LTE Field Trial for LTE Mobile Network System 鬼柳広幸 箕輪守彦 あらまし LTELong Term Evolution LTE 1.7 GHz 5 MHzEnd to EndLTE 34.6 Mbps9.5 Mbps IP LTE Abstract The Long Term Evolution (LTE) mobile network system is a wireless broadband infrastructure that supports the construction of a smart ubiquitous society. Fujitsu has conducted a field trial to verify this LTE system that provides a field-proven platform for the forthcoming Cloud age, so that it can be promptly established. In this field trial, 5 MHz bandwidth in the 1.7 GHz band was used to construct an end-to-end LTE system for the global market and the area design was checked and its performance evaluated. Throughput performance of up to 34.6 Mbps for downlink and 9.5 Mbps for uplink was achieved, which confirmed that the system had adequately high performance in the field. In addition, operations of applications conventionally used in fixed IP networks were checked in the LTE system to verify they are ready for the Cloud age. This paper describes the test results of the LTE field trial. 442 FUJITSU. 62, 4, p. 442-448 07, 2011
まえがき LTELong Term Evolution LTE NTT2010 12Xi LTE フィールドトライアルの環境構築 1.7 GHz5 MHz 1.2 km/ 表 -1 LTE OFDMAOrthogonal Frequency Division Multiple AccessSC-FDMA Single Carrier-Frequency Division Multiple Access LTE / MIMO XiXi/NTT -1 / 37 DL/UL 1862.4 MHz/1767.4 MHz 5 MHz 43 dbm Tx/Rx 2/2 DL OFDMA UL SC-FDMA TM4 MIMO Closed-loop with rank adaptation DLUL Multiple Input Multiple Output 22 Closed-loopPrecoding MIMO 5 MHz 35 Mbps 9.5 Mbps LTE LTEEPCEvolved Packet Core End to End37 LTE EPC LTE 図 -1 71 LTE RRHRemote Radio Head フィールドトライアルの実施と実験成果 スループット性能 V/H2 30 m 図 -2a LTE 表 -2/ MIMO 1 2V 2 m-2b 1.5VV 図 -3a 4545-3b2 図 -4 FUJITSU. 62, 4 07, 2011 443
ア テ BBUBase Band Unit RRH EPC #3 ト ー ア ト ー LTE #2 #1 1 ト ー ア テ BBU イ トラ ト RRH ア テ BBU #2 #1 ト ー #2 RRH #1 3 2-1LTE Fig.1-LTE system structure. a b -2 Fig.2-eNodeB and test car. F G VV45 図 -5S E -2 34.6 Mbps 98.8 9.5 Mbps 100.0 1 444 FUJITSU. 62, 4 07, 2011
F G45 35 Mbps VV 25 Mbps 表 -3 V/H SINRSignal to Noise Interference Ratio VV45 20 エリアおよびハンドオーバ評価 LTE avv b45-3 Fig.3-UE antenna layout. -3 VV 45 20.7 Mbps 21.7 Mbps 27.2 Mbps 34.1 Mbps SINRV 31.8 db 37.7 db SINRH 29.8 db 36.8 db 0.64 0.18-4 Fig.4-Drive test route. スルー ト Mbps S 35 30 25 20 15 10 5 A B C D E F 通 V V 45 通 G 0 200 400 600 800 1000 1200 1400 m -5 Fig.5-DL throughput. FUJITSU. 62, 4 07, 2011 445
H.O H.O 表 -4 95 H.O 95 H.O H.O H.OH.O H.O H.O H.O 屋内性能 図 -6 20 MbpsLTE MIMO Energy Savings Energy SavingsESSONSelf-Organizing Network 3 1ES 2 表 -5ES 3 RSRPReference Signal Received Power ESRSRP offbrsrp RSRP-120 dbm ES ES44 95-6 Fig.6-DL throughput (Indoor Env.). -5ES -4 95 95 ES 1.00 0.44 1 99.5 97.8 RSRP-120 dbm 446 FUJITSU. 62, 4 07, 2011
TV イ -82010 Fig.8-Wireless Japan 2010 exhibition. 自然エネルギー供給 2 図 -7 アプリケーション動作環境の検証 LTE IPTV IP-9500 LTE LTE TV 20102010 図 -8 LTETV LTE -7 Fig.7-Hybrid power generater. TVLTE むすび End to EndLTE FUJITSU. 62, 4 07, 2011 447
Energy Savings IP LTE 参考文献 1 LTE MIMO 2010 B-5-43 2 LTE 2010 B-5-44 著者紹介 鬼柳広幸 ( きやなぎひろゆき ) 箕輪守彦 ( みのわもりひこ ) 448 FUJITSU. 62, 4 07, 2011