蜂窝与D2D混合网络的资源管理算法研究

发布时间：2018-03-18 01:00

本文选题：移动通信　切入点：直连通信　出处：《北京邮电大学》2015年硕士论文　论文类型：学位论文

【摘要】：近些年来,随着智能终端数量的急剧增长,各种新的应用程序不断出现,导致移动数据流量,尤其是移动视频业务量大幅提升。同时,移动通信对于数据传输速率的要求也越来越高。未来的蜂窝网络中,高质量的语音业务已不能满足用户的需求,系统必须能够提供大量的数据传输服务。因而,有必要显著提升系统容量和实现高数据速率覆盖。传统的蜂窝网络架构已不能满足这样的要求,研究人员引入了许多先进技术进行网络性能的改善,直连通信(Device-to-Device, D2D)就是其中之一。然而,D2D通信可能在实际中因为远距离、传播介质、蜂窝干扰等因素而受到严重限制。因此,提出多跳D2D通信的概念来扩展D2D系统的通信能力。多跳通信中恰当的路由算法会对系统性能产生重要影响,特别是能量有效性能。信道复用和功率分配对提高多跳D2D通信系统的能量有效性起到关键作用,但已有的路由算法较少同时考虑这两个因素。此外,D2D系统中干扰管理的相关机制已经很多,且各有所长,有必要对它们进行系统的总结和仿真分析,得出合理的性能对比。因此,本论文主要工作如下： 1.通过联合优化信道复用和功率分配,提出了一种新型的蜂窝与D2D混合网络中能量有效的多跳D2D路由算法。首先,将能量有效的多跳路由问题建模为一个组合优化问题；其次,为了获得一个运算量可行的解,并且得到满意的能量有效性能,提出了一个启发式多跳D2D路由算法；最后,仿真结果分析表明,本文所提出的路由算法与其他已有的相关算法相比,在不同的场景下均具有较好的能量有效性。 2.在D2D通信中引入部分频率复用(Fractional Frequency Reuse,FFR)进行干扰管理,可以有效的提升系统吞吐量和中断概率。本文系统的总结了在蜂窝与D2D混合网络中FFR技术的典型应用,对FFR动态频谱分配方案和FFR最优阈值方案做了较详细的分析比较,并将上述两种方案在不同场景中进行了仿真和讨论。
[Abstract]:In recent years, with the rapid growth of the number of intelligent terminals, various new applications are emerging, resulting in a significant increase in mobile data traffic, especially mobile video traffic. In future cellular networks, high quality voice services can no longer meet the needs of users, and the system must be able to provide a large number of data transmission services. It is necessary to significantly increase system capacity and achieve high data rate coverage. Traditional cellular network architectures can no longer meet such requirements, and researchers have introduced many advanced technologies to improve network performance. Direct communication device-to-device (D-2 D) is one of them. However, D2D communication may be severely restricted in practice because of such factors as distance, propagation medium, cellular interference, etc. The concept of multi-hop D2D communication is proposed to extend the communication capability of D2D system. The proper routing algorithm in multi-hop communication will have an important impact on the performance of the system. In particular, energy efficiency, channel multiplexing and power allocation play a key role in improving the energy efficiency of multi-hop D2D communication systems. However, the existing routing algorithms seldom consider these two factors at the same time. In addition, there are many relevant mechanisms of interference management in D2D systems, and each has its own strong points. It is necessary to summarize and simulate them, and get a reasonable performance comparison. Therefore, the main work of this paper is as follows:. 1. By jointly optimizing channel multiplexing and power allocation, a novel energy-efficient multi-hop D2D routing algorithm in cellular and D2D hybrid networks is proposed. Firstly, the energy-efficient multi-hop routing problem is modeled as a combinatorial optimization problem. A heuristic multi-hop D2D routing algorithm is proposed in order to obtain a feasible solution with computational complexity and satisfactory energy efficiency. Finally, the simulation results show that, Compared with other existing algorithms, the proposed routing algorithm has better energy efficiency in different scenarios. 2. In D2D communication, using Fractional Frequency reuse FFR) in D2D communication can effectively improve system throughput and interrupt probability. In this paper, the typical applications of FFR technology in cellular and D2D hybrid networks are summarized. The dynamic spectrum allocation scheme of FFR and the optimal threshold scheme of FFR are analyzed and compared in detail, and the two schemes are simulated and discussed in different scenarios.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN929.5

【共引文献】