Multi-User Proportional Fair Scheduling for Uplink Non-Orthogonal Multiple Access (NOMA)
Multi-User Proportional Fair Scheduling for Uplink Non-Orthogonal Multiple Access (NOMA)
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DOI：
10.1109/vtcspring.2014.7022998
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发表时间：
2014-05
期刊：
影响因子：
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通讯作者：
Xiaohang Chen;A. Benjebbour;Anxin Li;A. Harada
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文献类型：
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作者：
Xiaohang Chen;A. Benjebbour;Anxin Li;A. Harada
非正交多址（NOMA）是用于LTE版本13及以后的有前途的无线电接入技术。在本文中，我们专注于上行NOMA与先进的连续干扰消除（SIC）接收机应用在基站侧的系统性能的调查。在NOMA中，多个用户可以在同一频带内同时复用，这就需要多用户调度。在我们的研究中，我们提出了一个增强的比例公平（PF）为基础的调度方案，为非正交复用用户连续资源分配，以保留SC-FDM属性。为了降低非正交多址接入的调度复杂度，采用了贪婪连续资源分配方法。此外，由于NOMA中的干扰条件变得更加复杂，我们考虑将分数频率复用（FFR）应用于NOMA，以进一步提高小区边缘用户的性能。在仿真结果中，NOMA的系统性能通过使用所提出的基于PF的调度算法进行评估。结果表明，NOMA与传统的正交多址相比，显著提高了上行链路系统的性能。
Non-orthogonal multiple access (NOMA) is a promising radio access technique for LTE release 13 and beyond. In this paper, we focus on the investigation of the system performance for uplink NOMA with an advanced successive interference cancellation (SIC) receiver applied in the base station side. In NOMA, more than one user can be multiplexed simultaneously in the same frequency bandwidth, which demands multi-user scheduling. In our study, we propose an enhanced proportional fair (PF) based scheduling scheme for non-orthogonal multiplexed users with contiguous resource allocation to retain the SC-FDM property. In order to reduce the scheduling complexity for non-orthogonal multiple access, a greedy consecutive resource allocation method is adopted. Moreover, since the interference condition becomes more complicated in NOMA, we consider the application of fractional frequency reuse (FFR) to NOMA to further enhance the performance of cell-edge users. In simulation results, the system performance of NOMA by using the proposed PF-based scheduling algorithm is evaluated. The results show that NOMA significantly enhances the uplink system performance compared to the conventional orthogonal multiple access.