JP5070238B2 - Mobile communication device test system and test method - Google Patents

Description

  The present invention relates to a mobile communication device test system and a test method, and more particularly, to a mobile communication device test system for performing a test of RFIC (Radio Frequency Integrated Circuit) compliant with LTE (Long Term Evolution). Regarding the method.

  In order to test a device used for mobile communication equipment, a mobile terminal device test system has been proposed (see, for example, Patent Document 1). Conventionally, by transmitting and receiving signals to and from a communication device, the communication device generates an RF (Radio Frequency) signal and a baseband signal, and analyzes the RF signal and baseband signal output from the communication device. I was testing.

JP 2008-17131 A

  Conventionally, communication devices have been tested with a fixed baseband signal sampling rate and setting parameters. For this reason, when transmitting a baseband signal to the RFIC, there has been no request for determining in advance whether or not the baseband signal can be transmitted within the sampling rate received by the RFIC.

  Here, a communication standard called LTE has been proposed as a next-generation mobile communication system. In general, a communication device used in a mobile communication device compliant with LTE is composed of an RFIC and a BBIC (Baseband Integrated Circuit). The RFIC receives a baseband signal, modulates a carrier wave with this baseband signal, sends it as an RF signal for communication with the base station, and receives the RF signal from the base station to demodulate the baseband signal. The function to send out. The BBIC has a function of transmitting data to be transmitted to the RFIC as a baseband signal and processing the baseband signal received from the RFIC as received data.

  There is a movement to standardize communication I / F between such RFIC and BBIC, and the standardized standard is called DigRF. And as a version corresponding to LTE, DigRF Ver. Four standards are being established.

  By the way, DigRF Ver. In 4, the parameters such as the data rate are variable. Depending on the parameter setting, for example, when transmitting baseband signal data from the BBIC to the RFIC, the data to be received by the RFIC cannot be received within the required time (the data to be transmitted by the BBIC is required for the required time). May not be able to be sent within).

  For this reason, when the user of the device test system for mobile communication systems tests the operation of the RFIC without noticing such a situation, there is a possibility that an appropriate test cannot be performed.

  Therefore, the present invention provides a mobile communication device test system or a mobile communication device test method for testing a communication device used as an RFIC, wherein the data rate of a baseband signal transmitted to the communication device is for communication. It is an object of the present invention to make it possible to determine in advance whether or not it is within the sampling rate of a baseband signal received by a device.

  To achieve the above object, a mobile communication device test system according to the present invention generates an RF signal that is used in a mobile communication device that transmits and receives an RF signal to and from a base station and that is modulated with a baseband signal. A mobile communication device test system (30a) for testing a communication device (1), wherein a transmission frame including the baseband signal is transmitted to the communication device to generate the communication device A test execution unit (23) that receives the RF signal to perform the test of the communication device, obtains the data amount of the baseband signal included in the transmission frame transmitted by the test execution unit, and The total amount of data in the entire transmission frame is calculated using the amount of data, and the total data amount and the transmission data rate of the transmission frame from the test execution unit A frame transmission time calculation unit (13a) that calculates a time at which the test execution unit transmits the transmission frame as a frame transmission time; and the baseband signal included in the transmission frame transmitted by the test execution unit. The amount of data and the sampling rate of the baseband signal received by the communication device are acquired, and the time per transmission frame at which the communication device receives the baseband signal using the data amount and the sampling rate. A frame reception time calculation unit (14a) for calculating the frame reception time, and a time comparison unit (15a) for determining whether or not the frame transmission time is within the frame reception time. .

  Since the mobile communication device test system according to the present invention includes a frame transmission time calculation unit, a frame reception time calculation unit, and a time comparison unit, it is possible to determine whether or not the frame transmission time is within the frame reception time. it can. This makes it possible to determine in advance whether the data rate of the baseband signal included in the transmission frame is within the sampling rate of the baseband signal received by the communication device.

The mobile communication device test system of the present invention further includes a time display unit (16a) for displaying a determination result of the time comparison unit, wherein the time comparison unit is a ratio of the frame transmission time to the frame reception time. It is preferable that the time display unit displays the ratio calculated by the time comparison unit.
According to the present invention, it can be clearly displayed whether or not the frame transmission time is within the frame reception time. As a result, the user of the mobile communication device test system has a problem with the data rate of the baseband signal included in the transmission frame and the sampling rate of the baseband signal received by the communication device. It is possible to quickly determine how much room is available.

In the mobile communication device testing system of the present invention, it is preferable that the time display unit displays the ratio calculated by the time comparison unit in a graph.
According to the present invention, the user of the mobile communication device test system can intuitively visually recognize the ratio between the data rate of the baseband signal included in the transmission frame and the sampling rate of the baseband signal received by the communication device. .

  To achieve the above object, a mobile communication device test system according to the present invention generates an RF signal that is used in a mobile communication device that transmits and receives an RF signal to and from a base station and that is modulated with a baseband signal. A mobile communication device test system (30b) for testing a communication device (1), wherein a transmission frame including the baseband signal is transmitted to the communication device to generate the communication device A test execution unit (23) that receives the RF signal to perform the test of the communication device, obtains the data amount of the baseband signal included in the transmission frame transmitted by the test execution unit, and The total amount of data in the entire transmission frame is calculated using the amount of data, and the total data amount and the transmission data rate of the transmission frame from the test execution unit And a transmission frame number calculation unit (13b) for calculating, as the number of transmission frames, the number of transmission frames per unit time at which the test execution unit transmits the transmission frame, and the transmission frame transmitted by the test execution unit. The baseband signal data amount included in the communication device and the sampling rate of the baseband signal received by the communication device are acquired, and the communication device uses the data amount and the sampling rate to obtain the baseband signal. A received frame number calculation unit (14b) that calculates the number of transmission frames per unit time to be received as the number of received frames, and a frame number comparison unit that determines whether the number of transmission frames is equal to or greater than the number of received frames (15b).

  Since the mobile communication device test system according to the present invention includes a transmission frame number calculation unit, a reception frame number calculation unit, and a frame number comparison unit, it is determined whether or not the number of transmission frames is equal to or greater than the number of reception frames. Can do. This makes it possible to determine in advance whether the data rate of the baseband signal included in the transmission frame is within the sampling rate of the baseband signal received by the communication device.

The mobile communication device test system of the present invention further includes a frame number display unit (16b) for displaying a determination result of the frame number comparison unit, wherein the frame number comparison unit includes the number of transmission frames and the number of reception frames. It is preferable that the frame number display unit displays the ratio calculated by the frame number comparison unit.
According to the present invention, it is possible to clearly display whether or not the number of transmission frames is equal to or greater than the number of reception frames. As a result, the user of the mobile communication device test system has a problem with the data rate of the baseband signal included in the transmission frame and the sampling rate of the baseband signal received by the communication device. It is possible to quickly determine how much room is available.

In the mobile communication device testing system of the present invention, it is preferable that the frame number display unit displays the ratio calculated by the frame number comparison unit in a graph.
According to the present invention, the user of the mobile communication device test system can intuitively visually recognize the ratio between the data rate of the baseband signal included in the transmission frame and the sampling rate of the baseband signal received by the communication device. .

  In order to achieve the above object, a mobile communication device testing method of the present invention generates an RF signal that is used in a mobile communication device that transmits and receives an RF signal to and from a base station and is modulated with a baseband signal. A mobile communication device test method for testing a communication device (1), wherein a transmission frame including the baseband signal is transmitted to the communication device, and an RF signal generated by the communication device is generated. And a test execution procedure (S107) for executing the test of the communication device, and before the test execution procedure, the data amount of the baseband signal included in the transmission frame transmitted in the test execution procedure And using the amount of data to calculate the total amount of data in the entire transmission frame, and transmitting the total amount of data and the transmission frame in the test execution procedure. Using the data rate, the time for transmitting the transmission frame in the test execution procedure is calculated as the frame transmission time, and the data amount of the baseband signal included in the transmission frame transmitted in the test execution procedure and the communication A sampling rate of the baseband signal received by the communication device is acquired, and using the amount of data and the sampling rate, a time per transmission frame at which the communication device receives the baseband signal is defined as a frame reception time. And a time comparison procedure (S102, S103) for calculating and determining whether or not the frame transmission time is within the frame reception time.

  Since the mobile communication device test method according to the present invention has the time comparison procedure before the test execution procedure, it can be determined whether or not the frame transmission time is within the frame reception time. This makes it possible to determine in advance whether the data rate of the baseband signal included in the transmission frame is within the sampling rate of the baseband signal received by the communication device.

The mobile communication device testing method of the present invention further includes a time display procedure (S104) for displaying the determination result in the time comparison procedure after the time comparison procedure, and the frame transmission in the time comparison procedure. It is preferable that a ratio between time and the frame reception time is calculated, and the ratio is calculated in the time comparison procedure and displayed in the time comparison procedure.
According to the present invention, it can be clearly displayed whether or not the frame transmission time is within the frame reception time. As a result, the user of the mobile communication device test method has a problem with the data rate of the baseband signal included in the transmission frame and the sampling rate of the baseband signal received by the communication device. It is possible to quickly determine how much room is available.

In the mobile communication device testing method of the present invention, in the time display procedure, the ratio calculated in the time comparison procedure is preferably displayed in a graph.
According to the present invention, the user of the mobile communication device testing method can intuitively visually recognize the ratio between the data rate of the baseband signal included in the transmission frame and the sampling rate of the baseband signal received by the communication device. .

  In order to achieve the above object, a mobile communication device testing method of the present invention generates an RF signal that is used in a mobile communication device that transmits and receives an RF signal to and from a base station and is modulated with a baseband signal. A mobile communication device test method for testing a communication device (1), wherein a transmission frame including the baseband signal is transmitted to the communication device, and an RF signal generated by the communication device is generated. And a test execution procedure (S107) for executing the test of the communication device, and before the test execution procedure, the data amount of the baseband signal included in the transmission frame transmitted in the test execution procedure And using the amount of data to calculate the total amount of data in the entire transmission frame, and transmitting the total amount of data and the transmission frame in the test execution procedure. Using the data rate, the number of transmission frames per unit time for transmitting the transmission frame in the test execution procedure is calculated as the number of transmission frames, and the base included in the transmission frame transmitted in the test execution procedure A data amount of a band signal and a sampling rate of the baseband signal received by the communication device are obtained, and the communication device receives the baseband signal per unit time using the data amount and the sampling rate. And a frame number comparison procedure (S112, S113) for determining whether the number of transmission frames is the number of reception frames and determining whether the number of transmission frames is equal to or greater than the number of reception frames. .

  Since the mobile communication device test method according to the present invention includes the frame number comparison procedure before the test execution procedure, it is possible to determine whether or not the number of transmission frames is equal to or greater than the number of reception frames. This makes it possible to determine in advance whether the data rate of the baseband signal included in the transmission frame is within the sampling rate of the baseband signal received by the communication device.

The mobile communication device testing method of the present invention further includes a frame number display procedure (S114) for displaying a determination result in the frame number comparison procedure after the frame number comparison procedure. Preferably, the ratio between the number of transmission frames and the number of received frames is calculated, and the ratio calculated in the frame number comparison procedure is displayed in the frame number display procedure.
According to the present invention, it is possible to clearly display whether or not the number of transmission frames is equal to or greater than the number of reception frames. As a result, the user of the mobile communication device test method has a problem with the data rate of the baseband signal included in the transmission frame and the sampling rate of the baseband signal received by the communication device. It is possible to quickly determine how much room is available.

In the mobile communication device testing method of the present invention, in the frame number display procedure, the ratio calculated in the frame number comparison procedure is preferably displayed in a graph.
According to the present invention, the user of the mobile communication device test method can intuitively visually recognize the ratio between the data rate of the baseband signal included in the transmission frame and the sampling rate of the baseband signal received by the communication device. .

  The above inventions can be combined as much as possible.

  According to the present invention, in a mobile communication device test system or a mobile communication device test method for testing a communication device used as an RFIC, the data rate of a baseband signal transmitted to the communication device is set for communication. It can be determined in advance whether it is within the sampling rate of the baseband signal received by the device. Thereby, it can be visually confirmed whether there is any problem in the data of the baseband signal created by the user.

1 is a schematic configuration diagram of a mobile communication device test system according to Embodiment 1. FIG. It is a 1st structural example of a transmission frame. It is a 2nd structural example of a transmission frame. It is a display example in a time display part, (a) shows the case of the 1st structural example of a transmission frame, (b) shows the case of the 2nd structural example of a transmission frame. 3 is a flowchart illustrating an example of a mobile communication device test method according to the first embodiment. An example of the parameter setting value of a transmission frame is shown. It is a configuration example of a transmission frame, (a) shows a single frame configuration in the high speed mode, (b) shows a multiframe configuration in the high speed mode, (c) shows a single frame configuration in the low speed mode, (D) shows a multi-frame configuration in the low-speed mode. It is a schematic block diagram of the mobile communication device test system according to the second embodiment. 6 is a flowchart illustrating an example of a mobile communication device test method according to a second embodiment.

  Embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below are examples of the present invention, and the present invention is not limited to the following embodiments. In the present specification and drawings, the same reference numerals denote the same components.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of a mobile communication device test system according to the present embodiment. The mobile communication device test system 30a according to the present embodiment includes a sequence creation device 10a and a test device 20, and tests the communication device 1.

  The communication device 1 is used in a mobile communication device that transmits and receives an RF signal to and from a base station. The mobile communication device is, for example, a mobile phone. In order to transmit and receive an RF signal to and from a base station, a mobile communication device transmits and receives a baseband signal between a BBIC that generates a baseband signal having an in-phase component and a quadrature component, and a baseband signal. An RFIC that generates an RF signal modulated by a band signal is provided. The communication device 1 corresponds to RFIC, and transmits and receives RF signals to and from the base station.

  The sequence creation device 10a includes an operation unit 11, a sequence creation unit 12, a frame transmission time calculation unit 13a, a frame reception time calculation unit 14a, a time comparison unit 15a, and a time display unit 16a. A test sequence to be performed on the device 1 is created. The sequence creation device 10a and the test device 20 may be independent computers or may be integrated.

  The test apparatus 20 includes an IQ data storage unit 21, a sequence storage unit 22, and a test execution unit 23, and executes the test sequence created by the sequence creation device 10a. The test apparatus 20 is configured by a computer including a ROM, a RAM, a CPU, an HDD, an interface, and the like, and controls the IQ data storage unit 21, the sequence storage unit 22, and the test execution unit 23 according to the operation of the operation unit 11, Measurement is performed on the communication device 1.

  The IQ data storage unit 21 stores IQ data that is a baseband signal. The sequence storage unit 22 stores the test sequence output from the sequence creation device 10a. The test execution unit 23 transmits the transmission frame including the baseband signal to the communication device 1 according to the test sequence stored in the sequence storage unit 22 and receives the RF signal generated by the communication device 1. Then, the communication device 1 is tested. For example, the test execution unit 23 analyzes input / output signals of the communication device 1 such as an RFIC control signal, a SysClk signal, and a SysClkEn signal. Further, the test execution unit 23 transmits the IQ data stored in the IQ data storage unit 21 to the communication device 1 as a baseband signal, and performs RFIC status information, IQ level, EVM (Error Vector Magnet), S / N. The quality of the RF signal transmitted by the communication device 1 such as ratio, BER (Bit Error Rate), and transient observation is analyzed.

  In other words, the test apparatus 20 operates as a pseudo BBIC that simulates the operation of the BBIC, and is connected to the communication device 1 with DigRF Ver. Communication and control according to the 4 communication I / F standard. At the same time, the test apparatus 20 operates as a pseudo base station that simulates the operation of the base station, and transmits and receives an RF signal according to the LTE communication standard to and from the communication device 1. Then, the communication device 1 is tested in these operations.

  Details of the sequence creation device 10a will be described using FIG. 1 with reference to FIGS. The sequence creation device 10a is characterized in that it determines in advance whether or not the data rate of the baseband signal transmitted in the transmission frame is within the sampling rate of the baseband signal received by the communication device 1. FIG. 2 is a first configuration example of a transmission frame. FIG. 3 is a second configuration example of the transmission frame. In the transmission frame 91 shown in FIG. 2, the data rate of the baseband signal transmitted in the transmission frame 91 is within the sampling rate of the communication device 1, but in the transmission frame 92 shown in FIG.

  Items necessary for executing the test sequence are input to the operation unit 11 shown in FIG. The operation unit 11 includes a pointing device for selecting buttons displayed on the screen of the time display unit 16a with a cursor, such as a number of keys, a dial and a keyboard that can be connected externally, or a mouse, not shown. The operation is detected by the sequence creation unit 12.

  Items necessary for execution of the test sequence are items necessary for calculation by the frame transmission time calculation unit 13a and the frame reception time calculation unit 14a, for example. For example, the data amount of the baseband signal included in the transmission frame transmitted by the test execution unit 23, the number of IQ data pairs (20 pairs) of the baseband signal placed on the payload 54b shown in FIG. It is a quantity (12 bits). Moreover, it is the sampling rate (30.72 MHz) of the baseband signal shown in FIG. This sampling rate is determined by, for example, a standard that the communication device 1 complies with, and is 30.72 MHz when the standard is LTE of 3.9th generation.

  The transmission data rate (1.248 Gbps) of the transmission frame 91 shown in FIG. 2, the data amount of the prepare 51 (40 bits), the data amount of the synchronization pattern 52 (50 bits), the data amount of the header 54a (8 bits), CRC (Cyclic Redundancy Check) ) 54c data amount (16 bits), SOF (Start Of Frame) 53 data amount (10 bits), and EOT (End Of Transmission) 55 data amount (10 bits) may also be input from the operation unit 11. Items that do not need to be changed, such as the data amount of the header 54a, the data amount of the CRC 54c, the data amount of the SOF 53, and the data amount of the EOT 55, are preferably stored in advance in the frame transmission time calculation unit 13a. In FIGS. 2 and 3, as an example, the transmission frames 91 and 92 have a single frame configuration. However, the present invention is not limited to this, and a multiframe configuration may be used.

  The sequence creation unit 12 shown in FIG. 1 detects items necessary for execution of the test sequence input to the operation unit 11 and describes and creates a test sequence for causing the test execution unit 23 to perform a specific test. .

  The frame transmission time calculation unit 13a illustrated in FIG. 1 acquires the data amount of the baseband signal included in the transmission frame transmitted by the test execution unit 23, and uses the acquired data amount to calculate the total data amount in the entire transmission frame. Using the total data amount and the transmission data rate of the transmission frame from the test execution unit 23, the time for the test execution unit 23 to transmit the transmission frame is calculated as the frame transmission time A shown in FIGS. Then, the calculated frame transmission time A is output to the time comparison unit 15a.

  The frame reception time calculation unit 14a illustrated in FIG. 1 acquires the data amount of the baseband signal included in the transmission frame transmitted by the test execution unit 23 and the sampling rate of the baseband signal received by the communication device 1 and acquires Using the data amount and the sampling rate, the time for the communication device 1 to receive the baseband signal is calculated as the frame reception time B shown in FIGS. Then, the calculated frame reception time B is output to the time comparison unit 15a.

  The time comparison unit 15a shown in FIG. 1 receives the frame transmission time (symbol A shown in FIGS. 2 and 3) and the frame reception time (FIGS. 2 and 3) from the frame transmission time calculation unit 13a and the frame reception time calculation unit 14a, respectively. The code B) shown in FIG. Then, the time comparison unit 15a determines whether or not the frame transmission time (symbol A shown in FIGS. 2 and 3) is within the frame reception time (symbol B shown in FIGS. 2 and 3).

  The time display unit 16a displays the determination result of the time comparison unit 15a. The time display unit 16a is a display (LCD, CRT) capable of displaying an image such as a waveform. The time display unit 16a can be externally connected in addition to the one integrally provided in the casing of the sequence creation device 10a. May be.

  Here, the time comparison unit 15a calculates the ratio between the frame transmission time (symbol A shown in FIGS. 2 and 3) and the frame reception time (symbol B shown in FIGS. 2 and 3), and the time display unit 16a It is preferable to display the ratio calculated by the time comparison unit 15a. At this time, it is preferable that the time display unit 16a displays the ratio calculated by the time comparison unit 15a in a graph.

  4A and 4B are display examples on the time display unit 16a. FIG. 4A shows the case of the first configuration example of the transmission frame, and FIG. 4B shows the case of the second configuration example of the transmission frame. In the case of the configuration of the transmission frame 91 shown in FIG. 2, when the frame transmission time A is divided by the frame reception time B, it becomes approximately 91%. In this case, 91% is displayed in a graph as shown in FIG. In the case of the configuration of the transmission frame 92 shown in FIG. 3, when the frame transmission time A is divided by the frame reception time B, it becomes approximately 108%. In this case, as shown in FIG. 4B, 108% is displayed in a graph. Thus, by displaying the ratio between the frame transmission time A and the frame reception time B in a graph, the user of the mobile communication device test system can check whether the transmission frame is within the sampling rate of the communication device 1 or not. Can be grasped intuitively.

  FIG. 5 is a flowchart showing an example of a mobile communication device testing method according to the present embodiment. The mobile communication device test method according to the present embodiment includes an acquisition procedure S101, a calculation procedure S102, a comparison procedure S103, a time display procedure S104, a sequence determination procedure S105, a sequence storage procedure S106, and a test execution procedure. S107 and sequence update procedure S111, and the communication device 1 is tested. In the time comparison procedure according to the present embodiment, a calculation procedure S102 and a comparison procedure S103 are executed.

  In the acquisition procedure S101, items necessary for execution of the test sequence are input to the operation unit 11. For example, a user of a mobile communication device test system inputs from a keyboard. Then, a test sequence is described by the sequence creation unit 12. Thereby, a temporary test sequence is created. Further, input to the operation unit 11 is not limited to user input. For example, the IQ data storage unit 21 acquires and stores a baseband signal included in the transmission frame transmitted in the test execution procedure S107 from the outside of the test apparatus 20. Then, the data amount of the baseband signal stored in the IQ data storage unit 21 is input to the operation unit 11. In addition, parameters used in each procedure such as the sampling rate used in the frame reception time calculation procedure S102b are set as necessary.

  In the calculation procedure S102, the frame transmission time calculation unit 13a executes the frame transmission time calculation procedure S102a, and the frame reception time calculation unit 14a executes the frame reception time calculation procedure S102b. In the frame transmission time calculation procedure S102a, the frame transmission time calculation unit 13a calculates the frame transmission time (symbol A shown in FIGS. 2 and 3). In the frame reception time calculation procedure S102b, the frame reception time calculation unit 14a calculates the frame reception time (reference B shown in FIGS. 2 and 3).

  In the comparison procedure S103, the time comparison unit 15a determines whether or not the frame transmission time A is within the frame reception time B. Thereby, it can be determined whether or not the transmission frame (reference numeral 91 shown in FIG. 2 and reference numeral 92 shown in FIG. 3) is within the sampling rate of the communication device 1.

  For example, when the frame transmission time A is within the frame reception time B as in the transmission frame 91 shown in FIG. 2, the communication device 1 generates an RF signal modulated by the baseband signal included in the transmission frame 91. can do. On the other hand, when the frame transmission time A is longer than the frame reception time B as in the transmission frame 92 shown in FIG. 3, the communication device 1 generates an RF signal modulated by the baseband signal included in the transmission frame 92. Can not do it.

  That is, the communication device 1 must receive necessary transmission data from the test apparatus 20 which is a pseudo BBIC in order to generate an RF signal to be transmitted to the base station according to the LTE communication standard. In the state shown in FIG. 2, the communication device 1 can receive necessary transmission data within a necessary time, and thus can generate an RF signal. However, in the state shown in FIG. 3, the communication device 1 cannot generate the RF signal because it cannot receive the necessary transmission data within the necessary time.

  In the comparison procedure S103, it is preferable that the time comparison unit 15a calculates the ratio between the frame transmission time A and the frame reception time B. Thereby, in time display procedure S104, the time display part 16a can display the ratio of the frame transmission time A and the frame reception time B with a graph.

  In the time display procedure S104, the time display unit 16a displays the determination result in the comparison procedure S103. Here, as shown in FIG. 4, the time display unit 16a preferably displays the ratio calculated by the time comparison unit 15a. In particular, in the time display procedure S104, it is preferable to display the ratio calculated in the comparison procedure S103 as a graph. Thereby, the user of the mobile communication device test system intuitively knows whether or not the transmission frame (reference numeral 91 shown in FIG. 2 and reference numeral 92 shown in FIG. 3) is within the sampling rate of the communication device 1. can do.

  In the sequence confirmation procedure S105, it is determined whether or not to confirm the test sequence. For example, the determination is performed by the user of the mobile communication device test system based on the determination result displayed on the time display unit 16a. The determination may be automatically performed based on the determination result in the comparison procedure S103. If the test sequence can be confirmed based on the determination result displayed on the time display unit 16a, the process proceeds to the sequence storage procedure S106. If the test sequence is not confirmed, the process proceeds to the sequence update procedure S111.

  For example, as shown in FIG. 4A, when the transmission frame is within the sampling rate of the communication device 1, it is determined to confirm the test sequence. As shown in FIG. 4B, when the transmission frame is outside the sampling rate of the communication device 1, it is determined that the test sequence is not fixed. When a transmission frame that is outside the sampling rate of the communication device 1 is transmitted, it may be determined that the test sequence is to be determined while remaining outside the sampling rate of the communication device 1.

  In the test of the communication device 1, it is necessary to verify not only the operation when the signal is normally received but also the operation at the time of abnormality. For this reason, transmitting a transmission frame that is outside the sampling rate is important in testing the communication device 1. When performing such a test, it is desirable that the user can know how much the transmission frame exceeds the sampling rate (or how much margin there is). In the mobile communication device test system 30a of the present embodiment, since the ratio is displayed as described above, the user can easily grasp the degree of excess or margin.

  In the sequence update procedure S111, the user of the mobile communication device test system operates the operation unit 11, changes the parameter setting value of the transmission frame, and updates the test sequence held by the sequence creation unit 12.

  FIG. 6 shows an example of the parameter setting value of the transmission frame. In the example shown in FIG. 2 and FIG. 3, it is performed in the high speed 1 × Primary mode. When the transmission frame is outside the sampling rate of the communication device as in the transmission frame 92 illustrated in FIG. 3, the user of the mobile communication device test system illustrated in FIG. 1 switches to, for example, the high-speed double primary mode. Thereby, the user of the mobile communication device test system can confirm whether or not the transmission frame from the test execution unit 23 is within the sampling rate of the communication device.

  In changing the parameter setting value of the transmission frame, the configuration of the transmission frame may be changed. For example, the multi mode is changed to the single mode, or the single mode is changed to the multi mode. 7A and 7B are configuration examples of transmission frames, where FIG. 7A shows a single frame configuration in the high-speed mode, FIG. 7B shows a multi-frame configuration in the high-speed mode, and FIG. 7C shows a single frame in the low-speed mode. The structure is shown, and (d) shows the multi-frame structure in the low-speed mode. When the frame transmission time is longer than the frame reception time in the transmission frame configuration shown in FIG. 7B, the frame transmission is performed by changing the transmission frame configuration to the single frame configuration shown in FIG. The time can be made shorter than the frame reception time. 7A, when the frame transmission time is sufficiently longer than the frame reception time, the transmission frame configuration is maintained while keeping the frame transmission time below the frame reception time. 7 (b) can be changed to the multi-frame configuration.

  Then, the procedure from the acquisition procedure S101 to the sequence determination procedure S105 is repeated, the test sequence is determined in the sequence determination procedure S105, and the process proceeds to the sequence storage procedure S106.

  In the sequence storage procedure S106, the sequence creation unit 12 outputs the test sequence determined in the sequence determination procedure S105 to the sequence storage unit 22. Then, the sequence storage unit 22 stores the test sequence. The IQ data storage unit 21 may acquire and store the baseband signal during the acquisition procedure S101, but may acquire and store the baseband signal at this time.

  In the test execution procedure S107, the test execution unit 23 transmits the transmission frame including the baseband signal to the communication device 1, receives the RF signal generated by the communication device 1, and receives the RF signal generated by the communication device 1. Run the test. For example, the test execution unit 23 controls the communication device 1 according to the test sequence, transmits IQ data to the communication device 1, and receives and analyzes the RF signal from the communication device 1. At this time, a test RF signal may be transmitted to the communication device 1 and a digital baseband signal from the communication device 1 may be received and analyzed.

  A calculation example of the frame transmission time A of the transmission frame 91 illustrated in FIG. 2 will be described. It is assumed that the data amount of the baseband signal included in the transmission frame 91 transmitted by the test execution unit (reference numeral 23 shown in FIG. 1) is 20 pairs of IQ data, and the data amount of IQ data is 12 bits. At this time, the data amount of the payload 54b is 20 × 12 × 2 = 480 bits. If the data amount of the header 54a is 8 bits and the data amount of the CRC 54c is 16 bits, the total data amount is 504 bits. When this is converted into 8 bits / 10 bits, the data amount is 630 bits. By adding the data amount of the prepare 51 (40 bits), the data amount of the synchronization pattern 52 (50 bits), and the data amount of the EOT (or EOF) 55 (10 bits), the total data amount (740 bits) in the entire transmission frame 91 is added. Can be calculated.

  When the transmission data rate of the transmission frame 91 transmitted from the test execution unit (reference numeral 23 shown in FIG. 1) is 1.248 Gbps, the time for the test execution part (reference numeral 23 shown in FIG. 1) to transmit the transmission frame 91 is 740 bits / 1.248 Gbps = 593.0 ns. Thereby, the frame transmission time A = 593.0 ns can be calculated.

  A calculation example of the frame reception time B in the transmission frame 91 illustrated in FIG. 2 will be described. The data amount of the baseband signal included in the transmission frame 91 transmitted from the test execution unit (reference numeral 23 shown in FIG. 1) is 20 pairs of IQ data, and is received by the communication device (reference numeral 1 shown in FIG. 1). Assume that the sampling rate of the band signal is 30.72 MHz. At this time, the time required for the communication device (reference numeral 1 shown in FIG. 1) to complete reception of one transmission frame 91 is 20 pairs / 30.72 MHz = 651.0 ns. Thereby, the frame reception time B = 651.0 ns can be calculated.

  A calculation example of the frame transmission time A in the transmission frame 92 illustrated in FIG. 3 will be described. It is assumed that the data amount of the baseband signal included in the transmission frame 92 transmitted by the test execution unit (reference numeral 23 shown in FIG. 1) is 10 pairs of IQ data, and the data amount of IQ data is 12 bits. At this time, the data amount of the payload 54b is 10 × 12 × 2 = 240 bits. If the data amount of the header 54a is 8 bits and the data amount of the CRC 54c is 16 bits, the total data amount is 264 bits. When this is converted into 8 bits / 10 bits, the data amount becomes 330 bits. When the data amount (40 bits) of the prepare 51, the data amount (50 bits) of the synchronization pattern 52, and the data amount (10 bits) of the EOT (or EOF) 55 are added to this, the total data amount (440 bits) in the entire transmission frame 92 is added. Can be calculated.

  When the transmission data rate of the transmission frame 92 transmitted by the test execution unit (reference numeral 23 shown in FIG. 1) is 1.248 Gbps, the time for the test execution part (reference numeral 23 shown in FIG. 1) to transmit the transmission frame 92 is 440 bits / 1.248 Gbps = 352.6 ns. Thereby, the frame transmission time A = 352.6 ns can be calculated.

  A calculation example of the frame reception time B in the transmission frame 92 illustrated in FIG. 3 will be described. The data amount of the baseband signal included in the transmission frame 92 transmitted by the test execution unit (reference numeral 23 shown in FIG. 1) is 10 pairs of IQ data, and is received by the communication device (reference numeral 1 shown in FIG. 1). Assume that the sampling rate of the band signal is 30.72 MHz. At this time, the time required for the communication device (reference numeral 1 shown in FIG. 1) to complete reception of one transmission frame 92 is 10 pairs / 30.72 MHz = 325.5 ns. Thereby, the frame reception time B = 325.5 ns can be calculated.

(Embodiment 2)
FIG. 8 is a schematic configuration diagram of a mobile communication device test system according to the present embodiment. The mobile communication device test system 30b according to the present embodiment includes a sequence creation device 10b instead of the sequence creation device 10a according to the first embodiment. The sequence creation device 10b replaces the frame transmission time calculation unit 13a, the frame reception time calculation unit 14a, the time comparison unit 15a, and the time display unit 16a included in the sequence creation device 10a with a transmission frame number calculation unit 13b and a reception frame number calculation. 14b, a frame number comparison unit 15b, and a frame number display unit 16b. Details of the transmission frame number calculation unit 13b, the reception frame number calculation unit 14b, the frame number comparison unit 15b, and the frame number display unit 16b will be described below with reference to FIGS. 2 and 3 and FIG.

  The transmission frame number calculation unit 13b illustrated in FIG. 8 calculates the transmission frame number A instead of the frame transmission time A described in the first embodiment. That is, the transmission frame number calculation unit 13b acquires the data amount of the baseband signal included in the transmission frame transmitted by the test execution unit 23, and calculates the total data amount in the entire transmission frame using the acquired data amount. Using the total data amount and the transmission data rate of the transmission frame from the test execution unit 23, the number of transmission frames per unit time at which the test execution unit 23 transmits the transmission frame is calculated as the transmission frame number A.

  For example, in the case of the transmission frame 91 shown in FIG. 2, the total data amount (740 bits) in the entire transmission frame 91 is calculated as in the first embodiment. Since the transmission data rate of the transmission frame 91 transmitted by the test execution unit (reference numeral 23 shown in FIG. 1) is 1.248 Gbps, the unit per unit time at which the test execution part (reference numeral 23 shown in FIG. 1) transmits the transmission frame 91. The number of transmission frames 91 is 1.248 Gbps / 740 bits = 1.687 M frames / s. Thereby, the number of transmission frames A = 1.687 M frames / s can be calculated.

  For example, in the case of the transmission frame 92 shown in FIG. 3, the total data amount (440 bits) in the entire transmission frame 92 is calculated as in the first embodiment. Since the transmission data rate of the transmission frame 92 transmitted by the test execution unit (reference numeral 23 shown in FIG. 1) is 1.248 Gbps, the test execution part (reference numeral 23 shown in FIG. 1) transmits a transmission frame 92 per unit time. The number of transmission frames 92 is 1.248 Gbps / 440 bits = 2.836 M frames / s. Thereby, the transmission frame number A = 2.8336 M frames / s can be calculated.

  The received frame number calculation unit 14b calculates the received frame number B instead of the frame reception time B described in the first embodiment. That is, the reception frame number calculation unit 14b acquires the data amount of the baseband signal included in the transmission frame transmitted by the test execution unit 23 and the sampling rate of the baseband signal received by the communication device 1, and the data amount and sampling rate are acquired. Using the rate, the number of transmission frames per unit time at which the communication device 1 receives the baseband signal is calculated as the number B of received frames.

  For example, in the case of the transmission frame 91 shown in FIG. 2, as in the first embodiment, the data amount of the baseband signal included in the transmission frame 91 transmitted by the test execution unit (reference numeral 23 shown in FIG. 1) is 20 pairs of IQ. It is assumed that the sampling rate of the baseband signal received by the communication device (reference numeral 1 shown in FIG. 1) is 30.72 MHz. At this time, the number of transmission frames 91 per unit time for which the communication device (reference numeral 1 shown in FIG. 1) must complete reception of the baseband signal included in one transmission frame 91 is 30.72 MHz / 20. Pair = 1.536 M frames / s. Thus, the number of received frames B = 1.536 M frames / s can be calculated.

  For example, in the case of the transmission frame 92 shown in FIG. 3, as in the first embodiment, the data amount of the baseband signal included in the transmission frame 92 transmitted by the test execution unit (reference numeral 23 shown in FIG. 1) is 10 pairs of IQ. It is assumed that the sampling rate of the baseband signal received by the communication device (reference numeral 1 shown in FIG. 1) is 30.72 MHz. At this time, the number of transmission frames 92 per unit time for which the communication device (symbol 1 shown in FIG. 1) must complete reception of the baseband signal included in one transmission frame 92 is 30.72 MHz / 10. Pair = 3.072M frames / s. As a result, the number of received frames B = 3.072 M frames / s can be calculated.

  The frame number comparison unit 15b determines whether or not the transmission frame number A is equal to or greater than the reception frame number B. The frame number display unit 16b displays the determination result of the frame number comparison unit 15b. Here, it is preferable that the frame number comparison unit 15b calculates the ratio between the transmission frame number A and the reception frame number B, and the frame number display unit 16b displays the ratio calculated by the frame number comparison unit 15b. At this time, the frame number display unit 16b preferably displays the ratio calculated by the frame number comparison unit 15b in a graph.

  In the frame number display section 16b, the display example shown in FIG. 4 is the ratio of the transmission frame number A and the reception frame number B. For example, in the case of the structure of the transmission frame shown in FIG. 2, when the number of received frames B is divided by the number of transmitted frames A, it is about 91%. In the case of the transmission frame configuration shown in FIG. 3, when the number of received frames B is divided by the number of transmitted frames A, it becomes approximately 108%. Thus, by displaying the ratio between the number of transmission frames A and the number of reception frames B in a graph, the user of the mobile communication device test system can check whether the transmission frames are within the sampling rate of the communication device 1 or not. Can be grasped intuitively.

  When the transmission frame number A is equal to or greater than the reception frame number B as in the transmission frame 91 illustrated in FIG. 2, the communication device 1 generates an RF signal modulated by the baseband signal included in the transmission frame 91. Can do. On the other hand, when the transmission frame number A is less than the reception frame number B as in the transmission frame 92 shown in FIG. 3, the communication device 1 generates an RF signal modulated by the baseband signal included in the transmission frame 92. Can not do it.

  FIG. 9 is a flowchart showing an example of a mobile communication device test method according to the present embodiment. The mobile communication device testing method according to the present embodiment includes a frame number comparison procedure instead of the time comparison procedure described in the first embodiment, and includes a frame number display procedure S114 instead of the time display procedure S104. In the frame number comparison procedure, calculation procedure S112 and comparison procedure S113 are executed.

  In the calculation procedure S112, the transmission frame number calculation unit 13b executes the transmission frame number calculation procedure S112a, and the reception frame number calculation unit 14b executes the reception frame number calculation procedure S112b. In the transmission frame number calculation procedure S112a, the transmission frame number calculation unit 13b calculates the number of transmission frames (symbol A shown in FIGS. 2 and 3). In the received frame number calculation step S112b, the received frame number calculation unit 14b calculates the number of received frames (symbol B shown in FIGS. 2 and 3).

  In the comparison procedure S113, the frame number comparison unit 15b determines whether or not the number of transmission frames (reference A shown in FIGS. 2 and 3) is equal to or greater than the number of received frames (reference B shown in FIGS. 2 and 3). . Thereby, it can be determined whether the transmission frame is within the sampling rate of the communication device 1.

  For example, when the transmission frame number A is equal to or larger than the reception frame number B as in the transmission frame 91 shown in FIG. 2, the communication device 1 generates an RF signal modulated by the baseband signal included in the transmission frame 91. can do. On the other hand, when the transmission frame number A is equal to or greater than the reception frame number B as in the transmission frame 92 shown in FIG. 3, the communication device 1 generates an RF signal modulated by the baseband signal included in the transmission frame 92. Can not do it.

  In the frame number display procedure S114, the frame number display unit 16b displays the determination result in the comparison procedure S113. Here, the frame number display unit 16b preferably displays the ratio calculated by the frame number comparison unit 15b as shown in FIG. In particular, in the frame number display procedure S114, the ratio calculated in the comparison procedure S113 is preferably displayed in a graph. Thereby, the user of the mobile communication device test system can intuitively know whether or not the transmission frame is within the sampling rate of the communication device 1.

  The present invention can be applied to the information and telecommunications industry because it can perform a test of an RFIC conforming to LTE.

1: communication device 10a, 10b: sequence creation device 11: operation unit 12: sequence creation unit 13a: frame transmission time calculation unit 13b: transmission frame number time calculation unit 14a: frame reception time calculation unit 14b: reception frame number time calculation Unit 15a: Time comparison unit 15b: Frame number comparison unit 16a: Time display unit 16b: Frame number display unit 20: Test device 21: IQ data storage unit 22: Sequence storage unit 23: Test execution unit 30a, 30b: Mobile communication Device test system 51: Prepare 52: Synchronization pattern 53: SOF
54a: Header 54b: Payload 54c: CRC
55: EOT
91, 92: transmission frame

Claims (12)

Mobile communication device test for testing a communication device (1) used in a mobile communication device that transmits and receives an RF (Radio Frequency) signal to and from a base station and that generates an RF signal modulated with a baseband signal A system (30a),
A test execution unit (23) that transmits a transmission frame including the baseband signal to the communication device, receives an RF signal generated by the communication device, and executes a test of the communication device; ,
Obtaining the data amount of the baseband signal included in the transmission frame transmitted by the test execution unit, calculating a total data amount in the entire transmission frame using the data amount, and calculating the total data amount and the test A frame transmission time calculation unit (13a) for calculating, as a frame transmission time, a time at which the test execution unit transmits the transmission frame using a transmission data rate of the transmission frame from the execution unit;
Obtaining the data amount of the baseband signal included in the transmission frame transmitted by the test execution unit and the sampling rate of the baseband signal received by the communication device, using the data amount and the sampling rate, A frame reception time calculation unit (14a) that calculates, as a frame reception time, a time per transmission frame at which the communication device receives the baseband signal;
A mobile communication device test system, comprising: a time comparison unit (15a) for determining whether or not the frame transmission time is within the frame reception time. A time display unit (16a) for displaying the determination result of the time comparison unit;
The time comparison unit calculates a ratio between the frame transmission time and the frame reception time;
2. The device test system for mobile communication according to claim 1, wherein the time display unit displays the ratio calculated by the time comparison unit.   3. The mobile communication device test system according to claim 2, wherein the time display unit displays the ratio calculated by the time comparison unit in a graph. Mobile communication device test for testing a communication device (1) used in a mobile communication device that transmits and receives an RF (Radio Frequency) signal to and from a base station and that generates an RF signal modulated with a baseband signal A system (30b),
A test execution unit (23) that transmits a transmission frame including the baseband signal to the communication device, receives an RF signal generated by the communication device, and executes a test of the communication device; ,
Obtaining the data amount of the baseband signal included in the transmission frame transmitted by the test execution unit, calculating a total data amount in the entire transmission frame using the data amount, and calculating the total data amount and the test Using the transmission data rate of the transmission frame from the execution unit, the test execution unit calculates the number of transmission frames per unit time for transmitting the transmission frame as the number of transmission frames (13b). When,
Obtaining the data amount of the baseband signal included in the transmission frame transmitted by the test execution unit and the sampling rate of the baseband signal received by the communication device, using the data amount and the sampling rate, A reception frame number calculation unit (14b) that calculates the number of transmission frames per unit time at which the communication device receives the baseband signal as the number of reception frames;
A device test system for mobile communication, comprising: a frame number comparison unit (15b) for determining whether or not the number of transmission frames is equal to or greater than the number of reception frames. A frame number display unit (16b) for displaying a determination result of the frame number comparison unit;
The frame number comparison unit calculates a ratio between the number of transmission frames and the number of reception frames,
5. The mobile communication device test system according to claim 4, wherein the frame number display unit displays the ratio calculated by the frame number comparison unit.   6. The device test system for mobile communication according to claim 5, wherein the frame number display unit displays the ratio calculated by the frame number comparison unit in a graph. Mobile communication device test for testing a communication device (1) used in a mobile communication device that transmits and receives an RF (Radio Frequency) signal to and from a base station and that generates an RF signal modulated with a baseband signal A method,
A test execution procedure (S107) for transmitting a transmission frame including the baseband signal to the communication device, receiving an RF signal generated by the communication device, and executing a test of the communication device; ,
Before the test execution procedure,
A data amount of the baseband signal included in the transmission frame transmitted in the test execution procedure is acquired, and a total data amount in the entire transmission frame is calculated using the data amount, and the total data amount and the test Using the transmission data rate of the transmission frame in the execution procedure, calculating the time for transmitting the transmission frame in the test execution procedure as a frame transmission time,
Obtaining the data amount of the baseband signal included in the transmission frame transmitted in the test execution procedure and the sampling rate of the baseband signal received by the communication device, using the data amount and the sampling rate, Calculating the time per transmission frame for the communication device to receive the baseband signal as a frame reception time;
And a time comparison procedure (S102, S103) for determining whether or not the frame transmission time is within the frame reception time. A time display procedure (S104) for displaying the determination result in the time comparison procedure is further provided after the time comparison procedure,
In the time comparison procedure, a ratio between the frame transmission time and the frame reception time is calculated,
8. The mobile communication device testing method according to claim 7, wherein in the time display procedure, the ratio calculated in the time comparison procedure is displayed.   9. The mobile communication device testing method according to claim 8, wherein, in the time display procedure, the ratio calculated in the time comparison procedure is displayed in a graph. Mobile communication device test for testing a communication device (1) used in a mobile communication device that transmits and receives an RF (Radio Frequency) signal to and from a base station and that generates an RF signal modulated with a baseband signal A method,
A test execution procedure (S107) for transmitting a transmission frame including the baseband signal to the communication device, receiving an RF signal generated by the communication device, and executing a test of the communication device; ,
Before the test execution procedure,
A data amount of the baseband signal included in the transmission frame transmitted in the test execution procedure is acquired, and a total data amount in the entire transmission frame is calculated using the data amount, and the total data amount and the test Using the transmission data rate of the transmission frame in the execution procedure, calculating the number of transmission frames per unit time for transmitting the transmission frame in the test execution procedure as the number of transmission frames,
Obtaining the data amount of the baseband signal included in the transmission frame transmitted in the test execution procedure and the sampling rate of the baseband signal received by the communication device, using the data amount and the sampling rate, The number of transmission frames per unit time at which the communication device receives the baseband signal is calculated as the number of received frames,
And a frame number comparison procedure (S112, S113) for determining whether or not the number of transmitted frames is equal to or greater than the number of received frames. A frame number display procedure (S114) for displaying a determination result in the frame number comparison procedure after the frame number comparison procedure;
In the frame number comparison procedure, a ratio between the number of transmission frames and the number of reception frames is calculated;
11. The mobile communication device testing method according to claim 10, wherein in the frame number display procedure, the ratio calculated in the frame number comparison procedure is displayed.   12. The mobile communication device testing method according to claim 11, wherein, in the frame number display procedure, the ratio calculated in the frame number comparison procedure is displayed in a graph.

Images