JPH09102766A - Radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily recognize the noises that impaires a radio communication system by adding a means which measures the radio wave intensity of the receiving channels to a system mover together with a means which displays those measured wave intensity of channels. SOLUTION: A radio channel which is shifted to a measurement mode and received by the operation of a specific key is set on a channel shown by a counter after confirming that a system mover is not used for calling, etc. A control part 25 reads the intensity of the radio waves received at a radio trasmitting/receiving part 12 and converted by a D/A converter 14 according to the intensity via the converter 14. Then the received radio wave intensity of the channel that is previously designated is outputted to a display part 24 and shown there. The value read out of the converter 14 is shown at the part 24 in several steps according to the intensity of radio waves. That is, the field intensity is shown at the part 24 in 7 steps and on 89 channels at most in a measurement mode. The part 24 in 7 steps and on 89 channels at most in a measurement mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication system for measuring a radio wave condition in a system installation environment.

[0002]

2. Description of the Related Art Conventionally, there is an electric field strength measuring device as a means for monitoring and measuring the radio wave environment of a place where a cordless telephone system is used. As a simple measuring instrument of this kind, for example, there is one having a configuration as shown in FIG. 5, and this measuring instrument is composed of an antenna 51, a radio receiving section 52 which is a tuner of a PLL system, and a liquid crystal display. Display unit 5
4. The control unit 55 is provided, and the antenna 51 sequentially receives wireless reception channels, and the signal strength output (S meter output) of the tuner is A / D converted by the A / D conversion unit 53. The output is displayed in the form of a graph on the display unit 54.

In a general cordless telephone, the strength of the radio wave during a call is displayed numerically, for example, as shown in FIG. 6, the channel number in use and the strength of the received radio wave are displayed numerically, and the radio wave strength. Is displayed using pictograms such as "strong, medium, weak". In addition, in FIG.
For simplicity, these display examples are shown on one display.

[0004]

However, the measurement of the radio wave environment by the above-mentioned conventional electric field strength measuring device is obtained because the antenna, the position of the antenna, and the receiver are different from those of the actual system. There is a problem that the result may be different from the radio wave condition received by the receiver used in the actual system.

Also, in the field intensity display during a call in a general cordless telephone, only the field intensity of the channel being used for a call or the like can be known, and thus the system is disturbed when it is installed. However, there is a problem that it is not possible to grasp the existence of noise generated by office equipment and the like, intermodulation interference and the like.

The present invention has been made in view of the above problems, and an object thereof is to measure and display radio wave conditions of all channels used for information communication between a fixed device and a mobile device. It is to provide a wireless communication system.

[0007]

In order to achieve the above object, the present invention comprises a fixed machine and a mobile machine, and communicates information between the fixed machine and the mobile machine in a multi-channel access system. A wireless communication system for performing the above, wherein the mobile unit receives radio waves of all channels of the multi-channel, a unit instructing the mobile unit to shift to a specific mode, and the mobile unit According to the specified mode, measuring means for measuring the radio wave intensity of each of all the channels and display means for visually displaying the measurement result in the mobile device are provided.

[0008]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a configuration of a stationary machine of a cordless telephone system according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a line interface unit, which is connected to a communication line and performs network control monitoring such as a dialing function and an incoming call function. A voice processing unit 2 compresses a voice signal coming from a communication line via the line interface unit 1 and compresses the compressed voice signal.
Send to

A control signal modulation / demodulation unit (modem) 4 relays a control signal modulated into a voice band signal to the wireless transmission / reception unit 3 and wirelessly transmits / receives a control signal from a mobile device (described later) included in the received signal. It has a function of relaying to the section 3. 6 is
For example, a control unit including a microprocessor controls and monitors each unit of the cordless telephone system. Further, 7 is a call code storage unit for storing an identification code for specifying the present system or apparatus, and 8 is a display unit for displaying and outputting notification of an incoming call, communication in progress, and the like.

FIG. 2 is a block diagram showing the configuration of a mobile device of the cordless telephone system according to this embodiment. In the figure, 11 is an antenna for receiving or transmitting incoming radio waves, and 12 is a radio transmitting / receiving unit corresponding to the radio transmitting / receiving unit 3 shown in FIG. 1, which receives and demodulates radio waves transmitted by a fixed device. And outputs it as a received voice signal and a control signal to the voice processing unit 13, and at the same time, the voice processing unit 1
The transmission voice signal and the control signal from 3 are modulated, and the modulated signal is emitted as a radio wave through the antenna 11. Further, the wireless transmission / reception unit 12 outputs a voltage according to the intensity of the received radio wave to the D / A converter 14.

Reference numeral 15 is a control signal modulator / demodulator, the function of which is:
This is similar to the control signal modulator / demodulator 4 shown in FIG. 16 is
An amplifier 17 for amplifying the received voice signal is a receiver for converting the amplified voice signal into an audible sound and outputting it.
Reference numeral 19 is an amplifier that amplifies the transmitted voice signal that is input to and output from the transmitter 18. In addition, 2
Reference numeral 0 denotes an incoming call display output unit, which generates a ringing tone when an incoming call is received, and the ringing tone is output via the speaker 21.

Reference numeral 22 is a call code storage unit (memory) corresponding to the call code storage unit 7 shown in FIG. 1, and reference numeral 23 is a key input unit for inputting a dial number, for example, and a specific key operation described later is also performed. , Input from this key input section. Also,
Reference numeral 24 denotes a display (liquid crystal dot matrix) for displaying a dial number or the like input from the key input unit 23 and for displaying a radio wave intensity described later. Further, 25 is a control unit composed of, for example, a microprocessor,
Controls and monitors each part of this mobile unit.

Next, the operation of the mobile device according to this embodiment will be described in detail.

FIG. 3 is a flowchart showing an operation procedure of the mobile device according to the present embodiment. As shown in the figure,
First, in step S1, it is confirmed that the mobile device is not being used for a call or the like, and a specific key operation (for example, pressing a test key (not shown) while pressing the numeric key “1”) causes a measurement mode. Move to. Then, after shifting to the measurement mode, the counter value n is set to n = 1 in step S2.

In step S3, the radio channel to be received is set to the channel indicated by the counter. Subsequent step S
In 4, the control unit 25 reads the intensity of the received radio wave received by the wireless transmission / reception unit 12 and converted by the D / A converter 14 according to the received radio wave intensity via the D / A converter 14. Then, in step S5, the received radio field intensity of the previously designated channel is displayed and output on the display unit 24 by the display method as shown in FIG. Here, D
The value read from the / A converter 14 is displayed in several steps according to the strength of the radio wave. In the case of the display shown in FIG. 4, there are seven levels.

In step S6, it is determined whether or not there is a key operation for canceling the measurement. That is, if the measurement is stopped, the process proceeds to step S9 to end the measurement mode and return the mobile device to the normal state. However, if the measurement is not stopped, the process proceeds to step S7, the counter n is incremented by 1, and it is determined in step S8 whether or not the value of n is the maximum value of the channels to be measured (here, the maximum number of channels is set). Up to 89). When it reaches the maximum value, the process returns to step S2 and the counter is set to the initial value. Otherwise, it returns to step S3 and sets the reception channel to the channel specified by the new counter value.

FIG. 4 is a diagram showing an example of the radio field intensity display method for all channels according to the present embodiment. here,
Normally, numbers and katakana characters are displayed on a display having 20 digits in a 5 * 7 dot matrix, but when the electric field strength is displayed on the display in the measurement mode, the strength can be set in 7 steps. Display up to 89 channels.

As described above, according to the present embodiment, the mobile station of the cordless telephone system has a circuit configuration for measuring the radio field intensity of the channel being received even when the call is not in progress, and the radio waves of a plurality of channels. By providing the circuit configuration for displaying the strength, for example, the existence of radio noise that interferes with the system can be easily and inexpensively grasped, and if the radio interference causes a hindrance to system operation, the cause can be easily investigated.

Further, by performing the radio wave measuring configuration in the radio wave receiving section already operated in the system, unlike the measurement by the usual electric field strength measuring instrument, the intermodulation of the reception and the intermediate frequency image which are suitable for the actual machine are performed. It is possible to grasp the presence or absence of noise such as interference, which is peculiar to the circuit configuration adopted in the receiving circuit of the mobile device.

In the above embodiment, the fixed device is connected to a general communication line, but the present invention is not limited to this.
For example, even if a line interface connectable to a private branch exchange or a main unit of a key telephone system is adopted, the same effect can be obtained.

The present invention may be applied to a system composed of a plurality of devices or an apparatus composed of one device. Further, it goes without saying that the present invention can be applied to the case where it is achieved by supplying a program to a system or an apparatus. In this case, the system or device can enjoy the effects of the present invention by reading the program into the system or device from a storage medium that stores the program represented by software for achieving the present invention. It will be possible.

[0023]

As described above, according to the present invention,
The mobile device of the system is equipped with a means for measuring the radio field intensity of the reception channel, and by providing a means for displaying the radio field intensity of multiple measured channels, it is possible to easily and inexpensively identify the presence of radio noise that interferes with the system. it can.

[0024]

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a stationary machine of a cordless telephone system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a mobile device of the cordless telephone system according to the embodiment.

FIG. 3 is a flowchart showing an operation procedure at the time of measuring radio field intensity.

FIG. 4 is a diagram showing a display output example of radio field intensity.

FIG. 5 is a diagram showing a configuration of a conventional simple radio field intensity measuring device.

FIG. 6 is a diagram showing an example of a radio field intensity display output in a conventional mobile device.

[Explanation of symbols]

 1 line interface 2,13 voice processing unit 3,12 wireless transmission / reception unit 4,15 control signal modulation / demodulation unit 5,11,51 antenna 6,25,55 control unit 7,22 call code storage unit 8,24,54 display unit 14 D / A converter 16 Received voice signal amplifier 17 Received device 18 Transmitter 19 Transmitted voice signal amplifier 20 Incoming call display output unit 21 Speaker 23 Key input unit 52 Wireless receiving unit 53 A / D converter

Claims (5)

[Claims] 1. A wireless communication system comprising a fixed device and a mobile device, wherein information is communicated between the fixed device and the mobile device by a multi-channel access method. Means for receiving radio waves of all channels of the channel; means for instructing the mobile unit to shift to a specific mode; and, in the mobile unit, radio field intensity for each channel of all the channels according to the instructed specific mode. A wireless communication system, comprising: a measuring unit that measures the measurement result; and a display unit that visually displays the measurement result in the mobile device. 2. The wireless communication system according to claim 1, wherein the transmission of radio waves of all channels is performed when there is no normal information communication between the fixed device and the mobile device. 3. The wireless communication system according to claim 1, wherein the display unit displays the measurement result in a graph. 4. The wireless communication system according to claim 3, wherein the display unit is configured by a dot matrix, and the measurement result is displayed in a graph using dots of the dot matrix. 5. The method according to claim 1, wherein the measuring unit measures the radio wave intensity based on an output obtained by analog / digital converting the S meter output of the received radio wave. The wireless communication system according to item 1.