KR950011482B1 - The method managing an isdn line of communication for the electronic exchanger - Google Patents

Abstract

if breaking request of a specific circuit is received from an operator, transmitting/receiving a circuit breaking message; if a circuit break releasing message is received from a TDMH, transmitting/receiving a circuit break releasing message; if a restoration completing message is not received from an extra-office, transmitting a circuit restoring message to the corresponding circuit; if the circuit restoring message is received, processing the message; if a large number of circuits or all circuits receive much influence due to memory damage, transmitting the circuit restoring message; if the circuit is in intra-office hardware cutting state, transmitting the circuit cut message from the TDMH to the extra-office; and performing a process of an IAM message receiving part for the intra/extra-offices.

Description

How to manage inter-station call line of ISDN user part in electronic switching center

1 is a structural diagram of an electron exchanger to which the present invention is applied.

Figure 2 is a block diagram according to the configuration and message flow between blocks for implementing the present invention.

3 is a flowchart of an inter-station call line management process of a user unit of No. 7 signaling system according to the present invention.

The present invention relates to a method for implementing various circuit management methods in a No. 7 ISDN user unit in an electronic switchgear which is a distributed control system.

In order to provide better service quality and continuous service in the operation of the exchange, maintenance of the call line between exchanges takes place according to the needs of the operator and the internal situation of the system. In addition, unlike the existing signal system, as the No. 7 signal system is provided, various functions can be realized. The maintenance and repair of such a circuit affects call processing, so it is inevitable to interwork with the ISDN user part that is in charge of actual call processing.

With the development of communication technology, a new concept of Integrated Services Digital Network (ISDN) has emerged. Various services for ISDN users have been defined, and No.7 signaling has been introduced as a signaling method between nodes in the network to build an ISDN network. Until now, in Korea, we have used R2 signaling method that uses voice information and line monitoring signal sharing the same channel as exchange period protocol for voice information exchange, but it can provide various services for ISDN users due to the small number of defined signals. It is gone. Therefore, in order to establish an ISDN network in Korea and provide various services to ISDN users, the introduction of No. 7 signaling has become inevitable. In addition, various maintenance / maintenance functions for circuits are provided in No. 7 signaling schemes compared to existing signaling schemes, and thus, a method of managing a circuit in an ISDN user unit that processes ISDN signals for these changed functions is required.

Accordingly, an object of the present invention is to provide a communication line management method between stations in a No. 7 signaling user unit in an electronic switchboard.

In order to achieve the above object, the present invention provides an ISDN user part (ISUP) consisting of an ISDN user part control block (UPC) and an ISDN user part matching block, and a telephony device maintenance handling (TDMH). No.7 In the various line management methods of the ISDN user unit, a first step of performing a circuit (group) blocking message transmission / reception process when receiving a blocking request of a specific line (group) from an operator; and a line (group) from the TDMH. In response to the transmission of the recovery message during the call processing process, the second step of performing transmission / reception of the line (group) disconnection message is received and the recovery completion message has not been received from the power supply for a predetermined time. In the case of the third step of transmitting a playback message for the corresponding line, and if the rotation playback message is received through the UPI from the power station, a destination for the rotation playback message is received. A fourth step of performing and terminating the message; a fifth step of performing transmission processing for the circuit group reproduction message when a large number of circuits and all of the circuits are affected by memory corruption; and a circuit group reproduction from a large station. A sixth step of processing transmission of the circuit group blocking message from the TDMH to the station when the line state is the H / W blocking state upon receiving the request; and upon receiving an IAM message for the own / other station blocking line. A seventh step of carrying out the process is carried out.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a schematic control structure diagram of an all-electronic exchanger which is a distributed control system.

The electronic switching system consists of three subsystems: Access Switching Subsystem (ASS), Inter Connection Network Subsystem (INS), and Central Control Subsystem (CCS).

ASS is classified into ASS_S (Subscriber), ASS_T (Trunk) and ASS_7 (No.7 Signaling System) according to the function.In ASS_S, the ASP (Acess Switching Processor) handles the call processing function for subscribers accommodated in the exchange, and ASS_T The ASP and ASS_7 feature national circuit call processing functions such as the No.7 signaling message transfer part (MTP) and the signaling connection control part (SCCP), and the ASPHP SMHP (Signaling Message Handling Processor). To perform.

In INS, Number Translation Processor (NTP) and Interconnection Network Processor (INP) perform the number translation function, route control function, and space division switch control function, which are commonly required in each ASS. The function is performed.

Each subsystem is connected to the INS via LDL (Local Data Link) to form an interprocessor internal network.

2 is a structural diagram showing the flow and configuration of messages between related blocks for implementing the inter-office call line management function of the No.7 signaling user part of the TDX-10 electronic switching system.

UPC (ISDN-User Part Control), UPI (ISDN), two software blocks that have a shared function for handling ISUP relay calls in ASS-T's Access Switching Processor (APS) to handle relay calls for ISUP services. User Part Interface).

The UPC block performs incoming / outgoing relay on the generated ISUP call, and controls and transmits various messages generated during the call processing to the UPI. UPI performs message conversion function and transmits information to the power through MTP (Message Transfer Part). The Telephonyn Device Maintenance Handling (TDMH) block is a block that exists in each ASP in the system to manage the maintenance status of the call line equipment. Receives the test results of the on-line call system equipment internally to block / unblock the related equipment or to isolate or restore specific call system equipment according to the operator's request It transmits the status of the equipment to the operator.

Unlike the existing signaling method, the processing of this function should be able to transmit information to the power station through the signal network. Therefore, the interworking with the UPI block is made and the UPC block that processes the call because the state of the line also affects the ISUP call processing. You also need to work with. The types of ISUP inter-call line control management are as follows.

1. Line (group) blocking message transmission and reception processing

Upon receiving a request for blocking a particular line (group) from the operator, the TDMH sends the information to the UPI to inform the large country, and the UPI sends the information to the large country. TDMH also notifies the UPC in charge of the ISDN relay call that its country is blocked. The notified UPC determines the handling of the call by checking the progress of the call on the line and the contents are shown in Table 1 below.

As a response message to the circuit block, a circuit block acknowledgment message is received from the power station. In addition, when receiving a line (group) blocking message from the power station, the UPI transmits the information to the TDMH, and the TDMH notifies the UPC of the line blocking state of the country, and in response, sends a line (group) confirmation message to the country. Send. Upon receiving the notification, the UPCH determines the call processing by checking the progress of the call on the line, as shown in Table 1 below.

Blocking of individual circuits may be made at the request of the operator, and blocking of a circuit group may occur on-line due to the operator's request and H / W cause. In the case of blocking a circuit group, the CCITT recommends that the maximum number of lines blocked by one circuit group blocking message is 32. However, in TDX-10, the distributed system, the maximum is 24 lines in T1 and the maximum in E1. Control up to 32 lines.

TABLE 1

2. Process Sending / Receiving Line Unblocking Message

Since the circuit (group) disconnection release message does not affect ISUP call processing, it transmits and receives to the power station through UPI without notifying UPC, which is a call processing block. In addition, the line (group) disconnection release message is transmitted and received in response to the line (group) disconnection release message. In this case, the state of the line is changed to the idle state. In the UPC, when a call is generated for a corresponding line, the state of the line is examined at the call setup stage, and the call proceeds if the state of the line is idle. In the case of blocking for a circuit group, the CCITT Recommendation limits the maximum number of circuits to be unblocked by one circuit group unblocking message to 32. However, the distributed system controls up to 24 lines for T1 and up to 32 lines for E1 in the electronic switchboard.

3. Line replay message sending processing

If the recovery completion message has not been received from the power station in response to the transmission of the Nordic message during the call processing, a playback message for the corresponding line is sent. A line replay message is sent to the station and a recovery completion message is received in response. Upon receiving the completion message, the TDMH examines the status of the circuit and notifies the station back to the other party about the circuit of its own block.

4. Receive Line Replay Message Processing

When the circuit replay message is received from the power station through the UPI, the UPC notifies the power station of the recovery completion message if the call is in the oil state, and notifies the power station if the ISUP incoming call is being performed. In addition, in the outgoing call setup step, another relay line is retried, and the UPC transmits a rotation regeneration notification to the TDMH. TDMH forwards the request for blocking on the line back to the station if the line is in its own blocking state.

5. Line group replay message transmission processing

Circuit group regeneration messages are generated when trying to regenerate a circuit group at the system level, such as when a large number of circuits or all of the circuits are affected by memory corruption. The number of lines reproduced by one line group reproduction message is limited to 32 at maximum. If it is determined that transmission of the circuit group reproduction message is necessary, the TDMH transmits the circuit group reproduction message to the power station through the UPI, and notifies the circuit group reproduction to the UPC block. In the UPC block, the progress state of the call of each line included in the line group is examined, and the line in the outgoing call setup step is retried, and the call is terminated for the call in other states. In addition, when the other station is in the H / W blocking state, the other station is notified of the circuit group blocking message and receives the circuit group regeneration confirmation message in response to the transmission of the circuit group regeneration message.

6. Receive line group replay message processing

Upon receiving a circuit group regeneration request from a large station, the TDMH sends a circuit group blocking message to the large station when the line state is its own H / W blocking state, and sends a circuit group regeneration confirmation message in response to the circuit group regeneration message. Notify the UPC of the circuit group regeneration. In the UPC, the call processing status is checked for each line included in the range of the line group, and if a call is being set, the call is retried to another relay line and the call in the other state is terminated.

7. Process when receiving IAM message for own / other station interception line

When the IAM message is received from the large station, the UPC block examines the state of the circuit. If the local station blocks, the UPC block ignores the IAM message and notifies the TDMH block of the blocking error. In the TDMH block, the circuit block message for the line is sent back to the station. In case of blocking other station, IAM message is processed normally and notification of unblocking is sent to TDMH. In this case, the blocking status for other stations is released.

3 is an overall flowchart of a method for managing inter-call calling lines of a No. 7 signaling user part of an electronic switching system according to the present invention.

3A is a flowchart of a procedure of transmitting / receiving a line (group) blocking message.

If a system block message is sent to a large station due to the internal situation of the system, the TDMH requests to transmit a block message to the UPI block, and the block group notification is sent to the UPC block (1). The UPC receiving the circuit blocking notification examines the progress of the call and performs a call processing status check as shown in Table 1 above. (2) The UPI configures a message type to block the message. (3).

(4) Upon receiving the line (group) block acknowledgment message in response to the line (group) block message from the power station, the device transmits the line (group) block acknowledgment message to the TDMH. (5)

When the circuit block message is received from the power station (6), the circuit block message is transmitted to the TDMH (7). Upon receiving the line (group) block acknowledgment message from the TDMH (8) the UPI block sends a line (group) block acknowledgment message back to the power station (9) and the UPC determines the call progress status as shown in Table 1 above. Process (10).

3B is a flowchart illustrating transmission and reception of circuit (group) blocking messages.

Sending / receiving of a line (group) disconnection message is interworked with a power station through UPI without interworking with the UPC. Upon receiving the line (group) disconnection message from the TDMH (11), the UPI configures a message form (12) and transmits a line (group) disconnection release message to the power station (13). A line (group) disconnection release confirmation message is received as a response message from the power station (14) and transmitted to the TDMH (15).

Receiving a line (group) unblocking message from the power station (16) forwards to the TDMH (17), and receives a line (group) unblocking acknowledgment message from the TDMH (18) to configure the message type in the UPI (19) In step 20, a line (group) unblocking confirmation message is transmitted to the power station.

3c is a flowchart illustrating processing of receiving a circuit playback message.

Receiving a line regeneration message from a large station (21), the UPI notifies the UPC of the line regeneration for the corresponding line, and processes the call according to the progress of the call in the UPC (22). If the call is idle, the UPC main process sends a recovery completion message to the power station (23). If the call is being set up, it retries to another relay line (24). For a call state other than outgoing call establishment, the UPC child process sends a recovery completion message to the power station (25). Further, the TDMH is notified of the line regeneration (26), and when the state of the line is self-blocking, the TDMH receives a request for sending a block message from the TDMH (28). The UPI constructs a message type for the blocking message (29) and transmits the blocking message to the power (30).

3D is a flowchart of processing according to the transmission of a line reproduction message.

When the system internally transmits a recovery message during call processing and does not receive a recovery completion message within a predetermined time in response, a line regeneration message occurs (31). The UPI transmits a line replay message to the power station (32) and receives a recovery complete message as the response message (33). The TDMH is notified of the regeneration of the corresponding line (34), and the state of the line is examined to complete the execution (35). Investigate the blocking status (36) In case of self-blocking, receive the request to send a blocking message to TDMH (37), configure the message type (38) and transmit the blocking message to the large country (39.) It receives the message (40) and forwards the blocking message to the TDMH (41).

3E is a processing flowchart according to the transmission of a circuit group reproduction message.

When data between two systems is matched, a request is made to send a circuit group replay message from the TDMH to the power station (42). Each of the circuits included in the circuit group is examined for the path to the lake (43). Investigate whether the call progress is in the outgoing call setup (44), if the outgoing call setup is in progress, retry with another relay line (45), and otherwise process as shown in Table 1 (46). In addition, the system checks whether the other station hardware (H / W) is blocked (47). If the other station is in the H / W blocked state, it receives a line group blocking message from the large station (48) and receives a line group regeneration confirmation message (49). . The circuit group disconnection message and the circuit group reproduction confirmation message are transmitted to the TDMH (51). When the other station is not in the H / W blocking state, the mobile station receives the circuit group playback confirmation message (52) and transmits the circuit group playback confirmation message to the TDMH (53).

3F is a flowchart of processing according to the reception of a circuit group reproduction message.

When the circuit group reproduction message is received from the power station (54), the circuit group reproduction message is transmitted to the TDMH (55). The UPC examines the performance state of the call (56) and checks whether the call progress state is setting up the outgoing call (57). If an outgoing call is being established, another call is retried (58) and the call is terminated for other conditions (59). In addition, it checks whether the local station H / W is blocked (60), and receives a line group blocking message transmission request from the TDMH when the local station H / W is blocked (61). A message form is constructed (62) and a circuit group blocking message is sent to the power station (63). When the TDMH receives the request for sending the circuit group reproduction confirmation message (64), it forms a message form (65) and sends the circuit group reproduction message to the power station (66).

3G is a flowchart of processing of receiving an IAM message for a local / other station interception circuit.

Upon receipt of an IAM message (67) to establish a call to the station, the interception state is examined (68). If the blocking status is the self blocking, the processing for the received IAM message is ignored (69) and the TDMH is notified of the blocking error notification (70). Upon receiving a request for sending a circuit cut message from the TDMH (71), a message type is formed (72) and a circuit cut message is sent to the power station (73). If the other station is blocked, the received IAM message is processed normally to proceed with the call (74) and the TDMH is notified of the release of the block (75). If the self / other country is blocked at the same time, it informs the TDMH of the unblocking of the other station (76) and the blocking error notification of the self blocking. When receiving a circuit block message transmission request from the TDMH (78), a message type is configured (79) and the circuit group block message is sent to the large station (80).

Therefore, the present invention performed by the above processing procedure has the effect of appropriately coping with continuous service and resource utilization in ISUP relay call processing by separately managing call lines between stations with respect to the state of the line changing according to the system situation. have.

Claims (6)

Various circuits at No.7 ISDN user part in all electronic switchboard including ISDN user part (ISUP) composed of ISDN user part control block (UPC) and ISDN user part matching block and Telephony Device Maintenance Handling (TDMH) In the management method, a first step (1 to 10) of performing a line (group) blocking message transmission / reception process when receiving a blocking request of a specific line (group) from an operator, and receiving a line (group) disconnection release message from the TDMH. Second step (11 to 20) to perform transmission / reception processing for line (group) disconnection release message, and in response to transmission of recovery message during call processing, a recovery completion message has not been received from the large station for a certain period of time. In this case, the third step (21 to 30) of transmitting the reproduction message for the corresponding line, and if the line reproduction message is received through the UPI from the power station, the reception processing for the line reproduction message can be performed. And the fourth steps 31 to 41 for terminating, and the fifth steps 42 to 53 for performing transmission processing for the circuit group reproduction message when a large number of lines and all of the lines are affected by memory corruption; A sixth step (54 to 66) for processing the transmission of a circuit group cutoff message from the TDMH to the mobile station when the line state is in the state of its own hardware (H / W) cutoff when receiving a circuit group regeneration request from a large station; And a seventh step (67 to 80) for performing processing according to the IAM message receiver for the other station blocked line. The method of claim 1, wherein the first step (1 to 10), if the system (circle) block message is sent to the country due to the internal situation of the system, the TDMH request to transmit the line (group) block message to the UPI block. Step (1) of notifying the circuit group blocking to the UPC block, and the UPC receiving the circuit (group) blocking notification examines the progress of the call and performs a call processing status check, and the UPI forms a message form. (2 to 3) of notifying a line (group) blocking message, and receiving a line (group) blocking confirmation message in response to the line (group) blocking message from the power station. Forwarding the line (group) blocking message to the TDMH upon receiving the line (group) blocking message from the power station; and receiving the line (group) blocking acknowledgment message from the TDMH. Line (group) blocking Transmitting a message and UPC is carried out by processing the call by grasping the progress of the call (8 to 10) characterized in that the inter-station call line management method in the ISDN user portion. 2. The method of claim 1, wherein the second steps 11 to 20, when receiving a line (group) release message from the TDMH, constructs a message form in the UPI and transmits a line (group) release release message to a large station. (11 to 13), receiving the line (group) unblocking acknowledgment message from the power station (14, 15) and transmitting the line (group) unblocking acknowledgment message from the power station to the TDMH And, when receiving a line (group) block release confirmation message from the TDMH comprising the step (16 to 20) of configuring a message form in the UPI to transmit the line (group) block release confirmation message to the power station An inter-station call line management method in an ISDN user unit. The third step (21 to 30), the UPI receiving the line playback message from the power station notifies the UPC about the line playback for the line, the UPC processes the call according to the progress of the call Step (21, 22), and if the call is idle, the UPC main process delivers a recovery completion message to the power station.If the call is being set up, it retries to another relay line. (child) Process (23 to 25) to send recovery completion message to the power station, and if the state of the line is notified to the TDMH, and if the state of the line is self-blocking, a request for sending a block message is sent from the TDMH to the power and the UPI is blocked. Comprising a message form for the message and transmitting the block message to the power station (26 to 30), characterized in that performed between the stations in the ISDN user portion How to manage call lines. The method as claimed in claim 1, wherein the fourth steps 31 to 41 include, when a case of transmitting a line play message occurs, transmitting a line play message from a UPI to a power station and receiving a recovery complete message as a response message ( 31 to 33), notifying the TDMH of regeneration of the line, and checking the state of the line to finish the operation (34, 35) if not in the blocked state; ISDN user characterized in that the message form is configured to send a blocking message to the large station and if the blocking of the other station, receiving the blocking message from the large station and delivering the blocking message to the TDMH (36 to 41) A method of managing interstation call lines in departments. 5. The method of claim 1, wherein the fifth step (42 to 53), when a request for sending a circuit group reproduction message is received from a large power station, examines a running state for each circuit included in the circuit group, and the call progress state is determined. Investigate whether outgoing call is being set up, and if outgoing call is being set up, retry with another relay line, and perform other call termination processes (42 to 46), and check whether the other station hardware (H / W) is blocked. Receiving a line group blocking message from a large station and receiving a line group regeneration confirmation message (47 to 49) when the other station is in the H / W blocking state, and transmitting a line group blocking message and a line group regeneration confirmation message to the TDMH. And receiving (50 to 53) a line group regeneration confirmation message to the TDMH by receiving a line group regeneration confirmation message to a large station when the other station is not in the H / W blocking state. Station-to-station communication line management method in the ISDN user part of claim.