Agilent PXT Wireless Communications Test Set (E6621A) User’s Guide
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WARNING This is a Safety Class 1 Product (provided with a protective earthing ground incorporated in the power cord). The mains plug shall only be inserted in a socket outlet provided with a protective earth contact. Any interruption of the protective conductor inside or outside of the product is likely to make the product dangerous. Intentional interruption is prohibited. WARNING No operator serviceable parts inside. Refer servicing to qualified personnel. electrical shock do not remove covers.
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Table of Contents 1 Introduction ............................................................................................................................................ 1 Agilent E6621A PXT Overview ................................................................................................................................... 1 Base Station Emulator (BSE) .................................................................................................................................
Emulator Mode....................................................................................................................................................... 17 Config............................................................................................................................................................................ 18 RF Setup .........................................................................................................................................................
Trigger Output ........................................................................................................................................................ 67 Sweep ...................................................................................................................................................................... 68 Help ................................................................................................................................................................
RRC – Key Menu 3............................................................................................................................................... 116 NAS Settings ........................................................................................................................................................ 120 Security – Key Menu 1........................................................................................................................................
LTE to LTE Handovers.............................................................................................................................................. 163 Testing Two Cells Using One PXT .................................................................................................................... 165 Blind Handover..................................................................................................................................................... 169 PXT to PXT Handover.....
Attempting Cat 4 setup / performance on a Cat 3 device at high end rates ............................................ 225 Faulty RF cable or connectors. .......................................................................................................................... 226 Performance of E2E data is not as expected – high IP packet loss on high end bitrate tests ................... 226 Performance of E2E data is not as expected – TCP performance poor. ..................................................
Agilent PXT Wireless Communications Test Set User’s Guide 1 Introduction Welcome to the User’s Guide for the Agilent E6621A PXT Wireless Communications Test Set (PXT). The purpose of this guide is to provide you with what you need to know after you have finished performing the setup procedures described in the Getting Started Guide, that you received with your test set. It also provides key menu descriptions, measurement examples, LTE concepts, and where you can go to get additional help information.
Agilent PXT Wireless Communications Test Set User’s Guide General Capabilities of the Agilent E6621A PXT • Frequency Division Duplex (FDD) and Time Division Duplex (TDD) options • Real-time 3GPP LTE downlink (DL) signal modulation and uplink (UL) demodulation • eNodeB simulation with L1, L2 and L3 protocol stack • Settable eNodeB, UE, and network operation parameters • Settable frequency, power and modulation schemes • SISO and MIMO testing capabilities • Connection to Agilent 89600 VSA software for greate
Agilent PXT Wireless Communications Test Set User’s Guide Power Requirements Input Voltage Range: 100 to 240 VAC, automatic selection Input Frequency Range: 50/60Hz Input Current Rating: 5A @ 240 VAC (maximum) 7A @ 100 VAC (maximum) WARNING This is a Safety Class 1 Product (provided with a protective earthing ground incorporated in the power cord). The mains plug shall only be inserted in a socket outlet provided with a protective earth contact.
Agilent PXT Wireless Communications Test Set User’s Guide Agilent N6061A Protocol Logging and Analysis This application software is developed for use on systems running the Microsoft (MS) Windows XP or Windows 7 operating systems. It displays and stores protocol and event logs of Agilent E6621A PXT. The stored log files can be replayed and analyzed using this software and other advanced post-processing tools. Please consult the Agilent LTE Protocol Logging and Analysis User’s Guide for more information.
Agilent PXT Wireless Communications Test Set User’s Guide 2 Front-panel and Menu Keys This chapter outlines the front-panel key menus for the E6621A PXT in the Base Station Emulator mode. All frontpanel keys are listed in alphabetical order. All other keys (menu keys) are listed in the order they appear in their menu (that is, not in alphabetical order).
Agilent PXT Wireless Communications Test Set User’s Guide Amp (Amplitude) This front-panel key displays the following menu of keys. Amplitude RF1 Amplitude RF2 Amplitude RF1 Amplitude (RSTP) RF2 Amplitude (RSTP) AWGN Key Path: Front-panel key Amplitude Sets the RF1/RF2 power level(s) in dBm. This amplitude level represents the integrated power level, assuming all resource elements in the bandwidth are occupied. It is sometimes called Channel BW Power (see 36.521-1 Appendix C.
Agilent PXT Wireless Communications Test Set User’s Guide Mode BSE. SA Range −120 dBm to +10 dBm Preset −57 dBm State Saved Yes Dependencies and/or Couplings Coupled to RF1/RF2 Amplitude Initial S/W Revision 6.0 Key Path Amp RF1 Amplitude Sets the output power level in dBm for RF1. The specified output power for the RF out port is −110 dBm to −10 dBm. The specified output power for the RF in/out port is −110 dBm to −15 dBm. Mode BSE.
Agilent PXT Wireless Communications Test Set User’s Guide RF1 Amplitude (RSTP) The value displayed on this menu key is read-only and is the RF1 amplitude expressed as an RSTP power level determined by the following equation: RSTP = Cell Power – 10 log10 (number of subcarriers in the bandwidth) Mode BSE. SA Range −150.79 dBm (for 20MHz Channel Bandwidth) to −14.77 dBm (for 5MHz) Preset − 84.
Agilent PXT Wireless Communications Test Set User’s Guide AWGN AWGN, also referred to as N oc , in 3GPP specifications, is defined as the power spectral density of a white noise source (average power per resource element (RE) normalized to the subcarrier spacing), simulating interference from cells, as measured at the UE antenna connector. Note that the AWGN is determined by using a signal to noise ratio relative to the cell power.
Agilent PXT Wireless Communications Test Set User’s Guide Signal to Noise Ratio (RF1) Specifies the desired signal to noise ratio for antenna port 1. Using the current amplitude, this value determines the power level of AWGN applied to the signal. Mode BSE, SA Range −10 to +30 Preset 0 Initial S/W Revision 6.3 Key Path Amp > AWGN Signal to Noise Ratio (RF2) Specifies the desired signal to noise ratio for antenna port 2.This value is based on the current amplitude and sets the power level of AWGN.
Agilent PXT Wireless Communications Test Set User’s Guide Noc (RF2) Displays the resultant value of AWGN power level relative to a single resource element (as described in 3GPP 36.521-1) for antenna port 2. This is the power level of AWGN relative to a single resource element, given the SNR RF2 and cell power setting. Most of the RF conformance tests are expected to use (AWGN) = −98 [dBm/15kHz] where the bandwidth is set equal to the serving cell channel bandwidth profile.
Agilent PXT Wireless Communications Test Set User’s Guide AWGN MIMO Channel Mode Enables you to set the AWGN for a MIMO model or for a Normal model (not MIMO). MIMO: Sets AWGN for both paths of the MIMO channel setup. Normal: Sets AWGN for normal channel setup. Mode BSE, SA Range MIMO | Normal Preset Normal Initial S/W Revision 6.3 Key Path Amp > AWGN Atten – Key Menu 1 (Attenuation) Accesses the settings that enable you to control the receiver level(s).
Agilent PXT Wireless Communications Test Set User’s Guide RF1 Ref Level Sets the expected receiver level for RF1 when you wish to specify different values for RF1 and RF2 inputs. Otherwise, this value is set by pressing Atten > Ref Level. Mode BSE. SA Range -120 dBm to +10 dBm Preset -57 dBm State Saved Yes for BSE mode. No for SA mode. Dependencies and/or Couplings Grayed out when Atten > Attenuation is set to Adaptive. Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Mode BSE, SA Range Auto | Manual | Adaptive Preset Auto Dependencies/Couplings This menu key is coupled to RF1 Input Attenuation settings. Initial S/W Revision 6.0 Adaptive attenuation was added in software revision 6.4. Selecting Func > UE Power Control > CLCP sets Attenuation = Adaptive but the reverse is not true.
Agilent PXT Wireless Communications Test Set User’s Guide DO NOT SIMPLY SET Power Adjust (All Down) = Off. This results in a dropped connection (under investigation), because the PXT adjusts the attenuator too high. To alleviate this issue, always switch back to the setting: Power Adjust (All UP) = On briefly, before leaving this screen.
Agilent PXT Wireless Communications Test Set User’s Guide Atten – Key Menu 2 (Attenuation) Accesses the following settings. Scale/Div IDLE_ADJUSTER CONNECTED_ADJUSTER OVF_ADJUSTER Key Path: Front-panel key Scale/Div Sets the units per vertical graticule division on the display. Mode BSE, SA Range 1 dB to 20 dB Units dB Preset 10 Initial S/W Revision 6.0 Key Path Atten > More IDLE_ADJUSTER This parameter is automatically set by the PXT when Attenuation is set to Adaptive.
Agilent PXT Wireless Communications Test Set User’s Guide CONNECTED_ADJUSTER This parameter is automatically set by the PXT when Attenuation is set to Adaptive. This value is an adjustment applied to the expected input value when the UE is in the connected state. Mode BSE Overwrites Scenario File Value Yes Range -30 to 30 Units dB Preset 0 Dependencies and/or Couplings Available only when Attenuation is set to Adaptive. Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Mode BSE Range Run | Stop Preset Stop Initial S/W Revision 6.0 Key Path Mode > BSE Config (Configuration) This front-panel key displays the following menu of functions: RF Setup Network Setup Cell Setup External Sync Amplitude Offsets General Config Key Path: Front-panel key RF Setup Accesses the available parameters you can set to configure the RF in the BSE mode. Refer to RF Measurements section for more information on the menus below.
Agilent PXT Wireless Communications Test Set User’s Guide Input Mode Int: When set to internal, the front-panel inputs are active. Ext: When set to external, the Input Source key is activated to enable selection from the rear panel inputs. Mode BSE, SA Range Int | Ext Preset Int Initial S/W Revision 6.0 Key Path Config > RF Setup > RF Input Control Input Source IF: When set to IF, the uplink rear panel inputs accept IF signals.
Agilent PXT Wireless Communications Test Set User’s Guide Ext Cell Select Refer to RF Measurements section for more information on the menus below. Key Path: Config > RF Setup RF DL Output Enables external processing of the IQ signals (for example: fading) before RF up-conversion takes place. There are four BNC outputs associated with this menu key: I1 OUTPUT, Q1 OUTPUT, I2 OUTPUT, and Q2 OUTPUT. The corresponding inputs are: I1 RETURN, Q1 RETURN, I2 RETURN, and Q2 RETURN.
Agilent PXT Wireless Communications Test Set User’s Guide Ext Cell Select You must select External, by pressing BSE > Config > RF Output Control > RF DL Output to enable the functionality of this key. A-Cell: Enables external processing (for example: fading) of internally generated IQ signals, as described in RF DL Output, above. B-Cell: Enables an external signal to be injected into B-Cell via the I/IF INPUT and Q/IF INPUT BNCs, where it is processed and pushed back out through the IQ OUTPUT BNCs.
Agilent PXT Wireless Communications Test Set User’s Guide IP Sets the PXT IP address. The IP address is persistent through a power cycle of the PXT. IP address of the PXT is needed to connect to the N6061A Protocol Logging and Analysis tool, the N6062A Protocol Message Editor tool, and the E6621A Remote API DLL. Key Path: Config > Network Setup > IP Setup Netmask This value is a 32-bit mask used to divide an IP address into subnets and specify the networks available hosts.
Agilent PXT Wireless Communications Test Set User’s Guide OK After designating all the necessary IP addresses above, press this key to activate these settings. Changes to the IP configuration will not take effect until the OK key is pressed. Key Path: Config > Network Setup > IP Setup Remote Ctrl Setup This key accesses the menus to configure remote control of the PXT using either .DLL or GPIB. The settings in this menu are all persistent through an instrument power cycle.
Agilent PXT Wireless Communications Test Set User’s Guide PXT Connections Displays the current value for PXT IP Address #1 and accesses the key menu that enables you to change this address and/or connect to the EPC. Initial S/W Revision 6.4 Key Path Config > Network Setup > EPC Setup PXT IP Address #1 With each key press, a different IP address segment (delineated by a period) is underlined.
Agilent PXT Wireless Communications Test Set User’s Guide B-Cell Ratio Selects the ratio in percent of the relative power allocated to B-cell compared to A-cell. For example, if Bcell is set to 100%, then A-cell is set to 0%. Mode BSE, SA Range 0 to 100 Units % Preset 0% Dependencies and/or Couplings This setting is coupled to A-Cell Ratio. Initial S/W Revision 6.0 Key Path Config > Cell Setup Cell Selection Accesses the available parameters you can set to configure the selection of the cell.
Agilent PXT Wireless Communications Test Set User’s Guide Mode BSE Initial S/W Revision 6.3 Key Path Mode > BSE > Config SIB8 Force Sync Pressing this key enables the following: 1. Resets the value of synchronousSystemTime inside the SIB8 message to the value specified in the scenario file. 2. Sends an external trigger signal at the beginning of the subframe to transmit this same SIB8 message containing the reset value.
Agilent PXT Wireless Communications Test Set User’s Guide Amplitude Offsets Accesses the amplitude offsets table and menu keys. Amplitude offsets compensate for loss or gain between the test set's RF IN/OUT front panel connector and the UE's RF connector. Amplitude offset settings are preserved during power cycles or instrument preset. There are two methods for entering offsets. They do not interact with each other. You must choose to use one or the other method.
Agilent PXT Wireless Communications Test Set User’s Guide Figure 2 – 1: Offsets Applicable to Band 4 Frequencies The table above is an example of how you would set the offsets applicable to Band 4 frequencies. It displays the points for the upper/lower boundaries of the uplink, and likewise for the downlink. This simplistic model provides a constant offset of -32dB on the received uplink path (32 dB of path loss), and -7 dB for the downlink.
Agilent PXT Wireless Communications Test Set User’s Guide Amplitude Offsets Between Frequency Points If mobile station testing is performed at frequencies that are not present in the table, the test set uses an offset based on a linear interpolation using the two frequency points adjacent to it. For example, Figure 2-2, below shows four amplitude offsets for frequencies ranging from 890 MHz to 920 MHz. Frequency (MHz) Offset (dB) 890 -1.00 900 -2.00 910 -3.00 920 -4.
Agilent PXT Wireless Communications Test Set User’s Guide RF In/Out Offset Selects the offset number (which is a point as shown on the graph in Figure XX, above) for which you wish to specify frequency, offset, and state values. The offset selected is highlighted on the display. See red column shown in Figure 2 – 1, above. Mode BSE, SA Range 1 to 60 Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Mode BSE, SA Range -100 dB to +100 dB Preset 0 dB State Saved Amplitude offset settings are preserved during power cycles or instrument preset. Initial S/W Revision 6.4 Key Path Mode > Config > Amplitude Offsets State Determines whether the offset selected is applied (On/Off) to the offset you have highlighted and/or used in the interpolation calculation when applicable. See pink column shown in Figure 2 – 1, above.
Agilent PXT Wireless Communications Test Set User’s Guide This setting is primarily used with testing MIMO configurations. Maximum RF2 Output power is -10dBm. Mode BSE, SA Range –100 dB to +100 dB Units dB Preset 0 Initial S/W Revision 6.0 Key Path Mode > BSE/SA > Config > Amplitude Offsets RF1 Input Power Offset Enables you to enter a value to adjust the measurement results. Enter a positive value to correct for a loss. For example: For 20dB of loss, enter +20dB. This loss is applied globally.
Agilent PXT Wireless Communications Test Set User’s Guide UL Timing Offset Adjustment Provides a manual offset adjustment for the uplink timing, to ensure the signal is captured by the PXT. For configurations involving fading, it is possible that the uplink signal may be delayed relative to the expected start position. This setting compensates for this delay. If you are using large delays in fading, this parameter is necessary in order to connect to the PXT.
Agilent PXT Wireless Communications Test Set User’s Guide Setting Method Enables you to select how you wish to set the Frequency. EARFCN: When you select this option, the PXT frequency is determined by the values set using the Band menu key and those values entered for the EARFCN parameters. Refer to DL EARFCN, UL EARFCN, and UL/DL EARFCN for further clarification. FREQ: Sets the PXT frequency based on the values set using the and Center (UL) Freq menu keys when Tech is set to FDD.
Agilent PXT Wireless Communications Test Set User’s Guide Initial S/W Revision 6.0 License Type E6621A-503 = 350 MHz to 3 GHz E6621A-506 = 350 MHz to 6 GHz Key Path Freq Center (UL/DL) Freq Sets the UL and DL center frequency to the same value. Mode BSE, SA, TDD Range 350 MHz to 3 GHz or 6 GHz (Depends upon license.) Units Hz, KHz, MHz, GHz Preset TDD: 1.910 GHz Dependencies and/or Couplings This key is grayed out when Tech is set to FDD. Frequency range depends on installed license.
Agilent PXT Wireless Communications Test Set User’s Guide DL EARFCN Sets the downlink EARFCN and uses the default separation for the selected frequency band as specified in the 3GPP test specification 36.101 section 5.7.4 to calculate the correct value of UL EARFCN. This setting automatically overwrites the UL EARFCN value and the Center(DL)Freq value.
Agilent PXT Wireless Communications Test Set User’s Guide UL EARFCN Sets the uplink EARFCN. The UL EARFCN can be set independently to the DL EARFCN (to enable different separations between DL and UL). Setting the UL EARFCN value has no effect on the DL EARFCN value. Setting the UL EARFCN (even if this is done automatically by setting a DL EARFCN) overwrites the Center(UL)Freq value.
Agilent PXT Wireless Communications Test Set User’s Guide UL/DL EARFCN Sets the uplink and downlink EARFCN to the same value.
Agilent PXT Wireless Communications Test Set User’s Guide Func - Key Menu 1 Accesses the menu enabling you to control the following: DTCH Test UE Power Control Handover UE Detach Paging Custom Messages PDCCH Order OCNG Key Path: Front-panel key DTCH Test Dedicated Traffic Channel Test (DTCH) enables you to access functions that activate the DTCH test, manually control the data transfer, and set parameters to define the data throughput.
Agilent PXT Wireless Communications Test Set User’s Guide Parameter (Key Menu 1) Enables you to access parameter settings to define the data throughput. Ipv4 Setting UDP Setting Transfer Mode Transfer Rate Format Payload Type Key Path: Mode > BSE > Func > DTCH Test Ipv4 Setting The Internet Protocol version 4 (IPv4) setting enables you to set the source and destination address for this IP network protocol. This enables you to send “ping” packets to the UE.
Agilent PXT Wireless Communications Test Set User’s Guide UDP Setting (User Datagram Protocol) The User Datagram Protocol (UDP) setting enables you to set the source and destination ports for this network protocol. To activate this function, you must select UDPv4 by pressing Func > DTCH Test > Parameter > Format until this option is underlined. Key Path: Mode > BSE > Func > DTCH Test > Parameter Source Port Sets the port number from which the datagram is sent.
Agilent PXT Wireless Communications Test Set User’s Guide Transfer Rate Maximum: Enables you to send the maximum number of packets in the DTCH test. (Approximately 50 packets per second (pps)) Manual: Use this setting if you want to test data by sending packets at a slower rate. Mode BSE Range Maximum | Manual Preset 1 pps Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Incremental For UDPv4 and ICMPv4, the hexadecimal content of the payload of the packets can be set to increment between transmissions. This is helpful in packet identification. Key Path: Mode > BSE > Func > DTCH Test > Parameter > Payload Type User Define For UDP and ICMPv4, this selection enables you to define the sixteen bits of hex data, which are repeated inside each packet payload sent to the UE.
Agilent PXT Wireless Communications Test Set User’s Guide Power Control Mode Sets the control of the UE power to manual or CLPC (Closed Loop Power Control). Refer to CLPC and Closed Loop Power Control – More information. Mode BSE Range Manual | CLPC Preset Manual UE must be connected. Power Adjust (All Up) or Power Adjust (All Down) must be Off in order to set this feature to CLPC. Selecting CLPC automatically sets Atten > Attenuation = Adaptive.
Agilent PXT Wireless Communications Test Set User’s Guide When option 0 is selected, pressing Send Message in the UE Power Control menu (the key above) transmits a single DCI 0 message with a modified TPC command value, as specified in the Power Adjust (Accumulated) setting (the key below). This adjusts the power of the PUSCH transmission by the specified amount.
Agilent PXT Wireless Communications Test Set User’s Guide Power Adjust (DCI3A) The value selected under this setting (−1 or 1) adjusts the UL Transmit power of the UE, when the DCI Format selected is 3A. Selecting DCI 3A is only possible if the scenario file contains a tpc-PDCCH-ConfigPUSCH information element, with a tpc-Index value set to transmit the appropriate type of DCI message. Like those DCI formats described above, a single DCI message is sent upon pressing the Send Message menu key.
Agilent PXT Wireless Communications Test Set User’s Guide 2. Select Func > UE Power Control = CLPC. (Selecting CLPC automatically sets Atten > Attenuation = Adaptive.) 3. Set the PUSCH Target Power to +23 dBm. Power control commands are sent to the UE, which changes its power level. The PXT tracks these power changes when Attenuation is set to Adaptive. 4. Note the PUCCH value. It is now set between +23 dBm and +3 dBm because PUSCH and PUCCH cannot be separated by more than 20 dB (PXT limitation).
Agilent PXT Wireless Communications Test Set User’s Guide PUSCH Power Adjustment PUCCH Power Adjustment 48
Agilent PXT Wireless Communications Test Set User’s Guide PUSCH Target Power Sets the target power in dBm for the physical uplink shared channel. This power level is modified by the use of DCI 0 commands. Mode BSE Range -45 to +23 Preset 0.00 dBm Dependencies and/or Couplings • • Initial S/W Revision 6.4 Mode > BSE > Func > UE Power Control > CLPC Key Path UE must be connected. PUSCH Target Power and PUCCH Target Power cannot be separated by more than 20 dB (PXT limitation).
Agilent PXT Wireless Communications Test Set User’s Guide Tolerance When using closed loop power control, the PXT continually tries to adjust the power that the UE is using to transmit the PUSCH and PUCCH until it reaches the target power +/- the value specified in this setting. Note that it may not always be possible to reach the selected target power. For example: if it is above the maximum power level that the UE can transmit.
Agilent PXT Wireless Communications Test Set User’s Guide Handover Accesses the Send and Message Name functions. Mode BSE. FDD Dependencies and/or Couplings You must have a scenario file that includes handover messages. Initial S/W Revision 6.1 Notes SCPI command returns number of HANDOVER messages available. Key Path Mode > BSE > Func Send Sends the specified Handover message from the list displayed when you press Func > Handover > Message Name. Mode BSE, FDD Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Handover Setup Mode Enables you to set parameters for performing a blind handover. When set to Blind, after sending the selected handover message, the PXT automatically adjusts the DL Frequency, UL Frequency, and Physical Cell Id to the values specified below. This makes it possible to perform a handover with only one cell present at a time (without option BB1). Mode BSE, FDD Range Default | Blind Preset Default Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide UE Detach Accesses the Send and Message Name functions. This is the “Release Message” box shown on the Extended tab of the N6062A Protocol Message Editor software tool. Mode BSE Dependencies and/or Couplings You must have a scenario file that includes UE Detach messages. Initial S/W Revision 6.1 Notes SCPI command returns the number of DETACH messages available.
Agilent PXT Wireless Communications Test Set User’s Guide The PXT saves this data for up to one second or until the UE reaches the RRC Connected state (CON). When the UE is connected, the data that has prompted the paging process (and all subsequent data that has arrived since) is sent to the UE. If the UE does not reach the CON state within one second, the queued data is discarded. Each IP packet that arrives during this one second period does not prompt a new paging message to be sent.
Agilent PXT Wireless Communications Test Set User’s Guide Figure 2-3: Extended Tab of N6062A Protocol Message Editor Software Key Path: Mode > BSE > Func Send Sends the specified Custom Message from the list displayed when you press Func > Custom Message > Message Name. Mode BSE Dependencies and/or Couplings You must have a scenario file that includes all handover settings. Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Notes SCPI command returns the name of the specified CUSTOM message Key Path Mode > BSE > Func > Custom Messages Measurement Report Measurement Reports only exist here if you have created them using the N6062A Protocol Message Editor software on the Extended tab. Refer to Measurement Report on page 76 for more information.
Agilent PXT Wireless Communications Test Set User’s Guide OCNG (Orthogonal Channel Noise Generation or OFDM Channel Noise Generation) This function implements OCNG with the following options, as defined in 3GPP TS 36.521-1, section A.5. The functions in this menu are primarily useful when performing Radio Conformance Testing. Key Path: Mode > BSE > Func OP.1/OP.2 Setting OCGN OP.1/OP.2 to On, implements OCNG as defined in 3GPP TS 36.521-1, section A.5.
Agilent PXT Wireless Communications Test Set User’s Guide RB In each test case, the OCNG is expressed by parameters OCNG_RA and OCNG_RB which together with a relative power level ( γ ) specifies the PDSCH EPRE-to-RS EPRE ratios in OFDM symbols with and without reference symbols, respectively. Refer to 3GPP TS 36.521-1, section A.5. Mode Range BSE 0 – 3 (Integer only) Preset 0 Initial S/W Revision 6.1 Available for TDD at 6.
Agilent PXT Wireless Communications Test Set User’s Guide PA PA is one of the parameters that controls the power boosting applied to the PDSCH. It is signaled in the RRC Connection Setup message. See 3GPP TS 36.213 section 5.2 for details of how the values of PA (and PB) determine how much boosting is applied to the PDSCH. Mode BSE Overwrites Scenario File Value Yes Initial S/W Revision 6.4 Available for TDD in 6.5.
Agilent PXT Wireless Communications Test Set User’s Guide RCT Accesses the following parameter menus: Statistical Throughput Pm-an Pm-dsg Statistical CQI Performance Key Path: Mode > BSE > Func > More Statistical Throughput The Statistical Throughput measurement enables testing of 36.521-1, section 7 test cases. (Section 7 test cases are all SISO.) The Statistical Testing of Receiver Characteristics, defined in 3GPP TS 36.521-1 Appendix G.2 describes this measurement.
Agilent PXT Wireless Communications Test Set User’s Guide Initial S/W Revision 6.4 Key Path Mode > BSE > Func > More > RCT > Statistical Throughput Test Start Starts the statistical throughput measurement. Mode BSE, FDD Initial S/W Revision 6.4 Key Path Mode > BSE > Func > More > RCT > Statistical Throughput Test Stop Stops the statistical throughput measurement. Mode BSE, FDD Dependencies/Couplings This key is greyed out unless test is running. Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Confidence Level Setting this menu key to On enables the PXT to determine the probability of whether the Pm-an measurement will pass or fail, based on the table in 3GPP TS 36.521-1 Appendix G.4.4-2. This may cause the Pm-an measurement to stop before the Max Frame Size has been reached. Setting this menu key to Off enables the Pm-an measurement to run for the number of transmissions set using the Max Frame Size menu key.
Agilent PXT Wireless Communications Test Set User’s Guide Mode BSE, FDD Range 1 to 1000000 Preset 12913 Initial S/W Revision 6.3 Key Path Mode > BSE > Func > More > RCT > PM-dsg Confidence Level Setting this menu key to On enables the PXT to determine the probability of whether the PM-dsg measurement will pass or fail, based on the table in 3GPP TS 36.521-1 Appendix G.4.4-1. This may cause the Pm-dsg measurement to stop before the Max Frame Size has been reached.
Agilent PXT Wireless Communications Test Set User’s Guide Preset 1000 Initial S/W Revision 6.3 Key Path Mode > BSE > Func > More > RCT > Statistical CQI Performance Test Start This menu key starts the Statistical CQI Performance measurement. Key Path: Mode > BSE > Func > More > RCT > Statistical CQI Performance Test Stop This menu key stops the Statistical CQI Performance measurement.
Agilent PXT Wireless Communications Test Set User’s Guide Median CQI Start This setting starts/initiates the collection of CQI reports from UE. • For aperiodic CQI reports this setting requires the PXT to start asking for aperiodic CQI reports implicitly. • For periodic CQI reports the UE will continue to send CQI reports periodically; this setting will start collect periodic CQI reports to generate the medium CQI statistics.
Agilent PXT Wireless Communications Test Set User’s Guide The message is not sent during a period of time when the UE is not listening to the DL (Connected Mode DRX or Measurement Gap). The TA command is still sent, but at the next available opportunity (for example: when the onDuration occurs). If the TA command is a periodic one (see Periodic Timing Advance Frequency) and several are sent when the UE is in DRX, only one will be sent when the next onDuration is available.
Agilent PXT Wireless Communications Test Set User’s Guide Func Setup (Functional Setup) Accesses trigger menu options. Refer to RF Measurements section for more information on the menus below. Key Path: Front-panel key Trigger Accesses Free Run and External Trigger menu options. Refer to RF Measurements section for more information on the menus below. Key Path: Mode > BSE > Func Setup Free Run Pressing this key, when it is not selected, selects free-run triggering.
Agilent PXT Wireless Communications Test Set User’s Guide Sweep Refer to RF Measurements section for information on this function. Key Path: Mode > BSE > Func Setup Help Displays the URL where the Agilent PXT Wireless Communications Test Set (E6621A) documentation is located.
Agilent PXT Wireless Communications Test Set User’s Guide Info (System Info) Displays important facts about your instrument. Accesses the menu enabling you to control the following: Update Application Update License System Temperature Key Path: Front-panel key Figure 2-4: Information Screen [Hardware Information] Displays serial number, hardware version and installed options of your instrument. [Module Information] Displays version of software components required to for instrument operation.
Agilent PXT Wireless Communications Test Set User’s Guide Update Application Press this menu key after inserting a USB memory stick (to which you have already copied the latest version of PXT firmware) into one of the USB ports of the PXT. Refer to the section entitled, “Upgrading Your Instrument Software” in the PXT Getting Started Guide for detailed instructions.
Agilent PXT Wireless Communications Test Set User’s Guide Interpreting Display Information The indicators described below are those currently used by the PXT. Shift: Shift in the input keypad. N6061A: Logger is currently connected OVF: Overflow. When this icon is lit up, it means the uplink power level is too high for the PXT to provide accurate measurements.
Agilent PXT Wireless Communications Test Set User’s Guide The displayed information above is described in the UE State section on page143. Message This tab displays UL RRC messages highlighted in pink and DL RRC messages highlighted in blue.
Agilent PXT Wireless Communications Test Set User’s Guide L1/L2 Status L1 Information – UL Information Display the MCS index and Number of Resource Blocks currently selected for use on the uplink. L1 Information – DL Information Displays the MCS Index, Number of Resource Blocks and the Type 0 Bitmap currently selected for use on the downlink. If MCS Based on CQI is set to On, the MCS Index changes frequently and is not reflected here.
Agilent PXT Wireless Communications Test Set User’s Guide Tx Power Displays the estimated power being transmitted by the UE and is based on the value of pMax and the Power Headroom Index sent by the UE. Key Path: Mode > BSE > Meas BLER/Throughput BLER(%) BLER: Displays the block error rate in percent versus time in seconds. The UL throughout measurements are currently FDD only.
Agilent PXT Wireless Communications Test Set User’s Guide TB1 and TB2 (ACK/NACK/StatDTX): TB1 and TB2 represent codewords 1 and 2 – there will be no feedback on a second codeword unless the DL transmission mode is either mode 3 or 4. ACK & NACK represent the number of transport blocks that have been positively or negatively acknowledged as having been received by the UE. A StatDTx is a transport block that the PXT expects the UE to ACK or NACK, but for which it receives neither.
Agilent PXT Wireless Communications Test Set User’s Guide Information Displays the information requested when the custom message, “Measurement Report” is included in the scenario file as well as basic BSE and UE data.
Agilent PXT Wireless Communications Test Set User’s Guide Field Description MeasId Represents the Measurement Identity as typically configured in an RRC Connection Reconfiguration message. RSRP Reference Signal Received Power – the value is an index. 3GPP 36.133, section 9.1.4 shows the mapping here between the displayed value and the measured quantity value in dBm. See More Information on RSRP below and under the Amplitude front-panel key description.
Agilent PXT Wireless Communications Test Set User’s Guide b. The setting of Amp > Output Power Offset. For example, when this is set to 10dB, the Amp > Amplitude setting is boosted by 10dB, which means the UE sees an RSTP value that is 10 dB higher and reports a 10 dB higher RSRP. See Amp > RF1 Output Power Offset on page 8 for more information. c. Any errors from the DL signal level. d. Any other measurement errors.
Agilent PXT Wireless Communications Test Set User’s Guide Channel State Information Aperiodic Wideband CQI Code 0: Dynamically displays the aperiodic Wideband CQI value reported by the UE for Code 0 Wideband CQI Code 1: Dynamically displays the aperiodic Wideband CQI value reported by the UE for Code 1 PMI: Dynamically displays the aperiodic PMI value reported by the UE RI: Dynamically displays the aperiodic PMI value being reported by the UE Periodic Wideband CQI Code 0: Dynamically displays the periodic
Agilent PXT Wireless Communications Test Set User’s Guide For example, in the picture above the channel bandwidth is 10 MHz and there are 9 PMI subband aperiodic reports from the UE. The median CQI for codeword 0 and 1 has been calculated for over 100 reports and has a Wideband Median CQI value equal to 9. All the reports of CQI for codeword 0 have a value of 9 so we can observe 100 reports under the “0” column of the matrix for the differential CQI report.
Agilent PXT Wireless Communications Test Set User’s Guide RLC Information RLC Information The Radio Link Control (RLC) information is described in the table below. Field Description Downlink – ‘A’ fields Equivalent to VT(A) in 3GPP 36.322 section 5.1.3.1.1 Downlink – ‘S’ fields Equivalent to VT(S) in 3GPP 36.322 section 5.1.3.1.1 Downlink – ‘POLL SN’ fields If Status Reporting active, equivalent to POLL_SN in 5.2.2.1 Uplink – ‘R’ fields Equivalent to VR(R) in 3GPP 36.322 section 5.1.3.2.
Agilent PXT Wireless Communications Test Set User’s Guide PDCP Information PDCP Information The Packet Data Control Plane (PDCP) information is described in the table below. Field Description Integrity Algorithm Displays the integrity algorithm currently running in the Non-Access Stratum Ciphering Algorithm Displays the ciphering algorithm currently running in the Non-Access Stratum Integrity (On/Off) Displays On if Integrity Protection is enabled in the Access Stratum and Off if it is disabled.
Agilent PXT Wireless Communications Test Set User’s Guide Meas Setup When in BSE mode, this key accesses the Phy Settings key menu. Refer to PHY Settings on page 88 for descriptions of these functions. When in SA mode, you can setup the measurements depending upon which selection you have made: Spectrum Analyzer, LTE, or VSA. Refer to RF Measurements section for more information on the menus below. Key Path: Front-panel key Average This menu key only applies when you are making RF Measurements.
Agilent PXT Wireless Communications Test Set User’s Guide Start Time Specifies the time you wish the measurement interval to start. Mode SA, LTE Preset 5000 us Initial S/W Revision 6.3 Key Path Mode > SA/LTE > Meas Setup > Edit Interval Duration Specifies the interval of time for which you wish to make the measurement. Mode SA, LTE Preset 1000 us Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Mode Setup (BSE Mode)-Key Menu 1 Accesses the available parameters you can set to configure the BSE mode. Call Scenario EPC Control Mode CH Bandwidth C-RNTI Key Path: Front-panel key Call Scenario Accesses the Change Directory/Load, Unload, and Delete options available for scenario files created using the N6062A Protocol Message Editor software.
Agilent PXT Wireless Communications Test Set User’s Guide You must set EPC to Embed to enable IP connectivity. Otherwise, all uplink IP data will be discarded. When using the E6621A alone, (not connected to an 8960), the UE IP addresses are taken from the scenario files or the settings made on the PXT user interface. In this case, you need to verify the BSE network settings by selecting Config, Network Setup, IP Setup. When using the E6621A connected to an 8960, see EPC Setup for more information.
Agilent PXT Wireless Communications Test Set User’s Guide This setting overwrites the value defined in the currently loaded scenario file, when the BSE emulator is not running (Mode > BSE > Emulator Mode- Stop is selected). Mode BSE Overwrites Scenario File Value Yes Range FDD: 1.4 MHz, 3.0 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz TDD: 5 MHz, 10 MHz, 20 MHz Preset 10 MHz Initial S/W Revision 6.0 (1.4 MHz, 3.0 MHz, and 15 MHz were added for FDD only at S/W Revision 6.4.
Agilent PXT Wireless Communications Test Set User’s Guide PHY Settings Accesses the physical layer parameters available to you for configuration. Cell ID PHICH Resource CFI CFI (Normal SF) CFI (Special SF) UL Resource Allocation DL Resource Allocation - Key Menu 1 DL Resource Allocation - Key Menu 2 Key Path: BSE > Mode Setup > More Cell ID cell Sets the Physical Layer Cell Identity as defined in 3GPP 36.211, referred to as N ID .
Agilent PXT Wireless Communications Test Set User’s Guide CFI The Control Format Indicator (CFI) sets the number of OFDM symbols used for the PDCCHs in a subframe. Transmission Bandwidth Configuration Number of PDCCH Symbols per Subframe > 10 RB (1.8 MHz) CFI value ≤ 10 RB CFI + 1 The CFI is mapped to the Physical Control Format Indicator Channel (PCFICH) in the physical layer. Mode BSE, FDD Range 1-3 Preset ACELL = 2 / BCELL = 2 Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide UL Resource Allocation Accesses the Uplink Resource Allocation parameters available for you to configure.
Agilent PXT Wireless Communications Test Set User’s Guide Mode BSE Range FDD: 0 to 23, 29 TDD: 0 to 23 Preset ACELL / BCELL = 12 Initial S/W Revision 6.1 Notes This key changed at S/W Revision 6.3. Key Path Mode > BSE > Mode Setup > More > PHY Settings > UL Resource Allocation RB Size Sets the number of contiguously allocated resource blocks used on the uplink. This parameter is referenced as LCRBs in 3GPP 36.213, section 8.1.
Agilent PXT Wireless Communications Test Set User’s Guide Ignore PRACHs Setting this parameter to On, enables the BSE to ignore UL PRACH preambles from the UE. Mode BSE, FDD Range On | Off Preset Acell / Bcell = Off Initial S/W Revision 6.1 Key Path Mode > BSE > Mode Setup > More > PHY Settings > UL Resource Allocation Aggregation Level Accesses the menu that enables you to set the PDCCH C-RNTI Aggregation Level for the UL.
Agilent PXT Wireless Communications Test Set User’s Guide In the uplink, the semi-persistent grant scheme is implicitly cancelled if no data is sent for a network configured number of empty uplink transmission opportunities (see 3GPP TS 36.321, chapter 5.10). For the PXT, LCID 10 must be used as the logical channel identifier for semipersistent scheduling. Mode BSE, FDD Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide RB Start Sets the starting resource block used for the uplink allocation where a semi-persistent scheduling allocation is being used. This parameter is referenced as RBSTART in 3GPP 36.213, section 8.1. Mode BSE, FDD Range 0 – 5 (1.4 MHz Bandwidth) 0 – 14 (3 MHz Bandwidth) 0 – 24 (5 MHz Bandwidth) 0 – 49 (10 MHz Bandwidth) 0 – 74 (15 MHz Bandwidth) 0 – 99 (20 MHz Bandwidth) Preset 0 Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Aperiodic CQI The settings in this menu control the starting and stopping of aperiodic CQI reports and the frequency for which they are generated. You must use a scenario file that has the CQI report configuration set appropriately to aperiodic for the UE to report them. Mode BSE Preset 01 Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Subframe #5 Control Subframe #0 Control Key Path: Mode > BSE > Mode Setup > More > PHY Settings Resource Allocation Mode Auto: This is a dynamic mode of operation where the values of RB Size, RB Start, and I_MCS are selected by the settings on the instrument. The decision to make a DL transmission is determined by the presence of data from higher protocol layers (for example: IP or RRC) that is pending transmission.
Agilent PXT Wireless Communications Test Set User’s Guide Use Report Type Enables you to select the UE CQI report type on which the selection of downlink MCS is based. This must be used in conjunction with MCS Based on CQI set to On and with an appropriately configured scenario file. Wideband: Use this setting to select the downlink MCS index based on wideband CQI reports. Subband: Use this setting to select the downlink MCS index based on subband CQI reports.
Agilent PXT Wireless Communications Test Set User’s Guide Mode BSE Initial S/W Revision 6.4 Key Path Mode > BSE > Mode Setup > More > PHY Settings > DL Resource Allocation I_MCS sf-control By default, the MCS index used on all downlink subframes is the same and is controlled by the I_MCS menu key on page 99. However, in certain circumstances, it may be preferable to use a different MCS index on subframe zero than that used on other subframes.
Agilent PXT Wireless Communications Test Set User’s Guide I_MCS(Subframe #1-9) If I_MCS sf-control is set to On, this value specifies the MCS Index that is used on the downlink in subframes one through nine. Mode BSE, FDD Range 1 to 9 Preset 5 Dependencies and/or Couplings I_M CS sf-control must be set to On to enable this function. Initial S/W Revision 6.0 (Moved to DL Resource Allocation menu in 6.
Agilent PXT Wireless Communications Test Set User’s Guide RB Size Sets the number of contiguously allocated localized virtual resource blocks used on the downlink. This parameter is referenced as LCRBs in 3GPP 36.213, section 7.1.6.3. The number of resource blocks allocated is constrained by the bandwidth of the cell. This parameter is only available when using transmission modes one and two (which use Resource Allocation Type 2). Mode BSE Range 1-6 (1.
Agilent PXT Wireless Communications Test Set User’s Guide Type0 Bitmap When using Resource Allocation Type 0 (see 3GPP 36.213, section 7.1.6.1), this bitmap indicates the resource block groups that are allocated to the UE. This field is only available when using TM3, TM4, TM6, and TM7 (which use Resource Allocation Type 0). Mode BSE Range 0x00000000 – 0x0000003F (1.
Agilent PXT Wireless Communications Test Set User’s Guide DL Resource Allocation - Key Menu 2 Accesses the 2nd Menu of available to configure Downlink Resource Allocation parameters. MIMO Setting Aggregation Level RCT Key Path: BSE > Mode Setup > More > PHY Settings Subframe #0 Control This controls the usage of subframe number zero regarding the transmission of UE Specific transmissions. Some Radio Conformance Tests state that subframe number zero must not be used.
Agilent PXT Wireless Communications Test Set User’s Guide Codebook Controls the Codebook Index in use. When using TM4 or TM6, there is a choice of which codebook entry to use for pre-coding (see 3GPP 36.211, section 6.3.4.2.3.) For TM4, a Codebook Index of either 1 or 2 can be used when using two layers and a Codebook Index of 0, 1, 2 or 3 can be used when using one layer. For TM6, there is only one layer – a Codebook Index of 0, 1, 2, or 3 can be used.
Agilent PXT Wireless Communications Test Set User’s Guide Specified: Enables the second transport block to use the MCS index specified in the I_MCS (Codeword 2) setting below. Mode BSE, FDD Range Default | Specified Preset Default Only applicable when using Transmission Mode 3 or 4 (MIMO). Dependencies and/or Couplings Initial S/W Revision Key Path 6.
Agilent PXT Wireless Communications Test Set User’s Guide Rank Selection For transmission modes 3 or 4, the method of selecting the number of codewords used in a subframe can be determined using this setting. Auto: Sets the number of codewords used to be determined by Rank Indicator reports received from the UE in periodic reports. Note that the scenario used must enable this behavior. Manual: Sets the number of codewords used to be determined by the ‘Number of Codewords’ setting.
Agilent PXT Wireless Communications Test Set User’s Guide SI/RA/P-RNTI Enables you to set the aggregation level or number of Control Channel Elements (CCEs) occupied by the following DCI broadcast message types: SI: System Information RA: Random Access Response P-RNTI: Paging Radio Network Temporary Identity Select the aggregation level by referencing the tables above as they are dependent upon the channel bandwidth for the DL Resource Allocation.
Agilent PXT Wireless Communications Test Set User’s Guide DL TX Pattern This enables configuration of the downlink to transmit UE specific data on all subframes (normal operation) or to transmit UE specific data only on downlink subframes one and six. This function is primarily used for Radio Conformance Testing. Mode BSE, FDD Range ALL | SF1/6 Preset ALL Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide SPS Config (Semi-persistent Scheduling Configuration) Accesses the menu key to configure semi-persistent scheduling in the downlink. Because voice calls (VoLTE) send short bursts of data at regular intervals, compared to bursty, infrequent and bandwidth consuming data transmissions of web surfing, video streaming, and emails, it is more efficient to define a transmission pattern which is known as semi-persistent scheduling.
Agilent PXT Wireless Communications Test Set User’s Guide RB Size Sets the number of contiguously allocated localized virtual resource blocks used on the downlink where a semi-persistent scheduling allocation is being used. This parameter is referenced as LCRBs in 3GPP 36.213, section 7.1.6.3. The number of resource blocks allocated is constrained by the bandwidth of the cell. This parameter is only available when using transmission modes one and two (which use Resource Allocation Type 2).
Agilent PXT Wireless Communications Test Set User’s Guide MAC Settings Accesses the menu of settings available to configure the Medium Access Control (MAC). DL HARQ Max Trans UL HARQ Max Trans Key Path: BSE > Mode Setup> More DL HARQ Max Trans Downlink Hybrid Automatic Repeat Request (HARQ) maximum transmission controls the number of times the PXT attempts to transmit a downlink transport block before it is discarded.
Agilent PXT Wireless Communications Test Set User’s Guide Preset 1 Initial S/W Revision 6.3 TM7 for TDD was added in software release 6.5. Key Path BSE > Mode Setup> More > RRC Settings Transmission Mode Controls the transmission mode assigned in the RRC Connection Setup message. If set to TM3 or TM4, this menu key also enables the codebook subset restriction field.
Agilent PXT Wireless Communications Test Set User’s Guide p-Max The p-Max value is carried in SIB1 and determines the maximum power that the UE is allowed to transmit. This setting overwrites the value defined in the currently loaded scenario file, when the BSE emulator is not running (Mode > BSE > Emulator Mode = Stop is selected). Mode BSE Overwrites Scenario File Value Yes Range −30 to 33 Preset 23 Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Default Paging Cycle Controls how frequently UE can be paged. This setting is contained in SIB2. This setting overwrites the value defined in the currently loaded scenario file, when the BSE emulator is not running (Mode > BSE > Emulator Mode = Stop is selected). Mode BSE Overwrites Scenario File Value Yes Range Rf32 | Rf64 | Rf128 | Rf256 Preset Rf32 Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Connected DRX On/Off Controls the drx-Config element of the RRC Connection Reconfiguration message to be set to setup or release. This enables or disables Connected Mode DRX in the UE. This setting overwrites the value defined in the currently loaded scenario file, when the BSE emulator is not running (Mode > BSE > Emulator Mode = Stop is selected).
Agilent PXT Wireless Communications Test Set User’s Guide onDurationTimer Enables you change the setting of the on duration timer that is present in the RRC Connection Reconfiguration message of the currently loaded scenario file. Mode BSE Overwrites Scenario File Value Yes Range psf1 | psf2 | psf3 | psf4 | psf5 | psf6 | psf8 | psf10 | psf20 | psf30 | psf40 | psf50 | psf60 | psf80 | psf100 | psf200 Preset psf6 Dependencies and/or Couplings Connected DRx On/Off must be set to On.
Agilent PXT Wireless Communications Test Set User’s Guide Short DRX Cycle Connected Mode DRX related – present in RRC Connection Reconfiguration. Controls whether shortDRX IE present or not. Mode BSE Overwrites Scenario File Value Yes Range On|Off Preset Off Dependencies and/or Couplings Connected DRx On/Off must be set to On. Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Dependencies and/or Couplings Short DRX Cycle On/Off must be set to On. Initial S/W Revision 6.3 Key Path BSE > Mode Setup> More > RRC Settings > More Timers Connection Timer Status Turns on or off the Connection Timer. Mode BSE Range On|Off Preset Off Initial S/W Revision 6.3 Available for TDD in 6.5.
Agilent PXT Wireless Communications Test Set User’s Guide Initial S/W Revision 6.4 Available for TDD in 6.5. Key Path BSE > Mode Setup> More > RRC Settings > Timers Inactivity Timer If the Inactivity Timer is turned On, this setting sets the number of seconds the UE remains in the RRC Connected state while not transferring any data on an SRB or DRB before the PXT sends an RRC Connection Release to it. Mode BSE Range 1 to 100 Preset 10 Initial S/W Revision 6.4 Available for TDD in 6.5.
Agilent PXT Wireless Communications Test Set User’s Guide Special Subframe Configuration This parameter controls the configuration of the special subframe. It determines how many symbols of the subframe are used for downlink transmission and how many are used for the uplink transmission. In the scenario file, it appears in SIB1, with the name specialSubframePatterns.
Agilent PXT Wireless Communications Test Set User’s Guide AS Ciphering Algorithm This controls the ciphering algorithm that is used in the RRC Security Mode Command that is sent to the UE. Note that although EEA0 can be used with any integrity algorithm, if EEA1 is selected, EIA1 must be configured in the RRC Security Mode Command in the scenario file for use as the integrity algorithm. Similarly, if EEA2 is selected, EIA2 must be configured in the RRC Security Mode Command in the scenario file.
Agilent PXT Wireless Communications Test Set User’s Guide In manual mode, the PTI value contained in a particular ESM message is as specified in the loaded scenario file. Manual mode may be useful in the following situations: • A UE is performing erroneously. For example: The UE initiates a procedure with one PTI value, but incorrectly expects a corresponding response to contain a different or default/uninitialized value. • Testing a UEs handling of receiving a mismatched PTI value.
Agilent PXT Wireless Communications Test Set User’s Guide MNC This value is carried in SIB1 and in the Attach Accept message. Setting this menu key overwrites this value in both messages. This setting overwrites the value defined in the currently loaded scenario file, when the BSE emulator is not running (Mode > BSE > Emulator Mode- Stop is selected). Mode BSE Overwrites Scenario File Value Yes Preset 01 Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Default EPS Bearer Config #1 - Key Menu 1 This enables the EPS Bearer ID associated with each of the configured Default EPS Bearer Contexts in the scenario file to be read back. Default EPS Bearer Config #1 is always the one contained inside the Attach Accept message, which contains an Activate Default EPS Bearer Context Request.
Agilent PXT Wireless Communications Test Set User’s Guide V4 Address Controls the IPv4 address that is assigned to the UE in the Activate Default EPS Bearer Context Request message, if you have selected this option, using the IP Address Type menu key selection above. Mode BSE, FDD Overwrites Scenario File Value Yes Range V4 IP address range Preset 000.000.000.
Agilent PXT Wireless Communications Test Set User’s Guide DNS Address Type Controls what type of IP address (IPv4, IPv6 or IPv4v6) is assigned as a DNS address in the Activate Default EPS Bearer Context Request message. Mode BSE, FDD Overwrites Scenario File Value Yes Range IPv4, IPv6, IPv4v6 Preset IPv4 Dependencies and/or Couplings You must have a scenario file loaded (but not running) that defines the particular EPS Bearer ID value for which you wish to configure. Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide APN (Access Point Name) The value in this field controls the APN that is present in the Activate Default EPS Bearer Context Request. Depending on the value of the APN Overwrite menu key, it also overwrites the Access Point Name in the scenario file. Refer to chapter 7, section, “Communication Scenario” in the N6062A Message Editor User’s Guide for more information on APN.
Agilent PXT Wireless Communications Test Set User’s Guide P-CSCF Address Type Sets the type of IP address you wish to use for the P-CSCF server if you have set P-CSCF State to On. Mode BSE Overwrites Scenario File Value Yes Range IPv4 | IPv6 | IPv4v6 Preset IPv4 Dependencies and/or Couplings • • You must have a scenario file loaded (but not running) that defines the particular EPS Bearer ID value for which you wish to configure. P-CSCF must be set to On. Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Cause Code State Controls whether the Activate Default EPS Bearer Context Request message contains a Cause Code (which usually indicates a requested service is not available). Mode BSE, FDD Overwrites Scenario File Value Yes Range On | Off Preset Off Dependencies and/or Couplings You must have a scenario file loaded (but not running) that defines the particular EPS Bearer ID value for which you wish to configure. Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Default EPS Bearer Config #3 Accesses the same configuration menu keys described for Default EPS Bearer Config #1 - Key Menu except this menu enables configuration of a third Default EPS Bearer. The EPS Bearer Identity of the context is dependent on the content of the third Activate Default EPS Bearer Context Request message present in the currently loaded scenario file.
Agilent PXT Wireless Communications Test Set User’s Guide Attach Type Handling In the Attach Request message, the UE can specify that it is attaching for ‘EPS only’ or that it is performing a ‘combined EPS/IMSI Attach’. In the EPS Attach Result (a parameter contained in the Attach Accept message that would be sent back to the UE) the UE would expect to see that it has been given the Attach Result that it requested. If Auto is selected, this takes place automatically.
Agilent PXT Wireless Communications Test Set User’s Guide Security On: Ensures the following security-related procedures are taken care of automatically by the PXT: • The AUTN parameter inside the DL EMM Authentication Request message contained in the scenario file is overwritten with a value that is valid for the currently selected Authentication Algorithm and derived from applicable settings in the Security Menu, including the K Value.
Agilent PXT Wireless Communications Test Set User’s Guide K value This is the 32 Hex digit representing the 128-bit subscriber key (K). Selecting Agilent SIM selects the K value which matches the Agilent USIM's "Applicative Key" as described at www.agilent.com/find/usim. If you choose 3GPP Test SIM, it matches the value defined in 3GPP TS 34.108. If you select the User Defined, then you must enter the 32 Hex Digit.
Agilent PXT Wireless Communications Test Set User’s Guide OP value You manually type in value here. Mode BSE Range 16 Byte Hex in string format Units Hex Preset None State Saved Yes Dependencies and/or Couplings Mode Setup > More > Security > Authentication Algorithm must be set to MILENAGE. Mode Setup > More > Security > Key Option must be set to OP. Initial S/W Revision 6.0 Value is saved through a Preset ≥ 6.5.
Agilent PXT Wireless Communications Test Set User’s Guide IMSI value International Mobile Subscriber Identity (IMSI) Type in the value that matches the SIM you are using. (primarily used during paging.) Mode BSE Range Agilent|3GPP|User Defined Preset Agilent State Saved No, except when “User Defined” is selected. Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Security – Key Menu 2 Replay When selecting On, the PXT automatically populates the Information Element (within the SECURITY_MODE_COMMAND) called, “Replayed UE Security Capabilities” with the exact capability content received by the UE within the previously received ATTACH_REQUEST UL EPS Mobility Management (EMM) Message.
Agilent PXT Wireless Communications Test Set User’s Guide SA Signal Analyzer (SA) mode enables two sub-modes: Spectrum Analyzer and LTE. Refer to the RF Measurements chapter on page 175. Key Path: Front-panel key Spectrum Analyzer Refer to the RF Measurements chapter on page 175. Key Path: Front-panel key LTE Refer to the RF Measurements chapter on page 175.
Agilent PXT Wireless Communications Test Set User’s Guide Start: Starts the recording. Stop: Stops or aborts the recording. It is recommended that you start the recording and allow the PXT to automatically stop the recording, based on the recording length you specified using the Agilent VSA > Record VSA > Length setting. Length: Sets the duration in msec. Saving recordings of captured data takes approximately 1 second per ms of recorded file.
Agilent PXT Wireless Communications Test Set User’s Guide Disconnect: Disconnects the VSA software. Mode SA Initial S/W Revision 6.4 Key Path Mode > SA > Agilent VSA > Real Time VSA VSA IP address: Insert the IP address of the PC hosting the Agilent VSA software. This must match the IP address of the PC running the VSA application. Mode SA Range 0.0.0.0 to 255.255.255.255 (must be the VSA PC valid IPv4 address) Initial S/W Revision 6.
Agilent PXT Wireless Communications Test Set User’s Guide Save Enables you to save states and screen captures in your specific filenamed locations. Key Path: Front-panel key Save State Enables you to save state files in the register locations (1-7) by selecting the file displayed on the screen using the up/down arrow keys and then pressing the Save menu key. You can rename the highlighted register location to one you prefer.
Agilent PXT Wireless Communications Test Set User’s Guide Tool Function is not currently available. Key Path: Front-panel key Tech If you have the appropriate licenses, this key enables you to switch modes between FDD and TDD. Switching modes takes a few minutes and the application then restarts using the chosen format.
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Agilent PXT Wireless Communications Test Set User’s Guide 3 Using the Base Station Emulator Mode (BSE) In the Base Station Emulator (eNodeB emulation) mode, the PXT simulates an LTE eNodeB's operation for use in the development and test of LTE UEs. In this mode, you test the UE by setting up a call and establishing a link. When the link is established the uplink and downlink tests described below can be performed.
Agilent PXT Wireless Communications Test Set User’s Guide Indicators The indicators shown below are those currently used by the PXT. Refer to Interpreting Display Information on page 71 for Indicator descriptions. Scenario Information A-Cell Scenario File Name: Displays the scenario file selected for cell A. B-Cell Scenario File Name: Displays the scenario file selected for cell B. CH Bandwidth: The frequency range in which the base station is sending and receiving data.
Agilent PXT Wireless Communications Test Set User’s Guide Emulator Run/Stop The eNodeB Simulation starts and stops by pressing this button. If simulation has started, the instrument is ready to be connected with the UE. When simulation stops, the instrument transmits only default signals in the downlink and all the tests are frozen. EPC Setup Configuration of the EPC is not required unless you are connecting to an 8960 or another PXT.
Agilent PXT Wireless Communications Test Set User’s Guide the connection from the appropriate page on the 8960. Before continuing, be sure that the 8960 reports the EPC Connection Status as “Connected”. Gateway Setting: This is where all UE uplink IP data is directed during inter-RAT testing, regardless to which subnet the IP data is destined. So, when setting up the IRAT handover procedure, this IP address is the target for 8960 UE IP traffic, and typically this is set to the “Server” PC IP address.
Agilent PXT Wireless Communications Test Set User’s Guide Setup and Operation General Call Setup Procedure 1. Press Emulator Mode > BSE > Mode Setup > Call Scenario to select the call scenario you wish to use. All instrument parameters must match the selected scenario file in order to successfully connect to the UE. Figure 3-3: Example Call Scenario List 2. Adjust Cell ID, PHICH Resource, CFI to align with the call scenario selected by pressing Mode > BSE > Mode Setup > More > PHY Settings.
Agilent PXT Wireless Communications Test Set User’s Guide Figure 3-4: General Call Setup Procedure Complete Functional Tests and E2E Test The following tests can be performed after call procedure is completed. Before performing various tests, settings for uplink and downlink resource allocation must be set. There are 2 uplink allocation modes, Auto and Fixed MAC Padding.
Agilent PXT Wireless Communications Test Set User’s Guide • OCNG • Downlink Power Control • RCT • CQI Median Refer to Func menu key on page 39 for more information. DTCH Test For the downlink data transmission test, select Func, DTCH Test. The packet to be transmitted is configured by selecting the Parameter menu. Data format, network interface, transfer rate, payload type, packet size, and numbers of packets to be transmitted are all set in this menu.
Agilent PXT Wireless Communications Test Set User’s Guide E2E Setup and Benchmarking Guide Typical E2E Test Setup Overview: Figure 3 -5: E2E Test Setup Component IP Subnet Mask Default Gateway Server PC 192.168.1.230 255.255.255.0 192.168.1.60 PXT 192.168.1.60 255.255.255.0 192.168.1.230 Client PC 192.168.1.51 255.255.255.0 1. The UE IP address is assigned upon connection by the PXT via the scenario file. This can be modified on the PXT user-interface if required. 2.
Agilent PXT Wireless Communications Test Set User’s Guide Example PXT Configuration for Maximum E2E Throughput Testing 1. Pre-set PXT 2. Load Default Scenario file “FDD_Combined_v6.3” or custom scenario file. 3. Set the following parameters: a. CH Bandwidth = 20MHz b. EPC = Embed c. RRC No. of Antennas = 2 d. RRC Transmission Mode = TM3 or TM4 e. Attenuation = Adaptive f. Frequency Band = 4. Set PHY UL Resource Allocation Mode = Fixed MAC Padding or Auto.
Agilent PXT Wireless Communications Test Set User’s Guide TDD - Typical DL Maximum Cat3 Performance Setup and Expected Bit Rates DL Resource Blocks DL I_MCS UL-DL Configuration Expected DL Mbps (TDD) 68 (68-69) 28 5 89.292 Mbps 80 (79-81) 27 5 89.292 Mbps 84 (82-84) 26 5 89.292 Mbps 88 (87-90) 25 5 89.292 Mbps 94 (93-96) 24 5 89.292 Mbps 100 (0x01FFFFFF bitmap) 23 5 89.292 Mbps 68 (68-69) 28 2 76.536 Mbps 80 (79-81) 27 2 76.536 Mbps 84 (82-84) 26 2 76.
Agilent PXT Wireless Communications Test Set User’s Guide Typical UL Maximum Performance Setup and Expected Bit Rate (TDD) Channel Bandwidth = 20MHz (TDD) UL Resource Blocks UL I_MCS UL-DL Configuration Expected UL Mbps (TDD) 100 22 1 18.72 Mbps 100 22 2 9.36 Mbps 100 22 5 4.68 Mbps 100 22 6 23.444 Mbps The PXT is now configured for maximum bi-directional bitrates. Next we’ll look at driving the E2E data through the PXT E2E link to achieve maximum bitrates.
Agilent PXT Wireless Communications Test Set User’s Guide Downlink PXT server (192.168.1.230) > iperf –s –i1 –p5052 –w20m UE Host Client PC (192.168.1.51) > iperf –c 192.168.1.230 –i1 –w20m –t300 –p5052 Parameter Descriptions -p Specifies the port ID to use. Ideal when firewalls are in use on specific sides and allows control over the port ID. -P Specifies the number of concurrent parallel TCP threads/streams.
Agilent PXT Wireless Communications Test Set User’s Guide Iperf can be used to test bi-directional streams simultaneously with a single command instance using the –d command. The above examples show individual bi-directional streams that: • control each UL and DL independently per direction • control starting and stopping in either direction • control the bitrate per direction. For additional Iperf help, see the application’s built-in help by typing “Iperf --help”.
Agilent PXT Wireless Communications Test Set User’s Guide 4 Using the Agilent 89600 VSA Software with the PXT The Agilent PXT/VSA Communicator is an application to enable the communication between the PXT and the PC running the Agilent 89600 VSA software. The Agilent 89600 VSA (VSA) is a PC based flexible measurement tool used to make measurements on IQ waveforms. PXT/VSA communicator enables you to use the PXT as hardware to capture uplink signals.
Agilent PXT Wireless Communications Test Set User’s Guide During installation the appropriate shortcuts are created under All Programs, Agilent PXT, Agilent PxtVsa Communicator as well as on the PC desktop to launch the application. In addition, there is an on-line help file accessible from the Help tab (F1) of the PXT/VSA software user interface at any time. Controlling PXT in Live Mode After you have installed the PXT-Communicator software, start the application from the desktop short-cut provided.
Agilent PXT Wireless Communications Test Set User’s Guide 4. If you want to measure the UE PUSCH signal, then you need to ask the UE to transmit PUSCH. This is done by setting the UL Resource Allocation Mode to Fixed Mac Padding: BSE > MODE Setup > More > PHY Settings > Uplink Resource Allocation > Resource Allocation Mode 5. Ensure the OVF indicator is not on. If it is on, set the attenuation, appropriately. At this point, you can either perform “Real Time VSA” live measurements or “Record VSA”.
Agilent PXT Wireless Communications Test Set User’s Guide Figure 4 – 2: PXT-VSA Server Status Now you are able to change any parameter of the VSA interface that you wish in order to analyze the data as needed.
Agilent PXT Wireless Communications Test Set User’s Guide For example: you may wish to measure a different slot or multiple slots. Below is an example of uplink PUSCH data from the PXT analyzed to measure 20 slots: Figure 4 – 3: UL PUSCH Data Measuring 20 Slots You can change any parameter on the PXT to obtain the data you wish to analyze on the VSA. Just remember to use the VSA as you would normally, to properly view and analyze the data.
Agilent PXT Wireless Communications Test Set User’s Guide Below is an example of PUCCH measurement with VSA: Figure 4 – 4: VSA Analysis of PUCCH Data Controlling PXT in Record Mode In this mode the PXT is able to capture between 12 ms and 200 ms of IQ data. It then writes this data to a file which enables the VSA to replay the recording and make post-processing measurements. On the PXT/VSA Communicator user interface, perform the same steps: 1-7, as stated above in live mode.
Agilent PXT Wireless Communications Test Set User’s Guide The file size is approximately 1 MB per msec, so if you save a 200 ms size file, it will be approximately 200 MB. The time to save and transfer the file could seem relatively long, approximately 1 second per ms of recorded file. It may appear that the PXT firmware or the PXT/VSA Communicator software has frozen, but just wait and it will eventually clear. For example the capture file below “PXT_CapturedData.txt” is copied from the PXT to VSA PC host.
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Agilent PXT Wireless Communications Test Set User’s Guide 5 Handovers There are many types of handovers (HO) that can be tested using the Agilent E6621A PXT. When discussing handovers, it is helpful to understand some of the terms used. Table 5-1 below describes these terms, while Table 5-2: LTE to LTE Handovers and Table 5-3: I-RAT Handovers provide a brief description of each handover type and the component requirements needed to perform them.
Agilent PXT Wireless Communications Test Set User’s Guide Table 5-2: LTE to LTE Handovers (Continued) Handover Description Intra-frequency Reselection - Example: Testing Two Cells Using One PXT Inter-frequency Reselection Requirements 1 PXT + Option BB1* or - UE chooses to move from Cell (ID=X) to a new Cell (ID=Y) due to a monitored threshold no longer being met within the current Cell connection, or UE has lost sync with current Cell. EARFCN stays the same.
Agilent PXT Wireless Communications Test Set User’s Guide Testing Two Cells Using One PXT The E6621A supports the ability to emulate two LTE cells at the same time when you have option BB1 installed. These are referred to as Cell A and Cell B within the instrument. Cell A and Cell B are completely independent full cells. Although Cell B is the receiver of the handover in the test described below, its functionality is equal to that of Cell A and is capable of performing the handover back to Cell A.
Agilent PXT Wireless Communications Test Set User’s Guide To load a scenario on Cell B: • Select the B-Cell after pressing BSE > Config > Cell Setup > Cell Selection. • Press Mode Setup > Call Scenario. Select a scenario file and load it into the setup. Note that the “B-Cell Scenario File Name” window, now displays the scenario loaded, as shown below. Figure 5 - 2: B-Cell Scenario File Loaded General Parameters Most PHY Parameters are independent between Cell A and Cell B.
Agilent PXT Wireless Communications Test Set User’s Guide Figure 5 - 4: Changing the Cell Power Ratio Display / Logging When running the PXT with two cells, the “Message” tab displays a prefix to the relevant lines in the log, denoting them as messages for A-cell (A) or B-cell (B). Figure 5 - 5: Cell and Cell B Messages The N6061A logging application shows the Physical Cell ID in the “Cell ID” column.
Agilent PXT Wireless Communications Test Set User’s Guide Example Use Case – Cell Reselection from Cell A to Cell B and Back to Cell A The following is a typical test showing UE reselection between the two cells. 1. 2. 3. 4. On Cell A, load a scenario which handles an Attach procedure. • Select cell A by pressing BSE > Config > Cell Setup > Cell Selection = A-Cell • Load the scenario file by pressing Mode Setup > Call Scenario > Load.
Agilent PXT Wireless Communications Test Set User’s Guide Blind Handover The Blind Handover is a PXT initiated redirection to a new EARFCN and/or Cell ID. You must have an rrcReconfiguration handover message within the scenario file and assigned to the BSE > Func > Handover key menu. The Blind Handover feature enables you to send the rrcReconfigurarion message in its original form, or overwrite EARFCN and/or Cell ID content using the front-panel menu keys or the remote command interface.
Agilent PXT Wireless Communications Test Set User’s Guide This example shows two blind handovers. The first is a successful handover; the second shows a handover failure. Note that in this example the failure causes the UE to perform an rrcConnectionReestablishment to successfully reconnect to the PXT.
Agilent PXT Wireless Communications Test Set User’s Guide Message Editor Requirements for Blind Handover For the Blind HO, there must be an rrcConnectionReconfiguration message which contains the setup information for the new cell. The only other addition is the mobilityControlInfo which lists the Cell ID and DL/UL EARFCNs.
Agilent PXT Wireless Communications Test Set User’s Guide To assist some UE’s to handover correctly, it may be necessary to include SIB4 (intra-frequency) and/or SIB5 (inter-frequency) content. SIB4 and/or SIB5 must be scheduled in the scenario start section, and the scheduling timing set in SIB1.
Agilent PXT Wireless Communications Test Set User’s Guide PXT to PXT Handover Two PXTs can be used together to emulate two LTE base stations. This enables you to test the ability for multi-band wireless devices to perform LTE handovers within the same frequency (intra-frequency) or between two different frequencies (inter-frequency/inter-band). The PXTs are designated as master (the PXT – cell A where the UE is initially connected) and slave (the original target PXT- cell B).
Agilent PXT Wireless Communications Test Set User’s Guide 3. 4. The EPC of the two PXTs needs to be “connected”. Therefore, you need to connect the Slave EPC to the Master EPC. In the Slave PXT, enter the EPC address of the Master and connect. a. On Slave PXT, select Config > Network Settings > EPC Setup > PXT Connections > MASTER PXT IP Address #1 (192.168.1.60 in this example) b. You don’t need to change anything on the Master PXT EPC.
Agilent PXT Wireless Communications Test Set User’s Guide 12. Send the HO message “RRC_Handover” by selecting Func > Handover > Message Name (Select message) > Send. 13. On the Master PXT originating the handover, you now see the RRCConnectionReconfiguration message. The destination (Slave PXT) displays the RRCConnectionReconfigurationComplete message. At this point the handover has completed successfully and the UE is connected to the Slave PXT. 14.
Agilent PXT Wireless Communications Test Set User’s Guide For more information on handovers, refer to the application note, Testing Handovers Between LTE and 3G cdma2000/1xEV-DOCellular Networks located here: http://cp.literature.agilent.com/litweb/pdf/5990-8362EN.pdf. Connecting the Hardware Components The figure below shows a typical physical connection for interworking between legacy 3GPP networks and LTE.
Agilent PXT Wireless Communications Test Set User’s Guide Table 5-4: Hardware and Functional Requirements (Continued) Component Function GPIB Connection The GPIB connection between both test sets and a controlling PC are necessary if remote control of the instruments in the system is required.
Agilent PXT Wireless Communications Test Set User’s Guide Specifically, to successfully perform a reselection to LTE when the UE is PDP (Packet Data Protocol) Active on the legacy network, the TrackingAreaUpdateAccept message must have the EPSBearerContextStatus information element present. This requires the following: • The EBID matching the active NSAPI (Network Service Access Point Identifier) on UTRAN/GERAN is marked as “true”.
Agilent PXT Wireless Communications Test Set User’s Guide The PS handover can then be initiated via the 8960 UI when the UE is PDP active. Only when performing the TAU procedure will IP connectivity be preserved during the PS handover. PS Handovers from LTE to UTRAN/GERAN PS Handovers require the target cell to setup dedicated resources for an incoming UE.
Agilent PXT Wireless Communications Test Set User’s Guide Performing Circuit Switched Fallback Mobile Originated CSFB Prior to performing the CSFB, the 8960 must be set up to respond to Unexpected Page Response (refer to WCDMA Unexpected Page Response or GERAN Unexpected Page Response). The voice parameters (if required) must also be set (refer to WCDMA AMR Setup or GERAN Channel Mode Setup).
Agilent PXT Wireless Communications Test Set User’s Guide SRVCC (Single Radio Voice Control Continuity) SRVCC enables a VoIP/IMS call in the LTE packet domain to be moved to a legacy voice domain (GSM/UMTS or CDMA 1x). For an operator with a legacy cellular network who wishes to deploy IMS/VoIP-based voice services in conjunction with the rollout of an LTE network, SRVCC offers VoIP subscribers with coverage over a much larger area than is typically available during the rollout of a new network.
Agilent PXT Wireless Communications Test Set User’s Guide Hardware Configuration Figure 5 - 12: SRVCC Hardware Configuration Initial Software Setup 1. Ensure PXT IP addresses are correctly set. Press Config > Network Setup > IP Setup > IP. 2. Verify that the gateway address on the EPC application is correct. See EPC Setup on page 144 for instructions on changing the gateway address. 3. Creating a compatible scenario file for the UE or use the front-panel user interface. 4. 5. a.
Agilent PXT Wireless Communications Test Set User’s Guide 11. Set the client voice codec to AMR or AMR-WB by selecting Configuration (tab) > Audio Codec Config. , 12. Inside the Audio Codec Configuration window, configure the following: a. b. c. 13. Select either AMR or AMR-wb to match that of the 8960. Deselect all other available codecs. On the AMR or AMR-wb tab include the Octet Alignment and set the value to 1. See figure below. Include the Mode Set and configure it to match that of the 8960.
Agilent PXT Wireless Communications Test Set User’s Guide PXT Scenario File The following highlight common message information elements that many devices require to support IMSSIP and the SRVCC handover. When creating or editing scenario files, it is helpful to remember that you must rightclick on the message editor parameter you wish to change and select the highlighted option (for example: Type Choice or Value Change), which then displays a drop-down list from which you can select the value you need.
Agilent PXT Wireless Communications Test Set User’s Guide For IMS-SIP operation the NAS messages ‘Attach Accept’ and ‘Tracking Area Update Accept’ must contain the optional information element EPSnetworkfeaturesupport. The value of ‘IMSVoPS’ must be set to 1 to indicate “IMS voice over PS session in S1 mode supported”. IPv6 is supported by all the Agilent equipment required to make this test. However, handovers between the PXT and 8960 for UE selected randomized IPv6 addresses is not currently supported.
Agilent PXT Wireless Communications Test Set User’s Guide 6. 7. 8. Figure 5 – 13: EPS Bearer ID Matches IMS-SIP Call Specifications Setup the 8960 for an inbound SRVCC handover: • Call Setup hardkey, F5 – Handovers, Left-hand side More to page 2, SRVCC Handover, Setup Inbound • The 8960 call status should read ‘Handover’ Extract the hex string describing the waiting resources via SCPI. Note that the contents of this string changes according to the setup of the 8960 and potentially the setup on the PXT.
Agilent PXT Wireless Communications Test Set User’s Guide Figure 5 - 14: TargetRAT Message Container = Hex as Extracted via SCPI from 8960 9. Add this message to the ‘Handover Message List’ on the Extended tab. 10. Save the scenario file. The scenario file is now ready for the SRVCC test. The above Phase 1 is only required to create the mobility message, and does not need to be performed again unless the 8960 configuration changes. Phase 2 – SRVCC Execution 1. 7. 8.
Agilent PXT Wireless Communications Test Set User’s Guide Limitations No Support for SRVCC with PS Handover This SRVCC solution cannot perform a handover of both the IMS call to CS and PS Handover at the same time. If IP connectivity is required at another bearer following the handover, then the Routing Area Update procedure can re-establish it. No Support for Audio Transcoding If end-to-end audio testing is required, the audio codec used before the handover is the only one which can be used post-handover.
Agilent PXT Wireless Communications Test Set User’s Guide 6 RF Measurements This section provides a brief summary of how the RF measurements in the E6621A PXT are organized and a short description of what each measurement does. These measurements are accessed by selecting the Signal Analysis SA front-panel key. There are three Signal Analysis modes: LTE, Spectrum, and Agilent VSA.
Agilent PXT Wireless Communications Test Set User’s Guide Frequency Sets the uplink or downlink frequency, or both, for the system. Refer to the Freq – Key Menu 1 in the Front-panel and Menu Keys chapter for more information. Key Path: Freq Preset: UL/DL Frequency: UL Frequency: DL Frequency: Range: E6621-503: 350 MHz – 3 GHz 1.95 GHz 1.95 GHz 2.14 GHz E6621-506: 350 MHz – 6 GHz Default Units: GHz Notes: The same receiver is used for measurements and link maintenance.
Agilent PXT Wireless Communications Test Set User’s Guide RF2 Modulation On Source Level The same level can be set on both sources using the Amplitude setting or the two sources can be set to different values using the RF1 Amplitude or RF2 Amplitude settings. Each source may be offset for path loss or gain using the RF1 Output Power Offset and RF2 Output Power Offset. The source power will be increased by the value of the power offset.
Agilent PXT Wireless Communications Test Set User’s Guide Key Path: Atten Preset: RF 1 and RF2 reference level 0 dBm RF 1 and RF2 attenuation mode Auto RF1 and RF2 attenuation value 49 dB RF1 and RF2 power offset 0 dB Notes: The Ref Level and the Scale/Div settings are applied to all the Power Spectrum and Power vs. Time displays. Refer to the Atten > Attenuation = Adaptive in the Attenuation section for more information on compensating for External loss or gain.
Agilent PXT Wireless Communications Test Set User’s Guide Selecting Exponential means that once the averaging count is reached the measurement will continue averaging the same number of results by adding the latest sample and deleting the oldest sample. Instead of averaging, the measurement can be set for Max Hold. Turning Max Hold disables averaging and vice versa.
Agilent PXT Wireless Communications Test Set User’s Guide Uniquely, the Spectrum measurement supports a marker table which is enabled using the Marker Table setting. Marker To Key Path: Function > Marker To The Mkr -> CF setting changes the tuned frequency to the absolute frequency value of the active marker. If the active marker is in Delta mode, the relative frequency value is first converted to an absolute frequency value. This feature is not available for time domain measurements.
Agilent PXT Wireless Communications Test Set User’s Guide If a call is made to the BSE using the default BSE settings, then the default measurement settings match and no further measurement setting changes are required. General Purpose Measurements Key Path: SA > Spectrum This section describes the general purpose measurements available in the PXT. These measurements allow more flexible selection of parameters than the specific LTE measurements.
Agilent PXT Wireless Communications Test Set User’s Guide Measurement Setup Access the frequency Span for the Power Spectrum graphic and the resolution bandwidth (RBW) for the measurement, by selecting the Func front-panel key. The maximum available span is 22 MHz, which can be set directly using the Span menu key or selecting the Full Span menu key. Selecting Last Span toggles between the two most recent span settings.
Agilent PXT Wireless Communications Test Set User’s Guide The Integration BW setting specifies the bandwidth over which power is integrated for the channel power measurement. Occupied Bandwidth Measurement Key Path: Mode > SA > Spectrum > MEAS > Occupied BW Figure 6-3: Occupied Bandwidth measurement The Occupied BW measurement looks at the total power in a span of twice the nominal system bandwidth.
Agilent PXT Wireless Communications Test Set User’s Guide Last Span toggles between the two most recent span settings. The RBW defaults to an auto setting of 10 kHz, but can also be set manually. Access the OBW Power setting by selecting the Meas Setup front-panel key. This setting specifies the percentage value of power contained within the OBW measurement result. For example, if OBW Power is set to 99%, the OBW result means that 99% of the power is contained within that bandwidth.
Agilent PXT Wireless Communications Test Set User’s Guide Measurement Setup Access the Measurement Interval setting by selecting the Meas Setup front-panel key. This setting must be specified first. This will occur at the delayed trigger event. Once the measurement interval is specified the number of power samples to consider for the CCDF calculation can either be set directly using the Count setting or indirectly using the Measurement Cycles setting.
Agilent PXT Wireless Communications Test Set User’s Guide Channel Power Measurement (FDD/TDD) Key Path: Mode > SA > LTE > Channel Power Figure 6-5: Channel Power measurement The Channel Power measurement captures 10 sub-frames as represented by the indices 0-9 in the Figure above. Each of the ten intervals can be edited to a specific start time and duration time for general purposes. For example, you might want to exclude 20 µsec transition periods on the sub-frame index 0 boundaries.
Agilent PXT Wireless Communications Test Set User’s Guide Channel Power Measurement (TDD Example) Key Path: Mode > SA > LTE > Channel Power Figure 6-6: Channel Power measurement (TDD Example) Notice the power levels are only present on subframes 2, 3, 7, and 8. This is because the UE only transmits on those subframes, when using TDD. For this example, the UL-DL configuration selected is 6. You can graphically display any of the 10 measured subframes by pressing Meas Setup > Display Interval.
Agilent PXT Wireless Communications Test Set User’s Guide Occupied Bandwidth Measurement (FDD/TDD) Key Path: Mode > SA > LTE > Occupied BW The Occupied Bandwidth measurements in LTE and Spectrum measurement modes are identical. See “General Purpose Measurements” on page 195 for details. Occupied Bandwidth Measurement (TDD Example) Key Path: Mode > SA > LTE > Occupied BW Below, the OBW measurement using TDD is displayed.
Agilent PXT Wireless Communications Test Set User’s Guide Power vs. Time (FDD/TDD) Key Path: Mode > SA > LTE > Power vs. Time Figure 6-8: Power vs. Time measurement (FDD Example) The Power vs. Time measurement can be used to verify that the UE is transmitting at the correct power level on different subframes. For example, if the only allocation is in subframe 0 and 5, there should only be signal power in the 0 ms to 1 ms interval and 5 to 6 ms of the Power Vs. Time trace.
Agilent PXT Wireless Communications Test Set User’s Guide Power vs. Time (TDD Example) Key Path: Mode > SA > LTE > Power vs. Time Figure 6-9: Power vs. Time measurement (TDD) In the figure above, a TDD PvT measurement was taken as example using the Uplink-downlink configuration equal to 6. Notice that the UE is only transmitting on those subframes 2,3,7 and 8 according to the UL-DL TDD configuration. Measurement Setup Set the measurement sweep time by selecting Func Setup > Sweep > Sweep Time.
Agilent PXT Wireless Communications Test Set User’s Guide As an example of how these settings are used, if there are three measurement intervals of Gate Length 1 ms, a Gate Delay of 500 us and a Gate Delta of 2 ms, the three measurement intervals are .500 ms to 1.5 ms, 2.5 ms to 3.5 ms and 4.5 ms to 5.5 ms.
Agilent PXT Wireless Communications Test Set User’s Guide 2. Set the trigger delay = 2 ms by pressing Func Setup > Trigger> Internal Trigger > Trigger Delay, 2, ms. Figure 6-11: SEM measurement (TDD) Measurement Setup The frequency span of the measurement is fixed at 70 MHz. This is the span required for the 20 MHz system bandwidth. Select the Meas Setup front-panel key to access the settings described below. Use the Select Mask menu key to select from ten masks. Masks are initially undefined.
Agilent PXT Wireless Communications Test Set User’s Guide The Segment Side setting specifies whether the segment is a positive and negative frequency pair or just one-sided. The Integration BW of each segment can be specified independently. Having specified a segment, it is necessary to define what type of limit that segment should be tested against. This is done through the Fail menu.
Agilent PXT Wireless Communications Test Set User’s Guide 2. Set the trigger delay = 2 ms by pressing Func Setup > Trigger> Internal Trigger > Trigger Delay, 2, ms. Measurement Setup The frequency span of the measurement is fixed for a given system bandwidth. Access the Carrier Setup menu, by selecting the Meas Setup front-panel key. One or two carriers can be specified using the Number of Carriers setting.
Agilent PXT Wireless Communications Test Set User’s Guide When the UE is in test mode, you must configure the measurement settings manually. PXT Settings When Mode > SA > LTE > Mode Setup > AutoConfig is set to On, the settings shown in the table below are automatically configured to those currently set in the PXT. (There must be a call in progress.
Agilent PXT Wireless Communications Test Set User’s Guide Scenario File Settings When Mode > SA > LTE > Mode Setup > AutoConfig is set to On, the settings shown in the table below are automatically set to those same values determined by the currently loaded scenario file. (There must a call in progress.
Agilent PXT Wireless Communications Test Set User’s Guide • Special Subframe Config. Index - determines how special subframes (which contain both DL and UL) are composed as in how many symbols are used for DL and how many for UL. These settings, available under Frame Structure (TDD) are grayed out when SA > Mode Setup > Auto-Config = On.. Cell ID sets the physical (PHY) layer Cell ID. This PHY-layer Cell ID determines the Cell ID Group and Cell ID Sector.
Agilent PXT Wireless Communications Test Set User’s Guide PUCCH Settings When you set Mode > SA > LTE > Mode Setup > Auto Config to On, the settings discussed below are configured automatically.. nCS-AN is the layer 3 name for the PHY setting Ncs. nRB-CQI is the layer 3 name for the PHY setting NRB. Delta PUCCH Shift CQI is the layer 3 name for the PHY setting ∆shiftPUCCH. Refer to TS 3GPP 36.211, 5.4 for further information on these settings.
Agilent PXT Wireless Communications Test Set User’s Guide Modulation Quality Summary Figure 6-13: Modulation Quality Summary Key Path: Mode > SA > LTE > Meas > UL Demodulation The modulation quality summary provides you with the information you need to comply with 3GPP Test Specification (TS) 36.521.1 requirements. Frequency error, IQ Offset, and EVM are calculated for each slot and the overall summary is displayed in the lower section of the window, as shown in the figure above.
Agilent PXT Wireless Communications Test Set User’s Guide For each slot in the measurement interval, the early window EVM and late window EVM values are calculated as defined by the 3GPP TS 3GPP 36.521-1. Each measurement is defined in detail in the section of this specification as shown below: Early Window and Late Window EVM Calculations Measurement Calculation Compliance with 3GPP 36.521-1, section: PUSCH Data EVM E.4.1 PUSCH DMRS EVM E.4.6 PUCCH EVM E.5.9.
Agilent PXT Wireless Communications Test Set User’s Guide Constellation Measurement Key Path: Mode > SA > LTE > UL Demodulation > Constellation Figure 6-14: Constellation measurement Use this measurement to view the constellation diagram for PUSCH and PUCCH reference signals, and data. Numeric results for PRACH, PUCCH, PUSCH and SRS are also presented.
Agilent PXT Wireless Communications Test Set User’s Guide Power Spectrum Measurement Key Path: Mode > SA > LTE > UL Demodulation > Power Spectrum Figure 6-15: Power Spectrum measurement This measurement displays a frequency domain graphic of the subcarrier powers for a selected symbol, and time domain graphics of the IQ signal over a radio frame. Additionally, the numeric results presented by the Constellation measurement are also presented here.
Agilent PXT Wireless Communications Test Set User’s Guide The Power Spectrum Subframe Select setting enables you to select which subframe in the radio frame to make the measurements. For example, in TDD mode, you would select subframe #2. Received IQ Data Measurement Key Path: Mode > SA > LTE > UL Demodulation > Received I/Q Data Figure 6-16: Received IQ Data measurement Use this measurement to see resource element IQ component magnitudes in tabular and graphic form.
Agilent PXT Wireless Communications Test Set User’s Guide The blue outlined box overlaying the I and Q graphics indicates the ten subcarriers listed in the table. Use the Subcarrier setting to set the index of the first subcarrier in the table. The Power Spectrum Subframe Select setting enables you to select which subframe in the radio frame to make the measurements. For example, in TDD mode, you would select subframe #2.
Agilent PXT Wireless Communications Test Set User’s Guide Error Vector Measurement Key Path: Mode > SA > LTE > UL Demodulation > Error Vector Figure 6-18: Error Vector Spectrum measurement The Error Vector measurement presents the EVM results in two graphics. The Error Vector Spectrum shows the EVM result of each subcarrier for the selected symbol – the horizontal axis is subcarrier index.
Agilent PXT Wireless Communications Test Set User’s Guide The Subcarrier setting moves the marker in the Error Vector Spectrum graphic. The marker value, displayed in the bottom right-hand corner of the Error Vector Spectrum graphic, is then the EVM value for the resource element indexed by the Symbol and Subcarrier settings. The Error Vector Subframe Select setting enables you to select which subframe in the radio frame to make the measurements. For example, in TDD mode, you would select subframe #2.
Agilent PXT Wireless Communications Test Set User’s Guide Measurement Setup Uplink Config Use the Target Subframe setting in the Uplink Config menu to select the required subframe for this measurement. Spectrum Flatness Measurement Key Path: Mode > SA > LTE > UL Demodulation > Flatness Figure 6-20: Spectrum Flatness measurement The Spectrum Flatness measurement determines the power of each active uplink subcarrier.
Agilent PXT Wireless Communications Test Set User’s Guide Two ranges are specified as follows: Range 1 (RP1): FUL_Meas – FUL_Low ≥ 3 MHz and FUL_High – FUL_Meas ≥ 3 MHz Range 2 (RP2): FUL_Meas – FUL_Low < 3 MHz or FUL_High – FUL_Meas < 3 MHz Where FUL_Meas refers to the sub-carrier frequency for which the equalizer coefficient is evaluated and FUL_Low and FUL_High refer to each E-UTRA frequency band.
Agilent PXT Wireless Communications Test Set User’s Guide 7 Tips and Tricks UE is not connecting. The PXT may not be detecting the PRACH from the UE. Use the PXT default values for attenuation or set Atten > Attenuation = Adaptive. The scenario file contains settings which define the UE’s preamble starting power and power ramping when trying to establish a connection. It is important that they match the PXT receiver’s default expected power levels.
Agilent PXT Wireless Communications Test Set User’s Guide UE Connection Manager Setup On UE Host: Check "ipconfig" shows the LTE adapter/UE with assigned expected IP addresses. If no IP Address is setup for the UE, Check UE Connection Manager is setup correctly. Check PXT Bearer Configuration is setup correctly. For UE USB devices running through a host machine or UE tethered testing, Ipconfig should display the LTE adapter interface with assigned IP addresses. Check these are present and as expected.
Agilent PXT Wireless Communications Test Set User’s Guide Verify PXT Attenuation is set Correctly The most common reason for a PXT BLER value is that the attenuation is set either too low or too high. Ensure the OVF flag is clear. If the OVF alarm is raised, E2E data rates may show BLER (StatDTX/NAKs/Packet loss). Correct this by adjusting the Attenuation. Usually, setting Atten > Attenuation > to Adaptive on the PXT auto adjusts this for you. Make sure the UE supports Adaptive Attenuation.
Agilent PXT Wireless Communications Test Set User’s Guide Refer to the Cat 3 MCS/RB Table in the E2E Setup and Benchmarking Guide section of this manual for the maximum Cat 3 setup. Faulty RF cable or connectors. If all other attempts have failed to resolve this issue, try swapping out the RF connectors / cables for new tested cables. Sometimes RF cables become faulty and produce unexpected RF results.
Agilent PXT Wireless Communications Test Set User’s Guide Monitor CPU usage while running multiple TCP streams/threads to ensure it does not exceed 90 %. Bi-directional TCP – Low rate observed Running bi-directional Iperf TCP streams can show low bitrates either at the DL or UL streams. Iperf ramps the bitrate up to maximum on both directions, and depending on which side saturates the bandwidth, the other side is starved of bandwidth for required TCP ACKs.
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Agilent PXT Wireless Communications Test Set User’s Guide 8 Troubleshooting WARNING No operator serviceable parts inside. Refer servicing to qualified personnel. To prevent electrical shock do not remove covers. Upgrading Your Instrument Software If you are having problems, the solution may be as simple as upgrading your instrument software. Agilent periodically releases software updates to fix known defects and incorporate product enhancements.
Agilent PXT Wireless Communications Test Set User’s Guide Functional Check This functional check is only available if you have Option N6051A RF Parametric Test with Test Mode Signaling installed on your PXT. Turn on the instrument. Wait until the boot procedure completes: indicated by the appearance of the Base Station Emulator startup screen. With no cabling connected to the front-panel, perform the following: • Press the Amp key and set the RF1 output power to 0 dBm.
Agilent PXT Wireless Communications Test Set User’s Guide Resetting the AC Mains Circuit Breaker If the PXT is connected to an AC source and encounters an over-current condition, the circuit breaker on the rear panel will trip to prevent damage to the instrument. Complete the following steps to reset the circuit breaker. 1. Turn the off the front-panel power button. 2. Disconnect the AC power cable. 3. Depress the circuit breaker to reset it. 4. Reconnect the AC power cable. 5.
Agilent PXT Wireless Communications Test Set User’s Guide Returning Your Test Set for Service Calling Agilent Technologies Agilent Technologies has offices around the world to provide you with complete support for your wireless test set. To obtain servicing information or to order replacement parts, contact the nearest Agilent Technologies office listed below. In any correspondence or telephone conversations, refer to your test set by its product number, full serial number, and software revision.
Agilent PXT Wireless Communications Test Set User’s Guide Service and Support Americas Brazil (11) 4197 3600 Canada (877) 894 4414 Mexico 01800 5064 800 Australia 1 800 629 485 India 1 800 112 929 Malaysia 1 800 888 848 China 800 810 0189 Japan 0120 (421) 345 Singapore 1 800 375 8100 Hong Kong 800 938 693 Korea 080 769 0800 Taiwan 0800 047 866 Belgium 32 (0) 2 404 93 40 Ireland 1890 924 204 Spain 34 (91) 631 3300 Denmark 45 45 80 12 15 Israel 972-3-9288-504/544 Sweden 0200-88 22 55 Finlan
Agilent PXT Wireless Communications Test Set User’s Guide Software and Technical Support Contracts If you have a Software and Technical Support Contract, there are three methods of accessing your technical support: • Web-based support: My Support Center • E-mail support • Phone support For fastest response times, we recommend using the web-based or email access methods as these provide the most direct route to your technical support expert.
Agilent PXT Wireless Communications Test Set User’s Guide 9 Appendix A - Message Editor Fields Overwritten by Front-panel Keys When a scenario file is loaded on the PXT, the parameters from the scenario file that have PXT menu keys associated with them are updated on the PXT to reflect the values from the scenario file.
Agilent PXT Wireless Communications Test Set User’s Guide Message Editor Field PXT Menu Key Key Path p0-NominalPUSCH contributes towards the power of the PUSCH and is carried in SIB2. p0-NominalPUSCH BSE > Mode Setup> More > RRC Settings p0-UE-PUSCH contributes towards PUSCH power and is carried in the (RRC Connection) Setup message. p0-UE-PUSCH BSE > Mode Setup> More > RRC Settings defaultPagingCycle controls how frequently the UE can be paged and is contained in SIB2.
Agilent PXT Wireless Communications Test Set User’s Guide Message Editor Field PXT Menu Key Key Path shortDRX-Cycle is related to Connected Mode DRX and is present in the RRC Connection Reconfiguration message. shortDRX-Cycle BSE > Mode Setup> More > RRC Settings > More shortDRX-CycleTimer is related to Connected Mode DRX and is present in the RRC Connection Reconfiguration message.
Agilent PXT Wireless Communications Test Set User’s Guide Message Editor Field PXT Menu Key Key Path MNC BSE > Mode Setup> More > NAS Settings 2 or 3 Digit MNC BSE > Mode Setup> More > NAS Settings NAS Ciphering Algorithm controls the Ciphering Algorithm selected for use in the Non Access Stratum. This is signaled in the EMM layer’s Security Mode Command.
Agilent PXT Wireless Communications Test Set User’s Guide Message Editor Field PXT Menu Key Key Path DNS State controls whether a DNS address will be assigned to the UE in the Activate Default EPS Bearer Context Request message. DNS State BSE > Mode Setup> More > NAS Settings > Default EPS Bearer Config #(1-4) DNS Address Type controls what type of IP address (IPv4, IPv6 or IPv4v6) is assigned as a DNS address in the Activate Default EPS Bearer Context Request message.
Agilent PXT Wireless Communications Test Set User’s Guide Message Editor Field PXT Menu Key Key Path V6 P-CSCF Address controls the IPv6 address that is assigned as the IP address of the P-CSCF server – assuming the PCSCF State has enabled this.
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