太赫兹无线局域网MAC协议优化设计

Optimal Design of MAC Protocols for Terahertz Wireless Local Area Networks

针对现有太赫兹无线网络MAC(Medium Access Control)协议中存在的无线局域网场景下原有波束赋形方案不适用、关联请求时段在新入网节点数量受限情况下时隙利用率低,以及网络流量较大时扇区号靠后的节点一直无法获得时隙导致时延陡增的情况,提出了一种适用于无线局域网的高效低时延太赫兹MAC协议(High Efficiency and Low Latency Terahertz MAC,HELL-MAC)。该协议利用中心控制节点与普通节点间的信息交互减少了不必要的波束赋形过程,采用机会性复用关联S-CAP(Sub-channel Access Period)机制提高了时隙利用率,采用公平时隙分配机制提高了时隙分配的公平性,从而减少了波束赋形时间,降低了平均端到端时延,提高了信道利用率。

In response to the situation that the original beam assignment scheme is not applicable in the Medium Access Control(MAC)protocol of terahertz wireless networks,the time slot utilization is low in the case of the limited number of new nodes in the association request period,and the nodes with the lower sector number have been unable to obtain time slots when the network traffic is large,resulting in a steep increase in latency,an high efficiency and low latency terahertz MAC protocol(HELL-MAC)for wireless local area network(LAN)is proposed.The protocol reduces the unnecessary beam assignment process by using the information interaction between the central control node and the common nodes,and improves the time slot utilization by using the opportunistic multiplexing association sub-channel access period(S-CAP)mechanism to improve the time slot utilization,and the fair time slot allocation mechanism to improve the fairness of time slot allocation,thus reducing the beamforming time,decreasing the average end-to-end delay,and improving the channel utilization.