JPH04255153A - Message format conversion system - Google Patents

Abstract

PURPOSE:To attain the connection between common line signal system lines with a different specification by converting a message format into a message format suitable for an opposite station through the reference of a conversion table when the message from the opposite station is received. CONSTITUTION:When a station a having a point code alpha being an identification code of an opposite station receives a No.7 signal system message from a station betahaving a point code beta, a conversion table from a registered point code in advance into a version is indexed by using the code beta as an index to obtain the version. Then the conversion table to an SID is indexed to obtain an SID of an internal signal number, then the reception message is validated. Succeedingly, the version and the reception message type are used to retrieve the conversion table from the registered message type and version to parameter edit control to decide the edit control data converting each parameter in the reception message to a form suitable for the internal processing.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a message format conversion system, and particularly to a message format conversion system for different specification Nos. 7 common line signaling system ISDN user part, etc., and a message format conversion method between an external message such as an ISDN user part, and an internal message processed within an exchange.

0002

[Prior Art] Inter-office No. In the 7 common channel signaling system, the content required by each standardization organization that examines technical standards for connecting between stations is partially different, and even if the same organization makes recommendations, the content is updated over time, and the message Additions and parameter changes are being made. Changes to realize services specific to each station operating company will also be included. In this way, the inter-office No. The ISDN user part of the 7 common channel signaling system can have various specifications, ie, versions (VSN).

[0003] In the conventional system, No. There is only one type of conversion pattern for the interoffice/exchange internal format of the 7 signaling system message, which is created in accordance with the version of the exchange.

[0004] That is, when a message is received from the opposite station, format conversion processing is immediately performed based on the type of the received message without the concept of version identification.

[0005]

[Problems to be Solved by the Invention] In the conventional message format conversion system, each exchange has only one type of conversion pattern. 7 If the local station and the opposite station use different versions of the format of the signaling message, the inter-station No. There was a problem in that it was not possible to send and receive 7-signaling messages, and it was necessary to make the specifications of the opposing stations the same.

[0006]

[Means for Solving the Problems] The message format conversion method of the present invention uses a point code, which is an identification code of the opposite station, as an index to index a table in station data and convert the version of the common line signaling specification of the opposite station. a first step of determining the received message type and the first
a second step of determining whether the received message is valid or invalid by indexing a table in the system data using the version obtained in step; and if the received message is determined to be valid in the second step; A third step of converting the received message received from the opposite station and the parameters in this received message into an interface compatible with the internal processing of the exchange through conversion processing for each version and received message type, and setting it in a transaction. , a fourth step of determining the message type by indexing a table in the system data using an internal signal number indicating a processing number corresponding to each message of the exchange when transmitting the message to the opposite station;
After determining the message type in the fourth step, a fifth step of converting the internal interface format parameters to a version-compatible message format using the same table in the system data used in the third step.
The configuration includes the steps of.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings. FIG. 1(a) shows No. 1 between central office exchanges for explaining one embodiment of the present invention. 1 is a diagram showing the connection concept of the 7 common channel signaling system line, and FIG. 1(b) is a conversion table from point code to version. Figure 2 is used when receiving a message from the opposite station, and the SID is determined from the message type.
(Sub Identifier), and Figure 3 is a conversion table that is used for transmission and reception with the opposite station, and is a conversion table from message type and version to parameter editing control, and Figure 4 is a table for converting messages to and from the opposite station. Used when sending messages, version, S
This is a conversion table from ID to message type.

In FIG. 1(a), a station having a point code α, which is the identification code of the opposite station (hereinafter referred to as α station), receives a number from a station having point code β (hereinafter referred to as β station). A case in which a 7-signaling message is received will be explained. First, using the point code β as an index, a point code to version conversion table registered in advance according to the station conditions shown in FIG. 1(b) is indexed, and the version (V
SN) Find x. The SID of the internal signal number, which is the processing number corresponding to each message processing of the exchange, is obtained by indexing the pre-registered message type to SID conversion table shown in FIG. 2 using the received message type and the obtained version x. For example, the received message is determined to be valid, and if not requested, it is determined to be invalid.

Next, each parameter in the received message is adapted to internal processing by searching by version and received message type using the pre-registered message type and version to parameter editing control conversion table shown in FIG. Determine the editing control data to convert to the format.

[0010] The α station receives No. 1 from the γ station. When receiving a 7 signaling message, the version is y, and by searching the primary tables in Figures 2 and 3 with version y, the secondary table and subsequent tables are different from the case of receiving a message from the β station described above. You will be indexing different tables. This allows No. 1 with different specifications. 7 common line signaling system 1
Can be handled by one exchange.

On the other hand, when transmitting a message to the opposite station, the version and the SID, which is an internal signal, are used as indexes to transmit the version and the pre-registered version shown in FIG.
Index the SID to message type conversion table and select No. 7 Determine the signaling message type. Next, the internal interface format parameters are converted into a message format compatible with the version of the partner station using the table shown in FIG. Then, message sending processing is performed.

In this embodiment, No. Although an application example is shown for the 7 common line signaling system, the same method can be applied to other common line signaling systems by registering the above-mentioned data in advance in the respective conversion tables in accordance with the station conditions. be able to.

[0013]

Effects of the Invention As explained above, the present invention assigns a version to each point code that identifies a station and registers it in a conversion table in advance, and when a message from the opposite station is received, The specifications of the system are identified using a conversion table, a format conversion table is provided for each version searched, and the message format is converted to suit the opposing station, making it possible to connect common line signaling lines with different specifications. have an effect.

[Brief explanation of the drawing]

FIG. 1(a) shows a number between central exchanges for explaining an embodiment of the present invention. 7 is a diagram showing a connection concept of a common line signaling system line; FIG. (b) is a conversion table from point code to version.

FIG. 2 is a message type to SID conversion table used when receiving a message from the opposite station.

FIG. 3 is a conversion table from message type and version to parameter editing control that is used for transmission/reception with the opposite station.

FIG. 4 is a conversion table from version and SID to message type used when transmitting a message to the opposite station.

Claims (1)

[Claims] 1. A first step of searching a table in station data using a point code, which is an identification code of the opposite station, as an index to obtain the version of the common channel signaling specification of the opposite station; a second step of determining whether the received message is valid or invalid by indexing a table in system data with the received message type and the version determined in the first step; If it is determined to be valid in the step, the received message received from the opposite station and the parameters in this received message are converted into an interface that is compatible with the internal processing of the exchange through conversion processing for each version and received message type. The third step is to perform processing to set the transaction, and when transmitting the message to the opposite station, the internal signal number indicating the processing number corresponding to each message of the exchange is used as an index to index the table in the system data and send the message. a fourth step of determining the type; and after determining the message type in said fourth step, converting the internal interface format parameters into a version-enabled message format using the same table in the system data used in said third step; and a fifth step of converting a message format.