KR100291014B1 - Method for processing signaling protocol in atm switch - Google Patents

Abstract

A message information processing method, and a signaling protocol processing method. The present message information processing method includes a step of waiting until a specific protocol processing unit is to be executed, a step of determining a port requiring priority processing when a specific protocol processing unit is to be executed, Checking whether there is message information queued in a queue having a higher priority among the queues allocated for that port, processing message information queued in a queue having higher priority, if there is queued message information, A step of checking the type of a message to be transmitted and selecting a destination message queue when there is a need to transmit a message to another layer after processing the message information queued in the queue, If it has been processed as many times as possible, Processing the message information queued in the low priority queue if the message information is queued in the low priority queue, processing the message information queued in the low priority queue, Checking the type of the message to be transmitted and selecting the destination message queue when there is no message information waiting in the low priority queue or if the number of messages that can be processed at one time has been processed, And repeating the above steps in the current protocol processing unit until the next step. In the asynchronous transfer mode exchanger having the call processing section, the call / connection control protocol processing section, the signaling asynchronous transfer mode adaptation layer protocol processing section, and the asynchronous transfer mode adaptation layer type 5 processing section, the signaling protocol processing method has priority for each subscriber port And each protocol processor divides a queue into a high priority queue and a low priority queue for each port, each protocol processor performs a message information processing algorithm on the message information stored in the queue, And selecting and storing the destination information of the upper or lower layer according to the type and purpose of the message. The signaling protocol processing apparatus includes an asynchronous transmission mode intra-exchange signaling protocol processing unit including a call processing unit, a call / connection control protocol processing unit, a signaling asynchronous transfer mode adaptation layer protocol processing unit, and an asynchronous transfer mode adaptation layer type 5 processing unit, The input device of the protocol processing unit of the layer includes a buffer for storing messages requiring priority processing among the messages transmitted from the upper or lower layer protocol processing unit and a buffer for storing other messages.

Description

METHOD FOR PROCESSING SIGNALING PROTOCOL IN ATM SWITCH BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a method and apparatus for processing a signaling protocol of an asynchronous transfer mode (ATM), and particularly relates to a configuration of a protocol stack that can reduce a timeout when a signaling protocol message is transmitted, To a message delivery method and apparatus.

Generally, asynchronous transfer mode exchanges use a method of handling a signaling protocol with one queue for each processing unit of each layer of the signaling protocol. In this method, each protocol layer is constituted of one state machine. When the message information from the upper layer protocol processing unit and the message information from the lower layer protocol are the same message information, the state machine is transited to the same state .

FIG. 1 shows a conventional call processing method, which will be described in more detail with reference to the drawings.

The signaling asynchronous transfer mode adaptation layer protocol processing unit 40 processes the message information queued in Q40, and the state of the signaling asynchronous transfer mode application layer protocol processing unit 40 transitions according to the message. In Q40, the message information from the call / connection control protocol processing unit 30 and the message information from the asynchronous transfer mode applying layer type 5 processing unit 50 are stored together and are awaited for processing. And processed by the signaling asynchronous transfer mode application layer protocol processing unit 40 according to the order stored in the queue Q40.

However, since the call setup request message generated during the signaling protocol has a short time-out period compared to other messages, urgent processing is required. Even if a response message should be transmitted within a short time, A timeout occurs due to the determination of the processing order, and message information for timeout processing is generated again in the upper layer 30 due to the timeout, and the message information must be transmitted to the lower layer 40. As a result, the lower layer protocol processing unit 40 processes the useless message information that has timed out and the message information for timeout processing, which causes a problem of reducing the call processing performance of the asynchronous transfer mode exchange.

In addition, since messages transmitted from the subscriber ports of the asynchronous transfer mode exchanger share one queue in the processing part of each layer of the signaling protocol, if the number of messages transmitted from one port increases, processing of messages transmitted from other ports There is a high possibility that a delay occurs and a time-out occurs.

In order to solve the problem that the processing of a message requiring priority processing is delayed due to the use of one message queue by each layer of the signaling protocol and the overload state of one port affects the performance of another port, Although studies have been made to manage an efficient message queue in the processing unit, the above problem has not been solved yet.

Accordingly, it is an object of the present invention to provide a signaling protocol processing method for solving the problems of the prior art.

Other objects and advantages of the present invention will become apparent from the following detailed description of the invention when read with reference to the accompanying drawings.

1 is a block diagram of an apparatus according to a conventional call processing method applied to the present invention.

2 is a block diagram of a signaling protocol processing apparatus according to the present invention.

3 shows a message processing algorithm according to the present invention.

DESCRIPTION OF THE RELATED ART [0002]

10, 110: System control and management unit

20, 120:

30, 130: call / connection control protocol processor

40, 140: signaling asynchronous transmission mode adaptation layer protocol processor

50, 150: Asynchronous transfer mode adaptation layer type 5 processor

60, 160: Asynchronous transfer mode cell transmission / reception processing unit

70, 170: switching network

80, 180: signaling protocol processing unit of the subscriber station

P1, Q120-Pn, Q120-P1, Q130-Pn, Q140-P1, Q140-Pn, Q150-P1, Q150-Pn, Q160:

According to another aspect of the present invention, there is provided a method of processing message information, the method comprising the steps of: waiting until a specific protocol processing unit is to be executed; Determining whether there is message information queued in a queue having a higher priority among the queues allocated for the port after the port for which the priority processing is required is determined; Processing the message information queued in the queue having a higher priority, processing the message information waiting in the higher priority queue, and checking the type of the message to be transmitted when it is necessary to transmit the message to another layer, Selecting, if there is no message information queued in the higher priority queue If there is message information queued in a queue having a lower priority, if there is message information queued in a queue having a lower priority, processing the message information queued in a lower priority queue Checking a type of a message to be transmitted and selecting a destination message queue when processing the message information queued in the lower priority queue and then transmitting the message to another layer; If there is no message information waiting in the queue or the number of processes is processed at one time, it is repeatedly performed in the current protocol processing unit until another protocol processing unit is to be executed.

According to another aspect of the present invention, there is provided a signaling protocol processing method including a call processing unit, a call / connection control protocol processing unit, a signaling asynchronous transfer mode adaptation layer protocol processing unit, and an asynchronous transfer mode adaptation layer type 5 processing unit Setting a priority for each subscriber port in one asynchronous transfer mode switch; dividing each of the protocol processors into a high priority queue and a low priority queue for each port; And a step of selecting and storing a destination queue of an upper layer or a lower layer according to a type and a purpose of the message, the message information being generated as a result of the execution of the algorithm.

Another preferred embodiment of the signaling protocol processing method according to the present invention comprises the steps of setting a priority of a message queue for distinguishing a general message and a message requiring priority processing in each subscriber port, The method comprising the steps of: processing message information stored in a queue for each port in a protocol processor according to a specific message information processing algorithm; and transmitting the message information generated as a result of the processing to a destination queue And storing the selected data.

Another preferred embodiment of the signaling protocol processing method according to the present invention comprises the steps of assigning a priority to a subscriber port of an asynchronous transfer mode switch, determining a selection order of a message queue to be processed using the granted priority , Consecutively processing a message waiting in a message queue of the current port, and processing a message waiting on a port other than the current port.

According to another aspect of the present invention, there is provided a signaling protocol processing apparatus including a call processing unit, a call / connection control protocol processing unit, a signaling asynchronous transfer mode adaptation layer protocol processing unit, and an asynchronous transfer mode adaptation layer type 5 processing unit In an asynchronous transfer mode interchanging signaling protocol processing apparatus, an input device of a protocol processing unit of each layer stores a buffer for storing messages requiring priority processing among messages delivered from an upper or lower layer protocol processing unit and other messages Buffer.

Hereinafter, the operation principle of the present invention will be described in detail with reference to the accompanying drawings. 2, the asynchronous transmission mode including the call processing unit 120, the call / connection control protocol processing unit 130, the signaling asynchronous transfer mode adaptation layer protocol processing unit 140 and the asynchronous transfer mode adaptive layer type 5 processing unit 150, In the exchanger, each protocol processing unit processes a message according to the inter-layer message information processing algorithm shown in FIG.

The message information processing algorithm will be described with reference to FIG.

When it is time to wait until the protocol processing unit is to be executed, the port to be processed first is determined (s1). When a port to be processed is determined, it is checked whether there is message information queued in a queue having a higher priority among the queues allocated for the port (s2). As a result of checking, if there is message information that is waiting, it processes message information queued in a queue having a higher priority. If it is necessary to transmit a message to another layer, the type of message to be transmitted is checked and a destination message queue is selected and transmitted (s3). If there is no message information queued in a queue having a high priority, or if the number of messages can be processed at one time, it is checked whether there is waiting information in a queue having a low priority (s5). If it is determined that there is a waiting message information, the message information queued in the lower priority queue is processed (s6). If it is necessary to transmit the message to another layer, the type of the message to be transmitted is checked and the destination message queue is selected s7).

If there is no message information of a standby master in a queue having a low priority, or if the number of processes can be processed at one time, the current protocol processing unit repeats the above operation until another protocol processing unit is to be executed.

Hereinafter, the present invention will be described by way of example. And waits until the protocol processing unit 130 becomes the turn to perform. When it is time to execute, it determines the port to process first according to the priority of the port that has already been determined at system initialization. Assuming that the number of ports is 4 and the priority of the port is set as Port 1> Port 4> Port 3> Port 2, first of all the queues of the port 1 are queued in the higher priority queue (Q130-P1, HIGH) It checks whether there is message information, and if there is message information waiting, it processes it. For example, if the waiting message is a call setup message to be transmitted to the call processing unit 120, the call processing unit 120 processes the message information, and then, in the queue for the port 1 of the call processing unit 120, , HIGH). If there is no message information queued in the high-priority queues (Q130-P1, HIGH), or if all of them have been processed, it is checked whether queued message information exists in queues with low priority (Q130-P1, LOW) If any. When it is necessary to transmit a message to another layer after processing the message information, the type of the message to be transmitted is checked and the destination message queue is selected and transmitted. When the type of message is a call setup message or the first response message to a call setup message, the message is delivered to a queue having a higher priority, and the other messages are delivered to a queue having a lower priority. If there is no pending message information in the low-priority queues (Q130-P1, LOW) or all of them have been processed, the current protocol processing unit issues a queue Lt; / RTI >

(Q130-P4, HIGH)? (Q130-P4, LOW)? (Q130-P3, HIGH)

(Q130-P2, HIGH) Q130-P2, LOW Q130-P1, HIGH Q130-P1, LOW

..........

It uses the port priority to determine the order of the message queues to be processed during the protocol message processing, and prioritizes the queued messages in the message queue of the current port before processing the queued messages on other ports in proportion to the priority of each port. The number of messages that can be processed consecutively can be determined. Also, the number of messages that can be processed at one time in a buffer having a high priority and a buffer having a low priority in the port is determined according to the number of messages that can be processed at one port at a time.

For example, Table 1 shows the message handling method when the priority set on each port is as follows.

Port number Priority Number of messages that can be processed at one time Port 1 4 4 * N Port 2 One 1 * N Port 3 2 2 * N Port 4 3 3 * N

Note 1) Priority is represented by an integer. The higher the priority, the larger the value.

Note 2) N is an integer value determined by the processing capability of the system.

Messages that are queued to the highest priority port 1 are processed first, and if there are queued messages, up to (4 * N) messages are processed before the next highest priority port 4 is queued You can process up to (3 * N) messages. If the number of messages that can be processed at one time in a buffer with high priority among (4 * N) messages that can be processed at port 1 is determined as (α * N), the number of messages that can be processed at one time in a buffer with low priority is [ - [alpha]) * N]. The value of α is a value determined according to the processing capability of the system. This process is repeatedly performed according to the priority of each port in the current processing unit until the execution of another processing unit is started.

In this way, the message processing capability of each port can be controlled. Even if one port is overloaded, messages of other ports can be periodically processed. Therefore, the overload state of one port degrades the performance of the other port .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood, however, that the invention is not to be limited to the specific forms thereof, which come within the scope of the appended claims, and all such modifications and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims. .

As described above, a message requiring priority processing means a call setup request message and a first response message, and is delivered to a buffer having a high priority at the time of message transfer. A higher number of messages can be processed at one time by preferentially processing messages stored in a buffer having a higher priority than a message stored in a buffer having a lower priority, and a message requiring priority processing is processed It is possible to reduce the time-out due to a delay in the queue.

According to the present invention, it is possible to prevent the overload state of one port from degrading the performance of another port by setting the priority assigned to each port to be the same, and it is also possible to set the priority for each port differently Accordingly, the message processing capability of each port can be varied, thereby providing various quality of services.

In the present invention, two message queues having different priorities are generated for each port in each layer of the signaling protocol. In each layer, a message requiring priority processing at the time of message delivery is transmitted to a message queue having a high priority, Thereby reducing the call setup failure rate due to the delay.

In addition, priority is set to each port in each layer of the signaling protocol to process a message of a higher priority port prior to a message of a lower priority port and to process a larger number of messages at a time, The performance degradation of the other ports due to the overload state of the ports is prevented and the call processing performance of the asynchronous transfer mode exchanger is generally improved.

Claims (4)

A signaling protocol processing method of an asynchronous transfer mode switch having a call processing unit, a call connection control protocol processing unit, a signaling asynchronous transfer mode adaptation layer protocol processing unit, and an asynchronous transfer mode adaptation layer type 5 processing unit, Setting a priority to each subscriber port; Each protocol processing section divides each port into a high priority queue and a low priority queue, Each protocol processing unit processing the message information stored in the queue, Selecting and storing a destination queue of an upper layer or a lower layer according to the type and purpose of the message, Wherein processing the message information comprises: Waiting until a particular protocol processing unit is to be performed, When the specific protocol processing unit is to be executed, determining a port requiring priority processing; Checking whether there is message information queued in a queue having a higher priority among the queues allocated for the port after the port requiring the priority processing is determined; Processing the queued message information in the high priority queue if the queued message information is present; Checking a type of a message to be transmitted and selecting a destination message queue when it is necessary to transmit a message to another layer after processing message information waiting in the queue having a higher priority; Checking whether there is message information queued in a low-priority queue when there is no message information queued in a high-priority queue, or if the number of messages is processed at one time; Processing message information queued in a lower priority queue if the message information is queued in the lower priority queue; Checking a type of a message to be transmitted and selecting a destination message queue when it is necessary to transmit a message to another layer after processing message information queued in the queue having a low priority, And repeating the steps in the current protocol processing unit until another protocol processing unit is ready to be executed if there is no message information queued in the low priority queue or the number of processes that can be processed at one time, Processing method. A signaling protocol processing method of an asynchronous transfer mode switch having a call processing unit, a call connection control protocol processing unit, a signaling asynchronous transfer mode adaptation layer protocol processing unit, and an asynchronous transfer mode adaptation layer type 5 processing unit, Setting a priority of a message queue for distinguishing and processing a message requiring priority processing in each subscriber port and a general message; Processing message information stored in a queue for each port in each protocol processing unit according to the set priority, Selecting and storing a destination queue of an upper layer or a lower layer according to a type and a purpose of the message, the message being generated as a result of the processing, Wherein processing the message information comprises: Waiting until a particular protocol processing unit is to be performed, When the specific protocol processing unit is to be executed, determining a port requiring priority processing; Checking whether there is message information queued in a queue having a higher priority among the queues allocated for the port after the port requiring the priority processing is determined; Processing the queued message information in the high priority queue if the queued message information is present; Checking a type of a message to be transmitted and selecting a destination message queue when it is necessary to transmit a message to another layer after processing message information waiting in the queue having a higher priority; Checking whether there is message information queued in a low-priority queue when there is no message information queued in a high-priority queue, or if the number of messages is processed at one time; Processing message information queued in a lower priority queue if the message information is queued in the lower priority queue; Checking a type of a message to be transmitted and selecting a destination message queue when it is necessary to transmit a message to another layer after processing message information queued in the queue having a low priority, And repeating the steps in the current protocol processing unit until another protocol processing unit is ready to be executed if there is no message information queued in the low priority queue or the number of processes that can be processed at one time, Processing method. The method as claimed in claim 2, wherein the step of checking the type of the message to be transmitted and selecting the destination queue further comprises the step of, when the message to be transmitted is a call setup message or a first response message of a call setup message, How to handle the signaling protocol that you select as the message queue. 3. The method of claim 2, wherein the message queuing process in the message queue processes a larger number of messages in a buffer having a higher priority than a buffer having a lower priority.