KR20000028318A - Method for treating message using common buffer in atm switching system - Google Patents

Abstract

PURPOSE: A method for treating a message is provided to treat a call in a switching system quickly by designing a common buffer, by approaching to a signaling message by using an index, and by operating an Inter Process Communication(IPC) by using the index. CONSTITUTION: A block for treating a call in an Asynchronous Transfer Mode(ATM) switching system contains a call controller(21), a coordinator(22), a protocol controller(23), and a dispatcher(24). A signaling message is copied in a common buffer(25) for each protocol stack to share the signaling message. In addition, the operation of treating a call is completed by approaching the signaling message stored in the common buffer by using an index for the common buffer. Also, an IPC is operated by using the index between each protocol stack. And, the size of the common buffer is adjusted by the size of a system. Herein, the common buffer prevents the approach from each protocol stack at the same time.

Description

Message Handling Method Using Shared Buffer in ATM Switching System

The present invention relates to a message processing method using a shared buffer in an ATM switching system. Particularly, after a call processing related signaling message is copied to a shared buffer in a call processing block of a corresponding switching system, each of the ATMs is identified using only the identification number of the corresponding shared buffer. By performing IPC (Inter Process Communication) between protocol stacks, the present invention relates to a message processing method using a shared buffer in an ATM switching system that can quickly perform call processing in a corresponding switching system.

In general, in a call processing block of an ATM switching system, a call processing-related signaling message is transmitted through a multi-stage protocol stack while continuously copying the signaling message for each protocol stack to perform IPC. A signaling message transmission method in a call processing block of a corresponding ATM switching system will now be described with reference to FIG. 1.

First, when a dispatcher 14 receives a signaling message for requesting a call through a signaling asynchronous transfer mode adaptation layer (SAAL), the dispatcher 14 distributes the received signaling message and distributes the received signaling message. The signaling message is copied and transmitted to the next protocol stack, Coordinator 12.

At this time, the coordinator 12 manages the SAAL through the dispatcher 14 and copies the signaling message transmitted from the dispatcher 14 to the protocol control unit 13 and transmits the corresponding protocol control unit ( 13) reads the signaling message transmitted from the coordinator 12, performs the relevant protocol processing, reports to the coordinator 12 that the corresponding protocol processing is completed, and simultaneously copies the corresponding signaling message to copy the corresponding coordinator ( 12), the coordinator 12 copies the signaling message transmitted from the protocol control unit 13 and transmits it to the call control unit 11, which is the next protocol stack.

At this time, the call control unit 11 manages the resources in the switching system, reads the signaling message transmitted from the coordinator 12 to establish a connection, and performs the operation in the corresponding call processing block. The signaling message is converted into an internal primitive and then copied and transmitted.

Meanwhile, since the call processing related signaling message transmitted from the upper processor to the corresponding call controller 11 performs the opposite operation described above, the corresponding signaling message is continuously copied from the corresponding call controller 11 to the next protocol stack. Will be sent.

As described above, in the conventional call processing block, IPC is performed by copying a signaling message every time between the protocol stacks, so that an overload occurs when IPC is performed due to frequent message copying, and thus, a corresponding call processing time is delayed. there was.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object thereof is to design a shared buffer to share signaling messages between protocol stacks in performing call processing in a call processing block of an ATM switching system, and sharing the corresponding message. By accessing the signaling message stored in the buffer with the identification number, and performing the IPC using only the identification number between the respective protocol stack, it is possible to quickly perform the call processing in the corresponding switching system.

In order to achieve the above object, a feature of the present invention is a method in which each protocol stack processes a signaling message using a shared buffer in a call processing block of an ATM switching system, wherein the call buffer related signaling message is allocated to a shared buffer. After copying, the IPC between each protocol stack is performed by using the identification number of the corresponding shared buffer, and each protocol stack uses the identification number to access the signaling message stored in the shared buffer to perform the related call processing function. It is to process the corresponding signaling message for execution.

1 is a conceptual diagram of a call processing block in a conventional ATM switching system.

2 is a conceptual diagram of a call processing block using a shared buffer in an ATM switching system according to the present invention;

Explanation of symbols on the main parts of the drawings

21: call control unit 22: coordinator

23: protocol control unit 24: dispatcher

25: shared buffer

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

The call processing block of the ATM switching system according to the present invention includes a call control unit 21, a coordinator 22, a protocol control unit 23, and a dispatcher 24, as shown in FIG. In addition, the protocol stack further comprises a shared buffer 25 so that each protocol stack can share the call processing-related signaling message, the message processing operation using the shared buffer 25 in the call processing block will be described as follows. same.

First, when a dispatcher 24 receives a signaling message requesting call processing through SAAL, the dispatcher 24 distributes the received signaling message and shares a shared buffer 25 for copying each distributed signaling message. ) Is assigned through the shared buffer management module (not shown), the corresponding signaling message is copied, and the coordinator 22 assigns an identification number (index) to the shared buffer 25 allocated from the shared buffer management module. To send).

In this case, the coordinator 22 manages the SAAL through the dispatcher 24, and when the identification number (index) is transmitted through the dispatcher 24, the information and the identification number indicating that a signaling message for call processing has been received. (index) is transmitted to the protocol control unit 23.

Accordingly, the protocol control unit 23 reads the signaling message stored in the corresponding shared buffer 25 by using the identification number (index) transmitted at the same time as the message reception information is transmitted from the coordinator 22 to perform the related protocol processing. After performing, the protocol processing information and identification number (index) is transmitted to the coordinator 22, the coordinator 22 transmits the transmitted protocol processing information and identification number (index) to the call controller 21. .

At this time, the call control unit 21 manages the resources in the switching system, and the protocol processing information is transmitted from the coordinator 22 to the corresponding shared buffer 25 using the identification number (index) transmitted simultaneously. The connection is established using the stored signaling message. In the call processing block of the present invention which performs such an operation, various information and indexes are converted into internal primitives and transmitted.

On the other hand, since the call processing related signaling message transmitted from the upper processor to the corresponding call controller 21 performs the opposite operation described above, the shared buffer 25 in which the signaling message is stored in each protocol stack of the corresponding call processing block. By performing only the next protocol stack and IPC using the identification number (index), the call processing function is performed.

As described above, in the call processing block of the ATM switching system according to the present invention, each protocol stack is shared by copying a signaling message to the shared buffer 25, and the stacks are stored in the shared buffer 25. Call processing is performed by accessing a signaling message stored in the corresponding shared buffer 25 using an identification number. In addition, IPC is performed using only a corresponding index between each protocol stack.

Meanwhile, the size of the shared buffer 25 should be adjusted according to the size of the system, and a ring buffer can be used, and the ring buffer can be accessed by several protocol stacks. When allocating or freeing, you need to define a critical section, that is, a region, and use semaphores to control the simultaneous access of each protocol stack to the ring buffer.

As described above, in the present invention, in performing call processing in a call processing block of an ATM switching system, a shared buffer is designed to share a signaling message between protocol stacks, and the signaling message stored in the shared buffer is accessed by an identification number. And, by performing the IPC using only the identification number between the respective protocol stack, it is possible to quickly perform the call processing in the corresponding switching system.

Claims (2)

A method in which each protocol stack processes a signaling message using a shared buffer in a call processing block of an ATM switching system, After allocating and copying the call processing related signaling message to the shared buffer, IPC is performed between each protocol stack using the identification number of the corresponding shared buffer, and each protocol stack is stored in the shared buffer using the identification number. A method of processing a message using a shared buffer in an ATM switching system, characterized in that for processing a corresponding signaling message for performing a related call processing function by accessing a signaling message. The method of claim 1, The shared buffer is accessible from each protocol stack, defines a predetermined area at the time of allocation or release, and prevents simultaneous access in each protocol stack.