KR19990050370A - How to configure AT link exchange link maintenance function - Google Patents

Abstract

The present invention is a module of a consistent concept that maintains the integrity of a connection link, which is a physical transfer of data between resources, in a distributed switching system in which a plurality of resources such as an ATM switching system provide services through a complex configuration on an organic connection with each other. In this case, the present invention relates to a method for configuring a link link preservation function of an ATM switch which provides a model of a link link preservation function that provides a state by clearly distinguishing a fault derived from a fault of a higher circuit and a link itself. .

As described above, the present invention simply establishes a model of the maintenance function of the ATM exchanger, and applies the same model to all the resources constituting the exchange, to connect the hardware circuit resource and the circuit resource on the basic model to efficiently establish the maintenance function. It is possible to easily and efficiently configure the maintenance function by inheriting the basic model while clearly distinguishing the failure of the link link that is the line. In addition, the present invention is easy to configure the maintenance function for each resource because even if an error occurs due to the abnormal operation of the maintenance function itself that can occur in the configuration process based on the same model with a slight model change Self-verification can be verified, increasing the maintenance reliability of the software itself in the integrity of the ATM exchange.

Description

How to configure AT link exchange link maintenance function

The present invention relates to a method for configuring a link link maintenance function of an Asynchronous Transfer Mode (ATM) exchange. In particular, each resource in a distributed switching system in which a plurality of resources such as an ATM switching system performs a service through a complex configuration on an organic connection with each other. Link link maintenance that provides the status by clearly distinguishing the faults derived from the fault of the upper circuit and the fault of the link itself when the integrity of the link link, which is the physical transfer of data between the modules, is composed of a consistent module. The present invention relates to a method for configuring a link link integrity function of an ATM exchange to provide a model of the function.

In the past, the maintenance function of exchanges was made under different concepts and configurations without a consistent model of the existence of the corresponding resource for each resource. Therefore, despite the similar form of function, it is composed according to each separate design, which causes a lot of difficulty in maintaining the software itself and has a disadvantage in improving reliability. In addition, in case of failure caused by the failure of the circuit when it is dependent on the state of two hardware circuits such as connection link, the message can be applied to the circuit state and the link state in order to derive many messages, Could not provide.

The present invention is a module of a consistent concept that maintains the integrity of a connection link, which is a physical transfer of data between resources, in a distributed switching system in which a plurality of resources such as an ATM switching system provide services through a complex configuration on an organic connection with each other. In this case, it provides a method of configuring a link link preservation function for an ATM switch that provides a model of a link link preservation function that provides a state by clearly distinguishing a fault derived from a fault of a higher circuit and a fault of the link itself. .

Means for achieving the object of the present invention configured as described above in the test / monitoring of the connection link, if there is no response as a result of requesting a test to the circuit to which the connection link is connected, by requesting a test / monitoring of the circuit If the test is successful, it is determined that the connection link is fixed, and if the circuit test fails, the first step of determining that the circuit is fixed, and in the case of the test / monitoring of the connection link, the connection link is failed. A link link test / monitoring step comprising a second step of determining whether a link link failure is due to a pure connection line failure or a fixation of the other circuit by allowing a test to be performed on a counter circuit to which a link is connected, and a test / monitoring step. In changing the failure state of the connection link by means of a counterpart, if the test / monitoring is successful, When a hard state to a recovery and relative circuit failure information is entered as a result of the first step of managing the state and the circuit fault conditions; A library providing a failure state of a connection link, comprising: a second process of providing a connection link state by retrieving a circuit state through a circuit state library and reflecting the state of the connection link when called due to a search of the connection link Link failure state library generation step.

1 is a schematic diagram of an ATM switch system.

2 is an ATM switch connection link configuration.

3 is an ATM switch connection link integrity function configuration diagram.

4 is an ATM switch connection link test / monitoring model flow diagram.

5 is an ATM switch connection link state library model flow diagram.

(Explanation of symbols for the main parts of the drawing)

101: ACS 102,103: ALS

104: ISNM 105: OMP

106107: Software 108: Hard Disk

109: flow storage device 110: fault detector

111: network mover 112: operating system

113,113a: ASNM 118,118a: call control processor

119,119a: software 120,120a: software

1 is a block diagram of an ATM switching system for explaining an embodiment of the present invention.

As shown in FIG. 1, an ATM switching system includes one or more distributed ATM Switching Subsystem (ALS) 102 (103) and an Central Switching Subsystem (ACS). 101 is configured.

The subscriber switching subsystem (ALS) 102, 103 each includes a local switching module, Access Switching Network Module (ASNM) 113, 113a, and a call control processor for user call processing and maintenance. (CCCP: Call and Connection Control Processor) (118) (118a) is implemented to handle functions including call services, subscriber interface module (SIM) 115 (115a) for subscriber matching, TIM for relay call matching (Trunk Interface Module) 117 (117a).

The operation of the ATM switching system configured as described above is as follows.

First, the ALS 102, 103 operates as a concentrator having an aggregation ratio of n: m, where n is the number of user-side links 116, 116a, and m is the number of switch-side links 114, 114a. ACS 101 performs the interconnection function between subscriber ALS 102 and 103 to act as a distribution device for large capacity systems.

The call request of the subscriber enters into the subsystem via the subscriber link 122, 122a connected to the SIM 115, 115a, and the relay call is recognized by the subsystem via the trunk line link 121. Software (sw) 119 (119a) for controlling a recognized call is mounted in a Call Control Processor (CCCP) 118 (118a) to perform call control and assign switch ports to control the internal path of call exchange. Software (sw) 120, 120a is also mounted and operated on CCCP 118, 118a.

ACS 101 is in charge of the connection between the ALS 102, 103 and operation maintenance function, ACS 101 is in charge of the connection between the ALS (102), 103 Interconnect Switch Network Module (ISNM) (104) 104a is mounted. The ACS 101 has an OMP (Operation and Maintenance Processor) 105 processor for the entire system's operation maintenance, and charges the main function, and not only the system level maintenance, test, measurement and statistics functions, but also various functions with the operator. Perform I / O control function.

The OMP 105 is equipped with software 106 for controlling connection of the ISNM 104 and software 107 for collecting information for charging to execute main functions related to the service. A hard disk 108 in which information on billing, system data and software are stored, and a flow storage device 109 for carrying various data out of the system are mounted in the ACS 101. Status information and operation information of the exchange are output in text or graphic form. A workstation that provides an interface with the user and serves to visualize the information is connected to the exchange to the operating system 112, and the connection protocol uses Ethernet. The ACS 101 is equipped with a network synchronizer 111 for synchronizing the entire system with the switching network, and the ACS 101 and the ALS 102, 103 are externally mounted to detect a failure of hardware. The fault detector 110 is mounted.

2 illustrates a connection link diagram of an ATM switch in which an embodiment of the present invention operates.

It is classified into the subsystem of FIG. 1 and is connected by a physical link between hardware and hardware resources in a configuration in which each hardware is mounted. There is a physical connection between the matching resource 115 and the hardware of the ASNM switch 113 in the ALS 102 (201), the ASNM 113 in the ALS 102 and the ISNM in the ACS 101 ( 104-1) and 104-2, a physical connection exists between the hardware to exchange data.

Information about the connection link between the ASNM switch 102 and the ISNM switches 104-1 and 104-2 is located in both the ALS 102 and the ACS 101 (202, 203). The connection link is the basic information for determining the progress of the service and is managed depending on the state of the physical circuit to which the connection link is connected.

3 is a block diagram of a maintenance function of an ATM switch in which an embodiment of the present invention operates.

In the system configuration of FIG. 1, a model of the same maintenance function configuration is applied to all resources related to the exchange service. Applied to matching, switch, processor, connection link, software, network synchronizer, fault detector, hard disk, and floating storage device. If various resources have hierarchical structure, it is more subdivided to configure the same maintenance function for each resource. The model is applied.

In FIG. 3, the maintenance function includes a configuration management 301, a test / monitoring 303, a failure report 304, a failure state library 305, a quality statistics library 307, and a quality monitoring 308. It provides maintenance of resources to the operator who operates the service function and system to be wanted.

The link preservation function is started to the configuration management function 301 which reflects the presence or absence of the implementation of the resource in the configuration information on the database or the memory when an event in which the resource is mounted or unmounted occurs. The shape management function 301 immediately informs the connection link test / monitoring function 303 of the change of the shape as soon as an incident occurs. The test / monitoring function 303 is a function for judging failure and recovery of a resource. The test / monitoring function 303 is a function for determining a failure or recovery of a resource, by requesting a test from a hardware resource 302 including firmware or requesting information and receiving a result. It can be determined whether the resource has failed or is normal.

In addition, there is a failure report function 304 that directly receives and processes the result when a failure or failure recovery occurs in a hardware resource to process the failure report. The test / monitor function 303 of the connection link conveys a message requesting a test to the two link connection circuit test / monitor functions 309 and 310 to determine the failure of the link itself. The processing of the fault report ends with notifying the test / monitoring function of the event and performing the test.

The abnormality of resources through the test / monitoring function is managed as shared data using the failure status library 305 of the connection link. The failure state library 305 calls the link connection circuit state library 311 to provide the state information of the upper connection connection circuit when providing the state.

The failure state library 305 is responsible for storing the change information of the state and transferring the information to the function requesting the change information. There is a service function 306 that enforces the occupancy of the corresponding resource based on the information delivered by such a failure state library. The service function 306 delivers information about attempts, successes, and failures of the service to the maintenance function through the quality statistics library 307.

The quality monitoring function 308 periodically reads the shared service statistics information of the quality statistics library and considers the failure rate, and requests the test / monitoring function for the test / monitoring function when the failure rate is higher than a certain rate.

4 is a flowchart illustrating an ATM switch connection link test / monitoring model according to an embodiment of the present invention.

The link link test / monitoring function is located at the ALS and ACS and starts with the start-up.The test / monitoring cycle is referred to the database and the initial value is set in the operating system (S401). Run it repeatedly. The test / monitor function performs a test / monitoring request message, executes a test / monitoring, receives a test / monitoring time message at a registered interval from the operating system, performs a test / monitoring process, and receives a test / monitoring cycle change message. After resetting the operating system, test / monitoring is performed to execute the function.

When receiving a message requesting a test / monitoring (S402), it is checked whether the corresponding resource is a resource registered in the shape (S403), and if it is an unmounted resource, a response message for the test request is transmitted to the requesting function (S411). In the case of the implemented resource, the test / monitoring signal message requesting the test is transmitted to the resource to which the corresponding link is connected (S404).

If there is no response from the resource (S405), a circuit test / monitoring is requested for the circuit in order to detect whether there is an error in the circuit of the resource (S406). If the response to the test / monitoring request for the link is unsuccessful (S407), a test / monitoring of the circuit is requested to the counter circuit connected by the link (S409) to check whether the counterpart circuit is broken.

If the counterpart circuit is normal (S410), a failure has occurred due to a failure of the link itself, and if the counterpart circuit is abnormal, it is a propagation failure due to a breakdown of the counterpart circuit. The result is called by the library and transmitted, the state information of the connection link is changed (408), and a test / monitoring response is made (S411).

When the test / monitoring time message is received from the operating system in a cycle (412), the test / monitoring request message is transmitted to itself (S413) and the test / monitoring is performed (S402).

When receiving the change request message of the test / monitoring period through the operation command (414), the test / monitoring period is reset to the operating system (S415), and the test / monitoring request message is delivered to itself (S416) to proceed with the test. And transmits to the requested function that the change of the test / monitoring cycle is completed (S417).

5 is a flowchart illustrating an ATM switch link link failure state library model according to an embodiment of the present invention.

The failure status of the link manages important information used directly for the exchange of real data. It is identically located in ALS and ACS. It is a library that is called from the test / monitoring function to change the information and is called from the service function to provide status information in order to provide the function of executing the service with the status of whether the connection link is serviceable and whether there is a failure.

In the initialization (S501), which is classified as a function of providing a part and a state called from the initialization and test / monitoring to the service function, and is performed at startup (S501), the service state of the connection link is initialized to be serviceable (INS), and various failures are recovered. Initialize to (off) (S502).

When called from the test / monitoring function (S503), if the test / monitoring result is success (S504), the service state is set to serviceable (INS) (S505), and failure occurrence by the counter circuit is restored (off). If there is an alarm generated, the alarm is released (S506).

If the test / monitoring result is unsuccessful, the state is set as an out-of-service state (OOS) S507 and the fault state caused by the counter circuit is replaced with the value transmitted from the test / monitoring result. Generate an alarm (S508). If the call of the library is through the test / monitoring by the failure report (S509), when a failure occurs (S510), the failure state is generated (S511) and a failure message is output (S512).

When the failure is recovered, the failure state is set as recovery (S513) and a failure recovery message is output (S514). When a library is called (S515) by executing a test / monitoring by quality monitoring, when a failure occurs (S516), a failure state is generated (S519) and a failure message is output (S520). When the failure is recovered, the failure state is restored (S517) and a failure recovery message is output (S518).

When called to retrieve information about a failure state of the connection link (S521), the state information of the connection link is provided together with the state of the upper circuit to which the link is connected. The link is dependent on the state of the connected circuit, but the library manages only the state of the link purely to prevent inconsistency that may occur due to the redundancy of the data and the state of the upper circuit. Therefore, when searching for a link failure status, a circuit failure status library that manages the status of the upper circuit is called (S522). The upper circuit state information is provided together with the connection link state (S523).

The present invention is a data line that connects hardware circuit resources and circuit resources on a basic model that simply establishes a model of the maintenance function of an ATM exchanger and efficiently establishes the maintenance function by applying the same model to all the resources constituting the exchanger. By clearly distinguishing the failures of connecting links, it is possible to easily and efficiently configure the maintenance function by inheriting the basic model.

In addition, the present invention is easy to configure the maintenance function for each resource because even if an error occurs due to the abnormal operation of the maintenance function itself that can occur in the configuration process based on the same model with a slight model change Self-verification can be verified, increasing the maintenance reliability of the software itself in the integrity of the ATM exchange.

Claims (1)

In the test / monitoring of the connection link, if there is no response as a result of requesting the test to the circuit to which the connection link is connected, the test / monitoring of the circuit is requested and if the circuit test is successful, the connection link is determined to be fixed. If the circuit test fails, in the first step of determining that the circuit is fixed and in the test / monitoring of the connection link, if the test of the connection link fails, the test is performed on the counterpart circuit to which the connection link is connected. A connection link test / monitoring step comprising a second process of determining whether a failure of the connection link is caused by a pure connection line failure or by fixing of a counterpart circuit; In changing the fault condition of the connection link by test / monitoring, if the test / monitoring is successful, the state is returned to the serviceable state to recover the counter circuit fault state, and when the counter circuit fault information is input as a result, the state circuit fault state is entered. A first process of managing the; A library providing a failure state of a connection link, comprising: a second process of providing a connection link state by retrieving a circuit state through a circuit state library and reflecting the state of the connection link when called due to a search of the connection link And a link failure state library generation step.