JP2852324B2 - Communication status display device for telephone mobile units - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to monitoring of a reception state of a large-capacity telephone mobile station, and more particularly, to a telephone which monitors a reception state suitable for data transmission / reception such as facsimile communication. The present invention relates to a communication status display device of a mobile device.

2. Description of the Related Art A communication status display lamp is provided on a main body operation panel of a facsimile apparatus connected to a large-capacity telephone mobile device. ing.

[Problems to be Solved by the Invention] However, for example, even if the communication status display lamp indicates that the radio wave state is poor, the mobile phone can be used in a normal state, or the facsimile machine can be used. In some cases, it is possible to receive signals sufficiently to the extent that deterioration in image quality cannot be confirmed. Poor radio wave conditions did not necessarily deny the use of car phones and facsimile machines.

Conversely, even if such a communication status indicator lamp indicates that the radio wave condition is poor, the use of a car phone or a facsimile machine is not denied, so the installation significance of the communication status indicator lamp is being lost. . In particular, according to experiments performed by the inventors of the present application, it has been confirmed that the image quality of the facsimile apparatus does not change when the communication indicator lamp is normally turned on. In addition, it was confirmed that even when the car is traveling in an area free from radio wave obstructions, there is a decrease in image quality when transitioning between relay stations.

SUMMARY OF THE INVENTION The present invention has been made in order to cope with the above situation, and has as its object to provide a communication state display device for a telephone mobile station that monitors a communication state suitable for data transmission and reception such as facsimile communication.

[Means for Solving the Problems] A line control device for a telephone mobile station according to the present invention monitors a reception level in a radio wave reception state by a downlink serial signal from the telephone mobile station, and monitors the reception level at predetermined time intervals. Signal monitoring storage means for storing, and calculating means for determining whether a difference between a plurality of successive reception levels obtained by the signal monitoring storage means is equal to or greater than a predetermined threshold set for a data transmission / reception limit of facsimile communication or the like. And display means for displaying the result of the determination by the calculation means.

[Operation] In the present invention, the reception level in the radio wave reception state is monitored by the signal monitoring and storage unit using the downlink serial signal from the telephone mobile device, and the reception level is stored at predetermined time intervals.
Then, it is determined whether a difference between a plurality of successive reception levels obtained by the signal monitoring storage means by the calculation means is equal to or greater than a predetermined threshold set for a use limit of data transmission and reception such as facsimile communication, and the like. The judgment result is displayed on the display means.

Therefore, the arithmetic means compares the difference between a plurality of successive reception levels obtained by the signal monitoring and storage means, and when the difference between the reception levels is equal to or greater than a predetermined threshold, an error is included in the communication data. indicate.

[Example] Here, an example of the present invention will be described.

FIG. 1 is an overall configuration diagram of a communication status display device of a telephone mobile device according to one embodiment of the present invention, and FIG. 2 is a diagram showing a display panel of the communication status display device of the telephone mobile device of one embodiment of the present invention. It is a principal part top view.

In the figure, the present embodiment is a facsimile apparatus 60 to which a handset 2 as a telephone apparatus is connected, and furthermore, via a mobile telephone 1 of the present embodiment, one communication line of a commercial telephone network, telephone communication and It performs facsimile communication. A line controller (hereinafter referred to as "NCU" at the end) 10 normally has a mobile phone 1 and a handset 2 connected to each other, and operates the switch 38 to operate the mobile phone 1, the communication controller 30 and the printer. A connection with a facsimile device 60 including a & scanner 50 is established.

The mobile telephone 1 as a telephone according to the present embodiment is constituted by a known radio transceiver. The handset 2 includes a handset and the like when the apparatus of this embodiment is used as a telephone, and is a known mobile telephone.

More specifically, the overall configuration of the facsimile apparatus 60 is the same as that of a conventional office facsimile apparatus except that the power supply circuit 41 is supplied with power from the vehicle battery 3. For the embodiment of the present invention, a communication control circuit (CPU) 33 including a microcomputer of the communication controller 30 stores a program for performing a line connection request operation described later.

The facsimile device 60 includes the NCU 10, the communication controller 30
And a printer & scanner 50.

The NCU 10 has an audio signal line 17R (reception) as well as an audio signal line 17S (transmission) and its switching relays 14, 15 and AMP11, PAD12, a relay driver (RD) 21, a power supply as well as an audio signal line 17S (transmission) as in a general office facsimile machine. &CPU
A monitoring device 20 and a serial signal line 18S (transmission) and a serial signal line 18R (reception) for controlling the mobile phone, and the serial signal line 18 from the mobile phone 1 are provided.
A line connection control circuit 13 that also functions as a signal monitoring storage unit that identifies the reception level in the radio wave reception state by the R serial signal and stores the reception level at predetermined time intervals, Is the switching relay 14,1
It outputs the signal for 5 relay control. The line connection control circuit 13 is formed of a microcomputer, and incorporates a program constituting a signal monitoring storage unit described later.

Further, the communication controller 30 of the facsimile machine 60 of the present embodiment is configured as follows.

The model 31 is a modem that modulates and demodulates a digital signal using a carrier in a known audio frequency range. The communication control circuit 33 is a circuit for program-controlling the facsimile device 60 composed of a microcomputer or the like, and incorporates a program constituting an arithmetic unit described later.

The ROM 34 is added as an extended memory, and is a memory in which a program for controlling the communication control circuit 33 is stored. The RAM 35 receives the signal of the communication control circuit 33,
It is a readable and writable memory that directly stores image data from the model 31. The encoding / decoding circuit 36 directly stores the image data from the modem 31, transfers and stores the image data temporarily stored in the RAM 35, and outputs it to the line memory 37 as line data of a predetermined paper length. It has. The line memory 37 stores the data stored in the encoding / decoding circuit 36, and stores the stored data in one line.
The data is output as 8-bit parallel data for each row.

In the display circuit 39, as shown in the front view of the main part of the display unit in FIG. 2, the communication switch 38 displays the words "start", "stop", and "copy", and uses the embodiment of the present invention. Possible display 39a and unavailable display 39b are "usable",
"Unavailable" is displayed, and "communication", "paper supply", and "error" are displayed.

The power supply circuit 41 receives power from the vehicle battery 3 and converts the power into various constant voltages. Communication switch 38 and communication control circuit 33 that are operated when transmitting a document, document sensor
The power supply control circuit 42 supplies various constant voltages from the power supply circuit 41 to the respective components via 52 and the like.

The communication control circuit 33 receives signals from a communication switch 38 and a manual / automatic reception switch 40 for switching between manual reception and automatic reception. The signal received by the mobile telephone 1 is transmitted to a vehicle handset. This function is used to set a function that can be received without the intervention of the facsimile machine 2, for example, when the occupant is not present.

Further, the printer & scanner 50 of the facsimile apparatus 60 of the present embodiment is configured as follows.

The sensor interface gate array 71 is for controlling printing of the thermal head 55, and outputs serial data to the thermal head 55 that prints parallel data on thermal paper. The thermal head controller 58 supplies power to the thermal head 55 and controls printing. The paper feed motor 54 is a pulse motor that feeds the thermal paper one line at a time, and is driven via a motor driver 57. The image sensor 56 for reading a document is input to the sensor interface gate array 71 via the binarization circuit 59.

The components of the printer & scanner 50 are controlled by the print reading control circuit 51. Since the control methods are known and have no direct relation to the gist of the present invention, A detailed description thereof will be omitted.

The line connection control circuit 13 of the NCU 10 of the present embodiment, the communication controller 30 of the facsimile device 60, and the printer & scanner
The reference numeral 50 transmits and receives a known signal as described below in relation to the above components.

When the power is turned on, the line connection control circuit 13 of the NCU 10 performs line connection control, and the communication control circuit 33 of the communication controller 30 performs a line connection request operation.

That is, the line connection control circuit 13 initializes the internal memory when the power is turned on, and outputs a signal to the output port when waiting (no communication, waiting for command). As a result, both the switching relays 14 and 15 are non-conductive, and they are connected to the handset 2 shown in FIG. The line connection control circuit 13 has a line request signal from a commercial telephone line via the mobile telephone 1 and enters a so-called standby state of the line connection control circuit 13.

At this time, the line connection control circuit 13 receives the sign of the reception level data in the radio wave reception state and the reception level via the serial signal line 18R from the mobile telephone 1.

Incidentally, the identification of the reception level data included in the downlink serial signal is as follows. "1100" means the reception level data, and "X3 X2
"X1 X0" means the reception level, and "X3 X2
X1 X0 " Is divided into 16 areas.

Next, control operations of the line connection control circuit 13 and the communication control circuit 33 in the communication state of the communication state display device of the telephone mobile device according to the embodiment of the present invention will be described.

The basic operation of the communication control circuit 33 is as shown in the flowchart of FIG. 3 of the line connection control circuit 13 of the NCU 10 of the communication status display device of the telephone mobile unit according to the embodiment of the present invention.

Initialize in step S1, handset 2 in step S2
Is input to the line connection control circuit 13 of the NCU 10 and signal processing is performed so as to be transmitted as an uplink serial signal from the serial signal line 18S. Further, in step S3, the downstream serial signal of the serial signal line 18R from the mobile phone 1 is taken into the line connection control circuit 13. In the downstream serial signal of the serial signal line 18R taken in step S4,
If the code of the reception level data exists, and if it exists, the reception level of the reception level data is stored in a memory incorporated in the line connection control circuit 13 in step S5.

In step S6, the signal fetched from the handset 2 in step S2 is processed and sent out from the serial signal line 188 as an uplink serial signal. In step S7, a signal is output to the communication control circuit 33 of the handset 2 or the communication controller 30 of the facsimile apparatus 60 in accordance with the down-serial signal of the serial signal line 18R taken into the line connection control circuit 13 from the mobile telephone 1.

In step S8, it is determined whether or not it is the transmission timing for transmitting the reception level to the communication control circuit 33 of the communication controller 30, and at the transmission timing, the reception level stored in the memory is called in step S9, and it is called in step S10. It is sent to the communication control circuit 33 of the communication controller 30. If it is not the transmission timing for transmitting the reception level in step S8, the processing in steps S9 and S10 is avoided.

In step S11, the switching relays 14 and 15 are connected to the facsimile machine.
Judge whether it is connected to the 60 side, and mobile phone 1
When the facsimile device 60 is not in the connected state, it is determined in step S12 whether or not there is a line request signal from the facsimile device 60 side.
The routine from step S2 to step S12 is repeatedly executed. Further, when there is a line request signal from the facsimile machine 60 in step S12, the switching relays 14, 15 are sent in step S13.
The mobile telephone 1 and the facsimile device 60 are connected by the relay switching control signal.

Then, in the next process, in step S11, the switching relays 14, 15
Is determined to be connected to the facsimile device 60 side, it is determined in step S14 whether the line request signal is continued from the facsimile device 60 side, when it is continued,
The routine from step S2 to step S11 and step S14 is repeatedly executed.

While repeatedly executing the routine of steps S2 to S11 and step S14, if it is determined in step S14 that the line request signal has disappeared from the facsimile device 60, the relay switching control of the switching relays 14 and 15 is performed in step S15. The mobile phone 1 and the handset 2 are returned to the connected state by the use signal, and the process returns to the routine from step S2.

Note that the processes of steps S2 and S3, and steps S6 and S7 in this routine are known, and therefore detailed description thereof is omitted.

Next, the basic operation of the communication control circuit 33 is as shown in the flowchart of the communication control circuit 33 of the communication state display device of the telephone mobile device according to the embodiment of the present invention shown in FIGS.

First, initialization is performed in step S21, the reception level transmitted from the line connection control circuit 13 is acquired in step S22, and the reception level acquired last time is compared with the reception level acquired this time in step S23. The received level is subtracted from the received level, and the difference is calculated. In step S24, it is determined whether or not the difference between the successive reception levels is equal to or greater than a predetermined threshold set for the use limit of the facsimile apparatus 60. Then, when the reception level difference is less than the threshold value of the use limit of the facsimile device 60, the usable display 39a is turned on as the facsimile device 60 can be used under preferable conditions in step S25, and the reception level difference is the use limit value of the facsimile device 60. If not less than the threshold, step S26
, The use-disabled display 39b is turned on because the use of the facsimile device 60 is not preferable. Then, it is determined in step S27 that the communication switch 38 is on, and the processing of the routine from step S22 to step S27 is continued until it is determined that the communication switch 38 is on, and whether the facsimile device 60 can be used is determined. Is displayed.

If the communication switch 38 is turned on in step S27, it is determined in step S28 whether there is a document on the document table.If there is no document, it is determined that the reception mode has been selected, and a line request is sent to the NCU 10 in step S29. Output a signal,
The facsimile reception routine is executed in steps S30 and S31, the end signal is determined on the audio signal line 17R, and the processing of the routine in steps S30 and S31 is continued until the end signal is determined on the audio signal line 17R. The facsimile reception routine includes:
Since this is a known receiving operation, its description is omitted.

When the end signal is determined by the audio signal line 17R in step S31, the line connection control circuit of the NCU 10 is determined in step S36.
The line request signal to 13 is released, and the processing of the routine from step S22 is repeated.

On the other hand, if it is determined in step S27 that the communication switch 38 is ON, and if it is determined in step S28 that there is a document on the document table, it is determined that the transmission mode has been selected and step S3 is performed.
In step 2, a line request signal is output to the NCU 10, a facsimile transmission routine is executed in steps S33 and S34, and the processing of the routines in steps S33 and S34 is continued until the line is exhausted. If it is determined in step S34 that there is no more document on the document table, an end signal is sent out on the audio signal line 17S in step S35, and the line request signal to the NCU 10 is released in step S36, and step S22
Repeat the processing of the routine from. Since the facsimile reception routine is a known transmission operation, its description is omitted.

As described above, the communication state display device of the telephone mobile unit according to the embodiment of the present invention monitors the reception level of the radio wave reception state based on the downlink serial signal from the automatic telephone mobile unit 1, and checks the reception level every predetermined time. The signal monitoring and storage means by the processing of the steps S5 and S6 performed by the line connection control circuit 13 performed by the line connection control circuit 13, and a difference between a plurality of successive reception levels is equal to or less than a predetermined threshold set for the use limit of the facsimile apparatus 60. The operation controller 39 of the communication controller 30 determines whether the operation is performed by the communication control circuit 33. The operation is performed by the processing of the routine from step S22 to step S26, and the enable display 39a and the disable display 39b are displayed to display the determination result of the operation means. Means.

Therefore, the signal monitoring and storage means constantly monitors the reception level in the radio wave reception state by the downlink serial signal from the mobile phone 1 and stores the reception level at predetermined time intervals, so that the signal monitoring and storage occurs irregularly. The reception level for determining the radio wave state is stored in the memory, and is transmitted to the communication control circuit 33 of the line controller 30 at a predetermined timing. The reception level for judging the state of the radio wave received from the line connection control circuit 13 at a predetermined timing is calculated by the calculating means of the communication control circuit 33 by calculating the difference between two successive reception levels, and calculating the calculated reception level. Determine whether the level difference is equal to or greater than a predetermined threshold set in the use limit of the facsimile device 60, and when the reception level difference is equal to or greater than the predetermined threshold set in the use limit of the facsimile device 60, use the facsimile device 60. Also, it is determined that the image quality cannot be compensated, and the unusable display 39b as the display means can be turned on.

As a result, even if it is necessary to use the facsimile device 60 while the car is traveling in an area where the relay station needs to be changed, the switching timing of the relay station can be confirmed by the unusable display 39b. Even if an image is being transmitted by transmission, an unusable display appears on the way.
When b is lit, it is determined that the image quality on the receiving side is not good, and the image can be retransmitted. When the unusable display 39b is turned on during image reception, it is not necessary to check the received document, and it is determined that the received image quality is not good, and the reproduction can be requested.

Further, in particular, according to experiments performed by the inventors of the present application, it has been confirmed that even when the reception level is continuously reduced, the facsimile signal can be normally transmitted and received, and when the reception level changes suddenly, the image quality changes suddenly. Was. Therefore, when the communication status display lamp is turned on, it is confirmed that a change occurs in the image quality, and the reliability of the display of the communication status can be improved.

By the way, as the signal monitoring and storage means for monitoring the reception level in the radio wave reception state by the downlink serial signal from the telephone mobile station of the above-described embodiment and storing the reception level at predetermined time intervals, the signal from the mobile telephone mobile station 1 is used. The reception level in the radio wave reception state is monitored by the downlink serial signal, and the reception level is monitored at predetermined time intervals. However, when practicing the present invention,
The mobile phone 1 is not limited to a mobile phone, but can be used for a mobile phone such as a mobile phone. The communication device connected to the telephone mobile device is not limited to the facsimile device, but can be used for general communication devices that transmit and receive data, such as personal computer communication.

The calculating means for determining whether the difference between a plurality of successive reception levels in the above embodiment is equal to or greater than a predetermined threshold set in the usage limit is based on the difference between the plurality of successive reception levels used by the facsimile apparatus 60. The communication controller 30 of the communication controller 30 that determines whether or not the threshold value is equal to or less than a predetermined threshold value is a means based on a routine process from step S22 to step S26. However, when implementing the present invention, the threshold value of the reception level difference can be a predetermined threshold value according to the type of the data communication device to be used. At this time, the reception levels to be compared are two reception levels. However, a requirement for judging a plurality of reception levels and estimating a communication state from now on can be added.

The display means for displaying the determination result of the arithmetic means in the above embodiment comprises a usable display 39a and a non-usable display 39a. However, when implementing the present invention, only one of the usable display 39a and the unusable display 39b can be provided. Also, audible display means can be provided alongside the visible display means. Alternatively, it may be audible display means.

Further, the signal monitoring storage means and the arithmetic means of the above embodiment are
Signal monitoring and storage means performed by the line connection control circuit 13 on the NCU 10 side, and a communication controller constituting the facsimile apparatus 60
Although the calculation means by the communication control circuit 33 of 30 is used,
In practicing the present invention, reception level data is monitored by a downlink serial signal from a telephone mobile station, the reception level is stored at predetermined intervals, and the difference between the reception levels before and after the reception level is set to the usage limit. As a means for determining whether the value is equal to or greater than the predetermined threshold value, a circuit such as a single microcomputer may be used. Further, the storage interval can be set arbitrarily according to the type of the telephone mobile device and the environment in which it is used.

[Effects of the Invention] As described above, the communication state display device of the telephone mobile device of the present invention monitors the reception level of the radio wave reception state by the signal monitoring storage unit using the downlink serial signal from the telephone mobile device, and The reception level is stored for each time, and it is determined whether a difference between the reception levels before and after the reception level is equal to or more than a predetermined threshold set as a usage limit by the calculation means, and the determination result of the calculation means is displayed on the display means. is there.

Therefore, when the received signal level changes suddenly during data transmission and reception, a data transmission error such as image quality occurs. By displaying this fact, it is easy to confirm the possibility of a change in image quality, and the communication status is improved. Reliability can be improved.

Therefore, it is possible to confirm whether or not data transmission / reception is possible by displaying, particularly while moving between relay stations where the possibility of occurrence of data transmission / reception abnormality is high. If there is a display indicating that the communication state is not good, it is possible to determine that the image quality on the receiving side is not good and resend the image. Further, when the display is displayed during the image reception, it is possible to request retransmission without confirming the received document and determining that the received image quality is not good.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a communication status display device of a telephone mobile device according to one embodiment of the present invention, and FIG. 2 is a plan view of a main part of a display panel of the communication status display device of the telephone mobile device of one embodiment of the present invention. FIG. 3 is a flow chart of a line connection control circuit of a communication status display device of a telephone mobile unit according to one embodiment of the present invention. FIGS. 4 and 5 are communication statuses of a telephone mobile unit according to one embodiment of the present invention. 5 is a flowchart of a communication control circuit of the display device. In the figure, 1: mobile phone mobile phone 2: handset 10: line control unit (NCU) 13: line connection control circuit 18R: downlink serial signal 18S: uplink serial signal 30: communication controller 33: communication control circuit 60: facsimile machine is there. In the drawings, the same reference numerals and symbols indicate the same or corresponding parts.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04B 7/26 H04N 1/00

Claims (1)

(57) [Claims] 1. A signal monitoring and storage means for monitoring a reception level in a radio wave reception state by a downlink serial signal from a telephone mobile station and storing the reception level at predetermined time intervals, wherein a difference between successive reception levels is: A communication status display device for a telephone mobile station, comprising: a calculation stage for determining whether or not the threshold value is equal to or greater than a predetermined threshold set as a usage limit; and a display unit for displaying a determination result of the calculation unit.