高时隙利用率太赫兹无线个域网公平接入协议

High-slot-utilization and fair access protocol for terahertz wireless personal area networks

针对现有太赫兹无线个域网接入协议时隙利用率偏低的问题,提出了一种高时隙利用率的太赫兹无线个域网接入协议—HSU-AP。HSU-AP通过自适应取消随机接入时段机制增加数据传输时间,采用基于请求量的有序公平时隙分配机制使可分配时隙不再剩余,并且在采用低时延帧聚合机制时利用子帧逆向聚合机制减少子帧重传个数,从而达到提高时隙资源利用率、提升网络吞吐量的效果。理论分析验证了HSU-AP协议的有效性;仿真结果表明,相较于高效公平的媒体存取控制(high efficiency fairness-media access control,HEF-MAC)等现有典型太赫兹无线个域网接入协议,HSU-AP协议的时隙利用率至少提高28.02%,MAC层吞吐量则增加了26.95%以上。

Aimed at the problems currently in access protocols for terahertz wireless personal area networks （T-WPANs） that slot utilization is relatively low, a high slot utilization access protocol for T-WPANs, HSU- AP, is proposed. Through the scheme, adaptively cancelling contention access period, to increase the data transmission time, the scheme, allocated method of time slot orderly and equally, to avoid channel resources surplus, and the scheme, aggregating a sub-frame in backward way, to reduce the number of retransmission, proposed algorithm achieves the effect of increasing network throughput and improving channel utilization. Theoretical analysis verifies the effectiveness o{ HSU-AP. Simulation results show that compared with high efficiency fairnessmedia access control （HEF-MAC）, HSU-AP increases the network throughput in MAC layer 26.95%, and improves channel utilization 28.02% in the case of network saturation.