KR950012326B1 - Interfacing method of network access part in the intelligent network element system - Google Patents

Abstract

The method comprises the steps of reading a DPRAM message of a communication board when messages are received by operating an input/output schedule with an operating processor; checking whether the input/output schedule message is on 'Q' of a server, recording the message in DPRAM to be suitable to a slot if there is the message, and checking the flag state of the DPRAM if there is no message; staying the server during a predetermined time to return back to the first step if the flag state of the DPRAM is at "0", and checking whether there is message to be processed if the flag is not "0"; and transmitting the corresponding message after processing the message of the DPRAM for 10 times if there is message to be processed, and performing a 'Q' state flag process after changing the state flag of the DPRAM into "0" if there is no message to be processed.

Description

Matching Method with Network Connection of Intelligent Network Element System

1 is a hardware diagram of an intelligent network service control system to which the present invention is applied.

2 is a message flow diagram between the communication board, the device driver and the server.

3 is a diagram illustrating a distribution position and a structure of a buffer for transmitting and receiving a message with a CMP.

4 is a process flow diagram in accordance with the present invention.

The present invention relates to a method of joining a network connection of an intelligent only element system.

The systems that make up the intelligent network are developed based on CCITT's recommended common line signaling method No.7 protocol. In general, the structure of these systems is based on the hardware of the network connection layer and the general protocol computer. The protocol processing unit is implemented in hardware and connected by using a general purpose computer for system operation management.

In this case, unlike the general message transmission and reception method, the matching unit processing method between the hardware structure unit and the computer should have a real-time processing function suitable for the transmission and reception characteristics of the intelligent network call processing message, and it should not dedicate a lot of system resources to the message processing.

Accordingly, an object of the present invention is to provide a matching method with a network connection part of an intelligent network element system that has a real-time processing function and does not devote much system resources to message processing.

In order to achieve the above object, the present invention is equipped with CMP (CCITT no.7MTP Processor) and network service protocol processing software equipped with hardware and network management software such as common line signal link for CCITT No.7 protocol processing. Common Channel Singa-lling Processor (CCP), Service Logic Processor (SLP) with higher protocol processing and service logic software, OAP (software and user interface devices to provide system operation management and maintenance) Applied to an intelligent network service control system having an operation area and a local area network (LAN) providing interconnection therebetween, the method performs a message input / output operation in a matching function with a network connection unit. Received by the server running the I / O scheduler The first step of instructing to read the message of DPRAM in the communication board whenever there is a message, and after performing the first step, the server's input / output scheduler checks whether the message that has been sent is in the server's queue, After outputting, after dividing the message according to the sloppy structure into the DPRAM and writing the message to the DPRAM, and checking the status flag of the DPRAM if the message is not in the service queue, after performing the second step. If the DPRAM status flag is '0', the server will remain idle for a certain time for real time processing and return to the first step. If the DPRAM status flag is not '0', it will be processed during the message read from the DPRAM. The third step of checking whether there is a message to be processed after the third step is performed, and if the message to be processed exists, the message is transmitted. The method returns to step 1, and if there is no message to be processed, a fourth step of changing the DPRAM status flag to '0' and performing processing according to the queue status flag is performed.

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

1 is a hardware configuration diagram of an intelligent network service control system (NICS).

CMP (CCITT No.7 MTP Processor) with hardware and network management software such as common line signal link for NICS CCITT No.7 protocol processing, Common Channel Signaling Processor (CCP) with network service protocol processing software, Service Logic Processor (SLP) with higher protocol processing and service logic software, OAP (Operation and Administration Processor) with software and user interface devices to provide system operation management and maintenance functions. It consists of a local area network (LAN) that provides interconnection capabilities.

Among them, CCP, SLP, and LAN are redundant to improve usability and performance. HIFU (Highway Inter Face Unit) is built in CCP and is the same board that is responsible for communication between hardware self-constituting CMP.It is equipped with software that performs protocol for self-communication. Other modules consider CCP as a module in the CMP.

2 shows a message flow between a communication board embedded in a CCP for communication with a CMP, a network connection unit, a device driver for a communication board that is software located in a CCP, and a server that manages message input / output.

A large number of call processing messages are input to DPRAM through CMP, and the server periodically reads the messages through the device driver so that the message occupancy of DPRAM does not exceed the limit. At this time, Kernel Space and User Space (User) Frequent entry and exit of a space reduces performance, so when one entry and exit, multiple messages are moved to the kernel buffer and brought to a server located in the user space at a time. The device driver includes information of message formalization according to the structure of DPRAM in the I / O routine so that all functions are processed only by the I / O command of the server without the involvement of the server.

In addition to the transmission and reception by the DPRAM polling method, there is a path capable of immediately processing an emergency message by using the interrupt driver transmission / reception routine of the device driver for the communication board. The server delivers messages using IPC (Inter-Process Communication) with various clients that want to send and receive messages with CMP under its own real-time scheduler.

3 illustrates the location and buffer structure of buffers for transmitting and receiving messages to and from the CMP.

The buffer used for sending and receiving messages is a DPRAM buffer located in the communication board and an intermediate receive buffer allocated in kernel space. DPRAM is composed of buffer for general call processing message, buffer for urgent message transmission and interrupt register, and slot of general message buffer is divided according to occupied message size because structure of buffer is divided into 32 byte slot for efficient use. The number of is determined. The buffers are divided into transmission and reception, and an algorithm for operating a slot structure is used for message transmission and reception.

The kernel's receive buffer consists of 10 buffers of 30 bytes, the maximum size of the message, so that up to 10 receive messages can be transferred at one time.

When a receive command from the server enters the device driver, up to 10 messages recorded in DPRAM are moved to the kernel buffer, the DPRAM is emptied, and the number of received messages and buffers are transferred to the server. Do not spend time for work.

The message output by the server is given an output command in one message unit, and the device driver divides the message into slots and writes it to DPRAM without an intermediate buffer. In addition, an emergency message writes a message in the emergency message buffer, and then writes a predetermined value in the interrupt register to generate an interrupt (CCP or communication board) on the status side and the interrupt routine is processed.

4 is a flowchart showing in detail the actual message processing flow of the CMP matching unit device centered on the input and output scheduler of the server.

Since the server's I / O scheduler determines the next processing flow based on the server's queue status and the flag indicating the presence of messages received from DPRAM, the initial flags are set to "1" indicating that there is a message to process (1). ).

The server instructs the device driver's input routine to read the DPRAM message each time it enters run mode by the scheduler.

At this time, the device drive processes up to 10 messages recorded in the receiving DPRAM in the DPRAM slot unit, transfers them to the kernel buffer, frees the DPRAM, and then delivers the message to the server. Check if the message is in the server queue (4).

If the message exists in the queue, the transmission message is passed to the output routine of the device driver (5), and the device driver divides the message into a slot structure and writes it to the DPRAM (6). If there are no messages in the server's queue, the scheduler changes the queue status flag to "0" (7), examines the status flag of the DPRAM (8), and if it is "0", changes all flags to "1" (9). The server is left idle for 20 msec (10). After 20msec elapses, the server switches to the execution mode and resumes work (2).

After processing the server's queue message or if the DPRAM status flag is not "0", check whether there is a message to be processed from the DPRAM (11), if present, deliver the message to the client (12) and then re-queue the server's queue. Enter the investigation process (13). If there is no DPRAM message, change the DPRAM status flag to "0" (14). Check if the queue status flag is "0" (15) and if it is "0", change all flags to "1" (9) and leave the server idle for 20msec. (10) 20msec has elapsed. It will enter the run mode and work again (2).

If the maximum number of DPRAM received messages is 10, the server repeats the queue and DPRAM message processing process 10 times. In this situation, because the call processing message is congested from the network, the message is not transferred to the server in idle mode. Re-enter the process of receiving (2).

Accordingly, the present invention carried out by the above processing procedure can be applied to connect the network connection unit and the main function processing modules composed of hardware, which is a general structure of the protocol processing systems used in the communication network, The same short message is introduced in large quantities and is suitable for systems requiring real time processing.

In addition, by optimizing scheduling for CPU usage, the system can efficiently use system resources, improve CPU throughput, and reduce latency of transmission and reception messages, thereby providing high quality communication services to service subscribers.

Claims (3)

CCITT no.7 MTP Processor (CMP) with hardware and network management software such as common line signal link for CCITT No.7 protocol processing, Common Channel Signaling Processor (CCP) with network service protocol processing software, Servo Logic Processor (SLP) with higher protocol processing and service logic software, OAP (Operation and Administration Processor) with software and user interface devices to provide system operation management and maintenance. Applied to an intelligent network service control system having a local area network (LAN) that provides an interconnection function, a method of performing a matching function with a network connection unit, wherein the server, which is a process performing a message input / output operation, operates an input / output scheduler. DPRAM in the communication board whenever there are messages received After performing the first step (1, 2) of commanding to read the message and the first step (1, 2), the server's input / output scheduler checks whether the message transmitted from the server queue is in the server's queue, and if the message exists, Command to output a message, divide the message into a slot structure, write the message to DPRAM, and if the message is not in the service queue, check the status flag of the DPRAM (3 to 8), and the second step (3 to 8). After the execution, if the DPRAM status flag is "0", the server is left idle for a certain time for real time processing and returns to the first step (1, 2), and the DPRAM status flag is not "0", After the third step (8 to 11) of checking whether there is any message to be processed from the DPRAM, and after performing the third step (8 to 11), if there is a message to be processed, the corresponding message is transmitted and the DPRAM receiving message is maximum. If it's 10, the service queue And a fourth step (12 to 15) for changing the DPRAM status flag to "0" and performing a process according to the queue status flag. The matching method according to claim 1, wherein the predetermined time for leaving the server idle in the third step (8 to 11) is performed at 20 m seconds. 3. The processing according to the queue status flag in the fourth step 12 to 15, after setting the DPRAM status flag and the queue status flag to "1" if the mu status flag is not '0', A method of matching with a network connection of an intelligent network element system, characterized in that the server remains idle for 20m seconds and then returns to the first stage (1, 2).