JPH0865313A - Method and device for automatically setting communication table - Google Patents

Abstract

PURPOSE: To provide a method and a device which easily set a communication table with high precision in a short time without manual work. CONSTITUTION: An instructing means 30 controlled by a control means 36 instructs each distributed base station 12 to transmit a response request signal to each fixed slave station a prescribed number of times, and the fixed slave station which can receive this response request signal transmits a response signal to the distributed base station 12 which transmits the response request signal. This response signal is sent from the distributed base station 12 to a reception means 32 and is stored in a memory 34 together with the number of the fixed slave station, which transmits this response signal, and the number of the distributed base station 12 to which it is transmitted. Based on stored contents of the memory 34, the control means 36 allows the number of each fixed slave station and the number of one of distributed base stations 12, to which this fixed slave station transmits the response signal a prescribed number of or more times, to correspond to each other, thus generating the communication table.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for automatically setting a communication table required for wireless communication in a short time by a polling method.

[0002]

2. Description of the Related Art FIG. 10 shows a system configuration when wireless communication is performed by a polling method.

In FIG. 10, a master station 10 is a distributed base station 1
2 and the communication cable 11. The distributed base station 12 and the fixed slave station 13 have a radio function and can communicate with each other wirelessly, and the master station 10 controls the distributed base station 12 to communicate with the fixed slave station 13 by polling. You can do it.

A plurality of distributed base stations 12 and fixed stations 13 are installed, and each distributed base station 12 has A ₁ to A _1.
The numbers _{N and} the fixed slave stations 13 are numbered a ₁ to a _n .

Here, the operation of the system of FIG. 10 is as follows. One of the distributed base stations 12 having the master station 10, for example, A _{1 is connected} to the fixed slave station 13 by the communication cable 11.
One of the above, for example, a ₁ is designated to instruct to transmit wirelessly, A ₁ of the instructed distributed base station 12 transmits a predetermined signal to a _{1 of the} fixed station 13. The designated a ₁ of the fixed slave station 13 wirelessly returns a response to this. This response is sent via the A ₁ of the corresponding distributed base station 12 to the master station 10
And the wireless communication is completed once.

FIG. 11 shows a wireless communication area 20 of each distributed base station 12, that is, an area where each distributed base station 12 is capable of wireless communication.

As shown in FIG. 11, each distributed base station 1
Since the wireless communication area 20 is limited to a limited area, wireless communication is considered to be difficult outside this area. Therefore, in order to enable wireless communication of the entire required area 16, it is necessary to arrange the distributed base stations 12 at several places to cover the required area 16. This is the reason why a plurality of distributed base stations 12 are installed as described above.

On the other hand, it is necessary to install a large number of fixed slave stations 13 at various places due to usage requirements. However, depending on the combination of the distributed base station 12 and the fixed slave station 13, the fixed slave station 13 may be installed in the distributed base station 12. There is a case where it is outside the wireless communication area 20 and wireless communication is impossible. Therefore, in order to establish wireless communication by polling in a short time, it is necessary to previously create a communication table as to which distributed base station 12 communicates with which fixed slave station 13. That is, the communication table defines the correspondence relationship between the distributed base station 12 and the fixed slave station 13 that can perform the best communication.

In the conventional setting of the communication table, the wireless communication area 20 that can be covered by each distributed base station 12 as shown in FIG. Had to use their intuition and experience to judge each other's communication relationships.

[0010]

However, in radio communication, radio waves are emitted into the atmosphere, so if there is a metallic object (equipment) in the path of the radio waves or around the radio, the radio waves will be reflected or Fading and cancellation occur due to interference. For this reason, the communication state is greatly influenced by the environment around the wireless device, and even in the wireless communication area 20, there are areas where communication is possible and areas where communication is not possible. Therefore,
The wireless communication area 20 of one distributed base station shown in FIG.
Is likely to be only one guide in areas where equipment is dense.

An extreme example is shown in FIG.
One of the fixed slave stations 13, a ₁ is A _{2 of the} distributed base station 12.
, Which is the closest to the distributed base station A and is within the communication area 20 of the distributed base station A due to the fading or the like.
There are cases where ₁ can communicate.

Therefore, it is not easy for a person to set the communication table in consideration of the environment around the radio.

Further, it is necessary to make corrections every time a change in the communication state occurs, such as an increase or decrease in the number of distributed base stations 12 or fixed slave stations 13, and the work is complicated.

Furthermore, when one-to-one communication relationship between the distributed base station 12 and the fixed station 13 is registered in advance as a fixed communication table and wireless communication is performed, the wireless communication is in progress. Changes the surrounding environment (moving metal objects, etc.),
In some cases, communication was cut off.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide an apparatus and method capable of easily and accurately setting a communication table in a short time without depending on a person. .

[0016]

In order to achieve the above object, the first invention of the present application provides the best communication in wireless communication between a plurality of distributed base stations and a plurality of fixed stations. An automatic communication table setting device for automatically setting a communication table that defines a combination of a distributed base station and a fixed slave station, which instructs the distributed base stations to respond to the fixed slave stations a predetermined number of times. Instructing means for transmitting a request signal, and when each of the stationary stations receives the response request signal, the response signal transmitted to the distributed base station that has transmitted the response request signal is transmitted to the distributed base station. The number of times of transmission of the response signal transmitted by each of the fixed stations based on the response means received by the receiving means and the response signal received by the receiving means, the number of the transmitted fixed station and the distribution of the transmitted counterparts. With the base station number Corresponding storage means for storing, the number of each fixed slave station based on the storage of the storage means, and the number of the distributed base station to which the fixed slave station has transmitted a response signal a predetermined number of times or more. , And setting means for setting the communication table according to this correspondence relationship.

A second invention of the present application specifies a combination of a distributed base station and a fixed slave station that can perform the best communication in wireless communication between a plurality of distributed base stations and a plurality of fixed slave stations. An automatic communication table setting method for automatically setting a communication table, wherein each distributed base station makes a response request to each stationary station a predetermined number of times, and each stationary station receives the response request. And a step of responding to the distributed base station that requested the response, and the number of times each of the fixed slave stations responded, together with the number of the fixed slave station that responded and the number of the responded distributed base station. And the number of each of the fixed base stations based on the stored information and the number of the distributed base station that the fixed base station has responded to a predetermined number of times or more, and the communication is performed by this correspondence. Set the table Characterized in that it comprises a step.

[0018]

According to the above construction, each fixed slave station is made to correspond to the distributed base station to which the fixed slave station has responded to the response request a predetermined number of times or more, and the communication table is automatically set by this correspondence relationship. can do.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

Embodiment 1 FIG. 1 shows a block diagram of an embodiment 1 of an automatic communication table setting device according to the present invention, which is described above with reference to FIGS.
The same members as those in FIG. In this embodiment, the automatic communication table setting device is the master station 10.
It is provided inside.

In FIG. 1, the master station 10 is a fixed slave station 13
To the distributed base station 12 for sending a response request signal a predetermined number of times, and the response signal sent by the fixed station 13 to this response request signal is received via the distributed base station 12. Receiving means 32, a memory 34 for storing the number of times the stationary slave station 13 has transmitted a response signal together with the stationary slave station 13 that has transmitted and the distributed base station 12 of the other party that has transmitted, the instructing means 30, and the receiving means. 32 and control means 36 for controlling the operation of the memory 34.
Here, the memory 34 constitutes the storage means of the present invention.

The control means 36 controls the instructing means 30 to specify the fixed slave stations 13 one by one, and each distributed base station 12
To send a response request signal in sequence,
Each distributed base station 12 sends a response request signal to the fixed slave station 13. If the designated fixed station 13 can receive the response request signal, the fixed station 13 is configured to designate the distributed base station 12 that has transmitted the response request signal and return the response signal.

The response signal transmitted from the fixed slave station 13 is received by the distributed base station 12 transmitting the response request signal, and the master station 10 receives the response signal.
Is sent to the receiving means 32. When the receiving means 32 receives the response signal, the fact that the response signal is received is stored in the memory 34 together with the number of the fixed slave station 13 which transmitted the response signal and the number of the distributed base station 12 of the other party which transmitted the response signal. Since the memory 34 stores the reception of the response signal each time, it is possible to know how many times the specific fixed station 13 has returned the response signal to the response request signal of the specific distributed base station 12.

Depending on the communication state between the distributed base station 12 and the fixed slave station 13, the fixed slave station 13 may not be able to receive the response request signal. At this time, the response signal is not transmitted to the distributed base station 12. Therefore, each distributed base station 12 transmits a response request signal a predetermined number of times to each of the fixed slave stations 13,
By counting the number of times the response signal is returned, the state of wireless communication between each distributed base station 12 and each stationary station 13 can be determined.

In the present embodiment, it is determined that the combination of the distributed base station 12 and the fixed slave station 13 in which the largest number of response signals are returned for the predetermined number of response request signals is in the best communication state. are doing.

The control means 36 includes the setting means of the present invention, and based on the storage of the memory 34 described above, the number of each fixed slave station 13 and the party to which the fixed slave station 13 transmitted the most response signal. And one number of each distributed base station 12 is made to correspond. Then, based on this correspondence, a combination of each fixed station 13 and the distributed base station 12 capable of the best communication with the fixed station 13 is set as the communication table.

FIG. 2 shows a flowchart of a method for automatically setting the communication table in the master station 10. Further, FIG. 3 shows a check result file showing the check result of how many times each fixed slave station 13 has returned a response signal to the response request signal of each distributed base station 12. The check result file is stored in the memory 34, and the distributed base station 12 and the fixed slave station 13 form a matrix. The number of times each fixed slave station 13 responds to the response request signal of each distributed base station 12 is written in the column where the column of the distributed base station 12 and the row of the fixed slave station 13 intersect.

A method for automatically setting the communication table will be described below with reference to FIGS.

First, in S1 of FIG. 2, the check count M, which is the number of times the response request signal is transmitted, and the data of the check result file shown in FIG. 3 are all set to zero.

Next, in S2 and S3, the number of the distributed base station 12 and the number of the fixed slave station 13 are respectively set to "1" (A ₁ ,
a ₁ ).

Then, in S4, A ₁ of the distributed base station 12 transmits a response request signal to a _{1 of the} fixed slave station 13 as a check transmission 14 shown in FIG.

Thereafter, in step S5, the transmission 15 of the response signal to the check transmission 14 (FIG. 10) is transmitted to the corresponding fixed slave station 13
It is judged from a1 of _No. whether it is within the specified time. If it is within the specified time, the process proceeds to S6, and if not, the process jumps to S7.

In S6, the number of responses in the column where the corresponding distributed base station 12 and the corresponding fixed slave station 13 in the check result file of FIG. 3, where A ₁ and a ₁ intersect, is incremented. Therefore, if it is determined in S5 that there is no transmission 15 of the response signal within the specified time, the number in the check result file is not incremented.

In S7, the number of the fixed slave station 13 is incremented. Then, the fixed slave station 1 used in S8
Fixed slave station 1 incremented with the maximum value n of number 3
Compare with number 3. The maximum number n of the fixed slave station 13
If the following, return to S4 and repeat the above steps. If the number of the fixed slave station 13 is larger than the maximum value n, S
9, the number of the distributed base station 12 is incremented.

Next, in S10, the maximum value N of the distributed base station 12 is compared with the incremented distributed base station 12 number. If the number of the distributed base station 12 is less than or equal to the maximum value N, the process returns to S3 and the above steps are repeated. If the number of the distributed base station 12 becomes larger than the maximum value N, the process proceeds to S11 and the check count M is incremented.

As described above, all distributed base stations 12 and all fixed slave stations 13
You have checked the communication status with.

In S12, if the number of checks M is smaller than the set value of the number of checks, the process returns to S2, and the communication states between all the distributed base stations 12 and all the fixed slave stations 13 are checked again.

If the number of checks M is equal to or larger than the set value of the number of checks in S12, the process proceeds to S13, and the check of the communication state is completed.

As described above, the communication state check is repeated until the check count M reaches the set value of the check count. When the equipment is moving, the influence change over time is also included. Therefore, the larger the set value of the number of checks, the more effective the check of the communication state becomes.

At S13, the number of the fixed slave station 13 is set to "1".
To Subsequent processing is to set the communication table shown in FIG. 4 for each fixed slave station 13 based on the values of the check result file of FIG.

The communication table shown in FIG. 4 corresponds to one fixed base station 13 to one distributed base station 12 to which the fixed base station 13 returned the most response signals.

In S14 of FIG. 2, the distributed base station in which the corresponding fixed slave station 13 shows the largest value from the count value of the communication state checked so far, that is, the value of each column of the check result file of FIG. Select 12.

In S15, it is determined whether or not the number of distributed base stations 12 selected in S14 is two or more. If there are two or more, the process proceeds to S16, and the one with the smaller number of the distributed base station 12 is selected. If there is one, jump to S17.

In S17, S15 or S16
The number of the distributed base station 12 selected in step 4 is registered in the communication table of FIG.

Next, referring to FIGS. 3 and 4, S14 to S1
The movement up to 7 will be specifically described. For example, the number of the distributed base station 12 having the largest count value in the a ₁ column of the fixed slave station 13 in FIG. 3 is A ₁ , which is 10 times. Therefore, in S14, one A ₁ of the distributed base station 12 is selected, and in S17, the distributed base station 1 is entered in the a ₁ column of the fixed station 13 of the communication table of FIG.
A _{1 of} 2 is registered.

The numbers of the distributed base station 12 having the largest count value in the a ₂ column of the fixed slave station 13 in FIG. 3 are A ₂ and A ₂ .
₃ times 10 times. Since there are two distributed base stations 12 selected in S14, the process advances from S15 to S16 to select A ₂ of the distributed base station 12 and, in S17, the a ₂ column of the fixed station 13 of the communication table of FIG. The number A ₂ of the distributed base station 12 is registered in.

In S18, the number of the fixed slave station 13 is incremented. Then, in S19, the incremented number of the fixed slave station 13 is compared with the number n of all fixed slave stations 13. If the number of the fixed slave station 13 is greater than n, the process proceeds to the end. If it is less than n, the process returns to S14 and repeats the above steps.

By performing the communication check as described above, the communication table shown in FIG. 4 is automatically set in an optimum state in consideration of the environment around the radio. This also eliminates the need for an expert to set up the communication table.

With this function, it is also possible to manually change the communication table after automatic setting, as in the conventional case.

Embodiment 2 FIGS. 5 and 6 show flowcharts of Embodiment 2 of the present invention.

In FIG. 5, the flow from S1 to S13 is the same as in FIG. 2 of the first embodiment.

As described above, the check result file of FIG. 3 is created in S1 to S12, and the numbers of the fixed slave station 13 and the distributed base station 12 are set to "1" in S13 and S20 (A ₁ , A ₁ ).

In S21, the set value for defining the number of checks is multiplied by a coefficient, and it is compared whether or not this value is smaller than the value in each column of the check result file.

If the count value in the relevant column of the check result file is greater than or equal to the set value × coefficient, a flag indicating communication is set in the corresponding column of the communication base table shown in FIG. 7 in S22. This flag is shown as "1" in the corresponding column of the communication base table in FIG. That is, in the present embodiment, it is determined that all the combinations of the distributed base station 12 and the fixed slave station 13 in which the response signal is returned a predetermined number of times or more specified in S21 in response to the predetermined number of response request signals are communicable. To do.

If the count value in the relevant column of the check result file is smaller than the set value × coefficient in S21, the process jumps to S23. In this case, since the communicable flag is not set in the corresponding column of the communication base table of FIG. 7, the corresponding column remains “0” indicating that communication is impossible.

As described above, the communication base table indicates whether communication is possible between each stationary station 13 and each distributed base station 12. If "1" is set in the column of the communication base table, the fixed slave station 13 and the distributed base station 12 corresponding to that column
It is possible to communicate between and, and if it is "0", it means that the communication is impossible.

In S23, the number of the distributed base station 12 is incremented, and the number of the distributed base station 12 incremented in S24 is compared with the maximum value N. If the number of the distributed base station 12 is less than or equal to the maximum value N, the process returns to S21 and repeats the above steps. On the other hand, the number of the distributed base station 12 is the maximum value N
If it is larger, the process proceeds to S25 and the number of the fixed slave station 13 is incremented.

In S26, the incremented number of the fixed slave stations 13 is compared with the number (maximum value) n of all the fixed slave stations 13. If the number of the fixed slave station 13 is less than or equal to the maximum value n, S2
Return to 0 and repeat the above steps. On the other hand, fixed slave station 1
If the number 3 is larger than the maximum value n, the process proceeds to the end.

By performing the above processing, the communication base table shown in FIG. 7 is created.

Next, based on the communication base table of FIG. 7, the flow of the irregular communication table for automatically creating the communication table between the distributed base station 12 and the fixed station 13 shown in FIG. 8 is illustrated. 6 will be described.

In S27, among the distributed base stations 12 communicable by the communication base table of FIG. 7, the distributed base station 12 having the smallest number is associated with each fixed slave station 13, and the communication table (1) of FIG. Create the second time. For example, in the communication base table, a ₂ of the fixed slave station 13 is the distributed base station 12
Of A _2, A ₃ and if it is communicable, in the communication table distributed base station 12 in the column of a ₂ of the stator station 13 A ₂
Will be set.

Next, in S28, the number of the distributed base station 12 is set to "1". Then, in S29, the no-response table shown in FIG. 9 is initialized. That is, all the fields of no response are set to "0". Here, the non-response table is the fixed slave station 13 that does not respond to the polling of the distributed base station 12.
The fixed slave station 1 for checking
A flag ("1") is set on the number "3". This non-response table is created for each distributed base station 12, and is initialized every time in S29 before the communication of one distributed base station 12 is completed and the communication of the next distributed base station 12 is started. .

In S30, the distributed base station 12 polls the set fixed station 13 based on the communication table of FIG. 8A.

In S31, for the fixed slave station 13 that does not respond to the polling, a flag ("1") is set in the corresponding fixed slave station 13 column of the no-response table in FIG.

When the set polling for the fixed slave station 13 is completed, in S32, it is determined whether or not there is a fixed slave station 13 for which a non-response flag is set in the non-response table.

If there is no fixed slave station 13 for which a non-response flag is set, the process proceeds to S38, and if there is, the process proceeds to S33.

In S33, the fixed slave station 13 which has not responded is determined to be the current distributed base station 1 based on the communication base table.
It is determined whether or not communication is possible with the distributed base station 12 having a number larger than the number 2.

If there is such a distributed base station 12, S3
4, the distributed base station 12 having the next largest number after the number of the current distributed base station 12 is selected from among the distributed base stations 12 that are communicable in the communication base table, and S35 is selected.
Then, the distributed base station 12 of that number is reflected in the communication table.

For example, the flow from S32 to S35 will be described for the fixed slave station a _{2 with} reference to FIGS.

First, since the flag is set in FIG. 9 in S32, the process proceeds to S33. Then, in S33, as shown in FIG.
The distributed base station 12 registered in the first communication table shown in (a) has a number A ₂ , and the communication base table of FIG. that is, the process proceeds to S34 because it has become possible communication even a _3. In addition S34, select the A ₃ is a distributed base station of the next higher number, to reflect the selected number in the communication table S35. As a result, the communication table becomes like the second one in FIG.

Next, the process returns to S33, and if there is no one capable of communicating with the non-responsive fixed slave station 13 among the distributed base stations 12 having a number larger than the current one, the process proceeds to S36.

In S36, contrary to S33, it is determined whether or not the distributed base station 12 having a number smaller than that of the current distributed base station 12 is set to be communicable with the fixed slave station 13.

If there is no such distributed base station 12, S3
8. If there is, proceed to S37. In S37, the smallest number among the distributed base stations 12 registered as communicable in the communication base table is selected. And S3
In No. 5, as described above, the selected number is reflected in the communication table of FIG.

In this way, the wireless communication state is constantly monitored,
The optimal communication table is automatically changed and set according to the situation.

In S38, the number of the distributed base station 12 is incremented.

In S39, the number of the distributed base station 12 is compared with its maximum value N.

If the number of the distributed base station 12 is less than or equal to the maximum value N, the process proceeds to S29, and the same steps as above are repeated in the distributed base station 12 of the next number. If the number of the distributed base station 12 is larger than the maximum value N, the process returns to S28 and the distributed base station 1
The above steps are repeated again from A _{1 of} 2.

As described above, in this embodiment, the fixed slave station 13 is used.
One or more distributed base poles 1 capable of communicating with one
2 as a communication base table, and based on this,
The communication relationship between the distributed base pole 12 and the fixed station 13 is registered as a communication table one by one as in the conventional case. Then, when a disconnection occurs during wireless communication, the relationship between the corresponding stator pole 13 and distributed base pole 12 is automatically changed based on the communication base table.

Therefore, in the conventional one-to-one polling communication, which is a fixed communication table,
In this embodiment, a variable communication table can be realized. For this reason, in the conventional example or the first embodiment, when a combination of the distributed base pole 12 and the fixed station 13 incapable of wireless communication once occurs, it is necessary to reset the communication table from the beginning each time. In this embodiment, it is possible to automatically change only the combination that has been cut off, and the repair time of the communication system can be shortened.

Further, since the communication table changed by the above flow is in the optimum communication state, the number of times of no response is smaller than in the conventional case, and the probability of the system going down is low.

[0081]

As described above, according to the present invention,
It is possible to associate each fixed slave station with one of the distributed base stations that is a partner to which the fixed slave station has responded to the response request a predetermined number of times or more, and automatically set the communication table based on this correspondence. As a result, it is possible to provide an apparatus and method that can set the communication table easily and accurately in a short time without depending on a person.

Furthermore, this communication table can be automatically changed to an optimum state.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of an automatic communication table setting device according to the present invention.

FIG. 2 is a flowchart showing a method for automatically setting a communication table.

FIG. 3 is a diagram showing an example of a check result file.

FIG. 4 is a diagram showing an example of a communication table.

[Fig. 5] Automatically setting the communication base table

FIG. 6 is a flowchart showing a method for automatically setting and changing a communication table.

FIG. 7 is a diagram showing an example of a communication base table.

8 is a diagram showing an example of a communication table set and changed by the flow of FIG.

FIG. 9 is a diagram showing an example of a no-response table.

FIG. 10 is a configuration diagram of a system when wireless communication is performed by a polling method.

FIG. 11 is a diagram showing an example of a wireless communication area of each distributed base station.

[Explanation of symbols]

 10 parent station 11 communication cable 12 distributed base station 13 fixed slave station 20 wireless communication area 30 instruction means 32 receiving means 34 memory 36 control means

Claims (2)

[Claims] 1. In a wireless communication between a plurality of distributed base stations and a plurality of fixed slave stations, a communication table for automatically defining a combination of a distributed base station and a fixed slave station that can perform the best communication is automatically provided. An automatic communication table setting device for setting, an instructing means for instructing each of the distributed base stations to transmit a response request signal to each of the fixed stations a predetermined number of times, and each of the fixed stations, the response request signal Based on the response signal received by the receiving unit, the receiving unit receiving a response signal transmitted to the distributed base station that has transmitted the response request signal via the distributed base station when receiving the response request signal. A storage means for storing the number of times of transmission of the response signal transmitted by each of the fixed slave stations together with the number of the fixed slave station that has transmitted and the number of the distributed base station of the other party that has transmitted, the storage means; Each of the above And the number of stator stations,
Automatic communication comprising: a setting means for associating the fixed base station with the number of the distributed base station to which the response signal has been transmitted a predetermined number of times or more, and setting the communication table based on this correspondence. Table setting device. 2. In a wireless communication performed between a plurality of distributed base stations and a plurality of fixed slave stations, a communication table for automatically defining a combination of the distributed base station and the fixed slave stations that can perform the best communication is automatically provided. An automatic communication table setting method for setting, wherein each distributed base station makes a response request to each stationary station a predetermined number of times, and when each stationary station receives the response request, the response request is made. A step of responding to the distributed base station; a step of storing the number of times each stationary station has responded, together with the number of the stationary station that responded and the number of the distributed distributed base station that responded, and the storage The number of each fixed slave station based on the information provided,
A step of associating the fixed base station with the number of the distributed base station that has responded a predetermined number of times or more, and setting the communication table according to this correspondence relationship.