Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/7412
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dc.contributor.advisor歐陽彥杰zh_TW
dc.contributor.advisorYen-Chieh Ouyangen_US
dc.contributor.author姜羽倫zh_TW
dc.contributor.authorJiang, Yu-Lumen_US
dc.date2001zh_TW
dc.date.accessioned2014-06-06T06:40:02Z-
dc.date.available2014-06-06T06:40:02Z-
dc.identifier.urihttp://hdl.handle.net/11455/7412-
dc.description.abstract在第三代的個人行動通訊傳輸系統中,系統上傳與下傳流量的不對稱是一個值得注意的特性。如果在早期的流量支配的整個系統,在上傳與下傳之間系統流量嚴重的不平衡狀態將會發生,但是在下一代行動通訊CDMA/TDD的系統中,上傳與下傳流量的不平衡將不再是一個嚴重的問題。我們可以再分時雙工的系統下運用簡單的功率控制,或著提供新的多媒體存取控制協定去解決上傳與下傳流量的不對稱性。所以我們可以說,在第三代行動通訊中使用CDMA/TDD的系統可解決上傳與下傳間流量的不平衡。在這篇論文中,我們研究發現在CDMA/TDD系統底下當上下傳流量不平衡時,提供動態上傳時槽與下傳時槽邊界的移動(DBM),將可有效的增加時槽的利用率和系統的使用人數。在DBM的程序中,系統將定時的比較上傳與下傳的流量,並預測下一時段的上下傳流量,以作更有效的時槽分配。在效能的測量方面,我們將比較,系統的利用率,阻塞率(Blocking rate),和系統的容量……等。我們利用模擬方法去比較原來系統與加入DBM程序的系統之效能,我們發現使用DBM可得到較好的效能結果。zh_TW
dc.description.abstractTraffic asymmetry between uplink and downlink is one of notable characteristics in the next generation wireless communication system. Severe traffic unbalance between two links will occur if in the early traffic is a dominant one in a system. In the CDMA/TDD system, the traffic unbalance problem can be solved by providing an easy power control method, or propose a new MAC protocol for a time-division duplex (TDD) wideband CDMA system to solve that problem. On the other hand, the CDMA/TDD system using unbalanced time slot allocation between two links is a way to solve the traffic unbalance problem. In this thesis, we propose a dynamic boundary movement mechanism (DBM) for CDMA/TDD system which can effectively increase time slot utilization and system capacity. The DBM procedure compared uplink traffic and downlink traffic, and forecast rate in next frame. The dropping rate, system utilization, and packet-blocking rate were investigated. Theoretical analysis is conducted and simulation results display that the performance of voice and data on unbalance traffic system and also show that the proposed scheme yields a good performance.en_US
dc.description.tableofcontentsContents 1.Introduction……………………………………………………1 1.1Motivation……………………………………………………..1 1.2Overview of the Personal Communication System (PCS) ……………3 1.3Next Generation Wireless Communication System………………………..4 1.4Organization of the Thesis………………………………………………….6 2.Description of Third Generation Personal Communication System for TDD Mode……………………………………………………………………………7 2.1 TDD mode and FDD mode…………………………………………………7 2.2 CDMA/TDD System Description…………………………………………..8 2.2.1 TDD Frame Format………………………………………………….8 2.2.2 Time Division Duplex (TDD) Operation……………………………9 2.2.3 Multi-code Transmission…………………………………………..10 2.2.4 Flexible UL/DL Time-Slot Allocation……………………………..11 3.Modeling and Simulation of System Traffic………………………………..14 3.1 TDD System Architecture and Basic assumptions………………………….14 3.1.1 Integrate Voice and Data Traffic in TDD Mode……………………..14 3.1.2 Analysis the Model…………………………………………………19 3.1.3 Performance Measure………………………………………………21 3.2 Simulation Analysis Results……………………………………………….23 3.3 Summary…………………………………………………………………...28 4.Dynamic Boundary Movement (DBM)………..………………..30 4.1 Introduction……………………………………………………………….30 4.2 Proposed Method …………………………………………………………31 4.2.1 Dynamic Boundary Movement (DBM)……………………………31 4.2.2 Performance Measure……………………………………………...37 4.3 Simulation Results and Analysis………………………………………….39 4.4 Conclusion………………………………………………………………...49 5.Conclusion and Future Work……………………………………………….50 1.5Conclusion………………………………………………………………...50 1.6Future Work……………………………………………………………….51 Appendix…………………………………………………………………………..54 Bibliography………………………………………………………………………56zh_TW
dc.language.isoen_USzh_TW
dc.publisher電機工程學系zh_TW
dc.subjectdynamic boundary movementen_US
dc.subject動態邊界的移動zh_TW
dc.subjecttime slot allocationen_US
dc.subjectIMT-2000en_US
dc.subjectCDMA/TDDen_US
dc.subject時槽的分配zh_TW
dc.subjectIMT-2000zh_TW
dc.subjectCDMA/TDDzh_TW
dc.title第三代行動通訊CDMA/TDD系統上傳與下傳動態時槽分配之研究zh_TW
dc.titleThe Investigation of Dynamic Boundary Movement in CDMA/TDD Systemsen_US
dc.typeThesis and Dissertationzh_TW
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypeThesis and Dissertation-
item.cerifentitytypePublications-
item.fulltextno fulltext-
item.languageiso639-1en_US-
item.grantfulltextnone-
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