請用此 Handle URI 來引用此文件：
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/63014完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 廖婉君(Wanjiun Liao) | |
| dc.contributor.author | PO-HAN CHIANG | en |
| dc.contributor.author | 姜博瀚 | zh_TW |
| dc.date.accessioned | 2021-06-16T16:18:49Z | - |
| dc.date.available | 2014-02-21 | |
| dc.date.copyright | 2013-02-21 | |
| dc.date.issued | 2013 | |
| dc.date.submitted | 2013-02-04 | |
| dc.identifier.citation | [1] W. Webb, Wireless Communications: The Future. New York: Wiley, 2007
[2] V. Chandrasekhar, J. Andrews, and A. Gatherer, “Femtocell networks: a survey, ” IEEE Communications Magazine, vol.46, no.9, pp.59-67, September 2008 [3] A.Damnjanovic et al., “A survey on 3GPP heterogeneous networks, ” IEEE Wireless Communications , vol.18, no.3, pp.10-21, June 2011 [4] S. Bruck, “3G/4G Mobile Communications Systems, ” Qualcomm Corporate R&D Center Germany [5] 3GPP TS 36.300 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Overall description” V11.4.0 Dec 2012 [6] 3GPP TS 36.104 “Evolved Universal Terrestrial Radio Access (E-UTRA); Base Station (BS) radio transmission and reception, ” Dec 2012 [7] L. Lindbom et al., “Enhanced Inter-cell Interference Coordination for Heterogeneous Networks in LTE-Advanced: A Survey” [8] R. Madan et al., “Cell Association and Interference Coordination in Heterogeneous LTE-A Cellular Networks, ” IEEE Journal on Selected Areas in Communications, vol.28, no.9, pp.1479-1489, December 2010 [9] K. Okino, K. Nakayama, C. Yamazaki, H. Sato, and Y. Kusano, “Pico Cell Range Expansion with Interference Mitigation toward LTE-Advanced Heterogeneous Networks, ” IEEE ICCS , vol., no., pp.1-5, 5-9 June 2011 [10] D. Lopez-Perez, X. Chu, and I. Guvenc, “On the Expanded Region of Picocells in Heterogeneous Networks, ” IEEE Journal of Selected Topics in Signal Processing, vol.6, no.3, pp.281-294, June 2012 [11] K. Son, S. Chong, and G.Veciana, “Dynamic association for load balancing and interference avoidance in multi-cell networks, ” IEEE Transactions on Wireless Communications, July 2009 [12] H. Kim, G. de Veciana, X. Yang, and M. Venkatachalam, “Distributed ∝-Optimal User Association and Cell Load Balancing in Wireless Networks, ” IEEE/ACM Transactions on Networking, Feb. 2012 [13] V. Chandrasekhar and J. Andrews, “Uplink capacity and interference avoidance for two-tier femtocell networks, ” IEEE Transactions on Wireless Communications, vol.8, no.7, pp.3498-3509, July 2009 [14] D. Lopez-Perez, G. de la Roche, A. Valcarce, A. Juttner, and J. Zhang, “Interference avoidance and dynamic frequency planning for WiMAX femtocells” IEEE ICCS, vol., no., pp.1579-1584, 19-21 Nov. 2008 [15] R. Ramamonjison,et al., “Spectrum allocation strategies for heterogeneous networks, ” IEEE CROWNCOM, vol., no., pp.201-205, 1-3 June 2011 [16] Siemens,“Interference Mitigation by Partial Frequency Reuse”, 3GPP TSG-RAN WG1 Meeting #44, R1-060670,February 2006. [17] T. Novlan, J.G. Andrews, Is Sohn, R.K. Ganti, and A. Ghosh, “Comparison of Fractional Frequency Reuse Approaches in the OFDMA Cellular Downlink, ” IEEE GLOBECOM , vol., no., pp.1-5, 6-10 Dec. 2010 [18]F. Kelly, “Charging and rate control for elastic traffic,” Eur. Trans. Telecommun., vol. 8, pp. 33–37, Jan./Feb. 1997 [19] A. Jalali, R. Padovani, and R. Pankaj, “Data Throughput of CDMAHDR:a High Efficiency-High Data Rate Personal CommunicationWireless System”, IEEE VTC, vol. 3, pp. 1854–1858, May 2000 [20] H. J. Kushner and P. A. Whiting, “Convergence of proportional-fair sharing algorithms under general conditions, ” IEEE Trans. Wireless Commun., vol. 3, no. 4, pp. 1250-1259, July 2004 | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/63014 | - |
| dc.description.abstract | 異質網路是目前廣為應用的網路技術，其利用空間重用的特點來增加系統的頻譜效率。然而這個優勢卻因為大型基地台與小型基地台的傳輸功率差距受到限制。此外異質網路也帶來了關於頻譜使用效率和接收信號強度之間的權衡問題。在近來的相關研究中，有三種可增進網路效能的基礎技術，分別是用戶連結選擇、頻率或時間資源的分配、以及傳輸功率控制。我們發現大部分現有的研究中缺少同時針對以上三種要素和異質網路的特性做出完整考量的設計
為了解決這個問題，我們提出了一種新的機制，其包含1) 在異質網路中的部分頻率重用，讓頻譜使用效率和降低干擾之間取得一個較好的平衡；2) 一個基地台功率控制的遞迴演算法，其依據系統目前的效能調整傳輸功率，在不犧牲接收訊號強度的條件下實現流量卸載的功能；3)一個基地台的頻率資源分配演算法，其會根據負載和通道狀況分配給用戶適當的頻帶。在網路模擬的結果中顯示出我們提出的是一個有效率的流量卸載機制，其無論在網路的產出效能和公平性都有優良的表現。 | zh_TW |
| dc.description.abstract | Heterogeneous network (HetNet) is a promising technique to improve the system spectral efficiency by exploiting the benefit of spatial reuse. However, the benefit of HetNet is limited by the asymmetry of transmit power between macro BSs and small cells. Moreover, it leads to a natural tradeoff between SINR and spectral efficiency. In recent studies, there are three basic mechanisms to improve the network performance, user association, resource allocation, and transmit power control. On the other hand, there are rare studies take all of these three elements into accounts in HetNet.
To tackle the problem, we propose a novel mechanism which is combined with 1) a partial frequency reuse (PFR) scheme in HetNet, which achieve a balance between spectral efficiency and interference mitigation, 2) a iterative transmit power control algorism (TXPC) for macro BSs, which realize the traffic offloading from macro cell to pico cell without sacrificing the SINR performance, 3) a load-aware frequency allocation algorithm (LAA), which allocate proper frequency considering the load and channel condition. The simulation results show that our algorithm is indeed an efficient mechanism which has better network performance in average throughput and fairness. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-16T16:18:49Z (GMT). No. of bitstreams: 1 ntu-102-R99942142-1.pdf: 1519328 bytes, checksum: 2f235a7e467eb2142977e4b7a1981cec (MD5) Previous issue date: 2013 | en |
| dc.description.tableofcontents | Contents
口試委員會審定書 # 中文摘要 I ABSTRACT II LIST OF FIGURES VI LIST OF TABLE VII CHAPTER 1 INTRODUCTION 1 1.1 Introduction of HetNet and Challenges: 1 1.2 Motivation 4 1.3 Contribution 7 1.4 Organization 7 CHAPTER 2 RELATED WORKS AND SYSTEM MODEL 8 2.1 OFDMA Systems – LTE(Long term Evolution) 8 2.1.1 Frame structure of LTE 8 2.1.2 Bandwidth and resource congfiguration of LTE 8 2.2 Related Studies and Works in HetNet OFDMA system 9 2.2.1 Inter-cell interfernce 10 2.2.2 Underutilazation of small cells 12 2.2.3 Related Works 12 2.3 Spectrum Resource Allocation Strategy in Two-tier HetNet 15 2.3.1 Co-channel allocation 15 2.3.2 Dedicate channel allocation 16 2.3.3 Partial co-channel allocation 16 CHAPTER 3 PROPOSED METHOD 18 3.1 System Model 18 3.1.1 Propagation Model 18 3.1.2 User Traffic Model 19 3.2 Proposed Method 20 3.3 Problem Formulation 24 3.4 TX power control 26 3.5 Load-aware intra-cell frequency allocation 28 CHAPTER 4 SIMULATION 31 4.1 Simulation parameter 32 4.2 Simulation Result 34 4.2.1 Hotspot Topology 34 4.2.2 Random Topology 38 4.2.3 Discussion 39 CHAPTER 5 CONCLUSION 41 REFERENCES 42 | |
| dc.language.iso | en | |
| dc.subject | 流量卸載 | zh_TW |
| dc.subject | 異質網路 | zh_TW |
| dc.subject | 功率控制 | zh_TW |
| dc.subject | 頻率重用 | zh_TW |
| dc.subject | HetNet | en |
| dc.subject | traffic offloading | en |
| dc.subject | power control | en |
| dc.subject | frequency reuse | en |
| dc.title | 異質網路中利用頻率重複使用與功率控制
技術達成流量卸載的設計 | zh_TW |
| dc.title | Design of Frequency Reuse and Power Control Technique
toward Traffic Offloading in Heterogeneous Network | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 101-1 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 周承復(CF Chou),蘇炫榮(Hsuan-Jung Su),周俊廷(Chun-Ting Chou) | |
| dc.subject.keyword | 異質網路,流量卸載,功率控制,頻率重用, | zh_TW |
| dc.subject.keyword | HetNet,traffic offloading,power control,frequency reuse, | en |
| dc.relation.page | 44 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2013-02-04 | |
| 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 未授權公開取用 | 1.48 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。