基于服务质量保证的D2D资源分配算法研究
Research on D2D Resource Allocation Algorithm Based on Service Quality Assurance

随着移动通信的发展，设备数量快速增长，用户对通信要求也普遍提高，频谱资源变得愈发紧张。在这样的背景下，设备直通(Device-to-Device, D2D)通信技术应运而生。伴随着D2D设备在5G通信领域的大规模应用，本文介绍了D2D通信的优势并提出了一种基于服务质量保证的资源分配算法，该算法的模型研究建立在单蜂窝小区中，对通信用户进行细致的归类，在保证用户服务质量的前提下，该算法扩大了D2D用户可用信道的选择范围，优化了系统性能。当通信用户较多时，服务质量不再是影响系统总速率的关键因素，在本文的模型下，把蜂窝小区半负载化，减少频谱利用率增加系统总速率，选择干扰最小的用户实现系统速率的最大化。通过D2D通信模型仿真，该算法与贪婪启发式算法对比在通信接近饱和度时的速率明显提高。
With the development of mobile communications, the number of devices has grown rapidly, users’ communication requirements have generally increased, and spectrum resources have become in-creasingly tight. In this context, Device-to-Device (D2D) communication technology came into being. With the large-scale application of D2D equipment in the field of 5G communication, this paper in-troduces the advantages of D2D communication and proposes a resource allocation algorithm based on service quality assurance, the algorithm model research is based on a single cell, the communi-cation users are classified in detail, under the premise of ensuring the quality of user service, the algorithm expands the selection range of available channels for D2D users and optimizes system performance. Through the simulation of the D2D communication model, the rate of the algorithm compared with the greedy heuristic algorithm is significantly improved when the communication is close to saturation. When there are many communication users, the quality of service no longer af-fects the key factor of the total system rate, under the model of this paper, the cellular cell is half-loaded, the spectrum utilization is reduced to increase the total system rate, and the user with the least interference is selected to maximize the system rate.