JP2002319891A - Reception sensitivity measuring method for radio telephone terminal and reception sensitivity measuring system for radio telephone terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the constitution of a testing device, to facilitate the measuring procedure and to shorten test time regarding the measurement of the reception sensitivity of the radio telephone terminal of a code division multiple access type. SOLUTION: In this measuring method of the reception sensitivity of the radio telephone terminal of the code division multiple access type, pilot signals and noise are combined in the testing device (S300), the combined signals are transmitted as test signals (S700), the test signals are received by the radio telephone terminal which is an object to be tested (S800) and a reception level is measured on the basis of the received test signals (S900).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring reception sensitivity of a radio telephone terminal and a system for measuring reception sensitivity for a radio telephone terminal, and more particularly to a code division multiple access (CDMA) radio. This is suitable for measuring the reception sensitivity of a telephone terminal using a test device.

[0002]

2. Description of the Related Art Conventionally, a test apparatus as shown in FIG. 4 has been used to measure the reception sensitivity of a mobile telephone terminal of this kind of code division multiple access type. This test apparatus includes a pilot signal generation circuit 10, a synchronization data generation circuit 20, a control data generation circuit 30, a communication data generation circuit 40, a noise generation circuit 50, and a synthesis for synthesizing signals generated by each of the generation circuits 10,. Part 6
0, and a modulator 7 for converting the synthesized signal.
0, an RF transmission unit 80, and a transmission unit 90. Here, each of the pilot signal generation circuit 10, the synchronization data generation circuit 20, the control data generation circuit 30, and the communication data generation circuit 40 is a signal generation unit 1.
,..., A spreading section 13 for spreading the signal generated by the generating section 11,..., And an adjusting section 15 for adjusting the level of the spread signal. The noise generation circuit 50 includes a noise generation unit 51 and an adjustment unit 55 that adjusts the level of noise generated by the generation unit 51.

The measuring method of the receiving sensitivity by the above device is performed according to the following procedure. First, a signal generated and spread by the pilot signal generating circuit 10 is transmitted from the transmitting unit 90 to the wireless telephone terminal to be tested, and the wireless telephone terminal receives this signal. Next, a signal generated and spread by the synchronous data generation circuit 20 is transmitted from the transmitting unit 90 to the wireless telephone terminal, and the wireless telephone terminal receives this signal. After that, the control data generation circuit 3
A signal generated by 0 and spread or the like is transmitted from the transmitting unit 90 to the wireless telephone terminal, and the wireless telephone terminal receives this signal. Next, the wireless telephone terminal transmits a control signal of the wireless telephone terminal to the test device and exchanges the control signal. Thereafter, a communication signal generated and spread by the communication data generation circuit 40 is transmitted from the transmitting unit 90 to the wireless telephone terminal, and the wireless telephone terminal receives this signal. By measuring the level at which the wireless telephone terminal receives a communication signal erroneously, the reception sensitivity is measured.

However, the above method has a problem that the measurement procedure is complicated and the test time is long. Further, there is a problem that the configuration of the test apparatus is complicated, which leads to an increase in the cost of the test apparatus.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned problems, and has a simple configuration of a test apparatus, which simplifies a measurement procedure and shortens a test time. An object of the present invention is to provide a method for measuring the reception sensitivity of a wireless telephone terminal and a system for measuring the reception sensitivity for a wireless telephone terminal.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and a feature of the receiving sensitivity measuring method according to the present invention is that a receiving sensitivity of a code division multiple access type radio telephone terminal is provided. The test method combines a pilot signal with noise in a test apparatus, transmits the combined signal as a test signal, receives the test signal by a wireless telephone terminal under test, and adds the received test signal to the test signal. It is to measure the reception level on the basis of this.

[0007] According to the measuring method having the above-described configuration, the reception level is measured by the pilot signal using the pilot signal transmitted at the stage of establishing the communication state. Do not take any steps. Therefore, the configuration of the test apparatus can be simplified, and the measurement procedure can be simplified and the test time can be shortened.

In the method of measuring the reception sensitivity of a wireless telephone terminal according to the present invention, naturally occurring noise can be used as the noise combined with the pilot signal. It is also possible to adopt a configuration in which noise to be combined with a pilot signal is generated by a noise generation circuit, and this noise is combined with the pilot signal.

In the method of measuring the reception sensitivity of a wireless telephone terminal according to the present invention, the "reception level measurement" is a method of comparing a transmitted signal with a received signal and examining the difference between the two. Alternatively, a method of measuring the reception level based on whether or not the wireless telephone terminal can recognize that the received signal is a pilot signal can be adopted.

That is, in the method for measuring the reception sensitivity of a wireless telephone terminal according to the present invention, a test signal received by the wireless telephone terminal is transmitted to a test apparatus, and the test signal is transmitted to the test apparatus. It is also possible to adopt a configuration for measuring the reception level by comparing the transmitted test signal with the received test signal.

In the case where the above configuration is adopted, since the test apparatus recognizes the test signal transmitted by itself, the test apparatus transmits the test signal transmitted by itself and the test signal received from the wireless telephone terminal. By performing the comparison, the reception level can be accurately determined. In other words, it is also possible to provide so that the so-called error rate (the ratio of the difference between the transmitted signal and the received signal) can be measured.

On the other hand, in the method for measuring the reception sensitivity of a wireless telephone terminal according to the present invention, the configuration described in claim 4 can be adopted. According to a fourth aspect of the present invention, the reception level is measured based on whether the test signal received by the wireless telephone terminal is determined to be a pilot signal.

In the case where the above configuration is adopted, when the portable telephone terminal receives the transmitted test signal, it determines whether or not the signal is a pilot signal, and receives the test signal based on the determination result. The level can be easily measured. In other words, the test can be performed by a test device having an easy and simple configuration without providing a comparison unit or the like in the test device.

Further, in the method for measuring the reception sensitivity of a wireless telephone terminal according to the third or fourth aspect, after the test signal is transmitted, the test apparatus transmits the signal to the wireless telephone terminal. It is preferable to employ a configuration for transmitting a request signal for requesting transmission of information on the received test signal.

[0015] Thus, the radio telephone terminal that has received the test signal and further received the request signal can transmit information about the test signal to the test apparatus and measure the reception level. Here, the “information about the test signal” refers to the received test signal itself,
It means information on the result of the determination as to whether or not the signal is a pilot signal.

Further, the system for measuring the reception sensitivity of a radio telephone terminal according to the present invention is a measurement system for measuring the reception sensitivity of a code division multiple access type radio telephone terminal by using a test device, wherein the test device transmits a pilot signal. A pilot signal generating unit that generates the signal, a combining unit that combines the pilot signal generated by the pilot signal generating unit with noise, and a transmitting unit that transmits the combined signal as a test signal to a wireless telephone terminal to be tested. is there.

That is, a pilot signal is generated in a pilot generation section of the test apparatus, and the pilot signal is synthesized with noise in a synthesis section, and the synthesized signal can be transmitted as a test signal to a wireless telephone terminal by a transmission section. Things.

According to a sixth aspect of the present invention, the test apparatus is provided with a comparing means for comparing the transmitted test signal with a test signal returned from a wireless telephone terminal receiving the test signal. And

In the measurement system having the above configuration, the test apparatus receives a test signal returned from the wireless telephone terminal that has received the test signal, and compares the received test signal with the already transmitted test signal. Thus, the reception level of the wireless telephone terminal can be accurately measured. As described above, the reception level can be determined by using the pilot signal transmitted at the stage of establishing the communication state, and a complicated procedure as in the related art is not performed. This facilitates the measurement procedure and shortens the test time. Moreover, since the transmitted test signal is compared with the received test signal, a so-called error rate can be measured, and an extremely accurate reception level can be measured.

According to a seventh aspect of the present invention, there is provided a measuring system for determining whether or not a reception level is possible based on information on a result of whether or not a radio telephone terminal having received a test signal has determined the test signal to be a pilot signal. Means is provided.

In the measuring system having the above configuration, the radio telephone terminal that has received the test signal transmitted from the transmitting unit determines whether or not the received test signal is a pilot signal. Is received by the test apparatus, and whether or not the reception level is acceptable is determined based on the determination result. For this reason, the reception level can be determined by using the pilot signal transmitted at the stage of establishing the communication state, and a complicated procedure as in the related art is not performed, thereby simplifying the configuration of the test apparatus. , And the measurement procedure can be simplified and the test time can be shortened. Moreover, it is sufficient to provide a determination means for determining whether the reception level is acceptable based on the information on whether or not the radio telephone terminal has determined that the test signal is a pilot signal. Therefore, the configuration of the test apparatus can be made easier and simpler.

Further, in the reception sensitivity measuring system for a wireless telephone terminal according to the present invention, a request signal for requesting the test apparatus to transmit information related to the received test signal to the wireless telephone terminal is provided. Is preferably provided so as to be transmitted.

By adopting this configuration, the radio telephone terminal that has received the test signal and the request signal from the test apparatus can
The information on the test signal is transmitted to the test apparatus, and the reception level can be measured. Here, the “information about the test signal” means the received test signal itself, information on the determination result as to whether or not the signal is a pilot signal, and the like.

In the system for measuring the reception sensitivity of a wireless telephone terminal according to the present invention, it is possible to use noise which naturally generates noise combined with a pilot signal. As described above, it is also possible to adopt a configuration in which the test apparatus includes a noise generation circuit that generates noise to be combined with the pilot signal. In this case, the test signal is generated by combining the noise generated by the noise generation circuit with the pilot signal.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a receiving sensitivity measuring system according to the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram for explaining an outline of a system according to an embodiment of the present invention. FIG. 2 is a flowchart for explaining the outline of the measurement method according to the embodiment. FIG. 3 is a flowchart illustrating an outline of a measurement method according to another embodiment.

Test apparatus 1 in the system of the present embodiment
Reference numeral 00 denotes a pilot signal generation circuit 110 for generating a pilot signal, a noise generation circuit 120 for generating noise, and a pilot signal generation circuit 110 and a pilot generated from the noise generation circuit 120, as shown in FIG. Combining unit 130 that combines the signal and the noise signal
A modulating unit 140 that modulates the synthesized signal; an RF transmitting unit 150 that converts a signal modulated by the modulating unit 140 into a high-frequency signal; and a level that adjusts the level of the signal converted by the RF transmitting unit 150. Adjustment unit 160
And a transmitting unit 170 that transmits the signal whose level has been adjusted by the level adjusting unit 160 to the wireless telephone terminal to be tested as a test signal. In addition, the test apparatus 100 has a memory (not shown) for storing a signal to be transmitted. In the present embodiment, the memory is provided so as to store the test signal transmitted from the transmitting unit 170. Have been.

The pilot signal generating circuit 110 includes a pilot signal generating section 111 for generating a pilot signal.
And a spreading section 113 for spreading the pilot signal generated in the pilot signal generating section 111, and a pilot signal level adjusting section 115 for adjusting the level of the signal spread in the spreading section 113. Here, the spreading section 113 performs so-called primary spreading, and spreads the pilot signal and generates a quaternary signal for secondary spreading (four-phase spreading). Also,
The modulating section 140 performs four-phase spreading on the signal synthesized by the synthesizing section 130.

The noise generating circuit 120 includes a noise generating section 121 and a noise level adjusting section 123 for adjusting the level of noise generated in the noise generating section 121.
And

Further, the radio telephone terminal (not shown) to be tested receives the test signal transmitted from the test apparatus 100 by the antenna unit, and receives the test signal from the test apparatus 1.
It is provided to reply to 00. Here, this reply is configured to reply in response to a reply request signal from the test apparatus 100. That is, the test apparatus 100
A request signal for returning a test signal is provided to the wireless telephone terminal to be tested.

The test apparatus 100 receives the test signal returned as described above, and converts the received signal into
It has a comparing means (not shown) for comparing with the transmitted signal (test signal stored in the memory). The comparing means is composed of an arithmetic processing unit such as a CPU, and compares the returned test signal with the test signal stored in the memory to measure the reception level of the wireless telephone terminal.

Next, a method of measuring the receiving sensitivity by the above system will be described.

First, pilot signal generation circuit 110 generates a pilot signal. Here, in pilot signal generating circuit 110, a pilot signal is first generated in pilot signal generating section 111 (S1).
00), and the generated pilot signal is
(S110), and the spread pilot signal is adjusted to a desired level by pilot signal level adjusting section 115 (S120).

In the noise generation circuit 120,
Generates noise. Here, in the noise generation circuit 120, first, noise is generated in the noise generation unit 121 (S200), and the generated noise is adjusted to a desired level in the noise level adjustment unit 123 (S210).

The pilot signal and noise generated in each of the circuits 110 and 120 as described above are
(S300). Then, the combined signal is modulated by the modulator 140 (S40).
0). Then, the modulated signal is converted into a high-frequency signal in the RF transmitting section 150 (S500).

Then, the signal synthesized, modulated and converted as described above is adjusted to a desired level by the level adjusting section 160 (S600). Then, the signal whose level has been adjusted is transmitted as a test signal from transmitting section 170 to the wireless telephone terminal to be tested (S700). At the time of this transmission, the transmitted test signal is stored in the memory (S710).

The signal transmitted from the transmitting section 170 as described above is received by the wireless telephone terminal (S800), and the received test signal is returned to the test apparatus 100 (S82).
0). At the time of this reply, first, a request signal is transmitted from the test apparatus 100 (S810), and after the wireless telephone terminal receives the request signal, a test signal is returned (S8).
20).

When the test apparatus 100 receives the returned test signal, the received test signal is compared with the test signal stored in the memory by the comparing means (S900). Then, as a result of the comparison, a match
By detecting the mismatch, the so-called error rate (the ratio of the difference between the transmitted signal and the received signal) is measured,
The reception level of the wireless telephone terminal will be measured.

The above procedure is repeated for each level adjusting unit 16.
The reception level is measured a plurality of times by changing the level of 0,.... Note that each of the level adjustment units 160,.
Are the pilot signal level adjustment unit 115, the noise level adjustment unit 123, and the level adjustment unit 160 of the synthesized signal.
Point to.

As described above, in the system and method of the present embodiment, the reception level of the wireless telephone terminal can be determined using the pilot signal transmitted at the stage of establishing the communication state. Since a complicated procedure is not performed unlike the related art, the configuration of the test apparatus 100 can be simplified. Further, as described above, the measurement procedure is easy, and therefore, there is an advantage that the test time can be reduced.

Further, the level of each signal is adjusted by the level adjusters 160,..., The change in the reception level of the wireless telephone terminal can be measured, and the level at which a communication failure may occur can be confirmed. is there.

Moreover, since the error rate is measured by comparing the test signal before reception with the test signal after reception by the comparing means, it is possible to accurately determine the reception level. Have.

Although the above embodiment has the above configuration and the above advantages, the present invention is not limited to this. That is, it is also possible to use a naturally occurring noise as the noise combined with the pilot signal without providing the noise generation circuit 120, for example. In this case, the level adjustment is performed by the level adjustment unit 160 that adjusts the level of the synthesized and converted signal.

Also, in the above-described embodiment, the description has been given of the case where the level is adjusted in each level adjusting section 160. However, when the noise generating circuit 120 is provided as described above, any of the level adjusting sections may be used. Level adjustment is also possible.

Further, in the above embodiment, the test apparatus 100 has a comparing means, and compares the signal stored in the memory with the returned test signal by the comparing means.
The reception level is measured by measuring a so-called error rate. However, the present invention is not limited to this. For example, it is determined whether the radio telephone terminal recognizes a pilot signal. The measurement of the reception level is also within the range intended by the present invention.

That is, for example, the test apparatus is provided with a judging means for judging the acceptability of the reception level based on the information on the result as to whether or not the radio telephone terminal which has received the test signal has judged the test signal as a pilot signal. It is also possible to adopt a configuration. Thus, as shown in FIG. 3, when the test signal is received by the wireless telephone terminal as the device under test, the wireless telephone terminal determines whether or not the received test signal is a pilot signal (S801). The result (OK or NG) is transmitted from the wireless telephone terminal to the test apparatus (S821), and the determination means of the test apparatus that has received the result determines whether or not the reception level is acceptable. In the illustrated example, the transmission of the determination result is
Similarly to the above-described embodiment, the test apparatus transmits a determination result request signal to the wireless telephone terminal (S811), and is provided so that the wireless telephone terminal transmits the determination result by receiving the request signal. Have been. By adopting the above configuration, the memory and the comparison means as in the above-described embodiment are not required, and the reception level can be measured more quickly with a simpler configuration.

[0046]

As described above, according to the present invention, the reception level is determined by using the pilot signal transmitted at the stage of establishing the communication state. This has the effect of simplifying the configuration of the test apparatus, simplifying the measurement procedure, and shortening the test time without performing the test.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating an outline of a system according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating an outline of a measurement method according to the embodiment.

FIG. 3 is a flowchart illustrating an outline of a measurement method according to another embodiment.

FIG. 4 is an explanatory diagram of a conventional test apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Test apparatus 110 Pilot signal generating circuit 111 Pilot signal generating unit 113 Spreading unit 115 Level adjusting unit 120 Noise generating circuit 121 Noise generating unit 123 Level adjusting unit 130 Combining unit 140 Modulating unit 150 RF transmitting unit 160 Level adjusting unit 170 Transmitting unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04L 29/14 H04L 13/00 315 F-term (Reference) 5K022 EE01 EE31 5K035 AA04 AA07 CC07 CC10 DD03 EE04 FF03 FF04 GG02 JJ04 5K042 AA06 BA14 CA13 DA19 EA01 FA01 FA11 FA15 FA22 GA02 JA01 LA11 5K067 AA42 CC10 DD44 EE02 EE12 HH22 HH23 LL11

Claims (9)

[Claims] 1. A method for measuring the reception sensitivity of a code division multiple access wireless telephone terminal, comprising: combining a pilot signal with noise in a test apparatus; transmitting the combined signal as a test signal; A reception sensitivity measurement method for a wireless telephone terminal, comprising: receiving a signal by a wireless telephone terminal to be tested; and measuring a reception level based on the received test signal. 2. The method for measuring reception sensitivity of a wireless telephone terminal according to claim 1, wherein a noise to be combined with a pilot signal is generated by a noise generation circuit, and the noise is combined with the pilot signal. A method for measuring the reception sensitivity of telephone terminals. 3. The method of measuring reception sensitivity of a wireless telephone terminal according to claim 1, wherein a test signal received by the wireless telephone terminal is transmitted to the test device, and the test signal transmitted by the test device is transmitted. And measuring the reception level by comparing the received test signal with a received test signal. 4. The receiving sensitivity measuring method for a wireless telephone terminal according to claim 1, wherein the receiving level is measured based on whether the test signal received by the wireless telephone terminal is determined to be a pilot signal. A method for measuring the reception sensitivity of a wireless telephone terminal. 5. The receiving sensitivity measuring method for a wireless telephone terminal according to claim 3, wherein after transmitting the test signal, the test apparatus transmits information related to the test signal received by the test apparatus to the wireless telephone terminal. A method for measuring the reception sensitivity of a wireless telephone terminal, comprising transmitting a request signal. 6. A measurement system for measuring the reception sensitivity of a code division multiple access type radio telephone terminal by a test apparatus, the test apparatus comprising: a pilot signal generator for generating a pilot signal; and a pilot signal generator for generating a pilot signal. A combining unit that combines the pilot signal with the noise, a transmitting unit that transmits the combined signal as a test signal to a wireless telephone terminal to be tested, and a test signal that is returned from the wireless telephone terminal that has received the test signal. A receiving sensitivity measuring system for a wireless telephone terminal, comprising a comparing means for comparing the transmitted test signal with a transmitted test signal. 7. A measurement system for measuring the reception sensitivity of a code division multiple access type radio telephone terminal by a test device, wherein the test device generates a pilot signal and generates the pilot signal by the pilot signal generation unit. A combining unit that combines the pilot signal with noise, a transmitting unit that transmits the combined signal as a test signal to a wireless telephone terminal under test, and a wireless telephone terminal that receives the test signal converts the test signal into a pilot signal. A reception sensitivity measurement system for a wireless telephone terminal, comprising: a determination unit that determines whether a reception level is acceptable based on information on a result of the determination. 8. The reception sensitivity measuring system for a wireless telephone terminal according to claim 6, wherein the test device transmits a request signal for requesting the wireless telephone terminal to transmit information on the received test signal. A method for measuring the reception sensitivity of a wireless telephone terminal, the method comprising: 9. The reception sensitivity measuring system for a wireless telephone terminal according to claim 6, wherein the test apparatus includes a noise generation circuit that generates noise to be combined with a pilot signal. A reception sensitivity measurement system for a wireless telephone terminal.