一种多信道的分簇式短波令牌协议

传统的短波令牌协议（HFTP）调度方式单一，在没有数据传送时，信道资源会被各节点间的令牌传递所占用，且令牌在通信质量较差时易丢失。基于此，提出一种多信道的分簇式短波令牌协议（CHFTP），通过以通信质量评估为标准的分簇算法和基于预约的动态令牌调度，减小了令牌丢失的概率和令牌传递、处理的开销，并给出了仿真分析。仿真结果表明，该协议的端到端平均时延和网络吞吐量明显优于短波令牌协议，CHFTP的平均时延最多可减少75%，网络吞吐量最多可增加66.7%，适合在短波通信网络中使用。

A cluster HF token protocol based on multi-channel

The scheduling mode of traditional High Frequency Token Protocol(HFTP) is inflexible,whose channel resource would be occupied by the token passing between nodes when there is no data to send,and it is easy to lose the token if the communication quality is not good. A Cluster High Frequency Token Protocol(CHFTP) based on multi-channel is introduced.By using the cluster algorithm based on the assess of communication quality and the dynamic token scheduling through order,the probability of token loss as well as the overhead of token passing and processing,are both decreased. The simulation results show that the end-to-end average delay and the network throughput of CHFTP are better than those of HFTP obviously,and mostly the delay can be reduced by 75%,the throughput can be increased by 66.7%.The protocol is suitable for the High Frequency(HF) communication network.