前瞻長程演進異質性網路的頻譜與能源效率之分析

Abstract

在此篇論文中，我們探討應用階層式基地台合作技術之第三代合作夥伴前瞻長程演進異質性網路系統的頻譜與能源效率。我們發現同時考慮系統架構與合作傳輸方法的設計能夠達到綠能傳輸之目的。因為基地台合作之技術可以有效降低共同通道干擾與改善接收訊號品質，且系統架構對於系統之表現有相當的影響。特別是考慮了同時結合細胞間與細胞內基地台合作之方法。這篇論文呈現了利用上述之聯合設計方法於應用階層式基地台合作技術之異質性網路系統表現的改善。模擬結果顯示，採用我們提出的聯合設計方法之異質性網路系統比起傳統單用戶多輸入多輸出系統是一個有效提高頻譜與能源效率的方法。

In this thesis, we investigate both spectral and energy efficiency of hierarchical base station cooperation techniques in heterogeneous networks (HetNet) of the 3rd Generation Partnership Project (3GPP) Long Term Evolution-Advanced (LTE-A) system. We find that joint consideration of system architectures and cooperation schemes will achieve energy-efficient transmission. Because the co-channel interference can be mitigated significantly and the signal quality is able to be improved through base station coordination techniques, and the system architecture has great impacts on system performance. Especially, coordinated multi-point (CoMP) techniques of different levels, e.g., intra and inter-site CoMP, are considered jointly. We address the performance improvements of HetNet system with hierarchical base station coordination techniques by the joint design of both system architecture and coordinated transmission scheme. The proposed joint design methodology is a promising solution for improving spectral and energy efficiency compared to the conventional single user multi-input-multi-output (SU-MIMO) system.