D2D系统模式切换和功率分配技术
发布时间：2019-05-27 14:19
【摘要】：随着无线通信技术的发展,无线通信将向网络融合的方向发展,目的是通过综合利用多种无线接入技术和无线通信方式,提高无线系统的频谱利用率和网络的容量。设备直通(D2D, Device to Device)通信就是其中的技术热点之一,它允许蜂窝网络中距离相近的两个移动设备进行直接通信,可提高无线通信系统的资源利用率以及数据传输速率,减小用户终端的发射功率,因此研究D2D通信技术有着十分重要的意义。 论文首先概述了课题的背景和研究内容,介绍目前D2D通信的研究方向和研究动态,包括信道测量机制以及会话发起与管理等,重点总结D2D通信系统的无线资源管理策略和相应的算法机制。 随后,论文描述了在多用户多入多出(Multiple-Input Multiple-Output, MIMO)场景下的D2D复用多个蜂窝用户资源的数学模型,并基于该模型提出了模式切换策略和迫零干扰消除(Zero Forcing Interference Elimination, ZFIE)策略,根据上述策略提出了模式距离和ZFIE距离,仿真结果表明,所提出的策略可以提高系统的吞吐量,从而提高系统的资源利用率。 最后,论文从绿色通信的角度出发,以能量效率为目标函数,提出了多个D2D对同时复用多个蜂窝用户资源的数学模型,借助非合作博弈论的理论工具,建立对应的潜在博弈模型,并证明了该模型存在唯一的纳什均衡点。最后设计了相应的算法流程,使蜂窝用户和D2D终端可自主选择合适的资源和功率。仿真结果表明,论文所提算法以较低的复杂度取得了较好的效果,在保证系统频谱效率的同时,最优化系统的能量效率。
[Abstract]:With the development of wireless communication technology, wireless communication will develop in the direction of network convergence, the purpose of which is to improve the spectrum efficiency and network capacity of wireless systems by making comprehensive use of a variety of wireless access technologies and wireless communication methods. Device pass-through (D2D, Device to Device) communication is one of the technical hotspots, which allows two mobile devices with similar distances to communicate directly in cellular networks, which can improve the resource utilization and data transmission rate of wireless communication systems. The transmission power of user terminal is reduced, so it is very important to study D2D communication technology. Firstly, this paper summarizes the background and research content of the subject, and introduces the current research direction and research trends of D2D communication, including channel measurement mechanism, session initiation and management, and so on. The wireless resource management strategy and corresponding algorithm mechanism of D2D communication system are summarized in detail. Then, the paper describes the mathematical model of D2D reuse of multiple cellular user resources in multi-user multiple-input multiple-output (Multiple-Input Multiple-Output, MIMO) scenario, and proposes a mode switching strategy and zero-forcing interference cancellation (Zero Forcing Interference Elimination, based on this model. ZFIE) strategy. According to the above strategy, the mode distance and ZFIE distance are proposed. The simulation results show that the proposed strategy can improve the throughput of the system and thus improve the resource utilization of the system. Finally, from the point of view of green communication, taking energy efficiency as the objective function, this paper proposes a mathematical model of multiple D2D pairs to reuse multiple cellular user resources at the same time, with the help of the theoretical tool of non-cooperative game theory. The corresponding potential game model is established, and it is proved that the model has a unique Nash equilibrium point. Finally, the corresponding algorithm flow is designed, so that cellular users and D2D terminals can choose the appropriate resources and power independently. The simulation results show that the proposed algorithm achieves good results with low complexity, and optimizes the energy efficiency of the system while ensuring the spectral efficiency of the system.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5
本文编号：2486216
[Abstract]:With the development of wireless communication technology, wireless communication will develop in the direction of network convergence, the purpose of which is to improve the spectrum efficiency and network capacity of wireless systems by making comprehensive use of a variety of wireless access technologies and wireless communication methods. Device pass-through (D2D, Device to Device) communication is one of the technical hotspots, which allows two mobile devices with similar distances to communicate directly in cellular networks, which can improve the resource utilization and data transmission rate of wireless communication systems. The transmission power of user terminal is reduced, so it is very important to study D2D communication technology. Firstly, this paper summarizes the background and research content of the subject, and introduces the current research direction and research trends of D2D communication, including channel measurement mechanism, session initiation and management, and so on. The wireless resource management strategy and corresponding algorithm mechanism of D2D communication system are summarized in detail. Then, the paper describes the mathematical model of D2D reuse of multiple cellular user resources in multi-user multiple-input multiple-output (Multiple-Input Multiple-Output, MIMO) scenario, and proposes a mode switching strategy and zero-forcing interference cancellation (Zero Forcing Interference Elimination, based on this model. ZFIE) strategy. According to the above strategy, the mode distance and ZFIE distance are proposed. The simulation results show that the proposed strategy can improve the throughput of the system and thus improve the resource utilization of the system. Finally, from the point of view of green communication, taking energy efficiency as the objective function, this paper proposes a mathematical model of multiple D2D pairs to reuse multiple cellular user resources at the same time, with the help of the theoretical tool of non-cooperative game theory. The corresponding potential game model is established, and it is proved that the model has a unique Nash equilibrium point. Finally, the corresponding algorithm flow is designed, so that cellular users and D2D terminals can choose the appropriate resources and power independently. The simulation results show that the proposed algorithm achieves good results with low complexity, and optimizes the energy efficiency of the system while ensuring the spectral efficiency of the system.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5
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