ML8780A/81A を用いた W-CDMA/LTE エリア評価

1 ML8780A/81A W-CDMA/LTE . The Area-Optimization by using the ML8780A/81A . Shoji Hamao Yuji Yoshida 3G LTE LTE . 3G LTE 3G . 3G LTE .. W-CDMA LTE ML8780A/81A . MU878030B MU878040A . 1 . Summary The mobile phone system in Japan is in transit from 3G to (hereinafter referred to as the LTE) today. Then there are some radio network area using overlapped frequency band between 3G. and LTE. Further, the system as mixed 3G and LTE will continue for a few years in the future because the LTE system is accepted collateral to 3G network. The measurement instrument it can measure more stably against interference from other systems and it is necessary for special con- sideration of the difference characters between W-CDMA and LTE to analyze measurement data in those mixed network. The ML8780A/81A Area Tester with new products MU878030A/MU878040A, it is one of the best instrument for optimizing such radio network area.

2 1 . MU878040A TD-LTE . W-CDMA. SON(Self Organizing Network) [1][2] LTE .. ML8780A/81A 1 . ML8780A.. ML8781A. ML8780A/81A . W-CDMA MU878010A . 1 ML8780A ML8781A . LTE FDD MU878030A LTE . ML8780A and ML8781A Area Tester . 700 MHz 900 MHz . 2 LTE . MU878030A MU878030B LTE . W-CDMA . LTE . P-CPICH(Primary Common Pilot Channel) . SIR(Signal to LTE CQI(Channel Interference Retio) TDD . Quality Indicator) RS(Reference Signal) . LTE .. No. 89 Mar. 2014 23 (1) ML8780A/81A W-CDMA/LTE . N: . Subcarrier = 15 kHz 1 RB . = 15 kHz 12 Subcarrier = 180 kHz OFDM .. 2 LTE FDD Normal CP . Frame stracture of LTE down-link (FDD Normal CP). KPI (Key Parformance Indicator) . MU878030A/30B/40A LTE LTE. RSRP rssi rsrq SIR rssi . LTE KPI 3 rsrq (Reference Signal Received Quality). [3] LTE RS 1 RSRP rssi . 2 LTE rssi . 1 RSRP (Reference Signal Received Power) (1) . RSRP 1 15 kHz RS.

3 RS rsrq = N RSRP / rssi (1). N: 1 . RSRP 1 LTE . [MHz] 3 5 10 15 20. 6 15 25 50 75 100.. 1 RS .. rsrq RS . 2 rssi (Received Signal Strength Indicator). rssi rsrq . rssi RS OFDM Normal CP .. 1 OFDM 67 s LTE . 1 rsrq 3 dB 2. W-CDMA rssi . rsrq 6 dB .. RS . LTE RS . rsrq . PCI(Physical layer Cell Identity) rssi .. rssi . rsrq . No. 89 Mar. 2014 24 (2) ML8780A/81A W-CDMA/LTE . 4 SIR (Signal to Interference Retio). rsrq RS 1 3 LTE . rsrq rssi SIR . SIR RS 15 kHz SIR W-CDMA. LTE . RS SIR . [4] LTE SIR (4) RS . [4] W-CDMA SIR . SINR(Signal to Interference [5] . plus Noise Retio) ML8780A/81A RSRP = Iave2 + Qave2. SIR SINR SIR = {(1/M) Im}2 + {(1/M) Qm}2 (3). W-CDMA LTE SIR Iot = (1/M) {(Im Iave)2 + (Qm Qave)2} (4). SIR = RSRP / Iot (5). SIR RS (Im, Qm) RS . M RS . CP(Cyclic Prefix) .. RS . W-CDMA LTE 3 RS . 2 W-CDMA LTE 4 3 . W-CDMA RS . LTE . W-CDMA.. 1. 2 W-CDMA/LTE .

4 W-CDMA LTE . Scrambring Physicl Cell 0. Q . Code (SC) ID (PCI) -1 0 1 Common Reference Pilot CH Signal (RS) CPICH: 3840 kHz -1. (CPICH) RS: 15 kHz RSCP [dBm] RSRP [dBm] RSCP I . RSRP . 3 RS . rssi [dBm] rssi ,Io LTE rssi PCI Variation of the RS symbol from multi-path ( ). [dBm] . MU878030A/30B/40A LTE SIR . Ec/No [dB] rsrq [dB]. Iot (4)' . SIR [dB] SIR [dB] . (4)' 4 RS . SIR [dB] . W-CDMA: . LTE: 0. W-CDMA SIR CPCIH 15 kHz . (256 dB) .. No. 89 Mar. 2014 25 (3) ML8780A/81A W-CDMA/LTE . Iot = (1/4KM) |{(Rkm R(k-1)m) (Rk(m-1) R(k-1)(m-1))}|2 (4)' 1 (10 ms). 1 (1 ms). Rkm k m RS . IQ . #0 #1 #5 #8 #9. (k). DL [D] (#0, #5). UL [U]. DL UL ( )[S]. (m-1) 3 . (m). 6 LTE TDD .. Frame stracture of LTE TDD.. 3 LTE TDD Down-link Up-link [6].. Uplink-downlink Subframe configuration 0 1 2 3 4 5 6 7 8 9. 0 D S U U U D S U U U. 1 D S U U D D S U U D. 4 RS Rkm[I ] 2 D S U D D D S U D D.

5 Variation of Co-RS (Rkm[I axes]). 3 D S U U U D D D D D. 5 4 D S U U D D D D D D. MU878030B RSRP SIR 5 D S U D D D D D D D. vs RSRP/SIR 6 D S U U U D S U U D. 3 U: Uplink RSRP . D: Downlink 2 SIR S: special subframe 1 LTE TDD PCI . 0 [4] Down-link Up-link . -1 3 . -2 . -3 . 0 50 100 150 200 250 300.. [km/h]. 2140 MHz 5 MHz PCI Down-link . 2 1 s .. 5 . Measuremen data form fading influence .. 100 km/h . Down-link Up-link . 300 km/h RSRP 2 dB SIR.. 3 dB . MU878040A TD-LTE . TDD . Down-link #0 #5 . 6 3 LTE TDD . Down-link Up-link . Down-link Up-link . FDD . Down-link Up-link [6] . Down-link . Down-link Up-link 3 7 .. No. 89 Mar. 2014 26 (4) ML8780A/81A W-CDMA/LTE . LTE MHz 15 kHz . MU878030A/30B/40A LTE CPICH . MHz 15 kHz 1/256 . 3 CPICH . 1/256 dB . MU878030B MU878030A dB . 3 7 . 3 MU8780A/30B dB. MI878030A MU878030B W-CDMA . dB .. [MHz]. 8 8. PCI 40 40.

6 ( ) 10 ms/PCI 10 ms/PCI. [kg] . (WHD) [mm] 240 170 23 240 170 23. [W] 17 9. ( ) [h] . 1 2 1 . 2 ML8780A+(MU878030A MU878030B)+MU878001A.. 7 W-CMDA CPICH . MU878030A ML8780A/81A CPICH moduration of W-CDMA. 4 LTE LTE 2 RS . PCI 1 2 RS RS .. W-CDMA PCI RS . LTE PCI .. 4 W-CDMA LTE . SIR rsrq .. W-CDMA LTE SIR PCI . SIR PCI . 1 . W-CDMA 15 kHz CPICH Scrambling Code . MHz . PCI . CPICH MU878030A/30B SIR 9 dB . 15 dB SIR 9 dB . No. 89 Mar. 2014 27 (5) ML8780A/81A W-CDMA/LTE . CQI(Channel Quality Indicator) Index 0(Out of range) . [7][8] [9] 1 3 GPP Organizational Partners: Self-Organizing Networks (SON); Concepts and requirements , . , ( ). 2 3 GPP Organizational Partners: 5 Self-configuring and self-optimizing network (SON) use cases and solutions , ( ), ( ). 3 3 GPP Organizational Partners: . Physical layer Measurements , , ( ). 4 . LTE RF 5 .. 5 .. ML8720B W-CDMA 4.

7 RSRP P45 . 6 3 GPP Organizational Partners . hysical Channels and Modulation , , ( ).. 7 3 GPP Organizational Partners: . Physical layer procedures , , ( ). 8 Josep Colom Ikuno, Martin Wrulich, Markus Rupp: Down-Link System level simulation of LTE networks , in Proc. 2010 IEEE 71st Vehicular Technology Conference, Taipei, Taiwan, May 2010. Availa- . ble at: 9 3 GPP Organizational Partners: User Equipment (UE) radio transmission and reception , , ( ).. R&D .. 4 .. 5 . R&D .. 4 .. LTE .. W-CDMA LTE . LTE .. No. 89 Mar. 2014 28 (6) ML8780A/81A W-CDMA/LTE .