LTE-TDD競爭隨機接入過程的實現(xiàn)
發(fā)布時間：2018-07-13 07:51
【摘要】：隨著無線寬帶技術(shù)的不斷發(fā)展和應用,LTE(Long Term Evolution,長期演進)的技術(shù)正在不斷的趨于成熟,并且已經(jīng)進入了商用化的接入調(diào)試的最后實現(xiàn)階段,對于LTE的眾多協(xié)議特性基本都趨于統(tǒng)一,隨機接入功能是實現(xiàn)終端寬帶接入的重要功能,它的實現(xiàn)對于LTE 4G網(wǎng)絡來說是一項最基本、最重要的性能指標,對于LTE隨機接入功能的具體實現(xiàn)方式各個設備制造商各不相同,主要是在層一(PHY層)和層二(MAC層)上的實現(xiàn)分歧比較大,基于此原因需要提出一個比較合理、互聯(lián)互通性比較強的實現(xiàn)方案,并且需要通過測試來驗證隨機接入功能的合理性和正確性。LTE要實現(xiàn)的目標是在不同帶寬條件下如1.4MHz、3MHz、5MHz、10MHz、15MHz和20M的帶寬條件下面,能夠?qū)崿F(xiàn)上下行的高速率。為了實現(xiàn)LTE的技術(shù),對于能夠使無線信號穩(wěn)定的,準確的接入LTE系統(tǒng)并且能夠正常工作已經(jīng)成為LTE系統(tǒng)穩(wěn)定性的一個重要的衡量標準。在實現(xiàn)LTE通信系統(tǒng)時,采用了使LTE協(xié)議棧運行在Linux的操作系統(tǒng)平臺之上的方式,并且在Linux的平臺上進行研發(fā)測試。LTE通信系統(tǒng)可以分為頻分雙工復用(FDD)和時分雙工復用(TDD)兩種,本論文所要介紹的重點是LTE-TDD的通信系統(tǒng),并且如何將3GPP的隨機接入?yún)f(xié)議轉(zhuǎn)化成LTE-TDD通信系統(tǒng)中的隨機接入功能,并能夠?qū)㈦S機接入功能夠完全實現(xiàn)在LTE的通信系統(tǒng)中,隨后能夠?qū)τ贚TE-TDD隨機接入功能的實現(xiàn)進行有效的,科學的測試。同時也會介紹各種隨機接入的實現(xiàn)和空口協(xié)議。最后對實現(xiàn)方案提出改進想法和發(fā)展方向。對于在LTE-TDD通信系統(tǒng)中隨機接入功能的實現(xiàn)和驗證主要做了一下幾方面的工作:1.對于3GPP協(xié)議中關(guān)于隨機接入功能進行理解和分析。本文對3GPP的隨機接入功能進行分析和理解,并且根據(jù)隨機接入的流程特點參照LTE-TDD通信系統(tǒng)的特點設計一套科學的隨機接入的實現(xiàn)方案。2.對于LTE-TDD系統(tǒng)中的競爭隨機接入過程進行實現(xiàn)設計,并且把隨機分為兩部分。即對物理隨機接入信道的實現(xiàn)設計與接入的過程在LTE-TDD的媒質(zhì)接入控制層的實現(xiàn)設計,在媒質(zhì)接入控制層的實現(xiàn)設計階段主要是對層二的功能模塊進行了設計,并且對這些功能模塊在系統(tǒng)中的作用做了詳細的介紹。3.將3GPP協(xié)議中的競爭隨機接入過程在真實的LTE-TDD的系統(tǒng)中得以實現(xiàn)。并且根據(jù)3GPP協(xié)議中競爭隨機接入過程的消息信令的交互,轉(zhuǎn)化成TLE-TDD系統(tǒng)中的競爭隨機接入過程功能。對于在實現(xiàn)競爭隨機接入過程中,各模塊在實現(xiàn)中所起的作用和工作的原理也做了詳細的說明。并且對每個實現(xiàn)競爭隨機接入過程的消息信令進行具體的定義和實現(xiàn)。4.對于在真實LTE-TDD系統(tǒng)中實現(xiàn)的競爭隨機接入過程進行科學、詳細的測試與驗證工作。并且同時對照3GPP協(xié)議中定義的一些競爭型隨機接入過程的消息參數(shù)進行測試與驗證,最終證明隨機接入過程在真實LTE-TDD系統(tǒng)中得以實現(xiàn)。5.通過對LTE-TDD通信系統(tǒng)競爭隨機接入過程的實現(xiàn),無線終端在LTE-TDD系統(tǒng)中的接入成功率得到了很大程度的提高,并且終端與基站之間的鏈路的穩(wěn)定性和可靠性也得到很好的改善。
[Abstract]:With the continuous development and application of wireless broadband technology, the technology of LTE (Long Term Evolution, long term evolution) is becoming mature, and has entered the final implementation stage of commercial access debugging. The many protocol characteristics of LTE tend to be unified, and random access function is an important work for the realization of terminal broadband access. Yes, its implementation is the most basic and most important performance index for LTE 4G network. For the specific implementation of LTE random access functions, each device manufacturer is different, mainly in the layer one (PHY layer) and layer two (MAC layer), the realization of the difference is relatively large. Based on this reason, a more reasonable, interconnected interoperability needs to be proposed. A strong implementation scheme, and the need to test to verify the rationality and correctness of the random access function.LTE to achieve the goal is under the different bandwidth conditions such as 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20M, under the bandwidth conditions, can achieve the downlink high rate. In order to achieve LTE Technology, it can make wireless signals stable. The fixed, accurate access to the LTE system and the normal work have become an important measure of the stability of the LTE system. When the LTE communication system is realized, the LTE protocol stack is run on the Linux operating system platform, and the.LTE communication system can be divided into frequency division on the Linux platform. There are two kinds of duplex multiplexing (FDD) and time division duplex multiplexing (TDD). The focus of this paper is on the communication system of LTE-TDD, and how to convert the random access protocol of 3GPP into the random access function of the LTE-TDD communication system, and can make the random access work fully present in the LTE communication system, and then be able to follow the LTE-TDD random access system. The realization of the machine access function is effective and scientific. At the same time, the implementation of random access and the empty protocol are also introduced. Finally, the improvement ideas and the development direction are put forward. Some work is done for the realization and verification of the random access function in the LTE-TDD communication system: 1. for the 3GPP protocol In this paper, the random access function is understood and analyzed. This paper analyzes and understands the random access function of 3GPP, and designs a set of scientific random access implementation scheme based on the characteristics of the random access process referring to the characteristics of the LTE-TDD communication system, which is designed for the design of the competitive random access process in the LTE-TDD system, and the design of the random access process in the system is designed, and the design of the random access process in the 3GPP system is designed. And divide the random into two parts: the design and access process of the physical random access channel in the medium access control layer of LTE-TDD, the design phase of the medium access control layer is mainly the function module of layer two, and the function of these functional modules in the system is detailed. This paper introduces.3. to implement the competitive random access process in the 3GPP protocol in the real LTE-TDD system, and translates into the competitive random access process function in the TLE-TDD system according to the message signaling interaction of the competitive random access process in the 3GPP protocol. The functions and principles of the work are also explained in detail. And the specific definition of message signaling for each competitive random access process and the implementation of.4. for the competitive random access process implemented in the real LTE-TDD system are scientifically tested and verified. At the same time, some of the definitions defined in the 3GPP protocol are compared. The message parameters of the competitive random access process are tested and verified. Finally, it is proved that the random access process can achieve.5. through the implementation of the competitive random access process of the LTE-TDD communication system in the real LTE-TDD system. The access success rate of the wireless terminal in the LTE-TDD system has been greatly improved, and the terminal and the base station The link stability and reliability have also been improved.
【學位授予單位】：上海交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.5
本文編號：2118690
[Abstract]:With the continuous development and application of wireless broadband technology, the technology of LTE (Long Term Evolution, long term evolution) is becoming mature, and has entered the final implementation stage of commercial access debugging. The many protocol characteristics of LTE tend to be unified, and random access function is an important work for the realization of terminal broadband access. Yes, its implementation is the most basic and most important performance index for LTE 4G network. For the specific implementation of LTE random access functions, each device manufacturer is different, mainly in the layer one (PHY layer) and layer two (MAC layer), the realization of the difference is relatively large. Based on this reason, a more reasonable, interconnected interoperability needs to be proposed. A strong implementation scheme, and the need to test to verify the rationality and correctness of the random access function.LTE to achieve the goal is under the different bandwidth conditions such as 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20M, under the bandwidth conditions, can achieve the downlink high rate. In order to achieve LTE Technology, it can make wireless signals stable. The fixed, accurate access to the LTE system and the normal work have become an important measure of the stability of the LTE system. When the LTE communication system is realized, the LTE protocol stack is run on the Linux operating system platform, and the.LTE communication system can be divided into frequency division on the Linux platform. There are two kinds of duplex multiplexing (FDD) and time division duplex multiplexing (TDD). The focus of this paper is on the communication system of LTE-TDD, and how to convert the random access protocol of 3GPP into the random access function of the LTE-TDD communication system, and can make the random access work fully present in the LTE communication system, and then be able to follow the LTE-TDD random access system. The realization of the machine access function is effective and scientific. At the same time, the implementation of random access and the empty protocol are also introduced. Finally, the improvement ideas and the development direction are put forward. Some work is done for the realization and verification of the random access function in the LTE-TDD communication system: 1. for the 3GPP protocol In this paper, the random access function is understood and analyzed. This paper analyzes and understands the random access function of 3GPP, and designs a set of scientific random access implementation scheme based on the characteristics of the random access process referring to the characteristics of the LTE-TDD communication system, which is designed for the design of the competitive random access process in the LTE-TDD system, and the design of the random access process in the system is designed, and the design of the random access process in the 3GPP system is designed. And divide the random into two parts: the design and access process of the physical random access channel in the medium access control layer of LTE-TDD, the design phase of the medium access control layer is mainly the function module of layer two, and the function of these functional modules in the system is detailed. This paper introduces.3. to implement the competitive random access process in the 3GPP protocol in the real LTE-TDD system, and translates into the competitive random access process function in the TLE-TDD system according to the message signaling interaction of the competitive random access process in the 3GPP protocol. The functions and principles of the work are also explained in detail. And the specific definition of message signaling for each competitive random access process and the implementation of.4. for the competitive random access process implemented in the real LTE-TDD system are scientifically tested and verified. At the same time, some of the definitions defined in the 3GPP protocol are compared. The message parameters of the competitive random access process are tested and verified. Finally, it is proved that the random access process can achieve.5. through the implementation of the competitive random access process of the LTE-TDD communication system in the real LTE-TDD system. The access success rate of the wireless terminal in the LTE-TDD system has been greatly improved, and the terminal and the base station The link stability and reliability have also been improved.
【學位授予單位】：上海交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.5
【參考文獻】
相關(guān)期刊論文 前1條
1 孫媛;4G通信系統(tǒng)關(guān)鍵技術(shù)初探[J];電信工程技術(shù)與標準化;2004年04期
，本文編號：2118690
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