动态服务质量的多信道媒体接入控制传输机制

摘要

针对航空自组网在高负载下的服务质量及时延问题,提出一种动态服务质量的多信道媒体接入控制传输机制.以多信道检测统计为平台,结合优先级机制,通过在高负载网络中适当遏制低优先级业务,并且进行网络流量优化,保证高优先级业务的低时延发送;同时利用流量预测模型估计网络流量,通过粒子群优化算法进行优化,寻找合适的优先级门限值,确保高优先级业务接入率.通过计算机仿真可知,所设计的动态服务质量的多信道媒体接入控制传输机制,可在大负载网络中动态控制信道的接入,保持良好的网络吞吐量,其高优先级业务接入率达到99%以上,能有效解决航空数据链网络高业务量导致的服务质量及时延问题.%Aiming at the QoS(quality of service)and delay problems of aeronautic Ad Hoc network under high load, a DQM transmission mechanism was proposed(dynamic QoS of multi-channel MAC).On the basis of multi-channel detection statistics and the priority mechanism,the DQM optimized the network traffic via shutting down the low-priority traffic in the high-load network timely to ensure the low-latency transmission of high-priority traffic.The traffic prediction model was used to estimate the network traffic.Combined the particle swarm optimization algorithm, the DQM could find the optimal priority threshold and guarantee the access rate of high-priority services.Simulation results prove that the DQM maintains an optimized network traffic by adaptively controlling channel access in high-load network.Thus,the access rate of high-priority services reaches above 99%, which helps to solve the QoS and latency issues associated with high traffic in the air data link.