JPH11186973A - Radio terminal test equipment and radio wave environment test equipment for radio terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio terminal test equipment that conducts a test with high reproducibility in the operation test including a communication protocol where an actual specific radio environment and changes in the radio environment are simulated. SOLUTION: This test equipment is provided with a base station 1 that generates a base station signal in a simulating way, a phase shifter 2 that changes a phase of the base station signal, a transmission gain controller 3 that changes amplitude of the base station signal, a control information storage section 5 that stores the timing fluctuation information of amplitude and phase of a radio signal received at a radio terminal or calculated in advance, and a control section 4 that controls the phase shifter 2 and the transmission gain controller 3, based on the timing fluctuation information of the phase and the amplitude stored in the control information storage section 5. Thus, a radio terminal test equipment is realized, where fading state similar to an actual radio environment is produced at an output terminal of the transmission gain controller 3 by controlling the phase and the amplitude, based on the timing fluctuation information of the stored phase and amplitude.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio terminal test apparatus used for testing a radio communication terminal. In particular, the present invention relates to a radio terminal test apparatus improved in technology for setting and controlling a test radio environment, and a radio terminal radio environment test apparatus for testing a radio terminal using the radio terminal test apparatus.

[0002]

2. Description of the Related Art FIG.
It is a figure which shows the conventional test apparatus for radio | wireless terminals shown by the 997 general meeting proceedings collection B-1-6 "The construction method of the field simulator for portable radio | wireless terminal evaluation." In FIG.
401, a signaling tester that simulates a base station;
Is a measurement box, 409 is a radio wave absorber mounted on one side inside 408, 402 is connected to the signaling tester 401, a distributor for distributing an output signal from the signaling tester 401, 403 is connected to the distributor 402, Phase shifter 4 for changing the phase of the signal output from splitter 402, 4
06 is an amplifier for amplifying the output signal from the phase shifter 403;
407 is an amplifier connected to 406 and transmits a signal amplified by the width shifter 406, and 405 is a phase shifter 4
A D / A converter 404 for generating a signal for switching the switching circuit 03 is connected to a phase shifter 40 for the D / A converter 405.
A personal computer 41 that supplies a timing signal for D / A conversion of the signal 3 and digital data to the signaling tester 401 to control the operation of the signaling tester 401;
Reference numeral 0 denotes a wireless terminal serving as a test object installed in the measurement box 408, and reference numeral 411 denotes a receiving antenna 411 for receiving a wireless signal output from the slave unit 410. In the figure, a solid line indicates a signal flow, and a broken line indicates a control signal flow.

[0005] Next, the operation of the conventional wireless terminal test apparatus will be described. The output signal of the signaling tester 401, which is a single-frequency transmission signal source, is distributed to a plurality of signals by a distributor 402. The phase of the output of each phase shifter 403 is changed by the signal output by the D / A converter 405 based on a different random number generated by the personal computer 404 for each signal. Change randomly. After amplifying each signal in each amplifier 406, the amplified signal is transmitted from each transmitting antenna 407, and fading is generated by actually causing a radio wave to interfere in the measurement box 408. By mounting the radio wave absorber 409 on the surface of the measurement box 408 facing the transmission antenna 407, the difference from the actual environment is reduced. That is, in the narrow space, the reflected wave is not easily attenuated, so that the radio wave absorber 409 is provided to attenuate the radio wave to create the same environment as the actual environment. The distribution characteristic of the fading generated by the wireless terminal test apparatus is determined by the position in the measurement box 408.
Note that fading follows a Rayleigh distribution at a certain position in the measurement box 408 and a Rice distribution at another position.

FIG. 18 shows a circuit configuration of a general fading simulator described in Japanese Patent Application Laid-Open No. Hei 6-132865 as a prior art. A fading simulator is a device that simulates fading and fluctuations in received radio waves due to multipath by setting a moving speed. In FIG. 18, 412 is an input terminal, 413
Is a divider for dividing the input signal into two systems, 417 and 418 are Gaussian noise generating circuits, 414 is a 90-degree phase shifter, 415 is a signal generated by the Gaussian noise generating circuit 417 and the distributor 4
The multiplier 416 multiplies the signal from the signal 13 by the signal from the Gaussian noise generator 418 and the 90-degree phase shifter 41.
419 is a multiplier for multiplying the signal from the multiplier 4 by
A synthesizer for synthesizing the two systems of signals from 5 and 416;
420, an amplifier for amplifying the signal synthesized by the synthesizer 419; 421, a delay time generating circuit; 422, an amplifier;
3 is an output terminal.

Next, the operation of the fading simulator circuit shown in FIG. 18 will be described. Input terminal 412
Are distributed to two systems by a distributor 413. One of the divided signals is shifted to a phase orthogonal to the other signal by a 90-degree phase shifter 414 connected to a distributor 413, and a Gaussian noise is generated in a multiplier 416 connected to the 90-degree phase shifter 414. Multiplied by the random noise generated by the circuit 418 to provide a random amplitude. The other signal is supplied to the multiplier 4 connected to the divider 413.
At 15, the signal is multiplied by the random noise generated by the Gaussian noise generation circuit 417 to give a random amplitude. A signal having a random phase and a random amplitude is synthesized by combining two signals having random amplitudes having no correlation with each other and having orthogonal phases, by a combiner 419 connected to the multipliers 415 and 416. It is generated from the synthesizer 419. This random signal is amplified by the amplifier 420 connected to the synthesizer 419, and then given a delay time by the delay time generation circuit 421 connected to the amplifier 420, and further by the amplifier 422 connected to the delay time generation circuit 421. The signal is amplified and output to the output terminal 423. This output signal was radiated from the transmission antenna provided in the measurement box 408 shown in FIG.

[0006]

The conventional test apparatus for wireless terminals only has to simulate a statistical fading distribution, and has a drawback that it cannot faithfully simulate fading in a specific environment. This is because the state that can be simulated is limited by the characteristics of the measurement box. Further, even when it is desired to perform a test under a statistical fading distribution, it is necessary to strictly control the position of the slave unit to be tested.
Furthermore, it has not been possible to simulate an environment where radio waves from many base stations arrive as in a real field.

On the other hand, even in a general fading simulator, the signal that can be simulated is a statistical fading distribution, and the statistical behavior of fading depending on the moving speed of the radio terminal can be tested.

The present invention has been made to solve the above problems, and can simulate an actual specific environment and a change in the environment, and can be reproduced in an operation test including a communication protocol. It is an object of the present invention to provide a wireless terminal test apparatus capable of performing a highly reliable test.

[0009]

According to a first aspect of the present invention, there is provided a test apparatus for a radio terminal, comprising: a base station section for generating a base station signal in a pseudo manner; phase shifting means for changing a phase of the base station signal; Transmission gain control means for changing the amplitude of the radio signal, control information storage means for storing temporal variation information of the phase and amplitude of the radio signal received or calculated in advance by the radio terminal, and control information storage means A phase shift unit and a control unit that controls the transmission gain control unit based on the temporal fluctuation information of the phase and the amplitude, and a base station based on the temporal fluctuation information of the phase and the amplitude stored in the control information storage unit. It is configured to create a fading condition at the output terminal of the transmission gain controller by controlling the phase and amplitude of the station signal.

According to a second aspect of the present invention, there is provided a test apparatus for a radio terminal, comprising: first separating means for separating an uplink and a downlink at an input / output terminal of a base station unit; And second separating means for separating.

According to a third aspect of the present invention, a test apparatus for a wireless terminal includes a reception gain control unit for amplifying a signal from the wireless terminal and sending the amplified signal to a base station unit. Placed between the control means, outputs a transmission signal from the base station section to the phase shift means, inputs a reception signal from the reception gain control means to the base station section, and the second separation means includes a wireless terminal, a reception gain control means, It is placed between the transmission gain control means, outputs the transmission signal from the transmission gain control means to the wireless terminal, inputs the reception signal from the wireless terminal to the reception gain control means, and the control means is stored in the control information storage means. The phase shift means, the transmission gain control means, and the reception gain control means are controlled based on the information.

According to a fourth aspect of the present invention, a wireless terminal test apparatus includes a plurality of sets of a base station unit, a first separating unit, a reception gain control unit, a phase shift unit, and a gain control unit. Signal distribution means for distributing to each reception gain control unit
Between the separation means and the plurality of reception gain control units,
Mixing means for mixing the transmission signals from each transmission gain control means and outputting to the second separation means is provided between each transmission gain control means and the second separation means.

According to a fifth aspect of the present invention, a test apparatus for a wireless terminal uses a TDMA system as a wireless communication system, and stores phase and amplitude information in units of slots as time and phase variation information stored in a control information storage means. And the phase and amplitude are changed in slot units.

In a sixth aspect of the present invention, the base station unit has a base station signal transmitting / receiving terminal for transmitting / receiving a base station signal, and a plurality of delay signal output terminals for transmitting a delayed base station signal. A plurality of delay signal output terminals are connected to phase shift means for shifting the delay signal, and the phase shift means are connected to transmission gain control means for amplifying the delay signal,
Further, a mixing means for mixing the transmission signals from each transmission gain control means and outputting the mixed signal to the second separation means is provided between each transmission gain control means and the second separation means.

According to a seventh aspect of the present invention, in the test apparatus for a wireless terminal, the plurality of base station units are constituted by a plurality of synchronous base station units for generating a signal of the base station in a pseudo manner based on the synchronization timing signal. A synchronization timing signal generation unit for generating a synchronization timing signal for controlling the base station unit, wherein the control information storage unit controls the plurality of phase shift units and the plurality of gain control units, and controls the synchronization timing signal generation unit. It is composed of

The test apparatus for a wireless terminal according to an eighth aspect of the present invention further includes a pattern generating means for generating background base station signal data, and a modulating means for modulating the generated background base station signal data. A background base station signal generating means for generating a background base station signal based on a synchronization timing signal generated by the signal generating unit; and a phase shifter for changing a phase of the background base station signal to an output terminal of the background base station signal generating unit. And means for connecting the transmission gain control means for changing the amplitude of the background base station signal to the phase shift means.

The test apparatus for a wireless terminal according to a ninth aspect further includes one or more noise generating means for generating noise, and one or more gain control means for changing the amplitude of the noise signal generated by the noise generating means. Means.

According to a tenth aspect of the present invention, a wireless terminal test apparatus is configured to change the synchronization of transmission / reception timing in synchronization with a synchronization timing signal from outside the wireless terminal test apparatus.

According to an eleventh aspect of the present invention, in addition to the radio terminal test apparatus, an antenna for connecting the radio terminal to be tested and the second separation means, It is configured to have an anechoic chamber for installing the terminal and the antenna inside.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a block diagram illustrating a configuration of a wireless terminal test apparatus according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes a base station unit for generating a base station signal in a pseudo manner, 2 denotes a phase shifter connected to the base station unit 1, and shifts the phase of a base station signal output from the base station unit 1; A transmission gain controller connected to the phase shifter for changing the amplitude of the output waveform from the phase shifter;
A control unit for controlling the phase shifter 2 and the transmission gain controller 3;
Reference numeral 5 denotes a control information storage unit that stores control data received or pre-calculated by the wireless terminal for use by the control unit 4 to control the phase shifter 2 and the transmission gain controller 3, and 21 denotes a reception gain controller. The output terminal 3 and the slave terminal 6 to be tested are connected to the output terminal 21. In the figure, a solid line indicates a signal flow, and a broken line indicates a control flow.

Next, the operation of the wireless terminal test apparatus according to the first embodiment will be described. The phase and amplitude data stored in the control information storage unit 5 are information actually measured by delay profile measurement and reception level measurement in an actual field, or information calculated by using a ray tracing method by a computer. . This information is derived from the values obtained by calculating the phase and amplitude at the reception position of the signal from the base station at arbitrary coordinates and time based on various information that affects radio wave propagation such as buildings and roads in urban areas. Become
This corresponds to a time variation at a stationary point, a case of moving on an arbitrary moving route at an arbitrary speed, and the like. The control section 4 starts and stops transmission of base station signals from the base station section 1 and performs sequence control. The control unit 4 controls the phase shifter 2 and the transmission gain controller 3 using the phase and amplitude data stored in the control data storage unit 5, and controls the phase of the signal output to the slave unit 6. By changing the amplitude and the amplitude, an arbitrary radio wave environment such as fading is simulated.

FIG. 2 shows a control process of the phase and the amplitude of the base station signal (test signal) output from the radio terminal test apparatus according to the first embodiment of the present invention on a time axis. FIG.
In, the horizontal direction is a time axis, and time elapses from left to right. FIG. 2A shows amplitude information for controlling the transmission gain controller 3, and FIG. 2B shows phase information for controlling the phase shifter 2. These signals are both stored in the control information storage unit 5, are read by the control unit 4, and are signals for controlling the phase shifter 2 and the transmission gain controller 3, respectively. FIG. 2C shows the phase of the test signal at the output terminal 21 at regular intervals when the wireless terminal test apparatus of the present invention is controlled based on the values of FIGS. 2A and 2B. Represents the amplitude. The length of the arrow indicates the amplitude, and the rotation angle from the y-axis indicates the phase. As shown in FIG. 2C, the phase shifter 2 and the transmission gain controller 3 are controlled based on the information stored in the control information storage unit 5, and the output terminal 21 connected to the transmission gain controller 3 is controlled. It can be seen from FIG. 7 that a test signal having an arbitrary phase and amplitude is output.

As described above, the test apparatus for a wireless terminal according to the first embodiment has a configuration capable of outputting a signal in an arbitrary state. In particular, by changing the phase and the amplitude based on the information stored in the control information storage unit 5, the same signal as the signal obtained by combining the signals emitted from the base station and passing through different paths under a certain environment is used as a slave. Since the signal can be simulated as received by the device 6, the same signal as the test signal under the actual environment can be received, so that a test with high reproducibility can be performed.

Embodiment 2 FIG. In the first embodiment described above,
The second embodiment simulates a base station transmission signal.
Is characterized in that the base station unit 1 further has a receiving function and a communication procedure, and can simulate a test environment close to an actual field test.

FIG. 3 is a block diagram showing a configuration of a wireless terminal test apparatus according to Embodiment 2 of the present invention. In FIG. 3, reference numeral 7 denotes a circulator which is connected to the base station unit 1 and separates bidirectional signals into uplink and downlink, 8 denotes a circulator which is connected to the slave unit 6 and separates bidirectional signals into uplink and downlink, and 9 denotes a circulator. A reception gain controller for changing the amplitude of the signal from the slave unit 6 separated by the circulator 8, and 21 is an output terminal of the second separator 8. In FIG. 3, the same reference numerals as those in FIG. 1 indicate the same components or components having the same functions, and thus description thereof will be omitted. In addition, description of the same parts as those in the first embodiment will be omitted.

Next, the operation of the wireless terminal test apparatus according to the second embodiment will be described. The transmission (downlink) signal output from the base station unit 1 reaches the slave unit 6 via the circulator 7, the phase shifter 2, the transmission gain controller 3, the circulator 8, and the output terminal 21. The route of the transmission signal is the same as the route of the first embodiment except that the route passes through the circulator. on the other hand,
The received (up) signal output from the handset 6 is separated by the circulator 8 without going to the transmission gain controller 3 and sent to the reception gain controller 9. In the reception gain controller 9, the amplitude of the uplink signal is adjusted under the control of the control unit 4, and is input to the base station unit 1 via the circulator 7.

As described above, by receiving the signal from the slave unit 6, the base station unit 1 can simulate the same operation as the test actually performed by the base station in the field. Therefore, not only a reception test of the wireless terminal but also a test that requires the operation of a communication procedure such as an outgoing / incoming call and a call test can be performed in an environment equivalent to a real field, and a test with good reproducibility can be performed. .

Embodiment 3 In the second embodiment described above,
It simulates the radio wave environment of one base station,
Embodiment 3 is characterized in that a radio wave environment by a plurality of base stations is simulated.

FIG. 4 is a block diagram showing a configuration of a wireless terminal test apparatus according to Embodiment 3 of the present invention. In FIG. 4, reference numeral 10 denotes a mixer for mixing a plurality of downstream signals, and 11 denotes a distributor for dividing the upstream signal output from the slave unit 6 and separated by the circulator 8 into a plurality of systems. The wireless terminal test apparatus according to the third embodiment includes a plurality of sets of the base station unit 1, the circulator 7, the phase shifter 2, the transmission gain controller 3, and the reception gain controller 9. In FIG. 4, the same reference numerals as those in FIGS. 1 to 3 indicate the same components or components having the same functions, and thus description thereof will be omitted. Further, in the following description, description of the same parts as those of the first and second embodiments will be omitted.

Next, the operation of the wireless terminal test apparatus according to the third embodiment will be described. The data of the phase and the amplitude of the test signal are stored in the control information storage unit 5 corresponding to each of the plurality of base stations 1. With reference to these pieces of information, the control unit 4 controls the phase shifter 2 and the transmission gain controller 3 so as to simulate a different radio wave environment for each base station. And arrives at the slave unit 6 to be tested via the circulator 8.
An output signal such as a response from the slave unit 6 is sent to the distributor 11 by the circulator 8 and distributed to a number of reception (uplink) signals corresponding to the number of the base stations 1, and each of the distributed reception (uplink) signals is Gain controller 9 controlled by each controller 4
, The signal amplitude is adjusted, and the circulator 7
To the base station unit 1 via.

Since each base station unit 1 can independently execute a communication procedure with the slave unit 6, for example, a handover for switching a base station of a communication partner, a failure in establishing a wireless channel with the base station, or another base station in the case of rejection. A test requiring a plurality of base stations, such as a retry operation to a station, can be performed with good reproducibility under the same environment as in a real field.

Embodiment 4 FIG. In the fourth embodiment, the phase and amplitude of a signal are controlled on a transmission slot basis by using the TDMA system as the wireless communication system using the wireless terminal test apparatus according to the first to third embodiments. It is characterized by. FIG. 5 is a diagram expressing a phase and amplitude control process of the test apparatus for a wireless terminal according to the fourth embodiment of the present invention on a time axis. In the following description, as an example, a test using a TDMA test signal in the wireless terminal test apparatus shown in FIG. 1 will be described.

FIG. 5A shows the base station unit 1 in the TDMA system.
Of the transmission slot is represented by a solid color.
FIG. 5B is an example of a gain control amount in which the control unit 4 controls the transmission gain controller 3 based on the information stored in the control information storage unit 5. FIG. 5C shows a phase control value at which the control unit 4 controls the phase shifter 2 based on the information stored in the control information storage unit 5. The base station unit 1 generates and transmits a transmission signal only during the transmission slot timing period shown in FIG.
Therefore, by controlling the phase and the amplitude only when the transmission slot timing occurs, the control value of the phase shifter 2 and the control amount of the transmission gain controller 3 are reduced during the period during which no transmission signal exists between the transmission slot timings. The configurations of the phase shifter 2 and the transmission gain controller 3 can be simplified.

As described above, by controlling the phase and the amplitude only at the time of the transmission slot timing, the response performance of the phase shifter 2 and the transmission gain controller 3 can be reduced, and the switching speed can be reduced. Thus, the amount of information to be stored can be greatly reduced.

Embodiment 5 FIG. FIG. 6 is a block diagram showing a detailed configuration of a wireless terminal test apparatus according to Embodiment 5 of the present invention. In FIG. 6, reference numeral 20 denotes a base station unit with a delay output, which outputs a base station signal and a plurality of delay base station signals. In FIG. 6, the same reference numerals as those in FIGS. 1 to 5 indicate the same components or components having the same functions, and thus description thereof will be omitted. In the following description, the description of the same parts as those in the first to third embodiments will be omitted.

In FIG. 6, the base station unit 20 with delay output
Outputs a plurality of delayed base station signals delayed by a predetermined amount based on the delay amount information stored in the control information storage unit 5 in addition to the input / output terminal simulating the base station. Each delay output output from the base station unit 20 with delay output is individually controlled in amplitude and phase via a phase shifter 2 and a transmission gain controller 3 and then mixed by a mixer 10 to form a circulator. 8 to the slave unit 6.

In general, a small delay can be reproduced by controlling the phase of a carrier wave. However, it is generally assumed that the error rate is degraded by QPSK modulation.
If there is a delay close to or exceeding%, it cannot be reproduced only by phase control. In order to deal with such a case, in the fifth embodiment, by providing a base station unit with a delay output as shown in FIG. 6, signals having different propagation delay times passing through a plurality of paths are combined, or By switching, an arbitrary multipath radio wave environment can be simulated in a laboratory with good reproducibility.

Embodiment 6 FIG. Embodiment 6 is characterized in that a radio wave environment including relative operation timings of a plurality of base stations is simulated. FIG. 7 is a block diagram showing a configuration of a wireless terminal test apparatus according to Embodiment 6 of the present invention. In FIG. 7, reference numeral 12 denotes a synchronous base station unit having a function of synchronizing transmission / reception timings with an external synchronous timing signal, and reference numeral 13 denotes a synchronous timing signal generator for generating a synchronous timing signal for controlling the timing of the synchronous base station unit 12. Department. Synchronous timing signal generator 13
Generates a synchronization timing signal that defines the operation timing of each synchronous base station unit 12 under the control of the control unit 4, controls the relative operation timing of each synchronous base station unit 12, and responds to the actual environment. Operation timing can be realized.

As an example of the configuration of the synchronous base station section 12, PH
The case of S will be described as an example. The communication system of PHS is T
DMA (Time Division Multiple Access) / TDD (T
imeDivision Duplex), in which eight slots are multiplexed in one frame, and four consecutive slots are assigned to each of the uplink and downlink. Further, the control signal transmitted by the base station is broadcast every n frames (n is a value determined by the system) so that each base station can transmit the control signal on the same frequency. The control information broadcast by each base station is repeated in a certain unit, and this unit is called a superframe. Now, the synchronous base station unit 12 that simulates the PHS base station receives a start timing of a slot, a start timing of a frame, or a start timing of a superframe from the outside.
Or, by giving them in combination, the synchronization between signals input and output from the synchronous base station unit 12 is controlled.

The relative operation timing of each synchronous base station unit 12 is controlled based on a synchronous timing signal supplied from outside the radio terminal test apparatus without providing the synchronous timing signal generation unit 13. Operation timing corresponding to a real environment can be realized.

Thus, for example, in an environment where transmission signals of two base stations are transmitted in adjacent slots, the synchronization of the two base stations is shifted, and the transmission timing is gradually shifted. It is possible to realize an environment where a collision occurs. In addition, the same base station is simulated by the two synchronous base station units 12, the operation timing is set, the transmission gain controller 3 is controlled so that only one of the base stations can receive, and then the transmission gain controller 3 is controlled and the other is controlled. By changing to a state in which only the handset can be received, it is possible to simulate a large variation in the radio wave arrival path due to the case where the slave unit 6 moves.

Embodiment 7 In Embodiment 6 described above,
In order to simulate a plurality of base stations, a synchronous base station unit 12, a phase shifter 2, a transmission gain controller 3 and the like for the number of base stations are required. The station is characterized in that a path for receiving a reception signal is omitted and a plurality of transmission signals can be transmitted collectively.

FIG. 8 is a block diagram showing a configuration of a wireless terminal test apparatus according to Embodiment 7 of the present invention. In FIG. 8, reference numeral 14 denotes a background base station signal generation unit that simulates transmission signals of a plurality of base stations, reference numeral 15 denotes a pattern generator that generates data transmitted by the background base station, and reference numeral 16 modulates data generated by the pattern generator 15. Modulator. In FIG.
Since the same reference numerals as those in FIGS. 1 to 7 indicate the same components or components having the same functions, their description will be omitted. In the following description, Embodiments 1 to
Description of the same parts as in the sixth embodiment will be omitted.

The radio terminal test apparatus of the seventh embodiment is characterized in that a background base station signal generator 14 is added to the radio terminal test apparatus of the sixth embodiment shown in FIG. Here, that no communication procedure occurs means that the base station does not receive an uplink signal. Therefore, in the test apparatus for wireless terminals, it is not necessary to provide the phase shifters 2 and the transmission gain controllers 3 for the number of base stations. In the background base station signal generation unit 14, a plurality of transmission signals are collectively generated by a pattern generator 15, and those signals are modulated by a modulator 16,
The signal is transmitted through a pair of phase shifters 2 and a transmission gain controller 3.
The control unit 4 controls each phase shifter 2 and each transmission gain controller 3 at a timing corresponding to each base station, and the background base station signal generated by the background base station signal generation unit 14 As a result, the signals are mixed with signals from a plurality of synchronous base stations 12 simulating a base station in which a communication procedure actually occurs, and reach the slave 6.

As described above, in the radio terminal test apparatus according to the seventh embodiment, the background base station signal generator 14 generates a desired number of base station signals collectively.
It is possible to simulate a real radio wave environment with a small-scale device and a combination of appropriate signals.

Embodiment 8 FIG. In Embodiment 7 described above,
Although a plurality of base stations are simulated, Embodiment 8 is characterized in that a noise signal in a real field environment is further simulated.

FIG. 9 is a block diagram showing a detailed configuration of a wireless terminal test apparatus according to Embodiment 8 of the present invention. A description of a portion that is the same as the description in the seventh embodiment in FIG. 8 is omitted. In FIG. 9, reference numeral 17 denotes a noise generator. In FIG. 9, the same reference numerals as those in FIGS. 1 to 8 denote the same components or components having the same functions, and a description thereof will be omitted. In addition, description of the same parts as those in the first to seventh embodiments will be omitted.

The control section 4 controls the noise generator 17 to generate a noise signal of an arbitrary frequency. The amplitude of the noise signal generated by the noise generator 17 is adjusted by the transmission gain controller 3 under the control of the controller 4, and the base station signal output from each synchronous base station 12 and the mixer 10 They are mixed and arrive at the child device 6.

In the test apparatus for a radio terminal according to the eighth embodiment, the control section 4 controls the transmission gain controller 3 to generate random noise and burst noise, and the radio wave environment in which random noise and burst noise actually occur. Can be realized. Further, by providing a plurality of sets of the noise generator 17 and the transmission gain controller 3, random noise and burst noise for each frequency can be generated, and a more complicated radio wave environment can be realized.

Embodiment 9 FIG. In the above-described first to eighth embodiments, a test is performed by directly connecting the slave unit 6 to be tested to the input / output terminal 21 for inputting / outputting the base station simulation signal. It is characterized in that the test of the slave unit 6 can be performed via the antenna without directly connecting to the input / output terminal.

FIGS. 10 to 16 show a ninth embodiment of the present invention.
1 is a block diagram showing a detailed configuration of a wireless terminal test apparatus according to the first embodiment. 10 to 16, reference numeral 6 denotes a slave unit, 18 denotes an antenna connected to the wireless terminal test apparatus, and 19 denotes an anechoic chamber that houses the antenna 18 and the slave unit 6. Figure 10
In FIG. 16, the same reference numerals as those in FIGS. 1 to 9 denote the same components or components having the same functions, and a description thereof will be omitted. In the following description, description of the same parts as those in the first to eighth embodiments will be omitted.

Since the simulated base station radio wave output from the radio terminal test apparatus already includes the effects of fading and noise at the stage of being transmitted from the antenna 18, in order to remove the influence of the reflected wave after emission, Antenna 18
And the slave unit 6 are housed in the anechoic chamber 19. The simulated base station radio wave output from the base station unit 1 is transmitted from the antenna 18,
By arriving at the slave unit 6 via the antenna 18, the same experiment as the experiment described in the first to eighth embodiments can be performed.

As described above, the antenna 1 is placed in the anechoic chamber 19.
In the configuration in which the slave unit 8 and the slave unit 6 are accommodated, the position at which the slave unit 6 is tested only needs to consider attenuation due to the distance from the antenna 18. Can be realized without moving the position. Therefore, various tests can be performed only by installing the antenna and the slave unit 6 in the anechoic chamber 19.

[0054]

As described above, the radio terminal test apparatus according to the first aspect of the present invention comprises a base station section for generating a base station signal in a pseudo manner, and a phase shifting means for changing the phase of the base station signal. Transmission gain control means for changing the amplitude of a base station signal, control information storage means for storing temporal fluctuation information of the phase and amplitude of a radio signal received or calculated by a radio terminal, and control information storage means Control means for controlling the phase shift means and the transmission gain control means based on the temporal fluctuation information of the phase and the amplitude stored in the control information storage means, and the temporal fluctuation information of the phase and the amplitude stored in the control information storage means The phase and amplitude of the base station signal are controlled on the basis of the above, so that a fading state is created at the output terminal of the transmission gain controller, so that the phase and amplitude are temporally changed based on the stored information. Let it be Accordingly, it is possible to simulate reproducibly specific radio wave environment in the laboratory.

The radio terminal test apparatus according to the second aspect of the present invention comprises a first separating means for separating the uplink and downlink at the input / output terminal of the base station, and an uplink at the input / output terminal of the wireless terminal to be tested. And a second separating means for separating the downlink and the downlink, so that the receiving operation and the communication procedure of the base station can be simulated, and a radio wave environment close to a test in a real field is simulated in a laboratory with good reproducibility. be able to.

A wireless terminal test apparatus according to a third aspect of the present invention includes a reception gain control section for amplifying a signal from the wireless terminal and sending the amplified signal to the base station section, wherein the first separating section includes the base station section and the phase shift section. And a receiving gain control means, a second separating means is provided between the wireless terminal and the receiving gain control means and the transmission gain control means, and the control means performs a phase shift based on the information stored in the control information storage means. Means, transmission gain control means, and reception gain control means, so that the reception operation and communication procedure of the base station can be simulated, and a radio wave environment close to a test in a real field can be simulated in a laboratory with good reproducibility. can do.

A wireless terminal test apparatus according to a fourth aspect of the present invention includes a plurality of sets of a base station unit, a first separation unit, a reception gain control unit, a phase shift unit, and a gain control unit. Signal distributing means for distributing the received signal to each reception gain control unit is provided between the second separation means and the plurality of reception gain control units,
Further, since the mixing means for mixing the transmission signals from the respective gain control means and outputting the mixed signal to the second separation means is provided between each of the gain control means and the second separation means, Each signal can be controlled and simulated, and therefore, a radio wave environment in a more complicated test in a real field can be simulated with good reproducibility in a laboratory.

According to a fifth aspect of the present invention, a wireless terminal test apparatus uses a TDMA system as a wireless communication system, and stores time-varying phase and amplitude information stored in a control information storage means as:
Since the phase and amplitude are changed in slot units using the phase and amplitude information in slot units, any radio wave environment can be simulated in a laboratory with good reproducibility with a simple configuration.

According to a sixth aspect of the present invention, in the radio terminal test apparatus, the base station section includes a base station signal transmitting / receiving terminal for transmitting / receiving a base station signal, and a plurality of delayed signal output terminals for transmitting a delayed base station signal. And a plurality of delay signal output terminals are connected to phase shift means for shifting the delay signal, transmission gain control means for amplifying the delay signal is connected to the phase shift means. Mixing means for mixing the transmission signal from the control means and outputting the mixed signal to the second separation means is provided between each transmission gain control means and the second separation means. An arbitrary multipath radio wave environment in which signals at different times are synthesized or switched can be simulated in a laboratory with good reproducibility.

According to a seventh aspect of the present invention, in the wireless terminal test apparatus, the plurality of base stations are constituted by a plurality of synchronous base stations for generating base station signals in a pseudo manner based on a synchronization timing signal. A synchronous timing signal generating means for generating a synchronous timing signal for controlling the synchronous base station section, wherein the control information storage means controls a plurality of phase shift means and a plurality of gain control means, and Since it is configured to control, the relative timing of a plurality of base station signals in the actual field can be simulated in a laboratory with good reproducibility.

The test apparatus for a wireless terminal according to the eighth aspect of the present invention further includes a pattern generating means for generating background base station signal data, and a modulating means for modulating the generated background base station signal data. A background base station signal generating means for generating a background base station signal based on the synchronization timing signal generated by the synchronization timing signal generation section, and changing the phase of the background base station signal to an output terminal of the background base station signal generation section. Since the phase shift means is connected to the transmission gain control means for changing the amplitude of the background base station signal, the phase shift means is connected to the base station signal which does not generate a communication procedure in the test. Station signals can be generated collectively, and an arbitrary radio wave environment can be simulated with high reproducibility in a laboratory with a simpler device configuration.

According to a ninth aspect of the present invention, there is provided a radio terminal test apparatus comprising: at least one noise generating means for generating noise; and at least one corresponding gain for changing an amplitude of a noise signal generated by the noise generating means. Since it is configured to include the control means, a radio wave environment closer to a real field can be simulated in a laboratory with good reproducibility.

The wireless terminal test apparatus according to the tenth aspect of the present invention is configured to change the synchronization of transmission / reception timing in synchronization with a synchronization timing signal from the outside of the wireless terminal test apparatus. By synchronizing the transmission / reception timing with the input synchronization timing signal and generating a timing signal for linking a plurality of base station apparatuses, it is possible to simulate an environment in which a plurality of base station signals are transmitted at an arbitrary timing.

A radio environment test apparatus for a wireless terminal according to an eleventh aspect of the present invention includes, in addition to the test apparatus for a wireless terminal, an antenna for connecting between the wireless terminal to be tested and the second separating means. , And an anechoic chamber for installing the wireless terminal and the antenna inside,
The test can be performed while the wireless terminal is in actual use, and the environmental change due to the installation position is small, and the mobile test can be realized without actually moving. it can.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a test apparatus for a wireless terminal according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a phase and amplitude control process of the test apparatus for a wireless terminal according to the first embodiment of the present invention on a time axis.

FIG. 3 is a block diagram showing a configuration of a wireless terminal test apparatus according to a second embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a wireless terminal test apparatus according to a third embodiment of the present invention.

FIG. 5 is a diagram expressing a phase and amplitude control process of a test apparatus for a wireless terminal according to a fourth embodiment of the present invention on a time axis.

FIG. 6 is a block diagram showing a configuration of a wireless terminal test apparatus according to a fifth embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of a wireless terminal test apparatus according to a sixth embodiment of the present invention.

FIG. 8 is a block diagram illustrating a configuration of a wireless terminal test apparatus according to a seventh embodiment of the present invention.

FIG. 9 is a block diagram showing a configuration of a wireless terminal test apparatus according to Embodiment 8 of the present invention.

FIG. 10 is a block diagram showing a configuration of a wireless terminal test apparatus according to Embodiment 9 of the present invention.

FIG. 11 is a block diagram showing one configuration of a wireless terminal test apparatus according to a ninth embodiment of the present invention.

FIG. 12 is a block diagram showing one configuration of a wireless terminal test apparatus according to a ninth embodiment of the present invention.

FIG. 13 is a block diagram showing one configuration of a wireless terminal test apparatus according to a ninth embodiment of the present invention.

FIG. 14 is a block diagram showing one configuration of a wireless terminal test apparatus according to a ninth embodiment of the present invention.

FIG. 15 is a block diagram illustrating one configuration of a wireless terminal test apparatus according to a ninth embodiment of the present invention.

FIG. 16 is a block diagram showing one configuration of a wireless terminal test apparatus according to a ninth embodiment of the present invention.

FIG. 17 is a block diagram showing a configuration of a conventional wireless terminal test apparatus.

FIG. 18 is a block diagram showing a circuit configuration of a conventional fading simulator.

[Explanation of symbols]

 Reference Signs List 1 base station unit 2 phase shifter 3 transmission gain controller 9 reception gain controller 4 control unit 5 control information storage unit 6 slave unit 7, 8 circulator 10 mixer 11 distributor 12 synchronous base station unit 13 synchronization timing signal generation unit 14 Background base station signal generator 15 Pattern generator 16 Modulator 17 Noise generator 18 Antenna 19 Anechoic chamber 20 Base station with delay output

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shinji Masuda 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation

Claims (11)

[Claims] 1. A base station unit for generating a base station signal in a pseudo manner, a phase shift unit for changing a phase of the base station signal, a transmission gain control unit for changing an amplitude of the base station signal, and a signal received by a wireless terminal. Or control information storage means for storing time-varying information on the phase and amplitude of the radio signal calculated in advance; and the phase shift based on the time-varying information on the phase and amplitude stored in the control information storage means. Means for controlling the phase and amplitude of the base station signal based on the temporal fluctuation information of the phase and amplitude stored in the control information storage means. A test apparatus for a wireless terminal, wherein a fading state is created at an output terminal of a controller. 2. The test apparatus for a wireless terminal according to claim 1, wherein: first separating means for separating upstream and downstream at an input / output terminal of the base station unit; and upstream and downstream at an input / output terminal of a wireless terminal to be tested. A second separating means for separating the downlink, not only outputting the base station signal generated in the base station to the wireless terminal to be tested, but also receiving the signal from the wireless terminal by the base station and performing the communication procedure. A test apparatus for a wireless terminal, which is realized. 3. The test apparatus for a wireless terminal according to claim 2, further comprising: a reception gain control section for amplifying a signal from the wireless terminal and sending the amplified signal to a base station section, wherein the first separating section is phase-shifted with the base station section. Means and a reception gain control means, a transmission signal from the base station section is output to the phase shift means, a reception signal from the reception gain control means is input to the base station section, The terminal is placed between the terminal and the reception gain control means and the transmission gain control means, outputs the transmission signal from the transmission gain control means to the wireless terminal, inputs the reception signal from the wireless terminal to the reception gain control means, the control means The phase shift means, the transmission gain control means, and the reception gain control means are controlled based on the information stored in the control information storage means, and only the base station signal generated in the base station section is output to the wireless terminal to be tested. No, nothing Test device for a wireless terminal, characterized by implementing the communication procedure with the signal received by the base station section of the terminal. 4. The test apparatus for a wireless terminal according to claim 3, comprising: a plurality of sets of the base station unit, the first separation unit, the reception gain control unit, the phase shift unit, and the gain control unit. Signal distributing means for distributing a reception signal to each reception gain control unit is provided between the second separation means and the plurality of reception gain control units; A mixing means for outputting to the separation means is provided between each transmission gain control means and the second separation means, and only the base station signals generated by the plurality of base stations are output to the radio terminal to be tested. And a plurality of base stations receiving signals from the wireless terminal to implement a plurality of communication procedures. 5. The test apparatus for a wireless terminal according to claim 1, wherein: a TDMA method is used as a wireless communication method, and the control information storage means stores phase and amplitude temporal fluctuation information. A phase and amplitude information for each slot, wherein the phase and amplitude are changed for each slot using phase and amplitude information for each slot. 6. The test apparatus for a wireless terminal according to claim 3, wherein: the base station section has a base station signal transmitting / receiving terminal for transmitting / receiving a base station signal, and a plurality of delayed signal output terminals for transmitting a delayed base station signal. Wherein the plurality of delay signal output terminals are respectively connected to phase shift means for shifting the phase of the delay signal, and the phase shift means is connected to transmission gain control means for amplifying the delay signal. Mixing means for mixing the transmission signal from the transmission gain control means and outputting the mixed signal to the second separation means is provided between each transmission gain control means and the second separation means, and the temporal variation of the stored phase and amplitude is provided. By controlling the phase of the phase shift means and the amplitudes of the transmission gain control means and the reception gain control means based on the information, a fading state is created at the signal output terminal, so that the base station unit can receive a signal from the wireless terminal. A test procedure for a wireless terminal, wherein the test procedure simulates an environment in which signals passing through a plurality of propagation paths arrive with an arbitrary delay amount. 7. The test apparatus for a wireless terminal according to claim 4, wherein the plurality of base station units are constituted by a plurality of synchronous base station units for generating a base station signal based on a synchronization timing signal. A synchronization timing signal generation unit that generates the synchronization timing signal for controlling a synchronous base station unit, wherein the control information storage unit controls the plurality of phase shift units and the plurality of gain control units, and controls the synchronization timing. By controlling the signal generation means and controlling the phase and amplitude based on the stored temporal fluctuation information of the phase and amplitude, a fading state at the signal output terminal is created, and the signal from the wireless terminal is transmitted to the synchronous base station. The communication procedure is realized by local reception, simulating an environment in which signals from a plurality of base stations arrive at an arbitrary timing. Test equipment for wireless terminals. 8. The test apparatus for a wireless terminal according to claim 7, further comprising: pattern generating means for generating background base station signal data; and modulating means for modulating the generated background base station signal data. Based on the synchronization timing signal generated by the synchronization timing signal generation unit, a background base station signal generation unit that generates a background base station signal, the output terminal of the background base station signal generation unit, the phase of the background base station signal, A phase shift means for changing the phase shift means is connected, a transmission gain control means for changing the amplitude of the background base station signal is connected to the phase shift means, and the phase shift means and the phase shift means based on the stored temporal fluctuation information of the phase and the amplitude. By controlling the phase and amplitude of the background base station signal by the transmission gain control means, a fading state is created at the signal output terminal, and the signal from the wireless terminal is transmitted to the synchronous base station unit. By realizing a communication procedure by receiving, simulating an environment where signals from a plurality of base stations arrive at an arbitrary timing, and transmitting a plurality of transmission signals of a base station in which no communication procedure occurs to one synchronous base station unit. A test apparatus for a wireless terminal, wherein the test apparatus is realized by using the following. 9. The test apparatus for a wireless terminal according to claim 8, further comprising: one or more noise generating means for generating noise; and one or more corresponding ones for changing an amplitude of a noise signal generated by said noise generating means. And a gain control unit, wherein the mixing unit mixes the noise signal amplified by the transmission gain control unit with a base station transmission signal from a base station unit. 10. The wireless terminal test apparatus according to claim 7, wherein: a base station output from a plurality of base station units according to a synchronization timing signal input from outside the wireless terminal test apparatus. A radio terminal test apparatus, which controls signals and simulates an environment in which base station signals from a plurality of base stations arrive at an arbitrary timing. 11. The wireless terminal test apparatus according to claim 1, further comprising: an antenna for connecting a wireless terminal to be tested with a second separating unit; and the wireless terminal. An anechoic chamber for installing the terminal and the antenna therein, wherein a test of the wireless terminal is enabled by connecting a wireless signal between the wireless terminal and the second separating unit. Radio wave environment test equipment for wireless terminals.