蜂窝网复用D2D通信中的完全资源复用机制研究

出于更充分地利用蜂窝频谱资源及缓解基站负担的考量，设备到设备（Device-to-Device, D2D）通信技术应运而生。蜂窝网复用D2D通信的一个关键是设计合理的频谱资源共享和分配方案来控制蜂窝链路与D2D链路间的干扰。传统方法的局限性在于每个子信道至多被一对蜂窝链路与D2D链路共享。这一假设不仅使得蜂窝频谱得不到充分利用，D2D用户的接入率也受到了极大的限制。本项目提出的完全资源复用机制通过让每个子信道资源可以被任意数目的D2D链路和一个蜂窝链路复用，克服了上述局限性，从而更加充分地利用频谱资源。本项目拟首先提出基于干扰感知的复用集合划分算法，保证能够有效提高频谱利用率的同时又能有效控制干扰，并在集合划分的基础上研究高效的频谱分配机制。本项目的成功实施可以有力地推动以D2D通信为基础来实现泛在的、可靠的和高速的无线宽带接入。

Device-to-device (D2D) communication has been recently proposed to mitigate the burden of base stations by leveraging the underutilized cellular spectrum resources, where resource sharing and resource allocation between cellular and D2D links are critical in D2D communication underlaying cellular networks. The existing approaches assume that a subchannel can only be shared by a pair of one cellular link and one D2D link, which results in low resource utilization and low D2D access rate. In this project, we propose a full resource sharing scheme where each subchannel can be shared by one cellular link and an arbitrary number of D2D links to improve the spectrum resource utilization. In this project, we will first propose an interference-aware set partitioning algorithm that improves the resource utilization while mitigates the interference, and then we will propose efficient resource allocation algorithms based on the partitioning results. To sum up, this project has a great potential to accelerate the development of ubiquitous and reliable high-speed wireless broadband networks based on D2D communication.