GTT LTE RRU ADD-‐ON
Contents
1. Generation E 7 MA E IQ Source Digital Scaling Activate IQ Source DL Resource Element Map CCDF Trace A NL amp EE pL Signa Generation Ears 1 c B 600 100 E g 500 x 10 La an i m Signal configuration according to DL RF acquisition settings 300 71 8 EE EA CPRI Generation Status E Downlink Test Model Signal Bandwidth DL Duplex Mode DL gor E dam ETM3l XM mop 0 001 3 E ype a a NCEE E EUER Generation Status ra O 20 40 60 80 100 120 140 Es Symbols Power dB eration dle a z Status E CPRI Error Log E CPRI port CPRI line bit rate 5 No Error R 3 On G 2457 6 Mbit s 2 CPRI link state E WicOpenston fectve ink CSM channel avaiable cen Link state Link Failure Detected CPR Error status L STOP Figure 1 CPRI Configuration Establish the CPRI link with the Activate CPRI Link button LTE RRU Add on User Guide 522A1 SP04002 1 V1 0 0 2015 09 28 4 On first call after powering up the PXI system the FPGA image for the 6592R will be loaded which takes a few seconds e Verify that there is no error shown in the CPRI Error Log e Check that CPRI Port Active and CPRI Link State is showing a green LED e The Status section also shows the current line bit rate and CPRI link state e If Re establishment CPRI Link is set to Yes the CPRI fiber cable can be removed and re attached interactively The current status will be updated in the GUI ES RRH LTE Demowi S fmi File Edit View2. Library User Code 1 LabVIEW Library User Code 2 For further information refer to the preferred tool for activation 4 HW Setup Connect the RRU to the RF port of the VST Note Maximum absolute input power VST RF in 33dBm peak The CPRI communication is connected to 6592R 5 Example This chapter shows example of how the code can be used T RRH LTE Demowi o File Edit View Project Operate Tools Window Help ae gt 3e PILAA E HW CORIDevi Re establish CPRI Link i MAD meets 10 Sway Sampling R evice ai isi inl Activate CPRI Link its per Sample Q Swap suid ate anion etc 5 E esso Ere 1 C E 5 16 Bits El Enabtea E 1536s 5 S Acquisition 5 Acquisition Length Acquisition Unit Start IQ Aquisition Number of Hyper Frames Target Power Antenna Port dBFS to dBm Offset m D m m S Sa 5 Radio frames cC E 150 E sts dBm z Port 2 2 60 00 dB 5 e 3 CPRI Data CPRI Data Graph Signal Spectrum of Demapped Data 3 FFFFFFFF 24 3 Eo000000 H coo00000 z vu 3 E ud S 160 3 3 3 am 5 ae 3 300 CPRI Aquisition Status M eoo o QM 100000 200000 300000 400000 500000 614399 L6M 6M 4M 2M 0 2M 4M 6M 7 68m 9 z Data Word Relative Frequency Hz Acquisition Idle 8 5 a
3. Running Lis A EEE 0 20 4 60 80 100 120 140 Symbols Status UL BLER Measurement DL RF Measurements CPRI Error Log CPRI port CPRI line bit rate No Error a On G 2457 6 Mbit s CPRI link state P Operation active link C amp M channel available CPRI Link State 4 Link Failure Detected CPR Error status STOP Figure 3 CPRI Signal Generation and Acquisition Single acquisition of the CPRI data stream and contained signal can be carried out with the Start IQ Acquisition button The state of the acquisition is indicated with a LED and a textual display The CPRI frame data is provided as an array and as a data graph The spectrum of the de mapped IQ samples is provided as well The target power of the received signal at the RRH can be set according to the RF configuration within a range of about 27dB The acquisition length is limited to 10 radio frames 10 ms to limit memory consumption For signal generation select the type of signal to be generated The possibilities are a CPRI frame read from file a generated DL LTE test signal or a single multi tone signal In case of DL LTE test signal the resource map and the CCDF of the generated signal is shown The signal generation is started with the Activate IQ Source button and remains active until the button is disabled again The Digital Scaling can be used to adjust the digital power of the signal e g for the RadioComp use 18 dB for DL LTE
4. 15 475 2 1 Mo g amp a Bl STOP Figure 4 UL Bler Measurements This tab is used to carry out UL BLER measurements which involve decoding the actual contents of the received signal from the RRH The default settings are matching the ones from the RF configuration tab and reflect the parameters of an RX sensitivity test according to 3GPP TS36 141 with a target of less than 5 of BLER more than 95 of data throughput The total test time for 2 5 seconds of the test signal is less than 5 seconds including fetching the data from the RRH and the PXle 6592R also includes processing time required for the GUI the actual decoding is just about 2 seconds BLER Decoded TBs and the PUSCH constellations are updated on a LTE subframe basis 1ms Select the received power at the RRH with the slider The range is derived by the programmable RF attenuator the RF ouput power at the VST RF out and the external attenuation LTE RRU Add on User Guide 522A1 SP04002 1 V1 0 0 2015 09 28 7 S RRH LTE Demowi Eee Ex File Edit View Project Operate Tools Window Help ERR CECI epa s CPRILink Options CPRI Mapping Options Decoder Configuration CPRILink Status 2 Link Configuration CPRI Map Option 1 Configuration DMRSInfo CPRI Link Status t S CPRiportmode CPRI ine bit rate PUSCH nDMRSL CPRI port E CPRI master mode 3 2457 6 Mbit s y not specified O CPRlline bitrate fs n H EUSGEL R
5. Failure Status 0 Extended CPRI Link Status rn o CPRI link failure state amp A Standby r7 ien a Local LOS RemotelOS sep Tx Fault rm pis z Marker Configuration E LoclLOF RemoteLOF SFP Los pem IAN S ns E None 5 Local Ral Remote RAL EAR paene ns amp ZI PX Trigo EN a a STOP Figure 5 Advanced CPRI Configuration and Status This tab offers setting of advanced configuration options The CPRI Link Option section contains settings for the CPRI link e g master slave mode line bit rate slow fast C amp M plane configuration Additionally extended settings like loopback mode and selecting CPRI port are available Furthermore certain timeouts for the CPRI link establishment can be changed The CPRI Mapping Options contains settings for the mapping and de mapping of IQ data into the CPRI frame format e g bit width numeric representation number of AxC AxC container position The CPRI Link Status shows detailed information about the status of the CPRI link including information about the negotiated line bit rate C amp M plane settings as well as information about certain delays The CPRI Link Failure Status displays the last CPRI link status before the link failure was detected In can give some hints what would have caused the link failure The Marker Configuration control can be used to specify an event signal that is exported to a front panel connector or to the
6. GTT LTE RRU ADD ON USER GUIDE E RRHLTE Demowi File Edit View Project Operate Tools Window Help e Jp z Configuration 5 3 UL Test Model TBs to decode RNTI RB Offset 5 EJ a z _ Target Power dB iE ene a13 SmmULBLERAnayss TtgetPower dbm 5 8 Ef s191 z UL Bandwidth ULDuplecMede CellID AC gt pe a a once p Ss 1 S fra 119 116 114 112 110 108 106 104 102 100 98 96 94 92 pa Eim Ero Br ER l s ki 5 BLER Results EJ is 5 o 3 Decoding Progress Constellation Diagram a BLER s a 2 100 18 3 2 16 i 144 5 24 BLER GO ENEEH c 0 84 9 B 06 30 a 7 ES RRH LTE Demowi SEI ERG 7 Decoded TBs C50 EO T E tose T rep H Eye gt Dad E HW PRID Re establish CPRI Link a poner 105 Sampling Rate 5 s eet F F A 3 E evice went ink Activate CPRI Link its per Sample 1Q Swap Sampling YES 5 5 fesor o Efe 16 Bits Ei femstrea Ams Test Time s 2 S Acquisition 5 S Acquisition Length Acquisition Unit Start IQ Aquisition Number of Hyper Frames T
7. OMS CPRI link state s G 2457 6 Mbit s 715360000 y not specified CPRiscrembling M in bits RESGHUDeSS CPRI port mode No dis i not specified T DMRS Hopping Enabled 8 Scrambling seed T IQ data format CPRI line bit rate 3 00000000 Ifrired point frase EEE 5 Slow C amp M plane HDLC fixed point format DMRS Hopping Mode s E p ed point form CPRI protocol version mmoc M fill MSB in bits J Group Hopping not specified HDLC bit rate preferred 0 CPRI scramblin a g 3 0 kbit s Min n bits Turbo decoder config not specified t Fast C amp M plane Ethernet A Decoder Type Scrambling seed R 2 Ethernet Mill LS8 in bits Jl MAX LOG Star Fooooo000 gt Ethernet pointer preferred ao Half Iterations Scrambling seed Tx 53 z f floating point format gt 00000000 2 CPRI Port Slow C amp M plane HDLC 5 Lin in bits P B Extended Link Configuration Number TE not specified Z Re establish CPRI link after failure g HDLC bit rate y Nin in bits Yes Link Stable C not specified 5 ignore k char Timeout ims Fast C amp M plane Ethernet No 8000 Ene not specified 2 enable loopback Ul Em m actual Ethernet pointer o imeout ms jit it 3 Disable A Fees contine mp png not specified 20000 Zl Option 1 packed position Y Wot Rak pnict AC Oninc Tag Maximum achievable Ethernet bit rate Mbit s rry of start positions of AxC containers in bits a NaN 2 CPRILink Failure Status o 2 CPRI Link
8. PXI backplane The Decoder Configuration allows tweaking specific parameters related to the UL decoder The DMRS Info parameters control certain aspects of the demodulation reference signal The Turbo Decoder Config changes the behavior of the turbo decoder LTE RRU Add on User Guide 522A1 SP04002 1 V1 0 0 2015 09 28 8 RH LTE Demow File Edit View Project Operate Tools Window Help Tm een spa Read Vendor Specific Subchannels Remote Read Subchannels Get ORI Fields Remote MAC Address 6xU8 ORI Port Number cC E c m Vendor Specific Fields Ns 16 63 Xs 0 3 Tee Teo Te To To To Te Tos Toe TT To Tes Toe Toe Too Teo Foo Foo Tod ees eoe To Tes To Tes To Te Fo Te Fo Te FT TT Te To Te To To To Te To Teo To To To Te B e Tes Tes To To To To To To Too oo oo Too Too Too Too T5 Teo Teo Too To To To To To Too Too oo oo oo To To To To To To To To T T To To To Too Tos To Todo To To To To To T To To To Te To To To1 e IoTeTeToToToTe Te ToTe Te To To To To To To To ToTe Te To To Te Te Te To Te Te To Te Te ToTo Te To ToTe Teo To To Te Te To To eToToTe Te Te To To Te To To Te Te To To To pope To ToToTo To To ToTe Te To To To To 9 To To To ToTe Teo To To To To To To Te To To eT To ToTo Te To To Te To To To To To To To e ToToTe Te To To To Te To To Te Te To To To Advanced Configuration CPRI Con
9. Project Operate Tools Window Help 00000 LEER Sou aN Setup RRH Configuration IP Address 39 99 12 56 Login Prompt Advanced Configuration CPRI Configuration Password Prompt pas Password omman Prompt gt gt Communication Script File f CARRH LTE Dem Configuration Files default csv ta Send Script BI clearLog Command Input get radiostatus quency TX 24655 GHz Carrier frequency RX 2535 GHz 10 lte MHz on normal UL BLER Measurement DLRF Measurements RF Configuration DUT Control Vendor Fields a STOP Figure 2 DUT Control e Check the Ethernet connection to the RRH by issuing the help command e Ifthe connection is valid send the initialization commands to the RRH by using the Send Script button This needs to be done only once after powering up the RRH e Other commands can be used at any time e g o get radiostatus to show current RF frequencies and RF bandwidth o get linkstatus to show status of the CPRI link The setup drawing shows an overview of the RRH test setup using the PXI platform e Do not change the RRH configuration unless you know what you are doing LTE RRU Add on User Guide 522A1 SP04002 1 V1 0 0 2015 09 28 5 E RRHLTE Demowi fl te e H File Edit View Project Operate Tools Window Help RR pgs se
10. arget Power Antenna Port dBFS to dBm Offset 8 z Bl E Radio frames 1 C B pn 91 91 dBm B Port2 60 00 dB 2 zx Decoder Erer Log CPRI Data CPRI Data Graph Signal Spectrum of Demapped Data a WDR FFFFFFFF a4 E E0000000 t 5 C0000000 z a 2 s EJ 5 annooo0n 160 3 fe E 80000000 i 3 B amp Eu E amp soono i z 425C5555 40000000 200 CPRI Aquisition Status 3 EJ prsossss 20000000 m D gp gg pl E E 3 O 100000 200000 300000 400000 500000 614399 L6M 6M AM 2M 0 M M 6M 168M t jo Data Word Relative Frequency Hz 3 5 a Generation E IQ Source Digital Scaling Activate IQ Source DL Resource Element Map CCDE Trace MERE MR SI DL Signal Generation 8 dB o 600 100 2 2 500 xo t E 400 B 4 2 Signal configuration according to DL RF acquisition setti an E E Eon m o CPRI Generation Status E Downlink Test Model Signal Bandwidth DL Duplex Mode DL E oo e i ETM3 1 l 10M l ES 3 STM 31 DL OD 2 001 ii 3 z Wp pg oy mx arm Generation Sets A 9 20 4 0 00 100 120 140 DES ES ibols Power dB jeneration Running a Sym oK Status Fi CPRI Error Log E CPRI port CPRI line bit rate T E lo Error n A On G 2457 6 Mbit s z CPRI link state A P Operation active link C amp M channel available cont ink state Link Failure Detected CPR Error status 3 m STOP a Gefle Testteknik Copyright 2015 Gefle Testteknik AB All rights reserved Under the copyr
11. by Ethernet and may not be used for vendor specific data Each vendor specific field can use up to 16 bytes line bit rate 8 For lower line bit rates the number of useable bytes is lower than 16 bytes Vendor specific data can be written as soon as the CPRI session is active such that the data is already available during CPRI link establishment 6 User Interface Refer to context help for details LTE RRU Add on User Guide 522A1 SP04002 1 V1 0 0 2015 09 28 9
12. ed SFPs are by default located at C Program Files x86 Gefle Testteknik TE RRU The installed APIs are by default located at National Instruments LabVIEWInstallDir vi lib Gefle Testteknik LTERRU Note The system supports Windows 7 64 bit For other Windows versions please contact sales testteknik se for latest status 3 1 To activate deactivate a license The distributed executables and the GTT LabVIEW libraries Ivlib are licensed and have an evaluation period of 30 days and must then be activated for continued use The license is locked to the computer that is used during installation We recommend using GTT licensing toolkit for activation of licenses The built in activation tool in Labview may also be used Be aware that licenses activated in Labview versions older than 2014 cannot be transferred at a later date should it be needed To transfer a license it must first be deactivated on the system where it is currently active before activation on the new system When restoring the computer from a backup image deactivation must be performed before deleting the old system A product can be manually activated i e offline by sending an email to sales testteknik se in the following format NOTE that manually activated licenses cannot be deactivated or transferred LTE RRU Add on User Guide 522A1 SP04002 1 V1 0 0 2015 09 28 3 Company Name User Name Executable User Code 1 Executable User Code 2 LabVIEW
13. en p CPRID Re establish CPRI Link CANES gerne QS Sampling Ra corna Re establis ink Activate CPRILink Bits per Sample x IQ Swap Sampling Rate rsen E a fem zr 5 Essor J Birs l C gt Blas eis ElEnabtea J z 1536 5 J ength Acquisition Unit StartIQ Aquisition Number of Hyper Frames Target Power Antenna Port dBFS to dBm Offset B Radio frames J Emo 5 Eier aom Port 2 60 00 aB CPRI Data Graph Signal Spectrum of Demapped Data ecs FFFFFFFF 204 2EFFFFFF 0000000 ATAAAAA c0000000 35010000 3 aoopo000 BAAAAA soooooo0 CC080000 amp 60000000 42565555 40000000 CPRI Aquisition Status DF505555 20000000 64515555 00000000 T D T n mo n n 1 1 d 100000 200000 300000 400000 500000 614399 L68M 6M AM 2M D 2M AM 6M 69M Acquisition Status U Data Word Relative Frequency Hz Acquisition Gener RF Configuration DUT Control VendorFields Advanced Configuration CPRI Configuration ration Resource Digital Scaling Activate IQ Source DL Resource Element Map ccoF Toce ONV Ro vgl Z DL Signal Generation z 18 aB gt 100 xe apo x w So H Signal configuration according to DL RF acquisition settings E CPRI Generation Status DownlinkTestModel Signal Bandwidth DL Duplex Mode DL 7 emai m meo Fi Ural L eN TEE PAEA O UE 2 4 6 8 d 12 14 i 1 Generation Status Power dB Generation
14. figuration Write Vendor Specific Subchannels Write Subchannels Set ORI Fields MAC Address 6xU8 ORI Port Number 2 r A m oo Foo Eo Eo Eo Eo g Vendor Specific Fields Ns 16 63 Xs 0 3 UL BLER Measurement DLRF Measurements RF Configuration DUT Control Vendor Fields a STOP Figure 6 Configuration of Vendor Specific Fields This tab can be used to read and write the CPRI subchannels that are defined for vendor specific data Vendor specific data starts at subchannel 16 and can span up to subchannel 63 depending on whether fast C amp M is used and what configuration is used for the fast C amp M Ethernet pointer Each vendor specific field can use up to 16 bytes line bit rate 8 For lower line bit rates the number of useable bytes is lower than 16 bytes Please refer to the CPRI specification for additional details e Use the read subchannels button to read in all subchannels defined for vendor specific data The rows mark the parameter Ns 16 to 63 while the columns define Xs 0 to 3 Please note that the upper rows might be used by Ethernet and may not contain useful vendor specific data e Use the write subchannels button to write vendor specific data for all subchannels that are defined for vendor specific data The rows mark the parameter Ns 16 to 63 while the columns define Xs 0 to 3 Please note that the upper rows might be used
15. ight laws this publication may not be reproduced or transmitted in any form electronic or mechanical including photocopying recording storing in an information retrieval system or translating in whole or in part without the prior written consent of Gefle Testteknik AB Gefle Testteknik respects the intellectual property of others and we ask our users to do the same Gefle Testteknik is protected by copyright and other intellectual property laws LTE RRU Add on User Guide 522A1 SP04002 1 V1 0 0 2015 09 28 2 1 Introduction GTT RRU Add On enables analysis of the radio performance of Radio Remote Units RRU using the CPRI standard The product uses the NI PXle 5644R 5645R 5646R Vector Signal Transceiver VST family and the NI PXle 6592R High Speed Digital I O HSDIO card featuring the Common Public Radio Interface CPRI In the Down Link DL direction data can be sent via the CPRI interface and analysis of the radio performance is made using the GTT LTE RBS Toolkit In the Up Link UL direction the system enables demodulation of the received LTE signal to measure for instance Block Error Rate BLER The system is built on the Labview 2014 platform 2 System Requirements See http testteknik se content product for a list of SW and HW requirements for the product 3 Installation Start LabVIEW and VIPM with administrator rights and start the installation of the LTE RRU using VIPM 2014 or newer The install
16. signals and 36 dB for CW signals Similar to signal acquisitions the state of the generation is indicated with an LED and a textual display The configuration of the DL LTE signal e g bandwidth duplex mode test model depends on the settings for the DL analysis which can be found on the RF Configuration tab LTE RRU Add on User Guide 522A1 SP04002 1 V1 0 0 2015 09 28 6 ES RRH LTE Demo vi c J amp fme File Edit View Project Operate Tools Window Help o S FDAN x Configuration UL Test Model TBs to decode RNTI RB Offset 2 te cars J Enso lj s 124 Jj ls fo lj Start UL BLER Analysis _atget Power dBm een ay LE 5121 z UL Bandwidth UL Duplex Mode Cell 1D AC 88 O E 5 E o OA ofa J T us n 114 112 110 108 106 104 102 100 98 96 94 92 Bome Ef I B I BE J i Jj i J i s kd E BLER Results o 5 3 E Decoding Progress Constellation Diagram RUSCH P piers f X S z M1 2 w 184 3 E 164 T 144 E O 124 BLER 9 NENNEN C z ao a84 o E i 06 1 2 0 4 z Decoded TBs 2500 aa 2 M ES E D g 0 24 5 n t 0 4 Test Time s 83 259 064 2 SaaS 08 1 5 4 2 124 Decoder Error Log ae ep Besse a No Error E 18 2 4 1 i i i 1 i 1 1 1 1 1 i s 2 H5 45 25 1 915 05 025 0 0 25 05 0 75 1 10
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