KR950013172B1 - Inter-processor communication method among communication path control processors of full electronic exchanger - Google Patents

Abstract

controlling a speech path connection process by means of speech path control processors in order to construct speech path between connection network subsystems; switching the speech path by means of the speech path control processors so as to release the speech path; and releasing the speech path by means of the speech path control processors in order to release the speech path in the construction of the speech path.

Description

Interworking between communication path control processors (IPC) of electronic switchboards

1 is a process diagram showing the interworking process between the conventional channel control processor.

2 is a procedure showing an interworking process between the channel control processor of the present invention.

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

4 is a flow chart showing the process of performing the present invention.

5 is a flowchart illustrating an interworking process between channel control processors for accessing a channel.

6 is a flowchart illustrating an interworking process between channel control processors for disconnection after completion of a channel connection.

7 is a flowchart illustrating an interworking process between channel control processors for releasing prior to completion of a channel connection.

* Explanation of symbols for main parts of the drawings

10: subscriber exchange subsystem (ASS-1) 20: subscriber exchange subsystem (ASS-2)

30: network subsystem (INS)

The present invention relates to an interworking communication (IPS) interworking method between a centralized switch control processor and a channel control processor when controlling a channel in an electronic switch having a distributed control structure.

All-electronic exchanges are evolving into distributed control structures that distribute functions and loads in order to secure reliability and stability as they become larger and larger in capacity. The distributed control structure is divided hierarchically into centralized, distributed, high-level, sub-processors, etc., and they are composed of a plurality of processors functionally divided into subscriber device control, relay line device control, time switch control, and space switch control processor. It is.

This distributed control structure has the biggest advantage of easy capacity expansion and high stability, whereas structurally requires IPC (Inter-Processor Communication) between processors, and the excessive number of communication affects system performance. Particularly, in the exchanges in which the communication path is in the form of a time switch space switch-time switch, the number of communication of the centralized processor that controls the space switch when controlling the communication path is a factor that determines the exchange performance.

In the conventional distributed control architecture, interprocessor communication for controlling the channel is focused on processing sequence matching, so that the lower processor communicates with the corresponding upper processor, and the upper processor does not communicate directly with other upper processors, and the upper processor does not communicate with all upper processors. Because it is structured to communicate with, the upper processor which centralized control can be easily overloaded because the number of IPC communication is excessive. In addition, excessive IPC communication is likely to cause IPC loss, which in turn may reduce the reliability of the exchange.

1 is a process diagram illustrating an interworking process between call path control processors according to a conventional method, and illustrates IPC interworking between call path control processors for processing a call, and the network connection processor INP is a space switch processor (SSP) or When communicating with the subscriber switching access processor (ASP), each time confirmation and subsequent processing are performed. The number of IPCs transmitted by the INP per call and the number of IPCs received are five, requiring a total of nine IPC communications.

Accordingly, an object of the present invention is to solve the problems of the prior art, it is possible to significantly increase the performance by lowering the number of IPC communication of the centralized switch control processor when controlling the call of the switchboard having a distributed control structure It is to provide an IPC interworking method between channel control processors that can immediately recognize and deal with the inconsistency of the processing sequence due to the IPC loss.

In order to achieve the above object, the present invention provides a network subsystem (INS) with a built-in space switch (SSW) and a plurality of exchange subsystems (ASS) connected with the network system with a built-in time switch (TSW). In the inter-path control inter-processor communication (IPC) interworking method applied to a distributed control electronic switching system having a configured call path system and controlling a call path, call path control processors connect to a call to form a call path between two subsystems. A first step of controlling the process; a second step of the channel control processors controlling the call cutting process to release the configured channel; and a circuit control processor to release the channel during the channel configuration. The third step is to control.

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

3 is a schematic diagram of a control system and a call system of a distributed control switching system, which is hardware to which the present invention is applied. In FIG. 10, a subscriber switching subsystem ASS-1 and 20 a subscriber switching subsystem ASS. (2) and (30) represent subsystems per connection (INS), respectively.

As shown, the electronic switching system to which the present invention is applied is composed of two kinds of sub-systems of the network sub-system 30 and the plurality of subscriber-swap subsystems 10 and 20, and the subscriber-swap subsystems 10 and 20. ) Is a structure capable of expanding the number according to the subscriber or the trunk line acceptance plan to perform the call processing function of the distributed accommodating subscriber, and the network subsystem 30 performs the centralized control function of the call.

T (time switch) -S (space switch) -T where subscriber switching subsystem 10, 20 controls time switch (TSW) and network subsystem 30 controls space switch (SSW). It has a (time switch) structure. The control system includes ASP, a distributed processor that controls the channel as an upper processor, and INP, which is a centralized processor, and a time switch processor (TSP), which is a distributed processor that controls a channel, as a lower processor, and a space switch processor (SSP), which is a centralized processor. IPC communication is performed according to hierarchical structure, but it performs call channel control function while communicating with ASP and SSP with IPC communication path.

The overall operation of the present invention performs the IPC interworking procedure for connection and disconnection between calls between two switching subsystems as shown in FIG.

First, ASPa, which performs outgoing processing, requests channel assignment and space switch connection to INP by INP, and INP allocates a channel and then requests a SP switch connection to SSPa. The SSPa connects the calling party's space location and requests SSPb to connect to the called party's space switch, and the SSPb notifies the ASPa after connecting the space switch to the ASPa.

ASPa requests the time switch to TSPa and passes the channel information to ASPb so that TSPb connects the time switch. After completing the call connection, release the call in the order of ASPa / b SSPa SSPb INP. In this way, when processing a call, INP, which is a centralized processor, processes only three IPCs, thereby reducing the IPC processing time, thereby improving performance, and increasing reliability by monitoring each other's IPC loss. Can be.

4 is an overall flowchart of the present invention.

Looking at the overall process, the step (41) to control the call routing process by the channel control processors to configure the call path between the two subsystems, the channel control processor controls the call cutting process to release the configured channel In step 42, the channel control processors control the channel release processing to release the channel during the course of the channel.

Hereinafter, the configuration of each step will be described in detail with reference to FIGS. 5, 6, and 7.

5 is a detailed flowchart illustrating an IPC interworking process 41 of channel control processors for configuring a channel between two subsystems.

When the ASPa controlling the outgoing call is in the call path configuration step, the channel assignment and the space switch connection request IPC are sent to the INP and the call is sent to the INP, and the SSPb waits for the connection result (51). The INP receives the connection request IPC and allocates the channel between the caller and the caller, and includes the address of the SSPb controlling the caller space switch, the address of the ASPa to receive the connection result, and the caller / receiver channel information (52). . SSPa sends IPC from INP, SSPb sends the IPC to connect the destination space switch to SSPb after connecting the switch. SSPb connects the switch and includes channel information and SSPa / b address information to ASPa. Send IPC to notify the completion of assignment and connection of the space switch (53, 54)

In this way, the ASPa receives the channel information through the call and delivers the channel information to the ASPb that controls the incoming call, and then connects the time switch through TSPa, and also connects the time switch through the TSPb. Space switch Configure time switch calls.

In this process, the centralized control processor INP is able to connect to the call by IPC processing twice (one transmission and one reception), thereby minimizing the load required for IPC processing. In addition, all processors involved in the channel control relay IPCs to their final destinations, thus simplifying the monitoring of IPC loss and minimizing the ripple effect of processing sequence mismatch due to IPC loss.

6 is a detailed flowchart illustrating the IPC interworking process of the channel control processors to release the configured channel. When the ASPa controlling the outgoing call reaches the step of releasing the call, the incoming time switch is cut through the TSPa and the SSPa is informed of the channel information to the SSPa to release the configured call path. Ask the ASPb controlling the to cut the called party time switch (61, 62)

Upon receiving the disconnect request from the ASPa, the SSPa disconnects the calling party space switch and requests the SSPb to disconnect the called party space switch (63). The SSPb notifies the INP that the space switch has been disconnected after disconnecting the channel, and when the IPC is issued from the SSPb, the INP releases the state of the channel and makes it available (64). In this process, the centralized control processor INP can release the call with one IPC processing to minimize the load required for IPC processing.

7 is a detailed flowchart illustrating the IPC interworking process of the channel control processors to release the channel during the construction of the channel.

When the ASPa controlling the originating call reaches the step of releasing the call after receiving the connection request before receiving the completion notification from the SSPb, the ASPa sends the channel release and space switch disconnection request IPC to the INP (71). Since the INP has already sent the connection request IPC to the SSPa, the SSP requests the space switch to be disconnected from the SSPa, and the SSPa receives the disconnect request from the INP. , 73). The SSPb notifies the INP that the space switch has been disconnected after cutting the corresponding channel, and the INP releases the state of the corresponding channel at this time to make it available (74). This IPC linkage is performed by the centralized control processor INP, which is the space of the SSP. By monitoring the switch disconnection, the channel data of the processor and the state of the switch device are thoroughly managed.

Accordingly, the present invention, which operates by the above-described processing procedure, forms a form of relaying IPCs to final destinations in the form of relaying all processors involved in the channel control when controlling the channel in an electronic switch having a distributed control structure. It is simple to manage the channel information and the state of the switch device by the processor call. In addition, since the number of IPC communication of the centralized switch control processor is minimized, the IPC processing load is reduced, and there is an application effect that can greatly improve call processing performance.

Claims (4)

It has a call route system composed of a network subsystem (INS) with a built-in space switch (SSW) and a plurality of exchange subsystems (ASS) with a time switch (TSW) connected to the network subsystem (INS). In the inter-processor communication (hereinafter referred to as IPC) interworking method applied to the distributed control all electronic switch that controls the path, the channel control processor to handle the connection to the call to configure the call path between the connection network subsystem (INS) A first step (41) of controlling; a second step (42) of the channel control processors controlling the channel cutting processing to release the configured channel after the first step (41) is performed; After the step 42 is performed, the call path control processors are provided with a third step 43 for controlling the call release process in order to release the call path during the call path configuration. Seen (IPC) interworking method. The method of claim 1, wherein the first step 41, the network processor (hereinafter referred to as INP) receives a connection request IPC, allocates a channel between an incoming and outgoing call, and controls a caller-side space switch. Sending an IPC location connection request IPC (hereinafter referred to as SSPa), and after performing the above steps, the SSPa receives the IPC from the INP, connects the calling side space switch, and then sends it to the second space switch processor (hereinafter referred to as SSPb). When the IPS is sent to connect the destination space switch, the SSPb sends the IPC including channel information and SSPa / b address information to the first switched access processor (hereinafter referred to as ASPa) after connecting the corresponding switch. And notifying that the connection is completed. 2. The method of claim 1, wherein the second step 41 requests the SSPa to cut the space switch while notifying the channel information, and then the SSPa cuts the originating space switch and then requests the SSPb to cut the destination space switch. And after performing the step, the SSPb notifies the INP that the space switch has been disconnected after cutting the corresponding channel, and the INP receiving the IPC from the SSPb releases the state of the corresponding channel and makes it available. IPC interworking method between call path control processors. The method of claim 3, wherein the third step (43), INP is a space switch cutting request to the SSPa, SSPA received the cut request from the INP to cut the space switch after the incoming call to the SSPb to cut the space switch Requesting, and after the step is performed, the SSPb notifies the INP that the space switch has been disconnected after cutting the corresponding channel, and the INP releases the state of the corresponding channel to make it available. IPC interworking method between control processors.