請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/63079
完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 周俊廷(Chun-Ting Chou) | |
dc.contributor.author | Chung-Chun Chen | en |
dc.contributor.author | 陳重均 | zh_TW |
dc.date.accessioned | 2021-06-16T16:21:41Z | - |
dc.date.available | 2013-02-16 | |
dc.date.copyright | 2013-02-16 | |
dc.date.issued | 2013 | |
dc.date.submitted | 2013-01-30 | |
dc.identifier.citation | [1] 3GPP TS 36.104, Evolved Universal Terrestrial Radio Access (E-UTRA);Base
Station (BS) radio transmission and reception (Release 10)' [2] 3GPP TS 36.213, Evolved Universal Terrestrial Radio Access (E- UTRA);Physical layer procedures (Release 10)' [3] D833GPP TS 36.300, Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 10)' [4] 3GPP RAN2 proposal, R2101530', WG2RL2TSGR269 [5] 3GPP RAN2 proposal, R2101196' ,WG2RL2TSGR269 [6] 3GPP RAN2 proposal, R2113015' ,WG2RL2TSGR270 [7] Yu.Li, Shanghai Research Center for Wireless Communications, Adaptive TDD UL/DL Slot Utilization for Cellular Controlled D2D Communications', in Mobile Congress (GMC) conference, Shanghai, 17-18 Oct. 2011 [8] Klaus Doppler, Mika Rinne, Carl Wijting, Cassio B. Ribeiro, and Klaus Hugl, Nokia Research Center, Device to Device Communication as an Underlay to LTE Advanced Networks', IEEE Communications Magazine, pp. 42-49, Decem- ber 2009 [9] Guangxiang Yuan, Beijing University of Posts and Telecommunications and Uni- versity College London Xiang Zhang and Wenbo Wang, Carrier Aggregation for LTE-Advanced Mobile Communication Systems', IEEE Communications Mag- azine, pp. 88-93, February 2010 [10] M. Scott Corson, Rajiv Larota, Junyi Li, Vincent Park, QUALCOMM INC, Toward Proximity-Aware Interworking', IEEE Wireless Communications Mag- azine, pp.26-33, December 2010 | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/63079 | - |
dc.description.abstract | 隨著智慧型手機和平板電腦的普及,無線網路的傳輸速率要求日益增加,第
三世代合作組織提出了LTE-A 做為第四世代無線網路標準,且仍不斷透過長期 研究提高無線網路傳輸效率。在現有的無線網路規劃中,載波聚合是增加傳輸 流量的關鍵技術。藉由同時使用不同的載波傳輸,可以達到比現今標準所定義 更高的傳輸流量。然而使用多載波傳輸存在一些問題必須解決,同步是最主要 的問題。在現今標準中,所有載波被認為有相同的傳輸延遲,並使用同樣的同 步參數。然而在某些情境下下比如頻率選擇中繼器的使用,不同載波間的傳輸 延遲可能會不相同。在目前標準訂定的方法下,可能會使載波的同步不準確並 對其他用戶的傳輸造成干擾。我們將分析此問題並提出可行的解決方法提高系 統效能。 用戶間的直接傳輸是另一個可以提高網路流量的方法,D2D 指的是裝置對裝 置的直接傳送技術,旨在讓用戶直接傳輸而無須將資料傳輸至基地台並利用後 端網路傳遞。藉由相鄰用戶間直接傳輸,不但可以節省網路資源,更免去了資 料經由後端網路繞送的時間。因此可以達到更高速且更節省資源的傳輸。在目 前的LTE-A 標準中並未規範直接傳輸的方法,因此我們分析直接傳輸可能會遇 到的挑戰並提出方法克服。 在本論文中,探討可以增加用戶個別流量的載波聚合技術並對此技術在同步 上的問題提出完整的解決方法。可使用戶的每個載波得到各自的同步參數並與 基地台同步。此方法是藉由基地台接收資料的正確度來判斷載波的傳輸延遲, 所以各用戶並不需要增加任何額外複雜度。我們也做了模擬,在各種可能造成 載波間不同傳輸延遲的情境中探討我們方法的效能。另一方面為了增加整體網 路的傳輸流量,我們將探討如何將D2D 技術介紹至LTE-A 網路裡。我們也提出 了一套完整的通訊協議使的D2D 傳輸能夠成功執行在現有的LTE-A 規範下。最 後我們計算出在LTE-A 下整個D2D 傳輸流程所需要的信令開銷,以供比較。 | zh_TW |
dc.description.abstract | With the popularity of smart phones and tablet computers, demands of high data rate wireless access increases explosively. To support higher transmission speed and quality, long term evolution advanced (LTE-A) which is con rmed as 4G by International Telecommunication Unit (ITU) has been proposed by 3rd Generation Partnership Project (3GPP). Although being recognized as a 4G technology, 3GPP continues to enhance the performance of LTE-A networks. Among all the features introduced to the current standard of LTE-A, carrier aggregation is one of the most important technologies that allows expansion of bandwidth by utilizing multiple car- riers in di erent bands and provides potentially much higher throughput than that of the current standard. Although carrier aggregation enhances LTE-A network per- formance, some issues must be addressed. Synchronization of carriers is one of the most important problems. In an LTE network, timing advance (TA) is used for up- link synchronization. A user equipment (UE) needs to acquire each carrier's TA in order to uplink synchronize to the eNB. In the current standard, all the carriers are considered to have the same propagation delay and thus, use the same TA. However, in scenarios where frequency selective repeaters are used, the propagation delay of di erent carriers may be di erent. Once the TAs of these carriers are wrong, inter- ference may happen. Therefore, we propose a solution for this problem and enhance the performance of the current system.
Device to device (D2D) communication is another approach to increase network throughput. D2D is a technology complementary to the existing cellular network with great bene ts since the data need not be routed through the core network. In this thesis, we also focus on the feasibility of D2D transmission in an LTE network anddesign protocols for proximal discovery and data transmission over the LTE radio access network. We conduct analysis for our protocols and evaluate the signaling overhead and the delay performance. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T16:21:41Z (GMT). No. of bitstreams: 1 ntu-102-R99942125-1.pdf: 4039391 bytes, checksum: c17726235d66583c337565c75e6772ee (MD5) Previous issue date: 2013 | en |
dc.description.tableofcontents | ABSTRACT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
LIST OF TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi LIST OF FIGURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii CHAPTER 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . 1 1.1 Introduction to LTE and LTE-A . . . . . . . . . . . . . . . . . . . . 1 1.2 Problem statement and objectives . . . . . . . . . . . . . . . . . . . 2 1.3 Related work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.4 Thesis organization . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 CHAPTER 2 RANDOM ACCESS PROCEDURE AND THE D2D USE CASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1 Downlink synchronization and random access procedure . . . . . . . 9 2.1.1 TA calculation process . . . . . . . . . . . . . . . . . . . . . 12 2.1.2 Multicarrier scheme in LTE . . . . . . . . . . . . . . . . . . . 13 2.2 Research of D2D communication . . . . . . . . . . . . . . . . . . . . 15 2.2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.2.2 Description of the ooading use case . . . . . . . . . . . . . 16 2.2.3 Possible challenges . . . . . . . . . . . . . . . . . . . . . . . . 18 CHAPTER 3 SOLUTIONS OF MULTI-TA PROBLEMS . . . . . . 20 3.1 Scenarios requiring multiple TAs . . . . . . . . . . . . . . . . . . . . 20 3.2 Problems of CA in multi-TA scenarios . . . . . . . . . . . . . . . . . 21 3.2.1 Problem identication . . . . . . . . . . . . . . . . . . . . . . 21 3.2.2 Multi-path fading delay . . . . . . . . . . . . . . . . . . . . . 24 3.2.3 Mathematical analysis . . . . . . . . . . . . . . . . . . . . . . 25 3.3 Solutions of multi-TA problems . . . . . . . . . . . . . . . . . . . . . 30 3.4 Our proposed solution . . . . . . . . . . . . . . . . . . . . . . . . . . 31 3.4.1 The main idea of our solution . . . . . . . . . . . . . . . . . 31 TABLE OF CONTENTS v 3.4.2 Detailed description of our solution . . . . . . . . . . . . . . 31 3.5 Simulation results . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 CHAPTER 4 PROTOCOL DESIGN OF D2D TRANSMISSION IN LTE NETWORKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 4.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 4.2 Initial attach and handover procedure . . . . . . . . . . . . . . . . . 40 4.3 Protocol design of proximal discovery . . . . . . . . . . . . . . . . . 47 4.3.1 System model . . . . . . . . . . . . . . . . . . . . . . . . . . 47 4.3.2 Solutions of proximal discovery in an LTE network . . . . . . 48 4.4 Protocol design of D2D transmission over the LTE radio access network 51 4.4.1 Signaling formats and parameters . . . . . . . . . . . . . . . 52 4.4.2 Procedures of D2D transmission over the LTE radio access network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 4.4.3 Error detection/correction scheme of D2D transmission . . . 61 4.5 Conclusions of D2D in LTE . . . . . . . . . . . . . . . . . . . . . . . 64 CHAPTER 5 CONCLUSIONS . . . . . . . . . . . . . . . . . . . . . . 67 REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68 | |
dc.language.iso | en | |
dc.title | LTE-A網路下高流量傳輸之設計 | zh_TW |
dc.title | Design of High Throughput Transmission in LTE-A Networks | en |
dc.type | Thesis | |
dc.date.schoolyear | 101-1 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 林風(Phone-Lin),魏宏宇(Hung-Yu Wei),葉丙成(Ping-Cheng Yeh) | |
dc.subject.keyword | 4G,LTE-A 網路,第三世代合作組織,高流量傳輸,載波聚合,裝置對裝置,直接傳輸,信令開銷, | zh_TW |
dc.subject.keyword | 4G,LTE-A,3GPP,Carrier aggregation,High throughput,D2D, | en |
dc.relation.page | 69 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2013-01-30 | |
dc.contributor.author-college | 電機資訊學院 | zh_TW |
dc.contributor.author-dept | 電信工程學研究所 | zh_TW |
顯示於系所單位: | 電信工程學研究所 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-102-1.pdf 目前未授權公開取用 | 3.94 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。