定向自组网中基于报文多时延等级的发送端调度算法

A Transmitter Scheduling Algorithm Based on Multi-delay of Packets in Ad Hoc Networks with Directional Antennas

面向接收机冲突的多址接入(ROMA)是一种高效的适用于多波束自适应阵列天线的调度协议,但它无法保证具有不同时延要求的报文传输的服务质量。针对此问题,在原始ROMA的基础上提出了一种多时延限制的调度算法(MDRS)。通过在调度接入过程中插入子时隙,比较发送端报文时延信息,调度发送节点的传输顺序,使得时延限制更严格的报文优先发送,从而提高了不同时延等级的报文的传输成功率。最后,通过仿真验证了MDRS的性能:与原始ROMA相比,所提算法在多时延限制的发送端调度中表现出了更好的吞吐量和传输成功率。

Receiver-oriented Multiple Access Scheduling(ROMA)is an efficient scheduling Media Access Control(MAC)protocol that utilizes multi-beam adaptive array(MBAA).However,it can't guarantee the quality of service of packet transmission with different delay requirements.In order to solve the problem,a Multi-delay Restriction Scheduling(MDRS)algorithm is proposed based on original ROMA.By inserting sub-slots in scheduling access process and comparing the delay information of packets of sender,the transmission order of sender is scheduled,so that the packet with more stringent delay restriction can be preferentially sent.Finally,the performance of MDRS has been verified by simulation.Compared with original ROMA,the proposed algorithm shows better throughput and transmission success rate in scheduling with multi-delay restriction.