KR20040036069A - Method for managing of Permanent Virtual Circuit connection data in Asynchronous Transfer Mode Exchange - Google Patents

Abstract

PURPOSE: A PVC connection information managing method in an ATM(Asynchronous Transfer Mode) exchange is provided to make both PVC connection information identical by automatically comparing a PVC(Permanent Virtual Circuit) connection information of a control system board and PVC connection information of a matching system board when either board is switched or dismounted. CONSTITUTION: When an AMPA(ATM Main Processor board Assembly) detects that duplexed AMPA or CCCP(Call and Connection Control Processor) is switched or dismounted(S2), the AMPA reports corresponding situation to an operator(S4), initiates an inserted timer(S6) and determines whether counted time reaches a pre-set time(S8). If the counted time reaches the pre-set time, the AMPA requests PVC information from the CCCP(S10). When the PVC connection information is received, the AMPA compares it with its own PVC connection information(S12). If two PVC connection information are not identical(S14), the AMPA displays an alarm message to an EMS(Elementary Management System) or informs the operator accordingly(S16). The AMPA determines whether a correction command on the PVC connection information is inputted from the EMS(S18). When the correction command is inputted, the AMPA deletes only the discordant portion of the PVC connection information of the CCCP, and transfers the PVC connection information on the basis of the PVC connection information stored in the AMPA to make the two PVC connection information identical(S20).

Description

Method for managing of Permanent Virtual Circuit connection data in Asynchronous Transfer Mode Exchange}

The present invention relates to a method of managing PVC connection information in an ATM switch, and more particularly, to a method of managing the PVC connection information stored in the control system board and the PVC connection information stored in the matching board in the ATM exchange. .

In general, high-speed broadband networks using asynchronous transfer mode (hereinafter referred to as ATM) technology have been realized as a network supporting multimedia communication due to the development of technology such as digitization of voice and video and optical fiber. ATM is a technology that can freely allocate communication channels from low-speed low-capacity communication to high-speed broadband communication. It divides the information to be transmitted by 48 bytes and adds 5 bytes of headers containing label information (Cell Routing and Traffic information). Information is transmitted in units of cells having a fixed length of 53 bytes in total. ATM cells are sent to the ATM network and exchanged at high speed in hardware according to the header, which is called self routing. The cell arriving at the intended receiver is reconstructed with the actual information after inspecting the header. For reference, self-routing is a routing scheme in which a cell selects a communication path to go by itself according to header information.

ATM technology is the basis for multimedia communications that can provide a variety of applications such as video telephony, video conferencing, postal services such as mailboxes in the network, and video on demand services. For example, if you need to exchange voice, video, and video at more than one point (one-to-one, group-to-group), such as video conferencing, both parties must have the same amount of information (channels), but this is unrealistic. Because the audio can be compressed from 64Kbps to 16Kbps by digital compression, and the video requires 1.5 ~ 6Mbps transmission capacity even when using MPEG video compression technology. When exchanging data at the same time, more bandwidth than 10Mbps is required.

Therefore, it is necessary to allocate video, audio, and data to different virtual channels to satisfy each request independently on an ATM network that provides a communication channel of a necessary band according to the communication partner and the contents of communication.

A general ATM switching system is composed of a subscriber matching module (UNI), a switch network, a network node interface (NNI), and a processor controlling the same. Looking at the physical structure of the ATM switching system, the call processing function is realized in a horizontal distributed structure, and the maintenance function is realized in a vertical distributed structure.

Call processing is performed in a distributed manner in the ATM Local Switching Subsystem (ALS), which provides services to subscribers or other exchanges, for example, signaling protocols for subscribers or relay lines connected to ALS. Processing functions, connection connection functions, call connection functions, and number translation functions are performed in each ALS.

The maintenance function is that if the caller and the called party are not in the same ALS, the connection between the required ALSs is via the ATM Central Switching Subsystem (ACS). The ALS consists of a vertical distributed structure that instructs the ALS to make statistical measurements, maintenance tests, troubleshooting, etc., and notifies the ACS of various data.

As shown in FIG. 1, such an ATM switch is largely an ATM local exchange / subscriber (hereinafter, ALS / S: ATM Local Switching / Subscriber Subsystem, 210), an ATM local exchange / trunk (hereinafter, ALS / T: ATM Local Switchig / Trunk). Subsystem 220) and ACS 230.

In addition, the ALS / S 210 includes as many subscriber matching modules (hereinafter referred to as Subscriber Interface Modules) as the number of subscribers (hereinafter referred to as SIMs 211 and 212) and access switching network modules (hereinafter referred to as ASNM: access switching network modules) to accommodate the SIMs 211 and 212. 213, a call and connection control processor (CCCP: Call & Connection Control Processor (CCCP) 214) for controlling a subsystem, and the ALS / T 220 includes as many trunk matching modules (hereinafter TIM: Trunk) as the number of trunks. Interface Modules (221, 222) and Access Switching Network Modules (hereinafter referred to as Access Switching Network Modules (ASNMs) 223) that accommodate them, call and connection control processors (CCCP: Call & Connection Control Processors) 224 to control subsystems. It consists of.

In addition, the ACS 230 is composed of an interconnection switch network module (hereinafter referred to as an ISNM: Interconnection Switch Network Module (ISNM) 231 and an operation preservation processor (OMP) 232, the OMP 232 is a cell multiplexing and demultiplexing block) (CMDH: Call Mux / Demux H / W Assembly) 233, ATM cell generator (hereinafter SPCA: Sbus interface Processor Communication board Assembly) 234, ATM Main Processor Block Assembly (AMPA) (235) ) And a disk 236, cartridge tape (CT) 237, etc., connected to the AMPA 235.

And, it is configured with an EMS (Elementary Management System) 240 is connected to the AMPA 235 of the OMP 232 to perform a maintenance management command of the operator, the EMS 240 is configured a plurality of console (Console) It performs a function to control a plurality of ATM switch system through a single graphical user interface (GUI).

Meanwhile, the CCCP 214 of the ALS 210 and 220 and the AMPA 235 of the ACS 230 have a fixed virtual circuit (PVC) connection information for subscriber access, and the operator connects the PVC. When requesting a setting, the AMPA 235 and CCCP 214 establishes a connection to the PVC based on the PVC connection information. The PVC connection information has routing information (VP (virtual path) / VC (virtual channel)) for subscriber traffic transmission, class class (priority of traffic transmission: CBR, VBR, UBR) and traffic parameters (up and down) of subscriber data. Baud rate).

Initially, when the operator transmits the PVC connection information through the EMS 240, the AMPA 235 of the ACS 230 stores the PVC connection information and at the same time, the CCCP of the corresponding Shelf of the ALS 210, 220 through IPC communication. The same PVC connection information is stored in the CCCP 214 by transmitting to 214.

On the other hand, the PVC connection information stored in the AMPA (235) and CCCP (214, 224) may be different from each other, in this case, first, when establishing a PVC connection or delete the PVC connection in the AMPA communication channel between the two boards When the command is transmitted through the IPC, the IPC is lost and the connection information may be different. When the duplication state of the AMPA 235 is abnormally generated, that is, one of the active AMPA and the standby AMPA is reset or reset. When unmounting occurs, PVC connection information is matched with each other. In the process, the AMPA PVC connection information and CCCP (214) of active AMPA are not correctly transmitted. , 224) stored in the PVC connection information is different.

When the PVC connection information of the AMPA 235 and the CCCP 214 and 224 do not match with each other, if the PVC connection setting is requested from the operator, connection information is not generated in the active AMPA and an abnormal error occurs.

In addition, when AMPA 235 having incorrect PVC connection information is mounted and operated, traffic flow may be interrupted among subscribers that are considered normal PVC connections, and AMPA with incorrect PVC connection information is continuously operated. In this case, the problem of interrupted traffic flow may occur because the abnormal PVC connection information is retained even when the new AMPA is replaced.

In order to solve the above problem, conventionally, the CCCP of the corresponding Shelf having different connection information from AMPA is reset or demounted to cut the IPC which is the communication channel between the AMPA and the CCCP, and reconnect to store the CCCP stored in the AMPA. Although we are using the method of reacquiring the PVC connection information, this means that all the PVC connection information stored in the CCCP is truncated when the CCCP is dismounted, which poses a huge risk of interrupting the entire traffic of the subscriber module (SIM) controlled by the CCCP. There is a problem.

Therefore, the present invention was made to solve the above-described problems, and the control system board or matching board is automatically compared with the PVC connection information stored in the control board and PVC connection information stored in the control board when switching and unmounting The purpose of the present invention is to provide a method of managing PVC connection information in an ATM switch that matches the PVC connection information.

Another object of the present invention is to provide a method for managing PVC connection information in an ATM switch that matches the PVC connection information stored in the control system board with the PVC connection information that is matched to the board even at the request of an operator.

1 is a detailed block diagram of an ATM switch.

2 is a flowchart illustrating a method for managing PVC connection information in an ATM switch according to an embodiment of the present invention.

PVC connection information management method in the ATM switch according to a preferred embodiment of the present invention to achieve the above object,

Matching board that subscriber or trunk is matched and PVC connection information for setting up PVC connection is stored and call processing function is managed, and PVC connection information for managing PVC connection setting is stored and maintenance function is managed. In the PVC connection information management method in an ATM switch having a control system board for performing the

A first step of notifying an operator of a system board state change alarm after the switching and unmounting of the matching board or the control board is detected and time elapsed;

A second process of requesting PVC connection information from the control board to the matching board when the elapsed time reaches the preset time;

A third step of comparing, by the control system board, the pre-stored PVC connection information with the PVC connection information received from the matching board, if the PVC connection information of both boards is inconsistent, sending an alarm for notifying the discrepancy of the PVC connection information to the operator;

And a fourth process of matching the mismatched PVC connection information based on the PVC connection information stored in the control system board.

In addition, PVC connection information management method in the ATM switch according to a preferred embodiment of the present invention to achieve the above object,

Matching board that subscriber or trunk is matched and PVC connection information for setting up PVC connection is stored and call processing function is managed, and PVC connection information for managing PVC connection setting is stored and maintenance function is managed. In the PVC connection information management method in an ATM switch having a control system board for performing the

A fifth process of deleting, by the control system board, the mismatched PVC connection information among the PVC connection information stored in the matching board through the interprocessor communication (IPC);

The control system board is characterized in that it comprises a sixth process of matching the PVC connection information of the control system board to the matching board by transmitting the PVC connection information to the matching board based on the PVC connection information stored therein.

In addition, PVC connection information management method in the ATM switch according to a preferred embodiment of the present invention to achieve the above object,

Maintenance function by matching the subscriber or the trunk and matching connection board for storing PVC connection setting and performing call processing function, and managing the state of the matching board and storing PVC connection information for setting PVC connection. In the PVC connection information management method in an ATM switch having a control system board for performing the

A seventh step of requesting the transfer of the PVC connection information stored in the matching board through the inter-processor communication (IPC) when the command of the PVC connection information is commanded from an operator;

The control system board is characterized in that the eighth process of deleting the mismatched PVC connection information among the pre-stored PVC connection information to match the PVC connection information received from the matching system board.

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

With reference to the flowchart shown in Figure 2 will be described in detail the PVC connection information management method in the ATM switch according to an embodiment of the present invention.

The AMPA 235 of the ACS 230 corresponding to the control system board has a system-wide control management function such as state management and PVC connection information control of the CCCP 214 of the ALS 210 and 220 corresponding to the matching board.

When the AMPA 235 detects switching or demounting of the redundant AMPA or CCCP (214, 224) (Yes in S2), an alarm for notifying the state change of the board is output to the EMS 240 to the operator. The situation is reported (S4), the built-in timer is started (S6), and it is determined whether the counted time reaches a preset time by the timer (S8).

As a result of the determination, when the counted time reaches a preset time by the timer (Yes in S8), the PVC connection information is requested to the CCCPs 214 and 224 through the IPC (S10), and the CCCP ( When the PVC connection information is transmitted from 214 and 224, the PVC connection information is compared with the PVC connection information stored in the AMPA 235 (S12).

As a result of the comparison, if the PVC connection information stored in the AMPA 235 and the PVC connection information transmitted from the CCCPs 214 and 224 do not match (No in S14), an alarm message for notifying the inconsistency of the PVC connection information is EMS ( In operation S16, the controller 110 displays the information on whether the PVC connection information is inconsistent between the two boards by displaying the display or creating a new pop up window (S16).

Subsequently, the AMPA 235 determines whether a modification command for the PVC connection information is input from the EMS 24 (S18), and if the modification command for the PVC connection information is input from the EMS 24 as a result of the determination (S18). Yes), the AMPA 235 deletes only the mismatched connection information among the PVC connection information of the CCCP 214 and 224 through the IPC, and then assigns to the CCCP 214 and 224 based on the PVC connection information stored in the AMPA 235. After passing the PVC connection information to match the PVC connection information of the AMPA (235) to CCCP (214, 224) (S20) and ends the series of processes.

On the other hand, although not shown in Figure 2, when the operator is commanded to match the PVC connection information through the EMS 240, AMPA 235 deletes only the PVC connection information inconsistent with the CCCP (214, 224) through the IPC Based on the PVC connection information of the AMPA 235, the PVC connection information is transmitted to the CCCP (214, 224) through IPC to match the PVC connection information of the control board and the PVC connection information of the matching board.

In addition, the present invention, when the operator is commanded to match the PVC connection information through the EMS 240, AMPA 235 deletes the mismatched connection information of the pre-stored PVC connection information, and then through the CCCP (214, 224) ) May require the delivery of PVC connection information, and match the PVC connection information of the AMPA 235 based on the PVC connection information transmitted from the CCCP (214, 224).

According to the present invention as described above, there is an advantage that the reliability of the system can be improved by preventing the PVC connection information is inconsistent when switching and unmounting the control board or the matching board, there is an advantage of the control board or matching board Even if the PVC connection information is inconsistent, the PVC connection information can be matched without cutting the PVC connection information of the entire subscribers of the shelf, thereby providing a quality service to the subscribers without traffic interruption and cell loss. .

On the other hand, the present invention is not limited to the above-described embodiment, but can be modified and modified within the scope not departing from the gist of the present invention, such modifications and changes should be regarded as belonging to the following claims. will be.

Claims (5)

Matching board that subscriber or trunk is matched and PVC connection information for setting up PVC connection is stored and call processing function is managed, and PVC connection information for managing PVC connection setting is stored and maintenance function is managed. In the PVC connection information management method in an ATM switch having a control system board for performing the A first step of notifying an operator of an alarm when the transfer and removal of the matching board or the control board is detected, and then displaying an elapsed time; A second process of requesting PVC connection information to the matching board by the control board when the elapsed time reaches the preset time; A third step of comparing, by the control system board, the pre-stored PVC connection information and the PVC connection information received from the matching board, if both PVC connection information are inconsistent, an alarm for notifying the mismatch of the PVC connection information to the operator; And a fourth process of matching the mismatched PVC connection information based on the PVC connection information stored in the control system board. The method of claim 1, The alarm transmitted to the operator in the third process is PVC connection information management method in the ATM exchange, characterized in that output to the operator terminal in the form of a pop-up window. The method of claim 1, The fourth process is performed when the PVC connection information matching command is input from the operator. Matching board that subscriber or trunk is matched and PVC connection information for setting up PVC connection is stored and call processing function is managed, and PVC connection information for managing PVC connection setting is stored and maintenance function is managed. In the PVC connection information management method in an ATM switch having a control system board for performing the When the operator is commanded to match the PVC connection information, the control system board compares the pre-stored PVC connection information through the inter-processor communication (IPC) and the PVC connection board of the matching board, the mismatched PVC connection information is determined. A fifth process of deleting from the total board; The PVC connection information in the ATM switch, characterized in that the control system board is stored in the PVC connection information stored in the matching board to match the PVC connection information of the matching board and the control board board; How to manage. Matching board that subscriber or trunk is matched and PVC connection information for setting up PVC connection is stored and call processing function is managed, and PVC connection information for managing PVC connection setting is stored and maintenance function is managed. In the PVC connection information management method in an ATM switch having a control system board for performing the A seventh step of requesting the transfer of the PVC connection information stored in the matching board through the inter-processor communication (IPC) when the command of the PVC connection information is commanded from an operator; The control system board deletes the PVC connection information that does not match the PVC connection information transmitted from the matching board from the pre-stored PVC connection information, and then stores the PVC connection information received from the matching board in the control system board to connect the PVC connection information. PVC connection information management method in an ATM switch, characterized in that consisting of the eighth process to match.