KR20010111933A - The method for controling the point to multi point call in digital subscriber signaling system - Google Patents

Abstract

The present invention includes receiving an outgoing call setup signal by the calling party; Allocating resources according to the outgoing call setup and generating a corresponding process; Connecting a corresponding time switch according to routing information obtained through calling party subscriber information and called party number translation; Transmitting an incoming call setup signal to all called terminals of the corresponding line; Waiting for reception of a connection signal from the called terminal after receiving the asserting signal from the called terminal; The connection signal path is transmitted by sending a connection signal to the terminal that has transmitted the connection signal, and the terminal that has not transmitted the connection signal transmits a release signal to release the connection. The present invention relates to a point-to-multipoint call control method of a digital subscriber signal processing system, comprising: a multi-point unit capable of having up to eight NTs by using one ISDN number. Efficient service at the cost of In other words, the point-to-multipoint function provided by the present invention utilizes the advantage that up to eight physical devices can be bitten by S point NT equipment. One subscriber number can be used freely and efficiently, reducing the cost of additional services.

Description

Point-to-multipoint call control method of digital subscriber signal processing system {THE METHOD FOR CONTROLING THE POINT TO MULTI POINT CALL IN DIGITAL SUBSCRIBER SIGNALING SYSTEM}

The present invention relates to a digital subscriber signal processing system, and in particular, a point-to-multipoint call control function for connecting up to eight subscriber terminals to one network terminal and simultaneously connecting the subscriber terminals to one subscriber number. It relates to a digital subscriber signal processing system having a.

In general, the analog subscriber could only be supported by voice. In order to use other communication terminals, for example, a fax machine and a computer, a line must be distributed for each communication device.

Recently, ISDN service, which is newly introduced due to the rapid development of the information and telecommunications industry, also has the inconvenience of installing additional devices in order to simultaneously use up to eight different communication terminals.

The present invention has been made to solve the above problems, and provides a digital subscriber signal processing system having a point-to-multipoint call control function to provide a variety of services by simultaneously connecting up to eight subscriber terminals with one subscriber number. Its purpose is to.

1 is a block diagram illustrating a multipoint user interface of a digital subscriber signal processing system in accordance with the present invention.

2 is a call processing flow diagram illustrating a multipoint incoming software algorithm in accordance with the present invention.

3 is a block diagram showing the configuration of a digital subscriber signal processing system according to the present invention;

Figure 4 is a flow chart showing the incoming call setup flow in the digital subscriber signal processing system according to the present invention.

5 is a block diagram showing an example of signal flow in a digital subscriber signal processing system according to the present invention;

<Explanation of symbols for main parts of drawing>

1: IBSA 2: ISDA

3: BSIP 4: TCP

5: TSL

A feature of the present invention for achieving the above object is the step of receiving an outgoing call setup signal by the calling party; Allocating resources according to the outgoing call setup and generating a corresponding process; Connecting a corresponding time switch according to routing information obtained through calling party subscriber information and called party number translation; Transmitting an incoming call setup signal to all called terminals of the corresponding line; Waiting for reception of a connection signal from the called terminal after receiving the asserting signal from the called terminal; The connection signal path is transmitted by sending a connection signal to the terminal that has transmitted the connection signal, and the terminal that has not transmitted the connection signal transmits a release signal to release the connection. It is to provide a point-to-multipoint call control method of a digital subscriber signal processing system comprising the step of.

In a preferred embodiment, each called terminal is connected to a B channel of 2B + D only after receiving a connection technology signal from the ISDN exchange.

In a preferred embodiment, the called terminal is characterized in that more than one, not more than eight.

In a preferred embodiment, the incoming call setup signal is transmitted to each called terminal by a broadcasting method.

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

1 is a block diagram for explaining a point-to-multipoint call control method of a digital subscriber signal processing system according to the present invention. The ISDN switch 10 is a communication device 12 of a calling party and a communication device 14 of a called party. It is connected between) and performs exchange function for calling and incoming call.

In addition, the communication subscriber 12 of the calling subscriber is a network termination (NT, 12a) that performs the function of connecting between the ISDN terminal device and the ISDN network in the integrated information communication network, voice and non-voice connected thereto Communication apparatus For example, it comprises a digital telephone 12b, a fax 12c, a PC 12d, and a telephone 12e.

The communication device 14 of the called party is a line termination device 14a which performs a function of connecting an ISDN terminal device and an ISDN network in an integrated information communication network (ISDN), and an example of a voice and non-voice communication device connected thereto. For example, it comprises a digital telephone 14b, a fax 14c, a PC 14d, and a telephone 14e.

Here, the configuration of the ISDN switch 10 will be described in more detail.

FIG. 2 is a block diagram illustrating the configuration of an ISDN exchange in detail. The communication device of the calling / receiving subscriber is connected through a termination adapter (TA) 20 for matching non-ISDN terminals to access ISDN in a comprehensive information communication network. 16, an ISDN exchange 10 is provided.

The ISDN switch 10 includes an ISDN Telephony Control Subsystem for ISDN (hereinafter referred to as TCSI, 10a), which performs ISDN outgoing / outgoing call control, and an interconnection network subsystem for communication data processing. Network Subsystem (hereinafter referred to as INS, 10b) and Operation and Maintenance Processor (hereinafter referred to as OMP, 10c) for performing a maintenance function.

In addition, the TCSI communicates with a Frame Multiflexing Communication Board Assembly (FMCA) for performing multiplexing of frame data, and a Frame Multiexing Processor (FMXP) having a control function for multiplexing processing. ISDN telephone control with time switch (TSW) with time division of channels, time switch processor (TSP) with time division control of communication channels, and ISDN call control It consists of a Telephony Control Processor for ISDN (TCPI).

The INS 10b connected to the TCSI 10a may include a space switch (SSW) for physically connecting a corresponding channel, a space switch processor (SSP) for controlling a space switch, and data communication. An interconnection network processor (INP) for processing and a Number Translation Processor (NTP) for decoding subscriber information according to the called number. The OMP 10c connected to the INS performs a maintenance function and includes storage means having a database built therein.

The detailed structure of the TCPI in which the point-to-multipoint call control method according to the present invention is provided in a program form is as follows.

FIG. 3 is a block diagram showing a substructure of TCPI equipped with a point-to-multipoint call control method of an ISDN switch according to the present invention. The Telephony Control Processor (ISDN) 42 is configured for redundancy. Two Basic Subscriber Interface Processors (BSIPs) 44.

Each BSIP 44 includes a 16-channel ISDN Subscriber D channel processing board assembly (ISDA) 46 for processing communication data of ISDN subscribers. Includes 16 channels of ISDN Basic Subscriber Board Assembly (IBSA) 48 for processing communication data of subscribers of ISDN subscribers of the channel.

As shown in the figure, one ISDA has 16 IBSAs and can accommodate 256 subscribers, and one BSIP has 16 ISDAs and can accommodate 4096 subscribers. This BSIP has an extra BSIP for redundancy, thereby stabilizing the communication system.

The point-to-multipoint call control method of the ISDN exchange having the above-described configuration will be described in detail.

FIG. 4 is a flowchart illustrating a point-to-multipoint call control method of an ISDN exchange according to the present invention, in which a calling subscriber performs a first step (S110) of performing a call setup by making a call to a called party. Subsequently, after performing the second step (S120) of allocating the resources of the called subscriber according to the call setup and generating the corresponding process, the third step (S130) of checking the information of the calling subscriber is performed.

Subsequently, the ISDN exchange obtains routing information through the translation of the called number, and then performs a fourth step (S140) of connecting the corresponding time switch, and the ISDN exchange sets up the incoming signal by the brocasting method at the data link layer to the called terminal. Proceed to the fifth step (S150) to perform the.

As a subsequent step, according to the incoming call setup, the called party terminal transmits an alerting signal to the exchange, and the ISDN exchange performs a sixth step (S160) of receiving an alerting signal, and the ISDN The exchange proceeds to a seventh step (S170) of transmitting and receiving a connection signal with the first called terminal corresponding to the at least one calling signal.

Therefore, an eighth step (S180) of maintaining a call state by connecting a call path to the first called terminal is performed.

The point-to-multipoint call control method having the above-described steps will be described as a call processing map as follows.

5 is a diagram illustrating a call processing flow when performing a point-to-multipoint call control method of an ISDN switch according to the present invention. The ISDN switch 50 has a digital telephone 54 of a called party through an NT 52 (TEI = 1). ), A fax 56 (TEI = 2), and a PC 58 (TEI = 3) are connected. Up to eight such communication terminals may be connected.

First, the call request signal by the calling party is entered into the ISDA through the IBSA inside the ISDN exchange 50, and the call requests entered in each ISDA are distinguished by a call reference number called CR. The data format of is shown in Table 1.

As shown in Table 1, the data format is composed of 8 bit (Octet) units. Each call request is distinguished by the call reference number, and each call has a different state as it progresses.

TABLE 1

protocol 0 0 0 0 Length of call reference number Call reference number 0 Message type Other information

In accordance with the call request of the calling subscriber, the ISDN exchanger 50 allocates the resources of the called party, performs the verification process of the calling subscriber, and then transmits the call-up signal to each terminal of the called party by the broadcast casting method. do.

The same call-up signal is transmitted to the digital telephone 54, the fax 56, and the PC 58, which are the same number, and the corresponding terminal receiving the signal transmits the attracting signal to the ISDN exchange 50. do.

When the first called terminal is determined through the at least one signaling signal, and the corresponding digital telephone 54 transmits a connection signal to the ISDN exchange 50, the ISDN exchange 50 connects to the digital telephone 54. The communication state is established by connecting a call path between the calling party terminal and the called party terminal while transmitting an acknowledge signal.

Separately, the ISDN switch 50 releases the release signal, that is, the disconnect signal from the PC 58, to the PC 58 that has not received the connection acknowledgment signal from the incoming terminal receiving the at least one receiving signal. The connection is released by receiving the disconnection completion signal.

As described above, the present invention provides a multi-function integrated service that an analog phone cannot support when providing an ISDN service. A subscriber can simultaneously use a 2B + D channel so that a subscriber can make a voice call through one channel. You can try to transfer data through another channel.

In addition, by implementing a multi-point unit that can bite up to eight NTs using a single ISDN number, it is possible to efficiently service expansion at low cost.

In other words, the point-to-multipoint call control function provided by the present invention utilizes the advantage that up to eight physical devices can be bitten by the NT device of point S. The user can freely and efficiently use a single subscriber number, thereby reducing the cost of additional services.

Claims (4)

Allocating resources according to an outgoing call setup by the calling party and creating a corresponding process; Connecting a corresponding time switch according to routing information obtained through calling party information and called party number translation, and transmitting an incoming call setup signal to all called terminals on the corresponding line; After receiving the asserting signal from the called terminal, waiting for the connection signal from the called terminal; The connection signal path is transmitted by sending a connection signal to the terminal that has transmitted the connection signal, and the terminal that has not transmitted the connection signal transmits a release signal to release the connection. Point to multi-point call control method of the digital subscriber signal processing system comprising the step of. The method of claim 1, And each called terminal accesses a B channel of 2B + D only after receiving a connection technology signal from the ISDN exchange. The method of claim 1, And at least one, and not more than eight called terminals. A method for point-to-multipoint call control of a digital subscriber signal processing system. The method of claim 1, The incoming call setup signal is transmitted to each called terminal by a broadcasting method. Point to multipoint call control method of a digital subscriber signal processing system.