Measurement device, measurement system, and measurement method

Abstract

To provide a measuring device and a measuring system that can prevent measurement failures due to parameter discrepancies and can improve measurement work efficiency by reducing the number of steps required for parameter input.SOLUTION: A measuring device includes a terminal simulation unit 2 that simulates a wireless terminal, a DU simulation unit 3 that simulates an O-DU, and a control unit 4 that, when performing an uplink test on the DUT100, stores parameters set by the user when generating waveform data to be transmitted to the DUT100, and uses the stored parameters as parameters when decoding IQ data extracted from the uplink packet data output from the DUT100.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a measurement device and a measurement system for testing an O-RU (O-RAN Radio Unit) by simulating an O-DU (O-RAN Distributed Unit) and a radio terminal of an O-RAN (Open-Radio Access Network). [Background technology]

[0002] In wireless communication networks, one architecture for the Radio Access Network (RAN) that is located between the core network and terminals and consists of base stations that control the wireless layer is the C-RAN (Centralized RAN), which extends multiple wireless units from the baseband processing unit of a centrally installed base station device and connects them via optical fiber or other means.

[0003] In C-RAN, there are insufficient standard specifications for the interface between the baseband processing unit and the radio unit, and many areas are specified independently by each vendor, making it difficult to achieve interoperability between baseband processing units and radio units from different vendors.

[0004] To solve these problems, the O-RAN fronthaul specification was formulated, which divides the functions of the radio access network into the O-DU, which acts as the baseband processing unit, and the O-RU, which acts as the radio unit, and specifies the functions of each.

[0005] The O-RAN fronthaul specifications include the C / U / S-Plane (Control, User and Synchronization Plane) specifications, which define the details of equipment operation, and the M-Plane (Management Plane) specifications.

[0006] Patent Document 1 describes a measurement device that includes a group of control target devices, which includes at least a plurality of emulators that simulate each of the constituent devices of the group of constituent devices that make up Open RAN as control target devices, and that includes a group of device control units that each control the controlled devices of the group of control target devices; the device sets a constituent device selected from the group of constituent devices as a measurement target device; the user is allowed to set the order in which the device control units in the group of device control units that are used to test the measurement target devices are used; and the device control units used for the test are used in the set order of use to execute a test case. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2023-150092 Summary of the Invention [Problem to be solved by the invention]

[0008] In the 3GPP (3rd Generation Partnership Project) TS38.141-1 Uplink test targeting the O-RU, waveform data created using waveform data generation software is sent as an RF (radio frequency) signal to the O-RU under test, and the IQ (In-Phase / Quadrature-Phase) data output from the O-RU is subjected to LDPC (Low Density Parity Check) decoding to calculate the BLER (Block Error Rate).

[0009] When performing such a BLER test, the user must manually input the parameters required for LDPC decoding, which is time-consuming and can lead to input errors.

[0010] Therefore, the present invention aims to provide a measurement device and a measurement system that can prevent measurement failures due to parameter discrepancies by using the parameters used when generating waveform data as parameters used when decoding, and can reduce the labor required for parameter input, thereby improving measurement work efficiency. [Means for solving the problem]

[0011] The measurement device of the present invention is a measurement device (1) comprising a terminal simulation unit (2) that simulates a wireless terminal, a DU simulation unit (3) that simulates an O-DU, and a control unit (4) that controls the terminal simulation unit and the DU simulation unit to test an O-RU device (100), wherein when performing an uplink test of the O-RU device, the control unit stores parameters set by a user when generating waveform data to be transmitted to the O-RU device, and uses the stored parameters as parameters when decoding IQ data extracted from uplink packet data output from the O-RU device.

[0012] With this configuration, when performing an uplink test on an O-RU device, the parameters set by the user are stored when generating the waveform data to be sent to the O-RU device, and the stored parameters are used when decoding the IQ data extracted from the uplink packet data output from the O-RU device. This prevents measurement failures due to parameter discrepancies and reduces the labor required to enter parameters, improving measurement efficiency.

[0013] The measurement system of the present invention is a measurement system (11) comprising a terminal simulation device (12) that simulates a wireless terminal, a DU simulation device (13) that simulates an O-DU, and a control device (14) that controls the terminal simulation device and the DU simulation device to test an O-RU device (100), wherein when performing an uplink test of the O-RU device, the control device stores parameters set by a user when generating waveform data to be transmitted to the O-RU device, and uses the stored parameters as parameters when decoding IQ data extracted from uplink packet data output from the O-RU device.

[0014] With this configuration, when performing an uplink test on an O-RU device, the parameters set by the user are stored when generating the waveform data to be sent to the O-RU device, and the stored parameters are used when decoding the IQ data extracted from the uplink packet data output from the O-RU device. This prevents measurement failures due to parameter discrepancies and reduces the labor required to enter parameters, improving measurement efficiency.

[0015] The measurement method of the measurement device of the present invention is a measurement method for a measurement device (1) comprising a terminal simulation unit (2) that simulates a wireless terminal, a DU simulation unit (3) that simulates an O-DU, and a control unit (4) that controls the terminal simulation unit and the DU simulation unit to test an O-RU device (100), and when performing an uplink test of the O-RU device, comprises the steps of generating waveform data to be transmitted to the O-RU device based on parameters set by a user, storing the parameters set by the user, and using the stored parameters to decode IQ data extracted from uplink packet data output from the O-RU device.

[0016] With this configuration, when performing an uplink test on an O-RU device, the parameters set by the user are stored when generating the waveform data to be sent to the O-RU device, and the stored parameters are used when decoding the IQ data extracted from the uplink packet data output from the O-RU device. This prevents measurement failures due to parameter discrepancies and reduces the labor required to enter parameters, improving measurement efficiency.

[0017] The measurement method of the measurement system of the present invention is a measurement method for a measurement system (11) comprising a terminal simulation device (12) that simulates a wireless terminal, a DU simulation device (13) that simulates an O-DU, and a control device (14) that controls the terminal simulation device and the DU simulation device to test an O-RU device (100), and when performing an uplink test of the O-RU device, the measurement method comprises the steps of: generating waveform data to be transmitted to the O-RU device based on parameters set by a user; storing the parameters set by the user; and using the stored parameters to decode IQ data extracted from uplink packet data output from the O-RU device.

[0018] With this configuration, when performing an uplink test on an O-RU device, the parameters set by the user are stored when generating the waveform data to be sent to the O-RU device, and the stored parameters are used when decoding the IQ data extracted from the uplink packet data output from the O-RU device. This prevents measurement failures due to parameter discrepancies and reduces the labor required to enter parameters, improving measurement efficiency. [Effects of the Invention]

[0019] The present invention can provide a measurement device and a measurement system that can prevent measurement failures due to parameter discrepancies and can reduce the number of steps required to input parameters, thereby improving measurement work efficiency. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a block diagram of a measurement device according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a block diagram of a measurement system according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] (First embodiment) A measuring device according to a first embodiment of the present invention will be described in detail below with reference to the drawings.

[0022] In FIG. 1, a measurement device 1 according to a first embodiment of the present invention is connected to an O-RU device as a DUT (Device Under Test) 100 via a wired connection such as a coaxial cable or an optical fiber line, and performs measurement tests on the DUT 100 by simulating a wireless terminal and an O-DU.

[0023] The measurement device 1 includes a terminal simulation unit 2, a DU simulation unit 3, and a control unit 4. The terminal simulation unit 2 simulates a wireless terminal and transmits and receives RF signals to and from the DUT 100 via a wired connection.

[0024] The DU simulation unit 3 simulates an O-DU and transmits and receives signals to and from the DUT 100 via an optical fiber line.

[0025] The control unit 4 is composed of a computer unit having, for example, a CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory), flash memory, a hard disk drive, an input port, and an output port.

[0026] This computer unit is configured so that the CPU can control devices connected to the input and output ports by executing an OS (Operating System) stored in a hard disk drive, for example.

[0027] The control unit 4 includes an operation unit 41 and a display unit . The operation unit 41 is configured with input devices such as a keyboard, a mouse, and a touch panel, and outputs information input by operation to the control unit 4.

[0028] The display unit 42 is configured, for example, by an image display device such as a liquid crystal display, and displays images for inputting information necessary for setting up the measurement, images showing the status during the measurement, and the like.

[0029] The control unit 4 controls the terminal simulation unit 2 and the DU simulation unit 3 to perform a measurement test on the DUT 100 .

[0030] When performing an uplink test on the DUT 100, the control unit 4 causes the terminal simulation unit 2 to transmit waveform data created in accordance with parameters set by the user to the DUT 100 as an RF signal.

[0031] The DU simulation unit 3 captures uplink packet data output from the DUT 100 , extracts IQ data from the packet data, and outputs the IQ data to the control unit 4 .

[0032] The control unit 4 performs LDPC decoding on the IQ data, then performs a CRC check, summarizes the results of the CRC check, calculates the BLER, and displays the BLER results on the display unit 42 as a graph or the like.

[0033] It should be noted that parameter settings are also required for the LDPC decoding process in the control unit 4, and if the parameter settings do not match the settings when the waveform data was generated, decoding will fail.

[0034] For this reason, the control unit 4 stores the contents of the parameters that were set when the waveform data was generated, and obtains the parameters required for the LDPC decoding process, and uses them for the LDPC decoding process.

[0035] Parameters necessary for LDPC decoding include, for example, a Radio Network Temporary Identifier (RNTI), a Modulation and Coding Scheme (MCS) Index, an MCS Table, a Redundancy version, and a Transport Block Size (TBS).

[0036] The RNTI is an identifier of a radio channel and is used to distinguish one radio channel from another.

[0037] The MCS index is a number that indicates which MCS (combination of modulation method and coding rate) to use for the uplink waveform. The MCS is determined to optimize the communication conditions depending on the wireless terminal environment (good or bad signal quality, etc.), and the MCS is specified by which MCS table to use and the MCS number (MCS index) within that table.

[0038] The MCS Table lists various MCSs, and there are multiple tables from which to select.

[0039] The redundancy version is a value that indicates what type of redundant data is added when sending data with redundant data. When data fails to be received and is resent, a different redundancy version is used to send the data (i.e., different redundant data is used), and if reception fails again, a different redundancy version is used to send the data, and this process is repeated. In this case, the receiving side is more likely to receive the data successfully by storing the redundant data of the redundancy version rather than discarding it. TBS is the size of the data to be transmitted.

[0040] As described above, in the first embodiment, when performing an uplink test on the DUT 100, the control unit 4 stores parameters set by the user when generating waveform data, and uses the stored parameters as parameters when performing LDPC decoding processing on the IQ data extracted from the uplink packet data output from the DUT 100.

[0041] This makes it possible to prevent measurement failures due to parameter discrepancies, and also to reduce the number of steps required for parameter input, thereby improving the efficiency of measurement work.

[0042] (Second embodiment) Next, a measurement system according to a second embodiment of the present invention will be described.

[0043] In Figure 2, the measurement system 11 according to the second embodiment of the present invention is connected to an O-RU device as a DUT 100 via a wired connection such as a coaxial cable or an optical fiber line, and performs measurement tests on the DUT 100 by simulating a wireless terminal and an O-DU.

[0044] The measurement system 11 includes a terminal simulation device 12, a DU simulation device 13, and a control device .

[0045] The terminal simulation device 12 simulates a wireless terminal and transmits and receives RF signals via wire to and from the DUT 100. The terminal simulation device 12 is configured as, for example, the terminal simulation unit 2 of the first embodiment as a device.

[0046] The DU pseudo device 13 simulates an O-DU, and transmits and receives signals via an optical fiber line to and from the DUT 100. The DU pseudo device 13 is configured, for example, as the DU pseudo unit 3 of the first embodiment.

[0047] The control device 14 is configured by, for example, a computer unit equipped with a CPU, RAM, ROM, flash memory, a hard disk drive, an input port, and an output port.

[0048] This computer unit is configured so that the CPU can control devices connected to the input and output ports by executing an OS stored in a hard disk drive, for example.

[0049] The control device 14 includes an operation unit 141 and a display unit 142 . The operation unit 141 is configured with input devices such as a keyboard, a mouse, and a touch panel, and outputs information input by operation to the CPU.

[0050] The display unit 142 is configured, for example, with an image display device such as a liquid crystal display, and displays images for inputting information required for setting up the measurement, images showing the status during the measurement, and the like.

[0051] The control device 14 controls the terminal simulation device 12 and the DU simulation device 13 to perform a measurement test on the DUT 100 .

[0052] When performing an uplink test on the DUT 100, the control device 14 causes the terminal simulation device 12 to transmit waveform data created in accordance with parameters set by the user to the DUT 100 as an RF signal.

[0053] The DU pseudo device 13 captures uplink packet data output from the DUT 100, extracts IQ data from the packet data, and outputs the IQ data to the control device 14.

[0054] The control device 14 performs LDPC decoding on the IQ data, then performs a CRC check, summarizes the results of the CRC check, calculates the BLER, and displays the BLER results on the display unit 142 as a graph or the like.

[0055] The control device 14 stores the contents of the parameters that were set when the waveform data was generated, and obtains the parameters required for LDPC decoding processing, and uses them for the LDPC decoding processing.

[0056] Parameters necessary for LDPC decoding processing include, for example, RNTI, MCS Index, MCS Table, Redundancy version, and TBS.

[0057] As described above, in the second embodiment, when performing an uplink test on the DUT 100, the control device 14 stores the parameters set by the user when generating waveform data, and uses the stored parameters as parameters when performing LDPC decoding processing on the IQ data extracted from the uplink packet data output from the DUT 100.

[0058] This makes it possible to prevent measurement failures due to parameter discrepancies, and also to reduce the number of steps required for parameter input, thereby improving the efficiency of measurement work.

[0059] While an embodiment of the present invention has been disclosed, it will be apparent to one skilled in the art that modifications may be made thereto without departing from the scope of the present invention, and it is intended that all such modifications and equivalents be included in the following claims. [Explanation of symbols]

[0060] 1. Measuring equipment 2 Terminal pseudo part 3 DU pseudo part 4. Control Unit 11 Measurement System 12 Terminal pseudo-devices 13 DU pseudo device 14 Control device 100 DUT(O-RU equipment)

Claims

1. a terminal simulation unit (2) that simulates a wireless terminal; a DU simulation unit (3) that simulates an O-DU; A measurement device (1) comprising a control unit (4) that controls the terminal simulation unit and the DU simulation unit to test an O-RU device (100), When performing an uplink test on the O-RU device, the control unit stores parameters set by the user when generating waveform data to be transmitted to the O-RU device, and uses the stored parameters as parameters when decoding IQ data extracted from the uplink packet data output from the O-RU device.

2. a terminal simulation device (12) that simulates a wireless terminal; a DU simulation device (13) that simulates an O-DU; A measurement system (11) comprising a control device (14) that controls the terminal simulation device and the DU simulation device to test an O-RU device (100), When performing an uplink test on the O-RU device, the control device stores parameters set by the user when generating waveform data to be sent to the O-RU device, and uses the stored parameters as parameters when decoding IQ data extracted from the uplink packet data output from the O-RU device.

3. A measurement method for a measurement device (1) comprising a terminal simulation unit (2) that simulates a wireless terminal, a DU simulation unit (3) that simulates an O-DU, and a control unit (4) that controls the terminal simulation unit and the DU simulation unit to test an O-RU device (100), generating waveform data to be transmitted to the O-RU device based on parameters set by a user when performing an uplink test on the O-RU device; storing the parameters set by the user; and a step of decoding IQ data extracted from uplink packet data output from the O-RU device using the stored parameters.

4. A measurement method for a measurement system (11) including a terminal simulation device (12) that simulates a wireless terminal, a DU simulation device (13) that simulates an O-DU, and a control device (14) that controls the terminal simulation device and the DU simulation device to test an O-RU device (100), generating waveform data to be transmitted to the O-RU device based on parameters set by a user when performing an uplink test on the O-RU device; storing the parameters set by the user; and a step of decoding IQ data extracted from uplink packet data output from the O-RU device using the stored parameters.

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