5G网络中基于用户需求的频谱资源分配方案

针对第5代(5G)通信系统的频谱特性和用户需求特征，提出局部最优(local optimization，LO) 算法。该算法不同于传统的频谱分配方法，在考虑5G网络中用户需求的情况下，同时提高频谱的利用率。LO算法根据用户需求特征和频谱特性的相应参数计算出二者对彼此的偏好优先级顺序，计算出综合满意度，让用户依次从未分配的频谱中选择让其综合满意度最大的频谱。通过MATLAB软件在用户数和频谱数不同的2种情况下仿真，分析结果可知，LO算法的平均综合满意度、用户和频谱对彼此的整体满意度均高于稳定婚姻(stable marriage，SM)配对算法，且频谱利用率、频谱丢包率与用户丢包率的比值都低于SM算法，并且可以兼顾频谱利用率和用户可靠性要求。同时，LO算法的算法复杂度为O(n^3)。

Spectrum allocation scheme based on user requirements in 5G network

Considering the trait of spectrum and the characteristics of user requirements, the local optimization (LO) algorithm is proposed. Different from the traditional spectrum allocation methods, the LO algorithm considers the user requirements as well as the improvement of spectrum utilization. First, the LO algorithm calculates the preference priority order of user and spectrum according to the corresponding parameters of their traits, and then figure out the comprehensive satisfaction degree. Next, it lets users select the spectrum of the maximum comprehensive satisfaction degree from the unmatched spectrum in turn. Making simulation with MATLAB under two different circumstances, we get the analysis that LO algorithm not only has higher average comprehensive satisfaction degree and mutual overall satisfaction degree of user and spectrum than Stable Marriage(SM) algorithm, but has lower spectrum utilization and droplet ratio, which demonstrates that the LO algorithm can take into account both spectrum utilization and the reliability requirement of user. Meanwhile, the complexity of LO algorithm is O(n^3), suggesting that it is feasible.