政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/108120

政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/108120

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Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/108120

Title:	LTE-A D2D傳輸在動態頻率重用下之頻譜分配 Spectrum allocation of LTE-A D2D transmissions using dynamic frequency reuse
Authors:	許華元 Hsu, Hwa Yuan
Contributors:	張宏慶 Jang, Hung Chin 許華元 Hsu, Hwa Yuan
Keywords:	動態頻率重用 D2D LTE-A 頻率重用 Dynamic frequency reuse D2D LTE-A Frequency reuse
Date:	2017
Issue Date:	2017-04-05 15:37:04 (UTC+8)
Abstract:	LTE-A在靜態頻率重用的情形下，雖能有效減少干擾，但在UE (User Equipment)較為集中情形下，會有頻譜使用不足的情況。在傳統的傳輸模式中，若UE之間欲進行傳輸，通常需由傳輸端發送訊號給基地台，基地台再發送訊號給接收者，需要進行兩次的無線傳輸。若UE在彼此距離相近的環境中，D2D (Device-to-Device)傳輸可讓UE之間直接利用LTE-A頻譜進行傳輸，進而達到節省頻譜資源的效果。本研究探討靜態頻率重用的缺點與位置相近的D2D傳輸模式，提出DFRDD (Dynamic Frequency Reuse for D2D transmission)方法，使用動態頻率重用與D2D傳輸技術。我們將一個細胞(cell)劃分為中央區域及外圍區域，外圍區域又劃分為三個扇形區，使用動態頻率重用的方法調整頻譜，在頻譜不足時，中央區域可使用外圍區域的頻譜，外圍區域最多可使用中央區域三分之一的頻譜。在使用D2D技術時，利用D2D UE與BS/RS (Base Station/Relay Station)的距離，計算出對基地台UE干擾較少的頻譜，進而提升傳輸效率。實驗結果顯示，DFRDD利用動態頻率重用與D2D選擇頻譜的方法、在吞吐量方面表現得較H. S.Chae [18]、Bao [19]、Zhang [20]所提出的方法為佳。 In the case of LTE-A static frequency reuse, although it can effectively reduce the interference, however, in the case of more dense UEs (User Equipment) environment, there will be problem of insufficient spectrum. In the traditional transmission method, if a pair of UEs want to communicate with each other, the transmitter sends a signal to the base station, the base station then sends a signal to the receiver, the signal need to to be wirelessly transmitted twice. If a pair of UEs are within a close distance, D2D (device-to-device) transmission allows users to communicate with each other directly using the same LTE-A spectrum to save spectrum resource. In order to improve LTE-A system performance, this paper proposes a DFRDD (Dynamic Frequency Reuse for D2D transmission) method. Using dynamic frequency reuse and D2D transmission, we divide a cell into center region and outer area, where the outer area is divided into three sectors. We use dynamic frequency reuse method to allocate spectrum. When the spectrum is insufficient, the center region can use the spectrum of the outer region. On the other hand, the outer area can use up to one third of the spectrum of the center region. When using D2D technic, we calculate the distance between D2D UE and the BS / RS (Base Station / Relay Station), choose the frequency that may reduce the interference of cellular UE and improve transmission efficiency. The experimental results show that DFRDD uses the method of dynamic frequency reuse and D2D to select the spectrum, which has better performance than those methods proposed by Chae [18], Bao [19] and Zhang [20].
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Wu, "Enable device-to-device communications underlaying cellular networks: challenges and research aspects," in IEEE Communications Magazine, vol. 52, no. 6, pp. 90-96, Jun. 2014. [18] H. S. Chae, J. Gu, B. G. Choi and M. Y. Chung, "Radio resource allocation scheme for device-to-device communication in cellular networks using fractional frequency reuse," The 17th Asia Pacific Conference on Communications, pp. 58-62, Oct. 2011. [19] P. Bao, G. Yu and R. Yin, "Novel frequency reusing scheme for interference mitigation in D2D uplink underlaying networks," 2013 9th International Wireless Communications and Mobile Computing Conference (IWCMC), pp. 491-496, Sep. 2013. [20] Z. Zhang, R. Q. Hu, Y. Qian and A. Papathanassiou, "D2D communication underlay in uplink cellular networks with fractional power control and fractional frequency reuse," 2015 IEEE Global Communications Conference (GLOBECOM), pp. 1–7, Dec. 2015. [21] B. Muhammad and A. Mohammed, “Performance evaluation of uplink closed loop power control for LTE System,” in Vehicular Technology Conference Fall, IEEE 70th, pp. 1–5, Sep. 2009. [22] S. T. Shah, J. Gu, S. F. Hasan, and M. Y. Chung,”SC-FDMA-based resource allocation and power control scheme for D2D communication using LTE-A uplink resource,” EURASIP Journal on Wireless Communications and Networking, vol. 2015, May. 2015. [23] B. G. Choi, J. S. Kim, M. Y. Chung, J. Shin and A. S. Park, "Development of a system-level simulator for evaluating performance of device-to-device communication underlaying LTE-Advanced networks," 2012 Fourth International Conference on Computational Intelligence, Modelling and Simulation, pp. 330-335, Sep. 2012. [24] M. Hasan and E. Hossain, "Resource allocation for network-integrated device-to-device communications using smart relays," 2013 IEEE Globecom Workshops (GC Wkshps), pp. 591-596, Dec. 2013. [25] P. Li, M. Rong, Y. Xue, D. Yu, L. Wang and H. Shi, “Spectrum partitioning and relay positioning for cellular system enhanced with two-hop fixed relay nodes,” IEICE Trans. Comm., vol. E90-B, no.11, pp. 3181-3188, Nov. 2007. [26] ITU-R report M.2135, “Guidelines for evaluation of radio interface technologies for IMT-Advanced,” 2008. [27] CQI. Retrieved 2016.9.22, from URL: http://www.sharetechnote.com/html/Handbook_LTE_CQI.html [28] 3GPP TS 36.106 v.8.3.0 Evolved Universal Terrestrial Radio Access (E-UTRA); FDD repeater radio transmission and reception.
Description:	碩士國立政治大學資訊科學學系 100753001
Source URI:	http://thesis.lib.nccu.edu.tw/record/#G0100753001
Data Type:	thesis
Appears in Collections:	[Department of Computer Science ] Theses

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