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针对航空移动通信中飞机内移动终端与地面基站端到端通信的高随机误码和突发误码的特点,在TCP网络编码TCP/NC(Network Coding)的基础上提出了一种具有丢失感知机制的网络编码方法 TCP/NCLA(LossAware),该方法使接收端可以感知到编码包的丢失,并在返回ACK时通知发送端发送冗余编码包,从而确保冗余编码包的有效性。新方法能够适应航空移动通信高误码和突发误码的特点,大大提高端到端的吞吐量,提高约21.24%,并且较TCP/NC协议降低了端到端的投递时延,降低约25.48%。并在NS2仿真环境下对改进算法进行了仿真,仿真结果表明了新编码算法的有效性。
Aiming at the characteristics of high random error and burst error of end-to-end communication between mobile terminal and terrestrial base station in aeronautical mobile communication, this paper proposes a new scheme with loss perception based on TCP / NC (Network Coding) Mechanism of network coding method TCP / NCLA (LossAware), the method allows the receiving end can perceive the loss of encoded packets, and sends an ACK to notify the sending end to send redundant encoded packets, so as to ensure the validity of redundant encoded packets. The new method can adapt to the characteristics of high bit error rate and burst error of aeronautical mobile communication, greatly improve the end-to-end throughput, increase about 21.24%, and reduce the end-to-end delivery delay compared with TCP / NC protocol, reducing about 25.48% . The improved algorithm is simulated in NS2 simulation environment. The simulation results show the effectiveness of the new algorithm.