基于信道状态感知的多优先级机载战术网络MAC协议

A Multi-Priority Multi-Channel MAC Protocol Based on the Channel Awareness for Airborne Tactical Networks

针对传统航空通信网络媒质接入控制(Medium Access Control, MAC)协议存在端到端时延大、网络容量小、灵活性差、可扩展性不强等问题,为了适应机载战术网络信息传输需求,提出了一种基于信道状态感知的多优先级多信道MAC协议.该协议能够根据信道实时占用状态,控制不同优先级业务接入信道,主要包括多优先级多队列调度机制、分组接入控制机制、自适应退避算法,以及多信道动态分配算法等模块.仿真结果表明,该协议能够为机载战术网络中各类信息传输提供有效的QoS保障,并充分高效利用网络带宽资源.

For the large end-to-end delay, low network capacity, low flexibility and low extensibility existing in the Medium Access Control(MAC) protocols used in the traditional aeronautical communication networks, to meet the requirement of information transmissions in airborne tactical networks, a novel multi-priority multi-channel MAC protocol based on channel awareness is proposed in this paper. The protocol can control the access of packets with different priorities to channels according to the real-time channel occupancy status. It mainly contains the following modules, such as the scheduling mechanism of multi-priority and multi-queue, packets access control mechanism, adaptive backoff algorithm and dynamic channel allocation algorithm. Simulation results show that the protocol can provide effective QoS guarantee for transmissions of various information, and utilize the network bandwidth resources efficiently.