Token-based multiple access technique in High Frequency ground-to-air IP network

As High Frequency token protocol (HFTP) doesn´t take the air node into consideration, a new High Frequency token protocol with reserve (HFTP-R) for multiple access (MAC) layer of the High Frequency (HF) ground-to-air IP network is put forward and its access and control process is described. HFTP-R lets air node join in the cluster organized by ground node randomly during initialization period, meanwhile the air node sends reserve data through reserve channel and gets the token to access channel, which doesn´t need to keep the logical ring closed between the air and ground. At last, the simulation framework of HFTP-R is developed by OPNET. Simulation results show that, HFTP-R can finish network initialization faster, offer better real-time quality, higher network throughput and success ratio of data transmission, and has strong robustness, which meets the requirement.