JPH11146031A - Communication processor, method therefor and computer-readable recording medium storing control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the interruption of communication. SOLUTION: A communication processing section 102 records a detected communication error and parameter error every time the communication error and the parameter error are detected from reception data. Then the recorded communication error and parameter error are analyzed, and revision of a communication condition is decided based on the result of analysis, then the communication condition is revised.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication processing apparatus and method, and a computer-readable recording medium on which a control program is recorded.

[0002]

2. Description of the Related Art In recent years, there has been known a system capable of transmitting print data from a host computer to a peripheral device such as a printer using infrared rays, and transmitting data from the peripheral device to the host computer. In such communication, at the start of communication, communication conditions referred to as negotiation are negotiated, optimal communication parameters are determined by the respective communication processing devices, and communication is performed based on the determination result.

[0003] Such a procedure will be described with reference to FIG. When the communication station A performs the discovery procedure of the communication station B, the communication station B
Sends a communication station discovery response to communication station A. Next, when the communication station A presents the communication parameters to the communication station B, the communication station B presents the communication parameters to the communication station A. Data is transmitted and received between the communication stations A and B based on the communication parameters. Then, when the communication station A performs a communication end procedure, the communication station B sends a communication end response to the communication station A.

[0004]

As described above, once the communication parameters are determined, they are not usually changed, so that if the communication condition is not satisfied during the communication, the communication itself is interrupted. Was. In particular, in wireless communication, since the communication state often changes according to the surrounding conditions, a communication error frequently occurs, and finally the communication is interrupted.

An object of the present invention is to provide a communication processing apparatus and method capable of solving the above problems and preventing communication interruption, and a computer-readable recording medium recording a control program. It is in.

[0006]

According to the first aspect of the present invention, there is provided a detecting means for detecting a communication error and a parameter error from received data, a recording means for recording the communication error and the parameter error detected by the detecting means, Analyzing means for analyzing communication errors and parameter errors recorded by the recording means; first changing means for changing communication conditions when a change in communication conditions is determined in accordance with an analysis result by the analyzing means; Notification means for notifying the data transmission source of the communication condition changed by the first change means.

According to a second aspect of the present invention, there is provided a detecting means for detecting a communication error and a parameter error from received data, a recording means for recording the communication error and the parameter error detected by the detecting means, and a recording means for recording the communication error and the parameter error. Analyzing means for analyzing the communication error and the parameter error, and determining a change in the communication condition based on the analysis result by the analyzing means, and further, when an acknowledgment of the communication condition change is obtained from the data source, the communication condition is changed. And second changing means for changing

[0008] According to claim 1 or 2, a notifying means for notifying a change in the communication condition can be further provided.

According to the first or second aspect of the present invention, it is possible to further comprise a periodic notifying means for periodically notifying the data transmission source of the communication error and the parameter error recorded by the recording means.

[0010] In the first aspect, the first changing means can determine the change of the communication condition when the communication error and the parameter error exceed a predetermined number of errors.

[0011] In the second aspect, the second changing means can determine the change of the communication condition when the communication error and the parameter error exceed a predetermined number of errors.

[0012] In the second aspect, the second changing means can transmit the recorded communication error and the parameter error to the data transmission source when the communication condition is determined to be changed.

According to the present invention, each time a communication error and a parameter error are detected from the received data, the detected communication error and the parameter error are recorded, and the recorded communication error and the parameter error are analyzed. And a step of changing a communication condition when a change of the communication condition is determined based on the analysis result;
Notifying the data transmission source of the changed communication condition.

According to a ninth aspect of the present invention, every time a communication error and a parameter error are detected from received data, the detected communication error and the parameter error are recorded, and the recorded communication error and the parameter error are recorded. An analysis step and a step of determining a change in communication conditions based on the analysis result and changing the communication conditions when an acknowledgment of the change in communication conditions is obtained from the data transmission source.

[0015] According to a tenth aspect of the present invention, a recording medium causes a computer to detect a communication error and a parameter error from received data, record the detected communication error and the parameter error, and analyze the recorded communication error and the parameter error. When a change in the communication condition is determined based on the analysis result, a control program is recorded which changes the communication condition and notifies the data transmission source of the changed communication condition.

The recording medium of claim 11 causes a computer to detect a communication error and a parameter error from received data, record the detected communication error and the parameter error, and analyze the recorded communication error and the parameter error. A control program is characterized in that a change in the communication condition is determined based on the analysis result, and the communication condition is changed when a positive response to the change in the communication condition is obtained from the data transmission source.

[0017]

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

<First Embodiment> FIG. 1 shows an embodiment of the present invention. This is an example of an inkjet printer capable of infrared communication. In FIG. 1, reference numeral 101 denotes an infrared port, which converts an optical signal received by the infrared light receiving unit into an electric signal. Reference numeral 102 denotes a communication processing unit which detects a communication error and a parameter error from data received via the parallel port 100 or the infrared port 101, stores the detected communication error and the parameter error in a storage area, Analyzes communication errors and parameter errors stored in the server, determines the change of communication conditions according to the analysis result, changes the communication conditions when the change of communication conditions is determined, and transmits the changed communication conditions to the data source. Is to be notified. Communication processing unit 10
The error information stored in the second storage area includes errors in all layers from an error relating to the reception of an optical signal occurring in the lowermost layer to a protocol error occurring in the uppermost layer. The layers include a physical layer, an infrared link layer, an infrared link multiplex layer, a data flow control layer, and a port emulation layer from the bottom layer to the top layer. Reference numeral 103 denotes a reception buffer for temporarily storing print data obtained via the communication processing unit 102. An analysis unit 104 analyzes print data stored in the reception buffer 103 based on a communication protocol and confirms the data. A print processing unit 105 performs a print process.

In the ink jet printer configured as described above, when the connection mode is established using infrared light, the optical signal received by the infrared light receiving section of the infrared port 101 is converted into an electric signal, and the obtained electric signal is converted. The signals are sequentially stored in the reception buffer 103, the data in the reception buffer 103 is analyzed by the analysis unit 104 based on the communication protocol, the data is confirmed, and the print processing is performed on the data by the print processing unit 105.

Since essentially the same processing is performed on print data supplied via the parallel port, the description is omitted.

FIG. 2 is a flowchart showing an example of a communication processing procedure by the communication processing unit 102 in FIG. 1 when the connection mode is established using infrared rays. Infrared port 1
Every time a communication error and a parameter error are detected from the data received via the data area 01, the counter for each error type in the storage area is incremented (S20).
1). For example, whenever a data size over error occurs with respect to the communication data size established by negotiation during communication, the data size over counter of the storage area is incremented separately from the processing of the communication standard.
Table 1 shows an example of data stored in the storage area.

[0022]

[Table 1]

Then, the communication error and the parameter error stored in the storage area are analyzed (S202). For example, when this counter exceeds a predetermined set value, it is determined that a specific error has occurred, and when it is determined to change the communication condition (S203), the communication condition is changed (S20).
4) The changed communication condition and the communication error and the parameter error stored in the storage area are notified to the data transmission source (S205).

Therefore, even if an error occurs frequently, communication is continued without interruption. When the transmission condition is changed, the fact may be displayed to notify the operator.

The communication error and the parameter error stored in the storage area may be notified not only to the transmission source when notifying the changed communication condition but also to the transmission source periodically.

<Second Embodiment> FIG. 3 shows the communication processing unit 1 of FIG. 1 when the connection mode is established using infrared rays.
13 is a flowchart illustrating an example of a communication processing procedure according to a second embodiment.

The present embodiment differs from the first embodiment in the method of changing the communication conditions. That is,
In the first embodiment, the communication condition is changed when the change of the communication condition is determined based on the result of analyzing the communication error and the parameter error.

On the other hand, in the present embodiment, the change of the communication condition is determined based on the result of analyzing the communication error and the parameter error (S203), and an acknowledgment of the change of the communication condition is obtained from the data source. (S
304), the communication condition is changed (S305). When a change in communication conditions is determined, the recorded communication error and parameter error are transmitted to the data transmission source.

The functions described in the first embodiment allow a computer to detect communication errors and parameter errors from received data, record the detected communication errors and parameter errors, and record the recorded communication errors and parameter errors. Is analyzed, when the change of the communication condition is determined based on the analysis result, from the computer-readable recording medium that records the control program to change the communication condition and notify the changed communication condition to the data transmission source, It can also be realized by reading and executing by a computer.

The functions described in the second embodiment allow a computer to detect communication errors and parameter errors from received data, record the detected communication errors and parameter errors, and record the recorded communication errors and parameter errors. And a computer-readable recording which records a control program for changing the communication conditions when a change in the communication conditions is determined based on the analysis result and a positive response to the change of the communication conditions is obtained from the data source. It can also be realized by a computer reading and executing the medium.

In this case, the program code itself read from the storage medium realizes the novel function of the present invention, and the computer-readable storage medium storing the program code constitutes the present invention. .

The functions of the first and second embodiments can be realized not only by executing the program code read out by the computer, but also by operating an OS (operating system) or the like in accordance with the instruction of the program code. It can also be realized by performing part or all of the actual processing.

Further, the functions of the first and second embodiments are such that a program code read from a computer-readable storage medium is stored in a function expansion board inserted into a computer or a function expansion board connected to a computer. After being written into the memory provided in the unit, the CPU (central processing unit) provided in the function expansion board or function expansion unit is operated based on the instructions of the program code.
t) etc. can also be realized by performing part or all of the actual processing.

As a computer-readable storage medium for supplying the program code, for example, a floppy disk, hard disk, optical disk, magneto-optical disk, CD-R0M (compact disk read only memory)
y), CD-R (compact disk recordable), magnetic tape, nonvolatile memory card, R0M (read only memor)
y), etc. can be used.

[0035]

As described above, according to the present invention,
With the configuration described above, interruption of communication can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating an example of a processing procedure performed by a communication processing unit 102 illustrated in FIG.

FIG. 3 is a flowchart illustrating an example of a processing procedure performed by a communication processing unit 102 according to the second embodiment of the present invention.

FIG. 4 is a diagram illustrating an example of a communication sequence.

[Explanation of symbols]

 Reference Signs List 100 parallel port 101 infrared port 102 communication processing unit 103 reception buffer 104 analysis unit 105 print processing unit

Claims (11)

[Claims] 1. A detecting means for detecting a communication error and a parameter error from received data, a recording means for recording a communication error and a parameter error detected by the detecting means, and a communication error and a parameter recorded by the recording means Analysis means for analyzing an error; first change means for changing the communication condition when a change in the communication condition is determined in accordance with the analysis result by the analysis means; and communication condition changed by the first change means. A communication processing device comprising: a notification unit that notifies a data transmission source. 2. A detecting means for detecting a communication error and a parameter error from received data, a recording means for recording the communication error and the parameter error detected by the detecting means, and a communication error and a parameter recorded by the recording means. Analyzing means for analyzing the error; determining a change in the communication condition based on a result of the analysis by the analyzing means; and changing the communication condition when a positive response to the change in the communication condition is obtained from the data transmission source. A communication processing device comprising: a changing unit. 3. The communication processing apparatus according to claim 1, further comprising a notifying unit for notifying a change in a communication condition. 4. The communication processing apparatus according to claim 1, further comprising a periodic notification unit for periodically notifying a data transmission source of a communication error and a parameter error recorded by said recording unit. . 5. The communication processing apparatus according to claim 1, wherein the first change unit determines a change in communication conditions when the number of communication errors and parameter errors exceeds a predetermined number of errors. 6. The communication processing apparatus according to claim 2, wherein the second change unit determines a change in communication condition when the communication error and the parameter error exceed a predetermined number of errors. 7. A communication process according to claim 2, wherein said second change means transmits the recorded communication error and parameter error to a data transmission source when a change in communication conditions is determined. apparatus. 8. Whenever a communication error and a parameter error are detected from received data, a step of recording the detected communication error and the parameter error, a step of analyzing the recorded communication error and the parameter error, and an analysis result A communication processing method, comprising: a step of changing a communication condition when a change of a communication condition is determined based on a communication condition; and a step of notifying the changed communication condition to a data transmission source. 9. Whenever a communication error and a parameter error are detected from the received data, recording the detected communication error and the parameter error; analyzing the recorded communication error and the parameter error; Determining a change in the communication condition based on the analysis result, and changing the communication condition when an affirmative response to the change in the communication condition is obtained from the data transmission source. 10. A computer that detects a communication error and a parameter error from received data, records the detected communication error and the parameter error, analyzes the recorded communication error and the parameter error, and sets a communication condition based on the analysis result. Is decided to change,
A computer-readable recording medium storing a control program, wherein a communication condition is changed, and the changed communication condition is notified to a data transmission source. 11. A computer which detects a communication error and a parameter error from received data, records the detected communication error and a parameter error, analyzes the recorded communication error and the parameter error, and sets a communication condition based on the analysis result. A computer-readable recording medium having recorded thereon a control program for determining a change in the communication condition and changing the communication condition when an acknowledgment of the change of the communication condition is obtained from the data transmission source.