Efficient eNB Deployment Strategy for Heterogeneous Cells in 4G LTE Systems

• Main Authors: Chieh-an Chuang, 莊傑安
• Other Authors: You-Chiun Wang
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/59w4h6

碩士 === 國立中山大學 === 資訊工程學系研究所 === 103 === Base station deployment is critical for a cellular communication system because it determines the system construction cost and service quality to users. Conventional 2G and 3G systems assume that base stations are identical in the sense that they have the similar coverage range. For 4G systems, LTE introduces the concept of heterogeneous base stations (also called eNBs), which can provide different sizes of coverage range. Given the user distribution in a service area, the problem of deploying heterogeneous eNBs is NP-hard. Therefore, we propose a four-stage eNB deployment strategy to efficiently solve this problem. Our strategy first employs a geometric approach to provide the basic coverage to the service area and then adjusts the cell range in order to meet the power and bandwidth constraints on each eNB. Simulation results verify that the proposed strategy can significantly save the system construction cost while balancing the loads of deployed eNBs.