制策略,将接入过程划分为信息收集、全双工数据传输和确认阶段,由AP在信息收集阶段感知节点业务及干扰关系生成一级调度方案,数据传输阶段AP根据一级调度方案建立全双工链路,并在数据传输过程中根据业务需求变化进行二次调度,完成数据传输后统一确认。仿真结果表明,文中提出的TSIBFD在确保延时的条件下提升了系统吞吐量,实验表明,最优情况下吞吐量相比Janus可提升38.5%,相比HBPOLL实现了1倍的增长。

In-band full-duplex(IBFD)wireless communicatio n allows the nodes to send and receive simultaneously in the same frequency band,which is an effective way to improve the spectrum utilization rate.This paper proposes a two-level scheduled in-band full-duplex(TSIB-FD)for wireless networks,which divides the access process into three stages:information collection,full-duplex data transmission and acknowledgement.A first-level scheduling scheme is generated by AP in the information collection stage by node business requirements and inter-interference relations.During thefirst-level full-duplex link data transmission,AP can build the second-level scheduling dynamically according to current transmission.ACK is processed after complete bidirectional data transmission.The simulation results show that TSIB-FD has improved the system throughput with a lower delay.Compared with Janus,the throughput can be improved by 38.5%,and compared with HBPOLL,it can be improved by 100%.