JP2009188733A - Test environment providing apparatus and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide such an environment that a high-certainty test can be performed when testing a radio communication apparatus. <P>SOLUTION: A determination unit 14 determines the reception frequency of a reception radio wave on the basis of designated test information to decide whether the reception frequency is a frequency to be tested or not and in a case where the reception frequency is not the frequency to be tested, it is decided whether the reception frequency is a known frequency or not. In a case where the reception frequency is not the known frequency, a communication system presuming unit 16 presumes a communication system corresponding to the reception frequency. An interference status confirmation unit 17 confirms an interference status in a communication system in which the reception frequency is the known frequency, or in the presumed communication system. On the basis of the confirmation result of the interference status, a transmission unit 18 adjusts transmission power of an interference wave and transmits the interference wave. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a test environment providing apparatus and method, and in particular, a technique for detesting a radio wave in an environment where there is a radio wave that is not desired to be tested when testing a wireless communication terminal such as a mobile phone. About.

  In recent years, the penetration rate of mobile phone terminals in Japan has reached the level of one per person, and the worldwide penetration rate tends to increase in the future. Along with this, the demand for testing wireless communication devices has increased, and in order to improve the quality of devices, highly accurate testing is required. In such a test for a wireless communication device such as a mobile phone, the wireless communication device to be tested and a test counterpart device (for example, if the test is for a mobile phone terminal, the opposite device is a base station simulator or the like). It is an important confirmation point to confirm whether or not radio communication with the

  When testing a wireless communication device in this way, radio waves emitted by other wireless communication devices may affect the test. For example, when testing a 3G (third generation) mobile terminal using the W-CDMA communication method, even if a test is performed assuming only the radio wave transmitted from the base station simulator of the opposite device, the test environment is close to the test environment. There is a risk that an unexpected test result may be obtained if a radio wave emitted by the installed base station is actually received.

  In such a case, by constructing a test environment in the anechoic chamber, it is possible to exclude radio waves other than the specific frequency to be tested. However, anechoic chambers are generally expensive and large in size, so only a limited number of them can be prepared in a limited place, and they can be prepared for each test environment or occupied only by a certain test environment. difficult. Further, for example, when the equipment such as a base station simulator is very large, the test environment cannot always be constructed in the anechoic chamber.

  Therefore, there is a need for a device that can be used to create a test environment that is less expensive and requires a small space, so that this radio wave is not subject to testing in environments where radio waves that do not want to be tested exist. There are technologies that interfere.

  Other station radio waves that periodically receive the frequency of radio waves from other stations by the receiver of other station radio wave blocking devices installed in areas where the use of wireless communication devices such as mobile phones is restricted as a technology that interferes with radio waves A shut-off device is disclosed in Patent Document 1. The other station radio wave blocking device recognizes the frequency of the radio wave by the control unit, sets the frequency of the interference wave for blocking the other station radio wave, and transmits the interference wave of the set frequency band from the transmission unit. In the area, the radio wave can be blocked only for the frequency band, and communication by the dedicated network of other stations is completely disabled.

  Patent Document 2 discloses a device having a weak radio wave transmission level, a small size, and a low cost for the purpose of preventing the influence of radio waves emitted from a mobile phone on medical equipment and the like. This device extracts only the component of the frequency band desired to be disturbed from the broadband noise by a filter and transmits it as a jamming radio wave.

  Further, a jamming device for the purpose of disturbing a mobile phone call is already on the market.

JP 2000-316181 A Japanese Patent Application Laid-Open No. 11-55225

  The following analysis is given in the present invention.

  First, commercially available jamming radio wave generators are intended to indiscriminately disturb mobile phone calls, and so radio waves to be tested will be jammed.

  Further, in Patent Document 2, a device that generates a jamming radio wave is disclosed, but there is no description about a technique for selecting a radio wave to be tested using this device.

  Furthermore, in Patent Document 1, the content of determining the frequency at which the other-station radio wave exists from the measurement result of RSSI (Received Signal Strength Indicator) and instructing the transmission unit to transmit the interference wave of the same frequency. Is described. However, a method for determining the transmission power of the jamming wave, a method for determining whether or not another station radio wave has been blocked by the jamming wave, and a method for maintaining the blocking status of the other station radio wave are not shown. That is, there is no description of how strong the interference wave is emitted, and it is impossible to determine whether or not the interference can be reliably performed only by RSSI measurement that merely indicates the signal strength at a certain frequency. Also, there is no disclosure on how to maintain the disturbing state. For this reason, even if an interference wave is transmitted in order to block other-station radio waves using the technique of Patent Document 1, it is difficult to perform a highly accurate test of a wireless communication device.

  A test environment providing apparatus according to one aspect of the present invention is a test environment providing apparatus that transmits an interfering wave when testing a radio apparatus, and is provided for each communication method of radio waves having a predetermined frequency to be disturbed. Corresponding to the interference state confirmation unit that measures the interference state of the received radio wave, and a transmission unit that transmits the interference wave having a gain according to the measurement result in the interference state confirmation unit.

  A test environment providing method according to another aspect of the present invention is a method in which a test environment providing device transmits an interference wave when testing a wireless device, and communication of radio waves having a predetermined frequency to be disturbed. Corresponding to each method, the interference state of the received radio wave is measured, and the interference wave having a gain corresponding to the measurement result is transmitted.

  According to the present invention, since the interference state of the received radio wave is measured and the interference wave having a gain according to the measurement result is transmitted, it is possible to provide an environment in which a highly accurate test is performed in the test of the wireless communication device. it can.

  A test environment providing apparatus according to an embodiment of the present invention is a test environment providing apparatus that transmits an interference wave when testing a wireless device. This device includes a jamming status confirmation unit for measuring the jamming status of a received radio wave corresponding to each communication method of radio waves to be jammed having a predetermined frequency, and a jamming having a gain according to a measurement result in the jamming status confirmation unit. A transmission unit for transmitting waves.

  In the test environment providing apparatus of the present invention, when the reception frequency of the received radio wave is determined based on the specified test information to determine whether the reception frequency is the test target frequency, and the reception frequency is not the test target frequency A determination unit that determines whether or not the reception frequency is a known frequency, and a communication method estimation unit that estimates a communication method corresponding to the reception frequency when the reception frequency is not a known frequency. . In addition, the interference state confirmation unit confirms the interference state in a communication method whose reception frequency is a known frequency or an estimated communication method. Further, the transmission unit may transmit the jamming wave by adjusting the transmission power of the jamming wave based on the confirmation result of the jamming state.

  The test environment providing apparatus of the present invention includes a frequency band allocation information table that holds frequency band allocation information that exists for each type of installation location of the test environment providing apparatus. The communication method corresponding to the reception frequency may be estimated by inputting and referring to the frequency band allocation information table.

  In the test environment providing apparatus of the present invention, the interference state confirmation unit may include respective means for confirming the interference state corresponding to each communication method.

  In the test environment providing apparatus of the present invention, the determination unit may input information on the test target frequency from the outside and determine whether or not the reception frequency of the received radio wave is the test target frequency.

  According to the test environment providing device as described above, it is determined whether the radio waves from other stations are disturbed to the extent that the test results are not affected. If the interference is insufficient, the transmission power of the disturbing waves is readjusted. can do. Therefore, by using such a test environment providing device, it is possible to provide an environment for performing a highly accurate test on a wireless communication device.

  Hereinafter, it will be described in detail with reference to the drawings in accordance with embodiments.

  FIG. 1 is a block diagram showing a configuration of a test environment providing apparatus according to an embodiment of the present invention. In FIG. 1, the test environment providing apparatus includes a receiving antenna 10, a receiving unit 11, a baseband unit 12, an interface unit 13, a determination unit 14, a frequency band allocation information table 15, a communication method estimation unit 16, an interference state confirmation unit 17, The transmission unit 18 includes a transmission antenna 20, and the transmission unit 18 includes a power adjustment unit 19.

  The receiving unit 11 demodulates radio waves received via the receiving antenna 10 and outputs a demodulated signal to the baseband unit 12.

  The baseband unit 12 obtains a baseband signal and RSSI measurement information from the demodulated signal and outputs them to the determination unit 14.

  The interface unit 13 estimates each of the designation information input by the tester, that is, information on the installation location in the initial setting (for example, “country = Japan”) and information on the frequency to be tested at the time of the test. To the unit 16 and the determination unit 14.

  The determination unit 14 determines whether the baseband signal is a signal to be tested and whether it is a known signal based on the information on the frequency to be tested and the RSSI measurement information (own station / others). Station determination), and RSSI measurement information accompanying the determination result is output to the communication method estimation unit 16. Further, the baseband signal is output to the interference state confirmation unit 17.

  The frequency band allocation information table 15 holds frequency band allocation information that exists for each type of installation location such as a country, and provides it to the communication method estimation unit 16 as necessary.

  The communication method estimation unit 16 determines the communication method (PHS, GSM, W−) of the other station from the information on the installation location designated by the tester as an initial setting and the frequency at which the other station obtained from the RSSI measurement information exists. CDMA, etc.) and has a function of selecting a method for confirming the interference state. That is, the communication method estimation unit 16 estimates a communication method for a frequency at which a radio wave that is not a test target and affects the test for the first time is detected. The communication method is estimated by referring to the RSSI measurement information obtained from the determination unit 14, the installation location information specified by the tester via the interface unit 13, and the frequency band allocation information table 15. The communication method that is the estimation result is notified to the interference status confirmation unit 17.

  The jamming status confirmation unit 17 determines the jamming status of other-station radio waves based on the communication method estimated by the communication method estimation unit 16 for the baseband signal input via the baseband unit 12 and the determination unit 14. The determination result is output to the power adjustment unit 19 of the transmission unit. The interference status confirmation unit 17 includes a small block for determination corresponding to various communication methods (for example, PHS, GSM, W-CDMA, etc.), and confirms the interference status of the test non-target frequency according to the communication method.

  For example, when the test non-target is W-CDMA, the corresponding small block is a matched filter (an apparatus that extracts a desired signal component buried in noise) from a baseband signal input via the baseband unit 12 and the determination unit 14. ) To detect CPICH (Common Pilot Channel) and measure SIR (Signal to Interference power Ratio). Then, it is determined whether the SIR value is sufficiently deteriorated so that the radio wave of the corresponding frequency does not affect the test, and the determination result is notified to the transmission unit 18. In the case of W-CDMA, a more reliable determination can be made by using the SIR indicating the ratio between the average power of the actual signal and the noise interference wave power.

  In the case of PHS, the interference status is confirmed by whether or not a common control carrier (BCCH) can be detected. In PHS, in order to confirm the presence of a base station, it is preferable to determine whether or not a common control carrier (BCCH) to be detected first by the terminal can be detected.

  Further, in the case of GSM, the interference state is confirmed by whether or not FB (Frequency Correction Burst) and SB (Synchronization Burst) can be detected. In GSM, it is preferable to determine whether it is possible to detect the FB or SB that the terminal first tries to detect in order to achieve frequency and time synchronization with the base station.

  The power adjustment unit 19 receives the determination result notified from the interference state confirmation unit 17, and when the interference is not sufficiently performed, increases the transmission power of the interference wave and transmits the transmission antenna 20 from the transmission unit 18. The jamming wave is transmitted through

  Next, the operation of the test environment providing device will be described. FIG. 2 is a flowchart showing the operation of the test environment providing apparatus according to the embodiment of the present invention.

  In step S <b> 11, the tester specifies, via the interface unit 13, information on the installation location in the initial setting and the frequency to be tested at the time of the test to the test environment providing apparatus.

  In step S <b> 12, the determination unit 14 performs various determinations on the frequency at which the radio wave affecting the test is detected from the measurement result of the received signal strength input from the baseband unit 12.

  In step S13, if it is the test target frequency (Yes in step S13), nothing is performed because no interference is required.

  In step S13, when it is a test non-target frequency (No in step S13), in step S14, it is determined whether or not the frequency has already been reported before.

  If it is an unknown frequency (No in step S14), in step S15, the communication method estimation unit 16 estimates a communication method related to the unknown frequency, and proceeds to step S16.

  If the frequency is a known frequency (Yes in step S14), the communication method is already known, and therefore in step S16, the jamming status confirmation unit 17 determines the jamming status of the other-station radio waves.

  In step S <b> 17, the power adjustment unit 19 receives the determination result notified from the interference state confirmation unit 17, and increases the transmission power of the interference wave when the interference is not sufficiently performed.

  If an interference wave is transmitted, the RSSI for the test non-target frequency increases, so this frequency is always detected after the first detection.

  Since the test environment providing apparatus operates as described above, the test non-target frequency is surely disturbed, and the disturbed state is maintained thereafter.

  It should be noted that the disclosures of the aforementioned patent documents and the like are incorporated herein by reference. Within the scope of the entire disclosure (including claims) of the present invention, the embodiments and examples can be changed and adjusted based on the basic technical concept. Various combinations and selections of various disclosed elements are possible within the scope of the claims of the present invention. That is, the present invention of course includes various variations and modifications that could be made by those skilled in the art according to the entire disclosure including the claims and the technical idea.

It is a block diagram which shows the structure of the test environment provision apparatus which concerns on the Example of this invention. It is a flowchart showing operation | movement of the test environment provision apparatus which concerns on the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Reception antenna 11 Reception part 12 Baseband part 13 Interface part 14 Determination part 15 Frequency band allocation information table 16 Communication system estimation part 17 Interference condition confirmation part 18 Transmission part 19 Power adjustment part 20 Transmission antenna

Claims (7)

A test environment providing device for transmitting a jamming wave when testing a wireless device,
Corresponding to each communication method of radio waves to be disturbed having a predetermined frequency, an interference status confirmation unit that measures the interference status of received radio waves,
A transmission unit for transmitting the jamming wave having a gain according to the measurement result in the jamming status confirmation unit;
A test environment providing apparatus comprising: The reception frequency of the received radio wave is determined based on the specified test information to determine whether the reception frequency is the test target frequency. If the reception frequency is not the test target frequency, the reception frequency is a known frequency. A determination unit for determining whether or not there is,
When the reception frequency is not a known frequency, a communication method estimation unit that estimates a communication method corresponding to the reception frequency;
With
The interference state confirmation unit performs confirmation of an interference state in a communication method in which the reception frequency is a known frequency or the estimated communication method,
2. The test environment providing apparatus according to claim 1, wherein the transmission unit adjusts transmission power of the interference wave based on a result of confirmation of the interference state and transmits the interference wave. A frequency band allocation information table that holds frequency band allocation information that exists for each type of installation location of the test environment providing device,
The test environment according to claim 2, wherein the communication method estimation unit inputs information about an installation location from outside and estimates a communication method corresponding to a reception frequency by referring to the frequency band allocation information table. Providing device.   3. The test environment providing apparatus according to claim 2, wherein the interference status confirmation unit includes respective means for confirming the interference status corresponding to each communication method.   The test environment providing apparatus according to claim 2, wherein the determination unit inputs information on a test target frequency from the outside and determines whether or not the reception frequency of the received radio wave is the test target frequency. A test environment providing device transmits a jamming wave when testing a wireless device,
Corresponding to each communication method of radio waves to be disturbed having a predetermined frequency, a test environment providing method characterized by measuring a jamming situation of received radio waves and transmitting the jamming waves having a gain according to the measurement result . Specifying test information;
Determining the received frequency of the received radio wave based on the designated test information;
As a result of the determination of the reception frequency, determining whether the reception frequency is a test target frequency;
Determining whether the received frequency is a known frequency when the received frequency is not the test target frequency; and
When the reception frequency is not a known frequency, estimating a communication method corresponding to the reception frequency; and
Checking the interference status in the communication scheme in which the reception frequency is a known frequency or the estimated communication scheme;
Adjusting the transmission power of the jamming wave based on the result of confirmation of the jamming situation;
The test environment providing method according to claim 6, further comprising:

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