KR940007917B1 - Isdn using method - Google Patents

Abstract

The method includes a TDMH block (13) which executes a call control block (12) and a trunk device function, an UPC block (14) whith executes an ISDN user call control function, and an ISDN user message processing function, an ASS-7 (3) which has a signal message processing processor SMHP (8), an ASS-S (1) which executes a call processing function, an ASS-T (2) which executes an interconnecting call processing function, an INS (4) which is an interconnection network subsystems such as ASS systems (1,2,3), and a central control subsystem CCS (5). The method includes a 1st step (21 or 35) which transfers message to a corresponding processor, a 2nd step (41 or 46) which transfers initial data to an input or output transit call processor, a 3th step (51 or 56) which terminates internal protocol message.

Description

How to implement ISDN user part

1 is a control structure diagram of an electronic switching system to which the present invention is applied.

2 is a software functional block diagram of implementing the present invention.

3 is a control flowchart of the main process of the UPC block.

4 is a control flowchart of the main process of the UPC block.

5 is a control flowchart of the incoming and outgoing process of the UPC block.

* Explanation of symbols for main parts of the drawings

1, 2, 3: subscriber exchange subsystems (ASS-S, ASS-T, ASS-7)

4: Network Subsystem (INS) 5: Central Control Subsystem (CCS)

6 Subscriber Switched Processor (ASP) 7 Local Data Connection (LDL)

8: Signal message processing processor (SMHP) 9: Subscriber interface unit (SI)

11: CIN

The present invention relates to a method for implementing a function of an No. 7 signaling integrated information network (ISDN) user unit applied to an all-electronic switching system having a distributed control structure.

Recently, various services for ISDN users have been defined, and No.7 signaling has been introduced as a signaling method among the nodes of the network in order to build a comprehensive information communication network. However, in the past, the R2 signaling method using the same channel for the voice information and the relay line monitoring signal has been used as an exchange period protocol for exchanging voice information. However, since the number of defined signals is small, various services for ISDN users can be provided. It became impossible.

Accordingly, the present invention has been made to solve the problems of the prior art, while minimizing the modification of the ISDN user part specification of the International Telegraph Advisory Council (CCITT) recommendation, while minimizing the modification of the existing software system in the system It is to provide an implementation method of ISDN user part of independent function.

In order to achieve the above object, the present invention provides a processor ASP equipped with a TDMH block serving a call control block and trunk equipment health function, an UPC block serving an ISDN user call control function, and a UPI block serving a message processing function of an ISDN user part. , ASS-7, which is a subscriber exchange subsystem with a signal message processing processor SMHP to be equipped with a No.7 common channel signaling method block and a signal connection controller function block, and a call processing function for a subscriber housed in an exchange. ASS-S, which is the subscriber switching subsystem responsible for the service, ASS-T, which is the subscriber switching subsystem responsible for the relay station call processing function, and ISN, which is a network subsystem connected to the ASS, and the central terminal connected to the INS. In the ISDN user part implementation method applied to the electronic switching system consisting of CCS which is a control subsystem, the UPC block, TDMH block, When an internal protocol message or a user part message is received from the root control block in the INS, it is converted into a user part message form and distributed evenly. The message is transmitted to the related process of the UPC block, the TDMH, and the root control block in the INS through the SMHP. A first step of forwarding, a second step of creating a process according to incoming and outgoing calls upon receiving a message requesting user code control, and delivering initial data to the incoming and outgoing processes, and to the main processor. If the process is generated, perform the initialization process and perform the user part protocol processing, the relay line automatic retry, the outgoing call and the relay call control function according to the reception of the internal protocol message in the call control state, and then the call process. Performed by a third step of destroying or delivering and terminating the internal protocol message It characterized.

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

FIG. 1 is a schematic control structure diagram of an electronic switching system having a distributed control structure. In the drawings, 1, 2, 3 are an Access Switching Subsystem (ASS), and 4 is an Interconnection Network Subsystem (INS). 5 is a Central Control Subsystem (CCS), 6 is a Subscriber Switched Processor (ASP), 7 is a Local Data Connection (LDL), 8 is a Message Message Processor (SMHP), 9 is a Subscriber Interface (SI) ), 10 denotes a trunk interface unit T1, and 11 denotes a connection network CIN.

As shown in the figure, the hardware structure to which the present invention is applied includes the ASS (1, 2, 3) and the ASS (1, 2, 3) in charge of subscriber, exchange, trunk, and No. 7 signal processing. Connected to the INS (4) and the INS (4), which performs the number translation function, the route control function, and the space division switch control function, which are commonly required call processing functions in the ASS (1, 2, 3). Consists of CCS (5) to perform the operation and maintenance function of.

The ASS (1, 2, 3,) is classified as ASS-S (1), ASS-T (2), ASS-7 (3) according to the function and the ASP (6) of the ASS-S (1) is exchanger It handles the call processing function for subscribers accommodated in the network. The ASP 6 of the ASS-T (2) is connected to the SMHP (8), which is a signal message processing processor, through the CIN (11). 7 It performs the functions of the message transfer part (MTP) and the signaling connection control part (SCCP) of the signaling method. Each ASS (1, 2, 3) is connected to the INS (4) via the LDL (7) to form an interprocess system internal communication network.

2 is a block diagram of a software block according to the present invention, in which 12 is a call control block, 13 is a TDMH block, 14 is a UPC block, 15 is a UPI block, 16 is a main process of an UPC block, and 17 is an incoming process. , 18 represents the outgoing process, and 19 represents the main process of the UPI block.

The call control function of the user part is performed in the UPC (ISDN user part control) block 14, and the message processing function of the user part is performed in the UPI (ISDN user part matching) block 15. TDMH (Trunk Equipment Preservation) block 13 performs relay line blocking, release, and right functions, and the message traffic control function for the signal network constructed with the introduction of No. 7 signaling is performed by the route control block () in the INS (4). Not shown). Let's take a look at the detailed functions of the UPC block 14 and the UPI block 15 which perform the core functions of the user unit.

end. Process management function

Whenever a relay call occurs, a related processing process is generated, and a process management function that destroys the related processing process at the end of the relay call has a parallel processing structure.

I. ISUP control function

Receives internal protocol messages from user side messages or neighboring blocks to control user side message signaling procedures, performs continuity checks and automatic retries of related relay lines, and uses the Signal Connection Control Unit (SCCP) for information transfer services between users. Control end-to-end signaling through

All. Call Control Matching Function

Matched with call control blocks, it controls outgoing calls by the user part requested by analog subscribers and digital subscribers accommodated in all electronic switchboards, and incoming calls and transit calls by user part requested by exchanges connected by trunk lines. ) To control the function. And it matches the call control blocks to perform the function of controlling the additional service.

la. Message distribution function

The generated internal protocol message or ISUP message is distributed to a message matching unit (MTP) or a signal connection control unit (SCCP) through a block matching the UPC block or the UPI block 15.

hemp. Relay line management function

The management and maintenance functions of the relay line are performed in conjunction with the TDMH block 13 and the block 13.

bar. Relay line management function

Management and maintenance of the relay line is performed in conjunction with the TDMH block (13).

Next, the UPI block 15 performs the following function.

end. Circuit Identification Code (CIC) Conversion Function

The user unit which transmits and receives the relay line control message to the signal network formed by the introduction of No. 7 signaling method uses the circuit identification code to identify the relevant relay line. The circuit identification code conversion function manages the mutual conversion and related conversion data between the trunk line number operated inside the system (UPC blur) and the CIC used in the user part message.

I. Message conversion function

Inter-conversion function between the user part message defined in the CCITT Recommendation received by the message transmission unit or the signal connection control unit and the internal protocol message of the electronic switching system in the CHILL (CCITT High Level Language) language.

All. Message distribution function

The received internal protocol message is delivered to the SMHP-S 8, and the user part message received from the SMHP 8 is delivered to the process of the block concerned.

la. Message load control

The message transfer and signal connection controller level 3 functionality of the electronic switching system is load sharing by multiple processors. The message load control function distributes the user part message to the message transfer unit and the signal connection control unit so that the load is uniform among the processors.

On the other hand, the UPC block 14 has a parallel processing structure that controls the call by generating a related processing process at every relay call occurrence, and three processors are defined internally, and the functions of each processor are as follows.

end. Main processor (16)

As main process, one is created for each ASP (6) of Bush Steam ASS-T (2) that needs user part function when starting electronic switching system and operates with infinite life time (permanent life time). Create a process.

I. Outgoing Processing Process (17)

It is generated whenever an outgoing call or transit call occurs by the main process, processes the user part protocol, matches the existing call control blocks, and performs outgoing call and relay call control by the user part. It is destroyed after processing outgoing call and relay call from start to finish.

All. Infeed Processing Process (18)

It is generated for every incoming call and transit call by the main process, processes the user part protocol, matches with existing call control blocks, and performs the incoming call and relay call control function by the user part. It disappears after processing incoming call, relay call from start to finish.

On the other hand, the UPI block 15 has a single processing structure and internally, one main process is defined. One main process is created for every ASP (6) of Bush Steam ASS-T (2) that needs user part function when starting the electronic switchgear system and operates with permanent life time.

3 is a control flowchart of the main process 16 of the UPI block 15.

When receiving an internal protocol message or a user part message from the UPC block 14, the TDMH block 13, and the root control block in the INS 4 (21), the message is sent and classified (22). . A message to be transmitted to the message transfer unit (MTP) in the SMHP (8), and converts the internal line number (the relay line number in the message) into a line identification code used in the signal network to form a double sentence portion of the user portion message (23), The internal protocol message is converted into a user part message format (24).

The user part message is then distributed (25) to the message delivery part in the SMHP (8) and distributed (26).

By the way, if the place where the message is to be transmitted is the signal connection control unit in the SMHP- (8), the internal protocol message is converted into a signal connection control unit message form (27), and the message is controlled to be distributed evenly to the signal connection control unit (28). The user part message is transmitted to the signal connection control unit of the SMHP 8 (29) and terminates.

Investigation result 22 where the message is to be sent If the destination to be sent is a root control block in the UPC block 14, the TDMH block 13, and the INS 4, the user part message is converted into an internal protocol message (30). ), The line identification code is converted into an internal line number (31).

The message is sent and classified (32), the UPC block (14), the TDMH block (13), and the message is transmitted to the root control block (RCO) in the INS 4 (33 to 35). do.

4 is a control flowchart of the main process of the UPC block 14.

Upon receiving a message requesting user code control (41), the type of call is checked (42). As a result of the survey 42, upon receiving the internal protocol message requesting outgoing processing from the route control block in the INS 4, the outgoing process is generated (43), and after initial data is sent to the outgoing process (44). Exit. However, upon receipt of an internal protocol message requesting incoming processing from the UPI block 15, an incoming process is created (45), after the initial data is passed to the incoming process (46).

5 is a control flowchart of the incoming and outgoing processing of the UPC block 14.

When a process by the main process is created, it receives initial data from the main processor and checks whether the continuity check is necessary, performs continuity check if necessary, and checks whether there is a request for information transfer service between users from the ISDN user. Perform the signal processing function terminated with the connection controller. In operation 51, the user part message content is configured as initial data or an internal protocol message is transmitted to the UPI block 15 or the call control block 12. Receiving an internal protocol message in call control state (52). Perform relay line automatic retry, user part protocol processing as needed (53), match with existing call control blocks (54), outgoing call, incoming call, transit call by ISDN user part (transit call) ) Perform the control function. After performing the function, it is checked whether the call is terminated (55). If the call is terminated, the process is terminated after termination. If the call is not terminated, the internal protocol message is transmitted and the function is terminated (56).

Accordingly, the present invention performed by the above processing procedure newly defines a software block for performing the user part function when the No.7 signaling ISDN user part function is added to the electronic switching system, thereby processing the message processing function and the call control. By separating and implementing the function, the effect of changing the message part of the user part can be limited to the modification of the message processing function part, so that the modification can be minimized. It is possible to define and operate the matching with the signal connection control unit independently, and to perform all the matching functions for the existing call processing functions in the system to minimize the modification of the existing call processing functions in the system by adding the functions. User part function development becomes possible, and software management and addition of additional function become simple And it is.

Claims (3)

Call control block 12, TDMH block 13 for trunk equipment health function, UPC block 14 for ISDN user code control function, UPI block 15 for message processing function of ISDN user part and processor ASS-7 (3), which is a subscriber exchange subsystem having an ASP (6), a signal message processing processor SMHP (8) to be equipped with a No. 7 common line signaling method function block and a signal connection control function block; And ASS-S (1), which is a subscriber exchange subsystem serving a call processing function for subscribers accommodated at an exchange, ASS-T (2), which is a subscriber switching subsystem serving an inter-office relay line call processing, and ISD user applied to an electronic switching system composed of INS (4), which is a network subsystem connected to ASSs (1, 2, 3), and CCS (5), which is a central control subsystem connected to the INS (4). In a sub-implementation method; When the internal protocol message or the user part message is received from the UPC block 14, the TDMH block 3, and the root control block in the INS 4, it is converted into a user part message form and distributed evenly to the SMHP (8). A first step (21 to 35) for transmitting a message to the associated process of the root control block in the UPC block 14, TDMH 13, and INS (4) through, and a message requesting user code control When receiving the process, the second step (41 to 46) to create a process according to incoming and outgoing and to transfer the initial data to the incoming and outgoing process, and if the process is generated by the main processor, the initialization process In case of call control, after the user part protocol processing, relay line automatic retry, outgoing call and relay call control function are executed, the call process is destroyed or internal The implementation ISDN user part, characterized in that is carried out by the step 3 (51 to 56) for delivering protocol message and exits. The method of claim 1, wherein the first steps (21 to 35) comprise the steps 21 and 22 of examining and classifying where to send a message upon receiving an internal protocol message or a user part message. 22) After the execution, if the transmission destination is in the SMHP 8, converting the internal protocol message into a user part message form, controlling the message to be distributed evenly, and transmitting the user part message in the SMHP 8 (23). To 26), and after the steps 21 and 22 are performed, converting a protocol message into a signal connection control unit message and transmitting a user unit message to the signal connection control unit if the transmission destination is a signal connection control unit in the SMHP 8 ( 27 to 29), and after the steps 21 and 22 are performed, the user part message is converted into an internal protocol message and the line identification code is converted into an internal line number to convert the message into an UPC block 14, a TDMH 13, and an INS. (4) Transfer to the loop control block in Implementation method of the ISDN user unit, characterized in that performed by the step (30 to 35). The signal processing function according to claim 1, wherein the third step (51 to 56) is for performing a continuity check according to a process generation and a request for information transfer service between users. An initialization step (51) for handling user part message delivery, and steps (52, 53) for performing relay line automatic retries and user part protocol processing as necessary when receiving an internal protocol message after performing step 51; After performing the step 52, performing the outgoing call, incoming call, and the relay call control function by the ISDN user unit by matching with existing call control blocks (54), and performing the step (54). After the call is terminated, the process terminates after the process is terminated, and if the call is not terminated, an internal protocol message is transmitted and terminated, which is performed by a step (55, 56).