JPH05260129A - System for generating structure body for interface - Google Patents

Abstract

PURPOSE:To generate a structure body for interface independently of the manual work and to prevent a failure in generation of this structure body. CONSTITUTION:A protocol specification input means 1 inputs protocol specifications described in ASN.1, and a service primitive input means 2 inputs a service primitive as transmission data. A conversion means 5 uses the knowledge of a knowledge base 4 to generate the structure body for interface in accordance with protocol specifications inputted by the protocol specification input means 1 and the service primitive inputted by the service primitive input means 2. An interface structure body output means 3 outputs the structure body for interface, which the conversion means 5 generates, to a tool system which assembles and decomposes protocol data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the creation of protocol data in the field of communication, and in particular, when implementing a transmission communication protocol, creates an interface structure necessary as an interface to a tool system for assembling and disassembling protocol data. Structure generation method for interface.

[0002]

2. Description of the Related Art Conventionally, ASN. 1 (Abstract
When implementing and developing the protocol written in the Syntax Notation One) description, the implementer used the tool system to assemble and disassemble the protocol data.

To create protocol data by this tool system, data called an interface structure created from service primitives as transmission data and protocol specifications is used.

In this interface structure, as shown in FIG. 3, one element of the interface structure is ANS. 4 an item identifier for identifying an item appearing in one description, a length of a value of the item, a pointer indicating the location where the item is stored, and a work area
ANS. With item. It is a table structure corresponding to one syntactic type description.

The structure of the array of the interface structure is ANS. 1 Determined according to the type attribute and the identification element attribute that appear in the description.

Conventionally, an interface structure is created by an implementer from ANS.NET based on protocol specifications and service primitives as transmission data. I did it manually considering the grammar.

[0007]

In such a conventional interface structure creating method, the ASN. The array structure of the interface structure changes depending on the type attribute and the identification element attribute in the grammar 1. 1 There was a problem that it was necessary to correctly understand grammar.

Further, in order to create the interface structure, it is necessary to manually create it from the protocol specifications and the service primitives.
Not only is it a time-consuming task, but there is also a problem in that a mistake is made in creating the interface structure.

Furthermore, since each element of the interface structure is a table structure consisting of four items, the implementer must create an item identifier other than the work area, a length and a pointer in order to create this interface structure. There was a problem that it was necessary to store each element.

In view of the above points, an object of the present invention is to provide AS
N. An object of the present invention is to provide an interface structure generation method in which the interface structure described in 1 is not manually created and an interface structure creation error is eliminated.

[0011]

The interface structure generating method of the present invention is based on ASN. Protocol specification input means for inputting the protocol specifications described in 1., service primitive input means for inputting service primitives, ASN. 1 knowledge about grammar, knowledge about data format of service primitive input by the service primitive input means, knowledge about interface structure, and knowledge describing relationship between service primitive and interface structure. Conversion means for creating an interface structure from the knowledge base to be stored, the protocol specification input by the protocol specification input means and the service primitive input by the service primitive input means, using the knowledge of the knowledge base; Interface structure output means for outputting the interface structure created by the conversion means to a tool system.

[0012]

In the interface structure generating method of the present invention, the protocol specification input means is the ASN. 1. The protocol specification described in 1 is input, the service primitive input means inputs the service primitive, and the knowledge base is AS.
N. 1 knowledge about grammar, knowledge about data format of service primitive input by service primitive input means, knowledge about interface structure, and knowledge describing relationship between service primitive and interface structure are stored. Then, the conversion means creates an interface structure using the knowledge of the knowledge base from the protocol specification input by the protocol specification input means and the service primitive input by the service primitive input means. The interface structure created by the converting means is output to the tool system.

[0013]

The present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the structure of an interface structure generating method according to an embodiment of the present invention. The interface structure generation method of this embodiment is
Protocol specification input means 1, service primitive input means 2, interface structure output means 3,
It is composed of a knowledge base 4 and a conversion means 5.

The protocol specification input means 1 uses the ASN. 1
The specifications of the protocol described in (4) are input to the conversion means 5.

The service primitive input means 2 inputs a service primitive, which is transmission data, to the conversion means 5.

The interface structure output means 3 is
The interface structure created by the conversion means 5 is output to a tool system (not shown) that assembles and disassembles protocol data.

The knowledge base 4 is ASN. 1 knowledge about grammar, knowledge about data format of service primitive, knowledge about interface structure, and knowledge describing relationship between service primitive and interface structure are stored.

The conversion means 5 is the protocol specification input means 1
An interface structure is created using the knowledge of the knowledge base 4 from the protocol specification input by the service primitive and the service primitive input by the service primitive input means 2.

Referring to FIG. 2, the conversion means 5 is ASN.
The process of creating the interface structure using the knowledge in the knowledge base 4 from the protocol specification and the service primitive described in 1 is the type attribute processing step S2.
1, an identification element attribute processing step S22, an interface structure array structure substitution step S23, and a protocol specification end determination step S24.

Next, the operation of the interface structure generating method of this embodiment having the above structure will be described.

First, the protocol specification input means 1 is set to ANS. The protocol specification described in 1 is input, and this protocol specification is delivered to the conversion means 5.

The service primitive input means 2 receives a service primitive as transmission data from the implementer, and delivers this service primitive to the conversion means 5.

The conversion means 5 is an ASN.
Knowledge Base 4
Stored in the ASN. This is performed using knowledge about one grammar and knowledge about the data format of the service primitive (step S21). For example, SEQUENCE
Since it is necessary to consider the order of the elements forming the interface structure in the type, the conversion means 5 stores in the knowledge base 4 whether or not the service primitive follows the arrangement of the elements appearing in the protocol specification. A
SN. 1 Check using knowledge about grammar and knowledge about data format of service primitive.

Next, the conversion means 5 uses the protocol specification A
SN. 1 Processing by the attribute of the identification element appearing in the description,
The ASN. This is performed using knowledge about one grammar and knowledge about the data format of the service primitive (step S22). For example, elements with the OPTIONAL attribute can be omitted in the protocol specifications, but OPTIONAL in the protocol specifications.
Knowledge that, if the element having the attribute is omitted and the element having the OPTIONAL attribute is not omitted in the service primitive, the process of substituting the value of the element having the OPTIONAL attribute into the interface structure is required. AS stored in knowledge base 4
N. 1 Extracted from knowledge of grammar and knowledge of data format of service primitives.

Subsequently, the conversion means 5 uses the knowledge about the interface structure stored in the knowledge base 4 and the knowledge describing the relationship between the service primitive and the interface structure, for the interface. Values are assigned to the item identifiers, lengths, and pointers that make up the array structure of the structure (step S23).

Finally, the conversion means 5 checks whether the input service primitive has been processed according to all the elements of the protocol specification (step S2).
4). As a result of the check, when the processing is completed, the conversion means 5 passes the created interface structure to the interface structure output means 3. On the other hand, when the processing has not been completed, the conversion means 5 returns the processing to step S21 again and performs the above processing.

The interface structure output means 3 is
Output the interface structure to the tool system to generate the protocol data.

[0029]

As described above, according to the present invention, the protocol specification input means, the service primitive input means, the knowledge base, the conversion means, and the interface structure output means are provided.
S. Interface structure can be automatically created by using the knowledge in the knowledge base, which was manually done while checking each description and the service primitive one by one. 1 It has the effect of saving the trouble of correctly understanding grammar.

Further, it is possible to automatically create the interface structure with the tool system from the protocol specification and the service primitive, and it is possible to prevent the interface structure creation error from occurring.

Further, there is an effect that it becomes unnecessary to store the item identifier, the length of the value and the pointer to the value other than the work area of the interface structure for each element every time.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an interface structure generation method according to an exemplary embodiment of the present invention.

FIG. 2 is a flow chart showing a process of a converting means in FIG.

FIG. 3 is a diagram showing a configuration of an interface structure.

[Explanation of symbols]

 1 protocol specification input means 2 service primitive input means 3 interface structure output means 4 knowledge base 5 conversion means

Claims (1)

[Claims] 1. ASN. Protocol specification input means for inputting the protocol specifications described in 1., service primitive input means for inputting service primitives, ASN. 1 knowledge about grammar, knowledge about data format of service primitive input by the service primitive input means, knowledge about interface structure, and knowledge describing relationship between service primitive and interface structure. A knowledge base to be stored, a conversion means for creating an interface structure using the knowledge of the knowledge base from the protocol specifications input by the protocol specification input means and the service primitives input by the service primitive input means, An interface structure generation method for outputting an interface structure created by the conversion means to a tool system.