Location-Aware Hypergraph Coloring Based Spectrum Allocation for D2D Communication

Zheng Li, Shuo Chen, Caili Guo
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引用次数: 5

Abstract

Device-to-device (D2D) communication underlaying cellular networks has been recognized as a promising technique to improve spectrum efficiency. However, densely deployed D2D pairs could cause severe interference to cellular user equipments (CUEs) without proper spectrum allocation. Since the CUEs are the primary users of the spectrum band, the quality of service(QoS) of CUEs should be guaranteed. Therefore, the location-aware hypergraph coloring (LAHC) based spectrum allocation algorithm is proposed in uplink D2D underlaying cellular networks. For a particular CUE, the entire cell area is divided into location-aware regions. A set of D2D pairs identified by these regions are limited when sharing spectrum with the CUE to protect the CUE from connection interruption. In addition, we study spectrum allocation using hypergraph coloring method to eliminate cumulative interference from multiple D2D pairs. Simulation indicates that the proposed spectrum allocation algorithm can both guarantee that D2D links will not cause service disruption to CUEs and significantly improve the system capacity,
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基于位置感知超图着色的D2D通信频谱分配
基于蜂窝网络的设备对设备(D2D)通信被认为是一种很有前途的提高频谱效率的技术。然而,密集部署的D2D对频谱分配不当会对蜂窝用户设备(CUEs)造成严重干扰。由于用户是频段的主要用户,因此需要保证用户的服务质量(QoS)。为此,提出了基于位置感知超图着色(LAHC)的上行D2D底层蜂窝网络频谱分配算法。对于特定的CUE,整个单元区域被划分为位置感知区域。当与CUE共享频谱时,由这些区域识别的一组D2D对是有限的,以保护CUE免受连接中断。此外,我们还研究了使用超图着色方法来消除多个D2D对的累积干扰的频谱分配。仿真结果表明,所提出的频谱分配算法既能保证D2D链路不会对cue造成业务中断,又能显著提高系统容量。
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