一种用于毫米波5G无线应用的多频段OFDMA异构网络
A Multiband OFDMA Heterogeneous Network for Millimeter Wave 5G Wireless Applications
摘要：
新兴的第五代（5G）无线网络需要更高频带中的大量带宽、极端网络密度以及支持多种无线技术的灵活性，以便提供更高的数据率和无缝覆盖。预计毫米波（mmWave）频带中的大带宽的利用和异构网络（HetNet）的部署将有助于解决5G网络的数据率要求。然而，毫米波频带中的高路径损耗和遮蔽、由于大规模网络致密化而导致的HetNet中的强干扰以及各种空中接口的协调是必须解决的挑战。在本文中，我们考虑一个基于中继的多频带正交频分多址（OFDMA）HetNet中，毫米波小小区部署在宏小区的服务区域内。具体而言，我们试图利用毫米波频带的不同传播特性（即，60 GHz（V频带）和70-80 GHz（E频带）以及长期演进（LTE）频带，以经由有效的资源分配来最大化网络的总体数据率。首先利用改进的对偶分解方法求解该问题，然后提出了一种基于迭代活动选择算法的低复杂度贪婪求解方法。仿真结果表明，该方法优于传统的方案。
英文摘要：
Emerging fifth generation (5G) wireless networks require massive bandwidth in higher frequency bands, extreme network densities, and flexibility of supporting multiple wireless technologies in order to provide higher data rates and seamless coverage. It is expected that utilization of the large bandwidth in the millimeter-wave (mmWave) band and deployment of heterogeneous networks (HetNets) will help address the data rate requirements of 5G networks. However, high pathloss and shadowing in the mmWave frequency band, strong interference in the HetNets due to massive network densification, and coor- dination of various air interfaces are challenges that must be addressed. In this paper, we consider a relay-based multiband orthogonal frequency division multiple access (OFDMA) HetNet in which mmWave small cells are deployed within the service area of macro cells. Specifically, we attempt to exploit the distinct propagation characteristics of mmWave bands (i.e., 60 GHz- the V-band - and 70-80 GHz -the E-band-) and the Long Term Evolution (LTE) band to maximize overall data rate of the network via efficient resource allocation. The problem is solved using a modified dual decomposition approach and then a low complexity greedy solution based on iterative activity selection algorithm is presented. Simulation results show that the proposed approach outperforms conventional schemes.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
