Abstract: Aiming at the problem that Link-16data link can not satisfy the requirements of sensitive information with reliable transmission when precision strike of moving target is needed,this paper proposed a MAC protocol based on multi-channel priority Statistics (MCPS)．MCPS protocol uses different priorities thresholds and channel occupancy statistic value to determine whether data packets should be sent．Thereby,the method greatly reduces channel conflict,guarantees a data transmission in real-time at the same．The simulation results show that the Link-16data delay increases sharply with an increasing nodes,but MCPS protocol End to End Delay constants in 3~4ms.As network traffic increases,Link-16system can’t carry the heavy traffic and lead to severe packet loss．But MCPS can satisfy protocol requirements of high-traffic network and keep the success rate of send is not less than 95% at first time.

Key words: Tactical data link,Ad hoc,MAC,Simulation