基于信道状态判决的随机接入协议退避算法

Backoff algorithm for random access protocol based on channel state decision

针对二进制退避(binary exponential backoff, BEB)算法存在的“饥饿效应”及其与数据链网络作战场景不匹配的问题,通过对现有信道状态判决方法进行改进,结合数据链网络的作战应用场景,提出了基于信道状态判决的退避算法,使退避窗口的设置与节点数据的优先级以及当前信道负载密切相关。对系统的吞吐量和端到端时延进行了理论分析和仿真验证,通过分析仿真结果可知,无论是在系统吞吐量或是在端到端时延方面,所提算法的性能明显优于现有退避算法,保证了高优先级数据链信息发送的实时性。

Aimming at the“starvation effect”of the binary exponential backoff(BEB)algorithm and its problem of mismatch with data link network combat scenarios,a backoff algorithm based on channel state decision is proposed by improving the existed method of channel state decision with the consideration of data link network’s combat and application,the backoff window setting was closely related to the data priority and the current channel load.The system throughout and end-to-end delay are theoretically analyzed and simulated.The simulation result shows that the performance of system throughout and end-to-end delay is better than the current backoff algorithm.The high priority data link information can be transmitted in-time.