KR100227809B1 - The message processing method using level-2 firmware in mobile exchange - Google Patents

Abstract

[Technical field to which the invention described in the claims belong]

Digital Mobile Switching System.

[Technical Challenges to Invent]

Since the firmware for CCITT and ANSI Level 2 are in the form of ROM separately in the conventional mobile communication switch, it is necessary to know what the system configuration is in advance when the system is mounted, and the proper firmware can be applied. It is to solve the inconvenience that needs to be replaced by the additional ANSI or CCITT ROM.

[Summary of the solution of the invention]

A primitive setting step (ST1-ST13) of generating and setting primitives so as to check whether a message type is CCITT or ANSI when transmitting and receiving a signal message at level 2 while initializing software and hardware; A primitive transmission process (ST14) for transmitting the set primitive to a level 3 data transmission unit; It is characterized in that it comprises a signal message processing step (ST15) of determining whether the signal message format is changed according to the primitive transmitted from the level 3 data transmitter, and processing and transmitting the signal message according to the determination result.

[Important Uses of the Invention]

It is applied to process common line signaling level 2 CCITT and ANSI standard signal message by firmware in digital mobile communication exchange.

Description

Message Handling Method Using Level 2 Firmware in Mobile Switching System

The present invention relates to a firmware implementation related to the Level 2 standard of a message transfer part (MTP) of common line signaling devices in a digital mobile communication exchange.

In general, mobile communication exchanges implement NO.7 signal link level 2 firmware in CCITT and ANSI, respectively.The part of the signal message format between CCITT and ANSI level 2 is somewhat different. Each has its own separate implementation of format conversion between ANSI and CCITT.

That is, conventionally, the CCITT Level 2 standard implements the firmware according to the standard, and if the ANSI implements the firmware according to the ANSI level 2, ROM has been produced and used separately, and the signal of the level 2 protocol of ANSI and CCITT is used. Part of the slightly different message format has been format conversion in the communication between ANSI and CCITT at level 3.

Therefore, the conventional mobile communication switch as described above requires the firmware for CCITT and ANSI Level 2 to be in the form of a ROM separately, so that the proper firmware can be applied only when the system configuration is implemented in advance. There was an inconvenience in that the firmware ROM should be correctly mounted at the position of the signal terminal in charge of the function.

In addition, when the signal link is expanded during operation of the system, there is an inconvenience in that it must be replaced with an extended ANSI or CCITT ROM. In addition, when the signal link is changed, it is inconvenient to change it after deactivating the active signal link.

Accordingly, the present invention has been proposed to solve various problems that occur when transmitting and receiving messages between level 2 and level 3 of the conventional mobile communication switch, and an object of the present invention is a signal between level 2 of "CCITT" and "ANSI". The level 2 firmware is used in a mobile communication exchange that improves productivity and reliability by modifying only primitives in communication between level 2 and level 3 without implementing two different message formats. To provide a message handling method.

The method for achieving the object of the present invention includes a primitive setting process for generating and setting a primitive so as to determine whether the message type is CCITT or ANSI when transmitting and receiving a signal message at level 2 with software and hardware initialized; A primitive transmission process for transmitting the set primitive to a level 3 data transmission unit; A signal message processing process is performed to determine whether the signal message format is changed according to the primitive transmitted from the level 3 data transmitter, and process and transmit the signal message according to the determination result.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

1 is a schematic block diagram of a message transmission unit in a mobile communication switch to which the present invention is applied.

2 is a flowchart illustrating a message processing method using level 2 firmware in a mobile communication switch according to the present invention.

* Explanation of symbols for main parts of the drawings

10: level 3 data transmission unit 20: level 2 data transmission unit

1 is a schematic block diagram of a message transmitter in a mobile communication switch to which the present invention is applied. When a primitive flag setting is requested from the level 3 data transmitter 10, a new primitive is generated by checking a type of a message to be transmitted. Whether the level 2 data transmitter 20 transmits the generated primitives to the level 3 data transmitter 10 before the signal link is activated, and the data format to be transmitted and received by the level 2 data transmitter 20 is CCITT. It consists of a level 3 data transmitter 10 that requests primitive flag settings to determine whether it is ANSI and changes the format of transmission and reception messages when the primitives generated from the level 2 data transmitter 20 are transmitted.

2 is a flowchart illustrating a message processing method using a level 2 firmware in a mobile communication switch according to the present invention, which includes initializing software and hardware when power is supplied or reset (ST1) (ST2), and CCITT / ANSI setting. If required (ST3) checking whether the data format to be transmitted / received is an ANSI standard (ST4); if the data format to be transmitted / received is an ANSI standard, a message signal unit (hereinafter abbreviated as "MSU") or retrieved Checking whether it is MSU transmission / reception (ST5); if it is not MSU or retrieved MSU transmission / reception, performing normal operation (ST6); and if it is MSU or retrieved MSU transmission / reception, checking whether it is MSU transmission / reception (ST7) ), And setting the MSU primitive to "156" if the MSU transmission and reception (ST8), and setting the retrieved MSU primitive to "15F" if the retrieved MSU transmission and reception In step ST9, if it is not ANSI standard in step ST4, it is determined that it is CCITT standard, and checks whether it is MSU or retrieved MSU transmission or reception (ST10) and performs normal operation if it is not MSU or retrieved MSU transmission or reception. If the MSU or retrieved MSU transmission and reception (ST11), and if the MSU transmission and reception again, setting the MSU primitive to "56" (ST8), and if the retrieved MSU and the retrieved MSU primitive Setting to "5F" (ST13), transmitting the set primitives to level 3 (ST14), and checking the primitives transmitted at the level 3 and processing a transmission / reception message according to CCITT or ANSI standards. (ST15).

The message processing method using the level 2 firmware according to the present invention as described above will be described in detail.

First, when power is supplied to the system or the system is reset, the level 2 data transmitter 20 initializes the software and hardware (ST1) (ST2), and between the level 2 and level 3 in the integrated level 2 firmware. When a flag requesting to indicate whether the CCITT standard or the ANSI standard is transmitted from the level 3 data transmission unit 10 for transmitting and receiving the signal message (ST3), it is checked whether the data format to be transmitted and received is ANSI standard (ST4).

In this case, to use ANSI protocol for signal terminal firmware or CCITT protocol, set to "0" if CCITT standard protocol is used and "1" if ANSI protocol protocol is used.

On the other hand, the level 2 data transmission unit 20 searches for the data format to be transmitted and received and checks whether it is a message signal unit (MSU) or a retrieved MSU if it is ANSI standard (ST5), and if it is not the MSU or retrieved MSU transmission and reception, it is normal. (ST6), otherwise, if the MSU or retrieved MSU transmission and reception again check whether the MSU transmission (ST7), if the MSU transmission and reception MSU primitive set to "96" (ST8), retrieved MSU transmission and retrieve The MSU primitive is set to "9F" (ST9).

In step ST4, if it is not an ANSI standard, it is determined as a CCITT standard and checks whether the MSU or the retrieved MSU is transmitted or received (ST10), and if the MSU or the retrieved MSU is not transmitted or received, performs a normal operation (ST6), MSU or If the retrieval MSU transmission and reception is again checked whether the MSU transmission and reception (ST11), if the MSU transmission and reception, the MSU primitive is set to "56" (ST8), otherwise, if the retrieval MSU transmission and reception, the retrieved MSU primitive set to "5F" (ST13) ).

If a primitive is generated and set in this way, the primitive set in the level 3 data transmitter 10 is transmitted before the signal link is activated (ST14). Accordingly, the level 3 data transmitter 10 transmits the primitive. By checking the used primitives, the CCITT or ANSI standard protocols are distinguished, and when the format of the signal message needs to be changed, the one or more level 2 firmware processes the transmit and receive messages of the ANSI and CCITT standard (ST15).

As described above, the present invention implements one firmware by modifying only primitives when communicating between level 2 and level 3, without implementing portions of the signal message format between CCITT and ANSI level 2 somewhat different from each level 2 firmware. As a result, productivity and reliability can be improved.

In addition, it handles CCITT and ANSI standard signal messages with a single piece of firmware, so it is possible to prevent the error caused by mounting ANSI ROM when CCITT standard is used or CCITT ROM when ANSI standard is used. There is also an effect.

And since it is possible to process signal messages of CCITT standard and ANSI standard with one firmware ROM, configuration of hardware is easier than with each firmware ROM.

The present invention provides a signal message format between Level 2 of the International Telegraph and Telephone Consultative Committee (hereinafter abbreviated as "CCITT") and the American National Standard Institute (hereinafter abbreviated as "ANSI"). The message processing method using level 2 firmware in a mobile communication switch that improves productivity and reliability by modifying only primitives in communication between level 2 and level 3 without implementing the other parts in two firmwares. It is intended to provide.

Claims (4)

Digital line communication system that transmits and receives the common line signaling level 2 CCITT standard and ANSI standard signal message, and whether the message type is CCITT or ANSI when sending and receiving the signal message in the level 2 data transmitter with software and hardware initialized. A primitive setting process (ST1-ST13) for generating and setting a primitive so as to check the; A primitive transmission process (ST14) for transmitting the set primitive to a level 3 data transmission unit; And a signal message processing process (ST15) for determining whether to change the signal message format according to the primitive transmitted from the level 3 data transmitter and processing and transmitting the signal message according to the determination result. Message handling method using level 2 firmware at exchange. The method of claim 1, wherein the primitive setting process (ST1-ST13) sets the message signal unit (MSU) primitive to 56 when the signal message is CCITT standard, and sets the retrieved MSU primitive to 5F, and MSU when the signal message is ANSI standard. A method for processing messages using level 2 firmware in a mobile switching center, wherein the primitive is set to 156 and the retrieved MSU primitive is set to 15F. The method according to claim 1, wherein the primitive transmission transmits the primitive set in the level 3 data transmission unit before the signal link is activated. The method according to claim 1, wherein the signal message processing is a part of the signal message format between CCITT and ANSI level 2 slightly different in the unified firmware according to the primitive message processing method using a level 2 firmware in a mobile communication exchange. .

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