利用混合式天線分配之 LTE 異質網路 UE 與 MIMO 模式選擇

異質網路與多用戶多輸入輸出技術被視作是下一代通訊網路對頻譜使用效率問題可能的解決方案，兩者未來也勢必並存於同一系統中。而異質網路中的用戶，其服務品質很容易受到鄰近基地台的干擾，限制了系統的整體效能。對此 3GPP LTE 標準提出了增強型細胞間干擾消除機制，同時使用多點協調來降低基地台間的干擾。現今的研究多將多用戶多輸入輸出與多點協調視作兩個獨立的傳輸模式，根據排程器的決策在兩者間進行切換，缺少了混合兩者的相關研究。我們無法保證每次排程都能選到足夠且適當的多點協調用戶，導致基地台產生天線閒置的情形。本文提出了在異質網路中考慮用戶通道狀況與公平性後，挑選數個用戶同時進行多用戶多輸入輸出與多點協調的混合式天線分配排程器，並以模擬方式提供各種傳輸模式下的數值比較作為排程方法的驗證。

關鍵字

長期演進技術；異質網路；多用戶多輸入輸出；多點協調

並列摘要

Heterogeneous networks (HetNets) and Multi-user MIMO (MU-MIMO) are possible solutions for spectrum efficiency problem in the next generation mobile communication. They will coexist in the future. However, the users in HetNets are sensitive to inter-cell interference, limit the system performance. Thus, 3GPP LTE designs enhanced inter-cell interference coordination (eICIC) and uses coordinated multi-point (CoMP) to cancel the interference. Recently works consider MU-MIMO and CoMP as two transmission modes and switch them by scheduling, do not have a mode mix two. It cannot commit to find enough appropriate CoMP users in every scheduling duration, results to the existence of idle antennas . In this paper, we proposed a mixed antenna allocation scheduler that take channel qualities and fairness in consider to select several users to do MU-MIMO and CoMP at once. We provide simulation results based on different transmission modes for comparing, verify the method we proposed.

並列關鍵字

LTE ； HetNets ； MU-MIMO ； CoMP

參考文獻

[1] 3GPP TS 36.211 V12.5.0 (2015-03) Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels and modulation

[4] Lindbom, Lars, et al. "Enhanced inter-cell interference coordination for heterogeneous networks in LTE-Advanced: A survey." arXiv preprint arXiv:1112.1344 (2011).

[6] Soret, B.; Hua Wang; Pedersen, K.I.; Rosa, C., "Multicell cooperation for LTE-advanced heterogeneous network scenarios," Wireless Communications, IEEE , vol.20, no.1, pp.27,34, February 2013

[7] Deb, S.; Monogioudis, P.; Miernik, J.; Seymour, J.P., "Algorithms for Enhanced Inter-Cell Interference Coordination (eICIC) in LTE HetNets," Networking, IEEE/ACM Transactions on , vol.22, no.1, pp.137,150, Feb. 2014

[8] Somasundaram, K., "Proportional Fairness in LTE-Advanced Heterogeneous Networks with eICIC," Vehicular Technology Conference (VTC Fall), 2013 IEEE 78th , vol., no., pp.1,6, 2-5 Sept. 2013

國際替代計量

利用混合式天線分配之 LTE 異質網路 UE 與 MIMO 模式選擇

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