JPH0353653A - Distributed system and its information transmission method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a distributed system that uses telephone lines as signal transmission paths, and an information transmission method that avoids concentration of traffic on the lines. [Prior Art] The configuration of a conventional building management system has been a centralized type using a dedicated signal transmission path. In the centralized type, the terminal device has the function of input/output (I/O) interface with the equipment, data measurement is sent to the central equipment via the terminal equipment, and the equipment in the building is monitored by the central equipment.・It was under control. However, this configuration required a central unit with large processing capacity, and in order to ensure system reliability, duplicating the central unit increased the cost of the system. Therefore, as a system configuration that solves the problems of the conventional centralized configuration, Mitsubishi Electric Technical Report, VOL. 60,111a5
, 1986, pp. 10-14, a paper entitled "Distributed Processing Building Management System" proposes a distributed configuration. In a distributed configuration, each terminal device is equipped with a microcomputer, and each terminal device has monitoring and control functions that were conventionally handled by a central device, thereby distributing risks and improving reliability. In addition, telephone lines can be used as signal transmission paths between central equipment and terminal equipment, improving expandability and
We are trying to reduce costs. In this way, when using a telephone line as a signal transmission path,
When the number of terminal devices increases, the amount of communication at the central device increases, and the amount of traffic (or call volume) on the line connected to the central device increases and becomes congested (traffic congestion).
If this problem progresses, there is a problem in that communication is no longer possible (deadlock). In addition, when the busy rate of the central unit increases due to congestion, the majority of methods use redial to attempt communication again.
The result was that the situation seemed to be even more congested. On the other hand, as a method for switching or detouring telephone exchange lines to control traffic, Japanese Patent Laid-Open No. 55-1403
No. 53, JP-A-57-133751, JP-A-57-1
No. 11163 and Japanese Unexamined Patent Publication No. 61-274556.

These known examples are divided into the following two types.

■ Understand the current line traffic status and change (switch) the connection to an available line.

■ Increase lines in anticipation of an increase in traffic.

When the above exchange line switching or detouring method is applied to a distributed system that uses lines limited to the central equipment,
Since the central equipment has to search for free lines one after another and make connections, when traffic increases, re-calls (re-dials) are often required, and as a result, traffic is not optimized and the problem is even worse. This will add to the excitement.

Furthermore, Japanese Patent Application Laid-Open No. 61-274556 discloses a detour method by switching the call route depending on the day and time of day.

[Problem to be solved by the invention]

In distributed systems (e.g., building management systems, bank online systems, etc.) that use the above-mentioned S-talk lines as signal transmission paths, there is a problem that congestion occurs on specific lines connected to the central equipment. was.

Furthermore, the method of line switching or detouring in the telephone exchange system does not optimize traffic, but has the problem of further accelerating congestion.

Next, the problems in Japanese Patent Application Laid-Open No. 61-274556 will be explained.

In this known example, a time period storage memory stores a table specifying a time period based on the time when a call occurs, a route number storage memory stores a route in a time period specified by the time period storage memory, and a time period storage memory. A route determining section having a function of determining the output trunk of the exchange based on information from a memory, the route number storage memory and the clock device is provided, and the time period and the route corresponding to the time period are stored in the memory in advance, and The routes of all calls that occur are switched at once. For this reason, since the route is switched according to the time zone, the concentrated traffic is also switched together, resulting in new traffic concentration on the switched route. This inevitably causes traffic imbalance between routes, which is not solved by the prior art.

An object of the present invention is to provide a distributed system that does not cause congestion during operation, and an information transmission method that can avoid traffic concentration.

[Means for Solving the Problems] The above purpose is to connect the central equipment and the exchange with at least two communication lines, the central equipment has different communication numbers, and the communication between the exchange and multiple terminal equipment. In a distributed system connected by communication lines, there is a means for detecting traffic on each communication line between the central equipment and the exchange, and a central unit used for transmitting traffic to each terminal equipment based on the detection result of the means. This can be achieved by providing means for specifying at least one of the transmission source of the device and the reception destination of the central device used when transmitting from each terminal device to the central device.

In addition, the above purpose is to detect the traffic of each communication line between the central equipment and the exchange in a distributed system, and to detect the transmission source of the central equipment and each terminal used when transmitting to each terminal equipment based on the traffic detection result. This is achieved by specifying at least one of the receiving destinations of the central device used when transmitting from the device to the central device.

[Effect]

In a distributed system, the line traffic between each terminal and the central unit is conducted in a similar pattern throughout the system, generally on a daily, weekly, monthly, or yearly basis. Therefore, by detecting the traffic on each communication line between the central equipment and the exchange, the degree of congestion (traffic concentration) on each communication line can be determined.

If the destination (receiving destination) and source are specified in advance for each terminal device or central device, automatic dialing will be performed each time a transmission is made based on the specified destination and source. By ensuring that the automatically dialed destination and source communication numbers do not overlap from time to time, the traffic on each communication line between the central equipment and the exchange is averaged out. That is, as a result of sorting the traffic on the communication line between the central equipment and the exchange into destinations and sources, the traffic capacity limit of a particular communication line is not exceeded, and as a result,
Traffic concentration can be avoided.

By avoiding traffic concentration, each terminal device,
The central device can send information to the central device or each terminal device as soon as it wants to send it.

〔Example〕

An embodiment of the present invention will be explained below with reference to FIG. In Fig. 1, 1 is a central device with two different communication numbers, 2 is a telephone exchange, 3 is each terminal device, 4 is a number of lines connected to the central device), and 5 is a number of N units connected to the central device. This is a line (one line) connected to each terminal device. FIG. 1 shows an example of a distributed system configuration in which telephone lines 4 and 5 of a telephone exchange 41k2 are used as signal transmission paths between the central device 1 and the terminal device [3. Examples of such systems include distributed terminal systems such as distributed building management systems, bank online terminal systems, and the like.

The basic concept of the present invention will be explained with reference to FIGS. 2 to 4. Note that for the sake of simplicity, the explanation is limited to the case where information is sent from the terminal device to the central device.

Figure 2 shows two lines (a
, b), it is assumed that four terminal devices 3A to 3D are assigned to each line as shown in the figure and traffic is generated. In this case, since the traffic volume (or call volume or number of calls) on line a is greater than the traffic volume on line b, the terminal equipment on line a [If the third 3G call occurs with a 0 mark, the 0 mark received by the central equipment with a delay. Therefore, in order to equalize the traffic on lines a and b based on the traffic pattern of each terminal device,
When the telephone number (communication number) of the central unit stored in the terminal device 3C is changed and the telephone line 4 used by the telephone exchange 2 is thereby changed from line a to line b, the traffic on line b will be as shown in FIG. Also, the traffic on line a is as shown in FIG. In FIG. 3, the delay of the terminal device 3C has disappeared. Furthermore, the traffic in FIGS. 3 and 4 is even. That is, by distributing and equalizing the traffic, the overlap of 1-rahic is reduced, the delay in transmission to the central device can be alleviated as a whole, and it is possible to avoid concentration of traffic on line a. On the other hand, from the opposite perspective, when lines a and b have traffic as shown in Figs. 3 and 4, for example, the next day terminal equipment W3
If it is expected that the traffic on D will increase (the number of alerts from terminal equipment 2 or 4 will increase), then the traffic between lines a and b should be set within a range that does not exceed the permissible traffic limit as shown in Fig. 2.
By making the traffic non-uniform (that is, assigning the terminal device 3C to line a in advance),
By avoiding traffic concentration on line b,
It becomes possible to average the traffic of b.

Although FIGS. 2 to 4 are diagrams in which all transmission destinations for a specific terminal device are switched, the transmission destination may be switched at a specific time of the day. In this case, a storage device may be used to switch the destination at a specific time and return to the original number after that time. This means that phone numbers are organized from time to time.

Furthermore, switching destinations involves determining in advance the sharing of information transmission over the communication line between the central equipment and the exchange. Therefore, it would be good if this division of labor could be reorganized and changed over time, as in Section E.

As long as the above basic idea is followed, it is possible to use call volume or number of calls instead of traffic volume, and to adopt various functional configurations.

FIG. 5 shows an example of the functional configuration of the central device 1 in FIG. 1, and FIG. 6 shows an example of the functional configuration of the terminal device 3 in FIG. 1.

The operation will be explained below with reference to FIGS. 5 and 6.

In FIG. 5, in measurement 11 of information ra and Th, the number of calls and the average holding time of each call 1A4 (4a, 4b) of the central device 1 are determined using, for example, the processing flow shown in FIG. Using the calculated number of calls and the average holding time of the lines 14a and 4b, the traffic amount calculation means 12 calculates the number of calls on the lines 4a and 4b according to the processing flow shown in FIG.
4b's traffic amount is determined. Traffic amount determining means
In step 3, the traffic volume is compared with the predetermined line capacity using the processing flow shown in Fig. 9, and based on the comparison result, the terminal device number and central The changed telephone number of the device is determined, and the communication control means 14 transmits the changed telephone number to the determined terminal device using, for example, the processing flow shown in FIG.

Note that the communication numbers (telephone numbers) of the central device 1 and the terminal device 3 will be explained. Regarding the central unit 1, the communication control means 14 has two ports, each port being connected to the telephone line 4a. 4b, respectively. Information I as a distributed system is transmitted through any of the port and telephone line pairs to which the central device 1 has a connection relationship from each terminal device 3.
a and Ib are transmitted and stored in storage means (not shown) within the central device 1. Therefore, the communication number within the central device or the destination of the central device also means specifying the port. For each terminal device, the communication control means 31 shown in FIG. 6 is provided with a port, and information is transmitted from the central device via the telephone line 5 connected to this port. The information is stored in a storage means (not shown).

Furthermore, in this embodiment, since the amount of information sent from the central device 1 to each terminal device 3 is significantly smaller than the amount of information sent from each terminal device 3, the central device 1 sends it to each terminal device 3. It was decided not to specify the port used in some cases.

The processing flow of each means for avoiding traffic concentration will be described in detail below.

In information Iae Ib measurement 11, the number of calls occurring on each of the lines 4a and 4b is counted, and the holding time of each call is measured and stored. An example of the processing flow is shown in FIG.

In Figure 7, after calculating the average holding time and number of calls at the previous time on the condition that the time has changed, a predetermined table is initialized and the sum of the number of calls and the number of calls on the line at the current time is measured. I try to do that. The number of calls and average holding time. (1),
It can be expressed by equation (2).

...(1) K K Where, THI: Holding time (seconds) of the i-th call 7th
The process shown in the figure (or equations (1) and (2)) is performed on lines 4a and 4.
By carrying out on b, information ■a, I%. Measure. Next, the information Ia and Ib are sent to the traffic amount calculation means 1.
Enter 2. An example of processing by the traffic amount calculation means 12 is shown in FIG. 8 and will be described below. Note that the numbers marked with 0 correspond to each step in the drawings.

■ Importing information Ia and Ib: First, import the number of calls and average holding time measured for lines 4a and 4b6 ■ Calculating the traffic volume of lines 4a and 4b ('rat')
rb): The traffic volume of lines 4a and 4b is expressed as follows (3
) is calculated using the formula. Traffic amount T = K X T h ・
...(3) Here, K: Number of calls (number of calls) Tk: Average holding time (seconds) It is also possible to use the following equation (4) to calculate the call volume. Call volume A=T/3600(erl.)
”・(4) Here, T: Traffic amount of line 4a calculated from above traffic amount T & and line 4
The traffic amount Tb of b is passed to the traffic amount determining means 13. An example of processing by the traffic amount determining means 13 is shown in FIG. 9 and will be explained below. ■ Taking in the traffic amounts T'a and Tb: The traffic amounts Ta and Tb are taken into the traffic amount determining means 13. ■ Comparison with the allowable amount: The allowable amount of traffic generated on the predetermined line TLHT, Ta, and Tb is calculated as shown in (5) below.
Compare by formula. Here, the setting of the allowable amount TLMT is arbitrary. In equation (5), it is assumed that both T& and Tb do not exceed T LMT. This is because if both of these exceed the allowable amount, it is considered that there is an insufficient estimate during planning and design, and therefore it can be said that the number of lines 4 connected to the central unit 1 has been increased. ■ Is it greater than the allowable amount? If it is less than the allowable amount, the telephone number of the central unit 1i1 stored in the terminal device 3 will not be changed, but if it is exceeded, it will be changed in (■). ■ Changing the telephone number of the central device 1 stored in the predetermined terminal device 3: In the case of Ta>TtMr (Tb<TLMT), first change the telephone number of the central device 1 as shown in FIG. ! The flag for “terminal device to change from line 4b to 4a” in the episode number change table is #
I Search for the IT terminal device number and set the flag to 1 if it is found.
1 0" and the terminal device number is stored in the change decision table together with the telephone number of line 4b (receiving number in the central equipment Iitl connected to line 4b). If there is no "next line 4a → Search for a terminal device number whose flag for “terminal device to be changed to 4b” is “O”, set the flag to “1”, and store that terminal device number in the change determination table along with the telephone number of line 4b. T b > T LMT (Ta.≦−TLMT)
In this case, it can be realized by reversing "a" and "b" in the above process.

The terminal device number determined above and the changed telephone number are passed to the communication control means 14 shown in FIG. The communication control means 14 executes the processing according to the processing flow shown in FIG. 11, for example. The processing flow is explained below. ■ Importing the terminal device number and the changed telephone number: Imports the terminal device number and the changed telephone number stored in the change determination table, and sets the changed telephone number in the receiving buffer. ■ Dial the telephone number (communication number) corresponding to the terminal device number: Find the telephone number of the corresponding terminal device from the terminal device number using the correspondence table in Figure 12, and go off-hook (equivalent to the action of picking up the handset). ) then dial. ■ Line connection with the terminal device: When the terminal device goes off-hook, the line is connected. Next, check the other party's terminal device. Various confirmation methods can be considered, such as a method where both have the same function, send data to a terminal device, and compare the returned answer with the answer from the central device. If the answer is wrong or there is no response, disconnect the line.

[Phase] Send data (changed phone number): After checking the terminal device, send the changed phone number stored in the transmission buffer.

■ ``Disconnecting'' the line with the terminal device: The line is disconnected (on-hook) after a predetermined period of time after data transmission is finished. As described above, the central equipment ill can send the changed telephone number to the predetermined terminal device 3. Next, the schematic operation of FIG. 6, which is an example of the functional structure of the terminal device 3 to which the changed telephone number has been sent, will be explained. Transfer the changed phone number to communication control means 3
The data is received according to FIG. 13, which is an example of the processing flow in step 1, and stored in the reception buffer. Next, using FIG. 14, which is an example of the processing flow of the telephone number changing means 32, the changed telephone number stored in the reception buffer is stored in the telephone number table. Below, each method will be explained in detail using an example of the processing flow. The communication control means 3l of FIG. 6 will be explained using the processing flow of FIG. 13. ■ Ring confirmation: Detects a ring signal a predetermined number of times and turns off the hook (equivalent to picking up the handset). ■ Confirmation of central equipment after off-hook: If confirmation data is not sent from central equipment 1 within a predetermined time after off-hook, the line is disconnected (goes on-hook). When confirmation data is sent, it is input into a predetermined function and the answer is returned. ■ Receive the data (@phone number after change) Receive the changed phone number to the secondary and store it in the reception buffer. ■ Disconnecting the line with the central device: After the reception is completed, the line is cut off (on-hooked). The changed telephone number received in the above manner is then passed to the telephone number changing means 32.

The telephone number changing means 32 executes, for example, the processing flow shown in FIG. The processing flow is explained below. ■ Importing the changed phone number: Importing the changed phone number stored in the reception buffer.

0 Store the changed phone number in the phone number table: Store the changed phone number in the phone number table. The above terminal installation ii! 3, the telephone number of the line of the central device 1 stored in the terminal device 3 is calculated based on the traffic volume (
It is changed depending on the call volume or number of calls). Further, the telephone number changing means 32 can also use a telephone number that is changed at the same time for all terminal devices at a fixed time. An example of the processing flow is shown in Figure 15. The processing flow is explained below. 0 Importing the changed phone number: Same as @.

0 Store the changed phone number in the phone number buffer table = Store the changed phone number in the phone number buffer table.

0 Set time timer: Set the time at which the changed phone number from the phone number buffer table to the phone number table is stored in the timer.

■ Storing the contents of the telephone number buffer table in the telephone number table: When the time set in 0 is reached, the timer starts processing 0, and the changed telephone number stored in the telephone number buffer table is stored in the telephone number table. Store in.

As described above, by using the processing flow example (Fig. 15) of the telephone number changing means 32, the changed telephone number can be used at the same time on all terminal devices whose telephone number is to be changed.
This has the effect of preventing local traffic concentration from occurring during the transition period associated with the change.

In the embodiment described above, the processing has been explained separately for each means, but it is obvious that part or all of the processing for each central device 1 or terminal device 3 can be executed at once.

Also. In this embodiment, the "changed telephone number" is directly used as the transmission data, but the same effect can be expected if the data corresponds to it.

For example, the terminal device 3 stores the telephone numbers of other lines connected to the central device 1, sends data specifying the corresponding telephone number from the central device 1, and changes it at the terminal device @3. It is conceivable to search for and use a later telephone number.This makes it possible to shorten the transmission time in the case of a long telephone number.

Another embodiment of the invention is shown in FIG.

FIG. 16 shows a telephone circuit 4 of the telephone exchange 2 (in this embodiment, an M line,
This is an example of the configuration of a distributed system when M 2) and 5 (one line each for N terminal devices, M<N) are used.

An example of the functional configuration of the central device 1 shown in FIG. 16 is shown in FIG. 17, and an example of the functional configuration of the terminal device 3 is shown in FIG. 18. In Fig. 7, the number of calls and average holding time measurement 11 for lines 1 to M of the central equipment are calculated using the processing flow shown in Fig. 20
(Fig. 21) and stored in the hold time table (Fig. 21). 1st
Although FIG. 9 is the same as the processing flow in FIG. 7, the data storage table for the calculated number of calls and average holding time is different, and here data for the past day can be used. The obtained data for one day is calculated by the traffic amount calculating means 12 using the processing flow shown in FIG. Store. On the other hand, the traffic amount of the line connected to the terminal device 3 calculated by each terminal device 3, which will be described later, is transmitted to the central device 1 via the communication control means 31 of the terminal device 3, and is transmitted to the central device 1 via the communication control means 31, which will be described later.
Through this process, the data is stored in the traffic volume storage table (FIG. 24) of the traffic volume storage means 15. The traffic amount of each line stored in the traffic amount storage means 15 is determined by the traffic amount determining means 13 using the processing flow shown in FIG.
The telephone number of the changed line of the central device 1 to be stored in the terminal device 3 is determined. Next, the communication control means 14 transmits the changed telephone number to each terminal device 3 according to the processing flow shown in FIG. 29, for example. Further, the communication control means 14 receives information from the terminal device 3 that is transmitted from the terminal device 3 according to the processing flow shown in FIG.
The amount of traffic for one day on the line is received and stored in the traffic amount storage table (Fig. 24-1).

Next, the general operation of the terminal device 3 will be explained below using FIG. 18. The process of receiving the changed telephone number of the central device 1 and storing it in the telephone number table can be realized using the processing flow of FIG. 13 and FIG. 14 or FIG. 15. In addition, in the measurement 33 of the number of calls and average holding time of the line of the terminal device 3, the seventh
Determine the number of calls and average holding time using the process flow shown in the figure.
Using the determined number of calls and the average holding time, the traffic amount calculation means 34 (for example, the processing flow shown in FIG. 31) calculates the traffic amount (or call f) using equation (3) or equation (4). The obtained traffic amount is stored for one day in the traffic amount storage means 35, and the upper day's worth is collectively sent to the central unit 1 by the communication control means 3 according to the processing flow shown in FIG.
Send to.

Next, detailed explanation will be given below using the processing flow of each means shown in FIGS. 17 and 18.

In figure 7, measurement 11 of the number of calls and average holding time, line 41
The number of calls occurring in each of m4z to 4M is counted, the line holding time of each call is measured, and the result is stored in a call number table and a holding time table for each call m4z to 4M.

An example of the processing flow is shown in FIG. The 9th engineering drawing is
This is a processing flow when calculating the number of calls and average holding time for any one line, and this is calculated for lines 41 to 4M.

The outline of the processing flow is that, on the condition that the time has changed, the number of calls and average holding time at the previous time are calculated, then the counter and clock time are initialized, and the number of calls and holding time on the line at the current time are measured. I try to do that. The number of calls and average holding time are (1
) and (2).

The traffic amount calculation means 12 is, for example, shown in FIG. Operate according to the processing flow. Next, FIG. 22 will be explained.

■ Importing the number of calls and average holding time: Importing the number of calls and average holding time for all times corresponding to line 41 in the number of calls table in Figure 22 and the holding time table in Figure 21. ■ Line 4. Calculation of traffic amount (T■,): Line 4
The traffic amount of 1 is calculated using equation (6).

Traffic amount Tm, t= K-, tX Tke. t
-(6) Here, m: line number (1 distortion m) t: time (t=o, L..., 23) K mlt: line 4m, number of calls at time t Tk■
t: Line 4. , the average holding time at time t. It is also possible to calculate the traffic volume using equation (7) and use it instead of the traffic volume.

Call volume A. , t=T. ,t/3600(erl.)
・=(7) Here, T■t: Line 4. , the line 4 determined by the traffic amount at time t or more. , time t(=O,].,?・
, 23) is stored in the traffic amount storage table of FIG. 23, which is a traffic amount storage means.

■ End or two lines 4. If (initial value: 1) satisfies equation (8), the process ends; if not, m=m+1 and returns to step (2).

m冫-M...(8)
In this way, the traffic volume T at each time of the day
■, is calculated for all lines, and the traffic amount storage means l5
It is stored in FIG.

Next, the traffic amount determining means 13 selects the traffic amount storage table (23rd.
Using the traffic volume shown in Figure 24), the terminal devices 3 that use each of the lines 41 to 4M) of the central unit @1 are assigned. Second
FIG. 5 is a processing flow showing the above example. Below is the second
The processing flow shown in FIG. 5 will be explained.

(2) Find the peak amount in the traffic amount storage table shown in FIG. 23, which is the traffic amount storage means 15, and find the time of the peak amount.

■ Traffic amount H n p t sent in advance from the terminal device in FIG. 24, which is the traffic amount storage means 15
From the traffic volume storage table that stores , increase the traffic volume of each terminal device 3 at the time determined in
Lines 41 to 4M as shown in Table 1 below.
(M (in case of H).

Table 1 Where, Hn1+t>Hn2+t>”'>HnM+t>
HnM+sHt>...> Hns+t (or H
nl+t<Hn2, t<”'<HnM+t<-HnM
"t+t<1...<H nN l t) Furthermore,
Total traffic amount and allowable amount TL allocated to each line
MT and confirm that it is below the line's capacity. For example, the case of 4 lines is shown in equation (9). Hy+x+t+Hy+o+xpt<TLMT
...(9) If equation (9) is not satisfied, H
nM"t+t is set to line 42, and the same steps are performed sequentially thereafter.

Next, the terminal devices to be assigned to each line are determined as shown in the table below based on the correspondence between the allocated traffic amount and the terminal device 3. Table 2 The telephone number of the line assigned to each terminal device is obtained from FIG. 27 and stored in the table of corresponding terminal device numbers in FIG. 26.

The changed telephone number (FIG. 26) of the central unit 1 stored in each terminal device 3 determined by the traffic amount determining means 13 is passed to the communication control means 14 and transmitted to each terminal device 3. An example of the processing flow of the communication control means 14 is shown in FIG.

FIG. 29 will be explained below.

@ Q=1:<Recurring variable Q(=1, 2, 3,...
, N). ■ Import the terminal device number and the changed telephone number to be sent to it from the allocation change table, and store the changed telephone number in the transmission buffer. ■ For example, import the telephone number of the terminal device number from the correspondence table shown in Figure 28,
After going off-hook, dial.

■ Line connection with the terminal device (confirmation of the terminal device): When the terminal device 3 goes off-hook, the line is connected. Next, the other party's terminal device 3 is confirmed. Various confirmation methods can be considered, such as a method where both the central device 1 and the terminal device 3 have the same function, send data to the terminal device 3, and compare the returned answer with the answer from the central device It. There is. If the answer is wrong or the answer is not returned within the specified time, the line will be disconnected (
off-hook). [Phase] Send data (changed telephone number): After confirming terminal device a, transmit the changed telephone number stored in the transmission buffer.

■ ``Disconnect'' the line with the terminal device: After completing data transmission, disconnect the line after a predetermined period of time (on-hooks). ) If it is greater than or equal to N, the process is terminated, and if it is less than 0, it is processed as 0.On=n+1: Set the terminal device number to the next number (Q+1) and return the process to ■. The changed telephone number can be sent to all terminal devices.Meanwhile, the communication control means 14 receives the traffic amount from the terminal device 3, and stores it in the traffic amount storage table (FIG. 24) of the traffic monitoring and storage means 15. An example of this is shown in Fig. 30. Fig. 30 will be explained below. ■ Confirmation of calling: After detecting the calling signal a predetermined number of times,
Off the hook. ■ Confirmation of terminal device after off-hook: If confirmation data is not sent from the terminal device 3 within a predetermined time after off-hook, the line is disconnected (on-hook). When confirmation data is sent, it is input into a predetermined function and the answer is returned.

0 Receive data (terminal device number, traffic amount, time): Receive the terminal device number, time, and traffic amount and store it in the reception buffer.

0 ``Disconnect'' the line with the terminal device: After reception is complete, disconnect the line (on-hook). (2) Store the traffic volume stored in the reception buffer in the corresponding location of the traffic volume storage table (FIG. 24) corresponding to the terminal device number and time stored in the reception buffer.

As described above, with the functional configuration of the central device 1 shown in FIG. 17, the changed telephone number can be sent to each terminal device 3, and the terminal device! The traffic amount from if3 can be received and stored in the traffic amount storage means 15.

Next, the operation of the terminal device 3 shown in FIG. 18 will be explained. FIG. 18 shows an example of a functional configuration for calculating and transmitting a traffic amount, and an example of a functional configuration for receiving and storing a changed telephone number.

The receiving process of the communication control means 31 in FIG. 18 can be realized by the same process flow as that of FIG. 13, and the telephone number changing means can be realized by the same process flow as that of FIG. 14 or 15.

The measurement 33 of the number of calls and average holding time can be realized, for example, by the processing flow shown in FIG. 7 described in the previous embodiment.

The traffic amount calculation means 34 can be realized by the processing flow shown in FIG. 31, for example.

FIG. 31 will be explained below.

0 Importing the number of calls and average holding time: Importing the number of calls and average holding time obtained in the process flow shown in FIG. 4 earlier.

O Calculation of traffic amount H: Calculate the traffic amount using equation (3). It is also possible to calculate and use the traffic volume using equation (4). The calculated traffic amount is
The traffic amount table shown in FIG. 32 is stored in correspondence with the time.

If the traffic amount determined in the above manner is equal to 24 hours, the communication control means 31 transmits predetermined data (terminal device number, time, traffic amount) to the central device 1 through a transmission process. FIG. 33 shows an example of a processing flow at the time of transmission by the terminal device.

FIG. 33 will be explained below.

■ Retrieving each time in the traffic amount table and its traffic amount: Retrieving each time in the traffic amount table and the corresponding traffic amount, and storing it in the transmission buffer.

0 Store the own terminal device number in the transmission buffer.

The storage format in the sending ffl buffer is, for example, the third one.
4 Do as shown in Figure 4.

0 Dial the telephone number in the telephone number table: After going off-hook, dial the telephone number of the central unit stored in the telephone number table.

■ Line connection with the central device (confirmation of the central device): The confirmation method is carried out in the same manner as (■) in Fig. 29 of this embodiment. However, the terminal device 3 and central device 1 are replaced and executed. ■ Send data in the sending buffer: After confirming the central unit [1], send the data shown in FIG. 34 stored in the sending buffer.

[Phase] ``Disconnect'' the line with the central device: Finish sending data and disconnect the line after a predetermined period of time (on-hook)
．． In the other embodiments described above, the processing has been explained separately for each means, but it is obvious that a part of the processing for each central device 1 or terminal device 3 can be performed all at once.

Furthermore, by transmitting data corresponding to the changed telephone number and converting it into a telephone number on the receiving side, it is effective to shorten the transmission time when the telephone number is long.

Furthermore, the permissible ffl of the line corresponding to the telephone number stored in the terminal device where the traffic volume is expected to increase
By changing (TL.MT in equation (9)) and comparing with equation (9), it is possible to prepare for an increase/decrease in the amount of traffic.

Furthermore, in this embodiment, each terminal device 3 calculates the traffic amount, but by calculating the traffic amount of each terminal device 3 in the central device 1 based on the communication amount from the terminal device M3, Measurement of the number of calls, calculation of traffic volume, storage means, and communication means at the terminal device 3 can be eliminated.

Furthermore, another embodiment of the present invention is shown in FIG.

FIG. 35 shows a signal transmission line 7 (for example, RS-232C or RS-4
22, etc.), and furthermore, the central device 1 and the terminal device 3
and are connected via telephone exchange 2 through lines 4 and 5. In FIG. 35, the time to connect to the central device 1, tlt4
is M line, and N terminal devices 3 (M<N) are line 5.
An example is shown where they are connected.

Next, the general operation of this embodiment will be explained. The central unit [1] and the modified central unit 1 transmit the traffic amount calculated by each terminal device 3 to the processor 6 via the central device 1, and the processor 6 uses the traffic amount to store it in each terminal device 3.
determine the telephone number of each terminal device 3 via the central device 1.
It operates so that the telephone number stored in each terminal device 3 can be changed.

FIG. 36 shows an example of the functional configuration of the central device 1 in FIG. 35, FIG. 37 shows an example of the functional configuration of the terminal device 3, and FIG. 38 shows an example of the functional configuration of the processor 6.

In FIG. 36, the traffic volume of each line 4 connected to the central device 1 is determined and stored in the traffic volume storage means 15. On the other hand, the line 5 connected to each terminal device 3
The traffic amount is determined by each terminal device 3, received by the central device 1, and stored in the traffic amount storage means 15. When the central device 1 stores the traffic amount of all lines, it transmits the traffic amount to the processor 6 via the communication control means 16.

In order to realize the above operation, the number of calls and average holding time measurement 11, traffic amount calculation means 12, and traffic amount storage means 15 are provided as in FIG. 17, and the communication control means 16 with the processor 6 is newly provided. It was established. Since the means similar to those shown in FIG. 17 have been explained in the other embodiments, the newly added communication control means 16 with the processor 6 will be explained below.

FIG. 39 shows an example of the processing flow of the communication control means 16 when transmitting, and FIG. 41 shows an example of the processing flow when receiving.

An example of the processing flow shown in FIG. 39 will be described next.

■ Initialization: Set the initial values for the line that transmits data.

■ Traffic volume storage table (Figures 23 and 24)
The time and traffic amount of the specified line (central device: 1 to M, @ non-device: 1 to N) are captured.

(2) Store the captured traffic amount in the transmission buffer together with predetermined information in the format shown in FIG.

■ Sends a reception request to processor 6 and confirms completion of reception preparation.

■ Send the data stored in the transmission buffer to the processor 6.

■ Data transmission completed: Check whether all data transmission in the traffic volume storage table has been completed (10), (11)
Determine by formula.

In the case of central device 1 data (Table 3), specified line ≧ -M
...(10) In the case of the data of terminal device 3 (Table 4), the designated line 2N
...(1l) The process ends when formulas (10) and (11) are satisfied, and if they are not satisfied, the next line is specified and the process returns to (■).

Next, when transmitting data from the processor 6 to the central device 1,
In other words, the processing at the time of data reception in the central device 1 is performed in the 41st
This will be explained using the flow shown in the figure.

■ Receives a reception request from the processor 6 and enters reception mode (clearing the reception buffer, etc.).

■ Receive the data (Fig. 42) and store it in the reception buffer.

■ Store the data received in the reception buffer in the allocation change table shown in FIG.

The data stored in the allocation change table transmits the changed telephone number to each terminal device 3 according to the flow of the communication control means 14 shown in FIG.

The functional configuration of each terminal device 3 shown in FIG. 37 is the same as that in FIG. 18, and is executed based on the description of the other embodiments described above.

In the processor 6, as shown in FIG.
The communication control means 63 receives the traffic amount transmitted from the terminal device, and stores it in the traffic amount storage means 61. After receiving the entire traffic amount, the traffic amount determining means 62 determines the changed telephone number to be stored in the terminal device. . The determined changed telephone number is transmitted by the communication control means 63 to the terminal device 3 via the central device 1.

The traffic amount storage means 6 and the traffic amount determination means 62 in FIG. 38 have the same functions as those in the embodiment shown in FIG.
A new communication control means 63 is provided to exchange information.

The communication control means 63 will be explained below.

FIG. 43 shows an example of the processing flow of the communication control means 63 when transmitting, and FIG. 44 shows an example of the processing flow when receiving.

FIG. 43 is an example of a processing flow for transmitting the contents of the allocation change table (FIG. 26) obtained by the processor 6 to the central device 1, which will be described below.

[Phase] Processor 6 allocation change table (26th
Import the data shown in Figure).

■ Send a reception request to the central device l and confirm that it is ready for reception.

■ Send the contents of the transmission buffer to the central device 1.

As described above, the changed telephone number of each terminal device 3 determined by the processor 6 can be transmitted to the central equipment rIil. on the other hand,
FIG. 44 shows an example of a processing flow in which the processor 6 receives transmission data such as the amount of traffic from the central device 1. FIG. 44 will be explained below.

0 Receives a reception request from the central device 1 and enters reception mode (clearing the reception buffer, etc.).

0 Receives data from the central unit l in the format shown in Figure 40 and stores it in the reception buffer.

(2) From the contents of the reception buffer, the received traffic amount is stored in the position of the traffic amount storage table corresponding to the type and time.

As described above, the processor 6 can receive the traffic amount of all the lines stored in the central device 1 and store it in the traffic amount storage table (FIGS. 23 and 24).

Furthermore, another embodiment of the present invention is shown in FIG.

In FIG. 45, the traffic volume of each line of the central equipment 1 and the terminal equipment 3 measured by the telephone exchange 2 (in particular, a private telephone exchange) is measured by the signal transmission line 8 (for example, RS-232C or RS-422, etc.). This example shows an example of a configuration in which the data is imported into the central unit 1 via the system.This eliminates the need to calculate the traffic volume by measuring the number of calls and average holding time. FIG. 46 shows an example of the functional configuration of the central device 1, and FIG. 47 shows an example of the functional configuration of the terminal device. The detailed operation includes measuring the call volume and average holding time, providing means 17 for inputting the traffic volume in place of the traffic volume calculating means, and storing the input traffic volume in the traffic storage means (Figs. 23 and 24) 15.
This differs from the other embodiments described above in that the data is stored in .

Furthermore, another embodiment of the present invention is shown in FIG.

FIG. 48 shows that the amount of traffic on the lines of the central device 1 and each terminal device 3 measured by the telephone exchange 2 (in particular, a private branch exchange) is input to the processor 6, and the processor 6 uses the traffic amount determining means to determine the amount of traffic on the lines of the central device 1 and each terminal device 3. The central device 1 obtains the changed telephone number of the central device stored in the central device 1, and transmits the obtained changed telephone number to each terminal device 3 via the central device 1.

Although various embodiments of the present invention have been described above, various configurations can be adopted as long as the basic idea of the present invention is followed.

Furthermore, it is obvious that more flexible measures can be taken by returning the telephone number of the central unit stored in each terminal device to its original state after traffic concentration has been avoided.

In addition, when using an analog telephone line, the central equipment 1,
A modem may be interposed between each terminal device 3 and the telephone lines 4 and 5.

〔Effect of the invention〕

According to the present invention, it is possible to avoid concentration of traffic on a particular line due to changes in traffic (or call volume or number of calls) on each line, thereby eliminating line congestion.

In addition, it is possible to prevent the line from going down due to overcapacity of the line being used.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the distributed system of the present invention, FIGS. 2 to 4 are diagrams showing the basic idea of the present invention, and FIG.
The figures are a diagram showing an example of the functional structure of the central device of the embodiment shown in FIG. 1, FIG. 6 is a diagram showing an example of the functional structure of the terminal device of the embodiment shown in FIG. 1, and FIG. FIG. 1 is a flowchart showing an example of processing for calculating the number of calls and average holding time in one embodiment, FIG. 8 is a flowchart showing an example of processing by the traffic amount calculation means in FIG. FIG. 10 is a flowchart showing an example of the processing of the traffic volume determining means in FIG. 5, FIG. 10 is a diagram showing an example of the structure of the telephone number change table in FIG. 5, and FIG. Flow diagram, part 12
13 is a flowchart showing an example of processing by the communication control means of the terminal device, and FIG. 14 is a flowchart showing an example of processing by the telephone number changing means of the terminal device. 15 is a flowchart showing another processing example of the telephone number changing means of the terminal device, FIG. 16 is a diagram showing another embodiment of the distributed system of the present invention, and FIG. 17 is shown in FIG. Diagram 1 showing an example of the functional configuration of the central device of another embodiment.
FIG. 8 is a diagram showing an example of the functional configuration of the terminal device in another embodiment shown in FIG. Figure, 2nd
0 is a diagram showing the structure of the call number table in another embodiment of FIG. 17, FIG. 21 is a diagram showing the structure of the hold time table in another embodiment of FIG. 17, and FIG. 23 is a flowchart showing a processing example of the traffic amount calculation means in the central unit of the other embodiment shown in FIG. 25 is a flowchart showing a processing example of the traffic amount determining means in the central unit of the other embodiment of FIG. 17, and FIG. 26 shows an allocation change table. 27 is a diagram showing the correspondence between central equipment lines and telephone numbers, FIG. 28 is a diagram showing a correspondence table between terminal equipment numbers and telephone numbers, and FIG. 29 is another implementation of FIG. 17. FIG. 30 is a flowchart showing an example of the transmission processing of the communication control means in the central device of the embodiment shown in FIG. 17, FIG. Fig. 18 is a flowchart showing an example of processing for determining the number of calls and average holding time and calculating the traffic amount using the terminal device of another embodiment, Fig. 32 is a diagram showing the traffic amount table of the terminal device, and Fig. 33 is FIG. 18 is a flowchart showing an example of the transmission processing of the communication control means in the terminal device of another embodiment shown in FIG. A diagram showing an example of a storage format, FIG. 35 is a diagram showing still another embodiment of the distributed system of the present invention,
FIG. 36 is a diagram showing an example of the functional configuration of the central device of still another embodiment shown in FIG. 35, FIG. 37 is a diagram showing an example of the functional configuration of the terminal device of still another embodiment shown in FIG. 35, 38th
This figure shows an example of the functional structure of the processor of still another embodiment shown in FIG. 35, and FIG. 39 shows the transmission process of the communication control means from the central device to the processor of still another embodiment shown in FIG. 36. FIG. 40 is a flowchart showing an example, and FIG.
The figure is a flowchart showing an example of reception processing in the central device of still another embodiment shown in FIG. 36, and FIG. 42 shows an example of transmission data from the processor to the central device of still another embodiment shown in FIG. FIG. 43 is a flowchart showing an example of transmission processing of the communication control means in the processor of still another embodiment in FIG. 36, and FIG. 44 is a flowchart showing communication in the processor of still another embodiment in FIG. FIG. 45 is a flowchart showing an example of reception processing of the control means, FIG. 45 is a diagram showing the structure of still another embodiment of the distributed system of the present invention, and FIG. 46 is a diagram showing the central unit of still another embodiment shown in FIG. 45. Diagram showing an example of the functional structure of
7 is a diagram showing an example of the functional configuration of the terminal device of still another embodiment shown in FIG. 45, and FIG. 48 is a diagram showing the configuration of still another embodiment shown in FIG. 45. l... Central equipment, 2... Telephone exchange, 3... Terminal equipment, 4... Line (central equipment side), 5... Line (terminal equipment side), 6... Processor, 7 ...Signal transmission path, 8...Signal transmission Fig. 1 Fig. 2 Fig. 3 {Yasue equipment. 3B~301 4th Figure 4Ia (Terminal device 3Al time station 6 Figure 3: Processing flow C::: Data flow 7 Figure 8 Figure 10 Figure 11 Figure 12 Figure 1, 8 ■ Fig. 13 Fig. 15 Fig. 16 Fig. 19 Fig. 20 Fig. 21 Fig. 22 Fig. 23 Fig. 24 Fig. 26 Fig. 27 Fig. 28 Fig. 29 Fig. 30 Fig. 3l Fig. 32 Fig. 33 Fig. 34 Fig. 35 Fig. 37 Fig. l Fig. 38 (= : Processing flow: Data flow ” If the line number ゛type is ゜0“, ゛1~M゜type power 1'
In the case of l-N, +0+ Fig. 41 Fig. 42 Fig. 43 Fig. 44 Fig. 45

Claims (1)

[Claims] 1. The central device and the exchange are connected by at least two communication lines, the central device is provided with a different communication number for each connected communication line, and the central device is provided with a different communication number for each connected communication line. In a distributed system in which the communication lines are connected to each other by communication lines, means for detecting traffic on each communication line between the central equipment and the exchange, and transmitting information to each terminal equipment based on the detection result of the means 1. A distributed system comprising means for specifying in advance at least one of the communication number of the central device used when transmitting information from each terminal device to the central device and the communication number of the central device used when transmitting information from each terminal device to the central device. 2. The distributed system according to claim 1, wherein the traffic detection means and the communication number designation means are provided in either the central device or the exchange. 3. In the distributed system according to claim 1, the traffic detection means is provided in the central device and each terminal device, and stores the traffic transmitted to the other party, and the communication number designation means is provided in the central device and each terminal device. A distributed system characterized in that it is provided in any one of the above or a processor attached thereto, and obtains traffic from each of the traffic detecting means and specifies a communication number. 4. In the distributed system according to claim 1, the communication number is the number of a port in the communication control means of the central device, and a communication line between the central device and the exchange is connected to each port. A distributed system with 5. The distributed system according to claim 1, wherein the exchange is a telephone exchange and the communication number is a telephone number. 6. The distributed system according to claim 1, wherein the traffic detection means comprises a traffic storage means and a traffic amount calculation means. 7. In the distributed system according to claim 1, the traffic for each communication line between the central equipment and the exchange is determined by the number of calls occurring on each communication line, the number of calls and holding time, or the average holding time, and the number of calls and holding time, or A distributed system characterized by detection based on either average holding time or observation time. 8. The central equipment and the exchange are connected by at least two communication lines, the central equipment is equipped with a different communication number for each connected communication line, and the exchange and the plurality of terminal devices are connected by each communication line. In a connected distributed system, means for detecting traffic on each communication line between the central equipment and the exchange, and communication of the central equipment when transmitting information to each terminal equipment based on the detection result of the means. 1. A distributed system comprising means for specifying in advance at least one of a communication number and a communication number of a central device used when transmitting information from each terminal device to the central device, together with a transmission time zone. 9. The distributed system according to claim 6, wherein the traffic detection means detects the traffic of each communication line between the central device and the exchange throughout the day, week, month, or year. distributed system. 10. The central equipment and the exchange are connected by at least two communication lines, the central equipment is equipped with a different communication number for each connected communication line, and the exchange and the plurality of terminal devices are connected by each communication line. In a connected distributed system, the traffic on each communication line between the central equipment and the exchange is detected, and the traffic on each communication line between the central equipment and the exchange is equalized based on the detection results. like,
A distributed system characterized in that it is provided with means for specifying a communication number of a central device serving as at least one of a transmission source and a transmission destination. 11. The central equipment and the exchange are connected by at least two communication lines, the central equipment is equipped with a different communication number for each connected communication line, and the exchange and the plurality of terminal devices are connected by each communication line. In a connected distributed system, the traffic on each communication line between the central equipment and the exchange is detected, and the traffic on each communication line between the central equipment and the exchange is detected in advance and A distributed system comprising means for specifying a communication number of a central device serving as at least one of the transmission destinations. 12. In a distributed system in which the central equipment and the exchange are connected by multiple communication lines, and each exchange has a greater number of terminal devices than the number of communication lines, each of which is connected to the central equipment and the exchange through communication lines. A distributed system characterized in that each communication line between the two is provided with means for determining in advance the division of information between the central device and which terminal device the information is to be transmitted. 13. The distributed system according to claim 12, wherein the means for determining the assignment is configured to change the assignment over time. 14. The central equipment and the exchange are connected by at least two communication lines, the central equipment is equipped with a different communication number for each connected communication line, and the exchange and the plurality of terminal devices are connected by each communication line. In a connected distributed system, the communication number of the central device and each terminal device when detecting the traffic of each communication line between the central device and the exchange and transmitting information to each terminal device based on the detection result. 1. An information transmission method characterized in that at least one of the communication numbers of a central device is specified in advance when information is transmitted from the central device to the central device. 15. In the information transmission method according to claim 14, when an increase in traffic from a specific terminal device is predicted based on the traffic detection result, the traffic limit of each communication line between the central device and the exchange is not exceeded. , an information transmission method characterized in that a specific communication number is assigned to the specific terminal device in advance. 16. The information transmission method according to claim 14, characterized in that, when a communication number is specified, the central device and each terminal device change the previously stored communication number to the specified communication number. Information transmission method. 17. The information transmission method according to claim 14, wherein the communication number is specified together with the time period of information transmission. 18. In the information transmission method according to claim 14, when the communication number is specified along with the time period for information transmission, the central device and each terminal device transmit the communication previously stored immediately before the specified time period. An information transmission method characterized in that the number is changed to a specified communication number, and immediately after the specified time, the number is changed back to the previously stored communication number. 19. The central equipment and the exchange are connected by at least two communication lines, the central equipment is equipped with a different communication number for each connected communication line, and the exchange and the plurality of terminal devices are connected by each communication line. In a connected distributed system, the communication number of the central device and each terminal device when detecting the traffic of each communication line between the central device and the exchange and transmitting information to each terminal device based on the detection result. 1. An information transmission method characterized by organizing a communication number of a central device in advance together with a time period for information transmission when transmitting information from a central device to a central device.