KR970011431B1 - Full electronic switching system - Google Patents

Abstract

The present invention provides a method of auditing a trunk line/subscriber line condition periodically to monitor lines that are not used in actual processings of calls and convert the state of those lines into idle one, thus removing discord of the trunk line/subscriber line in condition, and performing management of lines efficiently. The inventive method includes the steps of: determining if a child process exists once receiving that an audit timer for trunk line audition is completed; repeating the first step if the audit about all the trunk lines is not performed, and repeating the standby step of the timer completion if the audit about all the trunk lines is performed; and performing the second step if the trunk line is in an idle state, and converting the trunk line's state into an idle one and performing the second step if the junction line is in an idle state.

Description

Audit Method for Eliminating Mismatch of Relay / Subscriber Line Status in Electronic Switching System

1 is a structural diagram of a general electrical exchanger.

2 is a block diagram of a call processing block of an electro-electric exchanger to which the present invention is applied.

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

＊ Explanation of symbols on main parts of drawing

11: switched subsystem 12: network subsystem

13: central control subsystem 21: number translation processor

22: outgoing exchange processor 23: incoming exchange processor

The present invention relates to an auditing method for resolving inconsistency in the state of relay line / subscriber line by auditing the state information on the relay line / subscriber line in the electronic switchboard.

Conventionally, an idle line that is not used for actual call processing does not become idle due to system instability or an error in performing the operation of making the relay line / subscriber line state idle after the call processing ends. Inconsistency occurs.

The circuit in which such a state mismatch occurs can not be used for relay call / subscriber call processing even though it is actually an idle (Idle) line, there is a problem that the line management in the electronic switchboard is inefficient.

In order to solve the above problems, the present invention provides a process for auditing a relay line / subscribe line in an electronic switch (process for periodically monitoring the operating state of the switch and preventing an abnormal phenomenon of software resources inherent in the switch). By periodically performing the function, the line state is busy but the line state that is not used for actual call processing is changed and the line state is idle. The purpose of this is to efficiently manage circuits.

In order to achieve the above object, the present invention implements a database for ID information of a child processor and processes a relay call and a subscriber call.

Implement a database for the calling processor, child process ID information, and a call processor that handles relay and subscriber calls, and a number translation processor that translates the called number and manages route and line status. Applied to the system with the system, when the system is started in the idle state, the initial audit timer for the relay line audit is started, the audit timer is terminated, and then the audit timer After the first step is performed to determine whether the child processor exists by inquiring whether or not the child processor exists for the relay line, when the child processor for the relay line exists. If all audits have been audited and no audit procedures have been performed for all In the case of repeating the process of inquiring the presence of the subprocessor in the first relay line, if the audit procedure is performed for all the relay lines, the audit timer is restarted. After performing the first step and the second step of repeating the waiting process of waiting for the audit timer, and if the child process for the relay line does not exist, the status of the relay line performing the audit is examined. If the relay line state is idle, the second step is performed. If the relay line state is not idle, the relay line state information is changed to the idle state and then the second steps 41 and 42 are performed. An audit method for eliminating mismatches in the relay line state, including the third step, and an initial timer for subscriber line audits when the system is started in idle state. A fourth step of determining whether a child process exists by querying for the existence of a child processor for a subscriber line when the audit timer is terminated and then receiving an audit timer has expired. After performing the fourth step, if there is a child process for the subscriber line, it is checked whether all the subscriber lines in the system are audited and if the audit procedure for all subscriber lines is not performed, In the case of repeating the process of inquiring the presence of the subprocessor for the subscriber line of the fourth stage and performing an audit procedure for all subscriber lines, the fourth timer is restarted after the audit timer is restarted. Subscriber line after the fifth step and the fourth step of repeating the process of waiting for the audit timer to be received If no child process exists for the subscriber line, the state of the subscriber line performing the audit is examined, and if the subscriber line state is idle, the fifth step is performed, and the subscriber line state is idle. Otherwise, the subscriber line state information is changed to an idle state (Idle), and then the auditing method for eliminating inconsistency of the subscriber line state includes a sixth step of performing the fifth step.

In the present invention, the relay call / subscriber call processing block in the electronic switchgear has a certain period of time and analyzes the state information on the relay line / subscribe line, and uses the primitive of the operating system CROS (Concurrent Real-time Operating System). Checks for the existence of a child process associated with the line.

In the relay call / subscriber call processing block, if the child process does not actually exist and the relay line / subscriber line state is busy, the relay line / subscriber line state information is switched to the idle state and the line is relayed. It can be used for call / subscriber call processing.

Hereinafter, with reference to the accompanying drawings will be described in detail an audit method for a relay line in another embodiment of the present invention.

FIG. 1 is a schematic diagram of a general electronic switching system. As shown in the drawing, three diagrams of an Access Switching Sub-sysytem (ASS), an Interconnection Network Subsystem (INS), and a Central Control Subsystem (CCS) 13 are shown. With a subsystem.

ASS 11 is equipped with subscriber and trunk interface, time switch (T-switch), various signaling devices, packet handlers, etc. to perform most call processing functions and self-maintenance functions. It has a distributed structure.

Up to 60 ASSs 22 can be connected via the INS 12 and the transmission medium between them is an optical link.

INS (12) is located in the center of the system and performs the function of connecting between the ASS (11) mutually or between the ASS (11) and the CCS (13) and the space switch (space) of the time-space-time (TST) switch structure switch) is located here. It performs number translation, space switch connection function among call processing functions, and also has a function of generating and distributing a system clock with a network synchronizer.

The CCS 13 serves as a subsystem that performs the overall maintenance function of the system.

2 is a block diagram of a call processing block of an electronic switching system to which the present invention is applied, and among the service functions provided by the exchange until the subscriber picks up the telephone, calls the telephone number of the desired counterpart, and hangs up the telephone. Represents the major blocks related to control. In the electronic switching center, a circuit call is composed of two call control function blocks, and each call control function block generates one process for each call to configure an incoming process and an originating process.

An Analog Subscriber Control (ASC) block mounted in the originating processor 22 controls call processing of an analog subscriber, and a Digital Subscriber Control (DCC) block controls call processing of an Integrated Services Digital Network (ISDN) subscriber.

The TKC (Trunk Control) and TI (Trunk Interface) blocks mounted on the incoming and outgoing processors 22 and 23 perform relay call processing using R2 and Decadic signaling, and telephony user part control (TPC). , TPI (Telephony User Part Interface) block performs relay call processing using TPU (Telephony User Part) signaling method, UPC (ISDN User Part Control), UPI (ISDN User Part Interface) block Relay call processing using the ISUP signaling method is performed.

The NTR (Number Translation) block mounted in the number translation processor 21 performs a function of analyzing a received subscriber's number, and the RCO block manages the state of a route and a line.

In general, when an originated call goes to another station, call processing is performed by an originating call processing process of an ASC / DCC originating call process for outgoing subscriber processing and a relay call block (TKC, TPC, UPC) that processes a call to another station.

In addition, the call received from another station is processed by the incoming call processing process of the block (TKC, TPC, UPC) and the called subscriber processing process of the ASC / DCC.

3 is a process flow diagram according to the present invention, which shows a procedure for auditing a circuit state in a relay call processing block.

In the relay call processing block (TKC, TPC, UPC), the audit procedure for the relay line used for the corresponding signaling method is repeated every 1 hour to prevent the relay line mismatch in the system so that the line can be efficiently used. .

When the system is started in the idle state (31) at the request of CROS (32), an initial timer for the relay line audit is started in the main process of the relay call processing block (33). At this time, the cycle of the timer is 1 hour, and the state of the process after the audit timer is driven transitions to the audit timer end reception waiting state (34).

When the audit timer is expired from the CROS (35), the CROS is queried (36) to determine whether the child process exists for the relay line (37).

When querying the existence of a child process with CROS, Id (Identifier) information of the child process is required, so each time a child processor for relay call processing is created in a block for relay call processing It constructs and manages database (DB) which contains Id information of child processor per line.

If there is a child processor for the relay, check if all the relays in the system are audited (41). If the audit procedure for all relays is not performed, the CROS In the case of repeating the process of inquiring about existence (36) and performing the audit procedure for all relay lines, after restarting the audit timer (42), the audit timer end reception waiting process (34) is performed. Repeat from now on.

If no child process exists for the trunk line, perform a state check for the trunk line that is auditing (38) to determine if the relay line state is Idle (39) If it is determined that a state mismatch occurs, the relay line status information is changed to Idle (40), and then the audit is performed for all the relay lines in the system (41). If not performed, repeat the process (36) of inquiring the existence of the child process for the relay line with the CROS. If the audit procedure is performed for all the relay lines, the audit timer is restarted. After (41) it repeats from the audit timer end reception waiting process 34.

If the relay line status is idle, that is, if the relay line status is normally managed, it is checked whether all the relay lines in the system have been audited (41). If the audit procedure for all the relay lines is not performed, the CROS is connected to the relay line. In the case of repeating the process of inquiring the existence of the subordinate process (36) and performing the audit procedure for all the relay lines, after restarting the audit timer (41), the audit timer is waiting to be received. Repeated from step 34.

In the main process of the relay call processing block, the relay line can be efficiently used by repeatedly performing the audit function for the relay line as described above.

In another embodiment of the present invention, the audit of the subscriber line may be performed in the same manner as the relay audit.

The present invention as described above, by periodically auditing the relay line / subscriber line state by solving the inconsistency of the relay line / subscriber line state that may occur when providing the relay call / subscriber call due to long-term system operation Not only can the management be efficient, but the call success rate can also be increased.

Claims (4)

Implement a database of ID information of the child process, the originating processor 22 that processes the relay call and the subscriber call, and a database of ID information of the child process. In the method, which is applied to a system having an incoming processor 23 for processing a relay call and a subscriber call and a number translation processor 21 for translating a called number and managing route and line status, When the system starts up, it starts the initial audit timer for the trunk line audit, then transitions to listening for the audit timer shutdown and then receives a child process for the relay line when it receives that the audit timer has expired. The first step (31 to 36) to determine whether the child process exists by querying the existence of the, after the first step (31 to 36), the child (child) to the relay line If a process exists, it checks whether all the relay lines in the system have been audited. If no audit procedure is performed for all the relay lines, it is determined whether there is a child process for the relay lines of the first steps 31 to 36. In the case of repeating the inquiry process and performing the audit procedure for all the trunk lines, the audit timer is restarted after waiting for the audit timer end reception process of the first steps 31 to 36 after restarting the audit timer. After performing the second steps 41 and 42 and the first steps 31 to 36, if there is no child process for the relay line, the relay line is inspected by checking the state of the relay line that is performing audit. If the state is idle, the second steps 41 and 42 are performed. If the relay line state is not the idle state, the relay line state information is changed to the idle state Idle. And a third step (38, 39, 40) of performing a second step (41, 42). The auditing method of claim 1, wherein the audit timer is performed with a cycle of 1 hour. An outgoing processor 22 that implements a database of ID information of the child process, processes a relay call and a subscriber call, and implements a database of ID information of the child process, and an incoming processor that processes the relay call and the subscriber call. (23) and a number translation processor (21) for translating called numbers and managing route and line conditions, wherein the initial timer for subscriber line audits is provided when the system is started in idle state. After turning on the audit timer termination after waiting for the startup, after receiving the audit timer has expired, it is determined whether the child process exists by querying the existence of the child process for the subscriber line. A fourth step of determining whether there is a child process for a subscriber line after performing the fourth step; After the fourth step, if there is a child process for the subscriber line, it is checked whether all the subscriber lines in the system have been audited, and if the audit procedure for all subscriber lines is not performed, the fourth step is performed. The fourth step after restarting the audit timer when the audit procedure is performed for all subscriber lines after repeating the process of inquiring whether there is a child process for the subscriber line of the step. If the child process for the subscriber line does not exist after performing the fifth step and the fourth step of repeating the audit timer termination reception process of the subscriber line, the state of the subscriber line performing the audit is examined. If the subscriber line state is idle, the fifth step is performed. If the subscriber line state is not idle, Thanks methods for removing mismatch of the subscriber line in the on state, change the line status to an idle state (Idle), and then around the electronic switch, characterized in that it comprises a sixth step of performing the fifth step. 3. The audit method according to claim 2, wherein the audit timer is performed with a period of 1 hour.