JPS58101549A - Traffic controlling system for service overall exchange - Google Patents

Abstract

PURPOSE:To regulate calls depending on the service class, by measuring calls given in the unit time per service class, based on the ratio of the said calls to the specified calls per predetermined service class. CONSTITUTION:Each word in a memory 21 corresponds to the service class, and the number of calls of the said service is stored in a field 22 of each word and a specified number of calls is stored in a field 23. When a terminal makes a call and the service class is discriminated through the analysis of calls, an address is given to an address line 26 and a signal in which 1 is added to the field 22 of the said word and the result is stored in the same address again is given to a control line 27. After a prescribed time, a signal which reads out the content of the memory 21 sequentially, calculates the ratio of the number of calls to the specified number of calls at an operation circuit 25 and registrates the ratio of the number of calls to the specified number of calls to a register 28, when the said ratio is a threshold value or over, is given to a control line 27. When a call is generated and the service class is discriminated with the analysis of the call, the service class is indicated on a line 38, a comparison circuit 29 compares the service class with that registered in the register 28, and when they are coincident, a signal is given to a regulation signal generating circuit 31 generates a regulation signal.

Description

[Detailed Description of the Invention] The present invention relates to traffic control in which when abnormal traffic is added in a service integrated switch, it is regulated by service type, and in particular, the number of calls added per unit time for each service type is determined in advance. This invention relates to a traffic control system for a general service exchange that regulates outgoing calls by service type based on the ratio of each service type to the prescribed number of calls.

Traditionally, exchanges were dedicated to each service, such as telephone exchanges, fax i9 exchanges, and data exchanges.
Recently, with the development of digital switching technology, it has become possible to put into practical use general service switching equipment that handles various services in the same exchange format, and economicalization through integration is expected. If traffic exceeds the design level on the general service exchange, 114 calls will be made.
The processing capacity of the switching equipment decreases because the number of calls is reduced and the number of incomplete calls increases. For this reason, it is conceivable to restrict outgoing calls to the general service exchange, as implemented in conventional exchanges. However, the conventional method uniformly regulates calls for various services, and although it is effective against overloads where traffic increases uniformly,
For example, when the number of 7-axis repair services increases and becomes overloaded, other service calls that can become completed calls, such as data service calls and telephone service calls, are often restricted.

In order to solve these drawbacks, the present invention measures the number of calls added per unit time for each service type, and based on the ratio of the number of calls to the predetermined number of calls for each service type, calls are made for each service type. The drawings will be explained in detail below.

FIG. 1 shows an example of the configuration of a service integrated converter, in which 1 is a communication path, 2 is a central processing unit, and so on. I4 telephone terminal, 4
is a factor <lJm terminal, 5 is a composite terminal including telephone and data terminal functions, 6 is a telephone line, 7 is a data line, 8 is a storage trunk for facsimile signals, and 9Fi facsimile line.

For example, facsimile service traffic has increased rapidly,
If the storage trunk 8 becomes congested and the number of incomplete calls increases, the switching process will be used ineffectively and the service of the telephone number will deteriorate significantly. In this case, by restricting only facsimile service calls, other services can be processed normally and the communication capacity of the exchange can be maintained at a high level. FIG. 2 shows an embodiment of the present invention, in which 21 is a memory, 22.25 is a field for each word in the memory 21, 24 is a specific address in the memory 21, and 25F
i arithmetic circuit, 26 is memory 21 address line, 27#
i.

Control line, 28 is a register for the digit, ~29 is a collation circuit, 5
0 is an AND circuit, 61 is a regulation signal generation circuit, 32 is a continuation of the memory 21, an input line, 35, 34, 35, 36,
57 is an output line, 68 is an input line indicating the service type, 59
is an input line indicating the switch width. It corresponds to each word line service type in the memory 21, and the field F22 of each word stores the number of calls to which the service is added, and field 23 stores the prescribed number of calls. When the terminal makes a call and the service selection is determined from the call analysis code, the address corresponding to the service is shown on the address line 26, and the control line 27 shows the field 22 containing the contents of the address by adding 1 and repeating the same. A signal is given to store at the address. The specified number of calls is set in advance in the field 23. After a certain period of time has elapsed, the contents of the memory 21 are sequentially read out and the ratio between the number of added calls and the specified number of calls in the field 22.25 is displayed on the control line 27. number / specified number of calls), clear field 22,
Further, when the ratio is above a threshold value, the service type is registered in the register 28, and if the ratio of the service registered in the register 28 is below a certain value, a signal is given from the register 28 to delete the service. As a result, service types for which the ratio is greater than or equal to a certain value are registered in the register 28.

When a call is made and the service type is determined by the call analysis, the service type is indicated at the input In1I38, and the comparison circuit 2
9 The ratio of the service registered in the Fi register 28 is compared with the service type whose ratio is above a certain value, and if there is a match, the output line 55 becomes logic @1". At this time, the exchange However, when the input line 39 is at logic ``1'', the output line 36 is at logic ``1'', and when the output line 56 is at logic ``1'', the regulation signal generation circuit 31 operates with a preset probability. Output 37 is set to logic "1" to indicate that the call is restricted.

Call processing program 2 reads the output from output line 37;
The call is restricted. Restricted calls must be counted as the number of additional calls mentioned above! There is no forest.

For example, when the number of facsimile service calls increases, the ratio of (number of added calls)/(specified number of calls) of the facsimile service exceeds a threshold value, and the facsimile service is registered in the register 28. At this time, if the exchange is overcrowded, only facsimile service calls are regulated at a separately determined regulation rate, and other service calls are not unnecessarily regulated.

The switch width may be determined by the conventional means of checking the incoming call buffer during all calls in the central processing unit. In addition, as a regulation method, in the above example, the service type was categorized by occupation through outgoing call analysis, and then it was determined whether the call was subject to regulation. It is also possible to regulate that the subscriber circuit of the service is disconnected from the exchange when the need arises. The prescribed number of calls to be stored in the field 23 may be set, for example, to the number of calls within a unit time (period for calculating the ratio) in the design load.

As explained above, the present invention measures the number of calls added to a service type at a fixed period, calculates the ratio to the specified number of calls, and when the exchange is congested, services for which the ratio exceeds the fixed value Since this system restricts only calls that belong to a certain type, the direct cause of switch congestion can be eliminated and the switch can be operated efficiently.

[Brief explanation of the drawing]

Figure 1 shows an example of a general service exchange, and Figure 2 shows an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Communication channel, 2... Central processing unit, 6... Telephone terminal, 4... 7 Aku i9 terminal, 5... Composite terminal,
6...Telephone line, 7...Data line, 8...Storage trunk, 9...Facsimile line, 21...Memory, 22.23...Field, 24...Specific address, 25 ...Arithmetic circuit, 26...Address line, 27
. . . Control line, 28 . . . Register, 29 .
36.57...Output 114, ss, sq...Input line Patent applicant Nippon Telegraph and Telephone Public Corporation Patent attorney Hisashi Tamamushi Department 111 (5 others)
! I1 2nd Figure 223-

Claims (1)

[Claims] In the general service exchange, measure the number of calls added for each service type of the general service exchange, and calculate the ratio of the number of calls added for each service type to the prescribed number of calls for each service type separately determined in a certain period, A traffic control method for a general service exchange, characterized in that when the traffic of the general service exchange is detected, calls that are added to a service type in which the ratio exceeds a separately determined threshold are regulated.