太赫兹网络中基于优先级调度的低开销双信道MAC协议

A Low Overhead Dual-channel MAC Protocol Based onPriority Scheduling in Terahertz Networks

针对现有太赫兹通信网络双信道MAC协议存在控制开销冗余和在竞争信道时缺少优先级调度策略等问题,提出了一种太赫兹网络中基于优先级调度的低开销双信道MAC协议(Low Overhead Dual-channel MAC Protocol Based on Priority Scheduling,LO-PSMAC),包含通信距离预判、优先级调度策略的CSMA/CA和精简THz频段MAC帧三种机制,可有效提升信道利用率和整体网络吞吐量,同时减小控制开销和降低数据平均时延。仿真结果表明,所提协议与现有太赫兹双信道MAC协议相比,MAC层吞吐量和信道利用率分别提升了7.14%和14.75%,数据平均时延降低了14.21%。

For the problems of control cost redundancy and lack of priority scheduling strategy in competing channels in existing dual-channel MAC protocols in terahertz communication networks,a Low Overhead Dual-channel MAC Protocol Based on Priority Scheduling in Terahertz Networks(LO-PSMAC)is proposed.LO-PSMAC includes three mechanisms:communication distance prediction,CSMA/CA of priority scheduling policy,and THIN THz band MAC frame.The three mechanisms can effectively improve channel utilization and overall network throughput,and reduce the control cost and average delay.Simulation results show that compared with those of the existing MAC protocols,the MAC layer throughput and channel utilization of the proposed protocol are improved by 7.14%and 14.75%,respectively,and the average data delay is reduced by 14.21%,which demonstrates the effectiveness of the proposed protocol.