Interference Hypergraph-Based Resource Allocation (IHG-RA) for NOMA-Integrated V2X Networks
Interference Hypergraph-Based Resource Allocation (IHG-RA) for NOMA-Integrated V2X Networks
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DOI：
10.1109/glocom.2018.8648050
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发表时间：
2018-12
期刊：
影响因子：
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通讯作者：
Chen-Chen-Chen;Baoji Wang;Rongqing Zhang
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文献类型：
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作者：
Chen-Chen-Chen;Baoji Wang;Rongqing Zhang
车载通信网络是第五代（5G）移动的通信系统的核心应用场景，对数据速率和时延的要求极高。最近，非正交多址（NOMA）由于其显著提高频谱效率和减少数据传输延迟的能力而被认为是未来5G系统的有前途的技术。在本文中，我们建议在支持D2 D的V2X网络中引入NOMA，其中通过集中式资源管理允许基于空间重用的不同V2X通信的资源共享。针对NOMA集成V2X网络中NOMA和基于空间复用的资源共享所造成的复杂干扰场景，构建干扰超图模型来描述不同通信组之间的干扰关系。此外，基于所构造的超图，我们进一步提出了一种基于干扰超图的簇着色资源分配（IHG-RA）方案，该方案能够以较低的计算复杂度实现高效的QoS保证的资源块（RB）分配.仿真结果验证了我们提出的用于NOMA集成V2X通信的IHG-RA方案在提高网络总速率方面的有效性。
Vehicular communication network is a core application scenario in the fifth generation (5G) mobile communication system which requires ultra high data rate and ultra low latency. Most recently, non-orthogonal multiple access (NOMA) has been regarded as a promising technique for future 5G systems due to its capability in significantly improving the spectral efficiency and reducing the data transmission latency. In this paper, we propose to introduce NOMA in D2D-enabled V2X networks, where resource sharing based on spatial reuse for different V2X communications are permitted through centralized resource management. Considering the complicated interference scenario caused by NOMA and spatial reuse-based resource sharing in the investigated NOMA-integrated V2X networks, we construct an interference hypergraph to model the interference relationships among different communication groups. In addition, based on the constructed hypergraph, we further propose an interference hypergraph-based resource allocation (IHG-RA) scheme with cluster coloring algorithm, which can lead to both effective and efficient QoS-guaranteed resource block (RB) assignment with low computational complexity. Simulation results verify the efficiency of our proposed IHG-RA scheme for NOMA-integrated V2X communications in improving the network sum rate.