JPS63125088A - Data access system in multi-switching system - Google Patents

Abstract

PURPOSE:To change only a sub-routine only for a data access at the time of changing the type and the structure of data by making a data reading sub-routine and abstracting the data in a high order program for analyzing and processing. CONSTITUTION:An exchange A and an exchange B manage respectively subs subscribers a1-an, b1-bn individually play a switching function. Further the exchanges A, B use a common line C to deliver the data and execute one complete switching operation as a whole. The exchanges A, B have the plural sub-routine Sa1-Sam, Sb1-Sbm only for the data access and the high order programs Pa, Pb for calling them and analyzing and processing required for a switching control. The high order programs Pa, Pb, when certain/data is required in a logical development, declare a previously commonly defined data name, call the proper sub-routine and obtain the data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data access system in a multi-switching system in which electronic switching systems using a storage program type are connected in various forms such as a mesochet type and a loop type.

[Conventional technology]

Traditionally, switching software in electronic exchanges identifies data types and structures and logically develops them whenever necessary for each analysis and processing program in the switching software, even though the data types and structures are complex. We are conducting
Differences in the structure of the data appeared in various parts of each program that performed the analysis and processing necessary for exchange control.

[Problem that the invention seeks to solve]

Multiple exchanges are mesh type, mainly for the purpose of load distribution,
In multi-switching systems connected in various forms such as loop type, call generation and transition.

In response to the disappearance, it becomes necessary to transfer data such as subscriber attributes managed by each exchange between exchanges. In this case, each exchange temporarily uses the data received from other exchanges together with the data it manages to determine and process services. Data types and structures become diverse. For this reason, accessing these complicated data using the conventional methods described above requires analysis necessary for exchange control.

The data access portion of the processing program increases, putting pressure on the program portion that performs service determination and processing, which is the original purpose. As a result, the program itself becomes complex, requiring a great deal of effort and time to design and manufacture the program, which of course leads to a decrease in program quality. Furthermore, in the case of Brigram, which is configured using the conventional method, changes to the data type and configuration due to changes in the connection form of the multi-exchange system and transfer information between exchanges require modification of various parts of the program that accesses the data. This also has the drawback of requiring a great deal of effort and time.

[Means for solving problems]

In order to solve the above-mentioned conventional problems, the present invention provides each exchange with one or more subroutines dedicated to data access, and a host program that calls these subroutines and performs analysis and processing necessary for exchange control. establish. When the higher-level program needs certain data for its logical development, it does not read it from memory itself.
The data is obtained by declaring a commonly defined data name in advance and calling an appropriate data access dedicated subroutine. In addition, the subroutine dedicated to data access determines, based on the input data name, etc., whether the data is managed by itself or data transferred from another exchange, and also determines the type and structure of the data. is read from the memory and sent back to the upper program. If you have multiple subroutines dedicated to data access,
By dividing them into logical types of data, such as subscriber data access subroutines that read subscriber-related data and trunk data access subroutines that read trunk-related data, it is possible to appropriately reduce the scale of the subroutines in terms of processing power. It is suitable for

[Effect]

By providing a subroutine dedicated to data access and abstracting data in the higher-level program that performs analysis and processing, the higher-level program can obtain the necessary data without being aware of the data type or structure. When changing the structure, only the subroutines dedicated to data access need to be changed, and there is no need to change the higher-level program.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a system schematic diagram of an embodiment of the present invention, showing an example of a multi-switching system composed of two exchanges A and B. In the figure, exchanges A and B each have subscriber al =an, manages bl to bn, and performs the switching function independently.Furthermore, by sending and receiving data using the common line C, exchanges A and B perform one complete switching operation as a whole. Realize. In other words, in terms of service, this multi-exchange system operates in the same way as exchange A or exchange B alone.

Exchanges A and B have subroutines dedicated to multiple data accesses.
It has a program named Sal=Sam, Sbl"Sb-, and a higher-level program Pa+Pb that calls this program and performs analysis and processing necessary for exchange control. The higher-level programs Pa and Pb are used when certain data is required due to their logical expansion. , declare a commonly defined data name in advance, and create a subroutine dedicated to appropriate data access Sal-3am+ SSb1-3
Call b to obtain the data from Misaki. Below, a subroutine dedicated to one data access S al
, S bl is a subscriber data access subroutine having the configuration shown in FIG. explain. Note that FIG. 3 is an explanatory diagram of the operation at that time.

As shown in Figure 3 (al), when subscriber a1 to the exchange makes a call and dials the telephone number of subscriber b1 in exchange B as shown in figure fbl, the upper level program to the exchange is Pa is the calling restriction class for subscriber a1, @
The subscriber data access subroutine S declares the data name of data necessary for service determination, such as unspecified type and telephone number.
Call at.

The subscriber data access subroutine Sal determines from the data name and the accommodation location number of subscriber al whether or not it is subscriber data managed by the own exchange. memory PMa
The data regarding subscriber al is read out and outputted to the upper level program Pa.

When the upper level program Pa obtains the data regarding subscriber a1, it adds data necessary for service determination regarding subscriber a1, such as call restriction class and terminal type, from the exchange to exchange B, as shown in FIG. 3, 1bl. Transfer the activation signal.

Upon receiving the activation signal, the exchange aB saves the data regarding the subscriber a1 to the temporary memory TMb as shown in tel in FIG. , calls the subscriber data access subroutine sbt with the abstracted data name.

In response, subscriber data access subroutine Sbl
As shown in Figure 2, it is determined from the data name and the accommodation location number of subscriber bl whether or not it is subscriber data managed by the own exchange.In this case, since it is subscriber data managed by the own exchange, it is Data regarding subscriber b1 is read from the memory PMb and outputted to the host program Pb.

When the host program Pb acquires the data regarding the subscriber b1, it sends it back to the exchange A along with a call completion signal, as shown in FIG. 3, 1bl.

At exchange A, as shown in Figure 3, this subscriber bl
The related data is stored in the temporary memory TMa.

Through the above procedure, each exchange A and B was able to save data regarding subscribers other than those managed by the exchange in the temporary memory of the exchange. Therefore, with regard to subsequent services, it is possible to provide the same service as when calling between subscribers managed by the own exchange.For example, when subscriber b1 requests the telephone number of the caller. In this case, exchange B can respond to this kind of request by outputting the telephone number of subscriber al saved in temporary memory TMb to subscriber bl. When designing a program that determines various services for calls in such a system, it does not matter whether the invocation source or connection destination is a subscriber managed by the own exchange; To determine the difference in data type and configuration, declare the data name, call the subscriber data access subroutine, and in the subroutine, if the activation is from another exchange, the required data is retrieved from the temporarily saved temporary memory. This can be resolved by reading it out.

〔Effect of the invention〕

As explained above, in a multi-connection switching system, the present invention converts data reading into a subroutine and abstracts the data in the higher-level program that performs analysis and processing, thereby eliminating data types that are unnecessary for the logical development of the higher-level program. , the configuration can be locked out. This results in
The logic of the upper-level program becomes clear, and program functions can be layered, allowing efficient configuration, manufacturing, and debugging. Further, even if there is a change in the connection form of exchanges or a change in the transfer information between exchanges, it is only necessary to change the data access subroutine, and there is no need to change the upper level program. Conversely, if there is a change in the service, just change the logic of the upper level program, and the data access subroutine can remain as it is. By applying the present invention in this way, it is resistant to various changes and highly effective in terms of maintainability.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a system according to an embodiment of the present invention, FIG. 2 is a schematic flowchart of a subscriber data access subroutine, and FIG. FIG. 3 is an explanatory diagram of the operation of the embodiment of the present invention, showing the temporary saving of the data. In the diagram, A, B... exchange, C... common line, a
l~an, bl-bn...subscriber, Pa, Pb...
・Top program, Sal~Sarin, Sbl~sb steel・
...A subroutine dedicated to data access.

Claims (1)

[Claims] In a multi-exchange system in which a plurality of independent exchanges are multi-connected, each exchange has a subroutine dedicated to data access created in accordance with the type and structure of the data it handles, and a subroutine that calls the subroutine. and a higher-level program that performs analysis and processing necessary for exchange control, and the higher-level program acquires required data via the subroutine by calling the subroutine with an abstracted data name. A data access method in a structured multi-switching system.