GMR通信系统传输数据处理的设计与实现

发布时间：2018-05-14 19:40

本文选题：GMR-13G + RLC　；参考：《北京交通大学》2014年硕士论文

【摘要】：如今新一代卫星移动通信系统多数都支持GMR-13G标准(GMR,Geostationary earth orbit Mobile Radio interface),该标准是由欧洲电信标准化研究所ETSI (European Telecommunications Standards Institute)发布的可与地面3G核心网互联的地球同步卫星移动通信空中接口技术规范,从基于GSM (Global System for Mobile communication)标准的通信系统GMR-1演化而来。GMR-13G通信系统作为新一代卫星移动通信系统,为地面提供基于同步卫星的3G移动通信业务,而如何保证通信过程中控制信令及业务数据有效的处理并进行可靠传输是整个系统研究实现中需要解决的重要问题。本文关于GMR通信系统中数据传输处理的研究与实现就是以解决上述问题为基础,依附于整个GMR-13G协议栈系统软件,最终完成了系统中RLC (Radio Link Control)/MAC (Media Access Control)层协议的主体功能,即系统信令以及业务数据的传输处理。本文以GMR-13G无线接入网侧RLC/MAC层协议为基础,在对协议总体有所了解之后,本人对RLC/MAC层协议进行了详细的分析与研究,然后设计并编码实现协议中关于数据传输处理的功能,从而完成了GMR通信系统对于控制信令和业务数据的可靠传输。其中,RLC层提供TM (Transparent Mode)、UM (Un-acknowledge Mode)、AM (Acknowledge Mode)三种数据传输模式,AM数据传输模式功能最为复杂,同时也包含其他模式主体功能的实现。因此,本文以实现AM传输模式为主线,对AM发送与接收模块设计以及上下行数据传输流程做了详细介绍,并重点实现下行数据的分段级联、选择性重传以及上行数据重组三大功能。最后,本人在时多任务操作系统VxWorks平台模拟测试环境,对数据处理功能的实现进行了功能性与一致性验证。综合项目实际需求和实现难度方面考虑,目前GMR-13G通信系统中关于数据传输处理的总体设计和其中的三种传输模式的设计方案已经能够符合预期的应用要求,通过和终端的联调验证,数据传输处理功能实现,终端和基站接入网之间能够进行正常的数据通信。
[Abstract]:Today, most of the new generation of satellite mobile communication systems support the GMR-13G standard, GMR Geostation earth orbit Mobile Radio Interface, a geostationary satellite mobile link that can be interconnected with terrestrial 3G core networks issued by ETSI / European Telecommunications Standards Institute), European Institute of Telecommunications Standardization Technical specification for signal-air interface, GMR-13G communication system evolved from GMR-1, a communication system based on GSM Global System for Mobile communication) standard, as a new generation of satellite mobile communication system, which provides 3G mobile communication services based on synchronous satellites for the ground. However, how to ensure the effective processing and reliable transmission of the control signaling and service data in the communication process is an important problem to be solved in the research and implementation of the whole system. In this paper, the research and implementation of data transmission and processing in GMR communication system is based on solving the above problems, and it is attached to the whole GMR-13G protocol stack system software. Finally, the main function of the RLC Radio Link Control)/MAC Access Control layer protocol in the system is completed. Namely system signaling and service data transmission processing. This paper is based on the RLC/MAC layer protocol of GMR-13G wireless access network. After understanding the protocol, I analyze and research the RLC/MAC layer protocol in detail, then design and code the function of data transmission processing in the protocol. Thus, the reliable transmission of control signaling and service data in GMR communication system is completed. Among them, the RLC layer provides TM transparent mode / UM / Unacknowledge mode (Unacknowledge mode), which has the most complex function of AM data transmission mode, and also includes the realization of the main function of other modes. Therefore, this paper takes the realization of AM transmission mode as the main line, introduces the design of AM transmission and receiving module and the data transmission process of upstream and downlink in detail, and focuses on the realization of segment cascade of downlink and downlink data. Selective retransmission and uplink data recombination three major functions. Finally, I simulate the test environment on the VxWorks platform, and verify the function and consistency of the data processing function. Considering the actual demand and the difficulty of the project, the overall design of data transmission and processing and the design of three transmission modes in the GMR-13G communication system have been able to meet the expected application requirements. Through the connection with the terminal, the data transmission processing function is realized, and the normal data communication can be carried out between the terminal and the base station access network.
【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】：TN927.2

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