JPH0758667A - Picture data processor with radio and data processor - Google Patents

Abstract

PURPOSE:To easily execute a maintenance diagnosis by a service man by differentiating codes for reference used at the time of transmitting/receiving control data or picture data and at the time of transmitting/receiving data for the maintenance of a processor. CONSTITUTION:In the case of transmitting the picture data and the control data to a personal computer, a CPU 20 transmits the data to a transmission buffer 13 and the data are modulated by a speed spectrum modulator 12 by using a spreading spectrum code outputted by a spread spectrum code generator 14. On the other hand, in the case of transmitting the data used for maintenance and the diagnosis to the personal computer, the CPU 20 transfers the data for the maintenance and the diagnosis to the transmission buffer 18 and the data are modulated by the spread spectrum modulator 17 by using the prescribed spread spectrum code outputted by the spread spectrum code generator 19. Then, in the case of receiving the picture data and the control data from the personal computer, reception signals are respectively inverse-spread in mixers 3 and 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus having a wireless communication function using a spread spectrum communication system.

[0002]

2. Description of the Related Art In recent years, due to revision of laws and regulations, a wireless LAN using a spread spectrum communication system has been proposed. A reader, a printer, and an input / output device such as a digital copying machine are also connected to the LAN.

FIG. 2 is a block diagram for explaining the system, in which personal computers 201, 202, respectively, each equipped with a transmitter / receiver of spread spectrum communication system.
The system includes 203 and a digital copying machine 204 including a spread spectrum communication type transceiver.

Personal computers 201, 202,
The 203 and the digital copying machine 204 can exchange data by communicating and receiving using the same spreading code. For example, files are transferred between personal computers, and image data to be printed and control data such as print commands are sent from the personal computers to the digital copying machine 204.

Generally, a copying machine requires periodic maintenance, and the diagnosis at the time of failure is not simple, and it is desirable to carry out such work using a program such as a personal computer. .

For example, in FIG. 2, a personal computer 205 is used by a service person for maintenance and diagnosis, has a transceiver of spread spectrum communication system, and is used by the service person for maintenance / inspection work. It exists only near the LAN system.

[0007]

In the above configuration, when the data for maintenance or diagnosis is exchanged between the digital copying machine 204 and the personal computer 205, the same spread code is used. When,
It has the following drawbacks.

(1) L the personal computer 205
Since it is incorporated in the AN system, complicated procedures such as address setting and registration in the server are required, and it is necessary to restore the procedure after maintenance and diagnosis, which is complicated. Moreover, this work requires a high degree of knowledge, and the manipulation of the customer's equipment is a serious drawback.

(2) There are various protocols used in the LAN system, and the personal computer 205 needs to have them, and the service person must select which protocol to use.

It is an object of the present invention to provide an image data processing device that allows a service person to easily perform maintenance / inspection work.

[0011]

SUMMARY OF THE INVENTION The present invention is a spread spectrum transmitter / receiver including a code generator for generating a plurality of reference codes.
A receiver having one or more first reference codes used when sending / receiving control data or image data, and one or more first reference codes used when sending / receiving data for maintenance of the device. By using a different code from the reference code of 2, the service person can easily perform the maintenance / inspection work.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Prior to the description of the embodiments of the present invention, the spread spectrum communication system used in this embodiment will be described.

In the spread spectrum communication system, the transmitting side generally uses a spread code such as a pseudo noise code for the baseband signal of the original data such as digitized voice and image data to be transmitted, and is much wider than the original data. Convert to baseband signal with bandwidth. Further, the converted signal is modulated by a method such as PSK or FSK reply,
A high frequency signal is formed and transmitted.

The receiving side demodulates the original data by using the same spreading code as the transmitting side to perform despreading for obtaining correlation with the received signal.

Next, an outline of such spread spectrum communication will be described with reference to FIGS.

On the transmitting side, the original data d (t) input to the multiplier 6-1 of FIG. 3 has the waveform as shown in FIG. 4 and the spectrum of FIG.

The reference signal p (t) which is the other signal input to the multiplier 6-1 has the waveform shown in FIG. 4 and the spectrum shown in FIG. Since the change of the reference code p (t) is much more intense than the change of the original data d (t), the spectrum of FIG. 5 has an extremely wider band than the spectrum of FIG.

Then, the original data d (t) is multiplied by the multiplier 6-
1 is spread by being multiplied by the reference code p (t). The output of the multiplier 6-1 has the waveform of FIG. 4 and, as shown in FIG. 5, has the spectrum of the bandwidth similar to that of FIG. The output signal of the multiplier 6-1 is further mixed in the mixer 6-2 with the carrier wave output from the local oscillator 6-3. The waveform of this carrier is shown in Figure 5.
Shown in.

The output of the mixer 6-2 has the waveform shown in FIG. 4 and the spectrum shown in FIG. 5, and is transmitted from the antenna 6-3.

On the other hand, in the spectrum of the signal received by the antenna 6-5 on the receiving side, various signals are added in addition to the desired signal transmitted by the transmitting side, as shown in FIG. For example, noise or signals sent by other stations,
Alternatively, it is a narrow band interference signal or the like. The received signal including these signals is mixed by the mixer 6-6 with the same reference code p (t) as that on the transmitting side and converted into a signal having the spectrum shown in FIG.

That is, the reference code p in the received signal
The desired signal corresponding to (t) is despread and narrowed to a bandwidth corresponding to the bandwidth of the original data. On the other hand, undesired signals, that is, other station signals that do not have the same reference code, narrow band interference signals, etc. are spread and converted into wide band signals.

The reference codes used for modulation and demodulation are set and assigned so that the mutual correlation is sufficiently small for each communication channel. Therefore, even if the signals spread by different codes are despread and demodulated, they become wide band noise, and only the target signal can be extracted.

The output signal of the mixer 6-6 subsequently has a bandpass filter 6-7 having a bandwidth corresponding to the bandwidth of the original data.
And is converted into a narrow band signal having the spectrum shown in FIG. Further, the narrow band signal is demodulated by a normal PSK or the like by the demodulator 6-8 in FIG. 3 to reproduce the original data.

Next, a first embodiment of the present invention will be described. It should be noted that the system configuration shown in FIG. 2 described above is common to the present embodiment and will be described using the same reference numerals.

FIG. 1 shows the digital copying machine 204 described above.
FIG. 3 is a block diagram showing a configuration of a transmitter / receiver portion in the inside. The details of this embodiment will be described below with reference to FIG.

First, the personal computer 20
A case where image data and control data are transmitted to Nos. 1 to 203 will be described.

In this case, the CPU 20 transmits the image data and control data to the transmission buffer 13. This data is modulated by the spread modulator 12 using a predetermined spread code output from the spread code generator (1) 14.

The modulation output of the spread modulator 12 is modulated by the carrier wave generated by the local oscillator 15 by the mixer 11, and the output of the mixer 11 is transmitted from the antenna 1 via the duplexer 2.

Next, a case where a service person sends data used for maintenance and diagnosis to the personal computer 205 will be described.

In this case, the CPU 20 transfers maintenance and diagnostic data to the transmission buffer 18.

This data is modulated by the spread modulator 19 using a predetermined spread code output from the spread code generator (2) 19. Here, the spreading code output from the spreading code generator 19 is different from the spreading code generated by the spreading code generator 14 described above, and a code having a low cross-correlation is used.

Then, the modulation output of the spread modulator 17 is modulated by the carrier wave generated by the local oscillator 15 by the mixer 16 as described above, and the output of the mixer 16 is shared by the duplexer 2.
Is transmitted from the antenna 1 via the.

Next, the personal computers 201 to 2
A case where image data and control data are received from 03 will be described. The signal received from the antenna 1 is input to the mixer 3 via the duplexer 2.

On the other hand, the spreading code generator (1 ') 5 generates the same spreading code as the above spreading code generator 14, and the desired signal in the received signal is despread by the mixer 3. Here, the method of synchronizing the spread codes on the transmitting and receiving sides and the receiving side is omitted, but synchronization may be achieved by using a convolver, as disclosed in Japanese Patent Laid-Open No. 2-132,935.

The signal despread by the mixer 3 is demodulated by the decoder 7 and converted into digital data. This data is input to the reception buffer 9, and the CPU 20 can read the data.

Next, a case where a service person receives commands and data for maintenance and diagnosis from the personal computer 205 used for maintenance and diagnosis will be described.

The signal received from the antenna 1 is input to the mixer 4 via the duplexer 2. The spread code generator (2 ′) 6 generates the same spread code as the spread code generator 19 described above, and the desired signal in the received signal is despread by the mixer 4. Then, similarly, the data is converted into digital data by the decoder 8 and is sent to the CPU via the reception buffer 10.
20 reads the data.

Personal computers 201 to 203
Has a similar transmitter / receiver, but the spreading code generator 14
Only the same spreading code as is used. In addition, a personal computer 2 used by a service person for maintenance and diagnosis
05 also has a similar transmitter / receiver, but uses only the same spreading code as the spreading code generator 19.

Therefore, the digital copying machine 204 can transmit and receive data to and from the personal computers 201 to 203, and the transmission / reception does not affect the personal computer 205. Hereafter, this is L
It is called AN channel.

Further, since the digital copying machine 204 can send and receive data to and from the personal computer 205, the sending and receiving are performed by the personal computers 201 to 20.
3 is not affected. Hereinafter, this is called a service channel.

Next, according to the flow chart shown in FIG.
The operation of the CPU 20 will be described.

First, in S50, it is determined whether or not data from the service channel has been received. And
If YES, the process proceeds to S51, and processing corresponding to the data from the service channel, for example, maintenance data such as the number of copies is transmitted to the service channel.

When this process is completed, the process proceeds to S52,
It is determined whether or not the data from the next service channel is received. If NO, the process proceeds to S52 again,
If YES, the process proceeds to S51 and the same process as described above is performed.

After that, the loop of S51 and S52 is executed. That is, once the service person receives from the personal computer 205 used for maintenance diagnosis, the digital copying machine 204 thereafter ignores the reception from the LAN channel and performs the operation corresponding to only the reception from the service channel.

On the other hand, if NO in S50, the flow proceeds to S53, where it is determined whether there is received data from the LAN channel. If YES here, the flow proceeds to S54 and the operation corresponding to the received data is performed. For example, if it is a print command, an image corresponding to the data is printed out.
Then, the process returns to S50.

If NO in S53, the process similarly proceeds to S50.

As described above, according to this embodiment,
The service person simply transmits the data using the personal computer 205, the digital copying machine automatically enters the service mode, and the desired work can be performed, and the work can be easily and definitely performed.

Next, FIG. 7 is a block diagram showing a transmitting / receiving portion of a digital copying machine 204 according to the second embodiment of the present invention. The same components as those in FIG. 1 are designated by the same reference numerals. .

Only the points different from FIG. 1 will be described below.

The switch 35 is used by a service person and is turned on for maintenance and diagnosis. The output is input to the input terminal S3 of the CPU 20 via the input line 34.

On the transmission side, the CPU 20 transfers the data to the transmission buffer 13. The spreading code output from the spreading code generator 14 or the spreading signal generator 19 is
Either one is input to the spread modulation period 12 by the selector 31, and the data from the transmission buffer 13 is spread modulated. That is, if the signal on the output line 32 from the output terminal S3 of the CPU 20 is "1", the spread code generator 19
If the output of the above is "0", the output of the spread code generator 14 is selected. Then, the output of the spread modulator 12 is transmitted in the same manner as described above.

Next, on the receiving side, the received signal is received by the antenna 1,
It is input to the mixer 2 via the duplexer 2. Either the output of the spread code generator 5 or the output of the spread code generator 6 is selected by the selector 30 and despread by the mixer 3. After that, it is converted into digital data by the decoder 7,
Data is input to the CPU 20 via the reception buffer 9.

The selector 30 selects the output of the spread code generator 6 when the output line 32 from the CPU 20 is "1", and selects the output of the spread code generator 5 when the output line 32 is "0". ing.

That is, when the output line 32 of the CPU 20 is "0", the above-mentioned personal computer 201 is used.
Up to 203 can be sent / received, and when it is "1", it can be sent / received with the personal computer 205.

Next, using the flowchart of FIG. 8, C
The operation of the PU 20 will be described. First, switch 3 in S60
It is determined whether or not 5 is on. Then, if YES, the maintenance diagnosis is requested by the service person, so the output line 32 is set to "1" in S61. That is, the spreading code on the side of the spreading code generator 19 is selected, and transmission / reception with the personal computer 205 using the same spreading code becomes possible. Next, in S62, the operation corresponding to the received data is performed.

On the other hand, if NO in S60, the normal mode is entered, and the flow advances to S63 to set the output line 32 to "0".
That is, the spreading code on the side of the spreading code generator 1 is selected,
Personal computer 2 using the same spreading code
01/203 can be transmitted / received. Next, in S64, the operation corresponding to the received data is performed.

According to this embodiment, the circuit scale can be reduced as compared with FIG. 1 only by adding the selectors 30 and 31 and the switch 35.

In the above embodiment, one spreading code is used for the service person and one spreading code is used for the original data transmission / reception. Therefore, the data transfer speed may be improved.

Next, a third embodiment of the present invention will be described.

Conventionally, in a processing device that communicates with a plurality of processing devices, when confirming the communication status of the processing devices, in the communication using one channel, each processing device is sequentially processed.
There is a problem that it is necessary to send a command asking for the communication status, and it takes time if the number of processing devices increases. In addition, it was not possible to judge whether the processing device as a communication partner is communicating with another device in a busy state or cannot communicate because it is out of the communicable range.

Therefore, the third embodiment is intended to promptly check the communication status and to judge the communication status of the processing device of the communication partner.

The contents of FIG. 1 and FIGS. 3 to 5 explained in the first embodiment will be explained as being common to the third embodiment. Further, the system configuration of the present invention is, as shown in FIG.
4 and two personal computers 201 and 202 will be described.

First, the operation of the digital copying machine 204 will be described with reference to FIG.

At the time of transmission, the CPU 20 shown in FIG.
Sends image data and control data to the transmission buffer 13. This data is modulated by the spread modulator 12 using a predetermined spread code output from the spread code generator 14. Then, the output of the spread encoder 12 is modulated by the carrier wave generated by the local oscillator 15 by the mixer 11, and the output of the mixer 11 is transmitted from the antenna 1 via the duplexer 2.

The CPU 20 also sends a ready / busy signal indicating the communication state to the transmission buffer 18. This data is modulated by the spread modulator 17 using a predetermined spread code output from the spread code generator 19. Here, the spreading code output by the spreading code generator 19 is different from the spreading code generated by the spreading code generator 14 described above, and a code having a low cross-correlation is used. Then, the output of the spread encoder 17 is modulated by the carrier wave generated by the local oscillator 15 by the mixer 16, and transmitted from the antenna 1 via the duplexer 2 of the mixer 16.

Next, the time of reception will be described. First, in receiving image data and control data, the code received from the antenna 1 is input to the mixer 3 via the duplexer 2.
On the other hand, the spread code generator 5 includes the spread code generator 14 described above.
The same spreading code is generated, and the desired signal in the received signal is despread by the mixer 3.

Although a method of synchronizing the spread signals on the transmitting side and the receiving side is omitted here, for example, Japanese Patent Laid-Open No. 2-1.
As disclosed in Japanese Patent No. 32,935, a convolver may be used for synchronization.

The signal despread by the mixer 3 is demodulated by the decoder 7 and converted into digital data. This data is input to the reception buffer 9, and the CPU 20 can read the data.

Next, the ready / busy signal indicating the communication state is received from the antenna 1 and input to the mixer 4 via the duplexer 2. On the other hand, the spreading code generator 6 generates the same spreading code as the above spreading code generator 19, and the desired signal in the received signal is despread by the mixer 4. The signal despread by the mixer 4 is demodulated by the decoder 8 and converted into digital data. This data is input to the reception buffer 10, and the CPU 20 can read the data.

Further, the personal computers 201, 2
Since 02 has a similar transmitter / receiver, it can transmit and receive data to and from the digital copying machine 204.

Next, the transmission control will be described. Figure 9
It is a flow chart which shows transmission control operation.

In the figure, ch1 is the above-mentioned spread code generator 1
4, ch2 corresponds to transmission using the spread code generator 19. First, when there is a transmission request (S71), if it is being transmitted, a busy signal is transmitted from ch2, and ch1 is transmitted.
To transmit data based on the transmission request (S72). Then, after the communication is completed, a ready signal is transmitted from ch2 (S74). On the other hand, when there is no request for transmission, when a certain time has elapsed (S75), a ready signal is transmitted from ch2 (S74).

FIG. 10 is a flow chart showing the reception control operation. ch1 is the above-mentioned spread code generator 5, ch2
Corresponds to reception using the spread code generator 6. First, the state flag condition is initialized outside the communication range (S81), and the condition flag is set to ready / busy based on the data received by ch2 (S82) (S83 to S85). If no data is received in ch2 for a certain period of time, the condition is set outside the communication range (S86).

Next, in FIG. 11A, the digital copying machine 204 and the personal computers 201 and 202 are
It indicates that it is within the communicable range. Since the digital copying machine 204 does not communicate with the personal computers 201 and 202, the ready signal is set to ch at regular intervals.
Sent from 2. At this time, the personal computers 201 and 202 use the ch2 digital copying machine 204.
It is possible to recognize that is within the communicable range and is in the usable state, and display the communicable machines.

Next, FIG. 11B shows the case where the personal computer 201 and the digital copying machine 204 are communicating with each other. At this time, the digital copying machine 204
Since the busy signal is transmitted from ch2, the personal computer 202 can recognize that the digital copying machine 204 is communicating with another machine by receiving the busy signal on ch2.

Next, FIG. 11C shows that the personal computer 202 has been moved out of the communicable range. At this time, ch of the personal computer 202
In No. 2, since no data is received for a certain period of time, it can be recognized that it is outside the communicable range.

Although omitted here, each signal includes
It is assumed that data for recognizing each machine is added.

Next, a fourth embodiment of the present invention will be described with reference to FIG. On the transmitting side, the CPU 20 sends the image data and control data to the sending buffer 13 for sending. This data is modulated by the spread modulator 12 using a predetermined spread code output from the spread code generator 14. Also, CP
U20 sends a ready / busy signal indicating the communication status to the transmission buffer 18. This data is the spread code generator 19
Is modulated by the spread modulator 17 using a predetermined spread code output by the.

The outputs of the spread modulators 12 and 17 are the multiplier 2
After being multiplied by 1, it is delivered to the mixer 22.
The mixer 22 modulates the carrier wave generated by the local oscillator 23 and outputs the modulated carrier wave, which is transmitted from the antenna 1 via the duplexer 2.

Here, the spreading code output by the spreading code generator 19 is different from the spreading code generated by the above-described spreading code generator 14, and a code having a low cross correlation is used.

The control for confirming and displaying the communication status of the receiving side and the communication partner is the same as in the third embodiment.

Next, a fifth embodiment of the present invention will be described with reference to FIG.
Will be explained.

The fifth embodiment is mainly concerned with the above-described spread spectrum circuit 100, display section (LCD) 101, and C
It is configured to include a PU 102, a ROM 103, and a RAM 104.

After the communication status is judged in the third and fourth embodiments, the judgment result is displayed on the display section 101. For example, if it is out of the communication range, the message "Communication is too far away to communicate" is displayed, and if it is busy, a message "Processing is being performed between other devices" is displayed.

[0085]

As described above, according to the first aspect of the present invention.
According to the above, there is provided a spread spectrum transmitter / receiver including a code generator for generating a plurality of reference codes, a first reference code used when transmitting / receiving control data or image data, and maintenance of the apparatus. By using a different code from the second reference code used when transmitting / receiving the use data, the service technician can easily and definitely perform maintenance diagnosis.

Further, since the operation for maintenance diagnosis cannot be performed by a device other than the service engineer's device, it is desirable from the viewpoint of safety.

Further, according to claim 3 of the present invention, even when there are a plurality of devices as communication partners, the communication state of the communication partner can be quickly confirmed and judged.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a transmitter / receiver according to a first exemplary embodiment of the present invention.

FIG. 2 is a block diagram showing a system configuration example of the first embodiment.

FIG. 3 is a block diagram showing a configuration of a spread spectrum communication device.

4 is a timing chart showing signals of respective parts of the spread spectrum communication device in FIG.

5 is a waveform diagram showing a signal waveform transmitted by the spread spectrum communication device in FIG.

FIG. 6 is a flowchart showing the operation of the first embodiment.

FIG. 7 is a block diagram showing a configuration of a transmitter / receiver according to a second exemplary embodiment of the present invention.

FIG. 8 is a flowchart showing the operation of the second embodiment.

FIG. 9 is a flowchart showing a transmission operation in the third embodiment of the present invention.

FIG. 10 is a flowchart showing a receiving operation of the third embodiment.

FIG. 11 is a block diagram showing a system configuration example of the third embodiment.

FIG. 12 is a block diagram showing a configuration of a transmitter / receiver in a fourth exemplary embodiment of the present invention.

FIG. 13 is a block diagram showing a basic configuration of an apparatus according to a fifth embodiment of the present invention.

[Explanation of symbols]

 1 ... Antenna, 2 ... Duplexer, 3, 4, 11, 16 ... Mixer, 5, 6, 14, 19 ... Spreading code generator, 7, 8 ... Decoder, 9, 10 ... Reception buffer, 12, 17 ... Spreading modulator, 13, 18 ... Transmission buffer, 15 ... Local oscillator, 20 ... CPU.

Claims (5)

[Claims] 1. A spread spectrum transmitter / receiver including a code generator for generating a plurality of reference codes, and one or a plurality of first reference references used when transmitting / receiving control data or image data. Send / receive code and data for equipment maintenance
A wireless image data processing apparatus, wherein a different code is used for one or a plurality of second reference codes used during reception. 2. The wireless image data processing according to claim 1, wherein, when received with the second reference code, operation by the data received with the first reference code is prohibited. apparatus. 3. A data processing device having a transmission / reception means for spread spectrum communication, comprising a plurality of spread codes, normally performing communication using the first spread code, and regarding the busy signal and the ready signal, And a discriminating unit that discriminates a communicable device based on the data obtained by the communication using the second spreading code. Data processing device. 4. The communication means according to claim 3, wherein the communication means transmits a busy signal with a second spreading code when starting communication using the first spreading code,
Means for transmitting a ready signal with the second spreading code when the communication using the second spreading code is completed, and transmitting the ready signal with the second spreading code at regular intervals when the data processing device is in the ready state. And a data processing device. 5. The data processing device according to claim 3, wherein the discriminating unit for discriminating the communicable device classifies the partner device into ready, busy, and out of communication range.