基于马尔科夫过程的频谱接入建模与分析

Modeling and Analysis of Spectrum Access Based on Markov Process

为了解决军事应急网络作为认知用户接入战术通信骨干网的频谱接入问题,将多优先级认知用户的频谱接入行为建模为连续马尔科夫链模型,并以此模型为基础设置阻塞概率、切换概率和中断概率3个参数,分析授权用户、高优先级认知用户和低优先级认知用户相应的到达、退出频谱行为对通信系统的影响。理论分析与仿真结果表明:该模型能够比较不同用户的频谱接入行为对通信系统的影响,定量分析通信系统的频谱接入性能。

In order to solve the problem of spectrum access in the military emergency network when a secondary user accesses the tactical communication backbone networks,the spectrum access behavior of multi-priority secondary users is modeled as continuous Markov Chain Model. Based on this model,three parameters are set: the blocking probability,hand-off probability,and interrupt probability. And the influence of the corresponding spectrum of arrival and departure of primary users,high-priority secondary users,and low-priority secondary users on the communication system is analyzed. The results of theoretical analysis and simulation show that this model can compare the influence of different users' spectrum access,and quantitatively analyze the spectrum access performance of communication system.