蜂窝与D2D异构网络的同步技术方案研究与实现

发布时间：2018-01-08 21:07

本文关键词：蜂窝与D2D异构网络的同步技术方案研究与实现　出处：《北京邮电大学》2015年硕士论文　论文类型：学位论文

更多相关文章： D2D 同步 状态模式 多线程 异构网络

【摘要】：设备直通(Device to Device, D2D)技术是一种在移动终端间建立直接通信链路来传输数据的新兴技术。混合蜂窝与端到端异构网络不但有助于提高频谱效率,而且为未来建立更广泛互联互通通信网络提供了基础。同步是一个通信网络能够实现通信的基础,本论文围绕基于LTE网络的D2D技术展开,目的在于对混合蜂窝与端到端异构网络中的同步方案进行研究,设计并实现一种可行的可用于工程实践的同步方案。首先,本文对混合蜂窝与端到端异构网络进行了详细分析。分析了该异构网络中的同步源种类以及各同步源特性,进而介绍了各同步源对应的Cell同步、Sync同步、和Cel1UE同步技术。之后对异构网络中可能存在的各种通信同步场景进行了详细分析,分析了双终端在不同覆盖情况下的各种通信场景及其之间的场景切换情况,以此为基础探讨了三终端场景和更复杂的多终端场景。随后,本文对该异构网络同步方案进行了设计。通过对通信场景的分析,可知该异构网络通信场景复杂多变,因此本文选择了设计模式中的状态模式作为同步方案为该异构网络设计出了一种可行的同步状态机。本文提出的同步状态机方案将系统的同步状态机设计分为上行子状态机和下行子状态机两部分,并对各子状态机进行了静态设计和动态转移设计。最后,本文所设计的同步方案进行了工程实现。基于多线程技术,依托于《LTE系统下设备直通技术》课题所搭建的通信系统平台,本文实现了所设计的同步方案,并通过实际业务验证了所设计的同步方案能够满足该异构网络中复杂的同步功能需求。
[Abstract]:The device has direct access to device to Device. D2D) technology is a new technology to establish direct communication links between mobile terminals to transmit data. Hybrid cellular and end-to-end heterogeneous networks can not only improve the spectral efficiency. Synchronization is the basis on which a communication network can realize communication. This paper focuses on D2D technology based on LTE network. The aim of this paper is to study the synchronization scheme between hybrid cellular and end-to-end heterogeneous networks and to design and implement a feasible synchronization scheme for engineering practice. First of all, this paper analyzes the hybrid cellular and end-to-end heterogeneous networks in detail, analyzes the types of synchronization sources and the characteristics of each synchronization source in the heterogeneous network, and then introduces the Cell synchronization corresponding to each synchronization source. Sync synchronization, and Cel1UE synchronization technology. After the heterogeneous network may exist in a variety of communication synchronization scenarios are analyzed in detail. Based on the analysis of different communication scenarios and scene switching between two terminals under different coverage conditions, three terminal scenarios and more complex multi-terminal scenarios are discussed. Then, this paper designs the heterogeneous network synchronization scheme. Through the analysis of the communication scene, we know that the heterogeneous network communication scene is complex and changeable. Therefore, this paper chooses the state mode in the design pattern as the synchronization scheme and designs a feasible synchronous state machine for the heterogeneous network. The proposed synchronous state machine scheme divides the design of the synchronization state machine of the system into two parts. Row substate machine and downlink sub-state machine two parts. The static design and dynamic transfer design of each sub-state machine are carried out. Finally, the synchronization scheme designed in this paper is implemented in engineering. Based on multi-thread technology, the communication system platform based on "equipment through Technology under LTE system" is built. In this paper, the designed synchronization scheme is implemented, and it is verified that the proposed synchronization scheme can meet the needs of the complex synchronization function in the heterogeneous network.
【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

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