高效快速融合的双LAN太赫兹无线局域网MAC协议

为了使两个独立运行的太赫兹无线局域网能快速完成协调融合以及提升融合后网络的性能，提出一种高效快速融合的双LAN太赫兹无线局域网MAC协议——EFC-MAC(efficient and fast convergence of MAC protocols)。首先，针对现有网桥节点选举机制不完善以及网络协调融合机制存在不足之处的问题，提出了在第一个网间节点进行申请入网时就开始进行网桥节点的选举，并将选举结果在下一超帧的BP时段进行通告的机制，并根据网络是否已经完成了协调融合而决定是否申请CTA以转发heartbeat消息的机制，使网络能高效快速完成融合；然后，针对网间节点申请公共时隙方式不够灵活的问题，提出根据P-CTAP所剩时隙量来动态申请CTA的机制，提升了网络的性能；最后，针对网桥节点切换机制尚不明确的问题，提出了采用一个CAP时段长度完成网桥节点切换的机制。仿真结果表明，所提协议有效提高了网络吞吐量，提升了时隙利用率以及降低了数据传输时延。

Efficient and fast convergence of dual-LAN terahertz wireless LAN MAC protocol

In order to make two independently operated terahertz wireless LANs quickly complete coordinated convergence and improve the performance of the converged network, this paper proposed an efficient and fast convergence of MAC protocols(EFC-MAC). Firstly, in view of the imperfection of the existing bridge node election mechanism and the shortcomings of the network coordination and convergence mechanism, this paper proposed a mechanism to start the election of bridge nodes when the first network node applied for network access, and announced the election results in the BP period of the next superframe, and a mechanism to decide whether to apply for CTA to forward heartbeat messages according to whether the network had completed coordinated convergence, so that the network could complete convergence efficiently and quickly. Then, aiming at the problem that the application method of public time slots by network nodes was not flexible enough, this paper proposed a mechanism to dynamically apply for CTA according to the amount of time slot remaining in P-CTAP, which improved the performance of the network. Finally, aiming at the problem that the bridge node switching mechanism was not clear, this paper proposed a mechanism to complete the bridge node switching by using a CAP period length. Simulation results show that the proposed protocol can effectively improve network throughput, improve slot utilization and reduce data transmission delay.