在LTE-A 網路以節能為基礎之下行鏈路無線電資源管理

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姓名

易啟福(Chi-fu Yih) 查詢紙本館藏

畢業系所

通訊工程學系

論文名稱

在LTE-A 網路以節能為基礎之下行鏈路無線電資源管理
(The Study of Power-saving Based Radio Resource Management for Downlink Traffic in LTE-A Network)

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摘要(中)

在 LTE-Advanced 系統下，載波聚合是一項相當重要的技術，LTE-Advanced UE 透過此技術可以使用更大的頻寬傳輸資料，但UE 端必須開啟更多的天線以在多個載波上接收資料。由於行動載具的電池電量有限，因此如何讓LTE-Advanced UE 省電成為一項相當重要的議題。
目前相當多的論文都在探討如何讓基地台配置適合的CC (Component Carrier)供UE 使用，比較常見的方法是以Random 或Round Robin 的方式進行，但不論是使用以上哪種方法，都會造成CC 的負載量不平均或是讓UE 分配到不適合的CC。因此我們提出了一個新的CC 選擇方法，此方法考量CC 的負載情形及UE 在不同CC 上的通道狀況，可以讓系統達到較佳的傳輸效能。
本論文除了提出新的 CC 選擇方式，還設計了以省電為目的的資源分配方法，
最後我們的模擬是在LTE-Advanced 系統的下行鏈路，採用HTTP 及video
streaming 兩種不同的traffic 型態來驗證我們所提出的方法。

摘要(英)

Carrier Aggregation is one of the most important technologies in the LTE-Advanced system. LTE-Advanced UE could use more than one component
carriers, so the UE’’s mobile device needs to activate more than one antenna. Because the battery of mobile devices is limited﹐ power saving becomes a very important issue
for user.
Resource allocation with Carrier Aggregation to UEs is issued in many papers presently, i.e., how to choose the right component carrier to the new arrival user, and
how to improve the transmission rate when allocating resource with Carrier Aggregation. The common methods about the CC selection are Random and Round Robin. Neither of the methods mentioned above is good for the system. If the Random CC selection is chosen, the load of carriers cannot balance well. Or if Round Robin CC selection is chosen, it would cause the user can’’t get enough resource. So we
propose a new method about the CC selection, taken the load of CC and the channel condition of UE in different CCs into consideration, which is able to improve the system performance.
In this study, we propose a new CC selection method and design a resource allocation method. The method’’s goal is to reduce power consumption. Finally, we adopt two different types of services, HTTP and Video Streaming in LTE-Advanced
system in downlink, to simulate our proposed method in the LTE-Advanced system,validating our method.

關鍵字(中)

★ 下行鏈路
★ 省電機制
★ 載波聚合技術
★ LTE-Advanced
★ LTE

關鍵字(英)

★ downlink
★ LTE
★ power saving
★ Carrier Aggregation
★ LTE-Advanced

論文目次

中文摘要 I
Abstract II
致謝 III
目錄 IV
圖目錄 VI
表目錄 VIII
第一章緒論 1
1.1 研究背景1
1.2 研究動機與目的 2
1.3 章節概要 3
第二章相關研究 4
2.1 LTE 無線網路基本介紹 4
2.1.1 LTE 系統架構 5
2.1.2 LTE Protocol Layer 架構 6
2.2 LTE MAC 層 7
2.3 LTE Frame 架構 8
2.3.1 Resource Block (RB) 9
2.4 LTE-Advanced carrier aggregation介紹 10
2.5 LTE-Advanced carrier aggregation 省電機制介紹 14
2.6 相關文獻 15
第三章研究方法 24
3.1 系統架構 24
3.2 權重計算機制 26
3.2.1 UE priority 權重計算 26
3.2.2 Component carriers 選擇之權重計算方式 28
3.3 資源需求量之計算方式 29
3.4 分配頻寬(Resources allocation)30
3.5 通道狀況回報機制 33
3.6 資源分配流程 35
第四章模擬結果與討論 37
4.1 模擬環境介紹 37
4.2 Traffic model 介紹38
4.2.1 HTTP traffic model 38
4.2.2 video streaming traffic model 40
4.3 模擬結果分析 41
4.3.1 與[13]比較之模擬結果與分析 42
4.3.2 與[20]比較之模擬結果與分析 51
4.3.3 與[20]CC選擇方法比較之模擬結果與分析 53
第五章結論與未來研究 55
參考文獻 57

參考文獻

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[3] 3GPP TS 36.300 V10.3.0 Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2
[4] http://www.conniq.com/WiMAX/tdd-fdd.htm (2011/06/03)
[5] Moray Rumney BSc, C. Eng, MIET,"3GPP LTE: Introducing Single-Carrier FDMA,"Agilent Measurement Journal, no.4, pp.18-27, January 2008
[6] 3GPP TS 23.401. General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access
[7] 3GPP TS 36.211 V9.1.0, Evolved Universal Terrestrial Radio Access (E-UTRA),Physical Channels and Modulation
[8] Ian F. Akyildiz, David M. Gutierrez-Estevez, Elias Chavarria Reyes," The evolution to 4G cellular systems: LTE-Advanced," Physical Communication, vol.3,no. 4, pp. 217-244, Dec. 2010.
[9] Zukang Shen, A. Papasakellariou, J. Montojo, D. Gerstenberger, Fangli Xu,"Overview of 3GPP LTE-advanced carrier aggregation for 4G wireless communications," Communications Magazine, IEEE ,vol.50, no.2, pp. 122-130,February 2012
[10] R.Ratasuk, D.Tolli, A. Ghosh, 2010, “Carrier Aggregation in LTE Advanced,” Vehicular Technology Conference (VTC 2010-Spring), pp.1-5, Jun. 2010.
[11] Y. Wang et al ., “Carrier Load Balanc ing and Packet Scheduling for Multi-Carrier Systems,” IEEE Trans. Wireless Commun., May 2010, pp. 1780–89.
[12] Hui Tian, Songtao Gao, Jianchi Zhu, Lan Chen, "Improved Component Carrier Selection Method for Non-Continuous Carrier Aggregation in LTE-Advanced Systems,"IEEE Vehicular Technology Conference, pp. 1-5, Sept. 2011
[13] L. Zhang, K. Zheng, W. Wang, L. Huang, “Performance analysis on carrier scheduling schemes in the long-term evolution-advanced system with carrier aggregation”, IET Commun., vol. 5, pp. 612-619, 2011.
[14] Yaojun Wang, Dengkun Xiao, Wenjie Wang, “A Research on Power Consumption of Receiver in CA Scenarios”, ICIE, vol. 1, pp. 247-250, 2010
[15] Fei Yin, “An application aware discontinuous reception mechanism in LTE-advanced with carrier aggregation consideration”, ANNALS OF TELECOMMUNICATIONS, vol. 67, pp. 147-159, 2012
[16] 3GPP TS 23.203 V9.4.0, Technical Specification Group Services and System Aspects, Policy and charging control architecture
[17]3GPP TS 36.213 V9.1.0, Evolved Universal Terrestrial Radio Access (E-UTRA),Physical layer procedures
[18] 3GPP TS 36.101, Evolved Universal Terrestrial Radio Access (E-UTRA), User Equipment (UE) radio transmission and reception
[19] 3GPP TR 25.892 V6.0.0,Technical Specification Group Radio Access Network,Feasibility Study for Orthogonal Frequency Division Multiplexing (OFDM) for UTRAN enhancement
[20] 林威龍。2012。在LTE-A 網路以載波聚合為基礎之下行鏈路無線電資源管
理。碩士論文。國立中央大學通訊工程研究所。

指導教授

陳彥文(Yen-wen Chen)

審核日期

2012-7-26

推文