KR920009207B1 - Control method of inner changing call - Google Patents

Abstract

(A) detecting ISUP relay signal; (B) inspecting the sufficient material; (C) translating input number to discriminate that the subscriber having input number is ISDN subscriber or normal subscriber; (D) processing outgoing request message and replying message of the subscriber; and (E) reconstructing the occupied loop according to the request of the subscriber or a transmitter.

Description

Incoming call control method using common line signaling

1 is a schematic configuration diagram of hardware to which the present invention is applied.

2 is a block diagram schematically showing the configuration of the software according to the present invention.

3 is a flowchart of execution of software for performing an incoming call control (CCI) function according to the present invention.

* Explanation of symbols for the main parts of the drawings

DTLP: Digital Trunk Control Processor TLP: Analog Trunk Control Processor

ISLP: ISDN Subscriber Processor SLP: General Subscriber Processor

SWP: Switch Control Processor NTP: Number Translation Processor

SAP: System Supervisory Processor SMP: System Maintenance Control Processor

1: Incoming call control (CCO) function 2: Incoming call control (CCI) function

3: Outgoing call control (CPCO) function 4: Incoming call control (CPCI) function

5: Signal procedure control (SPRC) function unit 6: Common buffer

7: IPC buffer

The present invention relates to a method for controlling an incoming call located above a user information network (hereinafter referred to as an ISUP) of the No.7 signaling system, which is an international communication protocol recommended by the International Telecommunication Advisory Committee (hereinafter referred to as CCITT). will be.

As the role of information and communication has increased and the demands of users who demand fast and accurate transmissions from various media and simple voice-oriented information communication have increased, the services of the integrated information and communication network have been needed to satisfy these needs. In the call using the R2 signaling system, the various services provided by the integrated telecommunication network cannot be provided to the subscribers of the counterpart system.

In general, incoming call control (CCI) is a function for applying the incoming call control (CPCI) function of ISUP to a specific exchange, which is indispensable for constructing a comprehensive information communication network. The need is increasing.

Accordingly, an object of the present invention is to provide an incoming call control method of a common line signaling method for controlling an incoming call using the ISUP function of No. 7 signaling method. .

In order to achieve the above object, the present invention provides a means (SMP) for the maintenance of the system, a means for informing the operator of the state of the system and input and output the necessary commands (SAP), and is responsible for the connection / disconnection of the switch in the call Means (SWP), means for translating station numbers or numbers (NTP), means (SLP) for initiating calls of general subscribers, means for initiating calls for ISDN subscribers (ISLP), and R2 Controlling the common line signaling incoming call of the switching system, which has a means (TLP) to handle the relay call of the system type and a means (DTLP) to handle the relay call of the CCS No.7 signaling system. A method comprising: a first step of receiving a call establishment mark and recognizing an ISUP relay call; A second step of preparing an incoming call by checking whether a required resource is received upon receiving a call setting request; Translating the called number and determining the called subscriber as an ISDN subscriber or a general subscriber according to the called party's number; A fourth step of processing the calling party request message and the response message of the called subscriber according to the result of the third step; And performing a fourth step of processing a call recovery by the called party and the calling party according to the call recovery or the call recovery attempt of the called party after performing the fourth step. To provide.

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

FIG. 1 is a schematic diagram of a processor of a TDX-1A (registered trademark) as an example of a hardware configuration for executing software for performing an incoming call control (CCI) function.

In the drawing, DTLP is a digital trunk control processor, TLP is an analog trunk control processor, ISLP is an ISDN subscriber processor, SLP is a general subscriber processor, SWP is a switch control processor, NTP is a number translation processor, SAP is a system monitoring processor, SMP is a system. Each maintenance control processor is shown.

As shown in the drawings, the hardware to which the present invention is applied includes an SMP for the maintenance of the system, an SAP for informing the operator of the status of the system and inputting and outputting necessary commands, and a SWP for the connection / disconnection of the switch with a call. , NTP responsible for translating a country code or number, SLP responsible for forwarding of general subscribers, ISLP responsible for forwarding ISDN subscribers, TLP for R2 relay calls, CCS (common line) DTLP which handles relay call of No.7 signal system is provided.

2 is a block diagram schematically showing the software configuration of the digital trunk control processor (DTLP), where 1 is an outgoing call control (CCO) function unit, 2 is an incoming call control (CCI) function unit, and 3 Outgoing call control (CPCO) function, 4 is incoming call control (CPCI) function, 5 is signal process control (SPRC) function, 6 is common buffer, 7 is IPC (Inter-Processor Communication) buffer It is shown. Now, the configuration is briefly described as follows. As shown in the figure, the software configuration of the present invention is connected to the message transfer unit (MTP) to control the procedure of the call and the SPRC function unit 5 for distributing each message to the corresponding function block, the message related to the outgoing call The CPCO function unit (3) to control outgoing call processing from the SPRC, the CPCI function unit (4) to process incoming call-related messages, and control the CPCO message and communicate with the originating processor to control the flow of outgoing calls. The CCO function unit 1 and the CCI function unit 2 which control the message of the CPCI and communicate with the destination processor to control the flow of the incoming signal.

Here, the CCI function has a common buffer 6 in the processor for primitive delivery with CPCI, and a buffer 7 for message delivery with the called subscriber. In addition, CCI and CPCI function as a function call, and exchange information about a signal path and control a path as a signal flows.

3 is a flowchart of execution of software for performing an incoming call control (CCI) function according to the present invention.

In the process, when receiving a call setup mark from CPCI to recognize an ISUP relay call (11), the CCI checks whether the resources required for the call setup request are satisfied in its processor (12) to prepare for incoming call. If not enough, the call recovery process (27 to 30) of the called party is performed, and if resources are reserved, the called party is translated and determined according to the called party's number to distinguish the called party as an ISDN subscriber or a general subscriber (13). If the incoming call is an ISDN subscriber, the caller receives a calling request message from the called subscriber (14), notifies the calling number (15), and sends a call progress request to the CPCI (16). Then, if the call message is continuously received from the called party (17), the call request is sent to the CPCI (18). However, if the incoming call number translation result 13 is a general subscriber, the incoming call subscriber receives a call message (19), sends a call progress request (20) to the CPCI, and sends a signal success message to the called subscriber (21). . Then, it sends a call request back to CPCI (22). When the called party sends an incoming response message (23), the CCI establishes a call path (24) and sends a call setup response to the CPCI (25). Next, looking at the call recovery process, the call recovery attempt is the call recovery of the called party and the call recovery attempt of the calling party. Therefore, after the call setup response 25 described above, the type of call recovery to be attempted is first determined (26). If called party recovery is requested from the called party (27), the CCI sends a request for recovery to the CPCI (28), and cuts down the call path (29). Then, receiving the recovery confirmation signal from the CPCI (30) ends the execution. On the other hand, if the CPCI sends a recovery indication (31), the CCI sends a call recovery message to the called party to recover the call (32), disconnects the call (33), and sends a recovery response to the CPCI (30). To exit.

The present invention is configured and operated as described above to enable the control of incoming call using the ISUP function of CCS No. 7 signaling method to provide various services provided by the integrated information communication network to subscribers of the counterpart system. Has

Claims (1)

Means for maintaining the system (SMP), means for informing the operator of the system's status and inputting / receiving necessary commands (SAP), means for connecting / disconnecting switches in the call (SWP), station number or number Means (NTP) responsible for the translation of the call, means (SLP) responsible for the call forwarding of the general subscriber, means (ISLP) responsible for the call forwarding of the ISDN subscriber, and number responsible for the relay call of the R2 method (TLP). And a call setup indication in a method of controlling a common line signaling incoming call of a switching system having a DTLP for relaying a CCS (common line) No. 7 signal. 11) a first step of recognizing an ISUP relay call; A second step of preparing a incoming call by checking whether a required resource is received by receiving a call setup request (12); Translating the called number and determining the called subscriber as an ISDN subscriber or a general subscriber according to the called party's number (13); A fourth step of processing the calling party request message and the response message of the called subscriber according to the result of the third step (14 to 22); And a fifth step of processing (26 to 34) call recovery of the called party and the calling party according to the call recovery attempt of the called party or the call recovery attempt of the calling party after performing the fourth step. Incoming call control method of the common line signaling method comprising a.

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