在LTE網路下基於適應性負載平衡 之天線自我組態調整

Adaptive Load Balancing Based on Self-Configuration of Antenna Adjustment in LTE Network

塗朝淙(Chao-Tsung Tu)

指導教授 ： 吳承崧

國立中正大學/工學院/通訊工程學系/碩士(2015年)

摘要

在蜂巢式行動網路中，無線行動裝置近來更加普及化使得整體網路負擔過大，加上使用者移動的不確定性所造成的細胞間負載有明顯的差異。對於細胞負載過重時使用者所需求資源無法應求造成品質下降，因此本論文考量以相同基地台間細胞負載平衡，藉由改變細胞覆蓋範圍讓負載過大細胞轉移鄰近負載較輕的鄰近細胞來達到細胞之間負載平衡。基於相同基地台因指向天線所分屬不同扇形範圍依不同負載情況利用多個天線形成矩陣來控制天線主波束寬度與方向，使得控制覆蓋範圍來達到轉移負載，並引進Q-learning概念達到動態優化調整參數，藉此細胞間負載平衡提高整體網路效能

關鍵字

天線矩陣 ； 換手程序 ； 負載平衡 ； 自我組織網路 ； 增強式學習

並列摘要

In cellular mobile network, the wireless mobile devices become more popular and it make the overall network overloading. Moreover, the significantly difference between cell loading which caused by the uncertainty in users moving. When the cell is overloading by users demand, the quality will decreasing. Therefore, this paper considers adjusting the cell coverage to achieve load balancing between cells by transferring loading from higher loading cell to the lower one.
We proposed a adaptive method to control antennas array beamwidth and direction to achieve load balancing in cells. Also, the method introduced Q-learning technique to optimize parameters dynamically to load balancing.

並列關鍵字

reinforcement learning ； antenna array ； Handover ； Load balancing ； Self-Organizing Network

參考文獻

[1]3GPP TS 36.300 v9.1.0.Evolved Universal Terrestrial Radio Access (EUTRA) and Evolved Universal Terrestrial Radio Access Network (EUTRAN).Sept.2009.

[2]T. Warabino, S. Kaneko, S. Nanba, and Y. Kishi, “Advanced load balancing in LTE/LTE-A cellular network,” in 2012 IEEE 23rd International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC), 2012, pp. 530 –535.

[3]I. Viering, M. Dottling, and A. Lobinger, “A Mathematical Perspective of Self-Optimizing Wireless Networks,” in IEEE International Conference on Communications, Sept,2009, pp. 1 –6.

[7]3GPP TS 36.300 v9.1.0.Evolved Universal Terrestrial Radio Access (EUTRA) and Evolved Universal Terrestrial Radio Access Network (EUTRAN) ,Sept ,2009.

[9]Y. Wei and M. Peng, “A mobility load balancing optimization method for hybrid architecture in self-organizing network,” in IET International Conference on Communication Technology and Application (ICCTA 2011), 2011, pp. 828 –832.