講演抄録/キーワード |
講演名 |
2016-05-16 14:30
[ポスター講演]An Experimental Study on Network-Listening Based Synchronization with Loop-Back Self-Interference Canceller ○Sho Nabatame・Mitsukuni Konishi・Atsushi Nagate・Teruya Fujii(SoftBank) SR2016-4 SRW2016-4 |
抄録 |
(和) |
(まだ登録されていません) |
(英) |
The overlaid cell structure, in which a large number of small cells are deployed in a macro-cell coverage area, is considered to be a promising approach in order to accommodate rapidly increasing mobile data traffic. In the overlaid cell structure, eICIC (enhanced Inter-Cell Interference Coordination) is an essential technique to avoid the interference between the macro cells and the small cells when co-channel deployment is used. Because eICIC conducts interference coordination in the time domain, accurate timing synchronization is required between the macro cells and the small cells. We have proposed a network-listening based synchronization method, which enables accurate synchronization even indoors without receiving GPS signal. In the proposed method, a small-cell eNB receives a macro-cell downlink synchronization signal and establishes synchronization with the macro-cell eNB. However, we need to update synchronization periodically and receive a macro-cell signal even while there is a loop-back interference signal from the small-cell eNB itself. In order to solve the problem, we have proposed a method to mute the transmission and avoid loop-back self-interference. Although this works well, it is an issue that the spectral efficiency is deteriorated by the signal stopping. In this paper, we propose a synchronization method that cancels loop-back self-interference without stopping the transmission of small-cell eNB and clarify the effect of the proposed method by computer simulations and laboratory experiments using the first-ever prototype system. |
キーワード |
(和) |
/ / / / / / / |
(英) |
LTE-Advanced / Layered cell configuration / HetNet / Small cell / Timings synchronization / Network listening / Radio-interface based synchronization / |
文献情報 |
信学技報, vol. 116, no. 29, SR2016-4, pp. 9-14, 2016年5月. |
資料番号 |
SR2016-4 |
発行日 |
2016-05-09 (SR, SRW) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
SR2016-4 SRW2016-4 |
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