本文選題：GMR-13G + RLC　； 參考：《北京交通大學(xué)》2014年碩士論文

【摘要】：如今新一代衛(wèi)星移動通信系統(tǒng)多數(shù)都支持GMR-13G標(biāo)準(zhǔn)(GMR,Geostationary earth orbit Mobile Radio interface),該標(biāo)準(zhǔn)是由歐洲電信標(biāo)準(zhǔn)化研究所ETSI (European Telecommunications Standards Institute)發(fā)布的可與地面3G核心網(wǎng)互聯(lián)的地球同步衛(wèi)星移動通信空中接口技術(shù)規(guī)范,從基于GSM (Global System for Mobile communication)標(biāo)準(zhǔn)的通信系統(tǒng)GMR-1演化而來。GMR-13G通信系統(tǒng)作為新一代衛(wèi)星移動通信系統(tǒng),為地面提供基于同步衛(wèi)星的3G移動通信業(yè)務(wù),而如何保證通信過程中控制信令及業(yè)務(wù)數(shù)據(jù)有效的處理并進(jìn)行可靠傳輸是整個系統(tǒng)研究實(shí)現(xiàn)中需要解決的重要問題。本文關(guān)于GMR通信系統(tǒng)中數(shù)據(jù)傳輸處理的研究與實(shí)現(xiàn)就是以解決上述問題為基礎(chǔ),依附于整個GMR-13G協(xié)議棧系統(tǒng)軟件,最終完成了系統(tǒng)中RLC (Radio Link Control)/MAC (Media Access Control)層協(xié)議的主體功能,即系統(tǒng)信令以及業(yè)務(wù)數(shù)據(jù)的傳輸處理。 本文以GMR-13G無線接入網(wǎng)側(cè)RLC/MAC層協(xié)議為基礎(chǔ),在對協(xié)議總體有所了解之后,本人對RLC/MAC層協(xié)議進(jìn)行了詳細(xì)的分析與研究,然后設(shè)計并編碼實(shí)現(xiàn)協(xié)議中關(guān)于數(shù)據(jù)傳輸處理的功能,從而完成了GMR通信系統(tǒng)對于控制信令和業(yè)務(wù)數(shù)據(jù)的可靠傳輸。其中,RLC層提供TM (Transparent Mode)、UM (Un-acknowledge Mode)、AM (Acknowledge Mode)三種數(shù)據(jù)傳輸模式,AM數(shù)據(jù)傳輸模式功能最為復(fù)雜,同時也包含其他模式主體功能的實(shí)現(xiàn)。因此,本文以實(shí)現(xiàn)AM傳輸模式為主線,對AM發(fā)送與接收模塊設(shè)計以及上下行數(shù)據(jù)傳輸流程做了詳細(xì)介紹,并重點(diǎn)實(shí)現(xiàn)下行數(shù)據(jù)的分段級聯(lián)、選擇性重傳以及上行數(shù)據(jù)重組三大功能。最后,本人在時多任務(wù)操作系統(tǒng)VxWorks平臺模擬測試環(huán)境,對數(shù)據(jù)處理功能的實(shí)現(xiàn)進(jìn)行了功能性與一致性驗(yàn)證。 綜合項目實(shí)際需求和實(shí)現(xiàn)難度方面考慮,目前GMR-13G通信系統(tǒng)中關(guān)于數(shù)據(jù)傳輸處理的總體設(shè)計和其中的三種傳輸模式的設(shè)計方案已經(jīng)能夠符合預(yù)期的應(yīng)用要求,通過和終端的聯(lián)調(diào)驗(yàn)證,數(shù)據(jù)傳輸處理功能實(shí)現(xiàn),終端和基站接入網(wǎng)之間能夠進(jìn)行正常的數(shù)據(jù)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.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN927.2

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