一种联合功率域的SPMA协议性能改进策略

为满足协同打击数据链严苛的低时延、高速率、高可靠性等战术信息传输性能要求,TTNT数据链的SPMA协议基于随机竞争思想,综合使用时分和频分接入策略,降低不同用户信息发送的信道碰撞概率,但高负载情况下的冲突解决效果仍不理想,网络性能无法满足协同攻击要求.借鉴NOM A技术利用功率的差异同时多路传输信号的思想,在SPMA协议时、频域基础上引入功率域,提出一种联合功率域的SPMA协议性能改进策略,达到扩展数据链网络的信道资源、进一步减小信息碰撞概率的目的.建模分析及仿真结果表明,采用该改进策略可以使数据链网络承载更大的业务流量,有效了提高网络吞吐量,降低网络时延.

A Performance Improvement Strategy of SPMA Protocol Based on Joint Power Domain

Aimed at the problem that the conflict resolution effect under high load conditions is still not ideal, and the network performance cannot meet the requirements of cooperative attacks, this paper draws on the idea of using the power difference of NOMA technology to multiplex signals simultaneously, and introduces the power domain on the basis of the SPMA protocol time and frequency domain. For this, the paper proposes a strategy for improving the performance of the SPMA protocol in the joint power domain, expanding the channel resources of the data link network and achieving the goal of reducing further the probability of information collision. The results show that the improved strategy makes not only the data link network carry more business traffic, but also effectively improves network throughput and reduces network delay.