JPH08102740A - Radio communication system - Google Patents

Abstract

PURPOSE: To provide a radio communication system that can quickly select the available one of plural master stations at the side of a slave station. CONSTITUTION: A slave station exchanges the message information on its own identification information, address and comment information with those of each master station at each fixed time under the control of a control part 18 and via a radio transmission/reception part 13. Then the slave station stores the message information received from each master station in a RAM 17 and deletes the message information on such a master station where the exchange of the new message information is impossible even after a fixed time out of the RAM 17. The information showing the master station that can transmit the latest data is displayed at a display part 12 under the control of the part 18 and based on the message information stored in the RAM 17. Then a master station to receive the data is selected based on the input given from an operation part 11.

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 such as a wireless local area network (LAN) system using a wireless communication device.

[0002]

2. Description of the Related Art In recent years, a plurality of groups each including a plurality of slave stations that wirelessly transmit data to a master station and a master station that outputs data received from each slave station have been provided. There is used a wireless communication system in which data can be wirelessly transmitted from the child station and the parent station receiving the data can output the data.

For example, a printer side shared by a plurality of users is assigned to a master station, and a group is formed so that the printer side and the personal computer (PC) side which is a plurality of slave stations can perform wireless communication. A plurality of such groups are provided, an n: n parent-child communication network is constructed within each group, and each printer freely uses any printer.

Conventionally, when such a wireless system is used, an operator sets an address of his own station by using a changeover switch such as a DIP switch on the printer side to be used, and an output destination address of the printer is designated from a PC to specify data. Was being output.

[0005]

However, in the conventional wireless communication system, when the output destination address of the printer is specified, the output destination address must be confirmed by going to the installation location of the printer and checking the setting contents of the DIP switch. It had to be inefficient.

Therefore, there is a problem that it takes time for the slave station to select an available master station from a plurality of master stations. There is also a problem that it is difficult for the slave station to select a master station with a good communication condition. Furthermore, since the usage rights of the parent station are on a first-come-first-served basis, if there is a conflict between the child stations, there is a problem that the processing of the child station that should be preferentially performed is postponed.

The present invention has been made in view of the above points, and it is an object of the present invention to enable a slave station to quickly select an available master station from a plurality of master stations. It is also an object to allow the slave station side to easily select a master station with a good communication state. Furthermore, it is also an object to be able to assign a priority order when using the master station to each slave station.

[0008]

In order to achieve the above object, a wireless communication system of the present invention has a plurality of slave stations having means for wirelessly transmitting data to a master station, and data received from each slave station. It is possible to provide a plurality of groups consisting of a master station having a means for outputting, and wirelessly transmit data from any of the slave stations to any of the above master stations, and the master station receiving the data can output the data. Is.

Then, a message information exchanging means for exchanging the message information of the identification information, the address, and the comment information of the own station with the respective slave stations to the above-mentioned master station, and each child by the means. A slave station message information storage means for storing the message information received from the station is provided.

Further, after storing the message information received from the slave station, the message information of the slave station whose new message information could not be exchanged by the message information exchanging means even after a lapse of a certain time is set as the slave station message information. A slave station monitoring control means to be deleted from the storage means and a means for displaying information indicating a slave station capable of data communication based on the message information stored in the slave station message information storage means are provided.

On the other hand, message information exchanging means for exchanging the message information of the identification information, address and comment information of the own station with the respective parent stations at regular intervals with the slave station,
By the means, a master station message information storage means for storing the message information received from each master station is provided.

Further, after storing the message information received from the master station, the message information of the master station whose new message information could not be exchanged by the message information exchanging means even after a lapse of a certain time is replaced with the message information of the master station. Master station monitoring control means to be deleted from the storage means, means for displaying the latest data-transmittable master station based on the message information stored in the master station message information storage means, and display by the means And a master station selecting means for selecting a master station to which the data is to be transmitted based on the obtained information.

Further, the master station monitors a bit error that occurs due to a decrease in reception sensitivity in the data received from the slave station at the time of exchanging the message information by the message information exchanging means, and an error based on the result of the monitoring. Providing a master station error monitoring means for adding the occurrence status data to the comment information of its own station, and the slave station depending on the cause such as a decrease in reception sensitivity in the data received from the master station when the message information is exchanged by the message information exchange means. It is preferable to provide a slave station error monitoring unit that monitors a bit error that occurs and adds error occurrence status data based on the result of the monitoring to the comment information of the local station.

Further, the master station may be provided with a priority order setting means for adding priority order information of data reception to each slave station to the message information stored in the slave station message information storage means.

[0015]

In the wireless communication system according to the present invention, the master station exchanges message information such as its own station identification information, address and comment information with each slave station at regular intervals and receives the message information from each slave station. The message information of the slave station whose new message information could not be exchanged after a certain period of time is deleted, and the information indicating the slave station capable of data communication is stored based on the stored message information. Since it is displayed, the operator of the master station can easily grasp the sharing status of the slave stations, and can manage the data communication by the plurality of slave stations.

On the other hand, the slave station exchanges message information such as its own identification information, address, and comment information with each parent station at regular intervals, stores the message information received from each parent station, and then keeps it constant. The message information of the master station that could not exchange new message information over time is deleted, and based on the stored message information, the information indicating the master station that can send the latest data is displayed. Select the master station to send the data to based on the displayed contents.

Therefore, the operator of the slave station does not need to check the address of the master station to which he wants to connect,
The latest linkable master station can be easily searched for and selected, and a usable master station can be easily and efficiently selected from a plurality of master stations on the slave station side.

Further, the master station monitors a bit error that occurs due to a decrease in reception sensitivity in the data received from the slave station when exchanging the message information, and the error occurrence status data based on the result of the monitoring is used as a comment of its own station. Append to information. On the other hand, the slave station also monitors the bit error that occurs due to the deterioration of the receiving sensitivity in the data received from the master station when exchanging the message information, and adds the error occurrence status data based on the result of the monitoring to the comment information of its own station. To do so.

In this way, it is possible to know the error occurrence status in the communication with the master station, to discriminate the master station which is apt to cause the communication error and should not be selected, and the slave station side is in the communication state. You can easily select a good master station.

Furthermore, if the master station adds the priority information of data reception for each slave station to the message information stored in the slave station, a plurality of slave stations can link one master station to the link channel. When a conflict occurs in attempting to establish a link, a link channel can be assigned to a slave station having a high priority, and a priority when using a master station can be assigned to each slave station.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 2 is a diagram showing the configuration of a wireless communication system which is an embodiment of the present invention. This wireless communication system comprises a plurality of groups 1, 2, ....

The group 1 includes terminal devices PC1-1 and P
C1-2, PC1-3 and the child station PS1 of each terminal device
-1, PS1-2, PS1-3, and a parent station CS1 that wirelessly transmits / receives data between each child station PS, and the parent station CS
1 is a peripheral device connected to the printer 1.

Group 2 includes a plurality of terminal devices PC2-
1, PC2-2 and slave stations PS2-1 of each terminal device thereof
It comprises a PS2-2, a master station CS2 that wirelessly transmits and receives data to and from each slave station PS, and a printer 2, which is a peripheral device connected to the master station CS2.

Then, each terminal device in each group sends data to the child station PS connected to the own device, and each child station PS wirelessly transmits the received data to the parent station CS in the same group, and its parent The station CS outputs the data received from each child station PS to a printer for printing. Therefore, one printer can be shared and used by a plurality of terminal devices in the group.

Further, data transmission / reception between the child station PS and the parent station CS is possible between each group in this wireless communication system, and each terminal device of each group transmits data to the child station PS connected to its own device. Each of the slave stations PS wirelessly transmits the received data to the master stations CS of different groups, and the master station CS outputs the data received from the slave stations PS of different groups to the printer for printing.

That is, the plurality of child stations PS of each group wirelessly transmit data to the parent station CS of any group,
The master station CS outputs the received data to a printer and prints it. Therefore, the users of each group can share and use the printers of different groups.

In this way, this wireless communication system groups a plurality of users into one group within the same group.
One printer can be shared and printers of other groups can also be used, and an n: n parent-child wireless communication network is constructed.

FIG. 1 is a block diagram showing the configurations of a parent station CS and a child station PS of the wireless communication system of this embodiment. The parent station CS has a built-in microcomputer and is shown in FIG.
As shown in, the operation unit 1, the display unit 2, the wireless transmission / reception unit 3,
The data processing unit 4, the peripheral device interface (I / F) unit 5, the ROM 6, the RAM 7, and the control unit 8 are provided.

The operation unit 1 is a touch panel for inputting various information such as the address of its own station, comment information such as the emulation type of the printer, the priority of data reception of the slave station PS, and an instruction for selecting a slave station for receiving data. An input device such as a keyboard. The display unit 2 is an LCD for displaying various information such as an error occurrence state at the time of data reception with the slave station PS, information indicating the latest data receivable slave station PS and priority information of data reception of the slave station PS. , CRT and the like.

A touch panel is provided as the operation unit 1 on the screen of the display unit 2, various operation keys are displayed in advance on the screen of the display unit 2, and the touch panel on each operation key is touched to give various operation instructions. May be input.

The wireless transmission / reception unit 3 performs control processing for wirelessly transmitting / receiving various data slotted with the slave station PS by the antenna 3a. The data processing unit 4 performs a process of converting transmission data into slots (packets) and a process of restoring reception data. The peripheral device interface (I / F) unit 5 controls the interface for outputting data to the printer.

The ROM 6 stores various processing programs, control programs, and identification information (ID) of the user's private station.
Is a memory for storing. The RAM 7 stores the address and comment information of its own station input from the operation unit 1, the identification information received from the slave station PS, the message information of the address and comment information, the error occurrence status data, and the like,
The memory is also used as a work area when performing various processes.

The control unit 8 controls the entire control of the master station and exchanges message information such as its own ID, address, comment information and error occurrence status data with the slave station PS at regular intervals. After the message information exchange process and the storage of the message information received from the slave station PS, when new message information cannot be exchanged even after a certain period of time, the slave station which deletes the message information of the slave station PS from the RAM 7 Performs supervisory control processing.

Also, a bit error occurring due to a decrease in reception sensitivity in the data received from the slave station PS at the time of exchanging message information is monitored, and error occurrence status data based on the monitoring result is added to the comment information of the own station. Then, a master station error monitoring process to be transmitted and a process for displaying information indicating a slave station capable of data communication on the display unit 2 based on the message information and the error occurrence status data stored in the RAM 7 are performed.

Further, the slave station P stored in the RAM 7
A priority setting process of adding priority information of data reception to the slave station PS to the message information of S, and a link control process of accepting data reception based on the priority information when data is simultaneously received from the plurality of slave stations. Then, processing for accepting data reception from the slave station PS selected by the operation unit 1 and various other processing are also performed.

On the other hand, the slave station PS also has a built-in microcomputer, and as shown in (b) of the figure, the operating section 11, the display section 12, the wireless transmitting / receiving section 13, the data processing section 14, the terminal device interface (I / I). F) section 15, ROM 16, RA
Each unit of M17 and control unit 18 is provided.

The operation unit 11 is an input device such as a touch panel and a keyboard for performing various inputs such as an address of its own station, comment information such as a user name of the terminal device PC, and selection of a master station of a data transmission destination. The display unit 12 is an LC that displays various information such as an error occurrence state at the time of receiving data with the parent station CS and information indicating the latest data-transmittable parent station CS.
A display device such as a D or CRT.

A touch panel is provided on the screen of the display unit 12, various operation keys are displayed in advance on the screen of the display unit 12, and the touch panel on each operation key is touched to input various operation instructions. Alternatively, the operation unit 11 may be configured.

The wireless transmission / reception unit 13 performs control processing for wirelessly transmitting / receiving various data slotted with the parent station CS by the antenna 13a. Data processing unit 14
Is a process of converting transmission data into slots (packets),
And a process of restoring the received data. The terminal device interface (I / F) unit 15 serves as an interface for data input from the terminal device PC.

The ROM 16 stores various processing programs, control programs, and user identification information (I)
It is a memory for storing D). The RAM 17 is the operation unit 1
1) Stores the address and comment information of its own station, and stores identification information, address and comment information message information received from the master station CS, error occurrence status data, etc. It is a memory that is also used as an area.

The control unit 18 controls the entire control of the slave station, and at the same time with the master station CS, the ID of its own station.
And message information exchange processing for exchanging message information of address and comment information, and after storing message information received from the parent station CS, when new message information cannot be exchanged within a certain time, the parent Station CS
The master station monitoring control processing for deleting the message information of from the RAM 17 is performed.

Further, based on the message information and the error occurrence status data stored in the RAM 17, a process for displaying the latest information indicating the master station capable of transmitting data on the display unit 12 is performed.

Further, when exchanging message information, the master station CS
Error monitoring processing that monitors bit errors that occur due to factors such as a decrease in reception sensitivity in the data received from the device, adds error occurrence status data based on the monitoring result to the comment information of the local station, and sends it A data transmission control process for transmitting data to the master station CS selected by the unit 11 and various other processes are also performed.

Next, the slave station PS and the master station CS when the data of the terminal device PC is wirelessly transmitted and printed by the printer
The process will be described. A publicly known technique may be used for this processing, so that it will be briefly described. In the slave station PS, the data processing unit 14 creates a packet for requesting link establishment under the control of the control unit 18, and the wireless transmission / reception unit 13 wirelessly transmits the packet to the master station PS.

When the parent station CS wirelessly receives the link establishment request packet from the child station PS by the wireless transmission / reception section 3, the data processing section 4 restores the packet and sends it to the control section 8, which in turn controls the control section 8. When the link establishment request is accepted, the data processing unit 4 creates a packet to which a link channel is assigned, and the wireless transmission / reception unit 3 returns the packet to establish a link with the slave station PS.

Upon receiving the link establishment packet from the parent station CS, the child station PS creates a packet of data to be output by the data processing section 14 under the control of the control section 18, and the parent station which established the link by the wireless transmission / reception section 13. Send the packet to the station CS.

When the parent station CS wirelessly receives the packet of data from the child station PS by the wireless transmission / reception section 3, the data processing section 4 restores the packet and sends it to the control section 8, which then controls the data. Is sent to the printer via the peripheral device I / F unit 5 for printing.

FIG. 3 is an explanatory diagram of a communication procedure when exchanging message information and error occurrence status data between the slave station PS and the master station CS. This communication procedure is the second generation cordless telephone system: RCR STD-28 (PHP).
The standard of is used.

First, the master station CS1 is controlled by the control unit 8 and the slave stations PS1-1, PS1-2, PS1-3 and PS2.
-1, PS2-2 and the parent station CS2 are notified of their own ID, address, and comment information by adding the error occurrence status data to the comment information and using the functional channel "BCCH".

For example, the ID "CS1-ID" of the own station, the logical address "CS1", and the comment information such as the emulation type of the printer are notified by adding error occurrence status data to the comment information. The comment information may be a character string that can be easily recognized by the operator of the partner station.

The master station CS1 manages the time schedule for issuing the functional channel "BCCH" of the master station CS2 by the control unit 8. For example, the time after the master station CS1 issues the functional channel "BCCH" : The master station CS2 manages to issue the functional channel "BCCH" after T1. In addition, the master station CS is managed so as to repeatedly issue the functional channel “BCCH” at the issuing (notifying) cycle time: T2.

On the other hand, slave stations PS1-1, PS1-2, PS
1-3, PS2-1 and PS2-2 are IDs "CS1-ID" received from the parent station CS1 under the control of the control unit 18.
The logical address “CS1”, the comment information and the error occurrence status data are stored in the RAM 17.

Further, the slave stations PS1-1, PS1-2, PS
1-3, PS2-1 and PS2-2 each have their own ID, address and comment while slightly shifting their timings with other slave stations by a predetermined time slot during the time T1 under the control of the control unit 18. Information and the comment information with error occurrence status data added to the master station C
Reply to S1. The comment information may be a character string that can be easily recognized by the operator of the partner station.

For example, when the slave station PS1-1 has its own ID "P"
S1-1-ID ", logical address" PS1-1 ", comment information such as the user name of the terminal device, and error occurrence status data added to the comment information and sent back. After a predetermined time has elapsed, the slave station PS1- 2 is the ID of your station "PS1-
2-ID ", logical address" PS1-2 ", comment information such as the user name of the terminal device, and error occurrence status data is added to the comment information and returned.

In this way, the other slave stations PS1-
3, PS2-1 and PS2-2 also notify the ID, address, and comment information of their own station in this order, and add error occurrence status data to the comment information in this order.

It should be noted that the slave station PS has the function channel "USCC".
When "H" is issued, the ID "CS-ID" of the parent station CS that is the transmission source of the functional channel "BCCH" is transmitted as a destination, and the parent station CS sends the functional channel "USCC" from the child station PS.
When "H" is received, its own ID "CS-ID"
If there is not, discard it.

The master station CS1 is controlled by the control unit 8 to control the slave stations PS1-1, PS1-2, PS1-3, PS2-1.
The ID, address, comment information, and error occurrence status data of each station received from PS2-2 are stored in the RAM 7.

When the time T1 has passed under the control of the parent station CS1, the parent station CS2 now has the child stations PS1-1 and PS1-.
2, PS1-3, PS2-1, PS2-2 own station ID
The "CS2-ID", the logical address "CS2", and the comment information such as the emulation type of the printer are added to the comment information, and the error occurrence status data is added to the function channel "BCCH".

On the other hand, the slave stations PS1-1, PS1-2, PS
1-3, PS2-1, PS2-2 are ID "CS2-ID" received from the parent station CS2 under the control of the control unit 18.
The logical address “CS2”, the comment information and the error occurrence status data are stored in the RAM 17.

Further, the slave stations PS1-1, PS1-2, PS
1-3, PS2-1 and PS2-2 add their own IDs, addresses and comment information, and add error occurrence status data to the comment information while slightly shifting the timings under the control of the control unit 18. Reply to the parent station CS2.

The master station CS2 controls the slave station PS by the control unit 8.
1-1, PS1-2, PS1-3, PS2-1, PS2
-2 stores the ID, address, comment information and error occurrence status data of its own station, which are respectively received from -2. In the above description, the slave stations PS1-1, PS1-2, P
S1-3, PS2-1, PS2-2 and master station CS1, CS
Although only the communication with the second station has been described, the same procedure is performed with the other slave stations and the master station.

In this way, the communication for exchanging the ID, address, comment information, and error occurrence status data of each local station is performed between the plurality of slave stations and the plurality of master stations at regular intervals.

FIG. 4 is a flow chart showing the slave station monitoring control processing in the master station CS. The parent station CS is the child station PS
When message information etc. is transmitted to the slave station at fixed time intervals, in step (indicated by “S” in the figure) 1, each slave station: PS
It is determined whether the functional channel "USCCH" is returned from n.

If a reply is sent, this process ends, but if no reply is sent, the process proceeds to step 2 and the partner station ID corresponding to the slave station from which the function channel "USCCH" is not returned from the partner station information table of the RAM 7, The record of the partner station address, partner station comment information, and error occurrence status data is deleted, and this processing ends.

In this way, the master station CS may receive the slave station PS due to a decrease in reception sensitivity or the like within a predetermined time.
When the functional channel is not received from the slave station PS
ID, address, comment information, partner station ID, and error occurrence status data are deleted.

Therefore, the master station CS always selects the slave station PS capable of the latest data communication, that is, the slave station CS having the possibility of always the latest data transmission, based on the information received from the slave station PS at regular intervals. It is possible to grasp and manage the child station that receives data.

FIG. 5 is a flow chart showing the master station monitoring control processing in the slave station PS. The child station PS is the parent station CS
When message information and the like are sent back to the master station at a constant time, in step (indicated by "S" in the figure) 11, each master station: C
It is determined whether the functional channel “BCCH” is transmitted from Sn.

Then, if it is transmitted, this processing is terminated, but if it is not transmitted, the process proceeds to step 12 and the RAM 17
Delete the record of the partner station ID, the partner station address, the partner station comment information, the partner station ID, and the error occurrence status data corresponding to the master station to which the function channel "BCCH" was not transmitted from the partner station information table of This process ends.

In this way, the child station PS can know the latest data-transmittable parent station CS based on the information received from the parent station CS at regular time intervals, and can quickly find the data-transmission destination parent station CS. Can be selected.

FIG. 6 is a flowchart showing the master station error monitoring processing in the master station CS. The parent station CS is the child station P
A bit error occurring in the data received from S due to a decrease in reception sensitivity or the like is monitored, and in step (indicated by "S" in the figure) 21, it is determined whether or not the bit error occurs continuously.

If it does not occur continuously, this process is terminated. If it occurs continuously, the number of occurrences is counted,
When the process proceeds to step 22 and the message information is transmitted to the slave station PS, the number of error occurrences within a certain period is set in the comment information of the message station of the message station and transmitted,
This process ends.

In this way, the master station CS can automatically obtain the error occurrence status of the slave station PS at regular intervals, so that error management of the communication network can be performed.

FIG. 7 is a flowchart showing a slave station error monitoring process in the slave station PS. The slave station PS is the master station C
A bit error occurring in the data received from S due to a decrease in receiving sensitivity or the like is monitored, and it is determined in step (indicated by "S" in the figure) 31 whether or not the bit error occurs continuously.

If the error does not occur continuously, the process is terminated. If the error occurs continuously, the USCCH of the error occurrence
The number of occurrences of
When the message information is transmitted to S, the number of error occurrences within a certain period is set in the comment information of its own station of the message information and transmitted, and this processing is ended.

In this way, since the slave station PS can automatically obtain the error occurrence status of the master station CS at regular time intervals, the master station C having a small possibility of data transmission error is small.
S can be easily selected.

FIG. 8 is a flowchart showing the link control processing in the parent station CS with the child station PS. The parent station CS always determines in step (indicated by "S" in the figure) 41 whether or not there is a link channel establishment request from a plurality of child stations PS, and if so, proceeds to step 42 and requests the link channel establishment ( From the slave station PS that received the data transmission request), RAM
Link channel assignment is issued to the slave station PS having the highest priority stored in the partner station information table 7 and data transmission is accepted.

In this way, the master station CS is connected to the plurality of slave stations P.
When data transmission requests are received from S at the same time, the data transmission request of the slave station PS having the highest priority set in advance is preferentially received and the data of the slave station PS is received. The usage by PS can be managed.

FIG. 9 is a diagram showing an example of a logical format of the partner station information table of the RAM 17 of the slave station PS. The partner station information table of the RAM 17 stores the ID, address, comment information, and error occurrence status data received from the parent station CS, as well as the designation information of the parent station to which the data is transmitted.

For example, for the master station CS1, the partner station address is the logical address "CS1" of the master station CS1, and the partner station comment information is "Postscript" which is the emulation type of the printer connected to the master station CS1.
To the partner station ID, the identification code of the master station CS1 is “00000
"01" is stored in the partner station error occurrence status data as the number of errors that occurred in the parent station CS1 within a certain period.

When the master station CS1 is selected as the data transmission destination from the operation unit 11, flag information (indicated by a mark "*" in the figure) indicating that the master station CS1 has been selected is selected. Store.

The slave station PS can display the partner station information stored in the partner station information table on the display unit 12 by the control processing of the controller 18. At that time, the control unit 1
8 calculates the error rate based on the error occurrence status data of the partner station information stored in the RAM 17,
Displayed along with the address and comment information.

FIG. 10 is a diagram showing a display example of partner station information stored in the partner station information table of the RAM 17 of the slave station PS. For example, when an instruction to display partner station information is input from the operation unit 11, the address, comment information, and error rate of the master station CS are displayed in the format shown in FIG.
The partner station ID that is not disclosed to the user is not displayed.

Then, when the user selects the master station CS using the operation unit 11, a mark "*" indicating the selection is displayed in the selection content column of the selected master station CS.
In this way, it is convenient if the selected parent station CS can be confirmed at a glance.

On the other hand, the master station CS can also display the partner station information stored in the partner station information table of the RAM 7 on the display section 2 by the control process of the control section 8. then,
The partner station ID that is not disclosed to the user is not displayed.

Next, the master station CS can set the priority of data reception for each slave station PS. Figure 11
FIG. 6 is a diagram showing an example of a format of a priority order setting table of the RAM 7 of the master station CS. In this way, the inputted priority is added to the address of the slave station PS and the comment information and stored. For example, the priority of the child station PS1-1 is 1
And the priority of the slave station PS2-1 is number 3.

When setting the priority of data reception of the slave station PS in the master station CS, the address of the slave station PS and the comment information are displayed in the format shown in FIG. When the operator inputs the priority order of each child station PS while looking at the displayed contents, the priority number is displayed in the priority order column of each child station PS.

As described above, the address and comment information of each slave station PS can be displayed in the form of a list when setting the priority of the slave station PS, and the priority can be set with reference to the list. Thus, the priority setting work can be efficiently performed.

[0088]

As described above, according to the wireless communication system of the present invention, the message information including the identification information, the address, and the comment information of the self station is sent between the master station and the slave station at regular intervals. Since the information is transmitted and the information on the latest data receivable slave station is displayed on the side of the master station based on the message information, the situation of how many slave stations are shared can be constantly monitored.

On the other hand, since the slave station side displays the latest information of the master station capable of transmitting data based on the message information and selects the master station of the transmission destination based on the displayed contents, a plurality of slave stations can be selected. It is possible to quickly select an available master station from among the master stations of, and improve operability.

Further, by monitoring the bit errors generated at the master station and the slave station and exchanging the error occurrence status data when exchanging the message information, the master station having a good communication state on the slave station side. Can be easily selected,
Operability can be improved.

Further, by adding priority order information to the message information received from each slave station at the master station, the priority order when the master station is used can be assigned to each slave station. It is possible to expand the setting expandability and significantly improve convenience.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a master station CS and a slave station PS of a wireless communication system of this embodiment.

FIG. 2 is a diagram showing a configuration of a wireless communication system which is an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a communication procedure when exchanging message information and error occurrence status data between the child station PS and the parent station CS according to the embodiment of this invention.

FIG. 4 is a flowchart showing a slave station monitoring control process in the master station CS according to the embodiment of the present invention.

FIG. 5 is a flowchart showing a master station monitoring control process in the slave station PS according to the embodiment of the present invention.

FIG. 6 is a flowchart showing a master station error monitoring process in the master station CS according to the embodiment of the present invention.

FIG. 7 is a flowchart showing a slave station error monitoring process in the slave station PS according to the embodiment of the present invention.

FIG. 8 is a slave station PS in the master station CS according to the embodiment of the present invention.
It is a flowchart which shows the link control process with.

FIG. 9 is a diagram showing an example of a logical format of a partner station information table of the RAM 17 of the slave station PS according to the embodiment of the present invention.

FIG. 10 is a diagram showing a display example of partner station information stored in a partner station information table of the RAM 17 of the slave station PS according to the embodiment of the present invention.

FIG. 11 is a diagram showing an example of a format of a priority setting table of the RAM 7 of the master station CS according to the embodiment of the present invention.

[Explanation of symbols]

1, 11: Operation part 2, 12: Display part 3, 13: Wireless transmission / reception part 4, 14: Data processing part 5: Peripheral device interface (I / F) part 6, 16: ROM 7, 17: RAM 8, 18 : Control unit 15: Terminal device interface (I / F) unit PC1-1, PC1-2, PC1-3, PC2-1, P
C2-2: Terminal device PS1-1, PS1-2, PS1-3, PS2-1, P
S2-2: Slave station CS1, CS2: Master station

Claims (3)

[Claims] 1. A plurality of groups including a plurality of slave stations having means for wirelessly transmitting data to the master station and a master station having means for outputting data received from each slave station, each master station being provided. In a wireless communication system capable of wirelessly transmitting data from any group of slave stations and receiving the data, the master station is capable of outputting the data to the master station, which is fixed between the master station and each slave station. Message information exchanging means for exchanging message information such as identification information, address, and comment information of its own station for each time, slave station message information storing means for storing the message information received from each slave station by the means, and the means After storing the message information received from the slave station, the message of the slave station was unable to exchange new message information by the message information exchanging means even after a lapse of a certain time. A sub-station monitoring control means for deleting di information from the slave station message information storing means,
Means for displaying information indicating a slave station capable of performing data communication based on the message information stored in the slave station message information storage means, and the slave station at fixed time intervals between the slave stations. A message information exchange means for exchanging identification information, address information, and message information of comment information of its own station, a master station message information storage means for storing the message information received from each of the master stations by the means, and a master for the means. A parent that deletes from the parent station message information storage means the message information of the parent station whose new message information could not be exchanged by the message information exchange means even after a certain time has elapsed after storing the message information received from the station. Station monitoring control means,
Means for displaying information indicating the latest data-transmittable master station based on the message information stored in the master station message information storage means, and a parent of the data transmission destination based on the information displayed by the means A wireless communication system comprising: a master station selecting means for selecting a station. 2. The wireless communication system according to claim 1, wherein the master station receives a bit error generated due to a decrease in reception sensitivity in data received from a slave station during message information exchange by the message information exchange means. Monitor
The master station error monitoring means for adding the error occurrence status data based on the result of the monitoring to the comment information of the own station is provided, and the slave station is provided with the Monitors bit errors caused by causes such as reduced reception sensitivity,
A wireless transmission system comprising: a slave station error monitoring means for adding error occurrence status data based on the result of the monitoring to comment information of the local station. 3. The wireless communication system according to claim 1, wherein the master station includes message information stored in the slave station message information storage means with priority order information of data reception for each slave station. A wireless communication system comprising additional priority setting means.